Дисертації: "Shin module"

1

Salerno, Benjamin D. "Controller design, analysis, and prototype for ship service converter module." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA313846.

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2

Gray, Weston L. "DC to DC power conversion module for the all-electric ship." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68166.

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Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 91-92).
The MIT end to end electric ship model is being developed to study competing electric ship designs. This project produced a model of a Power Conversion Module (PCM)- 4, DC-to-DC converter which interfaces with the MIT model. The focus was on the Medium Voltage DC (MVDC) architecture, and therefore, the PCM-4 converts a MVDC bus voltage of 3.3, 6.5 or 10 kVDC to 1 kVDC. The design describes the transient and steady-state behavior, and investigates the naval architecture characteristics. A modular architecture, similar to SatCon Applied Technology's Modular Expandable Power Converters, was selected as the best balance for the wide variation in loads experienced. The model consists of a standard module that can be paralleled internally to provide for a wide range of system power requirements. Naval architecture parameters, such as weight, volume, efficiency, and heat load, were compiled into a parametric format allowing a reasonable approximation of actual weight and volume as a function of rating and efficiency and heat load as a function of loading. All of the parameters were evaluated for dependence on the MVDC bus voltage. Verification of the model was pursued through comparison to available simulations of similar power electronics to ensure that the model provided reasonable time response and shape. Finally, the model met all requirements with the exception of efficiency which was slightly lower than the requirement although several ideas were presented to improve efficiency.
by Weston L. Gray.
S.M.
Nav.E.

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3

Barnum, Usher L. "Business process re-engineering: application for littoral combat ship mission module acquisition." Monterey, California. Naval Postgraduate School, 2006. http://hdl.handle.net/10945/10121.

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MBA Professional Report
The purpose of this MBA Project is to investigate the possibility/feasibility of re-engineering the Littoral Combat Ship Mission Module (PMS-420) business process to function more efficiently. The Defense Acquisition system is designed to support the National Security Strategy by managing the technologies and programs that produce weapons system for the United States Armed Forces. Although the overall acquisition system functions well as designed, the purpose of this paper is to investigate the business process within PMS-420, and whether another design is more efficient. This paper will review the genesis of PEO LMW and its basic functionality as well as discuss in detail the unique business process of PMS-420 and its varied inter-agency relationships. This paper will discuss the efficient business processes of two other acquisition programs within PEO LMW; 1) Naval Special Warfare (PMS-340) and 2) Explosive Ordnance Disposal (PMS-408). While discussing these other acquisition programs this paper will note the particular business processes and management policies that promote efficiency, and whether these attributes can be applied to PMS-420. The final portion of this paper will be a summary of the findings and recommendations to PMS 420 in order for it to function more efficiently.

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4

Ault, William R. "Design and implementation of an operations module for the ARGOS paperless ship system." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26969.

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Approved for public release; distribution in unlimited.
The "paperless' ship is an idea wvhich has been advocated at the highest levels in the Navy. The goal is to eliminate the enormous amount of paper required in the normal operation of a modern naval warship. The ARGOS system under development at the Naval Postgraduate school is a prototype solution which uses HyperCard/HyperTalk for prototype development. The operations functional area, including sections for training, scheduling, message generation, and publication management is an important part of this development.
http://archive.org/details/designimplementa00ault

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5

Руденко, Павло Андрійович. "Технологічне забезпечення токарного оброблення деталей складної конструкції". Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/30836.

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Структура та об’єм роботи. У магістерську дисертацію входить вступ, 4 розділи, загальні висновки, список використаної літератури. Робота складається з 96 сторінок тексту, 21 таблиці, 43 рисунків та 10 літературних джерел. Актуальність теми. Для сучасного виробництва одним з найважливіших аспектів є час оброблення деталей, тому що це напряму має вплив на економічну складову. Для виробництва, яке виготовляє складові для протезів нижніх кінцівок, час є найголовнішою проблемою через те, що реалізація деталей відбувається за рахунок проведення тендеру у якого є певні межі часу на виконання. Тому автору необхідно було надати рекомендації для скорочення операційного часу на 20%. Мета та завдання дослідження. Проаналізувати наявний метод виготовлення деталі складної конструкції «Корпус». Проаналізувати та надати рекомендації по модернізації технологічного процесу за рахунок використання сучасного технологічного оснащення. Дослідити, оптимізувати, та впровадити в роботу нові засоби виробництва. Об’єкт дослідження – технологічний процес виготовлення модуля гомілки регульовано-з`єднувального вузла який має складну конструкцію. Предмет дослідження – скорочення операційного часу для виготовлення однієї деталі. Методи дослідження: ознайомлення та аналіз технологічного процесу, дослідження виникнення проблем технологічної системи яка використовується, аналіз каталогів провідних компаній по виробництву оснащення для отримання повної інформації використання сучасних технологій, дослідження режимів роботи обладнання для можливості зробити рекомендації по оптимізації. Наукова новизна отриманих результатів: 1. Дослідження рекомендованих режимів роботи технологічного оснащення на прикладі працюючого виробництва, оптимізація цих режимів та встановлення похибки для подальшого її використання при впроваджені нового оснащення. 2. Розробка універсального методу визначення координат осі різального інструменту під час використання редукторів з поворотним кутом осі шпинделя та його впровадження в умовах реального виробництва. Практичне значення отриманих результатів. Отримані результати були впроваджені на виробництві підприємства ТОВ «КБ «Імпульс» та в повну міру використовуються в робочому процесі. В наявності є довідка з виробництва на якому впроваджені результати роботи. Також в наявності є екземпляр експериментального дослідження для підтвердження працездатності результатів.
Structure and scope of work. The master's thesis includes an introduction, 4 sections, general conclusions, a list of used literature. The work consists of 96 pages of text, 21 tables, 43 drawings and 10 literary sources. Actuality of theme. For modern production, one of the most important aspects is the time of machining of parts, because this direction has an impact on the economic component. For the manufacturing of components for lower limb prostheses, time is the main problem because parts are sold through a tender that has certain time limits for execution. Therefore, the author had to provide recommendations for reducing operating time by 20%. The purpose and objectives of the study. To analyze the existing method of manufacturing a part of complex construction "Hull". Analyze and provide recommendations for the modernization of the technological process through the use of modern technological equipment. Investigate, optimize, and deploy new production tools. The object of study - is the technological process of manufacturing the module of the shin of the adjustable-connecting node, which has a complex design. The subject of the study- is the reduction of operating time for the manufacture of one part. Research methods: familiarization and analysis of the technological process, investigation of the problems of the technological system used, analysis of the catalogs of leading equipment manufacturing companies to obtain complete information on the use of modern technologies, the study of equipment operating modes to be able to make optimization recommendations. Scientific novelty of the obtained results: 1. Investigation of the recommended operating modes of technological equipment on the example of a working production, optimization of these modes and establishment of an error for its further use when introducing new equipment. 2. Development of a universal method for determining the coordinates of the axis of the cutting tool when using gearboxes with a rotating angle of the spindle axis and its implementation in real production. The practical significance of the results obtained. The obtained results were implemented at the production of the enterprise of DO"Impulse" Co., Ltd and are fully used in the working process. There is a production certificate on which the results of work are implemented. A copy of the experimental study is also available to confirm the workability of the results.
Структура и объем работы. В магистерскую диссертацию входить введение, 4 главы, выводы, список использованной литературы. Работа состоит из 96 страниц текста, 21 таблиц, 43 рисунков и 10 литературных источников. Актуальность темы. Для современного производства одним из важнейших аспектов есть время обработки деталей, потому что это напрямую влияет на экономическую составляющию. Для производства которое производит составляющие для протезов нижних конечностей, время является самой главной проблемою из-за того, что реализация деталей происходит за счет проведения тендера у которого есть определенные сроки времени на выполнение. Поэтому автору необходимо было предоставить рекомендации для сокращения операционного времени на 20%. Цель и задачи исследования. Проанализировать имеющийся метод изготовления детали сложной конструкции «Корпус». Проанализировать и предоставить рекомендации по модернизации технологического процесса за счет использование современного технологического оборудования. Иследовать, оптимизировать, и внедрить в работу новые средства производства. Объект исследования - технологический процесс изготовления модуля голени регулировано-соединительного узла который имеет слжную конструкцию. Предмет исследования - сокращение операционного времени для изготовления одной детали. Методы исследования: Ознакомление и анализ технологического процесса, исследования возникновение проблем технологической системы которая используется, анализ каталогов ведущих компаний по производству оснастки для получение полной информации использование современных технологий, исследования режимов работы оборудования для возможности сделать рекомендации по оптимизации. Научная новизна полученных результатов: 1. Исследование рекомендованных режимов работы технологического оборудования на примере работающего производства, оптимизация этих режимов и установления погрешности для дальнейшего ее использование при внедрении нового оснащения. 2. Разработка универсального метода определения координат оси инструмента во время использование редукторов с поворотным углом оси шпинделя и его внедрение в условиях реального производства. Практическое значение полученных результатов. Полученные результаты были внедрены на производстве предприятия ООО «КБ« Импульс »и в полную меру используются в рабочем процессе. В наличии есть справка от производства на котором внедрены результаты работы. Также в наличии имеется экземпляр экспериментального исследования для подтверждения работоспособности результатов.

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6

Stallings, Brad L. "Design of a ship service converter module for a reduced-scale prototype integrated power system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.navy.mil/100.2/ADA392078.

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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, December 2001.
Thesis advisor(s): Ciezki, John G. ; Ashton, Robert W. "December 2001." Includes bibliographical references (p. 201-202). Also available in print.

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7

Wilson, Stephen K. "The mathematics of ship slamming." Thesis, University of Oxford, 1989. http://ora.ox.ac.uk/objects/uuid:7bc325cf-e6a1-45d2-add2-100d9968354c.

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Motivated by the motion of a ship in a heavy sea, a mathematical model for the vertical impact of a two-dimensional solid body onto a half-space of quiescent, inviscid, incompressible fluid is formulated. No solutions to the full problem are known, but in the case when the impacting body has small deadrise angle (meaning that the angle between the tangent to the profile and the horizontal is everywhere small) a uniformly valid solution is obtained by using the method of matched asymptotic expansions. The pressure on the body is calculated and is in fair agreement with experimental results. The model is generalised for more complicated impacts and the justifications for the model are discussed. The method is extended to three-dimensional bodies with small deadrise angle and solutions are obtained in some special cases. A variations! formulation of the leading order outer problem is derived, which gives information about the solution and leads to an fixed domain scheme for calculating solutions numerically. A partial linear stability analysis of the outer problem is given which indicates that entry problems are stable but exit problems are unstable to small perturbations. A mathematical model for the effect of a cushioning air layer between the body and the fluid is presented and analysed both numerically and in appropriate asymptotic limits. Finally, the limitations of the models are discussed and directions for future work indicated.

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8

Obisesan, Abayomi. "Stochastic damage modelling of ship collisions." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231845.

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Ship collision accidents are rare events but pose huge threat to human lives, assets, and the environment. Collision resistance of ships is usually assessed in terms of ship structural response such as member displacement, energy dissipation and the extent of damage. Many researchers have sought for effective models that compute ship stochastic response during collisions by considering the variability of collision scenario parameters. However, the models were limited by the capability of the collision computational models and did not completely capture collision scenario, and material and geometric uncertainties. In addition, the simplified models capturing the input-response relationships of the ship structural impact mechanics are in implicit forms which makes them unsuitable for assessing the performance of structural design specifications in collisions. Furthermore, with increasing ship passages in the Arctic region, the probabilities of ship-iceberg interactions are increasing, highlighting the need to focus on risk based ship designs. In this research, a conceptual stochastic modelling framework is developed for performance characterisation and quantitative risk assessment of ship-ship and ship-iceberg collisions. In this direction, an interface for automated stochastic finite element computations was developed to model ship structural resistance in reference collision scenarios. The stochastic structural response was characterised based on the onset of the ship structural failure. The focus was initially on ship-ship collisions to quantify the uncertainties experimentally and to characterise the performance for a variety of striking ships. The framework was then extended to consider probabilistic performance measures in ship-iceberg collisions. The computationally intensive collision response models were captured with efficient surrogate representations so that the performance measures can be obtained with gradient based reliability approaches. The most probable input design sets for the response distribution were sampled with Latin Hypercube models. The probabilistic performance measures were also combined with available collision frequency models from literature for risk computations and to demonstrate the risk tolerance measures. The framework underlines the significance of different risk components, providing valuable guidance for improving risk-based ship designs. Although, a double-hull crude oil carrier is presented as the struck ship, the approach can be readily extended to characterise the performance and risk of other ship structures in collisions.

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9

Melvin, James E. "AUV fault detection using model based observer residuals." Thesis, Monterey, Calif. : Naval Postgraduate School, 1998. http://bosun.nps.edu/uhtbin/hyperion-image.exe/NPS-ME-98-004.pdf.

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Thesis (M.S. in Mechanical Engineering and Mechanical Engineer) Naval Postgraduate School, June 1998.
Title from cover. Thesis advisor(s): Anthony J. Healey. "June 1998."--Cover. "NPS-ME-98-004"--Cover. Includes bibliographical references (p. 117-118). Also available online.

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10

繆泉明 and Quanming Miao. "Effect of submerged vertical structures on ship waves." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B3025176X.

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11

Gong, Qi, and 龔綺. "Gerber-Shiu function in threshold insurance risk models." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40987966.

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12

Saavedra, Cayan Atreio Portela Bárcena. "Um aplicativo shiny para modelos lineares generalizados." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-22012019-174209/.

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Recentes avanços tecnológicos e computacionais trouxeram alternativas que acarretaram em mudanças na forma com que se faz análises e visualizações de dados. Uma dessas mudanças caracteriza-se no uso de plataformas interativas e gráficos dinâmicos para a realização de tais análises. Desta maneira, análises e visualizações de dados não se limitam mais a um ambiente estático, de modo que, explorar a interatividade pode possibilitar um maior leque na investigação e apresentação dos dados. O presente trabalho tem como objetivo propor um aplicativo interativo, de fácil uso e interface amigável, que viabilize estudos, análises descritivas e ajustes de modelos lineares generalizados. Este aplicativo é feito utilizando o pacote shiny no ambiente R de computação estatística com a proposta de atuar como ferramenta de apoio para a pesquisa e ensino da estatística. Usuários sem afinidade em programação podem explorar os dados e realizar o ajuste de modelos lineares generalizados sem digitar uma linha código. Em relação ao ensino, a dinâmica e interatividade do aplicativo proporcionam ao aluno uma investigação descomplicada de métodos envolvidos, tornando mais fácil a assimilação de conceitos relacionados ao tema.
Recent technological and computational advances have brought alternatives that have led to changes in the way data analyzes and visualizations are done. One of these changes is characterized by the use of interactive platforms and dynamic graphics to carry out such analyzes. In this way, data analyzes and visualizations are no longer limited to a static environment, so exploring this dynamic interactivity can enable a wider range of data exploration and presentation. The present work aims to propose an interactive application, easy to use and with user-friendly interface, which enables studies and descriptive analysis and fit generalized linear models. This application is made using the shiny package in the R environment of statistical computing. The purpose of the application is to act as a support tool for statistical research and teaching. Users with no familiarity in programming can explore the data and perform the fit of generalized linear models without typing a single code line. Regarding teaching, the dynamics and interactivity of the application gives the student an uncomplicated way to investigate the methods involved, making it easier to assimilate concepts related to the subject.

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13

Jacobson, Kevin Robert. "The Littoral Combat Ship (LCS) Surface Warfare (SUW) module determining the best mix of surface-to-surface and air-to-surface missiles." Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/5207.

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Approved for public release, distribution unlimited
Asymmetric threats pose increasing challenges to the United States Navy in littoral environments. To address the Navy's need for a new platform to serve in this area, the Littoral Combat Ship (LCS) was designed and put into service. What still has yet to be determined is what surface-to-surface capability the LCS will have as well as what air-tosurface capability the LCS helicopter/unmanned aerial vehicle (UAV) will have. This study uses freely available data to build a simulation utilizing an agent-based modeling platform known as MANA. The simulation is exercised over a broad range of different weapon systems types with their capabilities ranged across the spectrum of possibilities based on their effectiveness as well as potential difficulties in targeting small boat threats. Using linear regression and partition trees, an analysis is performed on the resulting dataset to address the research question. The results show that the NLOS system is the best surface-to-surface missile system for the LCS as long as the expected rate of fire is obtained. The best air-tosurface missile system is either APKWS or LOGIR, depending on which can obtain a rate of fire of one missile every nine seconds or faster. Lastly, the rate of fire has been shown to be the most important factor in determining the effectiveness of the different missiles.

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14

Gutierrez, Louis Michael. "Agent-based simulation of disease spread aboard ship." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FGutierrez.pdf.

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Thesis (M.S. in Modeling, Virtual Environments and Simulations (MOVES))--Naval Postgraduate School, March 2005.
Thesis Advisor(s): Chris Darken. Includes bibliographical references (p. 47-48). Also available online.

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15

Eigelaar, Lerika Susan. "Scale model validation of QUAYSIM and WAVESCAT numerical models of ship motions." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96758.

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Thesis (MSc)--Stellenbosch University, 2015.
ENGLISH ABSTRACT: Various numerical modelling software packages are available for predicting moored ship motions and forces. The focus of this study was to validate the numerical models QUAYSIM and WAVESCAT and how these models together form a procedure for predicting moored ship motions and forces under the impact of high and low frequency waves. The validation procedure applied in the study involved numerical modelling of a given physical model situation in which moored ship motions and forces were measured under both high and low frequency wave conditions. A physical model with built-in bathymetry was provided by the Council for Scientific and Industrial Research (CSIR) Hydraulics Laboratory in Stellenbosch. The model consisted of a moored container vessel at a jetty, with various mooring lines and fenders. A JONSWAP spectrum, which combines high and low frequency wave components, was used to simulate wave conditions for the modelling of ship motions. The wave periods and wave heights were measured at observation stations located at specific points in the basin. Other measurements such as those of the forces in the fenders and mooring lines were also determined. A multi-step approach was used to numerically predict the ship motions and forces. Firstly, the coastal processes occurring within the basin, which was set up to simulate the physical model wave behaviour, were measured to calibrate the SWAN Delft3D-WAVE model. The wave heights and periods for the respective observation stations were obtained and compared to the physical model measurements. The Delft3D-FLOW SURFBEAT model was used to calculate the low frequency waves in the coastal area. Low frequency waves are the main cause of larger ship motions and forces, therefore it is important to investigate them as part of the ship motion prediction procedure. After the waves had been computed, wave forces acting on the vessel needed to be determined for both high and low frequency waves. These wave forces were modelled with the combinations SURFBEAT/LF-STRIP (low frequency waves) and SWAN/WAVESCAT (high frequency waves). LF-STRIP provided the link between low frequency wave models and ship motion models, converting the low frequency waves into long wave forces acting on the vessel. WAVESCAT converted the high frequency waves to short wave forces. The calculated long wave forces and short wave forces served as the input required to run the ship motion model QUAYSIM to determine the movements of the moored ship as well as the restraining forces in the lines and fenders. The ship motions and forces were compared to the physical model, with the intention of possibly validating the QUAYSIM/WAVESCAT approach for predicting moored ship motions. The study provides an overview of both the setup and results of the physical and numerical model. A description of each of the numerical models SWAN, SURFBEAT, LF-STRIP, WAVESCAT and QUAYSIM is provided, along with a comparison between the physical and numerical models for each procedure. The validation procedure provided useful documentation of the quality of these numerical modelling approaches, already in use in some design projects. The numerical models WAVESCAT and QUAYSIM models of ship motion have shown to provide a good correlation between the physical model and the numerical approach. However, improvements are still required. Good comparisons were obtained for the long wave motions (horizontal movements - surge, sway and yaw). The surge and sway motions were slightly overestimated by QUAYSIM. The magnitude of the yaw was comparable but the not well represented in spectral plots.
AFRIKAANSE OPSOMMING: Daar is verskeie numeriese modellering-sagtewareprogramme beskikbaar waarmee skipbewegings en -kragte voorspel kan word. Die fokus van hierdie studie was om die numeriese modelle QUAYSIM en WAVESCAT te valideer. Saam vorm hierdie twee modelle ’n prosedure om vasgemeerde skipbewegings en -kragte veroorsaak deur lang- en kortgolfaksie te bepaal. Die validasieprosedure wat in hierdie studie gebruik is, behels ’n numeriese modelering van ’n fisiese situasie waar ’n vasgemeerde skip se bewegings en kragte onder kort- en langgolfkondisies gemeet is. ’n Fisiese model met ingeboude batimetrie is voorsien deur die Council for Scientific and Industrial Research (CSIR) se hidroliese laboratorium in Stellenbosch. Die model bestaan uit ’n vasgemeerde houerskip by ’n pier met verskeie ankerlyne en bootbuffers. ’n JONSWAPspektrum, wat kort- en langgolfkomponente kombineer, is gebruik om golfomstandighede vir die modellering van skipbewegings te simuleer. Golfperiodes en golfhoogtes is by spesifieke waarnemingstasies in die gesimuleerde hawe-area gemeet. Verdere opmetings, soos dié van die kragte in die bootbuffers en ankerlyne, is ook gedoen. ’n Stap-vir-stap benadering is gevolg om die skipbewegings numeries te voorspel. Eerstens is die kusprosesse wat in die gesimuleerde hawe plaasvind, gekalibreer met die numeriese paket SWAN Delft3D-WAVE. Die golfhoogtes en golfperiodes vir elke waarnemingstasie is bereken en vergelyk met die fisiese model se opmetings. Die SURFBEAT-module van Delft3D-FLOW is gebruik om die lae-frekwensie golwe in die kusarea te bereken. Lae-frekwensie golwe is die hoofoorsaak van skipbewegings en daarom is dit belangrik om dit te ondersoek gedurende die voorspellingsprosedure van skipbewegings. Na die golwe bereken is, moes die kragte wat beide kort en lang golwe op die skip uitoefen ook bereken word. Hierdie golfkragte is gemodelleer deur middel van die kombinasies SURFBEAT/LFSTRIP (langgolwe) en SWAN/WAVESCAT (kortgolwe). LF-STRIP het die skakel tussen golfmodelle en skipbewegingsmodelle verskaf en die lae-frekwensie golwe omgeskakel in langgolfkragte wat op die skip uitgeoefen is. WAVESCAT het die hoë-frekwensiegolwe omgeskakel in kortgolfkragte wat op die skip uitgeoefen is. Die berekende langgolf- en kortgolfkragte is ingevoer op die skipbewegingsmodel QUAYSIM om die skipbewegings en inperkingskragte in die bootbuffers en ankerlyne te bepaal sodat dit vergelyk kon word met die fisiese model, met die doel om moontlik die QUAYSIM/WAVESCAT-prosedure om gemeerde skipbewegings te voorspel te valideer. Die studie verskaf ’n oorsig van die opstel en resultate van die fisiese en numeriese modelle. Elk van die numeriese modelle SWAN, SURFBEAT, LF-STRIP, WAVESCAT en QUAYSIM word beskryf en vergelykings word getref tussen die numeriese en fisiese modelle vir elke prosedure. Die validasieprosedure verskaf nuttige dokumentasie van die kwaliteit van hierdie numeriese modeleringsprosedures wat reeds in sekere ontwerpprojekte gebruik word. Die numeriese WAVESCAT en QUAYSIM modelle van skipbewegings het ’n goeie korrelasie tussen die fisiese model en die numeriese benadering gelewer. Verbeteringe is wel steeds nodig. Goeie vergelykings is verkry vir langgolfbewegings (horisontale bewegings – stuwing (“surge”), swaai (“sway”) en gier (“yaw”)). Die stu- en swaaibewegings was effens oorskat met QUAYSIM. Die grootte van die gier was wel vergelykbaar maar is nie grafies goed uitgebeeld nie.

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16

Rhoades, Mark M. "A study of the airwake aerodynamics over the flight deck of an AOR model ship." Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA241008.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, September 1990.
Thesis Advisor(s): Healey, J. Val. Second Reader: Schmidt, L. V. "September 1990." Description based on title screen as viewed on December 18, 2009. DTIC Descriptor(s): Velocity, Air Flow, Flight Decks, Shear Properties, Measurement, Position(Location), Ships, Models, Layers, Edges, Boundary Layer, Flow Visualization, Tunnels, Curvature, Smoke, Stationary, Bubbles, Patterns, Helium, Flow, Ship Models, Video Signals, Anemometers, Earth Atmosphere, Deflectors, Photographic Equipment. DTIC Identifier(s): Wake, Naval Vessels(Support), Turbulence, Helicopters, Atmospheric Motion, Air Flow, Ship Models, Replenishment at sea, AOR Class Vessels, H-56 Aircraft, Wind Direction, Oilers(Naval Vessels), Rotor Blates(Rotary Wings), Impact, Vertical Replenishment, Blade Strike, Theses, Wind Tunnel Models. Author(s) subject terms: Flow Visualization, Simulated Atmospheric Boundary Layer, Helium Bubble Flow Visualization, Smoke Visualization, AOR Class ship. Includes bibliographical references (p. 84-85). Also available in print.

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17

Baeza, Fernández Damian Francisco. "Diseño y simulación de un sistema para el control del estado metabolico de células animales en cultivo." Tesis, Universidad de Chile, 2012. http://www.repositorio.uchile.cl/handle/2250/111533.

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Magíster en Ciencias de la Ingeniería, Mención Química
Ingeniero Civil Químico
Resultados experimentales señalan que las células animales pueden alcanzar múltiples estados metabólicos con distintas razones de tasa de producción de lactato a tasa de consumo de glucosa (DL=DG), lográndose razones muy por debajo de la razón estequiométrica igual a 2 [mol=mol]. En el presente trabajo de tesis se planteó y ajustó un modelo metabólico que describe el metabolismo de un cultivo de control y se corroboró su falta de capacidad de alcanzar más de un estado estacionario a través de la comparación con datos experimentales y un análisis de estabilidad posterior. La simplificación de dicho modelo inicial, la obtención de un único punto atractor como estado estacionario y el análisis de variaciones de niveles de expresión génica de ciertas enzimas glicolíticas permitió el planteamiento de un modelo de regulación que varía la concentración de la enzima lactato deshidrogenasa (LDH) con el cual se simuló un cultivo hasta alcanzar estado metabólico alterado (DL=DG <0,1 [mol=mol]). El modelo metabólico regulado se utilizó para la simulación de un cultivo continuo alterado para el diseño y ajuste de controladores proporcional (P), basado en modelo lineal y basado en modelo no lineal para la regulación de la concentración de glucosa de entrada frente a perturbaciones en el crecimiento celular. La simulación de la respuesta de lazo cerrado del sistema mostró una fuerte interacción de lazos con el lazo de control de crecimiento celular y los análisis de robustez y de sensibilidad permitieron concluir que el controlador P posee una mayor robustez que el controlador basado en modelo lineal, pero que este último posee una mejor respuesta frente a limitantes que podrían existir a nivel industrial. Por otra parte, el pobre desempeño del controlador basado en modelo no lineal demuestra un desafío de ajuste del mismo producto de las múltiples posibles fuentes del mal desempeño. Como línea de trabajo futuro se puede mejorar la respuesta simulada de los controladores basados en modelo, analizando la eliminación de offset para el caso lineal y los problemas de rendimiento del basado en modelo no lineal.

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18

Zhang, Lu. "Lecture sémiotique du Sou shen ji de Gan Bao : modèles théoriques et interprétations du discours." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPC0018/document.

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Le Sou shen ji搜神記est l’œuvre la plus représentative et influente du genre zhiguai志怪, sa valeur historique et artistique est incomparable par rapport aux autres œuvres pareilles. Son auteur Gan Bao幹寶est un historien et lettré très réputé sous la Dynastie Dong Jin. Parmi ses nombreuses œuvres historiques et littéraires, c’est le Sou shen ji qui a connu le plus grand succès. Cette œuvre recueille autour de quatre cent soixante-quatre récits indépendants l’un de l’autre, et dont les sujets sont d’une variété considérable, reflétant dans une certaine mesure la mentalité et les croyances des Chinois de l’époque. Dans notre thèse nous avons fait des recherches sur cette œuvre dans une perspective sémiotique, employant la théorie sémiotique de Greimas. Dans la partie discursive, nous avons fait des analyses discursives et culturelles autour de la conception chinoise du shen et à partir de quatre catégories : les dieux dotés d’une fonction (shen神), les immortels (xian仙), les revenants (gui鬼), et les yaoguai妖怪, pour dessiner une image plus claire du « shen » pour les Chinois. Nous voyons que la conception du shen dans la culture chinoise, se trouvant au carrefour de la religion, de la politique, et de l’éthique, n’est pas un concept défini sur le plan théologique et transcendantale. Dans la partie narrative, nous nous concentrons sur les traits narratifs des récits fantastiques du Sou shen ji, en essayant en même temps, de construire un modèle narratif plus applicable à ces récits et à la description d’une relation intersubjective
Sou shen ji is the most representative and influential work of the zhiguai genre, its historic and artistic value is unmatchable, compaired with other works of the same genre. The author, Gan Bao, is a very famous historian and scholar in Dong Jin dynasty. Among his numerous historical and literary works, it is Sou shen ji, who has had the biggest success. This work collects around four hundred and sixty-four stories independent one from each other, and the subjects are also very various, reflecting to some extent the mentality and the beliefs of the Chinese of the time. In this thesis, we have studied this work in a semiotic perspective, using the semiotic theory of Greimas. In the discursive part, we have done some analyses, from a discoursive and a cultural point of view, of the chinese conception of shen, from four categories : the gods who have a function (shen神), the immortals (xian仙), the ghosts (gui鬼), and the yaoguai妖怪, in order to draw a clearer picture of the conception of shen to the chinese. We can see that in the chinese culture, the conception of shen, located at the intersection of the religion, the politics, and the ethics, is not a concept defined in theological and transcendental termes. In the narrative part, we focus on the narrative features of the stories in Sou shen ji, and at the same time, we also try to build a narrative model which is more applicable to these stories and to the description of the intersubjective relationship

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19

NEILDEZ, OLIVIER. "Etude de la transmission sexuelle du vih dans le modele du macaque infecte experimentalement par le siv ou un virus chimere shiv." Paris 7, 1999. http://www.theses.fr/1999PA077182.

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Le virus de l'immunodeficience humaine (vih), agent etiologique du sida, est transmis principalement lors des contacts sexuels. Les mecanismes de ce type de transmission, ainsi que les proprietes biologiques des virus transmis restent encore mal connus. En outre, les consequences physiopathologiques de ce type de transmission, ainsi que son impact sur le systeme immunitaire muqueux sont encore a definir. Le modele experimental du macaque infecte par les voies muqueuses a l'aide du siv ou de virus chimeres shiv offre l'opportunite unique d'aborder en detail cette problematique. La strategie que nous avons employee a consiste a comparer les evenements virologiques et immunologiques apres l'inoculation de macaques au niveau des muqueuses rectale ou vaginale, ou apres injection intraveineuse, du siv ou d'un virus chimere shiv. Nous avons demontre que, lors de la transmission par voie vaginale d'un isolat primaire de siv comprenant une population virale heterogene, seulement 3 variants, parmi la dizaine que l'on peut identifier dans le stock viral, sont capables d'initier une infection. Ces variants different au niveau de la premiere region variable de l'enveloppe des virus majoritaires retrouves chez les singes infectes par voie veineuse ou rectale, et possedent une forte capacite de replication dans les macrophages. Ces resultats indiquent que des variants possedant des proprietes phenotypiques specifiques sont selectionnes au niveau de la muqueuse vaginale. Cependant, les differences dans les proprietes biologiques, entre le siv et le vih, ne permettent pas de definir si les modalites de cette selection sont les memes que pour l'homme infecte par le vih. Nous avons donc caracterise les evenements virologiques et immunologiques apres l'infection de macaques, par les voies muqueuses ou intraveineuse, a l'aide d'un virus chimere, le shiv 8 9. 6 p, qui exprime l'enveloppe d'un isolat primaire du vih-1. Celui-ci, de par son fort pouvoir pathogene, est capable d'induire, uniquement chez le singe expose par voie muqueuse, une infection caracterisee par une absence de seroconversion, une forte charge virale au niveau de la muqueuse vaginale et le developpement rapide d'un sida. Cependant, ses proprietes biologiques particulieres font qu'il n'est pas transmis efficacement par voie muqueuse en comparaison du siv.

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20

Tian, Lu. "Isolement et caractérisation de cellules souches cancéreuses dans un modèle murin de tumorigénèse mammaire." Thesis, Lille 2, 2018. http://www.theses.fr/2018LIL2S001/document.

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Le cancer du sein est le cancer est le plus fréquent chez la femme. Les patientes traitées par chirurgie, radiothérapie et/ou chimiothérapie peuvent souffrir de rechute et de métastases à plus ou moins long terme. Il est à présent admis qu’une sous-population de cellules particulières dénommées cellules souches cancéreuses (CSC) jouent un rôle important dans ces événements. Il est donc crucial d’isoler et de caractériser ces cellules pour comprendre leurs propriétés particulières d’autorenouvellement et de résistance aux traitements, ce qui permettra de les cibler pour obtenir des traitements plus efficaces. C’est dans ce contexte que s’inscrit ma thèse. Au laboratoire, j’ai mis en place un modèle de souris bi-transgéniques (bi-Tg) en croisant les souris C3(1)-Tag qui est un modèle de tumorigenèse mammaire (et prostatique) bien établi, avec les souris Tg s-SHIP-GFP qui ont déjà permis l’isolement de CS normales mammaires (et prostatiques). Dans ces souris, le promoteur de s-SHIP contrôle l’expression de la protéine fluorescente GFP ce qui permet de marquer et d’isoler les cellules. Dans les tumeurs mammaires développées par ces souris biTg, j’ai isolé une population rare de cellules s-SHIP/GFP+ possédant des propriétés de CSC, surtout une capacité à former des sphères en culture non adhérente et à générer des tumeurs par transplantation en série très supérieure à celle des autres cellules de la tumeur. Une analyse transcriptomique globale qui compare les gènes dérégulés dans les cellules GFP+ et GFP- a mise en évidence le rôle d’un composant de la voie Notch dans le maintien de la pluripotence.Nous avons également dérivé plusieurs lignées cellulaires dénommées MAM (pour mammary) à partir des tumeurs mammaires. L’une d’entre, MAM326 est une lignée de cellules épithéliales cancéreuses avec environ 10 % de cellules GFP+ et j’ai démontré que les cellules GFP+ sont plus résistantes à différentes drogues anti-cancéreuses ainsi qu’à l’irradiation. Une analyse transcriptomique a été réalisée pour déterminer la signature moléculaire de cette résistance. Cette analyse a mis en évidence une vingtaine de gènes significativement surexprimés dans les cellules GFP+, et dont la nature et/ou la fonction est pertinente dans le contexte d’une résistance aux traitements antitumoraux. L'un de ces gènes est la synucléine-gamma dont le rôle dans la radiorésistance du cancer du sein a été suggéré mais non démontré expérimentalement. Par la surexpression ectopique et l’inhibition par siRNA, nous avons démontré que la synucléine gamma peut induire la radiorésistance dans plusieurs lignées cellulaires de cancer du sein. En conclusion, ces résultats démontrent que l’expression de s-SHIP est un marqueur de CSC mammaires chez la souris et son intérêt dans l’étude du cancer du sein
Breast cancer is the most common cancer in women worldwide. The isolation and characterization of breast cancer stem cells (CSC) are crucial for understanding cancer biology and revealing potential therapeutic targets. One of the major issues in the study of CSC is the lack of reliable markers. A transgenic mouse model (Tg 11.5kb–GFP) was generated using the 11.5kb s-SHIP (stem-SH2-containing 5’-Inositol Phosphatase) promoter that specifically expressed enhanced green fluorescent protein (GFP) in embryonic and various tissue stem cells. In the mammary gland, previous experiments showed that GFP labels puberty cap cells and pregnancy basal alveolar bud cells, and it has been demonstrated that these mammary GFP+ cells are activated tissue stem cells. In order to determine if s-SHIP promoter expression could also mark mammary cancer stem cells, we generated a bi-transgenic mouse model by crossing Tg 11.5kb-GFP mice with Tg C3(1)/Tag mice. Tg C3(1)/Tag mice express SV40 T antigen under the regulatory control of the rat prostatic steroid binding protein C3(1) gene. In female mice, the transgene is expressed primarily in the mammary gland. Mice develop mammary hyperplasia by 3 months of age with subsequent development of mammary adenocarcinoma by 6 months of age.Here we show the presence of a rare population of GFP+ cells, which are also CD24+/CD49f+/CD29+ in mammary tumors of female bi-transgenic mice. As compared to GFP- cells, GFP+ cells exhibit both a higher tumor sphere-forming potential, and a higher tumorigenicity when transplanted into SCID and FVB recipient mice. Moreover, upon subsequent transplantation, the GFP+ cells generated heterogeneous tumors that displayed properties similar to the primary tumor. Transcriptomic analysis of these GFP+ vs GFP- cells revealed several differentially expressed genes including one protein implicated in the Notch pathway. In addition, from the murine mammary tumor, I have derived a cell line containing a s-SHIP/GFP+ subpopulation that shows resistance to chemotherapy and radiation. I have further studied this subpopulation and found that synuclein gamma could confer radiation resistance to breast cancer cells. Altogether, these results demonstrate that s-SHIP promoter expression is a marker of mammary CSC that enables their identification and isolation via a single consistent parameter

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21

Hittel, Steven George. "An experimental analysis of the hydrodynamic characteristics of the monoform: a novel hull form." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/91119.

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This thesis presents the results of an experimental investigation of the hydrodynamic characteristics of the Monoform hull in calm water. The forces acting on a 1.7 meter model were measured as the model was held captive and towed in calm water. The model was tested at speeds up to three meters per second. The rudders were held straight during one part of the study and were deflected during another to test both their ability to correct for pitching moment and to create yaw moments. The draft of the model was also varied during this study and included drafts of 1.90, 2.21, and 2.42 hull diameters. All three forces and all three moments were measured. The model was tested in a 31 meter towing basin located at Virginia Polytechnic Institute and State University. The results are presented in Figure form in the thesis body and in numerical form in an appendix. Recommendations for future work and improvements to the instrumentation are presented along with conclusions at the end of the thesis.
M.S.

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22

Goodman, William K. Infante Isaia Benette E. Rodriguez Roland G. "Item Unique Identification (IUID) marking for a littoral combat ship (LCS) class mission module (MM) at the mission package support facility (MPSF) implementation analysis and development of optimal marking procedures /." Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/MBAPR/2010/Jun/10Jun%5FGoodman%5FMBA.pdf.

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"Submitted in partial fulfillment of the requirements for the degree of Master of Business Administration from the Naval Postgraduate School, June 2010."
Advisor(s): Ferrer, Geraldo ; Brinkley, Douglas. "June 2010." "MBA Professional report"--Cover. Description based on title screen as viewed on July 14, 2010. Author(s) subject terms: Item Unique Identification, Littoral Combat Ship, Mission Package Support Facility, Unique Identification, Unique Item Identifier Includes bibliographical references (p. 83-87). Also available in print.

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23

Goodman, William K., Roland G. Rodriguez, and Isaia Benette E. Infante. "Item Unique Identification (IUID) marking for a littoral combat ship (LCS) class mission module (MM) at the mission package support facility (MPSF): implementation analysis and development of optimal marking procedures." Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/10524.

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MBA Professional Report
The purpose of this MBA project is to implement an effective solution to the DoD's mandatory January 2004 IUID policy for LCS MPs at the Port Hueneme MPSF. Our methodology was to analyze the item marking process to determine the optimal marking procedure for items that bypassed the MPSF. Logical Decisionsﾪ for Windows was utilized to determine the best course of action with regard to cost, crew burden, compliance achievement, and reduced mistakes. It was determined that, among five possible courses of action, waiting for a maintenance availability was the optimal solution.

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24

Irwin, Shaun George. "Optimal estimation and sensor selection for autonomous landing of a helicopter on a ship deck." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95894.

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Thesis (MEng)--Stellenbosch University, 2014.
ENGLISH ABSTRACT: This thesis presents a complete state estimation framework for landing an unmanned helicopter on a ship deck. In order to design and simulate an optimal state estimator, realistic sensor models are required. Selected inertial, absolute and relative sensors are modeled based on extensive data analysis. The short-listed relative sensors include monocular vision, stereo vision and laser-based sensors. A state estimation framework is developed to fuse available helicopter estimates, ship estimates and relative measurements. The estimation structure is shown to be both optimal, as it minimises variance on the estimates, and flexible, as it allows for varying degrees of ship deck instrumentation. Deck instrumentation permitted ranges from a fully instrumented deck, equipped with an inertial measurement unit and differential GPS, to a completely uninstrumented ship deck. Optimal estimates of all helicopter, relative and ship states necessary for the autonomous landing on the ship deck are provided by the estimator. Active gyro bias estimation is incorporated into the helicopter’s attitude estimator. In addition, the process and measurement noise covariance matrices are derived from sensor noise analysis, rather than conventional tuning methods. A full performance analysis of the estimator is then conducted. The optimal relative sensor combination is determined through Monte Carlo simulation. Results show that the choice of sensors is primarily dependent on the desired hover height during the ship motion prediction stage. For a low hover height, monocular vision is sufficient. For greater altitudes, a combination of monocular vision and a scanning laser beam greatly improves relative and ship state estimation. A communication link between helicopter and ship is not required for landing, but is advised for added accuracy. The estimator is implemented on a microprocessor running real-time Linux. The successful performance of the system is demonstrated through hardware-in-the-loop and actual flight testing.
AFRIKAANSE OPSOMMING: Hierdie tesis bied ’n volledige sensorfusie- en posisieskattingstruktuur om ’n onbemande helikopter op ’n skeepsdek te laat land. Die ontwerp van ’n optimale posisieskatter vereis die ontwikkeling van realistiese sensormodelle ten einde die skatter akkuraat te simuleer. Die gekose inersie-, absolute en relatiewe sensors in hierdie tesis is op grond van uitvoerige dataontleding getipeer, wat eenoogvisie-, stereovisieen lasergegronde sensors ingesluit het. ’n Innoverende raamwerk vir die skatting van relatiewe en skeepsposisie is ontwikkel om die beskikbare helikopterskattings, skeepskattings en relatiewe metings te kombineer. Die skattingstruktuur blyk optimaal te wees in die beperking van skattingsvariansie, en is terselfdertyd buigsaam aangesien dit vir wisselende mates van skeepsdekinstrumentasie voorsiening maak. Die toegelate vlakke van dekinstrumentasie wissel van ’n volledig geïnstrumenteerde dek wat met ’n inersiemetingseenheid en ’n differensiële globale posisioneringstelsel (GPS) toegerus is, tot ’n algeheel ongeïnstrumenteerde dek. Die skatter voorsien optimale skattings van alle vereiste helikopter-, relatiewe en skeepsposisies vir die doeleinde van outonome landing op die skeepsdek. Aktiewe giro-sydige skatting is by die posisieskatter van die helikopter ingesluit. Die proses- en metingsmatrikse vir geruiskovariansie in die helikopterskatter is met behulp van ’n ontleding van sensorgeruis, eerder as gebruiklike instemmingsmetodes, afgelei. ’n Volledige werkingsontleding is daarna op die skatter uitgevoer. Die optimale relatiewe sensorkombinasie vir landing op ’n skeepsdek is met Monte Carlo-simulasie bepaal. Die resultate toon dat die keuse van sensors hoofsaaklik van die gewenste sweefhanghoogte gedurende die voorspellingstadium van skeepsbeweging afhang. Vir ’n lae sweefhanghoogte is eenoogvisie-sensors voldoende. Vir hoër hoogtes het ’n kombinasie van eenoogvisie-sensors en ’n aftaslaserbundel ’n groot verbetering in relatiewe en skeepsposisieskatting teweeggebring. ’n Kommunikasieskakel tussen helikopter en skip is nie ’n vereiste vir landing nie, maar word wel aanbeveel vir ekstra akkuraatheid. Die skatter is op ’n mikroverwerker met intydse Linux in werking gestel. Die suksesvolle werking van die stelsel is deur middel van hardeware-geïntegreerde simulasie en werklike vlugtoetse aangetoon.

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Kreider, Marc Alan. "A numerical investigation of the global stability of ship roll : invariant manifolds, Melnikov's method, and transient basins /." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-03142009-040740/.

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Swahn, Inger, and Anneli Forsum. "Sjuksköterskors uppfattning om omvårdnadshandledning." Thesis, Jönköping University, HHJ, Dep. of Nursing Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1672.

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Анотація:

Handledaren är en nyckelperson i studenternas utveckling till professionella sjuksköterskor. Syftet med denna studie var att undersöka och beskriva sjuksköterskors uppfattning om omvårdnadshandledning av sjuksköterskestudenter. Fokusgruppsintervjuer valdes som metod. Nitton sjuksköterskor deltog i intervjuerna. Materialet bearbetades. Två huvudkategorier formulerades: Egenskaper och Kompetens med ett övergripande tema: Handledningens kvalitet. I resultatet av intervjuerna framkom faktorer som har betydelse för en god handledning och utveckling av handledarrollen: handledarens- studentens och organisationens egenskaper samt pedagogisk- yrkes och social kompetens. Det framkom att viktiga kvaliteter både hos handledare och student är intresse och motivation samt ett gemensamt ansvar för studenternas lärande. Det efterfrågas faktorer som tid och acceptans för handledning från organisationen. En professionell sjuksköterska som är en bra förebild för studenten och har en god pedagogisk kompetens är bra handledare. För att kunna utvecklas i sin handledarroll efterlyser sjuksköterskorna feedback från sina studenter. Uppfattningen var att det är roligt att vara handledare och att det är en tillfredsställelse att lyckas föra en människa framåt i sitt lärande.

The preceptor is a key person in the students development to professional nurses. The purpose with this study was to examine and describe how nurses thinking of the preceptor ship for nurse students. Focus group interviews were chosen as method. Nineteen nurses participated in the interviews. The interviews were analysed. Two main categories were developed: Characteristics and Competence with a comprehensive theme regarding the nurses understanding of the quality of preceptor ship. The result of interviews showed factors of significance for the quality and development of the preceptor ship role: the preceptor, students and the organisations characteristics as well as pedagogical, professional and social competence. It was made clear that the interest and motivation as well as a mutual responsibility for the students learning is important qualities for both the preceptor and the student. Preceptors requested factors such as time and acceptance for preceptor ship from the organisation. A good preceptor is a professional nurse that is a good model for students and has a well developed pedagogical competence. To be able to develop one’s role as a preceptor, nurses are making inquiries about feedback from their students. The opinion of the preceptors was that it is amusing to be a preceptor and that it is satisfactory to succeed in leading a human forward in her development.

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Teichman, Jason A. "Automated Sea State Classification from Parameterization of Survey Observations and Wave-Generated Displacement Data." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2199.

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Sea state is a subjective quantity whose accuracy depends on an observer’s ability to translate local wind waves into numerical scales. It provides an analytical tool for estimating the impact of the sea on data quality and operational safety. Tasks dependent on the characteristics of local sea surface conditions often require accurate and immediate assessment. An attempt to automate sea state classification using eleven years of ship motion and sea state observation data is made using parametric modeling of distribution-based confidence and tolerance intervals and a probabilistic model using sea state frequencies. Models utilizing distribution intervals are not able to exactly convert ship motion data into various sea states scales with significant accuracy. Model averages compared to sea state tolerances do provide improved statistical accuracy but the results are limited to trend assessment. The probabilistic model provides better prediction potential than interval-based models, but is spatially and temporally dependent.

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Agarwal, Richa. "Network design and alliance formation for liner shipping." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-07082007-213229/.

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Thesis (Ph. D.)--Industrial and Systems Engineering, Georgia Institute of Technology, 2008.
Professor Michael D. Meyer, Committee Member ; Professor Ozlem Ergun, Committee Chair ; Professor Ellis Johnson, Committee Member ; Professor George L. Nemhauser, Committee Member ; Professor H. Venkateswaran, Committee Member.

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Linde, Florian. "3D modelling of ship resistance in restricted waterways and application to an inland eco-driving prototype." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2389/document.

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Les travaux de cette thèse ont pour but de développer un prototype d’éco-pilote, nommé EcoNav, permettant d’optimiser la vitesse d’un bateau afin de réduire sa consommation de carburant. EcoNav est composé de plusieurs modules dont : un modèle hydraulique 2D simulant l’écoulement hydrodynamique (vitesse du courant et hauteur d’eau) le long du trajet du bateau; - un modèle de résistance à l’avancement servant à alimenter un modèle de prédiction de la consommation de carburant; - un algorithme d’optimisation permettant de trouver le profil optimal de vitesse. Afin de pouvoir estimer la consommation de carburant, un modèle numérique de la résistance à l’avancement en milieu confiné a été développé durant la première partie de cette thèse. Ce modèle numérique 3D simule l’écoulement du fluide autour du bateau et permet de calculer les forces agissant sur sa coque. La résolution des équations RANS est couplée avec un algorithme de quasi-Newton afin de trouver la position d’équilibre du bateau et calculer son enfoncement. Cette méthode est validée en comparant les résultats numériques avec des résultats expérimentaux issus d’essais en bassin de traction. L’influence de l’enfoncement sur la résistance à l’avancement et la précision de la méthode est étudiée en comparant les résultats numériques obtenus avec et sans enfoncement. La précision des modèles empiriques de prédiction de la résistance à l’avancement est également comparée à celle du modèle numérique. Enfin, le modèle numérique est utilisé afin de déterminer si le confinement en largeur ou en profondeur ont une influence identique sur l’augmentation de résistance à l’avancement. Les résultats de cette étude permettent d’établir si le confinement de la voie d’eau peut être caractérisé à l’aide d’un paramètre unique (coefficient de blocage par exemple) ou bien deux paramètres permettant de distinguer le confinement latéral et vertical. Dans la seconde partie de cette thèse, les méthodes numériques utilisées pour le modèle d’éco-pilote sont décrites et comparées afin de sélectionner celles qui sont le plus adaptées à chaque module. EcoNav est ensuite utilisé afin de modéliser un cas réel : celui du bateau automoteur Oural navigant sur la Seine entre Chatou et Poses (153 km). La consommation optimisée est comparée à la consommation non optimisée, calculée à partir des vitesses AIS observées sur le tronçon étudié. L’influence de la trajectoire du bateau et de son temps de parcours sur sa consommation sont également étudiés. Les résultats de ces investigations ont montré qu’optimiser la vitesse du bateau permet d’obtenir une réduction de la consommation de carburant de l’ordre de 8 % et qu’optimiser la trajectoire du bateau ainsi que prendre en compte des informations en temps réel (disponibilité des écluses, trafic sur le fleuve) peuvent permettre de réaliser des économies de carburant supplémentaires
An eco-driving prototype, named EcoNav, is developed with the aim of optimizing a vessel speed in order to reduce fuel consumption for a given itinerary. EcoNav is organized in several modules : - a 2D hydraulic model simulating the flow conditions (current speed and water depth) along the itinerary; - a ship resistance model calculating the thrust necessary to counteract the hydrodynamic forces ; - a fuel consumption model calculating the fuel consumption corresponding to the thrust input; - a non linear optimization algorithm calculating the optimal speed profile. In order to evaluate the fuel consumption of an inland vessel, a ship resistance numerical model is developed in the first part of this PhD. This 3D numerical model simulates the flow around an inland self-propelled vessel and evaluates the hydrodynamic forces acting on the hull. A RANS solver is coupled with a quasi-Newton approach to find the equilibrium position and calculate ship sinkage. This method is validated by comparing the results of numerical simulations to towing tank tests. The numerical results with and without sinkage are also compared to study the influence of sinkage on ship resistance and on the accuracy of the method. Additionally, some empirical models are investigated and compared with the accuracy of the numerical method. Finally, the numerical model is used to determine if channel with and water depth restriction contribute to the same amount of ship resistance increase for the same level of restriction. The results of that investigation give insight to whether channel restriction can be characterized by a unique parameter (for instance the blockage ratio) or two parameters to distinguish water depth and channel with effects. In the second part of this PhD, the numerical methods used in the speed optimization model are described and validated. The speed optimization model is then used to simulate a real case: the itinerary of the self-propelled ship Oural on river Seine, between Chatou and Poses (153 km). The optimized fuel consumption is compared with the non-optimized fuel consumption, based on AIS speed profile retrieved on this itinerary. The effects of the ship trajectory and travel duration on fuel consumption are also investigated. The results of those investigations showed that optimizing the ship speed lead to an average fuel saving of 8 % and that using an optimal track and including real time information such as lock availability and river traffic can lead to additional fuel savings

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To, Suk-kwan. "The effectiveness of a reading module in enhancing junior students' reading motivation and conceptual knowledge Ti sheng chu zhong xue sheng yue du dong ji ji wen hua zhi shi dan yuan jiao xue cheng xiao yan jiu /." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B40039985.

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Gomit, Guillaume. "Développement de techniques de mesure de surfaces libres par moyens optiques : Application à l'analyse de l'écoulement généré par un modèle de bateau en bassin des carènes." Phd thesis, Université de Poitiers, 2013. http://tel.archives-ouvertes.fr/tel-01062934.

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Анотація:

Le développement de techniques de mesure optiques de surfaces libres permettant la mesure des ondes générées par un modèle de navire en bassin des carènes est proposé dans ce mémoire. Trois méthodes, toutes basées sur un système de prises de vues stéréoscopiques, sont présentées. La première repose sur l'emploi de procédures d'inter-corrélation des images des caméras composant le système de stéréovision. La seconde s'appuie sur la théorie de la réfraction de la lumière au travers de l'interface air/eau. La troisième méthode est basée sur l'identification des projections de faisceaux laser sur la surface libre vue par un système stéréoscopique. Ces méthodes sont appliquées à la mesure du champ de vague autour d'un modèle de navire tracté dans le bassin des carène de l'Institut Pprime et dans un bassin des carènes de grande taille (B600 de la DGA Techniques hydrodynamique) et permettent la reconstruction et l'analyse du sillage. Les principales caractéristiques des champs de vagues et leurs dépendances au nombre de Froude sont étudiées en détail. Afin de compléter l'étude de l'écoulement généré par le modèle de navire, des mesures de PIV stéréoscopique autour de la carène, des mesures spécifiques de la vague d'étrave et des simulations numériques sont réalisées. L'ensemble de ces données permettent l'analyse de champs de vitesse tridimensionnelle proche de la coque et l'identification des caractéristiques du champ de vague de l'étrave jusqu'au champ lointain.

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Ploé, Patrick. "Surrogate-based optimization of hydrofoil shapes using RANS simulations." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0012/document.

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Cette thèse présente un framework d’optimisation pour la conception hydrodynamique de forme d’hydrofoils. L’optimisation d’hydrofoil par simulation implique des objectifs d’optimisation divergents et impose des compromis contraignants en raison du coût des simulations numériques et des budgets limités généralement alloués à la conception des navires. Le framework fait appel à l’échantillonnage séquentiel et aux modèles de substitution. Un modèle prédictif est construit en utilisant la Régression par Processus Gaussien (RPG) à partir des données issues de simulations fluides effectuées sur différentes géométries d’hydrofoils. Le modèle est ensuite combiné à d’autres critères dans une fonction d’acquisition qui est évaluée sur l’espace de conception afin de définir une nouvelle géométrie qui est testée et dont les paramètres et la réponse sont ajoutés au jeu de données, améliorant ainsi le modèle. Une nouvelle fonction d’acquisition a été développée, basée sur la variance RPG et la validation croisée des données. Un modeleur géométrique a également été développé afin de créer automatiquement les géométries d’hydrofoil a partir des paramètres déterminés par l’optimiseur. Pour compléter la boucle d’optimisation,FINE/Marine, un solveur fluide RANS, a été intégré dans le framework pour exécuter les simulations fluides. Les capacités d’optimisation ont été testées sur des cas tests analytiques montrant que la nouvelle fonction d’acquisition offre plus de robustesse que d’autres fonctions d’acquisition existantes. L’ensemble du framework a ensuite été testé sur des optimisations de sections 2Dd’hydrofoil ainsi que d’hydrofoil 3D avec surface libre. Dans les deux cas, le processus d’optimisation fonctionne, permettant d’optimiser les géométries d’hydrofoils et confirmant les performances obtenues sur les cas test analytiques. Les optima semblent cependant être assez sensibles aux conditions opérationnelles
This thesis presents a practical hydrodynamic optimization framework for hydrofoil shape design. Automated simulation based optimization of hydrofoil is a challenging process. It may involve conflicting optimization objectives, but also impose a trade-off between the cost of numerical simulations and the limited budgets available for ship design. The optimization frameworkis based on sequential sampling and surrogate modeling. Gaussian Process Regression (GPR) is used to build a predictive model based on data issued from fluid simulations of selected hydrofoil geometries. The GPR model is then combined with other criteria into an acquisition function that isevaluated over the design space, to define new querypoints that are added to the data set in order to improve the model. A custom acquisition function is developed, based on GPR variance and cross validation of the data.A hydrofoil geometric modeler is also developed to automatically create the hydrofoil shapes based on the parameters determined by the optimizer. To complete the optimization loop, FINE/Marine, a RANS flow solver, is embedded into the framework to perform the fluid simulations. Optimization capabilities are tested on analytical test cases. The results show that the custom function is more robust than other existing acquisition functions when tested on difficult functions. The entire optimization framework is then tested on 2D hydrofoil sections and 3D hydrofoil optimization cases with free surface. In both cases, the optimization process performs well, resulting in optimized hydrofoil shapes and confirming the results obtained from the analytical test cases. However, the optimum is shown to be sensitive to operating conditions

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Daniel, Aang. "Routing and Scheduling with Time Windows: Models and Algorithms for Tramp Sea Cargos and Rail Car-Blocks." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/19698.

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Анотація:

Thesis (Ph.D)--Industrial and Systems Engineering, Georgia Institute of Technology, 2007.
Committee Chair: Al-Khayyal, Faiz; Committee Member: Barnes, Earl; Committee Member: Johnson, Ellis; Committee Member: Karimi, IA; Committee Member: Sokol, Joel.

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Linder, Jonas. "Indirect System Identification for Unknown Input Problems : With Applications to Ships." Doctoral thesis, Linköpings universitet, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-134126.

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System identification is used in engineering sciences to build mathematical models from data. A common issue in system identification problems is that the true inputs to the system are not fully known. In this thesis, existing approaches to unknown input problems are classified and some of their properties are analyzed. A new indirect framework is proposed to treat system identification problems with unknown inputs. The effects of the unknown inputs are assumed to be measured through possibly unknown dynamics. Furthermore, the measurements may also be dependent on other known or measured inputs and can in these cases be called indirect input measurements. Typically, these indirect input measurements can arise when a subsystem of a larger system is of interest and only a limited set of sensors is available. Two examples are when it is desired to estimate parts of a mechanical system or parts of a dynamic network without full knowledge of the signals in the system. The input measurements can be used to eliminate the unknown inputs from a mathematical model of the system through algebraic manipulations. The resulting indirect model structure only depends on known and measured signals and can be used to estimate the desired dynamics or properties. The effects of using the input measurements are analyzed in terms of identifiability, consistency and variance properties. It is shown that cancelation of shared dynamics can occur and that the resulting estimation problem is similar to errors-in-variables and closed-loop estimation problems because of the noisy inputs used in the model. In fact, the indirect framework unifies a number of already existing system identification problems that are contained as special cases. For completeness, an instrumental variable method is proposed as one possibility for estimating the indirect model. It is shown that multiple datasets can be used to overcome certain identifiability issues and two approaches, the multi-stage and the joint identification approach, are suggested to utilize multiple datasets for estimation of models. Furthermore, the benefits of using the indirect model in filtering and for control synthesis are briefly discussed. To show the applicability, the framework is applied to the roll dynamics of a ship for tracking of the loading conditions. The roll dynamics is very sensitive to changes in these conditions and a worst-case scenario is that the ship will capsize. It is assumed that only motion measurements from an inertial measurement unit (IMU) together with measurements of the rudder angle are available. The true inputs are thus not available, but the measurements from the IMU can be used to form an indirect model from a well-established ship model. It is shown that only a subset of the unknown parameters can be estimated simultaneously. Data was collected in experiments with a scale ship model in a basin and the joint identification approach was selected for this application due to the properties of the model. The approach was applied to the collected data and gave promising results.
Till skillnad från många andra industrier där avancerade styrsystem har haft en omfattande utveckling under de senaste decennierna så har styrsystem för skepps- och marinindustrin inte alls utvecklats i samma utsträckning. Det är framförallt under de senaste 10 åren som lagkrav och stigande driftskostnader har ökat intresset för effektivitet och säkerhet genom användning av styrsystem. Rederier och den marina industrin är nu intresserade av hur de avancerade styrsystem som används inom andra områden kan tillämpas för marina ändamål. Huvudmålet är typiskt att minska den totala energianvändningen, och därmed också bränsleförbrukningen, genom att hela tiden planera om hur skeppet skall användas med hjälp av ny information samt styra skeppet och dess ingående system på ett sätt som maximerar effektiviteten. För många av dessa avancerade styrsystem är det grundläggande att ha en god förståelse för beteendet hos det systemet som skall styras. Ofta används matematiska modeller av systemet för detta ändamål. Sådana modeller kan skapas genom att observera hur systemet reagerar på yttre påverkan och använda dessa observationer för att finna eller skatta den modell som bäst beskriver observationerna. Observationerna är mätningar som görs med så kallade sensorer och tekniken att skapa modeller från mätningarna kallas för systemidentifiering. Detta är i grunden ett utmanande problem och det kan försvåras ytterligare om de sensorer som behövs inte finns tillgängliga eller är för dyra att installera. I denna avhandling föreslås en ny teknik där de mätningar som finns tillgängliga används på ett nytt och annorlunda sätt. Detta kan minska mängden nödvändiga sensorer eller möjliggöra användandet av alternativa sensorer i modell-framtagningen. Med hjälp av denna nya teknik kan enkla sensorer användas för att skatta en matematisk modell för en del av skeppet på ett sätt som inte är möjligt med traditionella metoder. Genom att skatta denna modell kan fysikaliska egenskaper hos skeppet, så som dess massa och hur massan är fördelad över skeppet, övervakas för att upptäcka förändringar. Just dessa två egenskaper har stor inverkan på hur skeppet beter sig och om skeppet är fellastat kan det i värsta fall kapsejsa. Vetskapen om dessa fysikaliska egenskaper kan alltså utöver effektivisering användas för att varna besättningen eller påverka styrsystemen så att farliga manövrar undviks. För att visa att tekniken fungerar i verkligheten har den använts på mätningar som har samlats in från ett skalenligt modellskepp. Experimenten utfördes i bassäng och resultaten visar att tekniken fungerar. Denna nya teknik är inte specifik för marint bruk utan kan också vara användbar i andra typer av tillämpningar. Även i dessa tillämpningar möjliggörs användandet av färre eller alternativa sensorer för att skatta modeller. Tekniken kan vara speciellt användbar när en modell av ett system eller process som verkar i ett nätverk av många system är av intresse, något som också diskuteras i avhandlingen.

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Зайцев, В. В. "Наукові основи ефективного транспортування стиснутого природного газу морськими акваторіями". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2013. http://elar.nung.edu.ua/handle/123456789/4625.

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Анотація:

Дисертація присвячена вирішенню важливої народногосподарської проблеми - швидкому альтернативному постачанню природного газу до України. Мета дослідження - розробка наукових основ ефективного транспортування стиснутого природного газу морськими акваторіями за допомогою спеціальних суден-газовозів, суден-контейнеровозів та барж. У дисертаційній роботі вперше розроблено концепцію транспортування стиснутого природного газу за допомогою спеціалізованих контейнеровозів, рухомих трубопроводів на баржах, на суднах на повітряній подушці і за допомогою підводного носія рухомого трубопроводу. Вперше розроблено комплексні основи проектування і розрахунків елементів CNG-мoдyлiв. Доведено, що для CNG-газовозів доцільно використовувати балони, виготовлені з полімерних матеріалів, що збільшує частку маси газу в загальній масі балона у порівнянні з металевими балонами.
Диссертация посвящена решению важной народнохозяйственной проблемы - быстрого альтернативного снабжения Украины природным газом. Цель исследования - разработка научных основ эффективной транспортировки сжатого природного газа морскими акваториями с помощью специальных судов-газовозов, судов-контейнеровозов и барж. Методы исследования приняты аналитические и численные. Ожидаемый годовой экономический эффект составляет 500...700 млн. дол. США. Установлено, что на сегодня отсутствуют результаты теоретических исследований о транспортировке сжатого природного газа с помощью подвижных трубопроводов на судах-носителях, публикации по определению технико-экономических показателей подвижных трубопроводов, расчетные эксперименты, позволяющие выявлять особенности процесса нагружения подвижного трубопровода внутренним давлением от транспортируемого сжатого газа. Отсутствуют на сегодня как теоретические, так и экспериментальные работы, которые бы позволили исследовать НДС подвижных трубопроводов и их элементов. Исследованы такие задачи: проведение анализа методов транспортировки природного газа морскими акваториями; разработка теоретико-методологических принципов формирования технологий транспортировки сжатого природного газа через морские акватории и концептуальных решений такой транспортировки судами-контейнеровозами, баржами и носителями на воздушной подушке; разработка основ расчетов и проектирования элементов подвижных трубопроводов для транспортировки сжатого газа; разработка основ расчетов и проектирования CNG-модулей с баллонами высокого давления и исследование их массогабаритных характеристик; разработка принципов размещения модулей на судах и их объединения в подвижный трубопровод; разработка основ расчетов и проектирования судов-носителей подвижных трубопроводов, их устройств и систем; проведение экономической оценки системы морской транспортировки сжатого природного газа с использованием контейнеровозов и барж. В диссертационной работе впервые разработана концепция транспортировки сжатого природного газа с помощью специализированных контейнеровозов, подвижных трубопроводов на барже, на СВП и с помощью подводного носителя подвижного трубопровода. Впервые разработаны комплексные основы проектирования и расчетов элементов CNG-мoдyлeй, в том числе коническо-цилиндрических и коническо-сферических. Доказано, что для CNG-газовозов целесообразно использовать баллоны, изготовленные из композиционных полимерных материалов, что увеличивает долю массы природного газа в общей массе баллона с газом по сравнению с металлическими баллонами. Практическое значение исследований определяется тем, что математические модели, методы расчетов и проектирования подвижных трубопроводов, полученные в работе результаты, могут быть использованы не только для контейнеровозов, барж, но и для других типов носителей подвижных трубопроводов. Использование полученных в работе результатов исследований, а именно, методов расчетов прочности элементов подвижных трубопроводов, методов для анализа процесса транспортировки CNG с помощью подвижного трубопровода, НДС элементов подвижного трубопровода с помощью МКЭ дают возможность инженерам, конструкторам, проектировщикам и студентам проводить анализы прочности подвижных трубопроводов, а также выявлять и использовать их резервы прочности, конструировать и строить подвижные трубопроводы на основе достоверных и современных методов. Приведены практические рекомендации по проектированию и эксплуатации подвижных трубопроводов и их носителей и элементов. Достоверность результатов исследований подтверждена корректным применением соответствующих методов научных исследований, к которым относятся: теория тонких оболочек, теория мягких оболочек и метод конечных элементов, соответствием результатов расчетов проведенных с помощью аналитических методик результатам, полученными с помощью МКЭ.
Dissertation is dedicated to important National Economy problem - rapid alternative natural gas supply of Ukraine. The purpose of research - development of scientific bases for effective transportation of compressed natural gas through marine areas with the help of special gas carriers, container ships and barges. In dissertational work first time developed the concept of transporting CNG by container ships, movable pipelines on a barges, on hovercrafts and using underwater carrier of movable pipeline. The first time developed the foundations of design and analysis of elements of CNG-modules. It is proved that for CNG-gas carriers advisable to use cylinders made from polymer materials, which increases the proportion of the mass of gas to the total weight of cylinder as compared to metal cylinders.

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36

Rizvi, Syed. "Physical and computational models of the gloss exhibited by the human hair tress : a study of conventional and novel approaches to the gloss evaluation of human hair." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/physical-and-computational-models-of-the-gloss-exhibited-by-the-human-hair-tress-a-study-of-conventional-and-novel-approaches-to-the-gloss-evaluation-of-human-hair(feba6616-b83c-4a03-83f6-32c8b7009cc8).html.

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The evaluation of the gloss of human hair, following wet/dry chemical treatments such as bleaching, dyeing and perming, has received much scientific and commercial attention. Current gloss analysis techniques use constrained viewing conditions where the hair tresses are observed under directional lighting, within a calibrated presentation environment. The hair tresses are classified by applying computational models of the fibres' physical and optical attributes and evaluated by either a panel of human observers, or the computational modelling of gloss intensity distributions processed from captured digital images. The most popular technique used in industry for automatically assessing hair gloss is to digitally capture images of the hair tresses and produce a classification based upon the average gloss intensity distribution. Unfortunately, the results from current computational modelling techniques are often found to be inconsistent when compared to the panel discriminations of human observers. In order to develop a Gloss Evaluation System that produces the same judgements as those produced from both computational models and human psychophysical panel assessments, the human visual system has to be considered. An image based Gloss Evaluation System with gonio-capture capability has been developed, characterised and tested. A new interpretation of the interaction between reflection bands has been identified on the hair tress images and a novel method was developed to segment the diffuse, chroma and specular regions from the image of the hair tress. A new model has been developed, based on Hunter's contrast gloss approach, to quantify the gloss of the human hair tress. Furthermore, a large number of hair tresses have been treated with a range of hair products to simulate different levels of hair shine. The Tresses have been treated with different commercial products. To conduct a psychophysical experiment, one-dimensional scaling paired comparison test, a MATLAB GUI (Graphical user interface) was developed to display images of the hair tress on calibrated screen. Participants were asked to select the image that demonstrated the greatest gloss. To understand what users were attending to and how they used the different reflection bands in their quantification of the gloss of the human hair tress, the GUI was run on an Eye-Tracking System. The results of several gloss evaluation models were compared with the participants' choices from the psychophysical experiment. The novel gloss assessment models developed during this research correlated more closely with the participants' choices and were more sensitive to changes in gloss than the conventional models used in the study.

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37

Erny, Carole. "Prévision de l'amorçage de fissures de fatigue dans des assemblages soudés pour applications navales." Brest, 2010. http://www.theses.fr/2010BRES2063.

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Les structures navales sont classiquement assemblées par soudage et demeurent soumises en service à des chargements variables et complexes. Le procédé de soudage entraîne l’apparition de géométries particulières en pied de cordon générant des concentrations de contraintes locales et des variations de propriétés mécaniques au sein de la zone affectée thermiquement. Les joints soudés représentent alors des sites privilégiés d’endommagement par fatigue. Dans un précédent travail, une méthodologie destinée à estimer la durée de vie en fatigue a été développée et mise en œuvre sur des joints soudés bout à bout. Ce présent travail s’attache cette fois à des assemblages plus complexes afin de valider cette méthode et calculer la durée de vie de structures destinées à des applications navales. Tout d’abord, cette méthode repose sur l’étude de l’adaptation élastique de la structure suivie d’un post-traitement destiné à la prévision de la durée de vie à l’amorçage. Une comparaison entre résultats expérimentaux et numériques est proposée et permet de conclure sur la validité de la stratégie proposée pour calculer la durée de vie en fatigue d’assemblages soudés représentatifs de structures industrielles
Ship structures are usually built by using welding process and are submitted to some variable and complex loadings. The welding process induces specific geometries at the weld toe where local stress concentrations are generated and also creates various mechanical properties in the heat affected zone. Accordingly, welded joints could be a critical area for fatigue damage. In a previous work, a methodology to predict fatigue life has been developed and tested on butt-welded joints. To go further, the present work focuses on more complex assemblies in order to validate this strategy and be able to estimate the fatigue life of representative ship structures. First, the methodology consists of the elastic shakedown study of the structure and then of a post-treatment which predicts the fatigue crack initiation. A comparison between experimental and numerical results is proposed in order to present the accuracy of the proposed strategy to predict fatigue life time of welded assemblies typical of shipbuilding applications

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38

Suphaphiphat, Karunasinee. "Anti-viral immune response in the semen of cynomolgus macaques and inhibition of cell to cell transmission by broadly neutralizing antibodies in an SIV/SHIV model of infection SHIV162P3 transmission by semen 1 leukocytes is efficiently 2 inhibited by broadly neutralizing antibodies." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS599.

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La transmission sexuelle du VIH-1 se fait principalement via du sperme infecté contaminé, contenant à la fois des virions libres et des leucocytes infectés. Les facteurs présents dans le liquide séminal peuvent aussi moduler l’infectivité du sperme et la réponse immunitaire de l’hôte. Ainsi, le macaque infecté par le virus de l’immunodéficience simienne (VIS) sera utilisé comme modèle expérimental afin d’étudier l’infectivité des cellules séminales, les réponses immunitaires anti-virales et évaluer l’effet inhibiteur d’anticorps neutralisant à large spectre (bNAbs) sur la transmission du virus intercellulaire (TVI).Chez les macaques infectés avec le SIVmac251, les réponses immunitaires innées et adaptatives spécifiques du VIS ont été étudiées dans le sperme, en se focalisant sur les réponses T CD8, humorale et sur l’expression des cytokines, chimiokines et facteurs de croissance. L’infection VIS induit l’expression de cytokines pro-inflammatoires et immuno-régulatrices dans le sperme concordant avec une augmentation des cellules activées T CD8+ CD69+ et T CD8+ CXCR3+ CCR5+. Ni les cellules T CD8+ spécifiques du VIS, ni la réponse humorale ne permettent le contrôle de la dissémination du virus dans le sperme. L’absence de contrôle de la réplication virale dans le sperme infecté VIS est associée à une inflammation générale et à une activation immunitaire, pouvant refléter ce qui se produit dans le tractus reproducteur masculin, et qui pourrait mener à l’augmentation de la transmission VIH-1/VIS.De plus, nous avons développé un modèle d’étude in vitro de TVI en utilisant soit la lignée cellulaire TZM-bl, soit des PBMC humains comme cellules cibles, et des splénocytes ou des leucocytes CD45+ du spermes infectés avec le SHIV163P3 comme cellules infectieuses. Ce modèle nous a permis d’évaluer l’inhibition de TVI par des bNAbs. Nous avons testé 4 bNabs de 1ère génération et 8 bNabs de 2nde génération. La combinaison de bNabs de 1ère génération (2F5 + 2G12 + 4E10) permet d’inhiber TVI, alors qu’en combinaison double ou seule, aucune inhibition de la transmission n’est observée. Cependant, les bNabs de 2nde génération peuvent, seules, induire une inhibition de TVI aussi efficacement qu’en combinaison. Ainsi, un bNabs de 2nde génération anti-V3 a été sélectionné afin de tester son effet inhibiteur de TVI dans un modèle in vivo
HIV-1 sexual transmission occurs mostly through contaminated semen, which contains both free virions and infected leukocytes. Moreover, factors in seminal plasma (SP) can influence both semen infectivity and host’s response. Therefore, we used the experimental model of Simian Immunodeficiency Virus (SIV) infection of macaques, to investigate semen cells infectivity and the antiviral immune responses and to evaluate the potency of broadly neutralizing antibodies (bNAbs) to block cell-to-cell virus transmission.In SIVmac251 infected cynomolgus macaques, we investigated SIV-specific innate and adaptive responses in semen, including CD8+ T cell response, humoral response and levels of cytokines, chemokines and growth factors. SIV infection induced pro-inflammatory and immunoregulatory cytokines in semen and a concomitant upregulation of activated CD69+ CD8+ T cells and CCR5+ CXCR3+ CD8+ T cells. Neither SIV-specific CD8+ T-cell responses nor humoral responses controlled seminal viral shedding. Failure to control viral replication in SIV-infected semen is related to a general inflammation and immune activation, which possibly mirrors what happen in the male genital tract and which could lead to enhanced HIV/SIV transmission.Moreover, we developed cell-to-cell transmission assays, using either TZM-bl or human PBMC as target cells and SHIV162P3-infected splenocytes and CD45+ semen leukocytes as donor cells, and evaluated bNAbs-mediated inhibition. The bNAb panel included four 1st generation bNAbs and eight 2nd generation bNAbs. A combination of 1st generation bNAbs (2F5+2G12+4E10) was able to efficiently inhibit CAV transmission, while double combination or single bNAbs showed reduced potency. Of note, individual 2nd generation bNAbs inhibited transmission as efficiently as bNAbs combinations. An anti-V3 bNAb has been selected to evaluate its potential to block cell-to-cell transmission in vivo

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39

Robert, Marie. "Modélisation numérique du comportement hydroélastique des navires sur houle non linéaire." Thesis, Ecole centrale de Nantes, 2017. http://www.theses.fr/2017ECDN0047.

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Avec l’accroissement de la taille des navires marchands de type porte-conteneurs, les interactions entre la réponse de tenue à la mer classique et la réponse structurelle sont de plus en plus présentes. Les fréquences propres de réponse structurelle de la poutre navire se rapprochent des fréquences de houle océaniques. La modélisation des interactions houlestructure devient un enjeu clé dans les étapes de design par les architectes et de validation par les sociétés de classification. Dans ce contexte, on se propose de développer un nouvel outil d’interaction fluide-structure associant une modélisation RANSE de l’écoulement en différences finies sous ICARE-SWENSE, code développé conjointement par le LHEEA et la société HydrOcéan, et un modèle de poutre analytique, le tout dans le cadre d’une approche modale. Grâce à l’emploi d’une formulation simple pour le traitement de la structure, l’outil de couplage hydroélastique sur houle hérite des propriétés de tolérance aux grands pas de temps d’ICARE-SWENSE, tout en prenant en compte les effets hydrodynamiques non linéaires. Les résultats présentés sur des cas de barge en diffraction et en radiation suivant les modes de déformation élastique permettent de valider les premières étapes de la mise en place du couplage. Une attention particulière est portée sur les seuils d’apparition des non linéarités de l’écoulement et leur impact sur la réponse structurelle. Une première implémentation est proposée pour la résolution du modèle libre des modes élastiques. Des études paramétriques de résistance ajoutée sur houle régulière et bichromatique viennent compléter les travaux dans la perspective de futurs calculs sur houle irrégulière
The increase of large ships dimensions shifts their structural natural frequencies towards common wave frequencies, inducing more interactions between the classic seakeeping response and the structural response. Accurate modeling of wavestructure interactions becomes a key issue for architects and classification societies during the design of a ship. In this respect, a new numerical tool for fluidstructure interaction is developed, combining a finite difference RANSE description of the fluid domain with ICARE-SWENSE and an analytic beam model, within a modal approach. Thanks to the use of a simple formulation for the structure part, the tool inherits ICARE-SWENSE tolerance properties with regard to large time steps, while still taking into account hydrodynamic nonlinear effects. Results presented for a flexible barge in diffraction and radiation according to flexible modes validate the first steps of the coupling procedure. Special consideration is given to hydrodynamic non linearities threshold and their impact on the structural response. A first implementation is shown for the resolution of the equation of motion for the elastic degrees of freedom. Parametric studies on ship resistance in both regular and bichromatic waves are included as a stepping stone towards future simulations of ship hydroelasticity in irregular waves

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40

Linot, Fabrice. "Apport des Surfaces à Haute Impédance à la conception d'antennes réseaux compactes et d'antennes réseaux à très large bande passante." Phd thesis, Télécom ParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-00617270.

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La technologie des antennes réseaux occupe une place croissante dans les applications aéroportées modernes militaires et civiles car elle offre des performances radioélectriques et des capacités d'intégration aux porteurs inenvisageables avec d'autres technologies. Ces performances sont couplées à des contraintes liées au couplage entre éléments rayonnants ou en termes d'intégration sur des petits porteurs. Ces deux contraintes peuvent être palliées à l'aide de surfaces à haute impédance (SHI) pouvant traduire le comportement d'un conducteur magnétique artificiel et/ou la capacité à interdire la propagation des ondes de surface dans une bande de fréquence. Les travaux présentés dans ce manuscrit ont pour objectif de présenter l'apport des SHI sur la conception de réseaux compacts et d'antennes réseaux ultra large bande. Après une introduction aux SHI, une présentation de modèles analytiques, numériques et expérimentaux a été présentée. Une partie des travaux est consacrée à l'étude du couplage mutuel entre deux antennes imprimées espacées l'une de l'autre d'une demi-longueur d'onde. Par la suite les différentes contributions apportées par les SHI, lorsqu'elles sont employées comme réflecteur, sur une antenne réseau ultra large bande sont montrées. Une modélisation analytique de l'antenne réseau placée au-dessus de réflecteurs à haute impédance est validée par des simulations numériques. Les SHI montrent qu'il est possible de créer des bandes passantes supplémentaires instantanées et agiles en fréquences permettant d'augmenter la bande passante initiale de l'antenne réseau. De plus elles permettent de réduire considérablement l'encombrement et d'obtenir une bande agile unique.

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41

Zouaoui-Elloumi, Salma. "Reconnaissance de comportements de navires dans une zone portuaire sensible par approches probabiliste et événementielle : application au Grand Port Maritime de Marseille." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2012. http://pastel.archives-ouvertes.fr/pastel-00737678.

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Cette thèse s'est déroulée dans le cadre du projet SECMAR qui visait à sécuriser le Grand Port Maritime de Marseille. Notre objectif était d'aider les personnels du port à identifier les comportements menaçant des navires afin de pouvoir agir efficacement en cas de danger réel. A ce titre, nous avons développé un système d'analyse et de reconnaissance de comportements de navires formé de deux sous-modules complémentaires. Le premier est construit à partir de l'approche probabiliste Modèle de Markov Cachée et traite principalement des comportements nominaux des gros bateaux qui se caractérisent par un déplacement régulier et récurrent dans le port. Le second est construit à partir du langage réactif synchrone Esterel et prend en compte les comportements agressifs et transgressifs de tous types de navires, notamment ceux des petits bateaux qui circulent librement et aléatoirement dans le port. Le système global d'aide à la décision a permis une bonne reconnaissance en temps-réel des différents comportements de navires au cours de leurs évolutions dans le port. Au regard des résultats prometteurs que nous avons obtenu à travers ce module, il est envisageable de le généraliser à d'autres ports mondiaux ainsi qu'à d'autres domaines d'application, notamment le domaine aéroportuaire.

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42

Chiu, Yi-Ming, and 邱意明. "Application of Wireless Transmission Module to the Measurement of Ship Motions." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/40215435391642194866.

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碩士
國立臺灣大學
工程科學及海洋工程學研究所
97
The purpose of this research is to investigate the feasibility of application of wireless transmission module to the measurement of ship motions. This research includes collocation and design of the wireless transmission module and the sensors, as well as the establishment of wireless communication mode. C programming language is used to control the micro-controller MSP430F1611, and the design of structure in wireless transmission module. Star topology is used as the frame of wireless communication to the measurement of ship motions. The wired measurement system might disturb the operation of crew. By the design of wireless transmission methods improve the problem just mentioned before.

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43

Hopkins, Dwayne H. "Ship/model correlation study /." 2003.

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44

YA-LING, CHEN, and 陳雅玲. "Create Champions Cradle of Taiwan High School Soccer：The Training Management Module Case Studies in Chung Shan Industrial and Commercial School Women's Soccer Team." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/bbn334.

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碩士
康寧大學
休閒管理研究所
104
The soccer is most popular sport and common language in the world, Asian teams unable to reach top three of FIFA World Cup, Taiwan team more difficult to achieve the target, Taiwan soccer sport obviously being neglected compared to the other sport. In Taiwan Mulan women's soccer team had let soccer become the trend in the 70 's ,Because no players and lack of funds and government neglect and social factors, resulting Mulan women's soccer team was to halt recruitment. Now, in the world ranking Taiwan's women's soccer better than men's soccer but trend biased towards males. must rectify the defects from basic education. This paper uses qualitative field research methods, through interviews and case study on successful experiences in the training model and team management. This paper provides recommendations for basic training school on how to train soccer players, according to the times of changing into different management models and methods. A case in this thesis is often won the championship trophy women's soccer team of the Chung Shan Industrial and Commercial School the case has gone through a lot of difficulties but never give up and continue to overcome all difficulties. It received three League Championship trophies in five years. became champions cradle of Taiwan High School women's Soccer team. This paper will hope remind the Government attaches Taiwan's soccer environment, promote the professionalization of women's soccer development in the country and finally towards the international forward.

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45

Woo, Jae-Kyung. "Gerber-Shiu analysis in some dependent Sparre Andersen risk models." Thesis, 2010. http://hdl.handle.net/10012/5343.

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In this thesis, we consider a generalization of the classical Gerber-Shiu function in various risk models. The generalization involves introduction of two new variables in the original penalty function including the surplus prior to ruin and the deficit at ruin. These new variables are the minimum surplus level before ruin occurs and the surplus immediately after the second last claim before ruin occurs. Although these quantities can not be observed until ruin occurs, we can still identify their distributions in advance because they do not functionally depend on the time of ruin, but only depend on known quantities including the initial surplus allocated to the business. Therefore, some ruin related quantities obtained by incorporating four variables in the generalized Gerber-Shiu function can help our understanding of the analysis of the random walk and the resultant risk management. In Chapter 2, we demonstrate the generalized Gerber-Shiu functions satisfy the defective renewal equation in terms of the compound geometric distribution in the ordinary Sparre Andersen renewal risk models (continuous time). As a result, forms of joint and marginal distributions associated with the variables in the generalized penalty function are derived for an arbitrary distribution of interclaim/interarrival times. Because the identification of the compound geometric components is difficult without any specific conditions on the interclaim times, in Chapter 3 we consider the special case when the interclaim time distribution is from the Coxian class of distribution, as well as the classical compound Poisson models. Note that the analysis of the generalized Gerber-Shiu function involving three (the classical two variables and the surplus after the second last claim) is sufficient to study of four variable. It is shown to be true even in the cases where the interclaim of the first event is assumed to be different from the subsequent interclaims (i.e. delayed renewal risk models) in Chapter 4 or the counting (the number of claims) process is defined in the discrete time (i.e. discrete renewal risk models) in Chapter 5. In Chapter 6 the two-sided bounds for a renewal equation are studied. These results may be used in many cases related to the various ruin quantities from the generalized Gerber-Shiu function analyzed in previous chapters. Note that the larger number of iterations of computing the bound produces the closer result to the exact value. However, for the nonexponential bound the form of bound contains the convolution involving usually heavy-tailed distribution (e.g. heavy-tailed claims, extreme events), we need to find the alternative method to reinforce the convolution computation in this case.

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46

Pothina, Dharhas. "A multimodel approach to modeling bay circulation in shallow bay-ship channel systems." 2009. http://hdl.handle.net/2152/17394.

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Numerical modeling of shallow microtidal semi-enclosed estuaries requires the effective simulation of physical processes with a wide range of temporal and spatial scales. In theory, application of sufficient grid resolution in both the horizontal and vertical should result in a reasonable simulation. However, in practice, this is not the case. Fully resolving the finest scales can be computationally prohibitive, and various algorithmic assumptions can break down at fine resolutions, leading to spurious oscillations in the solution. One method of simulating inherently cross-scale phenomena is to use multimodel approaches in which domain decomposition is used to divide the region into multiple subregions, each modeled by different submodels. These submodels are coupled to simulate the entire system efficiently. In general, the different models may involve different physics, they may be dimensionally heterogeneous or they may be both physically and dimensionally heterogeneous. A reduction in computational expense is obtained by using simpler physics and/or a reduced dimension model in the submodels. In this research, we look at the particular case of modeling shallow bays containing narrow, deep ship channels. In order to accurately model bay circulation, a model should capture the effect of these spatially localized navigational channels. Our research shows that modeling techniques currently used to simulate such systems using 2 dimensional or coarse resolution 3 dimensional estuary models misrepresent wind driven surface circulation in the shallow bay and tide driven volume fluxes through the channel. Fully resolving the geometry of the ship channel is impractical on all but large parallel computing clusters. We propose a more efficient method using the multimodel approach. This approach splits the estuary into a shallow bay region and a subsurface ship channel region. By separating the physical domain into two parts in this way, simpler models can be used that are targeted at the different physical processes and geometries dominant in each region. By using a low resolution 3D model (SELFE) in the shallow bay region, coupled through appropriate interface conditions with a 2D laterally averaged model, the effects of the ship channel on bay circulation are accurately represented at a fraction of the computational expense. In this research, this coupled model was developed and applied to an ideal shallow bay- ship channel system. The coupled model approach is found to be an effective strategy for modeling this type of system.
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47

"A hedonic price model for commodity housing in Guang Zhou, China." 2001. http://library.cuhk.edu.hk/record=b5890742.

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Yu Qing.
Thesis submitted in: November 2000.
Thesis (M.Phil.)--Chinese University of Hong Kong, 2001.
Includes bibliographical references (leaves 65-68).
Abstracts in English and Chinese.
Acknowledgements --- p.i
Abstract --- p.ii
摘要 --- p.iii
Table of Contents --- p.iv
List of Tables --- p.vi
List of Figures --- p.vi
Chapter Chapter 1 --- Introduction --- p.1
Chapter Chapter 2 --- Literature Review --- p.4
Chapter 2.1 --- Theoretical Model --- p.4
Chapter 2.2 --- Empirical Investigation --- p.9
Chapter 2.2.1 --- Choice of The Functional Form --- p.9
Chapter 2.2.2 --- Choice of Variables --- p.13
Chapter 2.2.3 --- Estimation of Supply and Demand Functions --- p.16
Chapter 2.2.4 --- Test of Heteroskedasticity --- p.17
Chapter 2.2.5 --- Test of Multicollinearity --- p.18
Chapter 2.2.6 --- Application of The Hedonic Price Model to Developing Countries --- p.20
Chapter 2.3 --- Concluding Remarks --- p.21
Chapter Chapter 3 --- Introduction of The Housing Market in Guang Zhou --- p.23
Chapter 3.1 --- Development and Current Situation --- p.23
Chapter 3.2 --- Some Caveats --- p.26
Chapter Chapter 4 --- Empirical Results --- p.30
Chapter 4.1 --- The Data --- p.30
Chapter 4.1.1 --- Dependent Variable --- p.34
Chapter 4.1.2 --- Locational Variables --- p.34
Chapter 4.1.3 --- Structural Variables --- p.35
Chapter 4.1.4 --- Neighbourhood Variables --- p.37
Chapter 4.2 --- The Results --- p.38
Chapter 4.2.1 --- Regression Results and Possible Interpretation --- p.40
Chapter 4.2.2 --- Test of Multicollinearity --- p.48
Chapter 4.2.3 --- Test of Heteroscedasticity --- p.50
Chapter 4.2.4 --- Test of Alternative Functional Forms --- p.55
Chapter 4.3 --- Possible Sources of Estimation Bias --- p.57
Chapter 4.4 --- Concluding Remarks --- p.59
Chapter Chapter 5 --- Conclusion --- p.61
References --- p.65

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48

Ben, Salah Zied. "Some Applications of Markov Additive Processes as Models in Insurance and Financial Mathematics." Thèse, 2012. http://hdl.handle.net/1866/9066.

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Cette thèse est principalement constituée de trois articles traitant des processus markoviens additifs, des processus de Lévy et d'applications en finance et en assurance. Le premier chapitre est une introduction aux processus markoviens additifs (PMA), et une présentation du problème de ruine et de notions fondamentales des mathématiques financières. Le deuxième chapitre est essentiellement l'article "Lévy Systems and the Time Value of Ruin for Markov Additive Processes" écrit en collaboration avec Manuel Morales et publié dans la revue European Actuarial Journal. Cet article étudie le problème de ruine pour un processus de risque markovien additif. Une identification de systèmes de Lévy est obtenue et utilisée pour donner une expression de l'espérance de la fonction de pénalité actualisée lorsque le PMA est un processus de Lévy avec changement de régimes. Celle-ci est une généralisation des résultats existant dans la littérature pour les processus de risque de Lévy et les processus de risque markoviens additifs avec sauts "phase-type". Le troisième chapitre contient l'article "On a Generalization of the Expected Discounted Penalty Function to Include Deficits at and Beyond Ruin" qui est soumis pour publication. Cet article présente une extension de l'espérance de la fonction de pénalité actualisée pour un processus subordinateur de risque perturbé par un mouvement brownien. Cette extension contient une série de fonctions escomptée éspérée des minima successives dus aux sauts du processus de risque après la ruine. Celle-ci a des applications importantes en gestion de risque et est utilisée pour déterminer la valeur espérée du capital d'injection actualisé. Finallement, le quatrième chapitre contient l'article "The Minimal entropy martingale measure (MEMM) for a Markov-modulated exponential Lévy model" écrit en collaboration avec Romuald Hervé Momeya et publié dans la revue Asia-Pacific Financial Market. Cet article présente de nouveaux résultats en lien avec le problème de l'incomplétude dans un marché financier où le processus de prix de l'actif risqué est décrit par un modèle exponentiel markovien additif. Ces résultats consistent à charactériser la mesure martingale satisfaisant le critère de l'entropie. Cette mesure est utilisée pour calculer le prix d'une option, ainsi que des portefeuilles de couverture dans un modèle exponentiel de Lévy avec changement de régimes.
This thesis consists mainly of three papers concerned with Markov additive processes, Lévy processes and applications on finance and insurance. The first chapter is an introduction to Markov additive processes (MAP) and a presentation of the ruin problem and basic topics of Mathematical Finance. The second chapter contains the paper "Lévy Systems and the Time Value of Ruin for Markov Additive Processes" written with Manuel Morales and that is published in the European Actuarial Journal. This paper studies the ruin problem for a Markov additive risk process. An expression of the expected discounted penalty function is obtained via identification of the Lévy systems. The third chapter contains the paper "On a Generalization of the Expected Discounted Penalty Function to Include Deficits at and Beyond Ruin" that is submitted for publication. This paper presents an extension of the expected discounted penalty function in a setting involving aggregate claims modelled by a subordinator, and Brownian perturbation. This extension involves a sequence of expected discounted functions of successive minima reached by a jump of the risk process after ruin. It has important applications in risk management and in particular, it is used to compute the expected discounted value of capital injection. Finally, the fourth chapter contains the paper "The Minimal Entropy Martingale Measure (MEMM) for a Markov-Modulated Exponential" written with Romuald Hérvé Momeya and that is published in the journal Asia Pacific Financial Market. It presents new results related to the incompleteness problem in a financial market, where the risky asset is driven by Markov additive exponential model. These results characterize the martingale measure satisfying the entropy criterion. This measure is used to compute the price of the option and the portfolio of hedging in an exponential Markov-modulated Lévy model.

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