Dissertations / Theses on the topic 'Operation analysis'
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1
Zhang, Ji. "Vibratory analysis of tillage operation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23896.pdf.
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Bjerkholt, Runa Folvik. "Analysis of ROV Lift Operation." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26074.
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As a service company performing subsea operations, DeepOcean wishes to operate in the widest range of sea conditions. The majority of all offshore operations are performed using remotely operated vehicles (ROVs), where lifting through the splash zone is considered the most critical phase during launching and recovery of the ROV system. Available standards from DNV propose a systematic and analytical approach for estimating the hydrodynamic loads occurring in the splash zone. A maximum operational significant wave height, Hs, is determined using a proposed acceptance criteria. Experience from the industry have shown that the method is unreasonable conservative, consequently leading to a restrictive operational Hs window.The main objective of this master thesis is to compare results obtained from the analytical calculations with results obtained from the time domain simulation programs; Simulation of Marine Operations (SIMO) and OrcaFlex. The operational limit established in the time domain programs is based on the assumption that the maximum relative velocity between the crane tip and the waves represent a worst case scenario and that a slack lifting wire is not acceptable. This is due to the uncertainties associated with snap loading after a slack lifting wire. Three different ROV models have been established, two in OrcaFlex and one in SIMO. A sensitivity study regarding the hydrodynamic coefficients for the ROV models is also performed.The three different ROV models show different dependency of the added mass and drag term. The overall trend for the ROV systems is that the added mass dependency is reduced for the structures modelled with multiple elements, while the drag dependency is increased.The Simplified Method is certainly conservative compared to time domain simulations performed in SIMO and OrcaFlex. The present operational sea state of Hs = 4.5 m is rejected by the Simplified Method. If the operation is to be performed independent of a Tz value, an operational Hs of 0.75 m is acceptable according to the analytical calculations. From the time domain analyses in SIMO and OrcaFlex, the current operational sea state of Hs = 4.5 m could be justified if a limiting Tz is given. For launching this limiting value is 9 s, while for recovery of the ROV system the limiting Tz value is 8 s. The operational limit should not only be set by a Hs value, but also a Tz due to the large dependency of the wave period for lifting though the splash zone. Simulating the ROV lift operation in a time domain simulation program has proven to be a good alternative compared to the Simplified Method.
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Qiao, Hong. "Robotic peg-hole insertion operation analysis." Thesis, De Montfort University, 1994. http://hdl.handle.net/2086/13276.
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Olonisakin, Olufunmilayo Titilayo. "Peace creation and peace support operations : an analysis of the ECOMOG operation in Liberia." Thesis, King's College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310492.
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Ren, Zhifang Jennifer. "Wavelet based analysis of circuit breaker operation." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/512.
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Circuit breaker is an important interrupting device in power system network. It usually has a lifetime about 20 to 40 years. During breaker's service time, maintenance and inspection are imperative duties to achieve its reliable operation. To automate the diagnostic practice for circuit breaker operation and reduce the utility company's workload, Wavelet based analysis software of circuit breaker operation is developed here. Combined with circuit breaker monitoring system, the analysis software processes the original circuit breaker information, speeds up the analysis time and provides stable and consistent evaluation for the circuit breaker operation.
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Salman, Saad Ahmed. "An Analysis of Single Tooth Milling Operation." Thesis, KTH, Industriell produktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102553.
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This study examines the possible mechanisms found on hobs used in gear cutting by using a single insert face milling test. Cutting inserts are used to represent hob teeth.The two types of inserts used in this thesis, namely surface-prepared and edge-prepared insert, have been considered as inputs for the experiments. The basic objective of this work is to find out the behavioural patterns shown by the above-mentioned inserts during milling operations. After going through this thesis paper, one can comprehend various information during milling operation with the help of the illustrated graphs and diagrams, which have been inferred after extensive analysis. The output from this thesis would be the information assemblage of cutting force, vibration, chip thickness, engagement energy, tool losing edge volume and machined surface on work piece.
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Rana, Manish. "Statistical analysis and design of subthreshold operation memories." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/396376.
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This thesis presents novel methods based on a combination of well-known statistical techniques for faster estimation of memory yield and their application in the design of energy-efficient subthreshold memories. The emergence of size-constrained Internet-of-Things (IoT) devices and proliferation of the wearable market has brought forward the challenge of achieving the maximum energy efficiency per operation in these battery operated devices. Achieving this sought-after minimum energy operation is possible under sub-threshold operation of the circuit. However, reliable memory operation is currently unattainable at these ultra-low operating voltages because of the memory circuit's vanishing noise margins which shrink further in the presence of random process variations. The statistical methods, presented in this thesis, make the yield optimization of the sub-threshold memories computationally feasible by reducing the SPICE simulation overhead.
We present novel modifications to statistical sampling techniques that reduce the SPICE simulation overhead in estimating memory failure probability. These sampling scheme provides 40x reduction in finding most probable failure point and 10x reduction in estimating failure probability using the SPICE simulations compared to the existing proposals. We then provide a novel method to create surrogate models of the memory margins with better extrapolation capability than the traditional regression methods. These models, based on Gaussian process regression, encode the sensitivity of the memory margins with respect to each individual threshold variation source in a one-dimensional kernel. We find that our proposed additive kernel based models have 32% smaller out-of-sample error (that is, better extrapolation capability outside training set) than using the six-dimensional universal kernel like Radial Basis Function (RBF).
The thesis also explores the topological modifications to the SRAM bitcell to achieve faster read operation at the sub-threshold operating voltages. We present a ten-transistor SRAM bitcell that achieves 2x faster read operation than the existing ten-transistor sub-threshold SRAM bitcells, while ensuring similar noise margins. The SRAM bitcell provides 70% reduction in dynamic energy at the cost of 42% increase in the leakage energy per read operation. Finally, we investigate the energy efficiency of the eDRAM gain-cells as an alternative to the SRAM bitcells in the size-constrained IoT devices. We find that reducing their write path leakage current is the only way to reduce the read energy at Minimum Energy operation Point (MEP). Further, we study the effect of transistor up-sizing under the presence of threshold voltage variations on the mean MEP read energy by performing statistical analysis based on the ANOVA test of the full-factorial experimental design.Esta tesis presenta nuevos métodos basados en una combinación de técnicas estadísticas conocidas para la estimación rápida del rendimiento de la memoria y su aplicación en el diseño de memorias de energia eficiente de sub-umbral. La aparición de los dispositivos para el Internet de las cosas (IOT) y la proliferación del mercado portátil ha presentado el reto de lograr la máxima eficiencia energética por operación de estos dispositivos operados con baterias. La eficiencia de energía es posible si se considera la operacion por debajo del umbral de los circuitos. Sin embargo, la operación confiable de memoria es actualmente inalcanzable en estos bajos niveles de voltaje debido a márgenes de ruido de fuga del circuito de memoria, los cuales se pueden reducir aún más en presencia de variaciones randomicas de procesos. Los métodos estadísticos, que se presentan en esta tesis, hacen que la optimización del rendimiento de las memorias por debajo del umbral computacionalmente factible mediante la simulación SPICE. Presentamos nuevas modificaciones a las técnicas de muestreo estadístico que reducen la sobrecarga de simulación SPICE en la estimación de la probabilidad de fallo de memoria. Estos esquemas de muestreo proporciona una reducción de 40 veces en la búsqueda de puntos de fallo más probable, y 10 veces la reducción en la estimación de la probabilidad de fallo mediante las simulaciones SPICE en comparación con otras propuestas existentes. A continuación, se proporciona un método novedoso para crear modelos sustitutos de los márgenes de memoria con una mejor capacidad de extrapolación que los métodos tradicionales de regresión. Estos modelos, basados en el proceso de regresión Gaussiano, codifican la sensibilidad de los márgenes de memoria con respecto a cada fuente de variación de umbral individual en un núcleo de una sola dimensión. Los modelos propuestos, basados en kernel aditivos, tienen un error 32% menor que el error out-of-sample (es decir, mejor capacidad de extrapolación fuera del conjunto de entrenamiento) en comparacion con el núcleo universal de seis dimensiones como la función de base radial (RBF). La tesis también explora las modificaciones topológicas a la celda binaria SRAM para alcanzar velocidades de lectura mas rapidas dentro en el contexto de operaciones en el umbral de tensiones de funcionamiento. Presentamos una celda binaria SRAM de diez transistores que consigue aumentar en 2 veces la operación de lectura en comparacion con las celdas sub-umbral de SRAM de diez transistores existentes, garantizando al mismo tiempo los márgenes de ruido similares. La celda binaria SRAM proporciona una reducción del 70% en energía dinámica a costa del aumento del 42% en la energía de fuga por las operaciones de lectura. Por último, se investiga la eficiencia energética de las células de ganancia eDRAM como una alternativa a los bitcells SRAM en los dispositivos de tamaño limitado IOT. Encontramos que la reducción de la corriente de fuga en el path de escritura es la única manera de reducir la energía de lectura en el Punto Mínimo de Energía (MEP). Además, se estudia el efecto del transistor de dimensionamiento en virtud de la presencia de variaciones de voltaje de umbral en la media de energia de lecture MEP mediante el análisis estadístico basado en la prueba de ANOVA del diseño experimental factorial completo.
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Joo, Delbert S. "A systems analysis of U.S. Army operation assessments." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118543.
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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, System Design and Management Program, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 102-104).
The U.S. Army conducts assessments throughout all levels of warfare in order to gain a better understanding of progress towards a goal. The Army specifically conducts operation assessments to measure the effectiveness of employing military forces. The assessment process is an iterative activity that is present throughout the mission planning process. The current state of operation assessments is the result of doctrine and methodology developed over the past decades of warfare. However, the need for further development of the assessment process has been identified by several stakeholder groups within the ecosystem. This research aims to provide a thorough analysis of the operation assessment enterprise and provide recommendations for opportunities of architectural improvement. The research methodology includes a literature review, stakeholder assessments and interviews, and systems analysis methods applied within an Architecting for Innovative Enterprise Strategy (ARIES) framework to assess current state conditions and identify opportunities of transformation for a future state system. The proposed future state elements are then analyzed to determine an increase of value delivery across multiple levels of the assessment process. The research identifies opportunities in system design that can be further developed to better deliver value to stakeholders. The implementation of assessment-specific training is assessed to have the most impactful effect upon multiple levers of the system. Additional capability awareness training and advocacy of the process to key stakeholders can also work to propagate more effective assessment products and services. Finally, the analysis of assessment capabilities as an accumulation of information supports recommendations to implement measures that better capture and disseminate experience within the system.
by Delbert S. Joo.
S.M. in Engineering and Management
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Boley, Alexander. "Automatic wind turbine operation analysis through neural networks." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214551.
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This master thesis handles the development of an automatic benchmarking program for wind turbines and the thesis works as the theoretical basis for this program. The program is created at the request of the power company OX2 who wanted this potential to be investigated. The mission given by the company is to: 1. to find a good key point indicator for the efficiency of a wind turbine, 2. to find an efficient way to assess this and 3. to write a program that does this automatically and continuously. The thesis determines with a study of previous research that the best method to utilize for these kinds of continuous analyses are artificial neural networks which can train themselves on historical data and then assess if the wind turbine is working better or worse than it should with regards to its history. This comparison between the neural network predicted operation and the actual operation works as the measurement of the efficiency, the key point indicator for how the turbine work compared to how it historically should operate. The program is based on this principle and is completely written in MATLAB. Further testing of the program found that the best variables to use are wind speed and the blade pitch angle as input variables for the neural network and active power as the target used as the variable to predict and assess the operation. The final program was able to be fully automated and integrated into the OX2 system thanks to the possibility to continuously import wind turbine data through APIs. In the final testing was the program able to identify 75% of the anomalies manually found in the half year and in the five turbines used for this thesis, the small anomalies not found manually but identified by the program excluded.Den här masteruppsatsen hanterar utvecklandet av ett automatiskt driftanalyseringsprogram för vindkraftverk och fungerar som det teoretiska underlaget för detta program. Programmet utvecklades på uppdrag av kraftbolaget OX2 som ville undersöka potentialen för ett sådant analysprogram i deras verksamhet. Uppdraget givet var att: 1. ta fram en bra indikator när det gäller den faktiska effektiviteten av ett vindkraftverk, 2. att hitta ett effektivt sätt att använda detta måttet i en analys där målet är att hitta avvikelser, och 3. skriva ett program som automatiskt kan använda måttet och metoden över tiden. Rapporten kommer via litteraturstudie fram till att tidigare forskning visar på att neurala nätverk är den mest lovande metoden för att genomföra sådan här analys. Dessa nätverk kan träna sig själva på historiska data och sedan analysera om vindturbinen arbetar bättre eller sämre än historiskt. Den här jämförelsen mellan den historiskt grundade förutspådda kraften ut och den faktiska kraften ut fungerar som kvalitetsmåttet på hur bra turbinen fungerar. Programmet är baserat på den här principen och är helt skriven i MATLAB. Vidare tester av programmet visar att de bästa variablerna att använda för att förutspå kraften ut är vindhastigheten och bladens vinkel mot vinden. Slutprogrammet var kapabelt att fullt automatiskt och integrerat i OX2s system identifiera 75% av alla avvikelser som manuellt hittats i ett halvårs data på de fem turbinerna använda för rapporten, småfel hittade av programmet men inte manuellt exkluderat.
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Garner, William Howard. "Iteration of the power operation." Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/941367.
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This thesis is an investigation of the sequence of functions defined by fl (x) -xand fn+1 (x) -x , where the power is the principal value.In the case where the sequence is restricted to positive real this sequence of functions over thecomplex plane, we attack real numbers, the problem yields to the methods of analysis and we prove the behavior of the sequence.The more general problem of describing the behavior of both analytically and numerically. Though no full rigorous solution is given, the results presented suggest the behavior of the sequence over the complex plane is very interesting.Department of Mathematical Sciences
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Strömberg, Thomas. "A study of the operation of infimal convolution." Doctoral thesis, Luleå tekniska universitet, Matematiska vetenskaper, 1994. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26709.
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This thesis consists of five papers (A-E), which examine the operation of infimal convolution and discuss its close connections to unilateral analysis, convex analysis, inequalities, approximation, and optimization. In particular, we attempt to provide a detailed investigation for both the convex and the non-convex case, including several examples. Paper (A) is both a survey of and a self-contained introduction to the operation of infimal convolution. In particular, we discuss the infimal value and minimizers of an infimal convolute, infimal convolution on subadditive functions, sufficient conditions for semicontinuity or continuity of an infimal convolute, "exactness," regularizing effects, continuity of the operation of infimal convolution, and approximation methods based on infimal convolution. A Young-type inequality, closely connected to the operation of infimal convolution, is studied in paper (B). The main results obtained are an equivalence theorem and a representation formula. In paper (C) we consider coercive, convex, proper, and lower sernicontinuous functions on a reflexive Banach space. For the infimal convolution of such functions we establish, in particular, different formulae. Moreover, we demonstrate the possibility of using the formulae obtained for solving special types of Hamilton-Jacobi equations. Furthermore, the operation of infimal convolution is interpreted from a physical viewpoint. Paper (D) presents properties of infimal convolution of functions that are uniformly continuous on bounded sets. In particular, we present regularization procedures by means of infimal convolution. The role of growth conditions on the functions under consideration is essential. Finally, in paper (E) we study semicontinuity, continuity, and differentiability of the infimal convolute of two convex functions. Moreover, under certain geometric conditions, the classical Moreau-Yosida approximation process is, roughly speaking, extended to the non-convex case.Godkänd; 1994; 20070426 (ysko)
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Zenginis, Ioannis. "Optimal sizing and operation planning of microgrids and operation analysis of charging stations for electric vehicles." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/664711.
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Energy and transportation sectors are going through major changes as a result of technological advances, depletion of fossil fuels and climate change. With regard to the energy sector, the future smart grid is expected to be an interconnected network of small-scale and self-contained microgrids, in addition to a large-scale electric power backbone. By utilizing microsources, such as renewable energy sources, energy storage systems and vehicle-to-grid systems, microgrids target to satisfy the customers’ energy demands in a safe, reliable, economic and environmentally friendly way. With regard to the changes in the transportation sector, internal combustion engine vehicles are expected to be gradually replaced by electric vehicles, which are considered to be a promising solution for mitigating the impact of transportation sector on the environment. The presented thesis deals with two main topics; the first one refers to the optimal sizing and operation planning of microgrids comprising various urban building types, while the second one is related to the operation of fast charging stations for electric vehicles that are located in densely populated areas.
The first objective of the thesis is to examine the effect of energy exchanges among interconnected buildings with diverse load profiles on the sizes of power equipment to be installed at the buildings. To this end, a mixed integer linear programming optimization framework is presented that determines the optimal capacities of photovoltaic panels, energy storage systems, and inverters, as well as the optimum management of the generated power. As a first step, the benefits of cooperation among buildings that are already interconnected through an existing point of common coupling is examined. The cooperation benefits are derived by comparing the buildings' costs when they participate in the microgrid with their costs when they operate as separate entities. As a second step, a different microgrid topology is proposed where energy exchanges take place through a common DC bus. In this way, neighboring buildings that are not already physically connected can be members of the same microgrid. Moreover, the optimization results for the new topology are obtained by using the Nash bargaining method, through which the benefits of cooperation are equally distributed among the participating members. Finally, the possible integration of
new buildings in the existing microgrid at a later time point is also examined.
The second objective of the thesis is to provide an accurate operation analysis of fast charging stations for electric vehicles. To this end, a novel queuing theory-based model is presented that classifies the various electric vehicles by their battery size. As a first step, it is analyzed a charging station that contains DC outlets, and the electric vehicles recharge their batteries up to the maximum possible level. The proposed model takes into account the arrival rates and state of charge of the electric vehicles' batteries when arriving at the station, in order to compute the maximum number of customers that can be served, subject to an upper bound for the waiting time in the queue. In addition, a charging strategy is proposed, which allows the charging station to serve more customers without any increase in the queue waiting time. As a second step, it is considered that the charging station can serve both DC and AC electric vehicle classes, while a more flexible way is adopted for denoting the customers' recharging patterns. Based on these additional novelties, the overall profit margin of the charging station operator, and the queue waiting times of the DC and AC classes are calculated under two different pricing policies.
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Johnson, J. Andrew Gates William R. Terasawa Katsuaki. "Cost estimates for Operation Desert Shield / a budgetary analysis." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School; Available from the National Technical Information Service, 1991. http://handle.dtic.mil/100.2/ADA244675.
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Thesis (M.S. in Financial Management) Naval Postgraduate School, Dec. 1991.Thesis advisors, William R. Gates and Katsuaki L. Terasawa. AD-A244 675. Bibliography: p. 151-157. Also available online.
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Hu, Lingjun. "Advancing C1 catalysis by spatiotemporal analysis and dynamic operation." Doctoral thesis, Universitat Rovira i Virgili, 2020. http://hdl.handle.net/10803/669419.
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La química del C1, reaccions en les que participen molècules d’un carboni com CO, CH2 i CO2, s’espera que jugui un paper més important en la indústria química i la protecció mediambiental. Aquesta tesis descriu nous conceptes de reactors i metodologies analítiques operando per a entendre i innovar tres reaccions de la química del C1: l’acoblament oxidatiu de metà (OCM), la captura de CO2 i la seva reducció (CCR) a metà, i el reformat sec de metà (DRM). Per al OCM, la investigació espai temporal de gradients fisicoquímics de la concentració gasosa, la temperatura del catalitzador i el comportament del coc present al reactor catalític sota condicions extremes (fins a 1000 ºC) clarifiquen diferents mecanismes de reacció regits per la naturalesa del catalitzador utilitzat. S’observa que reaccions homogènies no selectives que tenen lloc en la fase gasosa són induïdes per l’oxidació explosiva de l’hidrogen produïda mitjançant l’oxidació parcial del CH4. Aquests camins desfavorables de la reacció es poden suprimir utilitzant promotors que modifiquen la superfície del catalitzador, millorant així dràsticament la selectivitat del producte a età i etilè en lloc de CO i CO2. En segon lloc, es desenvolupa una nova estratègia CCR per a la metanació de CO2 basada en una operació d’estat no estacionari utilitzant catalitzadors de Ni. Els efectes de dos promotors, K i La, en la capacitat de capturar CO2, el rati de reducció i els mecanismes de reacció són desvelats utilitzant mesures operando i espai temporals de DRIFTS. Finalment, s’explora el potencial d’operacions en estat no estacionari i el concepte de looping per al DRM fent ús de catalitzadors de Ni, aclarint així els rols que tenen el suports, els promotors i la temperatura de la reacció en la descomposició de CH4, així com la formació de coc i la seva oxidació per CO2.La química del C1, reacciones en las que participan moléculas de un carbono como CO, CH4 y CO2, se espera que juegue un papel más importante en la industria química y protección medioambiental. Esta tesis doctoral describe nuevos conceptos de reactores y metodologías analíticas operando para entender e innovar tres reacciones de la química del C1: el acoplamiento oxidativo de metano (OCM), la captura de CO2 y su reducción (CCR) a metano, y el reformado seco de metano (DRM). Para el OCM, la investigación espaciotemporal de gradientes fisicoquímicos de la concentración gaseosa, la temperatura del catalizador y el comportamiento del coque presente en el reactor catalítico bajo condiciones extremas (hasta 1000 ºC) clarifican distintos mecanismos de reacción regidos por la naturaleza del catalizador empleado. Se observa que reacciones homogéneas no selectivas que tienen lugar en la fase gaseosa son inducidas por la oxidación explosiva del hidrógeno producida mediante la oxidación parcial del CH4. Estos caminos desfavorables de la reacción se pueden suprimir utilizando promotores que modifican la superficie del catalizador, mejorando así drásticamente la selectividad del producto hacia etano y etileno en lugar de CO y CO2. En segundo lugar, se desarrolla una nueva estrategia CCR para la metanación de CO2 basada en una operación de estado no estacionario utilizando catalizadores de Ni. Los efectos de dos promotores, K y La, en la capacidad de capturar CO2, la ratio de reducción y los mecanismos de reacción son desvelados mediante medidas operando y espaciotemporales de DRIFTS. Finalmente, se explora el potencial de operaciones en estado no estacionario y el concepto de looping para el DRM utilizando catalizadores de Ni, aclarando los roles que tienen los soportes, los promotores y la temperatura de la reacción en la descomposición de CH4, así como la formación de coque y su oxidación por CO2.
C1 chemistry, reactions involving one-carbon containing molecules such as CO, CH4 and CO2, is expected to play even more vital roles for future chemical industries and environmental protection. This doctoral thesis describes novel reactor concepts and operando analytical methodologies to understand and innovate three C1 chemistry of future importance, namely oxidative coupling of methane (OCM), CO2 capture and reduction (CCR) to methane, and dry reforming of methane (DRM). For OCM, spatiotemporal investigation of physicochemical gradients of gaseous concentration, catalyst temperature and coking behavior present in the catalytic reactor under harsh conditions (up to ca. 1000 °C) clarifies distinct reaction mechanisms ruled by the nature of the catalyst materials used. Strikingly, unselective homogeneous reactions taking place in the gas phase are shown to be induced by the explosive oxidation of hydrogen produced via partial oxidation of CH4. Such unfavorable reaction paths can be suppressed by the use of promoters which modify the catalyst surface, thereby drastically improving the product selectivity towards C2 molecules (ethane and ethylene) against CO and CO2. Secondly, a novel CCR strategy for CO2 methanation based on unsteady-state operation is developed using Ni-based catalysts. The effects of two promoters, K and La, on CO2 capture capacity, reduction rate and reaction mechanisms are unraveled by means of spatiotemporal operando diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Finally, the potential of unsteady-state operation and looping concept are explored for DRM using Ni-based catalysts, clarifying the critical roles of support materials, promoters and reaction temperature on CH4 decomposition, coke formation and coke oxidation by CO2.
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Penekli, Ufuk. "Finite Element Analysis Of Bending Operation Of Aluminum Profiles." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609463/index.pdf.
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Bending process is an important forming process in most industrial fields. Springback and cross-section distortion are commonly faced problems in bending process. Springback behavior of closed and open section beams changes with different parameters such as cross-section type, cross-section dimensions, bend radius and bend angle. For closed sections like tube, the dominating problem is cross-section distortion. The thickness of the tube at intrados (inner surface of tube being in contact with die) increases, whereas the thickness of the tube at extrados (outer surface of tube) decreases. Furthermore, another cross-section distortion type for tubes is flattening at extrados which is undesirable in some manufacturing operations.
The present research, using finite element method, focuses on investigating the springback behavior of commonly used aluminum beams which are T-Shaped, U-Shaped and tubular for different cases. A series of analyses is performed for a beam and the changing parameters in the analyses are bend radius and thickness.
Furthermore, for tubes, the effects of axial force on springback behavior are investigated. It is seen that the axial force causes stretching and the springback angles are decreased.
Moreover, in order to overcome cross-section distortion in flattening for tubes, different internal pressures are used and the effects of internal pressure are investigated. By applying appropriate internal pressure, the flattening distortion is mostly eliminated.
Conclusions are drawn revealing springback behaviors and cross-section distortions with respect to bend radius, bend angle, thickness, axial pull and internal pressures. They are in good agreement with other published researches and experimental results. Therefore, the models can be used to evaluate tooling and process design in bending operations.
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Ely, Brandon Lee. "Houston LDAR II network: design, operation, and performance analysis." Texas A&M University, 2008. http://hdl.handle.net/1969.1/85993.
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The Houston LDAR II network is an array of twelve VHF time-of-arrival (TOA)
sensors operated by Texas A&M University. The goals of the network are to conduct indepth
studies of thunderstorm electrification and provide timely lightning threats to the
Houston area. Before analyses are conducted using data from the Houston LDAR
network, it is necessary to understand the LDAR networkâ s performance and limitations,
such as the LDAR source detection efficiency, network range, and location accuracy.
Initial results from the 31 October 2005 Mesoscale Convective System (MCS)
timing error analysis revealed an RMS timing error for the Houston LDAR network of
90 ns for 6 sensor solutions. This gives a three-dimensional location accuracy of 1 km at
a distance of 150 km and 100 m over the center of the network. Reanalysis with updated
sensor positions decreased the RMS timing error to 75 ns. This decrease in RMS timing
error increased the median three-dimensional location accuracy by ~100 m at a 100 km
range. The network has been operated at both 70 MHz and 40 MHz. Model results of
detection efficiency suggest that the change to 40 MHz yields an increase of 9 - 10 dB in
network sensitivity. Analysis of VHF source power distributions shows a similar shift
from that expected from the model. These results show that the 40 MHz LDAR network
detects ~3.3 times more VHF sources than the 70 MHz network.
The analysis of the usable network range for research purposes is currently set by
rough guidelines of location accuracy and detection efficiency. For location accuracy, a
1 km limit allows storm analysis out to a range of more than 150 km. For the detection
efficiency analysis, results based on source power distributions suggest a gradual fall off
with range. Examining the change in VHF source density by range reveals different
results. VHF source density remained fairly constant out to a range of 100 km at which
point a significant fall off was observed. Based on these results the usable network
range for the Houston network is 100 km.
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Lin, Tsan-hwan. "Operation analysis and design of large complex conveyor networks." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/24300.
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Duckworth, Ian J. "The analysis, design and operation of auxilary ventilation systems." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268427.
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Hafsteinsson, Emil, and Richard Hjertqvist. "A virtualization of a turning operation : a collision analysis." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-19659.
Full textAbstract:
Industry 4.0 is on the rise and shows promise in manufacturing. Currently a lot of technologies are required to progress in its development to make Industry 4.0 a reality. A physical production line operation at Volvo Cars was analysed by creating a virtual copy in a CAD-software, and then running simulations. The aim of this thesis was re-creating a lathe operation virtually to verify that no collisions occur during operation 30. Research was made to reduce the non-machining time by repositioning the tools in a turret which reduced the number of rotations needed by the turret to fully machine the crankshaft. Data from the research suggest four different too configurations that save time, and had to be simulated before implementation. By simulating and analysing the virtual simulation it’s possible to verify that no collisions occur during operations, no matter the tool locations, meaning that the suggested turret configuration can be used safely
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Ramnath, Sandhya. "Analysis of a multi-stage forming operation using ALPID." Ohio University / OhioLINK, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1184074274.
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Chen, Bing Hui. "Feature extraction and knowledge discovery in process operation analysis." Thesis, University of Leeds, 1998. http://etheses.whiterose.ac.uk/626/.
Full textAbstract:
An integrated framework for process monitoring is developed in this study which consists of three components: (1) feature extraction from dynamic transient signals using multiscale wavelet transform; (2) operational state identification using unsupervised and recursive learning methods; and (3) automatic extraction of knowledge rules from process operational data and embedding of the extracted knowledge in the structure and weights of fuzzy-neural networks. The methodologies and the prototype system which have been developed are illustrated and evaluated using data collected from a dynamic simulator of a refinery catalytic cracking process. Methods for pre-processing dynamic transient signals for feature extraction, dimension reduction and noise removal are investigated and a new method is developed which makes use of wavelet transform to determine the singularities and irregularities of a dynamic transient signal by identifying the extrema from wavelet multiresolution analysis. The method is able to reduce the dimensionality of the data and removes noise components in a single step as well as capturing the most significant components of the dynamic response. A modified version of the unsupervised neural network ART2, designated ARTNET, has been developed which uses wavelet feature extraction to provide a substitution of the data pre-processing part of ART2. ARTNET is shown to be more effective in avoiding the adverse effects of noise, less sensitive to user defined parameters and faster in computation, as well as still retaining the advantages of unsupervised and recursive learning. Based on this, a fuzzy neural network is developed which is able to automatically extract knowledge rules from process data. The knowledge rules which are generated are transparent and explicit to operators. The method is therefore able to bridge the gap between numerical data and qualitative knowledge and takes advantage of the features of neural networks for capturing concepts and so provides an effective and robust method for learning knowledge from process data. Various methods for integrating different facets of a problem, and making use of this information in parallel to mutually compensate for drawbacks of any single approach are also exploited. Data obtained from a dynamic simulator of a refinery fluid catalytic cracking process (FCC) has been used to illustrate the methodologies and to evaluate a prototype system for using these new approaches. FCC provides a very useful case study because of the highly non-linear dynamics arising from the strong interactions between the reactor and fluidised bed regenerator derived from the mass and momentum balance. The use of simulation data makes it possible to look at the results in detail so that the methods can be fully tested. The case studies illustrate the potential of the methods developed.
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Grunder, Henry Dale. "Overdue: A policy analysis of college library operation programs." W&M ScholarWorks, 1988. https://scholarworks.wm.edu/etd/1539618645.
Full textAbstract:
The problem was to identify and assess the policy basis for the universal policy of colleges to have library operation programs. Colleges are higher education institutions whose main business is the delivery of college education, undergraduate instruction, leading to baccalaureate degrees. The conventional wisdom--the explanation of policy basis given in the literature--is a construct here called the College Library Doctrine. According to it, there is a fundamental relationship between the library operation program and the delivery of college education, undergraduate instruction. This relationship is said to be the result of historical process.;The College Library Doctrine was analyzed using a forensic or investigative approach. This approach looked for consistency and/or contradiction, treating the literature as data or evidence.;As a result of the analysis it was found that the same data or evidence supports a quite different explanation of why colleges have library operation programs. This alternative explanation of policy basis has little to do with the delivery of college education, undergraduate instruction. The existence of this quite different alternative explanation raises a serious reasonable doubt over the existence of the fundamental relationship posited by the College Library Doctrine.;The unresolved doubt, along with the recurrence of the college library operation program in the arena of institutional reputation, in topics such as "quality," image, and prestige--through such phenomena as accreditation, ratings, rankings, and media coverage--suggest a policy relocation of the college library operation program from its usual but problematic placement in the broad area of "academic support," to a different venue, "institutional support." Enhancement of institutional reputation is an important part of institutional support. In this relocation there would be a better fit between policy basis and policy; and there, accordingly, the institutional support benefit and potential of the library operation program might be maximized.;The Appendix recalls an early question of the analysis conceptualization and demonstrates that, whether or not the results and conclusions of the analysis itself are accepted, there are decisive flaws in attempts to prescribe college library program resource allocation on the basis of historical data.
23
Dvorak, Gary John. "Economic analysis of irrigation pumping plants." Thesis, Kansas State University, 1985. http://hdl.handle.net/2097/9834.
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Allmond, Jon, Ryan Birkelbach, Joe Campbell, Will Chapman, Karl Hassenftatz, Andrew Laidler, Tood Lucht, et al. "Recapitalization of Amphibious Operation and Lift." Thesis, Monterey, California : U.S. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/7278.
Full textAbstract:
Includes supplementary material.CAPSTONE PROJECT REPORT
System Engineering and Analysis Cohort 18A and Temasek Defense Systems Institute
Approved for public release, distribution unlimited
The aging Whidbey Island and Harpers Ferry class ships, LSD-41 and 49 respectively, comprise just over one third of the amphibious navy. However, a solution to the capability gap created by the loss of these ships is needed to maintain the effectiveness of the amphibious fleet across a broad spectrum of mission areas. This research effort considers future ship designs and fleet architectures to meet the capability gaps left by the decommissioning of the LSD-41 and 49 class ships. With respect to lift capacity, performance capability, cost and a risk assessment, the analysis showed the LPD-17 or a LSD(X) approximately 30% larger than the existing classes to be acceptable replacement classes. This analysis also supports further research to determine the most robust fleet architecture apart from the current eleven LHA or LHD, eleven LPD and eleven LSD paradigm.
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Pang, Hon-man, and 彭漢文. "Systematic analysis of switching power converters for long operation life." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44912742.
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Haynes, Andrew. "An analysis of the operation of the financial services regime." Thesis, University of Wolverhampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264042.
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Lau, Erwin Kin-Ping 1977. "Analysis of 1.55[mu]m semiconductor lasers for modelocked operation." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/86684.
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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.In title on t.p., "[mu]" appears as the lower-case Greek letter.
Includes bibliographical references (p. 189-194).
by Erwin Kin-Ping Lau.
M.Eng.
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Hsieh, Wan-Chun, and 謝宛均. "Operation Performance analysis on Liner Shipping Companies in Global Logistics operations." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/87423824246736856540.
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Lee, Tzy Fu, and 李子復. "Semiconductor IC Testing Operation Performance Analysis." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/2tdnfp.
Full textAbstract:
碩士國立交通大學
管理學院高階主管管理碩士學程
93
IC testing is an important process in semiconductor industry, which will not be replaced in the semiconductor supply chain. Our research believes IC testing business will keep playing an important role in the semiconductor value chain as long as the semiconductor industry. This paper studies the relationship between the companies inside the IC testing supply chain and use EVA and standardized EVA to find the operation performance of the selected companies. The purpose of this research is to find out how the companies in the IC testing industry should do to face the fast changing technology and to provide a proper suggestion and advice to these companies. Our research found out that inside the 22 selected companies, MediaTek Inc. had the best performance. MediaTek Inc. is the only company in the selected samples in design house industry using matured technology instead of the latest technology but earning the hightest profit for its shareholders in the selected samples (the average standardized EVA was 148.34 from 2001 to 2004). Meanwhile, the average standardized EVA of the semiconductor giant - Intel was negative (-2.8) even though it always delivers faster and faster CPU. The entire IC testing supply chain needs to be changed entirely; otherwise there are many companies will be out of business if they keep running the same strategy. And this is a very important discovery for IC testing industry especially, which is extremely vertical integrated. Fabless design houses also need to think about this problem, too. If they continuous to chase the new technology, they will damage the whole supply chain. Our research suggest Intel as a supply chain leader could issue a proposal for the whole industry to re-think a new strategy: either slowing down pursuing advanced technology or showing a new way for the whole IC testing industry to survive.
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An-GuoHong and 洪安國. "Nonlinear Analysis of Flight Operation Data." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/17559160527574474007.
Full textAbstract:
碩士國立成功大學
民航研究所
101
In this study, we combine the method of coefficient matrix and eigenvalue from linear algebra with iterative mapping and phase plane analysis as a possible research instruments to quantify the stability of flight operation. By using the data obtained from Flight Operation Quality Assurance System, we choose four parameters including height, speed, vertical speed and rotational speed of engine to construct coefficient matrix A and define an indicator to assess the stability of flight operation. Comparing the average of the indicator between normal flights and event flights distinguished by FOQA system, it is possible to revel the difference of stability between normal flight and event flights. In the future work, the preliminary result of this study should combine with Flight Safety Margin theory to validate the effectiveness of the result. Keywords: Stability of flight operation, FOQA system, Coefficient matrix, Eigenvalue
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Ulaganathan, Chandradevi. "Design and Analysis of a General Purpose Operational Amplifier for Extreme Temperature Operation." 2007. http://trace.tennessee.edu/utk_gradthes/327.
Full textAbstract:
Operational amplifiers (op amps) are key functional blocks that are used in a variety of analog subsystems such as switched-capacitor filters, analog-to-digital converters, digital-to-analog converters, voltage references and regulators, etc. There has been a growing interest in using such circuits for "extreme environment" electronics, in particular for electronics capable of operating down to deep-cryogenic temperatures for lunar and Martian surface explorations.
This thesis presents the design and analysis of a general purpose op amp suited for “extreme environment” applications, with a wide operating temperature range of 93 K to 398 K. The op amp has been implemented using a CMOS architecture to exploit the low temperature operational advantages offered by MOS devices, such as increase in carrier mobility, increased transconductance, and improved switching speeds. The op amp has a two-stage architecture to provide high gain and also incorporates common-mode feedback around the input stage. Tracking compensation has been implemented to provide stable frequency compensation over wide temperature. The op amp has been fabricated in a commercial 0.35-μm 3.3-V SiGe BiCMOS process. The op amp has been tested for the temperature range of 93 K to 398 K and is unity-gain stable and fully functional over this range.
This thesis begins with a study of the impact of temperature on MOS devices and operational amplifiers. Next, the design of the wide temperature general-purpose operational amplifier is presented along with an analysis of the common-mode feedback circuit. The op amp is then characterized using simulation results. Finally, the test setup is presented and the measurement results are compared with those from simulation.
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Chen, Shu-Yen, and 陳書妍. "Operation Firm Avenue Analysis of 3G Industry." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/u3ad73.
Full textAbstract:
碩士銘傳大學
經濟學系碩士班
95
Abstract This paper forecasts subscribers and revenues of 3G and discusses about critical factors that affect the development of 3G industry by using system dynamic, Five Forces analysis and SWOT analysis as research approaches. The paper also discusses about that 3G industries will face a little threats, opportunities, strengths and weaknesses. These are mainly analysis and framework of the paper. The paper establishes the model of 3G subscribers and the model of 3G revenue to forecast subscribers and revenues of 3G until 2015 in the future. The conclusion states that policies (including license expenses of 3G and mature time of 2G), 3G subscribers and data download usage are mainly critical factors that affect revenues of 3G operation firm. The forecast outcome states that there will be about 17,350 thousands of 3G subscribers in 2015. It also states that revenues of 3G operation firm will run up to NT $538 hundred millions in 2015. But the 3G operation firm will just start to make a profit in 2012 mainly because of expensive license expenses and construction costs. The development of 3G industry consequently is not so sanguine in the short time but it should be sanguine in the long time.
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Chiang, Kuan-Lin, and 江坤琳. "The Operation Analysis of Consumers'' Credit Insurance." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/trzw35.
Full textAbstract:
碩士銘傳大學
經濟學系碩士在職專班
93
Abstract The insurance and financial markets are facing fierce competition because of the trends of globalization and liberalization. For those insurers who are providing consumers’ credit insurance coverages, they should try to achieve the goals of offering their customers with more convenient access to various types of financing, spreading the credit risks for financier in offering this line of business effectively, and maintaining a fair safety margin to acquire reasonable profit. This study is based on reviewing related published articles and interviewing with experts in this field from the aspects of risk management, product design, and business operations to discuss the existing problems faced by the insurers and to try to provide solutions to those problems. The conclusions of this study are summarized as below: I. Risk Management (I) Credit risk control is fundamental for operating this line of business. (II) The premium has to fully reflect the exposure covered under the policies. II. Product Design (I) Policy deductibles and policy limits have to be set appropriately to safeguard the insurers’ profit. (II) Differentiation of product is able to meet the different demands of financial institutions. III. Business Operation (I) The mechanism of co-insurance clause is a key to the success of running this line of business. (II) This insurance, which has a function of window dressing on overdue loans ratio, is able to meet the different demands of financiers. IV. This study analyses the characteristics of this line of business, provides concrete recommendations and revise some insurance clauses for the future reference of the insurers. The results of this study lead to the following four recommendations: I. Enhance the perception of credit risk and layout appropriate underwriting standard to ensure risk control effectively to identify better quality of business. II. Understand the characteristics of this line of business and develop suitable policy form, to smoothly expand the business and safeguard the reasonable profit of the insurers. III. Add a mechanism of co-insurance clause to ensure financial institutions underwriting risks cautiously to guarantee the quality of loans and avoid failure in operation. IV. Differentiate the product design to meet the demands of financial institutions to have three wins among borrowers, financiers, and the insurers.
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Ting-Cheng, Chen, and 陳鼎誠. "Operation Efficiency Analysis in Motherboard Industry -- DEA." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/77567104253937802812.
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碩士東吳大學
經濟學系
90
Abstract The motherboard industry has developed soon within 20 years and now become the top in the world. In 2000 the market share reached to 84.7%. However, due to the saturation of the whole market and the standardization of the products, it is obvious that the industry has stepped to centralization. The trend of “The stronger will be stronger; the weaker will be weaker” can be seen in the industry. Therefore, the improvement of efficiency, the competition within the industry, and the ways to cope with the market changes in the future are critical topics to research.. This research uses Data Envelopment Analysis and Malmquist to evaluate the 13 domestic M/B firms’ efficiency. We choose fixed assets, R&D expenses, and employees as input factors; net income as output factor. The conclusions are as follows: 1.The firm which has more input / output does not mean it has higher efficiency. 2. All of 13 firms are lack of management efficiency, and they turn to pursue higher SEC. 3.Because of abundant resources and fund, large firms have competitive advantages to broaden the products and their SEC are better than other small ones.
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Hsu, Li-Hsiang, and 許麗香. "Analysis factors effects on Hospital operation efficiency." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/6uqgww.
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碩士東吳大學
經濟學系
93
Abstract In this study we use the non-parametric Data Envelopment Analysis (DEA) methods to assess the performance of Taiwan’s hospitals from 2001 to 2003. First, we use a DEA approach to measure relative efficiency scores on a sample of 140 Taiwan’s hospitals. Second, a censored Tobit regressions model is employed to estimate the efficiency effects. We use 4 types of input/output to measure relative efficiency scores and compare the results. Also, we use Malmquist index to measure Taiwan hospitals productivity. Our empirical results are summarized as follows: (1) The quality of services plays an important role in estimation hospitals operation efficiency and Malmquist index. (2) Military hospitals and public hospitals performed worse than private and juridical person hospitals. (3) The major factors that have a significant impact on efficiency consist of beds, inpatient day, the percentage of outpatients to inpatients, the quantity of high-priced medical devices, divisions and the percentage of licensed personnel to non-licensed. The results of this study provided some very useful managerial insights into the evaluation and improvement of hospital performance.
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Wang, Ying-Jie, and 王英杰. "Production Operation History Reconstruction and Data Analysis." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/70846792769305134644.
Full textAbstract:
碩士國立臺灣大學
工業工程學研究所
88
Production management needs the information from the production operation history. Since the operation history data is huge, disordered and volatile, a framework of the data set needs to be constructed. The framework should support the data mining for the production management, and contain the organization of the data storage. In this thesis, a framework is proposed for the production operation history data. The analysis that factory historical events are reconstructed from the data under the framework is mentioned. A simulation based on semiconductor manufacturing plants is constructed. The simulation records the operation data for the analysis of data. The content of this research includes: production information reviews, bottleneck analysis, the measures and data analysis of production management, and the simulation construction. The major achievement of this research is that the factory events are analyzed and the framework is developed. Moreover, a simulation model is developed and a speed up methodology of the simulation is developed. Using the simulation model, the operation data is generated and used for the data analysis. The inter-arrival times distribution is verified to follow exponential distribution for the queuing theory application.
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Tyan, Wann-pyng, and 田万坪. "Analysis of the Hospitials Pharmaceutical Operation Costs." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/81282180659493666030.
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Sung, Le-Yeh, and 宋樂業. "Human Factors Analysis for Helicopter Flight Operation." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/76695435579766537165.
Full textAbstract:
碩士國立成功大學
高階管理碩士在職專班
94
In the passed decade, the average accident rate is approximately 1.66 mishaps per million flight hours for the Republic of China (ROC) civil aircraft and it is 3.07 times of the World's average --- 0.54 mishaps per million flight hours. In addition, the average accident rate is 34.08 mishaps per 100,000 flight hours for the ROC rotor-wing aircraft while it is 8.74 for the USA rotor-wing aircraft. The ROC helicopter accident rate is almost 4 times of the USA accident rate. According to the data I mentioned above, the ROC flight safety is a concern when it is compared to the current world's flight safety level, especially the flight safety for helicopters. However, there are few exclusive researches for helicopter flight safety among the countless researches related to aviation/flight safety. As we know, flight safety is affected by many factors. The accident statistics tell us that the 70% flight accidents are caused by human factors. The purpose of this study is to determine the critical human factors that affect helicopter flight safety most and figure out a way to improve the flight safety level in our country. We include "Organization" among the SHEL model (Software, Hardware, Environment, and Liveware) to establish the HELLOS model which is emphasized on "liveware and liveware(s)" because we found that the human factors in accident were evolving from "individual" to "group". We hope the HELLOS could be more completed for analyzing the human factors. In this study, we received diverse data from government, civilian airlines, and militarizes and used quantitative methods for research. After factor screening and priority sorting, we draw a chart with quantitative scale called "Human Risk Factor for Helicopter Flight Safety", including 5 topical subjects and 17 factors. The priority order of topical subjects is: 1. Liveware and liveware. 2. Liveware and software. 3. Liveware and organization. 4. Liveware and environment. 5. Liveware and hardware.The 17 factors discussed in each topical subject are(Selections of first 10 item in 17): 1. Follow the Crew Resource Management (CRM) principles or not? 2. Flight safety cognition. 3. Environment or the vibration caused by aircraft. 4. The unhealthy equipment. 5. Pilot self-discipline. 6. Standard Operating Procedure (SOP) or regulations are feasible or not? 7. Familiar with the upcoming mission or not? 8. Training is valid or not? 9. Follow SOP exactly?10. Pilots' physiological functions. According to the affections and feasibilities of factors, we create the "Policy Schema" and divide those factors into the first priority group, priority planning group, flexible integration group, and long-term planning group. Policymakers refer to the distributions of those factors in Policy Schema and resources available for decision-making. A remarkable and effective flight safety improvement with minimum investment should be expected.
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Wu, Chia-te, and 吳家德. "Analysis of operation strategy in architecture business." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/74956606658062354572.
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CHEN, HORN NAN, and 陳宏男. "Analysis on Dimming Operation of Fluorescent Lamps." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/37821887196533049534.
Full textAbstract:
碩士國立中山大學
電機工程研究所
84
An electric circuit model is developed for characterizing the electrical behavior of fluorescent lamps with dimming operation at high frequencies. The proposed model can be simply derived from three sets of measured data. This model can be used for predicting circuit behavior of dimmable electronic ballasts, and then to determine the circuit parameters and the adequate operating ranges. An electronic ballast with the series resonant inverter is built to realize two dimming operation methods, voltage control and frequency control. The design considerations including operating frequency, starting voltage, filament current, and control sensitivity factor are discussed in detail. Experimental tests are found to be quite in agreement with the simulation results based on the proposed model.
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Chang, You-Wei, and 張有為. "Analysis Operation Performance in Taiwan’s Banking Industry." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/75295782420120507279.
Full textAbstract:
碩士龍華科技大學
商學與管理研究所碩士班
95
This project uses data envelopment analysis to study the advantage and disadvantage between the efficiency Taiwan’s banking industry, and through the efficient reference set and slack variable analysis support an useful improvement to the authority. The conclusion of this project are：The main reason of a low bank overall efficiency is the managers of bank fails in making decisions and doing things efficiency. A lot of banks cause resource waste in unsuitable scale. The low efficiency of banks inside the financial holding company’s reason is the pure technology non-efficientcy. And the low efficiency of banks outside the financial holding company is almost causes by scale non-efficiency. From this we can gain a conclusion, the low efficiency of banks inside the financial holding company can be improved from the manage side by finding a most suitable cost allocation. And the low efficiency of banks outside the financial holding company can be reflected by the sliding of the business scale. Finally, this project used slack variable analysis it can gain the main reason that bank produced low efficiency. Using too much cost, deposit money, insufficient investment, and other over-less coming. That means the bank have the appearance of consuming resource, too much money is leaved unused, and over-conservative investment. Comparatively, that cuts other coming money.
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Su, Ding-Shen, and 蘇鼎盛. "Analysis of Operation and Reliability in Microgrid." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/59205676860978061507.
Full textAbstract:
碩士中原大學
電機工程研究所
100
Growing depletion of natural resources and the Kyoto Protocol have aroused global attention to renewable energies. In Taiwan, the goal of real power generation from renewable energies is 4% of total generation in 2012 and 18% in 2020. Although renewable energies can mitigate the green gas effect, penetration of these distributed generations may change the operation scheme in the utility. One of the solutions for keeping the power system intact is to embed these distributed generations in micro-grids. This thesis investigates the transient and dynamic conditions for the first outdoor microgrid test bed in Taiwan, whose generation capacity is 406.5-kW. The microgrid system includes gas turbine, wind-turbine and PV generations. The models of rectifier and inverter are considered for both transient and dynamic simulations. The component outage and wind variation are studied in transient/dynamic analyses. This thesis also applies failure mode and effect analysis (FMEA) to analyze the reliability. Preliminary simulation results reveal that the established microgrid can serve as a test bed for investigating the performance of power converter, pitch-angle control, governor, and exciter. The outage time can be reduced and the reliabilities for the system can be improved by including the power electronic devices to the gas turbine.
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Lee, Wei-Shan, and 李偉山. "Airline Route Cost Analysis for Chartered Operation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/8hqf87.
Full textAbstract:
碩士國立虎尾科技大學
航空與電子科技研究所
99
The purpose of this research is to analyze and evaluate the route costs for chartered airline operations. In contrast to traditional scheduled route airlines, who typically use unit cost per available seat-kilometer (ASM) or passenger seat-kilometer (PSK) as the performance index, charter airlines, being exempt from the risk of load factors concerns, normally adopt block-hour rate as the cost index. As for the cost structure for the operation of a flight route, this research focuses on analyzing the direct operating costs (DOC) because indirect operating costs may vary with company strategies and marketing requirements and have no definite judging standards. Many studies and literatures have been conducted on the analysis of direct operating cost for the airline operation. However, most researches failed to classify these cost items systematically, and therefore caused it difficult to analyze cost structure effectively to support the airline operation strategy or cost control. In view of the above deficiencies, the approach of this research proceeds in the following three aspects. Firstly, literatures on cost structure for the airline operations are reviewed. The cost items of DOC are categorized into five major groups, i.e., A (Aircraft), C (Crew), M (Maintenance), I (Insurance) and O (Operation). Characteristics of respective cost items are also discussed. Secondly, navigation and related charges are collected to construct the database. The data collected range from North-eastern Asia to South-eastern Asia, including major international airports in Japan, Korea, China, Hong Kong, Taiwan, Philippines, Malaysia, Indonesia, Singapore, Thailand and Cambodia. A case study is then performed in the third part of the thesis for a charter airline, who intended to operate 「ICN-TPE-REP」 and 「PUS-TPE-REP」scheduled charter flights. The results show that the fuel cost has the biggest share and is over 44 % of the operation cost, which highlights the difficulties in cost-down control, especially for small-sized carriers, under current high-fuel price environment. Flight-related costs (the O-group) forms the second largest portion (26.7 %) of the operation cost, which may be the main field the airline may persue for cost down. On the other hand, maintenance, crews and aircraft cost, each including less than 15.2 %, respectively, of the operation cost, illustrate the facts that the common salary-cutting strategy of the direct operating personnel used by airline corporations may have little effects on the cost down. Although current research calculates the direct operating cost for a specific chartered route as a case study, the methodology, nevertheless, is also applicable for scheduled route cost evaluations. Based on the airport charges dataset we have established, the methodology of this research can be applied, with minor parameter modification, to support airline operation in evaluating route costs when they intend to operate scheduled as well as chartered regional flights in Eastern Asia.
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Wu, Jin-Cheng, and 吳晉誠. "China's Banking Industry Operation Performance Analysis Using Data Envelopment Analysis." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/w2f92f.
Full textAbstract:
碩士中國文化大學
全球商務碩士學位學程碩士班
106
Based on the rapid development of various industries, China is already the largest market in the world. In the development of the country, the banking industry is one of the core industries in the state. It is related to the flow of capital and capital in a country’s economic development and most closely linked with the enterprises and the people. This study collected 55 Chinese banks data from Taiwan Economic Journal in the period of 2011-2016, and divided them into three categories, State-owned Commercial Bank, National non-state-owned Bank, and City Commercial Bank. This research uses the Data Envelopment Analysis and Malmquist to analyze the operation performance of China’s banking industry and selects deposit from customers, interest expense and commission expense as inputs variables and operating profit, interest income and commission income as outputs variables from TEJ database. The average efficiency of the overall banking industry in China from 2011 to 2016 was 0.941, which can be said to be efficient. However, according to the Malmquist index and Return to scale analysis, the entire Chinese banking industry has experienced a decline situation. It might be some problems in the internal operations management and technical management. It is necessary to develop new financial technology and products as well as explore new market in order to strive for a survival niche market. The significant different size of scale in the three categories has deeply affected the banking operation efficiency and financial technology. It indicates that the large bank has better resource to attract distinguished human resource and could invest in advanced technologies.
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Chun, Liu Yu, and 劉毓鈞. "The civil-military operations in war of ideas: The Empirical Analysis of Operation Enduring Freedom." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/57968658509885417237.
Full textAbstract:
碩士國防大學政治作戰學院
政治研究所
101
On November 11th, 2001, New York World Trade Center in the United States was attacked by Islamic extremists with four hijacked airplanes and resulted in more than three thousand people dead in this calamity. American president, George W. Bush, vowed to use the powerful military strength as the backup to declare the war against the terrorists and their asylum seekers in his congress speech on November 20, 2001. American government united NATO allies and Afghan Northern alliance to start the attack against Taliban regime. In the beginning of the war, everything seemed to be under the union army's control and it overthrew Taliban regime at the end of 2001. It also fostered the western provisional government. Nevertheless, the leader of Al-Quaeda and Taliban organization fled and the wars in Afghanistan kept on going. The war in Afghanistan is America's longest war ever, but it is not easy for the states to relinquish the war just like Vietnam War. As stated by David Richards, the British Army Chief of staff, America and western union would lose the authority and prestige if they lost the war because it would represent the Al-Qaeda and Taliban terrorists defeat the most powerful America and NATO alliance, which will encourage world-wide Islamic militants to rush to follow suit. This essay is to mainly analyze the Afghanistan war, which is the non-traditional type of war but a counterinsurgency warfare. American army has to give up the traditional way to defeat its enemy, and make use of the non-traditional type of war based on people's power to force the terrorists and rebel groups to lose people's support and economy backup. The design of American Civil-Military Operations is to strive for people's heart and support to raise the military efficiency. However, the military commander did not manipulate the strategy well at the beginning of the war until the International Security Force adjusted the whole tactics in 2004 by studying more researches of British and American rebel war literatures and gradually transferred the focus to Afghanistan people. After McChrystal,, the top general, took charge and became the chief commander in 2009, he revealed the importance of striving for people's support in this war. At last, we can find the importance and the trend of Civil-Military Operations in the non-traditional war in the future. Because the wars in the future contains lots of concepts, it is an important task to gain people's heart and support in the wars. Therefore, the Civil-Military Operation plays an important role in the wars in the future.
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Tien, Kuo, and 張國田. "Analysis on Accident of Operation of Mobile Crane." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/74116650349365389563.
Full textAbstract:
碩士國立雲林科技大學
環境與安全工程系碩士班
93
This Thesis research about Mobile Crane is the most important machine in industry. If it is bad to design in addition, will operate the improper factor in the future, it is apt to cause the boom to destroy, cause great danger and loss. This Research object is marking boom of TR-500M wheel competent type crane made by TADANO Company of Japan ，once happened boom rupture occupational accident of「O section project newly-built of O highway」 D project Co., Ltd. hiring labor falling calamity in engaged in the moulds lasting job in Miaoli County. In this case, besides probing into the reason of the accident and violating the regulation of the decree ，then hanging the external force on the to section six of the boom and make intensity analysis . Besides using the finite element analysis software ANSYS to analysis, and then cooperate with the traditional computing technology and portable hoist computer auxiliary examination software of The Institute of Occupational Safety and Health (IOSH) and self-made Excel computer program analyses result to compare, prove each other that judges whether the analysis result is correct. According to the result of analysis, ANSYS analyses and self-made computer program analyses that is close to traditional result of calculation, and can do stress analysis with the practical operation situation. It is worth consulting to represent the finite element analyses and self-made computer program analyses. And analysis with the computer auxiliary examination software and self-made computer program that learning, the boom of crane has already gone beyond one''s own intensity of destruction of its structural material while carrying on the operation, it is already in dangerous state to represent the boom and operate at that time, command personnel and hold attention to all fail to find and take the proper precautionary measures in time, cause the Occupational Accident to take place. So, the objective of this research is besides probing into the reason of the Occupational Accident and improve the measure to endanger by reducing it further .In purpose of this research, it can to help justice to some safety of crane, in order to reduce Occupational Accident, to maintain labor in safe.
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Wang, Yu-Hsiang, and 王郁翔. "Behavior Sequence Analysis Based on Software Operation Testing." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/pkb4af.
Full textAbstract:
碩士國立臺中教育大學
資訊工程學系
102
Conventional paper and pencil testing are mostly True/False and multiple choices that the achievement and final score can only be revealed at the end of the test. It is hard to investigate how students realize and familiarize the question, and there is also lack of the operational records for further investigating. For the past decade, with the rapid development of information technology, Interactive online testing is gradually replacing the conventional paper and pencil testing. It cannot only increase students’ learning motivation, and also allows more students to perform test at the same time. Besides, it also helps decrease the time and manpower while teachers correct the students’ answers; the auto-marking and the operational processes can be performed automatically. To analysis the log file can understand the behavior when student operation in test, that can help system designer to modify the system module which is difficultly to use. Our previous studies – ITIS records students’ operations while they are performing testing. Through investigating the operational logs, which help the understanding of students’ behavior. It can also help recognize the true answer operations but not by randomly guessing answers. In this thesis, three analysis models are applied and formalized to analyze students’ operational behavior, including (1) The answering model between questions, (2) The answering model of interactive testing answering skills, and (3) The answering model of step-based test items. The corresponding automatic analysis tools are developed to investigate their behavior patterns. This thesis also conducts experiments to collect the experimental data, which are automatically encoded from their operational patters for further analysis. The sequential behavior analysis method is also introduced to find the variance of diverse behavior patterns. Therefore, several long-term variances of different students’ sequential behaviors are investigated.
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WU, CHIA-HUNG, and 吳家宏. "An Analysis of Internet Banking Operation in China." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/26a5g2.
Full textAbstract:
碩士國立臺北大學
企業管理學系
105
The popularities of internet, IOT and cloud computing related products and application service lead the third wave of the technology industry. The internet finance, it changes the people’s behavior pattern for payment and has gradually replaced the traditional finance, even brings the challenge to financial industry. The internet finance was well-developed in Europe and America, and plays an important role by degrees. “Internet Finance” is defined as a new type of financial business model whereby traditional financial institutions and Internet enterprises make use of Internet technology and information and communication technologies to achieve fund raising and circulation, payment and investment, and provide information intermediary services. The State Council of the People’s Republic of China agreed the first batch of five private banks to set the rule for online banking on March 2014. The five private banks had started the business, which are Webank, KinCheng Bank of Tianjin, Wenzhou Minshang Bank, Zhejiang Mybank Co. Ltd. and Shanghai HuaRui Bank. The research is to explore the strengths, weaknesses and the future trends in Internet finance in China.
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Pin-YuChen and 陳品妤. "Safety Analysis of Flight Operation Quality Assurance Data." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/94626903841797720299.
Full textAbstract:
碩士國立成功大學
民航研究所
98
The goal of this research is to explore the feasibility of quantifying the safety of flight operation by using engineering tools. With singular value decomposition, the recorded flight data were decomposed into the mutually independent information. With U matrix, it is possible to reveal the stability and divergence of flight situations by analyzing the records from normal flights, Nagoya accident, and Toa-Yuan accident. With eigenvalue, it is also possible to reveal the stability and divergence of flight situations. The preliminary results of this study show that the quantification of flight safety is basically possible. The stability of flight can be measured through the variations of the singular situation vectors and eigenvalue.
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Huang, Chang-Tien, and 黃章典. "Analysis of Operation Models of Patent Licensing Transactions." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/27042160568652399248.
Full textAbstract:
碩士國立臺灣大學
商學組
101
Patent licensing transactions are of crucial importance in Taiwan. It is said that in order to legally obtain intangible assets such as technologies for utilization and application, Taiwanese companies pay annual royalties of around 150 billion New Taiwan Dollars to American, European, and Japanese companies. It has been a long time for Taiwanese companies to earn profits by importing foreign technologies to increase the value of their manufacturing processes and/or products. In recent years, the trend has gradually shifted to a stronger focus on R&D and creation, resulting in an accumulation of intangible assets among Taiwanese companies. How to commercialize these intangible assets has also become an important topic. This thesis focuses on types of patent licensing transaction, consideration and motivation of the parties to transaction, types of transacting parties, licensing strategies of successful multinational enterprises, and studies on factors that influence royalty rates, royalty rates in various industries, as well as the business models of patent licensing entities, etc. Knowing what factors influence royalty rates may facilitate licensing transactions. This thesis has also found that many leading multinational companies also license-in technologies by open innovation. Patent licensing is not of value only to less competitive enterprises. In addition, it is advisable for Taiwanese enterprises to observe the development or even to participate in the major IP management entity in order to cope with global patent battle.