Дисертації з теми "Operating models"
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Gupta, Budhaditya. "Essays on External Context and Operating Models." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:32744399.
Повний текст джерелаAl-Ojaimi, Abdulkarim. "Evidence based models for evaluating operating room performance." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/47338/.
Повний текст джерелаCorbett, Philip. "Accuracy of logistic models and receiver operating characteristic curves." Thesis, University of Warwick, 2001. http://wrap.warwick.ac.uk/4114/.
Повний текст джерелаTing, Chung-wu. "Estimating operating and support cost models for U.S. Naval ships." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA277755.
Повний текст джерелаThesis advisor(s): Katsuaki Terasawa ;Gregory G. Hildebrandt ; Dan C. Boger. ."December 1993." Bibliography: p. 73. Also available online.
Wu, Ming-Cheng. "Estimating operating and support models for U.S. Air Force Aircraft." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA376488.
Повний текст джерелаThesis advisor(s): Hildebrandt, Gregory G. ; Liao, Shu S. "March 2000." Includes bibliographical references (p. 57-59). Also available in print.
Feng, Ming-Fa. "Fault diagnosis and prediction in reciprocating air compressors by quantifying operating parameters." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/39786.
Повний текст джерелаPh. D.
Lu, Ming. "System Dynamics Model for Testing and Evaluating Automatic Headway Control Models for Trucks Operating on Rural Highways." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-01292008-113749/.
Повний текст джерелаRojas, Jose Angel. "Relationship between the sludge settling characteristics and the parameters of the activated sludge system." ScholarWorks@UNO, 2004. http://louisdl.louislibraries.org/u?/NOD,171.
Повний текст джерелаTitle from electronic submission form. "A thesis ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Environmental Engineering."--Thesis t.p. Vita. Includes bibliographical references.
Wang, Jun. "Operating Speed Models for Low Speed Urban Enviroments based on In-Vehcile GPS." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10508.
Повний текст джерелаZheng, Liying. "Operating Room Version of Safety Attitudes Questionnaire – An Analysis Using Structural Equation Models." Thesis, Uppsala universitet, Statistiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-175920.
Повний текст джерелаWang, Jun. "Operating speed models for low speed urban environments based on in-vehicle GPS." Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-03292006-111130/.
Повний текст джерелаGEARA, TONY GEBRAEL. "Improved Models for User Cost Analysis." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1212144622.
Повний текст джерелаGong, Huafeng. "OPERATING SPEED PREDICTION MODELS FOR HORIZONTAL CURVES ON RURAL FOUR-LANE NON-FREEWAY HIGHWAYS." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/562.
Повний текст джерелаEusuff, M. Muzaffar. "Optimisation of an operating policy for variable speed pumps using genetic algorithms." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09ENS/09ense91.pdf.
Повний текст джерелаJordan, Ramiro. "A derivation of the probability distribution function of the output of a square-law detector operating in a jamming environment." Thesis, Kansas State University, 1985. http://hdl.handle.net/2097/9854.
Повний текст джерелаGong, Huafeng. "Operating speed preditcion [sic] models for horizontal curves on rural four-lane non-freeway highways." Lexington, Ky. : [University of Kentucky Libraries], 2007. http://hdl.handle.net/10225/727.
Повний текст джерелаTitle from document title page (viewed on March 25, 2008). Document formatted into pages; contains: x, 182 p. : ill. (some col.). Includes abstract and vita. Includes bibliographical references (p. 136-149).
Arumí, Albó Pau. "Real-time multimedia on off-the-shelf operating systems: from timeliness dataflow models to pattern languages." Doctoral thesis, Universitat Pompeu Fabra, 2009. http://hdl.handle.net/10803/7558.
Повний текст джерелаSoftware-based multimedia systems that deal with real-time audio, video and graphics processing are pervasive today, not only in desktop workstations but also in ultra-light devices such as smart-phones. The fact that most of the processing is done in software, using the high-level hardware abstractions and services offered by the underlying operating systems and library stacks, enables for quick application development. Added to this exibility and immediacy (compared to hardware oriented platforms), such platforms also offer soft real-time capabilities with appropriate latency bounds. Nevertheless, experts in the multimedia domain face a serious challenge: the features and complexity of their applications are growing rapidly; meanwhile, real-time requirements (such as low latency) and reliability standards increase. This thesis focus on providing multimedia domain experts with workbench of tools they can use to model and prototype multimedia processing systems. Such tools contain platforms and constructs that reect the requirements of the domain and application, and not accidental properties of the implementation (such as thread synchronization and buffers management). In this context, we address two distinct but related problems: the lack of models of computation that can deal with continuous multimedia streams processing in real-time, and the lack of appropriate abstractions and systematic development methods that support such models. Many actor-oriented models of computation exist and they offer better abstractions than prevailing software engineering techniques (such as object-orientation) for building real-time multimedia systems. The family of Process Networks and Dataow models based on networks of connected processing actors are the most suited for continuous stream processing. Such models allow to express designs close to the problem domain (instead of focusing in implementation details such as threads synchronization), and enable better modularization and hierarchical composition. This is possible because the model does not over-specify how the actors must run, but only imposes data dependencies in a declarative language fashion. These models deal with multi-rate processing and hence complex periodic actor's execution schedulings. The problem is that the models do not incorporate the concept of time in a useful way and, hence, the periodic schedules do not guarantee real-time and low latency requirements. This dissertation overcomes this shortcoming by formally describing a new model that we named Time-Triggered Synchronous Dataow (TTSDF), whose periodic schedules can be interleaved by several time-triggered activations" so that inputs and outputs of the processing graph are regularly serviced. The TTSDF model has the same expressiveness (or equivalent computability) than the Synchronous Dataow (SDF) model, with the advantage that it guarantees minimum latency and absence of gaps and jitter in the output. Additionally, it enables run-time load balancing between callback activations and parallelization. Actor-oriented models are not off-the-shelf solutions and do not suffice for building multimedia systems in a systematic and engineering approach. We address this problem by proposing a catalog of domain-speciffic design patterns organized in a pattern language. This pattern language provides design reuse paying special attention to the context in which a design solution is applicable, the competing forces it needs to balance and the implications of its application. The proposed patterns focus on how to: organize different kinds of actors connections, transfer tokens between actors, enable human interaction with the dataow engine, and finally, rapid prototype user interfaces on top of the dataow engine, creating complete and extensible applications. As a case study, we present an object-oriented framework (CLAM), and speciffic applications built upon it, that makes extensive use of the contributed TTSDF model and patterns.
Tuch, Harvey Computer Science & Engineering Faculty of Engineering UNSW. "Formal memory models for verifying C systems code." Publisher:University of New South Wales. Computer Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41233.
Повний текст джерелаSchmidt, Stephan. "A cost-effective diagnostic methodology using probabilistic approaches for gearboxes operating under non-stationary conditions." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/61332.
Повний текст джерелаDissertation (MEng)--University of Pretoria, 2016.
Mechanical and Aeronautical Engineering
MEng
Unrestricted
Kafka, Jan. "Analýza trhu operačních systémů." Master's thesis, Vysoká škola ekonomická v Praze, 2012. http://www.nusl.cz/ntk/nusl-198871.
Повний текст джерелаWelsch, Manuel. "Enhancing the Treatment of Systems Integration in Long-term Energy Models." Doctoral thesis, KTH, Energisystemanalys, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134100.
Повний текст джерелаSäker och prisvärd tillgång till energitjänster är en central fråga för dagens samhällen. För att tillgodose samhällen med hållbara energitjänster bör energisystemen designas för att – bland annat – möta de miljömässiga kraven samt hantera potentiellt begränsade resurser. Den här avhandlingen undersöker de ”smarta” elnätens roll för bättre tillhandahållande av energitjänster. Avhandlingen behandlar integration av förnybar energiteknik för minskad klimatpåverkan samt demonstrerar ett tillvägagångssätt för att förena potentiellt motstridiga energi-, vatten- och markanvändningsstrategier. Dessa uppvisar särskilda utmaningar i energisystemanalyser. Datorstödda modeller kan användas för att identifiera energisystem som på effektivast sätt möter samhällets krav. Datorstödda modeller är, per definition, förenklingar av verkligheten och det är därför viktigt att säkerställa en korrekt representation av det verkliga systemets dynamik. Den här avhandlingen förstärker energisystemmodeller för långsiktsprognoser utifrån tre aspekter: förbättra integrationen av (A) tillgång och efterfrågan genom smarta elnät; (B) olika tidsaspekter genom att inkludera kortsiktiga operativa begränsningar; samt (C) resurssystem genom att sammanlänka olika modelleringsverktyg. I del A utforskades de smarta elnätens potential för att förbättra elektriska system i utvecklingsländer. En befintlig energisystemmodell förstärktes för att behandla smarta elnät och kan därmed fånga fördelarna förknippade med energilagring och energianvändning. I del B utvidgades en energisystemmodell för långsiktsprognoser med flexibilitet för kortsiktiga operativa begränsningar. En fallstudie fokuserad på ett vindkraftsdominerat irländskt elnät genomfördes för att demonstrera fördelarna av modellutvecklingen. I del C kalibrerades en energisystemmodell för att ta klimatscenarier i beaktande samt energisystemets kopplingar till markanvändning och vattenresurssystem. En fallstudie fokuserad på Mauritius energisystem genomfördes för att undersöka konsekvenserna av en potentiell introducering av biobränslen. Avhandlingen demonstrerar att undermålig integration av energimodeller och resurssystem kan leda till avsevärda avvikelser i resultaten. Slutsatser som dras utifrån dessa resultat kan därmed leda till vitt skilda – och potentiellt felaktiga – underlag för investeringar och energipolitiska rekommendationer.
QC 20131118
Pegado, Ana Maria Mesquita de Oliveira. "Gestão de bloco operatório : modelos de gestão e monitorização." Master's thesis, Escola Nacional de Saúde Pública. Universidade Nova de Lisboa, 2010. http://hdl.handle.net/10362/5468.
Повний текст джерелаChen, Xiujuan. "Computational Intelligence Based Classifier Fusion Models for Biomedical Classification Applications." Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/cs_diss/26.
Повний текст джерелаPouget, Kevin. "Debogage Interactif des systemes embarques multicoeur base sur le model de programmation." Phd thesis, Université de Grenoble, 2014. http://tel.archives-ouvertes.fr/tel-01010061.
Повний текст джерелаWalton, Nigel. "The extent to which data-rich firms operating two-sided platform-ecosystem business models are able to use data to gain an innovation advantage over established one-sided companies." Thesis, Coventry University, 2017. http://eprints.worc.ac.uk/6313/.
Повний текст джерелаDe, Vries Marne. "A process reuse identification framework using an alignment model." Thesis, University of Pretoria, 2013. http://hdl.handle.net/2263/31634.
Повний текст джерелаThesis (PhD)--University of Pretoria, 2013.
Industrial and Systems Engineering
Unrestricted
Gorjian, Nima. "Asset health prediction using the explicit hazard model." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/57314/1/Nima_Gorjian_Jolfaei_Thesis.pdf.
Повний текст джерелаOjong, Emile Tabu [Verfasser], Hans Joachim [Gutachter] Krautz, and Heinz Peter [Gutachter] Berg. "Characterization of the performance of PEM water electrolysis cells operating with and without flow channels, based on experimentally validated semi-empirical coupled-physics models / Emile Tabu Ojong ; Gutachter: Hans Joachim Krautz, Heinz Peter Berg." Cottbus : BTU Cottbus - Senftenberg, 2018. http://d-nb.info/1172718202/34.
Повний текст джерелаDe, Montfort Pierre Juan. "A model of co-operative education on peace support operations in Africa." Thesis, [Bloemfontein?] : Central University of Technology, Free State, 2007. http://hdl.handle.net/11462/67.
Повний текст джерелаThe focus of this study is on a Model of Co-operative Education on Peace Support Operations (PSO) in Africa. PSO are multi-functional operations involving military forces and diplomatic humanitarian agencies. They are designed to achieve humanitarian goals or a long-term political settlement, and are conducted impartially in support of a UN mandate. These include peacekeeping (PK), peace enforcement (PE), conflict prevention, peacemaking, peace building, and humanitarian operations. Since the advent of democracy in 1994, domestic and international expectations have steadily grown regarding a new South African role as a responsible and respected member of the international community. These expectations have included a hope that South Africa will play a leading role in a variety of international, regional and sub-regional forums, and that the country will become an active participant in attempts to resolve various regional and international conflicts. Peacekeeping is becoming more and more important as South Africa plays a vital role in African missions, mandates, deployment and restructuring. The core of peacekeeping operations in Africa is no longer about the deployment of armed forces, but the focus is shifting towards a more integrated approach including reconstruction, development, stability, civilian involvement and humanitarian aspects. While skills required for peace operations overlap with those required for war, there is increasing recognition that additional peace operations training is needed to successfully conduct these missions. The demand, advancement and application of peacekeeping evolve worldwide, especially in Africa, where enormous funding is being poured into local research and development, testing and training. The market for Education, Training and Development (ETD) in the field of PSO is growing, as South Africa is becoming increasingly involved in peacekeeping missions on the African continent. At present, there is no Co-operative Education programme on generic PSO on the operational/strategic level presented by any of the major universities in South Africa in order to enhance other PSO training. The objectives of this research project are in phase one: • To determine the need for and feasibility of a Co-operative Education Program on PSO. • To write a instructional design (ISD) report for a Co-operative Education Model on PSO and, • To draft possible curriculum content. • The second phase of the project could involve the development of learning material, and the evaluation of the proposed Co-operative Education Model on PSO by running a pilot programme. The principal product (output) of this research will consist out of an ISD report on a Model for Co-operative Education on PSO in Africa, presented by means of Correspondence Instruction with contact sessions. The key factors in production of the learning program include geo-political and security studies in order to create an understanding of the African battle space, PSO as presented by UNITAR POCI, the assessment of international practice with regards to PSO in order to relate the information to operations in Africa, PSO on the African continent, and Civil-Military Cooperation.
Youssef, Joseph. "Developing an enterprise operating system for the monitoring and control of enterprise operations." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0761/document.
Повний текст джерелаOperating System (OS) is a well-known concept in computer science as an interface between human and computer hardware (MacOS, Windows, IOS, Android,…). In the perspective of developing future generation of enterprise systems based on IoT and Cyber-Physical System principles, this doctorate research proposes to develop an Enterprise Operating System (EOS); Unlike ERP, which is defined as a platform that allows the organization at the operational level to use a system of integrated applications in order to automate many back office functions related to technology and services, EOS will act as an interface between enterprise business managers and enterprise resources for real time monitoring and control of enterprise operations.The thesis presents at first the context, priorities, challenges and expected results. Then a set of requirements and functionalities of EOS is described. After that, a survey on existing relevant works is given and mapped to the specified requirements related to EOS. Afterwards, and based on the requirements and state-of-the-art results, the EOS conceptual, technical and implementation architectures are outlined including all internal and external components. The last part draws two examples in the banking and manufacturing sectors to illustrate the use of the EOS
Paxton, Blaine Kermit. "The Dell operating model." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/34778.
Повний текст джерелаIncludes bibliographical references (p. 62-63).
Dell, Inc. is well known for its dramatic and continually improving operational performance in terms of unit cost, inventory level, production capacity, and labor efficiency. However, in late 2002, several members of Dell's Americas operations group realized that they did not fully understand what was driving this operational excellence. Therefore, they decided to sponsor an MIT Leaders for Manufacturing internship project to find out. The goal of this project was to "identify and document the essential beliefs, principles, and practices that have contributed to the operations success at Dell". The result of this endeavor is a model which describes four beliefs that are widely shared between members of Dell's operations organizations. These four beliefs (or cultural elements) are, in turn, supported by a set of specific management practices and programs. This model was developed using qualitative organizational research methods including conducting semi-structured interviews, holding focus groups, and gathering individual feedback on a draft version of the model for final validation. In this thesis, the "Dell Operating Model" is described, and each element of the model is shown to support Dell's critical business objectives. The model is then examined through the lenses of three organizational frameworks, and the limitations of these alternate frameworks are discussed. Finally, the applicability of the model to other companies is discussed, and new projects are proposed that will build on this research.
by Blaine Paxton.
S.M.
M.B.A.
Verdi, Marcio. "Prediçao de distribuíção de espécies arbustivo-arbóreas no sul do Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/115515.
Повний текст джерелаIn view of environmental change on a global level, providing ecological information and getting a better understanding of the factors and processes that shape species distribution is an important initiative for planning conservation actions. In this context, the importance and lack of information about the geographical distribution of species motivated us to predict the potential species distribution of shrubs and trees of the family Lauraceae and Myrtaceae, in the Atlantic Forest in southern Brazil. Generalized linear models (GLM) were used to fit predictive models with records of occurrence of 88 species according to environmental variables. Predictor variables were selected based on the lowest corrected Akaike information criterion. We evaluate the performance of the models using the method of cross-validation (10-fold) to calculate the true skill statistic (TSS) and area under the receiver operator characteristic curve (AUC). We used GLM to test the influence of the area of occurrence estimated, the number of records of the species and the complexity of the models on the TSS and AUC. Our results show that climatic variables largely govern the distribution of species, but the variables that capture the local environmental variations are relatively important in the study area. The TSS was significantly influenced by the number of records and complexity of models while the AUC suffered from the effect of all three evaluated factors. The interaction between these factors is an important issue and be considered for new reviews on both measures and with different modeling techniques. Our results also showed that the distributions of some species were overestimated and other corresponded well with the occurrence known to us. Indeed our results have foundations to support new field surveys, assessment of priority areas and conservation plans, and inferences of the effects of environmental change on species of the Atlantic Forest.
Wiedemann, Michael. "Robust parameter design for agent-based simulation models with application in a cultural geography model." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Jun/10Jun%5FWiedemann.pdf.
Повний текст джерелаThesis Advisor(s): Johnson, Rachel T. ; Second Reader: Baez, Francisco R, "June 2010." Description based on title screen as viewed on July 15, 2010. Author(s) subject terms: Cultural Geography, Agent-Based Model (ABM), Irregular Warfare (IW), Theory of planned Behavior (TpB), Baysian Belief Nets (BBN), Counterinsurgency Operations (COIN), Stability Operations, Discrete Event Simulation (DES), Design of Experiments (DOX), Robust Parameter Design (RPD). Includes bibliographical references (p. 69-70). Also available in print.
Nadai, Carolina Camargo de. "Gambiarração: poéticas em composição coreográfica." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/27/27156/tde-30052017-142002/.
Повний текст джерелаThe hypothesis here constructed is that from the notion of gambiarra, gambiarração can be understood as a way for the body to operate devices for dance composition. In this way, it becomes relevant to think about the daily practices, seen in Michel de Certeau as poetic productions that trigger formulations about the immanent relations to the production of gambiarras, as well as make possible to perceive a power for the creation of procedures and actions directed to the artistic composition. Within the framework of choreographic compositions, the Real Time Composition method, developed by the portuguese choreographer João Fiadeiro since the beginning of the 1990s, and the AND Operational Mode, structured by the anthropologist Fernanda Eugénio, were responsible for sharing senses that compose with The subject gambiarra, contributing to the research in its theoretical-practical unfolding. Thus, the notion of gambiarração appears as a state of action of and in the body, perceptions that are also ways of doing or of being that operate in the likeness of gambiarras, from the improvisation, the ability to act actions in real time, to deal With accidents, with instability and precariousness and with the sufficiency of what there is in a certain compositional circumstance. We have identified in the thinking of Baruch Spinoza and Gilles Deleuze (and Félix Guattari) ways of perceiving affection, body, experience and composition, which strengthen this artistic proposition.
Marshall, Jak. "Models of intelligence operations." Thesis, Lancaster University, 2016. http://eprints.lancs.ac.uk/81659/.
Повний текст джерелаТевяшев, А. Д., О. І. Матвієнко, and Г. В. Никитенко. "Stochastic Model of Operating Modes of a Group of Artesian Wellsin Water Supply Systems." Thesis, ХНУРЕ, 2020. https://openarchive.nure.ua/handle/document/16411.
Повний текст джерелаNageswaran, Leela A. "Innovative Models in Service Operations." Research Showcase @ CMU, 2018. http://repository.cmu.edu/dissertations/1197.
Повний текст джерелаFei, Qi. "Operation models for information systems /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?IELM%202009%20FEI.
Повний текст джерела林紹健 and Siu-kin Lum. "Trimming operations for geometric modelling." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31211732.
Повний текст джерелаLum, Siu-kin. "Trimming operations for geometric modelling /." [Hong Kong : University of Hong Kong], 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13857733.
Повний текст джерелаТевяшев, А. Д., О. І. Матвієнко, and Г. Нікітенко. "Stochastic Model and Method of Optimizing the Operating Modes of a Water Network with Hidden Leaks." Thesis, Харків : ТОВ «Друкарня Мадрид», 2018. http://openarchive.nure.ua/handle/document/9410.
Повний текст джерелаMorales, Juan Carlos. "Planning Robust Freight Transportation Operations." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14107.
Повний текст джерелаLEAL, HELOISA REIS. "BOOLEAN OPERATIONS ON POINT-BASED MODELS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5881@1.
Повний текст джерелаOperações booleanas em modelagem 3D são usadas para criar novos modelos ou para modificá-los. Na maioria dos tipos de representação de objetos 3D, estas operações são bastante complexas. Nos últimos anos tem sido muito explorado um novo tipo de modelagem, a modelagem por pontos, que apresenta muitas vantagens em relação às outras representações como maior simplicidade e eficiência. Dois trabalhos exploram as operações booleanas na modelagem por pontos, o trabalho de Adams e Dutré e o trabalho de Pauly et. al. Dada a grande importância deste novo tipo de modelagem e do uso de operações booleanas, esta dissertação apresenta uma introdução à modelagem por pontos, implementa o algoritmo proposto em Adams e Dutré com algumas melhorias e o compara com o método de Pauly et. al.
Boolean operations are used to create or modify models. These operations in the majority of 3D object representations are very complex. In the last years a significant trend in computer graphics has been the shift towards point sampled 3D models due to their advantages over other representations, such as simplicity and efficiency. Two recent works present algorithms to perform interactive boolean operations on point-based models: the work by Adams and Dutré and the work by Pauly et. Al.. Due to great importance of this novel representation and of the use of boolean operations, the present work makes an introduction to point-based representation, implements the algorithm proposed by Adams and Dutré with some improvements, and compares this implementation with the work by Pauly et. al..
Li, Kevin Bozhe. "Multiperiod Optimization Models in Operations Management." Thesis, University of California, Berkeley, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13423656.
Повний текст джерелаIn the past two decades, retailers have witnessed rapid changes in markets due to an increase in competition, the rise of e-commerce, and ever-changing consumer behavior. As a result, retailers have become increasingly aware of the need to better coordinate inventory control with pricing in order to maximize their profitability. This dissertation was motivated by two of such problems facing retailers at the interface between pricing and inventory control. One considers inventory control decisions for settings in which planned prices fluctuate over time, and the other considers pricing of multiple substitutable products for settings in which customers hold inventory as a consequence of stockpiling when promotional prices are offered.
In Chapter 1, we provide a brief motivation for each problem. In Chapter 2, we consider optimization of procurement and inventory allocation decisions by a retailer that sells a product with a long production lead time and a short selling season. The retailer orders most products months before the selling season, and places only one order for each product due to short product life cycles and long delivery lead times. Goods are initially stored at the warehouse and then sent to stores over the course of the season. The stores are in high-rent locations, necessitating efficient use of space, so there is no backroom space and it is uneconomical to send goods back to the warehouse; thus, all inventory at each store is available for sale. Due to marketing and logistics considerations, the planned trajectory of prices is determined in advance and may be non-monotonic. Demand is stochastic and price-dependent, and independent across time periods. We begin our analysis with the case of a single store. We first formulate the inventory allocation problem given a fixed initial order quantity with the objective of maximizing expected profit as a dynamic program and explain both technical and computational challenges in identifying the optimal policy. We then present two variants of a heuristic based on the notion of equalizing the marginal value of inventory across the time periods. Results from a numerical study indicate that the more sophisticated variant of the heuristic performs well when compared with both an upper bound and an industry benchmark, and even the simpler variant performs fairly well for realistic settings. We then generalize our approaches to the case of multiple stores, where we allow the stores to have different price trajectories. Our numerical results suggest that the performance of both heuristics is still robust in the multiple store setting, and does not suffer from the same performance deterioration observed for the industry benchmark as the number of stores increases or as price differences increase across stores and time periods. For the pre-season procurement problem, we develop a heuristic based on a generalization of the newsvendor problem that accounts for the two-tiered salvage values in our setting, specifically, a low price during end-of-season markdown periods and a very low or zero salvage value after the season has concluded. Results for numerical examples indicate that our modified newsvendor heuristic provides solutions that are as good as those obtained via grid search.
In Chapter 3, we address a retailer's problem of setting prices, including promotional prices, over a multi-period horizon for multiple substitutable products in the same product category. We consider the problem in a setting in which customers anticipate the retailer's pricing strategy and the retailer anticipates the customers' purchasing decisions. We formulate the problem as a two-stage game in which the profit maximizing retailer chooses prices and the utility maximizing customers respond by making explicit decisions regarding purchasing and consumption, and thus also implicit decisions regarding stockpiling. We incorporate a fairly general reference price formation process that allows for cross-product effects of prices on reference prices. We initially focus on a single customer segment. The representative customer's utility function accounts for the value of consumption of the products, psychological benefit (for deal-seekers) from purchasing at a price below his/her reference price but with diminishing marginal returns, costs of purchases, penalties for both shortages and holding inventory, and disutility for deviating from a consumption target in each period (where applicable). We are the first to develop a model that simultaneously accounts for this combination of realistic factors for the customer, and we also separate the customer's purchasing and consumption decisions. We develop a methodology for solving the customer's problem for arbitrary price trajectories based on a linear quadratic control formulation of an approximation of the customer's utility maximization problem. We derive analytical representations for the customer's optimal decisions as simple linear functions of prices, reference prices, inventory levels (as state variables), and the cumulative aggregate consumption level (as a state variable). (Abstract shortened by ProQuest.)
Brabazon, Philip G. "Mass customization : fundamental modes of operation and study of an order fulfilment model." Thesis, University of Nottingham, 2006. http://eprints.nottingham.ac.uk/10182/.
Повний текст джерелаCouret, Marine. "Failure mechanisms implementation into SiGe HBT compact model operating close to safe operating area edges." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0265.
Повний текст джерелаIn an ever-growing terahertz market, BiCMOS technologies have reached cut-off frequencies beyond 0.5 THz. These dynamic performances are achieved thanks to the current technological improvements in SiGe heterojunction bipolar transistors (HBTs). However, these increased performances lead to a shift of the transistors bias point closer to, or even beyond, the conventional safe-operating-area (SOA). As a consequence, several "parasitic" physical effects are encountered such as impact-ionization or self-heating which can potentially activate failure mechanisms, hence limiting the long-term reliability of the electric device. In the framework of this thesis, we develop an approach for the description and the modeling of hot-carrier degradation occurring in SiGe HBTs when operating near the SOA edges. The study aims to provide an in-depth characterization of transistors operating under static and dynamic operating conditions. Based on these measurements results, a compact model for the impact-ionization and the self-heating has been proposed, ultimately allowing to extend the validity domain of a commercially available compact model (HiCuM). Considering the operation as close as possible to the SOA, an aging campaign was conducted to figure out the physical origin behind such failure mechanism. As a result, it has been demonstrated that hot-carrier degradation leads to the creation of trap densities at the Si/SiO2interface of the emitter-base spacer which induces an additional recombination current in the base. A compact model integrating aging laws (HiCuM-AL) was developed to predict the evolution of the transistor/circuit electrical parameters through an accelerated aging factor. For ease of use in computer-aided design (CAD) tools, the aging laws have been scaled according to the geometry and architecture of the emitter-base spacer. The model has demonstrated its robustness and its accuracy for different SiGe HBT technologies under various aging conditions. In addition, a study on the reliability of several integrated circuits has been performed leading to a precise location of the most sensitive regions to the hot-carrier degradation mechanism. Thus, the HiCuM-AL model paves the way to perform circuit simulations optimizing the mm-wave circuit design not only in term of sheer performances but also in term of long-term reliability
Messmacher, Eduardo B. (Eduardo Bernhart) 1972. "Models for project management." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9217.
Повний текст джерелаAlso available online at the DSpace at MIT website.
Includes bibliographical references (p. 119-122).
Organizations perform work essentially through operations and projects. The characteristics of projects makes them extremely difficult to manage: their non repetitive nature discards the trial and error learning, while their short life span is particularly unforgiving to misjudgments. Some authors have found that effective scheduling is an important contributor to the success of research and development (R&D), as well as construction projects. The widely used critical path method for scheduling projects and identifying important activities fails to capture two important dimensions of the problem: the availability of different technologies (or options) to perform the activities, and the inherent problem of limited availability of resources that most managers face. Nevertheless, when one tries to account for such additional constraints, the problems become very hard to solve. In this thesis we propose an approach to the scheduling problem using a genetic algorithm, and try to compare its performance to more traditional approaches, such as an extension to a very innovative Lagrangian relaxation approach recently proposed. The purpose of using genetic algorithms is twofold: first to obtain good approximations to very hard problems, and second to realize the limitations and virtues of this search technique. The purpose of this thesis is not only to develop the algorithms, but also to obtain insight about the implications of the additional constraints in the perspective of a project manager.
by Eduardo B. Messmacher.
S.M.
Lettovsky, Ladislav. "Airline operations recovery : an optimization approach." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/24326.
Повний текст джерелаZhai, Wensi. "A study of the co-working operating model." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108832.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (page 64).
After explosive development in the past half decade, the co-working industry is seeking changes to enhance the sustainability of its business model. Despite early success, the buy-bulk-sell-piece model does not promise a high return today due to the increasing cost of rent. Floating revenue and high fixed cost make the model fundamentally risky, imposing challenges for co-working companies to withstand the next recession. In the face of intensifying competition, major co-working players are expanding their businesses aggressively, aiming to benefit from economies of scale. The demand for funds is greater and more urgent than ever. Aside from commercial loans and venture capital, co-working companies are seeking more flexible and sustainable financing sources for growth. On the supply side, traditional real estate companies now have fewer doubts and greater interest in participating in the co-working business. While a small group have chosen to start their own spaces, more are looking for strategic cooperation with co-working players that have proven track records. This thesis conducted a study of the co-working operating model in an attempt to elucidate the optimal solution that benefits both sides of the business. Following a brief industry overview, it discusses the revenue and cost structure of the co-working space and the pros and cons of five co-working operating models. With that understanding, it constructs a DCF model of a mock-up co-working project and develops cash flows for both participants to analyze their return and risk profile under each operating model. The results suggest that the joint venture model is the optimal solution for co-working companies in business expansion, and property owners with passive investment positions. Further, the management model is the best choice for more matured co-working companies with strong brand influence and concentration on management service. It also indicates that the transformation from the lease model to the management and franchise model requires co-working companies to have a strong brand, proven track record, and an established member network. While for property owners, such transformation depends on its willingness of exposure to the co-working business, as well as the capital cost, risk tolerance, and investment horizontal.
by Wensi Zhai.
S.M. in Real Estate Development
Monsch, Matthieu (Matthieu Frederic). "Large scale prediction models and algorithms." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84398.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 129-132).
Over 90% of the data available across the world has been produced over the last two years, and the trend is increasing. It has therefore become paramount to develop algorithms which are able to scale to very high dimensions. In this thesis we are interested in showing how we can use structural properties of a given problem to come up with models applicable in practice, while keeping most of the value of a large data set. Our first application provides a provably near-optimal pricing strategy under large-scale competition, and our second focuses on capturing the interactions between extreme weather and damage to the power grid from large historical logs. The first part of this thesis is focused on modeling competition in Revenue Management (RM) problems. RM is used extensively across a swathe of industries, ranging from airlines to the hospitality industry to retail, and the internet has, by reducing search costs for customers, potentially added a new challenge to the design and practice of RM strategies: accounting for competition. This work considers a novel approach to dynamic pricing in the face of competition that is intuitive, tractable and leads to asymptotically optimal equilibria. We also provide empirical support for the notion of equilibrium we posit. The second part of this thesis was done in collaboration with a utility company in the North East of the United States. In recent years, there has been a number of powerful storms that led to extensive power outages. We provide a unified framework to help power companies reduce the duration of such outages. We first train a data driven model to predict the extent and location of damage from weather forecasts. This information is then used in a robust optimization model to optimally dispatch repair crews ahead of time. Finally, we build an algorithm that uses incoming customer calls to compute the likelihood of damage at any point in the electrical network.
by Matthieu Monsch.
Ph.D.