Дисертації з теми "Optimization-based modeling"
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Akhlagi, Ali. "A Modelica-based framework for modeling and optimization of microgrids." Thesis, KTH, Energiteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263037.
Повний текст джерелаYaoumi, Mohamed. "Energy modeling and optimization of protograph-based LDPC codes." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2020. http://www.theses.fr/2020IMTA0224.
Повний текст джерелаThere are different types of error correction codes (CCE), each of which gives different trade-offs interms of decoding performanceand energy consumption. We propose to deal with this problem for Low-Density Parity Check (LDPC) codes. In this work, we considered LDPC codes constructed from protographs together with a quantized Min-Sum decoder, for their good performance and efficient hardware implementation. We used a method based on Density Evolution to evaluate the finite-length performance of the decoder for a given protograph.Then, we introduced two models to estimate the energy consumption of the quantized Min-Sum decoder. From these models, we developed an optimization method in order to select protographs that minimize the decoder energy consumption while satisfying a given performance criterion. The proposed optimization method was based on a genetic algorithm called differential evolution. In the second part of the thesis, we considered a faulty LDPC decoder, and we assumed that the circuit introduces some faults in the memory units used by the decoder. We then updated the memory energy model so as to take into account the noise in the decoder. Therefore, we proposed an alternate method in order to optimize the model parameters so as to minimize the decoder energy consumption for a given protograph
Moore, Roxanne Adele. "Value-based global optimization." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44750.
Повний текст джерелаClough, Joshua Alan. "Modeling and optimization of turbine-based combined-cycle engine performance." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/2094.
Повний текст джерелаThesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Lam, Remi Roger Alain Paul. "Surrogate modeling based on statistical techniques for multi-fidelity optimization." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90673.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 71-74).
Designing and optimizing complex systems generally requires the use of numerical models. However, it is often too expensive to evaluate these models at each step of an optimization problem. Instead surrogate models can be used to explore the design space, as they are much cheaper to evaluate. Constructing a surrogate becomes challenging when different numerical models are used to compute the same quantity, but with different levels of fidelity (i.e., different levels of uncertainty in the models). In this work, we propose a method based on statistical techniques to build such a multi-fidelity surrogate. We introduce a new definition of fidelity in the form of a variance metric. This variance is characterized by expert opinion and can vary across the design space. Gaussian processes are used to create an intermediate surrogate for each model. The uncertainty of each intermediate surrogate is then characterized by a total variance, combining the posterior variance of the Gaussian process and the fidelity variance. Finally, a single multi-fidelity surrogate is constructed by fusing all the intermediate surrogates. One of the advantages of the approach is the multi-fidelity surrogate capability of integrating models whose fidelity changes over the design space, thus relaxing the common assumption of hierarchical relationships among models. The proposed approach is applied to two aerodynamic examples: the computation of the lift coefficient of a NACA 0012 airfoil in the subsonic regime and of a biconvex airfoil in both the subsonic and the supersonic regimes. In these examples, the multi-fidelity surrogate mimics the behavior of the higher fidelity samples where available, and uses the lower fidelity points elsewhere. The proposed method is also able to quantify the uncertainty of the multi-fidelity surrogate and identify whether the fidelity or the sampling is the principal source of this uncertainty.
by Rémi Lam.
S.M.
Paul, Ratnadeep. "Modeling and Optimization of Powder Based Additive Manufacturing (AM) Processes." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378113813.
Повний текст джерелаBracey, Marcus J. "Dynamic Modeling of Thermal Management System with Exergy Based Optimization." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1503682474459341.
Повний текст джерелаOremland, Matthew Scott. "Techniques for mathematical analysis and optimization of agent-based models." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/25138.
Повний текст джерелаPh. D.
Steffensen, Martin-Alexander. "Maritime fleet size and mix problems : An optimization based modeling approach." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18759.
Повний текст джерелаValentine, Jane E. "Modeling and optimization of a MEMS membrane-based acoustic-wave biosensor." Research Showcase @ CMU, 2013. http://repository.cmu.edu/dissertations/227.
Повний текст джерелаStanko, Milan Edvard Wolf. "Topics in Production Systems Modeling: Separation, Pumping and Model Based Optimization." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26826.
Повний текст джерелаMaragno, Donato. "Optimization with machine learning-based modeling: an application to humanitarian food aid." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21621/.
Повний текст джерелаWindmann, Andreas [Verfasser], and Petra [Akademischer Betreuer] Wagner. "Optimization-based modeling of suprasegmental speech timing / Andreas Windmann ; Betreuer: Petra Wagner." Bielefeld : Universitätsbibliothek Bielefeld, 2016. http://d-nb.info/112372718X/34.
Повний текст джерелаAgarwal, Neeraj 1975. "Neural network based modeling and simulation for the optimization of safety logic." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84313.
Повний текст джерелаHariri, Mahdiar. "A study of optimization-based predictive dynamics method for digital human modeling." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/2886.
Повний текст джерелаGarcés, Monge Luis. "Knowledge-based configuration : a contribution to generic modeling, evaluation and evolutionary optimization." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2019. http://www.theses.fr/2019EMAC0003/document.
Повний текст джерелаIn a context of mass customization, the concurrent configuration of the product and its production process constitute an important industrial challenge: Numerous options or alternatives, numerous links or constraints and a need to optimize the choices made. This problem is called O-CPPC (Optimization of Concurrent Product and Process Configuration). We consider this problem as a CSP (Constraints Satisfaction Problem) and optimize it with evolutionary algorithms. A state of the art shows that: i) most studies are illustrated with examples specific to an industrial or academic case and not representative of the existing diversity; ii) a need to improve optimization performance in order to gain interactivity and face larger problems. In response to the first point, this thesis proposes a generic model of the O-CPPC problem. This generic model is used to generate a realistic benchmark for evaluating optimization algorithms. This benchmark is then used to analyze the performance of the CFB-EA evolutionary approach. One of the strengths of this approach is to quickly propose a Pareto front near the optimum. To answer the second point, an improvement of this method is proposed and evaluated. The idea is, from a first approximate Pareto front, to ask the user to choose an area of interest and to restrict the search for solutions only on this area. This improvement results in significant computing time savings
Abdallah, Zeina. "Microwave sources based on high quality factor resonators : modeling, optimization and metrology." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30267/document.
Повний текст джерелаRF photonics technology offers an attractive alternative to classical electronic approaches in several microwave systems for military, space and civil applications. One specific original architecture dubbed as optoelectronic oscillator (OEO) allows the generation of spectrally pure microwave reference frequencies, when the microwave photonic link is used as a feedback loop. Various studies have been conducted during this thesis on the OEO, especially the one that is based on fiber ring resonators, in order to optimize and improve its phase noise performance and its long-term stability. Precise characterization and modeling of the optical resonator are the first step towards overall system design. The resonator metrology is performed using an original approach, known as RF spectral characterization. The experimental results have demonstrated that this technique is helpful for the identification of the resonator's coupling regime and the accurate determination of the main resonator parameters such as the intrinsic and extrinsic quality factors or the coupling coefficients. A second study was directed toward implementing a reliable nonlinear model of the system. In such a model, the fast photodiode require an accurate description, in order to reduce the conversion of the optical amplitude noise into RF noise. A new nonlinear equivalent circuit model of a fast photodiode has been implemented in a microwave circuit simulator: Agilent ADS. This new model is able to describe the conversion of the laser relative intensity noise (RIN) into microwave phase noise at the photodiode output. An optimal optical power at the photodiode's input has been identified, at which the contribution of the laser RIN in RF phase noise is negligible. When it comes to practical applications, the desired performance of an OEO is threatened by various disturbances that may result in a frequency shift of both the laser frequency and the transmission peak of the resonator, which causes a malfunction of the OEO. Therefore it is desirable to use a stabilization system to control the difference between the laser frequency and the resonator frequency. A series of tests and experiments have been carried out to investigate the possibility, on one hand, to replace the commercial servo controller that was used up until now in the Pound-Drever-Hall loop, with a low noise homemade one and, on the other hand, to use a semiconductor laser to reduce the system size. A detailed review of these approaches is presented
Zhao, Yongjun. "An Integrated Framework for Gas Turbine Based Power Plant Operational Modeling and Optimization." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/10580.
Повний текст джерелаWolf, Ailco, and Ailco Wolf. "Comprehensive geostatistical based parameter optimization and inverse modeling of North Avra Valley, Arizona." Thesis, The University of Arizona, 2002. http://hdl.handle.net/10150/626825.
Повний текст джерелаBither, Cheryl Ann, and Julie A. Dougherty. "A modeling strategy for large-scale optimization based on analysis and visualization principles." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28372.
Повний текст джерелаMagato, James. "Process Model and Sensor Based Optimization of Polyimide Prepreg Compaction During Composite Cure." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1533144776251201.
Повний текст джерелаZhao, Liang. "Reliability-based design optimization using surrogate model with assessment of confidence level." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/1194.
Повний текст джерелаLu, Tao. "A Metrics-based Sustainability Assessment of Cryogenic Machining Using Modeling and Optimization of Process Performance." UKnowledge, 2014. http://uknowledge.uky.edu/me_etds/47.
Повний текст джерелаBarceló, Adrover Salvador. "An advanced Framework for efficient IC optimization based on analytical models engine." Doctoral thesis, Universitat de les Illes Balears, 2013. http://hdl.handle.net/10803/128968.
Повний текст джерелаEn base a los desafíos surgidos a consecuencia del escalado de la tecnología, la presente tesis desarrolla y analiza un conjunto de herramientas orientadas a evaluar la sensibilidad a la propagación de eventos SET en circuitos microelectrónicos. Se han propuesto varias métricas de propagación de SETs considerando el impacto de los enmascaramientos lógico, eléctrico y combinado lógico-eléctrico. Estas métricas proporcionan una vía de análisis para cuantificar tanto las regiones más susceptibles a propagar eventos SET como las salidas más susceptibles a recibirlos. Ha sido desarrollado un conjunto de algoritmos de búsqueda de caminos sensibilizables altamente adaptables a múltiples aplicaciones, un sistema lógico especifico y diversas técnicas de simplificación de circuitos. Se ha demostrado que el retardo de un camino dado depende de los vectores de sensibilización aplicados a las puertas que forman parte del mismo, siendo esta variación de retardo comparable a la atribuible a las variaciones paramétricas del proceso.
Based on the challenges arising as a result of technology scaling, this thesis develops and evaluates a complete framework for SET propagation sensitivity. The framework comprises a number of processing tools capable of handling circuits with high complexity in an efficient way. Various SET propagation metrics have been proposed considering the impact of logic, electric and combined logic-electric masking. Such metrics provide a valuable vehicle to grade either in-circuit regions being more susceptible of propagating SETs toward the circuit outputs or circuit outputs more susceptible to produce SET. A quite efficient and customizable true path finding algorithm with a specific logic system has been constructed and its efficacy demonstrated on large benchmark circuits. It has been shown that the delay of a path depends on the sensitization vectors applied to the gates within the path. In some cases, this variation is comparable to the one caused by process parameters variations.
Zurek, Eduardo. "System optimization for micron and sub-micron particle identification using spectroscopy-based techniques." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001635.
Повний текст джерелаAgca, Esra. "Optimization-based Logistics Planning and Performance Measurement for Hospital Evacuation and Emergency Management." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/51551.
Повний текст джерелаPh. D.
Ploé, Patrick. "Surrogate-based optimization of hydrofoil shapes using RANS simulations." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0012/document.
Повний текст джерелаThis thesis presents a practical hydrodynamic optimization framework for hydrofoil shape design. Automated simulation based optimization of hydrofoil is a challenging process. It may involve conflicting optimization objectives, but also impose a trade-off between the cost of numerical simulations and the limited budgets available for ship design. The optimization frameworkis based on sequential sampling and surrogate modeling. Gaussian Process Regression (GPR) is used to build a predictive model based on data issued from fluid simulations of selected hydrofoil geometries. The GPR model is then combined with other criteria into an acquisition function that isevaluated over the design space, to define new querypoints that are added to the data set in order to improve the model. A custom acquisition function is developed, based on GPR variance and cross validation of the data.A hydrofoil geometric modeler is also developed to automatically create the hydrofoil shapes based on the parameters determined by the optimizer. To complete the optimization loop, FINE/Marine, a RANS flow solver, is embedded into the framework to perform the fluid simulations. Optimization capabilities are tested on analytical test cases. The results show that the custom function is more robust than other existing acquisition functions when tested on difficult functions. The entire optimization framework is then tested on 2D hydrofoil sections and 3D hydrofoil optimization cases with free surface. In both cases, the optimization process performs well, resulting in optimized hydrofoil shapes and confirming the results obtained from the analytical test cases. However, the optimum is shown to be sensitive to operating conditions
Cheng, Zhanping. "Value based management of supplier relationships and supply contracts : quantitative modeling, valuation and portfolio optimization based on financial investment theories /." Lohmar : Eul, 2009. http://d-nb.info/997314826/04.
Повний текст джерелаThomas, George L. "Biogeography-Based Optimization of a Variable Camshaft Timing System." Cleveland State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=csu1419775790.
Повний текст джерелаDegenhardt, Richard Kennedy III. "Self-collision avoidance through keyframe interpolation and optimization-based posture prediction." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/1446.
Повний текст джерелаKloß, Sebastian. "Simulation-Optimization of the Management of Sensor-Based Deficit Irrigation Systems." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-188762.
Повний текст джерелаArroyo, Campos Ismael. "Optimization of Display-Wall Aware Applications on Cluster Based Systems." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/405579.
Повний текст джерелаNowadays, information and communication systems that work with a high volume of data require infrastructures that allow an understandable representation of it from the user's point of view. This thesis analyzes the Cluster Display Wall platforms, used to visualized massive amounts of data, and specifically studies the Liquid Galaxy platform, developed by Google. Using the Liquid Galaxy platform, a performance study of representative visualization applications was performed, identifying the most relevant aspects of performance and possible bottlenecks. Specifically, we study in greater depth a representative case of visualization application, Google Earth. The system behavior while running Google Earth was analyzed through different kinds of tests with real users. For this, a new performance metric was defined, based on the visualization ratio, and the usability of the system was assessed through the traditional attributes of effectiveness, efficiency and satisfaction. Additionally, the system performance was analytically modeled and the accuracy of the model was tested by comparing it with actual results.
Actualmente, los sistemas de información y comunicación que trabajan con grandes volúmenes de datos requieren el uso de plataformas que permitan una representación entendible desde el punto de vista del usuario. En esta tesis se analizan las plataformas Cluster Display Wall, usadas para la visualización de datos masivos, y se trabaja en concreto con la plataforma Liquid Galaxy, desarrollada por Google. Mediante la plataforma Liquid Galaxy, se realiza un estudio de rendimiento de aplicaciones de visualización representativas, identificando los aspectos de rendimiento más relevantes y los posibles cuellos de botella. De forma específica, se estudia en mayor profundidad un caso representativo de aplicación de visualización, el Google Earth. El comportamiento del sistema ejecutando Google Earth se analiza mediante diferentes tipos de test con usuarios reales. Para ello se define una nueva métrica de rendimiento, basada en el ratio de visualización, y se valora la usabilidad del sistema mediante los atributos tradicionales de efectividad, eficiencia y satisfacción. Adicionalmente, el rendimiento del sistema se modela analíticamente y se prueba la precisión del modelo comparándolo con resultados reales.
Parsons, Mark Allen. "Network-Based Naval Ship Distributed System Design and Mission Effectiveness using Dynamic Architecture Flow Optimization." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/104198.
Повний текст джерелаDoctor of Philosophy
This dissertation describes the development and application of a warship system architectural framework, Architecture Flow Optimization (AFO), and Dynamic Architecture Flow Optimization (DAFO) to warship Concept and Requirements Exploration (CandRE). The architectural framework decomposes warship systems into physical, logical, and operational architectures representing the spatial, functional, and time-based relationships of systems respectively. This decomposition greatly simplifies the Mission, Power, and Energy System (MPES) design process for use in CandRE. AFO and DAFO are a network-based linear programming optimization methods used to design and analyze MPES at a sufficient level of detail to understand system energy usage, define MPES connections and sizing, model operations, reduce system vulnerability and improve system reliability. AFO incorporates system templates, simple physics and energy-based component models, preliminary arrangements, and simple undamaged/damaged scenarios to minimize the energy flow usage required to satisfy all operational scenario demands and constraints. DAFO applies the same principles and adds a second commodity, data flow representing system operation. DAFO also integrates with a warfighting model, operational model, and capabilities model that quantify tasks and capabilities through system measures of performance. This enables the simulation of operational situations including MPES configuration and operation during CandRE. This dissertation provides an overview of design tools developed to implement this process and methods, including optimization objective attribute metrics for cost, effectiveness and risk.
Lim, Jung Youl. "A distributed multi-level current modeling method for design analysis and optimization of permanent magnet electromechanical actuators." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53990.
Повний текст джерелаWong, Ka In. "Machine-learning-based modeling of biofuel engine systems with applications to optimization and control of engine performance." Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3691886.
Повний текст джерелаMena, Rodrigo. "Risk–based modeling, simulation and optimization for the integration of renewable distributed generation into electric power networks." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2015. http://www.theses.fr/2015ECAP0034/document.
Повний текст джерелаRenewable distributed generation (DG) is expected to continue playing a fundamental role in the development and operation of sustainable, efficient and reliable electric power systems, by virtue of offering a practical alternative to diversify and decentralize the overall power generation, benefiting from cleaner and safer energy sources. The integration of renewable DG in the existing electric powernetworks poses socio–techno–economical challenges, which have attracted substantial research and advancement.In this context, the focus of the present thesis is the design and development of a modeling,simulation and optimization framework for the integration of renewable DG into electric powernetworks. The specific problem considered is that of selecting the technology, size and location of renewable generation units, under technical, operational and economic constraints. Within this problem, key research questions to be addressed are: (i) the representation and treatment of the uncertain physical variables (like the availability of diverse primary renewable energy sources, bulk–power supply, power demands and occurrence of components failures) that dynamically determine the DG–integrated network operation, (ii) the propagation of these uncertainties onto the system operational response and the control of the associated risk and (iii) the intensive computational efforts resulting from the complex combinatorial optimization problem of renewable DG integration.For the evaluation of the system with a given plan of renewable DG, a non–sequential MonteCarlo simulation and optimal power flow (MCS–OPF) computational model has been designed and implemented, that emulates the DG–integrated network operation. Random realizations of operational scenarios are generated by sampling from the different uncertain variables distributions,and for each scenario the system performance is evaluated in terms of economics and reliability of power supply, represented by the global cost (CG) and the energy not supplied (ENS), respectively.To measure and control the risk relative to system performance, two indicators are introduced, the conditional value–at–risk (CVaR) and the CVaR deviation (DCVaR).For the optimal technology selection, size and location of the renewable DG units, two distinct multi–objective optimization (MOO) approaches have been implemented by heuristic optimization(HO) search engines. The first approach is based on the fast non–dominated sorting genetic algorithm(NSGA–II) and aims at the concurrent minimization of the expected values of CG and ENS, thenECG and EENS, respectively, combined with their corresponding CVaR(CG) and CVaR(ENS) values; the second approach carries out a MOO differential evolution (DE) search to minimize simultaneously ECG and its associated deviation DCVaR(CG). Both optimization approaches embed the MCS–OPF computational model to evaluate the performance of each DG–integrated network proposed by the HO search engine. The challenge coming from the large computational efforts required by the proposed simulation and optimization frameworks has been addressed introducing an original technique, which nests hierarchical clustering analysis (HCA) within a DE search engine. Examples of application of the proposed frameworks have been worked out, regarding an adaptation of the IEEE 13 bus distribution test feeder and a realistic setting of the IEEE 30 bussub–transmission and distribution test system. The results show that these frameworks are effectivein finding optimal DG–integrated networks solutions, while controlling risk from two distinctperspectives: directly through the use of CVaR and indirectly by targeting uncertainty in the form ofDCVaR. Moreover, CVaR acts as an enabler of trade–offs between optimal expected performanceand risk, and DCVaR integrates also uncertainty into the analysis, providing a wider spectrum ofinformation for well–supported and confident decision making
Lindhorst, Henning Verfasser], and Achim [Gutachter] [Kienle. "Modeling and simulation of enzyme controlled metabolic networks using optimization based methods / Henning Lindhorst ; Gutachter: Achim Kienle." Magdeburg : Universitätsbibliothek Otto-von-Guericke-Universität, 2020. http://d-nb.info/1220036501/34.
Повний текст джерелаLindhorst, Henning [Verfasser], and Achim [Gutachter] Kienle. "Modeling and simulation of enzyme controlled metabolic networks using optimization based methods / Henning Lindhorst ; Gutachter: Achim Kienle." Magdeburg : Universitätsbibliothek Otto-von-Guericke-Universität, 2020. http://d-nb.info/1220036501/34.
Повний текст джерелаDai, Lei. "An Open Platform of Parameterized Shape Optimization based-on CAD/CAE Integration Technique." Reims, 2006. http://theses.univ-reims.fr/exl-doc/GED00000752.pdf.
Повний текст джерелаEltoukhy, Moataz. "Implementation and Validation of a Detailed 3D Inverse Dynamics Lower Extremity Model for Gait Analysis Applications Based on Optimization Technique." Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/558.
Повний текст джерелаNejadpak, Arash. "Development of Physics-based Models and Design Optimization of Power Electronic Conversion Systems." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/824.
Повний текст джерелаRusticali, Valeria. "Numerical investigations on slope stability problems through mathematical optimization-based Finite Element approach." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/22124/.
Повний текст джерелаWilley, Landon Clark. "A Systems-Level Approach to the Design, Evaluation, and Optimization of Electrified Transportation Networks Using Agent-Based Modeling." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8532.
Повний текст джерелаHertz, Erik M. "Thermal and EMI Modeling and Analysis of a Boost PFC Circuit Designed Using a Genetic-based Optimization Algorithm." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34234.
Повний текст джерелаMaster of Science
Sen, Padmanava. "Estimation and optimization of layout parasitics for silicon-based millimeter-wave integrated circuits." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/26585.
Повний текст джерелаCommittee Chair: Dr. Joy Laskar; Committee Member: Dr. Chang- Ho Lee; Committee Member: Dr. Federico Bonetto; Committee Member: Dr. John D. Cressler; Committee Member: Dr. John Papapolymerou; Committee Member: Dr. Linda S. Milor. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Hendrickson, Eric B. "Morphologically simplified conductance based neuron models: principles of construction and use in parameter optimization." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33905.
Повний текст джерелаYlimäki, M. (Markus). "Methods for image-based 3-D modeling using color and depth cameras." Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526217352.
Повний текст джерелаTiivistelmä Tässä työssä käsitellään näkymän tai esineen kolmiulotteista mallintamista ja tulosten laadun arviointia. Työ on jaettu neljään osaan. Ensiksi keskitytään pelkästään valokuvia hyödyntävään mallinnukseen ja sitten esitellään menetelmä syvyyskamerapohjaiseen mallinnukseen. Kolmas osa kuvaa menetelmiä verkkomallien luomiseen pistepilvestä ja lopuksi esitellään menetelmä mallien laadun arviointiin. Ensimmäisessä osassa esitellään usean kuvan stereoon perustuva mallinnusmenetelmä, joka saa syötteenä joukon valokuvia ja tuottaa kuvissa näkyvästä kohteesta pistepilvimallin. Menetelmä perustuu vastinpisteiden laajennukseen, jossa kuvien välisiä pistevastaavuuksia laajennetaan iteratiivisesti suuremmiksi vastinalueiksi hakemalla uusia vastinpistepareja jo löydettyjen läheisyydestä. Laajennus käyttää paras ensin -menetelmää, jossa luotettavin pistevastaavuus laajennetaan aina ensin. Menetelmä tuottaa vertailukelpoisia tuloksia johtaviin menetelmiin verrattuna, mutta merkittävästi nopeammin. Toisessa osassa esitellään menetelmä, joka yhdistää joukon syvyyskameralla kaapattuja syvyyskarttoja yhdeksi pistepilveksi. Alueilla, jotka sisältävät syvyysmittauksia useasta syvyyskartasta, päällekkäiset mittaukset yhdistetään painottamalla luotettavammalta vaikuttavaa mittausta. Menetelmä on tarkempi kuin edeltäjänsä ja toimii paremmin kohinaisemmalla datalla. Lisäksi tässä osassa esitellään menetelmä syvyyskameran kalibrointiin. Menetelmä kehittää jo olemassa olevaa kalibrointityökalua, joka alun perin kehitettiin ensimmäisen sukupolven Microsoft Kinect laitteelle. Väitöskirjan kolmas osa käsittelee pintamallin luomista pistepilvestä. Työ esittelee kaksi hyvin tunnettua menetelmää ja vertailee niiden kykyä luoda harvoja, mutta edelleen tarkkoja malleja. Lopuksi esitellään uudenlainen menetelmä mallinnusmenetelmien arviointiin. Tarkkuuden ja kattavuuden lisäksi, jotka ovat yleisimmät arvioinnissa käytetyt metriikat, menetelmä ottaa huomioon myös mallin pistetiheyden. Metriikan avulla on mahdollista arvioida kompromissia mallin tarkkuuden ja tiheyden välillä
Davidson, James. "A Distributed Surrogate Methodology for Inverse Most Probable Point Searches in Reliability Based Design Optimization." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1440695264.
Повний текст джерелаRechkemmer, Sabrina [Verfasser]. "Lifetime modeling and model-based lifetime optimization of Li-ion batteries for use in electric two-wheelers / Sabrina Rechkemmer." Düren : Shaker, 2020. http://d-nb.info/1213627621/34.
Повний текст джерелаWerner, Quentin. "Model-based optimization of electrical system in the early development stage of hybrid drivetrains." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0109.
Повний текст джерелаThis work analyses the challenges faced by the electric components for traction purpose in hybrid drivetrains. It investigates the components and their interactions as an independent entity in order to refine the scope of investigation and to find the best combinations of components instead of the best components combinations. Hybrid vehicle is currently a topic of high interest because it stands for a suitable short-term solution towards zero emission vehicle. Despite its advantages, it is a challenging topic because the components need to be integrated in a conventional drivetrain architecture. Therefore, the focus of this work is set on the determination of the right methods to investigate only the electric components for traction purpose. The aim and the contributions of this work lies thereby in the resolution of the following statement: Determine the sufficient level of details in modeling electric components at the system level and develop models and tools to perform dynamic simulations of these components and their interactions in a global system analysis to identify ideal designs of various drivetrain electric components during the design process. To address these challenges, this work is divided in four main parts within six chapters. First the current status of the hybrid vehicle, the electric components and the associated optimization methods and simulation are presented (first chapter). Then for each component, the right modeling approach is defined in order to investigate the electrical, mechanical and thermal behavior of the components as well as methods to evaluate their integration in the drivetrain (second to fourth chapter). After this, a suitable method is defined to evaluate the global system and to investigate the interactions between the components based on the review of relevant previous works (chapter five). Finally, the last chapter presents the optimization approach considered in this work and the results by analyzing different system and cases (chapter six). Thanks to the analysis of the current status, previous works and the development of the simulations tools, this work investigates the relationships between the voltage, the current and the power in different cases. The results enable, under the considered assumptions of the work, to determine the influence of these parameters on the components and of the industrial environment on the optimization results. Considering the current legislative frame, all the results converge toward the same observation referred to the reference systems: a reduction of the voltage and an increase of the current leads to an improvement of the integration and the performance of the system. These observations are linked with the considered architecture, driving cycle and development environment but the developed methods and approaches have set the basis to extend the knowledge for the optimization of the electric system for traction purpose. Beside the main optimization, special cases are investigated to show the influence of additional parameters (increase of the power, 48V-system, machine technology, boost-converter…) In order to conclude, this work have set the basis for further investigations about the electric components for traction purpose in more electrified vehicle. Due to the constantly changing environment, the new technologies and the various legislative frame, this topic remains of high interest and the following challenges still need to be deeper investigated: * Application of the methods for other drivetrain architecture (series hybrid, power-split hybrid, fuel-cell vehicle, full electric vehicle), * Investigation of new technologies such as silicon-carbide for the power electronics, lithium–sulfur battery or switch reluctance machine, * Investigation of other driving cycle, legislative frame, * Integration of additional power electronics structure, * Further validation of the modeling approaches with additional components