Dissertationen zum Thema „Global function optimization“
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Gutmann, H. M. „Radial basis function methods for global optimization“. Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599804.
Der volle Inhalt der QuelleBastani, Spencer, und Olov Andersson. „Stochastic Optimization in Dynamic Environments : with applications in e-commerce“. Thesis, Linköping University, Department of Mathematics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8509.
Der volle Inhalt der QuelleIn this thesis we address the problem of how to construct an optimal algorithm for displaying banners (i.e advertisements shown on web sites). The optimization is based on the revenue each banner generates, with the aim of selecting those banners which maximize future total revenue. Banner optimality is of major importance in the e-commerce industry, in particular on web sites with heavy traffic. The 'micropayments' from showing banners add up to substantial profits due to the large volumes involved. We provide a broad, up-to-date and primarily theoretical treatment of this global optimization problem. Through a synthesis of mathematical modeling, statistical methodology and computer science we construct a stochastic 'planning algorithm'. The superiority of our algorithm is based on empirical analysis conducted by us on real internet-data at TradeDoubler AB, as well as test-results on a selection of stylized data-sets. The algorithm is flexible and adapts well to new environments.
Hatton, Marc. „Requirements specification for the optimisation function of an electric utility's energy flow simulator“. Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96956.
Der volle Inhalt der QuelleENGLISH ABSTRACT: Efficient and reliable energy generation capability is vital to any country's economic growth. Many strategic, tactical and operational decisions take place along the energy supply chain. Shortcomings in South Africa's electricity production industry have led to the development of an energy ow simulator. The energy ow simulator is claimed to incorporate all significant factors involved in the energy ow process from primary energy to end-use consumption. The energy ow simulator thus provides a decision support system for electric utility planners. The original aim of this study was to develop a global optimisation model and integrate it into the existing energy ow simulator. After gaining an understanding of the architecture of the energy ow simulator and scrutinising a large number of variables, it was concluded that global optimisation was infeasible. The energy ow simulator is made up of four modules and is operated on a module-by-module basis, with inputs and outputs owing between modules. One of the modules, namely the primary energy module, lends itself well to optimisation. The primary energy module simulates coal stockpile levels through Monte Carlo simulation. Classic inventory management policies were adapted to fit the structure of the primary energy module, which is treated as a black box. The coal stockpile management policies that are introduced provide a prescriptive means to deal with the stochastic nature of the coal stockpiles. As the planning horizon continuously changes and the entire energy ow simulator has to be re-run, an efficient algorithm is required to optimise stockpile management policies. Optimisation is achieved through the rapidly converging cross-entropy method. By integrating the simulation and optimisation model, a prescriptive capability is added to the primary energy module. Furthermore, this study shows that coal stockpile management policies can be improved. An integrated solution is developed by nesting the primary energy module within the optimisation model. Scalability is incorporated into the optimisation model through a coding approach that automatically adjusts to an everchanging planning horizon as well as the commission and decommission of power stations. As this study is the first of several research projects to come, it paves the way for future research on the energy ow simulator by proposing future areas of investigation.
AFRIKAANSE OPSOMMING: Effektiewe en betroubare energie-opwekkingsvermoë is van kardinale belang in enige land se ekonomiese groei. Baie strategiese, taktiese en operasionele besluite word deurgaans in die energie-verskaffingsketting geneem. Tekortkominge in Suid-Afrika se elektrisiteitsopwekkingsindustrie het tot die ontwikkeling van 'n energie-vloei-simuleerder gelei. Die energie-vloei-simuleerder vervat na bewering al die belangrike faktore wat op die energie-vloei-proses betrekking het van primêre energieverbruik tot eindgebruik. Die energie-vloei-simuleerder verskaf dus 'n ondersteuningstelsel aan elektrisiteitsdiensbeplanners vir die neem van besluite. Die oorspronklike doel van hierdie studie was om 'n globale optimeringsmodel te ontwikkel en te integreer in die bestaande energie-vloeisimuleerder. Na 'n begrip aangaande die argitektuur van die energievloei- simuleerder gevorm is en 'n groot aantal veranderlikes ondersoek is, is die slotsom bereik dat globale optimering nie lewensvatbaar is nie. Die energie-vloei-simuleerder bestaan uit vier eenhede en werk op 'n eenheid-tot-eenheid basis met insette en uitsette wat tussen eenhede vloei. Een van die eenhede, naamlik die primêre energiemodel, leen dit goed tot optimering. Die primêre energiemodel boots steenkoolreserwevlakke deur Monte Carlo-simulering na. Tradisionele voorraadbestuursbeleide is aangepas om die primêre energiemodel se struktuur wat as 'n swartboks hanteer word, te pas. Die steenkoolreserwebestuursbeleide wat ingestel is, verskaf 'n voorgeskrewe middel om met die stogastiese aard van die steenkoolreserwes te werk. Aangesien die beplanningshorison deurgaans verander en die hele energie-vloei-simulering weer met die energie-vloei-simuleerder uitgevoer moet word, word 'n effektiewe algoritme benodig om die re-serwebestuursbeleide te optimeer. Optimering word bereik deur die vinnige konvergerende kruis-entropie-metode. 'n Geïntegreerde oplossing is ontwikkel deur die primêre energiemodel en die optimering funksie saam te voeg. Skalering word ingesluit in die optimeringsmodel deur 'n koderingsbenadering wat outomaties aanpas tot 'n altyd-veranderende beplanningshorison asook die ingebruikneem en uitgebruikstel van kragstasies. Aangesien hierdie studie die eerste van verskeie navorsingsprojekte is, baan dit die weg vir toekomstige navorsing oor die energie-vloeisimuleerder deur ondersoekareas vir die toekoms voor te stel.
Al-Mharmah, Hisham. „Global optimization of stochastic functions“. Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/25665.
Der volle Inhalt der QuelleSharikov, Evgenii. „Conditions for global minimum through abstract convexity“. Thesis, University of Ballarat, 2008. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/45930.
Der volle Inhalt der QuelleDoctor of Philosophy
Andramonov, Mikhail. „Global minimization of some classes of generalized convex functions“. Thesis, Federation University Australia, 2001. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164850.
Der volle Inhalt der QuelleFowkes, Jaroslav Mrazek. „Bayesian numerical analysis : global optimization and other applications“. Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:ab268fe7-f757-459e-b1fe-a4a9083c1cba.
Der volle Inhalt der QuelleSelassie, Abebe Geletu W. „A coarse solution of generalized semi-infinite optimization problems via robust analysis of marginal functions and global optimization“. [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974862304.
Der volle Inhalt der QuelleSultanova, Nargiz. „A class of Increasing Positively Homogeneous functions for which global optimization problem is NP-hard“. Thesis, University of Ballarat, 2009. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/44036.
Der volle Inhalt der QuelleMaster of Mathematical Sciences (Research)
Sultanova, Nargiz. „A class of Increasing Positively Homogeneous functions for which global optimization problem is NP-hard“. University of Ballarat, 2009. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/16160.
Der volle Inhalt der QuelleMaster of Mathematical Sciences (Research)
Cheon, Myun-Seok. „Global Optimization of Monotonic Programs: Applications in Polynomial and Stochastic Programming“. Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04152005-130317/unrestricted/Cheon%5FMyunSeok%5F200505%5Fphd.pdf.
Der volle Inhalt der QuelleBarnes, Earl, Committee Member ; Shapiro, Alex, Committee Member ; Realff, Matthew, Committee Member ; Al-Khayyal, Faiz, Committee Chair ; Ahmed, Shabbir, Committee Co-Chair. Includes bibliographical references.
Olofsson, Karl-Johan. „Black-box optimization of simulated light extraction efficiency from quantum dots in pyramidal gallium nitride structures“. Thesis, Linköpings universitet, Matematiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-162235.
Der volle Inhalt der QuelleNiu, Yi Shuai. „Programmation DC et DCA en optimisation combinatoire et optimisation polynomiale via les techniques de SDP : codes et simulations numériques“. Phd thesis, INSA de Rouen, 2010. http://tel.archives-ouvertes.fr/tel-00557911.
Der volle Inhalt der QuelleStöcker, Martin. „Globale Optimierungsverfahren, garantiert globale Lösungen und energieeffiziente Fahrzeuggetriebe“. Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-166805.
Der volle Inhalt der QuelleRondina, Gustavo Garcia. „Novas ideias para o Método de Basin-Hopping Monte Carlo aplicado à otimização global de Clusters e Nanopartículas“. Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-17012014-161604/.
Der volle Inhalt der QuelleIn this work it is introduced and evaluated a set of new ideas to increase the efficiency of the Basin-Hopping Monte Carlo (BHMC) method applied to the global optimization of clusters and nanoparticles, which resulted in the revised BHMC method. Within this method, care was taken to keep the main features of the standard BHMC method, which are the transformation of the potential energy surface into a set of basins of attraction, and the use of Monte Carlo sampling employing the Metropolis criterion. The ideas behind the revised BHMC method include a large set of local and non-local operators built specifically for clusters and nanoparticles which allow a greater mobility over the potential energy surface along of the search for the global minimum, two strategies for selecting the operators, and a structural filter operator to remove unphysical solutions. The efficiency of the presented method was evaluated by applying it to a large number of clusters and nanoparticles of various sizes, comprising systems described both by empirical potentials and by first-principles within the formalism of density functional theory (DFT). The systems that were investigated were Lennard-Jones and Sutton-Chen clusters with up to 148 atoms, a set of Lennard-Jones nanoparticles with sizes from 200 to 1500 atoms, binary Lennard-Jones clusters with up to 100 atoms, binary transition metal clusters (AgPd)55 described by the Sutton-Chen potential, pure aluminum clusters with up to 30 atoms described by DFT, and aluminum clusters with up to 15 atoms doped with a copper atom, also described by DFT. Through the unbiased global optimization of all those particles, the revised BHMC method was able to successfully reproduce the most recent putative global minima available in the literature obtained by several different global optimization techniques, and moreover, it was able to identify previously unkown global minima. Furthermore, in comparison with the standard BHMC method, the RBHMC method proved to be more efficient for many of the systems that were investigated. The ideas comprised within the presented methodology characterize a valuable tool for aiding theoretical investigations leading to a better understanding of the atomic structure of clusters and nanoparticles.
Clausner, André. „Anwendung von Line-Search-Strategien zur Formoptimierung und Parameteridentifikation“. Master's thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-114858.
Der volle Inhalt der QuelleMokukcu, Mert. „Optimisation énergétique d'un véhicule hybride“. Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC066/document.
Der volle Inhalt der QuelleTechnology advancements increase the complexity of energy systems which bring additional varieties of sources and possible architectures to choose. If the economic and ecological context is also included, the automobile industry is in_uenced to align their production to hybrid or battery electric vehicles that have sophisticated energy management system. Thus, researchers and designers have oriented their studies for system design, optimisation and energy management that take into consideration the constructor tendencies : i) increasing vehicle performances, ii) having less polluting vehicles by reducing fuel consumption and iii) decreasing the time needed for design and validation process. Against these problematics, an approach that assists the system designer to fully characterize the energy management system of a HEV is proposed. This characterization consists : i) choosing powertrain architecture, ii) component (units) sizing and iii) energy management controller. In order to accomplish these tasks, a functional energetic modelling method is proposed. Proposed functional modelling level has a level of abstraction _just necessary_ which permits to have energetic analysis for a series of use case. This method relies on local control loops, a global controller and basic equations and it allows to have a modular optimisation for any architecture changes. The second-stage in the validation is completed by adapting the functional model in order to obtain the high-level controller for the multi-physical level with two offered steps : i) adjustment the functional elements' parameters and ii) interconnection the functional and multi-physical models. After the illustration of the demonstrator of a HEV, three strategies for energy management is proposed : i) based on rules, ii) based on PFC with power sharing function and iii) based on PFC with booster function. The proposed energy management strategies then compared by performance indicators (fuel consumption, number of on/off cycles of engine powertrain and corrected fuel consumption with variation of state of charge of electrical storage) with defined use cases
Ben, Gharbia Ibtihel. „Résolution de problèmes de complémentarité. : Application à un écoulement diphasique dans un milieu poreux“. Phd thesis, Université Paris Dauphine - Paris IX, 2012. http://tel.archives-ouvertes.fr/tel-00776617.
Der volle Inhalt der QuelleCuko, Andi. „Modelling nano-oxide materials with technological and environmental relevance : silica, titania and titanosilicates Predicting size-dependent emergence of crystallinity in nanomaterials: titania nanoclusters versus nanocrystals Global optimisation of hydroxylated silica clusters: A cascade Monte Carlo Basin Hopping approach“. Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS368.
Der volle Inhalt der QuelleIn this thesis we focus on modelling of titania, silica and titanosilicate based nano materials because of their technological importance as they are employed in heterogeneous (photo-)catalysis, in electronics gas-sensing etc. to cite a few. For such systems, we firstly performed global optimization studies in gas-phase and water containing environments in order to identify the structures of nanoparticles. Secondly, we studied structural, energetic and electronic size-dependent properties of such nanoparticles as well as their reducibility, extrapolating up to the bulk macroscopic level in some cases. For such characterization we use accurate quantum mechanical methods based on the Density Functional Theory (DFT). Our results point to a series of important predictions such us: i) the crystallinity of titania nanoparticles, which is the key property for the photoactivity, is predicted to emerge when nanoparticles become larger than 2.0-2.5 nm; ii) the mixing of titania and silica to form titanosilicates is found be thermodynamically favorable at the nanoscale, contrary to the bulk; iii) the hydration of silica and titania nanoclusters, which plays an important role in the aggregation and nucleation process during the synthesis of larger nanoparticles, is controlled by environmental factors such as temperature and water vapor pressure as predicted from calculated phase diagrams
Kajee-Bagdadi, Zaakirah. „Differential evolution algorithms for constrained global optimization“. Thesis, 2008. http://hdl.handle.net/10539/4733.
Der volle Inhalt der QuelleHošala, Michal. „Riešenie problému globálnej optimalizácie využitím GPU“. Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-336205.
Der volle Inhalt der QuelleSchomburg, Helen. „New Algorithms for Local and Global Fiber Tractography in Diffusion-Weighted Magnetic Resonance Imaging“. Doctoral thesis, 2017. http://hdl.handle.net/11858/00-1735-0000-0023-3F8B-F.
Der volle Inhalt der QuelleYi-Yin, Chiu. „Modified Particle Swarm Optimization for Solving the Global Optimization of Continuous Multimodal Functions“. 2004. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0009-0112200611323569.
Der volle Inhalt der QuelleYi-Yin, Chiu, und 邱怡瑛. „Modified Particle Swarm Optimization for Solving the Global Optimization of Continuous Multimodal Functions“. Thesis, 2004. http://ndltd.ncl.edu.tw/handle/42490178787854981603.
Der volle Inhalt der Quelle元智大學
工業工程與管理學系
92
The development of the Particle Swarm Optimization (PSO) has been almost ten years since 1995. From that time on, a variety of modifications of the original PSO has been proposed by many PSO researchers. The evolutionary concept of PSO, simple in concept, easy to implement and computational efficient, is partly the motivation of this thesis. The performance of the original PSO on the solution quality and convergence speed becomes much aggravated while optimizing multimodal functions with higher dimension. This is the main objective of this research such that we would like to develop a modified PSO suitable for solving large-scale multimodal optimization problems. In this study, design of experiments (DOE) has been conducted to investigate the influences of each parameter in PSO. Based the computation results in the DOE stage, a modified PSO, termed Decreasing Weight Particle Swarm Optimization (DW-PSO), has been addressed. The success rate and number of function evaluation are considered performance measures. The experimental results show that the DW-PSO shows great promise in solving multimodal functions. The computational comparisons with PSO variants further reveal that DW-PSO has significant advantages, especially when it is performed to solve high dimension problems.
Tian, Jing. „Global optimality conditions and optimization methods for polynomial programming problems and their applications“. Thesis, 2014. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/94787.
Der volle Inhalt der QuelleDoctor of Philosophy
Odat, Enas M. „Sequential Optimization of Global Sequence Alignments Relative to Different Cost Functions“. Thesis, 2011. http://hdl.handle.net/10754/271672.
Der volle Inhalt der QuelleGeletu, W. Selassie Abebe Weber Gerhard-Wilhelm. „A coarse solution of generalized semi-infinite optimization problems via robust analysis of marginal functions and global optimization /“. 2004. http://www.gbv.de/dms/ilmenau/toc/476348986.PDF.
Der volle Inhalt der QuelleNeilson, Daniel. „A Study of Match Cost Functions and Colour Use In Global Stereopsis“. Phd thesis, 2009. http://hdl.handle.net/10048/449.
Der volle Inhalt der QuelleGeletu, Abebe [Verfasser]. „A coarse solution of generalized semi-infinite optimization problems via robust analysis of marginal functions and global optimization / vorgelegt von Abebe Geletu W. Selassie“. 2004. http://d-nb.info/974862304/34.
Der volle Inhalt der QuelleStöcker, Martin. „Globale Optimierungsverfahren, garantiert globale Lösungen und energieeffiziente Fahrzeuggetriebe“. Doctoral thesis, 2014. https://monarch.qucosa.de/id/qucosa%3A20243.
Der volle Inhalt der QuelleClausner, André. „Anwendung von Line-Search-Strategien zur Formoptimierung und Parameteridentifikation“. Master's thesis, 2007. https://monarch.qucosa.de/id/qucosa%3A19910.
Der volle Inhalt der QuelleNkwanyana, Thamsanqa Bongani. „Multi-input multi-output proportional integral derivative controller tuning based on improved particle swarm optimization“. Diss., 2021. http://hdl.handle.net/10500/27692.
Der volle Inhalt der QuelleElectrical and Mining Engineering
M. Tech. (Electrical Engineering)