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Dissertations / Theses on the topic 'Stationary points'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Faber, Tristan Friedrich. "Critical points in two-dimensional stationary homogeneous isotropic turbulence." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/5527.

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Basic properties of critical points in two dimensions are reviewed and related to the velocity and acceleration field of two-dimensional turbulence. A direct numerical simulation (DNS) of two-dimensional homogeneous isotropic turbulence with an inverse energy cascade and a k−5/3 power law is used to study critical points of these fields. The velocity stagnation point based pair separation model of Goto and Vassilicos (S Goto and J C Vassilicos, 2004, New J.Phys., 6, p.65) is revisited and placed on a sound mathematical foundation. The DNS is used to study the time-asymmetry observed between fo

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2

Undin, Torgny. "Development and improvement of methods for characterization of HPLC stationary phases." Licentiate thesis, Uppsala universitet, Analytisk kemi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-166978.

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High Performance Liquid Chromatography (HPLC) is a widely used tech-nique both for detecting and purifying substances in academy and in the industry. In order to facilitate the use of, and knowledge in HPLC, character-ization of stationary phases is of utmost importance. Tailor made characteri-zation methods and workflows are steadily increasing the speed and accura-cy in which new separation systems and methods are developed. In the field fundamental separation science and of preparative chromatography there is always the need for faster and more accurate methods of adsorption isotherm determ

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3

Ponomarenko, Andrej. "Lösungsmethoden für Variationsungleichungen." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2003. http://dx.doi.org/10.18452/14841.

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Zusammenfassung Diese Arbeit ist ein Versuch, verschiedene klassische und neuere Methodender glatten bzw. nichtglatten Optimierung zu verallgemeinern und in ihrem Zusammenhang darzustellen. Als Hauptinstrument erweist sich dabei die sogenannte verallgemeinerte Kojima-Funktion. Neben reichlichen Beispielen setzen wir einen besonderen Akzent auf die Betrachtung von Variationsungleichungen, Komplementaritaetsaufgaben und der Standartaufgabeder mathematischen Programmierung. Unter natuerlichen Voraussetzungen an diese Probleme kann man u.a. Barriere-, Straf- und SQP-Typ-Methoden, die auf Newto

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4

Bouafia, Philippe. "Representation operators of metric and Euclidian charges." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01015943.

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We study multiple valued functions with values in a Hilbert space. We introduce a possibledefinition of Sobolev spaces and the rightful notion of p energy. We prove the existence of pminimizers. Then we consider two-valued real functions of two variables which are stationarywith respect to both domain and range transformations. We prove their local Lipschitzcontinuity and use it to establish strong convergence in W1,2 to their unique blow-up at anypoint. We claim that the branch set of any such function consists of finitely many real analyticcurves meeting at nod points with equal angles. We a

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5

Heveling, Matthias. "Bijective point maps, point-stationarity and characterization of Palm measures." Karlsruhe : Univ.-Verl. Karlsruhe, 2005. http://deposit.d-nb.de/cgi-bin/dokserv?idn=979772591.

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6

Sormani, Martina [Verfasser], and Claudia [Akademischer Betreuer] Redenbach. "Directional Analysis of Stationary Point Processes / Martina Sormani ; Betreuer: Claudia Redenbach." Kaiserslautern : Technische Universität Kaiserslautern, 2019. http://d-nb.info/119492977X/34.

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7

David, Stella Veronica. "Central limit theorems for empirical product densities of stationary point processes." kostenfrei, 2008. http://d-nb.info/994494777/34.

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8

Heveling, Matthias [Verfasser]. "Bijective point maps, point-stationarity and characterization of Palm measures / von Matthias Heveling." Karlsruhe : Univ.-Verl. Karlsruhe, 2006. http://d-nb.info/979772591/34.

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9

Browning, Drew. "Modeling non-point source pollution in surface water under non-stationary climates and land uses." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408983669.

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10

El, Ktaibi Farid. "Asymptotics for the Sequential Empirical Process and Testing for Distributional Change for Stationary Linear Models." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/31916.

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Detecting a change in the structure of a time series is a classical statistical problem. Here we consider a short memory causal linear process $X_i=\sum_{j=0}^\infty a_j\xi_{i-j}$, $i=1,\cdots,n$, where the innovations $\xi_i$ are independent and identically distributed and the coefficients $a_j$ are summable. The goal is to detect the existence of an unobserved time at which there is a change in the marginal distribution of the $X_i$'s. Our model allows us to simultaneously detect changes in the coefficients and changes in location and/or scale of the innovations. Under very simple moment and

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11

Buterakos, Lewis Allen. "The Exit Time Distribution for Small Random Perturbations of Dynamical Systems with a Repulsive Type Stationary Point." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/28703.

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We consider a stochastic differential equation on a domain D in n-dimensional real space, where the associated dynamical system is linear, and D contains a repulsive type stationary point at the origin O. We obtain an exit law for the first exit time of the solution process from a ball of arbitrary radius centered at the origin, which involves additive scaling as in Day (1995). The form of the scaling constant is worked out and shown to depend on the structure of the Jordan form of the linear drift. We then obtain an extension of this exit law to the first exit time of the solution process

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12

Gado, Djibo Abdouramane. "Exploration of Non-Linear and Non-Stationary Approaches to Statistical Seasonal Forecasting in the Sahel." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35130.

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Water resources management in the Sahel region of West Africa is extremely difﬁcult because of high inter-annual rainfall variability as well as a general reduction of water availability in the region. Observed changes in streamﬂow directly disturb key socioeconomic activities such as the agriculture sector, which constitutes one of the main survival pillars of the West African population. Seasonal rainfall forecasting is considered as one possible way to increase resilience to climate variability by providing information in advance about the amount of rainfall expected in each upcoming rainy

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13

PORRU, MARIO. "Management and control of energy storage systems for stationary and automotive applications." Doctoral thesis, Università degli Studi di Cagliari, 2015. http://hdl.handle.net/11584/266607.

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This PhD dissertation has presented a number of scenarios in which Energy Storage Systems (ESSs) can be usefully employed for increasing energy system performances. Particularly, after introducing the State-of-the-Art of ESS technologies (Chapter 1), reference has been made to some stationary and automotive applications. Stationary applications have regarded Renewable Energy Sources (RESs) exploitation issues and EV integration within micro-grids (Chapter 2). It has been shown that ESSs are particularly useful in compensating for RES forecasting errors, whereas they are much less effecti

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14

Almhmadi, Raed Ali M. "Optical True Time Delay Device for mm-Wave Antenna Array Beamforming." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1566073503380698.

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15

O’Donnell, Andrew Nickerson. "On the Electromagnetic Scattering from Small Grooves in a Conical Surface." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1297889460.

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16

Smith, Michael. "Non-parametric workspace modelling for mobile robots using push broom lasers." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:50224eb9-73e8-4c8a-b8c5-18360d11e21b.

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This thesis is about the intelligent compression of large 3D point cloud datasets. The non-parametric method that we describe simultaneously generates a continuous representation of the workspace surfaces from discrete laser samples and decimates the dataset, retaining only locally salient samples. Our framework attains decimation factors in excess of two orders of magnitude without significant degradation in fidelity. The work presented here has a specific focus on gathering and processing laser measurements taken from a moving platform in outdoor workspaces. We introduce a somewhat unusual p

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17

Nowik, Witold. "Mise au point d’une démarche analytique de caractérisation de mélanges naturels complexes à l’aide de méthodes chromatographiques sélectives et complémentaires : application à l’analyse des colorants anthraquinoniques présents sur les objets du patrimoine." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112196.

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Le travail présenté constitue une contribution méthodologique dans la séparation des anthraquinoïdes par chromatographie en phase liquide à haute performance à polarité inversée de phases. Cette amélioration a pour but ultime une meilleure détectabilité et caractérisation des composés constituant les colorants anthraquinoniques présents dans les objets du patrimoine culturel.Une série de 40 composés témoins, représentant un large éventail des structures possibles d’anthraquinoïdes a été utilisée pour la modélisation du comportement chromatographique de cette famille de composés.La première par

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18

Fiscella, A. "VARIATIONAL PROBLEMS INVOLVING NON-LOCAL ELLIPTIC OPERATORS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/245334.

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My thesis deals with nonlinear elliptic problems involving a non-local integrodifferential operator of fractional type. Our main results concern the existence of weak solutions for these problems and they are obtained using variational and topological methods.

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19

Castellà, Sánchez Mercè. "Statistical modelling and analysis of summer very hot events in mainland Spain." Doctoral thesis, Universitat Rovira i Virgili, 2014. http://hdl.handle.net/10803/145723.

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Extreme temperature events are of particular importance due to their severe impact on the environment, economy and the society. Focused on the uppermost percentiles of summer daily maximum (Tx) and minimum (Tn) temperatures,in this thesis a modelling and analysis of summer very hot days (VHD) and nights (VHN) over mainland Spain has been carried out applying the methodology of Point Process Approach based on Extreme Value Theory. It has been investigated whether large-scale variables of Sea Level Pressure, Sea Surface Temperature and soil moisture are associated to the occurrence and intensity

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20

Davis, Paige N. "Localised structures in some non-standard, singularly perturbed partial differential equations." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/201835/1/Paige_Davis_Thesis.pdf.

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This thesis addresses the existence and stability of localised solutions in some nonstandard systems of partial differential equations. In particular, it locates the linearised spectrum of a Keller-Segel model for bacterial chemotaxis with logarithmic chemosensitivity, establishes the existence of travelling wave solutions to the Gatenby-Gawlinski model for tumour invasion with the acid-mediation hypothesis using geometric singular perturbation theory, and formulates the Evans function for a trivial defect solution in a general reaction diffusion equation with an added heterogeneous defect. Ex

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21

Snežana, Gordić. "Generalized stochastic processes with applications in equation solving." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=110199&source=NDLTD&language=en.

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In this dissertation stochastic processes are regarded in the framework of Colombeau-type algebras of generalized functions. Such processes are called Colombeau stochastic processes.The notion of point values of Colombeau stochastic processes in compactly supported generalized points is established. The Colombeau algebra of compactly supported generalized constants is endowed with the topology generated by sharp open balls. The measurability of the corresponding random variables with values in the Colombeau algebra of compactly supported generalized constants is shown.The generalized correlati

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22

Salman, Youssef. "Testing a class of time-varying coefficients CHARN models with application to change-point study." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0170.

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Dans cette thèse, nous étudions un test du rapport de vraisemblance pour détecter les ruptures faibles dans la moyenne conditionnelle d'une classe de modèles CHARN à coefficients dépendants du temps. Nous établissons la structure de normalité asymptotique locale (LAN) de la famille de vraisemblances étudiées. Nous montrons l'optimalité asymptotique du test et donnons une expression explicite de sa puissance locale en fonction des potentiels points de rupture et des amplitudes des ruptures. Nous décrivons des stratégies de détection des ruptures et d'estimation de leurs localisations. Les estim

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23

Miquelluti, David José. "Regiões de confiança para a localização do ponto estacionário em superfícies de resposta, usando o método "bootstrap" Bayesiano." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-17072008-144245/.

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Experimentos nos quais uma ou mais variáveis respostas são influênciadas por diversos fatores quantitativos são bastante comuns nas áreas agrícola, química, biológica, dentre outras. Nesse caso, o problema de pesquisa consiste em se estudar essa relação, sendo de grande utilidade o uso da metodologia de superfícies de resposta (MSR). Nesse contexto, a determinação dos níveis dos fatores que otimizam a resposta consiste inicialmente na obtenção das coordenadas do ponto estacionário do modelo ajustado. No entanto, como o modelo verdadeiro é desconhecido, é interessante obter uma região de confia

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24

Obeid, Ziad. "Mise au point d'algorithmes pour la détection de dégradations de roulements d'actionneurs synchrones à aimants permanents. Application dans le domaine aéronautique sur des ventilateurs embarqués." Phd thesis, Toulouse, INPT, 2012. http://oatao.univ-toulouse.fr/14176/1/obeid_partie_1_sur_2.pdf.

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Ce travail de thèse traite de la détection des défauts mécaniques des roulements à billes par analyse de grandeurs mécaniques et électriques dans des machines synchrones à aimants permanents haute vitesse. Le domaine applicatif de ce travail concerne l'aéronautique. Généralement, pour surveiller l'état des roulements à billes dans un actionneur électrique, des mesures vibratoires sont réalisées. Elles permettent, en exploitant le spectre du signal vibratoire, de mettre facilement en évidence la détérioration du roulement. Cette méthode de surveillance est cependant relativement couteuse en ter

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25

Källberg, David. "Nonparametric Statistical Inference for Entropy-type Functionals." Doctoral thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-79976.

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In this thesis, we study statistical inference for entropy, divergence, and related functionals of one or two probability distributions. Asymptotic properties of particular nonparametric estimators of such functionals are investigated. We consider estimation from both independent and dependent observations. The thesis consists of an introductory survey of the subject and some related theory and four papers (A-D). In Paper A, we consider a general class of entropy-type functionals which includes, for example, integer order Rényi entropy and certain Bregman divergences. We propose U-statistic es

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26

Abramowicz, Konrad. "Numerical analysis for random processes and fields and related design problems." Doctoral thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46156.

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In this thesis, we study numerical analysis for random processes and fields. We investigate the behavior of the approximation accuracy for specific linear methods based on a finite number of observations. Furthermore, we propose techniques for optimizing performance of the methods for particular classes of random functions. The thesis consists of an introductory survey of the subject and related theory and four papers (A-D). In paper A, we study a Hermite spline approximation of quadratic mean continuous and differentiable random processes with an isolated point singularity. We consider a piec

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27

Sànchez, Pérez Andrés. "Agrégation de prédicteurs pour des séries temporelles, optimalité dans un contexte localement stationnaire." Thesis, Paris, ENST, 2015. http://www.theses.fr/2015ENST0051/document.

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Cette thèse regroupe nos résultats sur la prédiction de séries temporelles dépendantes. Le document comporte trois chapitres principaux où nous abordons des problèmes différents. Le premier concerne l’agrégation de prédicteurs de décalages de Bernoulli Causales, en adoptant une approche Bayésienne. Le deuxième traite de l’agrégation de prédicteurs de ce que nous définissions comme processus sous-linéaires. Une attention particulaire est portée aux processus autorégressifs localement stationnaires variables dans le temps, nous examinons un schéma de prédiction adaptative pour eux. Dans le derni

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28

Darwiche, Ahmad. "De nouveaux théorèmes limites sur les extrêmes et les systèmes dynamiques." Thesis, Littoral, 2020. http://www.theses.fr/2020DUNK0572.

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Dans cette thèse, nous établissons quelques théorèmes limites en théorie des valeurs extrêmes et en systèmes dynamiques. La thèse est composée de deux parties. Dans la première partie, nous nous intéressons au comportement du maximum d’une suite qui ne satisfait pas les hypothèses classiques de la théorie des valeurs extrêmes. La suite que nous considérons est générée par une marche aléatoire en milieu aléatoire. Nous établissons un résultat de convergence sur le processus ponctuel des excédents associé à la suite et calculons l’indice extrémal. Des propriétés de mélange de la suite sont égale

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29

Franceschi, Sandro. "Approche analytique pour le mouvement brownien réfléchi dans des cônes." Thesis, Tours, 2017. http://www.theses.fr/2017TOUR4046/document.

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Le mouvement Brownien réfléchi de manière oblique dans le quadrant, introduit par Harrison, Reiman, Varadhan et Williams dans les années 80, est un objet largement analysé dans la littérature probabiliste. Cette thèse, qui présente l’étude complète de la mesure invariante de ce processus dans tous les cônes du plan, a pour objectif plus global d’étendre au cadre continu une méthode analytique développée initialement pour les marches aléatoires dans le quart de plan par Fayolle, Iasnogorodski et Malyshev dans les années 70. Cette approche est basée sur des équations fonctionnelles, reliant des

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Sànchez, Pérez Andrés. "Agrégation de prédicteurs pour des séries temporelles, optimalité dans un contexte localement stationnaire." Electronic Thesis or Diss., Paris, ENST, 2015. http://www.theses.fr/2015ENST0051.

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Cette thèse regroupe nos résultats sur la prédiction de séries temporelles dépendantes. Le document comporte trois chapitres principaux où nous abordons des problèmes différents. Le premier concerne l’agrégation de prédicteurs de décalages de Bernoulli Causales, en adoptant une approche Bayésienne. Le deuxième traite de l’agrégation de prédicteurs de ce que nous définissions comme processus sous-linéaires. Une attention particulaire est portée aux processus autorégressifs localement stationnaires variables dans le temps, nous examinons un schéma de prédiction adaptative pour eux. Dans le derni

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31

Liu, Xinwei, and Jie Sun. "Generalized Stationary Points and an Interior Point Method for MPEC." 2003. http://hdl.handle.net/1721.1/3701.

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Mathematical program with equilibrium constraints (MPEC)has extensive applications in practical areas such as traffic control, engineering design, and economic modeling. Some generalized stationary points of MPEC are studied to better describe the limiting points produced by interior point methods for MPEC.A primal-dual interior point method is then proposed, which solves a sequence of relaxed barrier problems derived from MPEC. Global convergence results are deduced without assuming strict complementarity or linear independence constraint qualification. Under very general assumptions, the alg

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32

Omoniyi, Adebayo Akinyinka. "Impact of constructivist instructional approach on grade 12 learners' understanding of stationary points in differential calculus." Diss., 2016. http://hdl.handle.net/10500/21193.

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With the realization that traditional instructional approach has not yielded satisfactory results, quasi-experimental and descriptive research designs were employed to investigate whether the application of constructivist instructional approach in the learning of stationary points in differential calculus by Grade 12 learners in South Africa would improve conceptual learning. Three Gauteng high schools of 204 Grade 12 learners constituted the research fields – one served as the control group while the other two represented the experimental group. Being a mixed-method research, quantitative

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33

Saeh, Jamal Carlos. "The performance of the non-iterative and iterative triples corrected EOMIP-CCSD in characterizing stationary points of excited state potential energy surfaces." Thesis, 2002. http://wwwlib.umi.com/cr/utexas/fullcit?p3085057.

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34

Hung, Ta-Ching, and 洪大鈞. "By comparison stationary testing with point process." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/65836542681924843440.

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(6629942), Anna N. Tatara. "Rate Estimators for Non-stationary Point Processes." Thesis, 2019.

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<div>Non-stationary point processes are often used to model systems whose rates vary over time. Estimating underlying rate functions is important for input to a discrete-event simulation along with various statistical analyses. We study nonparametric estimators to the marked point process, the infinite-server queueing model, and the transitory queueing model. We conduct statistical inference for these estimators by establishing a number of asymptotic results.</div><div><br></div><div>For the marked point process, we consider estimating the offered load to the system over time. With direct obse

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WANG, RUI-QI, and 王瑞麒. "Bayesian estimation of stationary point of a response surface methodology." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/67601530675405989561.

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Huang, Guo Zhan, and 黃國展. "Bayesian estimation of stationary point of a two factor response surface." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/45285925000590187442.

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Chen, Kuo-mei, and 陳國美. "Testing the existence of one joint point under trend stationary model." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/19614151296691025595.

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碩士<br>國立臺灣大學<br>經濟學系<br>85<br>Perron (1989) 提出：發生一次改變的時間趨勢模型比起有截距項的隨機漫步模型更適合描述總體經濟變數的時間序列資料。然而，Perron 是由目測圖形來決定不同的結構改變模型，而這些模型主要差別在於連結點是否存在,本文於是計算出 Wald 和 LM 統計量,來檢定發生一次結構改變的時間趨勢模型是否有連結點的存在。本文一方面以 $\sup$ 泛函來處理統計量中的干擾變數，並推導對應的漸近分配；另一方面則透過電腦模擬，得到 $\sup W_T$ 和 $\sup LM_T$ 的臨界值。我們的模擬結果也顯示，這個統計量的 size 幾乎不受干擾變數區間的影響，但有稍微高估的現象。而給定改變點位置下，改變幅度愈大者，檢定力也愈高；給定相同的改變幅度，改變點位置愈接近樣本尾端時，檢定力則愈好。

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Barjesteh, Nasser. "Duality relations in finite queueing models." Thesis, 2013. http://hdl.handle.net/10012/7715.

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Motivated by applications in multimedia streaming and in energy systems, we study duality relations in fi nite queues. Dual of a queue is de fined to be a queue in which the arrival and service processes are interchanged. In other words, dual of the G1/G2/1/K queue is the G2/G1/1/K queue, a queue in which the inter-arrival times have the same distribution as the service times of the primal queue and vice versa. Similarly, dual of a fluid flow queue with cumulative input C(t) and available processing S(t) is a fluid queue with cumulative input S(t) and available processing C(t). We are prima

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David, Stella Veronica [Verfasser]. "Central limit theorems for empirical product densities of stationary point processes / von Stella Veronica David." 2008. http://d-nb.info/994494777/34.

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Lee, Chang Cha, and 李長洽. "A Study of the Bayesian Estimation of the Stationary Point of Single Factor Quadratic Response Surface." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/91597397214303533460.

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碩士<br>中原大學<br>工業工程研究所<br>81<br>The stationary point of a response surface function bears the location and magnitude coordinates of the maximum or minimum response value. In the context of industrial applications, the precise determination of the location parameter implies achievment of an optimal process settings rendering an optimal yield and minimal cost. In this research, we systematically consider nine different combinations of priors. It covers the range from completely non- informativ

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Yin, Ming-Tzuoo, and 鄞銘佐. "Robot Pose Estimation Using Laser Range Finder with Iterative Closest Point Algorithm in an Unknown Stationary Environment." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/56448354772096071934.

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碩士<br>國立臺灣大學<br>電機工程學研究所<br>98<br>Localization is an important issue for robot navigation in an unknown stationary environment. ICP (Iterative Closest Point) algorithm can be used to solve problem of curve registration by the concept of least square errors. It is a useful tool for mapping matching, localization, and map building because of its capability to eliminate systematic and nonsystematic errors of robot simultaneously. However, differences in two mappings and restrictions from laser range finder make complete mapping matching impossible in actual situation. In this thesis, a method is

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KUANG, YONG-HENG, and 曠永恆. "A study on the Bayesian estimation of the stationary point of a single factor quadratic response function." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/52199504900976970043.

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QIU, HONG-WEI, and 邱鴻威. "Design &analysis of an intelligent estimation system for the stationary pointof a response surface." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/07871584916282288888.

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WU, ZHI-MING, and 吳志銘. "A study on the estimation of the stationary point of a single & dual factor quadratic response function." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/62026551920635513826.

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"Stability, stochastic stationarity and generalized Lyapunov equations for two-point boundary-value descriptor systems." Laboratory for Information and Decision Systems, Massachusetts Institute of Technology], 1988. http://hdl.handle.net/1721.1/3052.

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Ramine Nikoukhah, Bernard C. Levy and Alan S. Willsky.<br>Bibliography: p. 48-50.<br>Supported in part by a grant from the National Science Foundation. ECS-8700903 Supported in part by a grant from the Air Force Office of Scientific Research. AFOSR-88-0032 Supported in part by a grant from the Army Research Office. DAAL03-86-K-0171

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TRONCI, EDOARDO MARIA. "How to escape nonconvex regions efficiently in large scale optimization problems." Doctoral thesis, 2022. http://hdl.handle.net/11573/1635338.

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Solving large scale optimization problems, such as neural networks training, can present many challenges. Among others, the proliferation of useless stationary points, that is points where the objective function value is quite far from that of a global minimum, can pose a serious drawback for the optimization algorithm used, which is attracted by them and therefore results inefficient. In this dissertation, we propose two algorithmic schemes along the following lines. First, extending the result proposed in [1] for shallow networks, that is networks with only one hidden layer, we propose a mat

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Mondim, António Francisco da Silva. "Metodologias de superfície de resposta : uma investigação no âmbito da indústria cerâmica e do vido." Master's thesis, 2014. http://hdl.handle.net/10400.2/3182.

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Dissertação de Mestrado em Estatística, Matemática e Computação apresentada à Universidade Aberta<br>A metodologia de superfícies de resposta MSR é um conjunto de técnicas estatístico-matemáticas que visa a optimização. No nosso tipo de sociedade, orientada para um mercado globalizado onde impera a lei do mais forte, qualquer ganho de produtividade, qualquer diminuição dos custos de produção, qualquer inovação, podem marcar a diferença entre o sucesso e a falência. Falar em MSR é um sonho, implementar a metodologia é antecipar o sucesso. O processo inicia-se com a interpretação do problema, d

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BEŇADIK, Vladislav. "Diferenciální počet více proměnných pro studenty učitelství 2.stupně ZŠ." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-55720.

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This thesis includes solving the basic examples of differential calculus (especially two and three variables). The work covers examples of the solutions of the domain, the first and second partial derivatives, determining the functions of local extremes (both explicitly and implicitly given) and find the equation of the tangent plane to a point in the graphs of functions. The examples are sorted by difficulty.

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Khaleghi, Azadeh. "Sur quelques problèmes non-supervisés impliquant des séries temporelles hautement dèpendantes." Phd thesis, 2013. http://tel.archives-ouvertes.fr/tel-00920184.

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Cette thèse est consacrée à l'analyse théorique de problèmes non supervisés impliquant des séries temporelles hautement dépendantes. Plus particulièrement, nous abordons les deux problèmes fondamentaux que sont le problème d'estimation des points de rupture et le partitionnement de séries temporelles. Ces problèmes sont abordés dans un cadre extrêmement général oùles données sont générées par des processus stochastiques ergodiques stationnaires. Il s'agit de l'une des hypothèses les plus faibles en statistiques, comprenant non seulement, les hypothèses de modèles et les hypothèses paramétrique

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