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Relevant bibliographies by topics / Perturbation-Based methods / Dissertations / Theses

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Dissertations / Theses on the topic 'Perturbation-Based methods'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Khabir, Mohmed Hassan Mohmed. "Numerical singular perturbation approaches based on spline approximation methods for solving problems in computational finance." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_7416_1320395978.

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Options are a special type of derivative securities because their values are derived from the value of some underlying security. Most options can be grouped into either of the two categories: European options which can be exercised only on the expiration date, and American options which can be exercised on or before the expiration date. American options are much harder to deal with than European ones. The reason being the optimal exercise policy of these options which led to free boundary problems. Ever since the seminal work of Black and Scholes [J. Pol. Econ. 81(3) (1973), 637-659], the diff

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2

Fukasaku, Kotaro. "Explorative study for stochastic failure analysis of a roughened bi-material interface: implementation of the size sensitivity based perturbation method." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41114.

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In our age in which the use of electronic devices is expanding all over the world, their reliability and miniaturization have become very crucial. The thesis is based on the study of one of the most frequent failure mechanisms in semiconductor packages, the delamination of interface or the separation of two bonded materials, in order to improve their adhesion and a fortiori the reliability of microelectronic devices. It focuses on the metal (-oxide) / polymer interfaces because they cover 95% of all existing interfaces. Since several years, research activities at mesoscopic scale (1-10µm) have

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3

Graf, Daniel [Verfasser], and Christian [Akademischer Betreuer] Ochsenfeld. "Development of efficient electronic-structure methods based on the adiabatic-connection fluctuation-dissipation theorem and Møller–Plesset perturbation theory / Daniel Graf ; Betreuer: Christian Ochsenfeld." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/123217629X/34.

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4

Jue, Stephen Gregory. "Characterizing Neurotransmitter Receptor Activation with a Perturbation Based Decomposition Method." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1631.

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The characterization of postsynaptic potentials, in terms of neurotransmitter receptor activation, is of clinical significance because information associated with receptor activation can be used in the diagnosis and study of neurological disorders. Single-unit recordings provide a method of measuring postsynaptic potentials in neurons using a microelectrode system, but yield no detailed information regarding the neurotransmitter receptors that contribute to the potential. To determine the types of neurotransmitter receptors that result in a compound postsynaptic potential from a microelectrode

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5

Ben, Gamra Siwar. "Contribution à la mise en place de réseaux profonds pour l'étude de tableaux par le biais de l'explicabilité : Application au style Tenebrisme ("clair-obscur")." Electronic Thesis or Diss., Littoral, 2023. http://www.theses.fr/2023DUNK0695.

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La détection de visages à partir des images picturales du style clair-obscur suscite un intérêt croissant chez les historiens de l'art et les chercheurs afin d'estimer l'emplacement de l'illuminant et ainsi répondre à plusieurs questions techniques. L'apprentissage profond suscite un intérêt croissant en raison de ses excellentes performances. Une optimisation du Réseau "Faster Region-based Convolutional Neural Network" a démontré sa capacité à relever efficacement les défis et à fournir des résultats prometteurs en matière de détection de visages à partir des images clai-obscur. Cependant, ce

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6

Al, Hosani Mohamed. "Transient and Distributed Algorithms to Improve Islanding Detection Capability of Inverter Based Distributed Generation." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6235.

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Recently, a lot of research work has been dedicated toward enhancing performance, reliability and integrity of distributed energy resources that are integrated into distribution networks. The problem of islanding detection and islanding prevention (i.e. anti-islanding) has stimulated a lot of research due to its role in severely compromising the safety of working personnel and resulting in equipment damages. Various Islanding Detection Methods (IDMs) have been developed within the last ten years in anticipation of the tremendous increase in the penetration of Distributed Generation (DG) in dis

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7

Dixit, Akash. "Damage modeling and damage detection for structures using a perturbation method." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43575.

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This thesis is about using structural-dynamics based methods to address the existing challenges in the field of Structural Health Monitoring (SHM). Particularly, new structural-dynamics based methods are presented, to model areas of damage, to do damage diagnosis and to estimate and predict the sensitivity of structural vibration properties like natural frequencies to the presence of damage. Towards these objectives, a general analytical procedure, which yields nth-order expressions governing mode shapes and natural frequencies and for damaged elastic structures such as rods, beams, plates an

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8

Wang, Yiwei. "Développement de stratégies de maintenance structurales prédictives pour aéronefs utilisant le pronostic à base de modèles." Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0005/document.

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La maintenance aéronautique est fortement régulée, notamment à travers l’établissement d’un planning de maintenance obligatoire, permettant de garantir la sureté structurale. La fréquence des arrêts en maintenance est déterminée de manière très conservative en vue d’assurer les exigences de fiabilité. Développer des stratégies de maintenance moins conservatives et plus efficaces peut alors représenter une voie pour une nouvelle croissance des compagnies aériennes. Les systèmes de monitoring embarqué de structures, sont progressivement introduits dans l’industrie aéronautique. Ces développement

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9

Abid, Fatma. "Contribution à la robustesse et à l'optimisation fiabiliste des structures Uncertainty of shape memory alloy micro-actuator using generalized polynomial chaos methodUncertainty of shape memory alloy micro-actuator using generalized polynomial chaos method Numerical modeling of shape memory alloy problem in presence of perturbation : application to Cu-Al-Zn-Mn specimen An approach for the reliability-based design optimization of shape memory alloy structure Surrogate models for uncertainty analysis of micro-actuator." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMIR24.

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La conception des ouvrages économiques a suscité de nombreux progrès dans les domaines de la modélisation et de l’optimisation, permettant l’analyse de structures de plus en plus complexes. Cependant, les conceptions optimisées sans considérer les incertitudes des paramètres, peuvent ne pas respecter certains critères de fiabilité. Pour assurer le bon fonctionnement de la structure, il est important de prendre en considération l’incertitude dès la phase de conception. Il existe plusieurs théories dans la littérature pour traiter les incertitudes. La théorie de la fiabilité des structures consi

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10

Wu, Chia-Pin, and 吳佳斌. "Using Singular Perturbation Methods in Observer-based Controller Design." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/88637893484414157491.

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博士<br>國立臺灣科技大學<br>電機工程系<br>100<br>The thesis is mainly to design the controller by applying the theory of singular perturbation. First of all, using the singular perturbation technique to design the output feedback controller of mechanic systems, it is similar to the design of a proportional-derivative control law. We can precede the speed control by only measuring the displacement. The controller algorithm is the rule of low-order dynamic output feedback control. It is simple and easily accomplished. Besides, when the mechanical system contains uncertain items, this thesis presents robust sta

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11

ZHAO, SHU-GUANG, and 趙樹光. "Study and comparison of stochastic optimization methods based on perturbation analysis and finite difference estimate." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/40875244403720092384.

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12

Annam, Chandrakanth. "Advanced Guidance Laws for Field-of-View and Impact Angle Constrained Engagements." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4820.

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This thesis deals with the development of guidance laws for interceptors with seeker field-of-view (FOV) and impact angle constraints. Two classes of guidance problems, namely, field-of- view and impact angle constrained guidance; midcourse guidance of dual pulse interceptors with look angle constraints, are considered in this thesis. In the first problem, decision variables are lateral acceleration commands whereas the second problem has an additional decision variable of second thrust pulse firing time. For the first problem, three guidance laws are proposed using nonlinear control the

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13

Wei, Chia-Hua, and 韋嘉驊. "A Perturbation Method for Quantization Adjustment based on TMN8 Rate Control Model." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/96933009989636497564.

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碩士<br>國立交通大學<br>電信工程系<br>90<br>The research is based on TMN8 rate control method in H.263. We know that, theoretically, the bit allocation by TMN8 for each macroblock is proportional to the product of the deviation value and the distortion weighting . The way to find the optimized quantization value Q is to predict two parameters, K and C. Although the approach to find K and C in TMN8 results in constant frame rate, the bit allocation in each macroblock usually is not the same as the theoretical value for some reasons. Now we want to find a new approach to get K and C. By the new K

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14

Huang, Chien-Chia, and 黃建嘉. "VIF-based Iterative Matrix Perturbation Method for Linear Models Having Collinearity Problems." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/82087871716756616864.

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博士<br>國立交通大學<br>運輸與物流管理學系<br>103<br>Regression modeling has been one of the most useful and important tools for statistical research. Of all the clans in regression modeling, \emph{linear regression} refers to building a linear relationship between a set of \emph{explanatory} variables and a \emph{response} variable, enabling the researchers to examine how those explantory interact with each other and affect the responses. For instance, in econometrics, by having all other factors fixed, one can perform the \emph{ceteris peribus} analysis to examine how a unit change in a given factor affects

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15

Li, Min-Chi, and 黎旻其. "An Improved Perturbation and Observation method –Based MPPT Controller for Photovoltaic Power System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/04159949392680073671.

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碩士<br>明新科技大學<br>電機工程研究所<br>101<br>Photovoltaic (PV) power system becomes an important alternative due to its merits such as freely available, environment friendly, and less maintenance cost. Hence, the demand of PV power system has increased. Tracking of the maximum power point （MPP） is an important and essential function of most of the PV power system. Every maximum power point tracking (MPPT) technique has its own merits and demerits, but the perturbation and observation （P&O）method is widely used because of its low cost and easy implementation. The P&O method may fail to track the exact MPP

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16

Liang, Wen-fan, and 梁文凡. "Permittivity and Permeability Iron-based Studies of Nanocrystalline Composite Materials by the Cavity Perturbation Method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/49472337934415582048.

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碩士<br>逢甲大學<br>航太與系統工程所<br>96<br>Resonant cavity perturbation method is a technique to obtain the complex permittivity and permeability of bulk materials or thin films at microwave frequencies. This method uses a microwave resonant circuit to measure the shift of resonant frequency and the change of quality factor in a closed rectangular or circular waveguide. In this study, the accuracy of the resonant cavity perturbation is evaluated by changing the samples sizes and lengths of Teflon and RT/duroid. To verify the formulae used in the calculation of the complex permittivity and permeability

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17

Zeng, Jin-Yu, and 曾金玉. "Enhanced Maximum Power Point Tracking control Based on Perturbation and observation Method for PV Systems." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/16803803488922117515.

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碩士<br>國立雲林科技大學<br>電子與光電工程研究所碩士班<br>100<br>This thesis presents a novel algorithm for tracking maximum power points (MPPs) for a photovoltaic (PV) system. The algorithm which combines a lookup table (LUT) method and a perturbation and observation (P&O) method can quickly and accurately track the MPPs. The LUT method makes the operating points close to MPPs by the linear relationship between the current at the MPPs and the short circuit current. And then the P&O method is adopted to obtain the MPPs. The data of LUT will be updated from the MPPs obtained by the P&O method. Therefore, the proposed

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18

Xing, X. Q., and Murali Damodaran. "Aerodynamic Shape Design of Nozzles Using a Hybrid Optimization Method." 2003. http://hdl.handle.net/1721.1/3875.

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A hybrid design optimization method combining the stochastic method based on simultaneous perturbation stochastic approximation (SPSA) and the deterministic method of Broydon-Fletcher-Goldfarb-Shanno (BFGS) is developed in order to take advantage of the high efficiency of the gradient based methods and the global search capabilities of SPSA for applications in the optimal aerodynamic shape design of a three dimensional elliptic nozzle. The performance of this hybrid method is compared with that of SPSA, simulated annealing (SA) and gradient based BFGS method. The objective functions which are

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