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Dissertations / Theses on the topic 'Nonlinear function'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Deshpande, Gopikrishna. "Nonlinear and network characterization of brain function using functional MRI." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/24760.

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Thesis (Ph.D.)--Biomedical Engineering, Georgia Institute of Technology, 2007.<br>Committee Chair: Hu, Xiaoping; Committee Member: Brummer, Marijn; Committee Member: Butera, Robert; Committee Member: Oshinski, John; Committee Member: Sathian, Krish.

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2

Kytmanov, Aleksandr, Simona Myslivets, and Nikolai Tarkhanov. "Zeta-function of a nonlinear system." Universität Potsdam, 2004. http://opus.kobv.de/ubp/volltexte/2008/2679/.

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Given a system of entire functions in Cn with at most countable set of common zeros, we introduce the concept of zeta-function associated with the system. Under reasonable assumptions on the system, the zeta-function is well defined for all s ∈ Zn with sufficiently large components. Using residue theory we get an integral representation for the zeta-function which allows us to construct an analytic extension of the zeta-function to an infinite cone in Cn.

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3

Chang, Ken Kai-fu 1973. "Simulation of nonlinear optic-fibre communication systems using Volterra series transfer function techniques." Monash University, Dept. of Electrical and Computer Systems Engineering, 2002. http://arrow.monash.edu.au/hdl/1959.1/7758.

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4

Lin, Chung-Yi. "Nonlinear Green's function theory of disordered material /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487585645575385.

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5

Pan, Guangdong. "Electromagnetic Backscattering Studies of Nonlinear Ocean Surfaces." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204559229.

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6

Kim, Jongchul. "Generalized Function Solutions to Nonlinear Wave Equations with Distribution Initial Data." Thesis, University of North Texas, 1996. https://digital.library.unt.edu/ark:/67531/metadc278853/.

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In this study, we consider the generalized function solutions to nonlinear wave equation with distribution initial data. J. F. Colombeau shows that the initial value problem u_tt - Δu = F(u); m(x,0) = U_0; u_t (x,0) = i_1 where the initial data u_0 and u_1 are generalized functions, has a unique generalized function solution u. Here we take a specific F and specific distributions u_0, u_1 then inspect the generalized function representatives for the initial value problem solution to see if the generalized function solution is a distribution or is more singular. Using the numerical technics, we

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7

Sjöberg, Johan. "Some Results On Optimal Control for Nonlinear Descriptor Systems." Licentiate thesis, Linköping University, Linköping University, Automatic Control, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7489.

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<p>I denna avhandling studeras optimal återkopplad styrning av olinjära deskriptorsystem. Ett deskriptorsystem är en matematisk beskrivning som kan innehålla både differentialekvationer och algebraiska ekvationer. En av anledningarna till intresset för denna klass av system är att objekt-orienterade modelleringsverktyg ger systembeskrivningar på denna form. Här kommer det att antas att det, åtminstone lokalt, är möjligt att eliminera de algebraiska ekvationerna och få ett system på tillståndsform. Teoretiskt är detta inte så inskränkande för genom att använda någon indexreduktionsmetod kan gan

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8

Sze, Tiam Lin. "System identification using radial basis function networks." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364232.

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9

Dadashi, Shirin. "Modeling and Approximation of Nonlinear Dynamics of Flapping Flight." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78224.

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The first and most imperative step when designing a biologically inspired robot is to identify the underlying mechanics of the system or animal of interest. It is most common, perhaps, that this process generates a set of coupled nonlinear ordinary or partial differential equations. For this class of systems, the models derived from morphology of the skeleton are usually very high dimensional, nonlinear, and complex. This is particularly true if joint and link flexibility are included in the model. In addition to complexities that arise from morphology of the animal, some of the external force

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10

Ben, Daya Mohamed. "Barrier function algorithms for linear and convex quadratic programming." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/25502.

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11

Branco, Dorothy M. "Nonlinear optimization of a stochastic function in a cell migration model." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-050506-164020/.

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12

Lyubchyk, Leonid, and Galina Grinberg. "Nonlinear expert preference function concordance identification for multiple criteria decision making." Thesis, ТВіМС, 2014. http://repository.kpi.kharkov.ua/handle/KhPI-Press/36757.

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The proposal generalization of expert estimates concordance idea for the case of nonlinear preferance function guaranties on optimal concordance of mesuarement and expert data, whereas machine learning approach ensure the possibility of more accurate approximation expert preference function with complex structure.<br>Предложен подход согласования экспертных оценок для случая нелинейных функций предпочтения, который гарантирует оптимальное согласование данных измерений и экспертных данных, который при использовании методов машинного обучения обеспечивает возможность построения более точной аппр

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13

Payne, Portia. "Multiple Cause and the Discounting Principle: A Linear or Nonlinear Function?" W&M ScholarWorks, 1985. https://scholarworks.wm.edu/etd/1539625321.

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14

MoÊ¾in, Ali. "Computer aided design and analysis of nonlinear phenomena in relay control systems." Thesis, University of Sussex, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296527.

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15

Shvonski, Alexander J. "Modeling Nonlocal and Nonlinear Response Phenomena of Plasmonic and Biological Systems." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:108209.

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Thesis advisor: Krzysztof Kempa<br>In this work, we first examine nonlocal behavior in plasmonic systems and develop or expand upon models that enable calculation of higher-order, nonlocal responses for systems with novel geometries. The effects of nonlocality, i.e., spatial dispersion, are prominent in nanostuctures with small feature sizes, and accurate calculations of the nonlocal response of nanostructures are increasingly important for the study of novel physics at the nanoscale. Next, we consider a specific biological system, double-stranded DNA, and investigate the nonlocal and nonlinea

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16

Chen, Liang-kuang. "Describing function methods for the analysis of stability and performance of repetitive control of servohydraulic systems." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1102102812.

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17

Case, Lori Michelle. "An l??1 penalty function approach to the nonlinear bilevel programming problem." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21334.pdf.

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18

McNamara, O. P. "Computer-aided design of nonlinear control systems using describing function based methods." Thesis, University of Sussex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375843.

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19

Cannon, Mark. "Space-frequency localized basis function networks for nonlinear system identification and control." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36550.

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20

Nhapulo, Gerson Leonardo. "Assessing nonlinear dyanamics of central bank reaction function : the case of Mozambique." Master's thesis, Instituto Superior de Economia e Gestão, 2015. http://hdl.handle.net/10400.5/10197.

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Mestrado em Economia Monetária e Financeira<br>Esta dissertação lança alguma luz sobre os elementos que regem a tomada de decisões de política monetária durante o período 2000Q1-2015Q1 em Moçambique, ou seja, se a autoridade monetária do país, o Banco de Moçambique (BM), poderia ter-se comportado de forma diferente ao longo do tempo condicionado a pressões inflacionárias e ao desvio do produto em relação à meta, mudando entre períodos em que a inflação era a principal preocupação da política ou não. Existem várias abordagens para avaliar a dinâmica não-linear da função de reação do banco centr

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21

Mo, Eirik. "Nonlinear stochastic dynamics and chaos by numerical path integration." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1786.

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<p>The numerical path integration method for solving stochastic differential equations is extended to solve systems up to six spatial dimensions, angular variables, and highly nonlinear systems - including systems that results in discontinuities in the response probability density function of the system. Novel methods to stabilize the numerical method and increase computation speed are presented and discussed. This includes the use of the fast Fourier transform (FFT) and some new spline interpolation methods. Some sufficient criteria for the path integration theory to be applicable is also pre

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22

Lee, Kian Lam. "Nonlinear time series modelling and prediction using polynomial and radial basis function expansions." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246940.

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23

Selander, Keith N. "A function space approach to the generalized nonlinear model with applications to frequency domain spectral estimation." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-172034/.

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24

Bellows, Benjamin Davis. "Characterization of nonlinear heat release-acoustic interactions in gas turbine combustors." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-03262006-205604/.

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Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2006.<br>Dr. Jeffrey Cohen, Committee Member ; Dr. Jerry Seitzman, Committee Member ; Dr. Jeff Jagoda, Committee Member ; Dr. Ben Zinn, Committee Member ; Dr. Tim Lieuwen, Committee Chair.

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25

Sadjadi, Seyed Jafar. "Nonlinear programming using an expanded Lagrangian function, a water resources management case study." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0014/NQ30640.pdf.

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26

Cieza, Aguirre Oscar Benjamín. "Rapid continuous-time identification of linear and nonlinear systems using modulation function approaches." Master's thesis, Pontificia Universidad Católica del Perú, 2015. http://tesis.pucp.edu.pe/repositorio/handle/123456789/8123.

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At the present, system identification through modulation functions has a wide range of methods. Many of them have reached maturity levels that surpass customary Kalmanfilter approaches for discrete-time identification. In this thesis, the modulation function technique is analyzed in view of its real-time capability, as well as the possible unification of the modulation function methods based on the frequency spectrum, and ability to deal with nonlinearities. Besides, to increase the rate of convergence, the optimal parameter estimation with constraints of Byrski et al. [BFN03] is applied

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27

Peske, Wendy Ann. "A topological approach to nonlinear analysis." CSUSB ScholarWorks, 2005. https://scholarworks.lib.csusb.edu/etd-project/2779.

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A topological approach to nonlinear analysis allows for strikingly beautiful proofs and simplified calculations. This topological approach employs many of the ideas of continuous topology, including convergence, compactness, metrization, complete metric spaces, uniform spaces and function spaces. This thesis illustrates using the topological approach in proving the Cauchy-Peano Existence theorem. The topological proof utilizes the ideas of complete metric spaces, Ascoli-Arzela theorem, topological properties in Euclidean n-space and normed linear spaces, and the extension of Brouwer's fixed po

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28

Yoshikawa, Katsuyuki. "STUDIES ON NONLINEAR VISCOELASTIC BEHAVIOR OF HIGHLY ENTANGLED POLYMER SYSTEMS." Kyoto University, 2020. http://hdl.handle.net/2433/252988.

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29

Lee, Yim Kul. "Nonlinear image processing and pattern analysis by rotating kernel transformation and optical fourier transform." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/14717.

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30

Kelly, Jeremiah. "Isolating rod function in the human eye." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/isolating-rod-function-in-the-human-eye(1f695d6d-f902-480c-ae50-a990a490f5a6).html.

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The first chapter explains the motivation for measuring rod function, in particular the rod’s dynamic recovery from a substantial bleach which results in so-called ‘rate limited’ recovery of sensitivity. The physiological processes that underpin the replenishment of the rod photopigment are described and discussed, and explain the way in which rod function can act as a marker for retinal health. Overall, this chapter explains why rod function is worthy of further investigation.Then follows a description of the experimental methods used in the study of rod function, presented in later chapters.

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31

Wang, Wei-Hua. "A nonlinear function approximator : the cooperation of nonparametric concepts and a neural network approach /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487676261010179.

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32

Abraham, Isaac P. "Logistic Function based Nonlinear Modeling and Circuit Analysis of the Bipolar Vacancy Migration Memristor." Wright State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1587033379577733.

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33

Kang, Jinghong. "The Computational Kleinman-Newton Method in Solving Nonlinear Nonquadratic Control Problems." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30435.

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This thesis deals with non-linear non-quadratic optimal control problems in an autonomous system and a related iterative numerical method, the Kleinman-Newton method, for solving the problem. The thesis proves the local convergence of Kleinman-Newton method using the contraction mapping theorem and then describes how this Kleinman-Newton method may be used to numerically solve for the optimal control and the corresponding solution. In order to show the proof and the related numerical work, it is necessary to review some of earlier work in the beginning of Chapter 1 [Zhang], an

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34

Orchini, Alessandro. "Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/263562.

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In this thesis, low-order nonlinear models for the prediction of the nonlinear behaviour of thermoacoustic systems are developed. These models are based on thermoacoustic networks, in which linear acoustics is combined with a nonlinear heat release model. The acoustic networks considered in this thesis can take into account mean flow and non-trivial acoustic reflection coefficients, and are cast in state-space form to enable analysis both in the frequency and time domains. Starting from linear analysis, the stability of thermoacoustic networks is investigated, and the use of adjoint methods fo

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35

DeVane, Russell H. "Molecular dynamics and time correlation function theories." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001309.

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36

Short, Martin Bowen. "Fluids, Form, and Function: The Role of Fluid Dynamics in the Evolution of Stalactites, Icicles, and Aquatic Microorganisms." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/194746.

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This dissertation is devoted to better understanding the role that fluids play in the selection of the shapes and functions of objects and creatures in nature. Toward that end, three specific examples are considered: stalactites, icicles, and species of colonial green algae known as Volvox. In the cases of stalactites and icicles, the object's growth is considered as a free-boundary problem. For stalactites, the coupling of thin-film fluid dynamics with calcium carbonate chemistry leads to a local, geometric growth law that is proportional to the thickness of the water layer covering the s

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37

Duthoit, Jeremy. "A micromechanics-based method for off-axis strength prediction of unidirectional laminae - Approach for a nonlinear rubber based lamina." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/34367.

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In this study, a micromechanics-based method is developed to predict the off-axis strength of unidirectional linear elastic laminae. These composites fail by matrix cracking along a plane parallel to the fiber direction. The stresses in the matrix are calculated using a local stress analysis based on a concentric cylinder model. This model consists of a unique fiber embedded in matrix; both constituents are represented by cylinders. A finite element model is also constructed and the results of the two models compared. The stresses and strains from the concentric cylinder model are averaged ove

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38

Ainkaran, Ponnuthurai. "Analysis of Some Linear and Nonlinear Time Series Models." Thesis, The University of Sydney, 2004. http://hdl.handle.net/2123/582.

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Abstract This thesis considers some linear and nonlinear time series models. In the linear case, the analysis of a large number of short time series generated by a first order autoregressive type model is considered. The conditional and exact maximum likelihood procedures are developed to estimate parameters. Simulation results are presented and compare the bias and the mean square errors of the parameter estimates. In Chapter 3, five important nonlinear models are considered and their time series properties are discussed. The estimating function approach for nonlinear models is developed in d

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39

Timalsina, Samy. "Detection of Agglomeration in a Fluidized Bed Using Structure Function." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1534264606836417.

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40

Kasprzyk, Christina Ridley. "Practical applications of molecular dynamics techniques and time correlation function theories." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001644.

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41

Sun, Zhe. "A mixed particle-mode function method for nonlinear marine fluid-structure interaction problems with free surface." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/401832/.

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In this study, a computational model which couples particle method for fluid part and modal superposition for structure part is developed to investigate the Fluid Structure Interaction problems with free surface. As a Lagrangian mesh-free method, the MPS (Moving Particle Semi-implicit) method is very suitable for simulating violent flows such as breaking waves on free surface. However, despite its wide range of applicability, the original MPS algorithm suffers from some inherent difficulties in obtaining an accurate fluid pressure in both spatial and time domain. Different modifications to imp

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42

Ainkaran, Ponnuthurai. "Analysis of Some Linear and Nonlinear Time Series Models." University of Sydney. Mathematics & statistics, 2004. http://hdl.handle.net/2123/582.

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Abstract This thesis considers some linear and nonlinear time series models. In the linear case, the analysis of a large number of short time series generated by a first order autoregressive type model is considered. The conditional and exact maximum likelihood procedures are developed to estimate parameters. Simulation results are presented and compare the bias and the mean square errors of the parameter estimates. In Chapter 3, five important nonlinear models are considered and their time series properties are discussed. The estimating function approach for nonlinear models is developed in d

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43

Azizsoltani, Hamoon, and Hamoon Azizsoltani. "Risk Estimation of Nonlinear Time Domain Dynamic Analyses of Large Systems." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/624545.

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A novel concept of multiple deterministic analyses is proposed to design safer and more damage-tolerant structures, particularly when excited by dynamic including seismic loading in time domain. Since the presence of numerous sources of uncertainty cannot be avoided or overlooked, the underlying risk is estimated to compare design alternatives. To generate the implicit performance functions explicitly, the basic response surface method is significantly improved. Then, several surrogate models are proposed. The advanced factorial design and Kriging method are used as the major building blocks.

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44

Chang, Byeong-Yun. "Estimation Techniques for Nonlinear Functions of the Steady-State Mean in Computer Simulation." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4917.

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A simulation study consists of several steps such as data collection, coding and model verification, model validation, experimental design, output data analysis, and implementation. Our research concentrates on output data analysis. In this field, many researchers have studied how to construct confidence intervals for the mean u of a stationary stochastic process. However, the estimation of the value of a nonlinear function f(u) has not received a lot of attention in the simulation literature. Towards this goal, a batch-means-based methodology was proposed by Munoz and Glynn (1997). Their appr

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45

Azarskov, V. N., O. U. Kurganskyi, O. V. Ermolaeva, and G. I. Rudyuk. "Structural Identification Algorithm Based on Results of Multidimensional Nonlinear Stabilization Plant Test." Thesis, Kyiv, "Osvita Ukrainy", 2015. http://er.nau.edu.ua/handle/NAU/28365.

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46

Amankwah, Kofi. "THE IMPACT OF LOWER EXTREMITY PASSIVE JOINT PROPERTIES ON STANDING FUNCTION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1081532731.

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47

Petrova, Liudmila, and Liubov Ivkina. "Study of the group properties of the Sircar-Papanicolaou model in case of a nonlinear utility function." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-3251.

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<p>In this paper it is considered the Sircar-Papanicolaou model wich takesinto account a feedback effect of dynamic hedging strategies of pro-gramme traders. Using the Lie group analysis we describe the symmetrygroup of the main equation of the concerned model. We reduce this par-tial differential equation to the ordinary differential equations by usingcorresponding invariants of the subgroups of the main symmetry group.</p>

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48

Rahmat, Sarah Binti. "Development of a fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking." Thesis, University of Canterbury. Communication Disorders, 2015. http://hdl.handle.net/10092/11268.

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In many previous physiological and psychoacoustic studies, Schroeder-phase masking (using Schroeder harmonic complexes to mask other sounds) has proven useful in understanding different aspects of cochlear function, particularly the phase curvature of the cochlea and cochlear nonlinearity. The common method of measuring Schroeder-phase masking functions uses a very time consuming three-alternative forced choice (3AFC) process, which limits its research and clinical usefulness. This thesis describes a fast method for measuring Schroeder-phase masking functions that we developed to address this

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49

Fialho, João Manuel Ferrão. "Existence, localization and multiplicity results for nonlinear and functional." Doctoral thesis, Universidade de Évora, 2012. http://hdl.handle.net/10174/15248.

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In this thesis several problems are addressed. The problems considered vary from second order problems up to high order problems where generaliza- tions to nth order are studied. Such problems range from problems without functional dependence up to problems where the functional dependence is featured both in the equation and on the boundary conditions. Functional boundary conditions include most of the classical conditions as multipoint cases, conditions with delay and/or advances, nonlocal or in- tegral, with maximum or minimum arguments,... Existence, nonexistence, multiplicity and localizat

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50

González, Germán Iván Temoatzin. "Contributions to analysis and control of Takagi-Sugeno systems via piecewise, parameter-dependent, and integral Lyapunov functions." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/101282.

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Esta tesis considera un enfoque basado en Lyapunov para el análisis y control de sistemas no lineales cuyas ecuaciones dinámicas son reescritas como un modelo Takagi-Sugeno o uno polinomial convexo. Estas estructuras permiten resolver problemas de control mediante técnicas de optimización convexa, más concretamente desigualdades matriciales lineales y suma de cuadrados, que son eficientes herramientas desde un punto de vista computacional. Después de proporcionar una visión general básica del estado actual en el campo de los modelos Takagi-Sugeno, esta tesis aborda cuestiones sobre las funcion

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