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Parameter Optimisation of Stress-strain Constitutive Equations Using Genetic algorithms

Journal of Materials Science & Technology 2003年第z1期19卷 5-8页

作者： Y. Y. Yang M. Mahfouf D.A.Linkens Department of Automatic Control and Systems Engineering University of Sheffield Mappin St. Sheffield S1 3JD UK Department of Automatic Control and Systems Engineering University of Sheffield Mappin St. Sheffield S1 3JD UK Department of Automatic Control and Systems Engineering University of Sheffield Mappin St. Sheffield S1 3JD UK

The accuracy of numerical simulations and many other material design calculations, such as the rolling force, rollingtorque, etc., depends on the description of stress-strain relationship of the deformed materials. One common methodof describing the stress-strain relationship is using constitutive equations, with the unknown parameters fitted byexperimental data obtained via plane strain compression (PSC). Due to the highly nonlinear behaviour of the constitutive equations and the noise included in the PSC data, determination of the model parameters is difficult. Inthis paper, genetic algorithms were exploited to optimise parameters for the constitutive equations based on thePSC data. The original PSC data were processed to generate the stress-strain data, and data pre-processing wascarried out to remove the noise contained in the original PSC data. Several genetic optimisation schemes have beeninvestigated, with different coding schemes and different genetic operators for selection, crossover and *** was found that the real value coded genetic algorithms converged much faster and were more efficient for theparameter optimisation problem.

关键词： Genetic algorithms, Parameter optimisa tion, Aluminium alloy, Flow stress, Constitutive equations

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Genetic algorithms for determining the parameters of cellular automata in urban simulation

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Science China Earth Sciences 2007年第12期50卷 1857-1866页

作者： LI Xia YANG QingSheng LIU XiaoPing School of Geography and Planning Sun Yat-sen University Guangzhou 510275 China School of Geography and Planning Sun Yat-sen University Guangzhou 510275 China School of Geography and Planning Sun Yat-sen University Guangzhou 510275 China

This paper demonstrates that cellular automata(CA) can be a useful tool for analyzing the process of many geographical *** are many studies on using CA to simulate the evolution of *** dynamics is determined by many spatial *** contribution of each spatial variable to the simulation is quantified by its parameter or *** procedures are usually required for obtaining a suitable set of parameters so that the realistic urban forms can be *** pa-rameter has a unique role in controlling urban morphology in the *** this paper,these pa-rameters for urban simulation are determined by using empirical *** algorithms are used to search for the optimal combination of these *** are spatial variations for urban dynam-ics in a large *** sets of parameters can be used to represent the unique features of urban dynamics for various subregions.A further experiment is to evaluate each set of parameters based on the theories of compact *** is considered that the better set of parameters can be identified ac-cording to the utility function in terms of compact *** set of parameters can be cloned to other regions to improve overall urban *** original parameters can be also modified to produce more compact urban forms for planning *** approach can provide a useful ex-ploratory tool for testing various planning scenarios for urban development.

关键词： Cellular automata, genetic algorithms, planning scenarios, compact development

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Application of Chaos in Genetic algorithms

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Communications in Theoretical Physics 2002年第8期38卷 168-172页

作者： YANG Li-Jiang CHEN Tian-Lun Department of Physics Nankai University Tianjin 300071 China Department of Physics Nankai University Tianjin 300071 China

Through replacing Gaussian mutation operator in real-coded genetic algorithm with a chaotic mapping, wepresent a genetic algorithm with chaotic mutation. To examine this new algorithm, we applied our algorithm to functionoptimization problems and obtained good results. Furthermore the orbital points' distribution of chaotic mapping andthe effects of chaotic mutation with different parameters were studied in order to make the chaotic mutation mechanismbe utilized efficiently.

关键词： genetic algorithms, chaos, function optimization

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NASA Technical Reports Server (Ntrs) 20050206421: Magnetospheric Radio Tomography: Observables, algorithms, and Experimental Analysis

引用

2017年

NASA Technical Reports Server (Ntrs) 20050206421: Magnetospheric Radio Tomography: Observables, algorithms, and Experimental Analysis by NASA Technical Reports Server (Ntrs); published by

关键词： (ntrs) 20050206421: algorithms algorithms, analysis cummer, steven experimental image reconstruction magnetic fields magnetospheric electron density nasa technical reports server (ntrs) radio transmission remote sensing space weather students tomography

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Quantitative Neuroscience : Models, algorithms, Diagnostics, and Therapeutic Applications

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2016年

作者： p. m. pardalos

Quantitative Neuroscience : Models, algorithms, Diagnostics, and Therapeutic Applications by Pardalos, P. M. (Panos M.), 1954- Editor; published by Springer US

关键词： algorithms, applications diagnostics, electroencephalography epilepsy models, models, neurological nervous system neuroinformatics neuroscience neurosciences

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Mathematics and Computer Science III [electronic Resource] : algorithms, Trees, Combinatorics and Probabilities

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2016年

作者： michael drmota

Mathematics and Computer Science III [electronic Resource] : algorithms, Trees, Combinatorics and Probabilities by Drmota, Michael; Flajolet, Philippe; Gardy, Danièle; Gittenberger, Bernhard; published by Basel : Bir... 详细信息

关键词： [electronic algorithms, combinatorial analysis combinatorics computer computer science distribution (probability theory) mathematics probabilities visualization

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Eric Ed282549: Teaching for the Future with algorithms, Learning Modules, and Microcomputers: an Accounting Example

引用

2016年

Eric Ed282549: Teaching for the Future with algorithms, Learning Modules, and Microcomputers: an Accounting Example. by Eric; published by

关键词： accounting algorithms algorithms, business administration education computer assisted instruction ed282549: eric archive example. future higher education learning learning modules microcomputers student attitudes teaching methods

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NASA Technical Reports Server (Ntrs) 19880007893: Calibration of Neural Networks Using Genetic algorithms, with Application to Optimal Path Planning

引用

2017年

NASA Technical Reports Server (Ntrs) 19880007893: Calibration of Neural Networks Using Genetic algorithms, with Application to Optimal Path Planning by NASA Technical Reports Server (Ntrs); published by

关键词： (ntrs) 19880007893: algorithms algorithms, application calibrating calibration computer programming genetic algorithms greenwood, daniel nasa technical reports server (ntrs) network analysis neural nets paths pitney, gilbert a. smith, terence r. trajectory planning

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NASA Technical Reports Server (Ntrs) 19830015863: Relationships Between Chlorophyll Density and Ocean Radiance as Measured by U2/Ocs: algorithms, Examples and Comparison

引用

2016年

NASA Technical Reports Server (Ntrs) 19830015863: Relationships Between Chlorophyll Density and Ocean Radiance as Measured by U2/Ocs: algorithms, Examples and Comparison by NASA Technical Reports Server (Ntrs); publis... 详细信息

关键词： (ntrs) 19830015863: algorithms algorithms, bays (topographic features) between chlorophyll chlorophylls computer programs data processing density (number volume) hart, w. d. kim, h. h. mathematical models nasa technical reports server (ntrs) ocean color scanner program verification (computers) radiance tables (data) upwelling water

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NASA Technical Reports Server (Ntrs) 19910013410: Grasp/Ada: Graphical Representations of algorithms, Structures, and Processes for Ada. the Development of a Program Analysis Environment for Ada: Reverse Engineering Tools for Ada, Task 2, Phase 3

引用

2017年

NASA Technical Reports Server (Ntrs) 19910013410: Grasp/Ada: Graphical Representations of algorithms, Structures, and Processes for Ada. the Development of a Program Analysis Environment for Ada: Reverse Engineering T... 详细信息

关键词： (ntrs) 19910013410: ada (programming language) algorithms algorithms, analysis computer graphics computer programs cross, james h., ii development graphic arts human-computer interface nasa technical reports server (ntrs) reverse engineering software engineering subroutine libraries (computers)

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