Search - reader

Search - reader - List

[Algorithm] hyplas DL : 11: ************************************************************************ * * * * * THIS IS THE H Y P L A S 2.0 README FILE * * ----------------- * * * * HYPLAS is a finite element program for implicit small and large * * strain analisys of hyperelastic and elasto-plastic two-dimensional * * and axisymmetric solids * * * * HYPLAS v2.0 is the companion software to the textbook: * * EA de Souza Neto, D Peric & DRJ Owen. Computational Methods for * * Plasticity: Theory and Applications. Wiley, Chichester, 2008. * * (www.wiley.com/go/desouzaneto) * * * * Copyright (c) 1998-2008 EA de Souza Neto, D Peric, D.R.J. Owen * *----------------------------------------------------------------------* * File last updated: 18 October 2008 * * * * This file belongs in the directory ../HYPLAS_v2.0 * ************************************************************************ * * * I M P O R T A N T * * * * READ SECTIONS 0 TO 3 OF THIS FILE CAREFULLY BEFORE ATTEMPTING * * TO COMPILE AND RUN THE PROGRAM HYPLAS ON YOUR COMPUTER !! * * * * THE AUTHORS DO NOT GUARANTEE THAT ANY SUGGESTIONS/INSTRUCTIONS * * GIVEN IN THIS README FILE WILL WORK ON ANY PARTICULAR OPERATING * * SYSTEM. IF YOU DECIDE TO FOLLOW ANY SUGGESTIONS/INSTRUCTIONS * * GIVEN HERE YOU MUST DO SO AT YOUR OWN RISK. * * * * * * BUG REPORTS: Please send bug reports to * * * * hyplas_v2.0@live.co.uk * * * * Messages sent to the authors' personal email addresses * * will NOT be answered. * ************************************************************************ This file contains the following sections: 0. Copyright statement and disclaimer 0.(a) Copyright statement 0.(b) Disclaimer 0.(c) Conditions of use 1. Introduction 1.(a) Note on portability 2. Compiling and running HYPLAS 2.(a) Memory requirements 2.(b) Testing a newly compiled executable 3. The HYPLAS directory tree 4. Cross-referencing between the source code and the textbook 5. HYPLAS error messaging 6. Further remarks on HYPLAS ************************************************************************ 0. COPYRIGHT STATEMENT AND DISCLAIMER ================================== 0.(a) Copyright statement ------------------- You may only use this program for your own private purposes. You are not allowed, in any circumstances, to distribute this program (including its source code, executable and any other files related to it, either in their original version or any modifications introduced by you, the authors or any other party) in whole or in part, either freely or otherwise, in any medium, without the prior written consent of the copyright holders. 0.(b) Disclaimer ---------- This program (including its source code, executable and any other files related to it) is provided "as is" without warranty of any kind, either expressed or implied, including, but not limited to, any implied warranties of fitness for purpose. In particular, THIS PROGRAM IS BY NO MEANS GUARANTEED TO BE FREE FROM ERRORS. This program (or any modification incorporated to it by you, the authors or any other party) will run entirely at your risk. The results produced by this program are in no way guaranteed to be fit for any purpose. Under no circumstances will the authors/copyright holders be liable to anyone for damages, including any general, special, incidental or consequential damages arising from the use or inability to use the program (including, but not limited to, loss or corruption of data, failure of the program to operate in any particular way as well as damages arising from the use of any results produced by the program for any purpose). 0.(c) Conditions of use ----------------- You may only use this program if you fully understand and agree with the terms of the above disclaimer. You must not use this program if you do not agree with or do not understand (fully or in part) these conditions of use. 1. INTRODUCTION ============ HYPLAS is a finite element code for small and large strain analysis of hyperelastic and elasto-plastic solids. Most procedures implemented in HYPLAS are described in detail in its companion textbook: EA de Souza Neto, D Peric & DRJ Owen. Computational Methods for Plasticity: Theory and Applications. Wiley, Chichester, 2008 (www.wiley.com/go/desouzaneto). 1.(a) Note on Portability ------------------- HYPLAS has been written in standard ANSI FORTRAN 77. Currently, the only known (and deliberate) exceptions to the FORTRAN 77 ANSI standard are the instructions: INCLUDE '' used in many routines to include the HYPLAS database files (common blocks and global variables), and; CALL GETENV('HYPLASHOME',HYPLASHOME) used in subroutine "ERRPRT" (file ../HYPLAS_v2.0/src/GENERAL/errprt.f). This instruction inquires the name of the system environment variable HYPLASHOME and writes it on the character string HYPLASHOME. This instruction is NOT part of the ANSI FORTRAN 77 standard, but seems to work in most currently available FORTRAN 77 compilers. 2. COMPILING AND RUNNING H Y P L A S ================================== The HYPLAS source code is stored in directory ../HYPLAS_v2.0/src/ (../HYPLAS_v2.0/ being the current directory) and all its subdirectories. To generate an executable file, you just need to compile the FORTRAN source files: ../HYPLAS_v2.0/src/hyplas.f and ../HYPLAS_v2.0/src/*/*.f together. We recommend that the executable HYPLAS be stored in the directory ../HYPLAS_v2.0/bin to which the environment variable HYPLASHOME should be set (see below how to set a system environmental variable). WINDOWS (R) systems ------------------- On Microsoft Windows(R) systems, HYPLAS has been successfully compiled using Intel Visual Fortran Compiler(R) integrated with Microsoft Visual Studio(R). Here you only need to create a project that contains all Fortran source files mentioned above as well as the include files ..\HYPLAS_v2.0\src\*.INC On a Windows XP system, the system environment variable HYPLASHOME can be set as follows: 1. Open a File Manager 2. Right-click on the "My Computer" icon 3. Select "Properties" on the drop-down menu 4. A new window named "System Properties" will pop-up. Here select the "Advanced" tab. 5. On the "Advanced" tab, click the "Environment Variables" button. 6. A new window titled "Environment Variables" will pop-up. Here click the button "New" in the "System Variables" section of the window. 7. A new window will pop-up titled "New System Variable". Here you should fill the fields "Variable name" and "Variable Value", respectively, with HYPLASHOME and the path name (in full) of the directory ..\HYPLAS_v2.0\bin. 8. Press "OK" on the relevant pop-up windows. 9. The next time the computer is REBOOTED, this variable will be set to the correct path and HYPLAS should be able to find the error messages file ERROR.RUN if required. UNIX/LINUX systems ------------------ In a UNIX/LINUX operating system using a C-shell, for instance, the HYPLASHOME environment variable should be set with the command: setenv HYPLASHOME where here denotes the full path to the directory ../HYPLAS_v2.0/bin. To compile HYPLAS (from directory ../HYPLAS_v2.0/src) with a FORTRAN 77 compiler such as g77, you can use the command: g77 -o ../bin/hyplas hyplas.f */*.f Note that the executable file "hyplas" will be stored in the directory ../HYPLAS_2.0/bin (i.e. the directory set in the HYPLASHOME environment variable). Alternatively, you may use the Makefile provided (with suitable modifications, if needed) to create the HYPLAS executable. IMPORTANT: Before generating a HYPLAS executable, read Sections 2.(a) and 2.(b) below. 2.(a) Memory Requirements ------------------- HYPLAS memory requirements depend on the array dimensioning parameters set in files: ../HYPLAS_v2.0/src/ ELEMENTS.INC GLBDBASE.INC MATERIAL.INC MAXDIM.INC Files ELEMENTS.INC, GLBDBASE.INC and MATERIAL.INC contain parameters which are associated with the currently implemented finite elements and materials. DO NOT MODIFY THEM ! unless you are absolutely sure of what you are doing (only developers coding new elements or new material models/analysis types may need to modify them by changing the existing dimensioning parameters and/or including new parameters). The ONLY dimensioning file that can be safely modified by the average user is the file MAXDIM.INC This file contains the array dimensioning parameters related to the maximum permissible dimension of problems to be analysed by HYPLAS. These parameters include the maximum number of nodes, elements, element groups, etc. If necessary, CHANGE THESE PARAMETERS TO SUIT YOUR PROBLEM SIZE/MEMORY REQUIREMENTS before compiling HYPLAS. 2.(b) Testing a newly compiled executable ----------------------------------- After you have successfully compiled the HYPLAS source code and created an executable file, the next step is to run some tests to verify that HYPLAS is working well. To do this, proceed as follows: The directory ../HYPLAS_v2.0/book_examples/data_files contains a series of data files named .dat of benchmarked examples described in the companion textbook. The corresponding (benchmarked) result files are in the directory ../HYPLAS_v2.0/book_examples/result_files This directory contains a series of result files named .res generated with the current version of HYPLAS on a tested platform. All these files have been named such that their names start with the textbook section number where the corresponding example is described. For instance, files 14_9_2_tresca.dat and 14_9_2_tresca.res refer to a problem described in section 14.9.2 of the textbook, and so on. To check that HYPLAS is working well on your platform, after compiling HYPLAS, run the program HYPLAS for the examples of files .dat and compare the newly generated results .res with their benchmarked counterparts (of the same filename) in the result_files directory. To run an example, execute HYPLAS and use the keyboard to enter the name of the corresponding data file in full (including the extension .dat). To compare the benchmarked .res files against their newly generated you may proceed as follows: 1. On MICROSOFT WINDOWS systems - Here we have successfully used the software "ExamDiff" (the task was made particularly easy by selecting "View" and then the "Show Differences Only" option - this refers to version 1.8 of this software). 2. On UNIX/LINUX systems - Here we use the "diff" command from a shell window (and set the option to ignore blank spaces). A shell script may be used to perform this task automatically (including running HYPLAS and checking for result file differences) for all benchmarked examples provided. IMPORTANT: THE ONLY ACCEPTABLE DIFFERENCES BETWEEN A THE NEWLY GENERATED RESULT FILES AND THEIR BENCHMARKED COUNTERPARTS ARE THE DIMENSIONING PARAMETERS (FROM FILE MAXDIM.INC) USED TO COMPILE THE NEW EXECUTABLE (THESE PARAMETERS ARE PRINTED RIGHT AT THE BEGINNING OF THE RESULT FILES) AND NUMERICAL DIFFERENCES IN RESULTS DUE TO NUMERICAL "ROUNDING-OFF" (THESE ARE VERY SMALL DIFFERENCES THAT DEPEND ON THE PRECISION OF ARITHMETIC OPERATIONS IN THE PLATFORM USED). ALSO NOTE THAT THE EXAMPLES OF THE COMPANION TEXTBOOK DO NOT COVER ALL FEATURES OF HYPLAS. HENCE THIS TEST DOES NOT GUARANTEE THAT EVERYTHING IS WORKING PROPERLY. 3. THE H Y P L A S DIRECTORY TREE ================================ 3.(a) Summary ------- ../ HYPLAS_v2.0/ bin/ book_examples/ data_files/ result_files/ man/ html/ src/ CRYSTAL/ DAMAGE/ DAMAGED_ELASTIC/ DRUCKER_PRAGER/ ELASTIC/ ELEMENTS/ GENERAL/ MATERIALS/ MATHS/ MOHR_COULOMB/ OGDEN/ TRESCA/ VON_MISES/ VON_MISES_MIXED/ 3.(b) Description ----------- The HYPLAS program directory tree is organised as follows: ../HYPLAS_v2.0/ (this directory) This is the HYPLAS root directory, where the HYPLAS directory tree starts. ../HYPLAS_v2.0/bin/ This directory contains the file ERROR.RUN where most HYPLAS error/warning messages are. IMPORTANT: the environment variable HYPLASHOME should be set to this directory. Otherwise, HYPLAS will not find its error/warning messages when required. We also recommend that the EXECUTABLE of HYPLAS be stored in this directory. ../HYPLAS_v2.0/book_examples/ This directory has the following subdirectories: ../HYPLAS_v2.0/book_examples/data_files ../HYPLAS_v2.0/book_examples/result_files Refer to Section 2.(b) above for further details. ../HYPLAS_v2.0/man/ This is the HYPLAS documentation/manuals directory. It contains the following files: input_man.txt - A concise input data manual for HYPLAS in ASCII format; hyplas_calltree.txt - Contains a flowgraph (shows the call tree) of HYPLAS in ASCII-format. Note: calls to function subprograms are not included in this flowgraph; and the subdirectory: ../HYPLAS_v2.0/man/html This directory contains the hypertext (HTML) format Fortran source code and of manual pages of the entire HYPLAS program. Manual pages with descriptions of each function/subprogram including their argument list are linked to their corresponding HTML-format source code. This allows the user the navigate through the HYPLAS source code using a web browser. To start at the main program, use your web browser to open the file hyplas.html. This facility should be helpful to those trying to understand the flow of program HYPLAS. ../HYPLAS_v2.0/src/ This directory (and its subdirectories) contains the Fortran source code of HYPLAS. The files containing the sources are named following the standard practice: .f where is the name of the FORTRAN procedure (subroutine, function subprogram, etc.) whose source code is in file .f. The source code of the HYPLAS main program is in file hyplas.f and the HYPLAS database (COMMON blocks, array dimensioning parameters and other global parameters) is coded in the "include files" ELEMENTS.INC GLDBASE.INC MATERIAL.INC MAXDIM.INC in this directory. In addition, this directory contains a file named "Makefile" (UNIX-LINUX Release only) which may be used for compiling and linking HYPLAS in UNIX/LINUX systems. The subdirectories of ../HYPLAS_v2.0/src are as follows: ../HYPLAS_v2.0/src/CRYSTAL Contains the source code of all procedures related to the finite strain single crystal plasticity model implemented in HYPLAS. ../HYPLAS_v2.0/src/DAMAGE Source files of the procedures related to the Lemaitre ductile damage model implementation. ../HYPLAS_v2.0/src/DAMAGED_ELASTIC Source files of the procedures related to the damaged elasticity model with crack closure effect. ../HYPLAS_v2.0/src/DRUCKER_PRAGER Source files of the procedures related to the implemented Drucker-Prager plasticity model. ../HYPLAS_v2.0/src/ELASTIC Source files of the procedures related to the linear elasticity model (Hencky model under large strains) implemented. ../HYPLAS_v2.0/src/ELEMENTS Source files of the element interfaces and element-related procedures. ../HYPLAS_v2.0/src/GENERAL Source files of general procedures. ../HYPLAS_v2.0/src/MATERIALS Source files of the material interfaces. ../HYPLAS_v2.0/src/MATHS Source files of the mathematical procedures. ../HYPLAS_v2.0/src/MOHR_COULOMB Source files of the procedures related to the implemented Mohr-Coulomb plasticity model. ../HYPLAS_v2.0/src/OGDEN Source files of the procedures related to the implemented Ogden hyperelasticity model. ../HYPLAS_v2.0/src/TRESCA Source files of the procedures related to the implemented Tresca plasticity model. ../HYPLAS_v2.0/src/VON_MISES Source files of the procedures related to the implemented von Mises plasticity model with isotropic hardening. ../HYPLAS_v2.0/src/VON_MISES_MIXED Source files of the procedures related to the implemented von Mises plasticity model with mixed isotropic/kinematic hardening. 4. CROSS-REFERENCING BETWEEN THE SOURCE CODE AND THE TEXTBOOK ========================================================== Many references are made in the textbook to various subprograms of HYPLAS. These are usually made when a particular procedure described in the text is implemented in the program. The reader should refer to the textbook index. Also, a substantial number of comment lines have been added to the source code of HYPLAS with reference to sections, figures, boxes, etc of the textbook related to the part of the code in question. Such references are usually displayed after the word "REFERENCE:" (in capitals) on commented lines. Searching for this word will take you to the line of code where the particular routine has a reference to the textbook. NOTE: Occasional references to other textbooks/journal papers are also made following the word "REFERENCE:" on commented lines. 5. HYPLAS ERROR MESSAGING ====================== Most error/warning messages issued by HYPLAS are in the ASCII-format file ERROR.RUN (kept in the HYPLASHOME directory - ../HYPLAS_v2.0/bin). All such error/warning messages have an identification code (e.g. ED0015) which is printed both to the standard output (this is usually the computer screen) and to the relevant results file. If you wish to find where in the source code a particular message is being issued, then perform a search for the corresponding message identification code in the entire source code of HYPLAS. 6. FURTHER REMARKS ON HYPLAS ========================= 6.(a) Program efficiency THIS SECTION IS OF INTEREST ONLY TO THOSE WANTING TO MAKE HYPLAS RUN FASTER. It is particularly stressed in the textbook that this program has not been designed having efficiency in mind (refer to Section 5.1.2 of the textbook). Its structure has been designed mainly to illustrate in a relatively clear manner the computer implementation of the techniques and algorithms described in the text, with a particular view to the implementation of solid constitutive models and finite elements. For those who are especially interested in the speed of the code, there are a few tips that could help in this direction. Unfortunately, these involve modifications to the source code which is probably most appropriate to readers with a good level of experience in finite element programming. To those with this particular interest, we can suggest the following: (i) The use of faster linear solvers This is probably the change that would result in a greater gain in efficiency. The Frontal Method adopted in subroutine FRONT (file ../HYPLAS_v2.0/src/GENERAL/front.f) has been designed originally to save memory (back in the days when computer memory was severely limited). There are currently a vast number of methodologies which focus on speeding up the linear solution, in addition to reducing memory storage requirements (which is a particularly important issue in the solution of large scale problems). Some of these are extensions/refinements of the original Frontal solver. We remark that a number of such procedures (with their respective source codes) are available (conditions may apply) from the LAPACK (Linear Algebra PACKage - http://www.netlib.org/lapack) repository or from the HSL Library (http://www.cse.cse.scitech.ac.uk/nag/hsl). For the reader interested in gaining speed, we would recommend the replacement of the existing solver of FRONT by a faster one. We remark though that this is a substantial programming task. Another aspect here is the fact that computing times in FRONT are directly linked to the frontwidth of the system which, in the present version of HYPLAS is fixed and depends, for a given mesh, on how the degrees of freedom are numbered (node numbering). The incorporation of a frontwidth optimiser (which re-numbers the degrees of freedom in order to minimise the frontwidth) in FRONT could produce some good savings in computing times. Such savings become particularly noticeable in larger problems where the original node numbering produces an excessively large frontwidth. (ii) Material-specific computations The issues pointed out here affect only the computing times for specific material models and are expected to have a much lower impact in overall speed than the linear solver issue discussed above. Some of the material model-specific computations carried out in HYPLAS could be made a bit faster. For example, for isotropic models whose stress update is carried out in the principal stress space (such as the Tresca and Mohr-Coulomb models - see routines SUTR and SUMC, files ../HYPLAS_v2.0/src/TRESCA/sutr.f and ../HYPLAS_v2.0/MOHR_COULOMB/sumc.f, respectively) the spectral decomposition of the stress in carried out in the state update update routine and then repeated in the corresponding routine for computation of the consistent tangent operator (refer to files ../HYPLAS_v2.0/src/TRESCA/cttr.f and ../HYPLAS_v2.0/src/MOHR_COULOMB/ctmc.f, respectively, for the Tresca and Mohr-Coulomb plasticity models). Some savings in computing time can be achieved here by storing the stress eigenprojection tensors (these can be stored as state variables) during the execution of the state updating and then retrieving them later for use in the computation of the consistent tangent operator. This change can be incorporated to the code relatively easily. The computation of the exponential map and is derivative for the single crystal plasticity model (routines EXPMAP, file ../HYPLAS_v2.0/src/CRYSTAL/expmap.f and DEXPMP, file ../HYPLAS_v2.0/src/CRYSTAL/dexpmp.f) is carried out in three dimensions (these routines have been adapted from an earlier three-dimensional code). To improve efficiency, these can be adapted to work only in two-dimensional problems by removing the unnecessary operations related to the third dimension. 6.(b) Output of nodal averaged values The reader should be aware that the way in which nodal averaged values of stresses and other variables are calculated in HYPLAS is very basic (and rudimentary). This feature of the program is made available only to help those interested in producing contour plots, etc from results presented in HYPLAS result files and should be useful in many circumstances of interest. This facility has in fact been used in producing many of the figures presented in the textbook. But note, for example, that the values of incremental plastic multipliers for plasticity models may take (inadmissible) negative values when extrapolated from Gauss-point to nodes and averaged. We remark that more sophisticated and refined techniques of transferring Gauss point values of variables to nodal points and obtaining the corresponding smoothed field are available in the current literature. These fall outside the scope of the companion textbook of HYPLAS.
Date : 2011-07-29 Size : 10.5mb User : gtcewli3
[Algorithm] 数据结构算法与应用-C语言描述 DL : 0: 数据结构算法与应用-C语言描述阅读软件：Adobe Reader 7.0-data structure algorithms and application-C language description reading software : Adobe Reader 7.0
Date : 2026-01-16 Size : 11.23mb User : 陈
[Algorithm] read_write_dib DL : 0: 图形模式下读写屏幕象点，全是C语言原代码-graphics mode screen reader like, all the original C language code
Date : 2026-01-16 Size : 8kb User : ggg
[Algorithm] GaussMat DL : 0: 完全自编Gauss消去法矩阵方程求解程序，各子函数独立小巧，可读性强，矩阵维数可自定义，适用于复杂的线型代数齐次、非齐次方程的求解 -completely self Gauss elimination matrix equation procedures, the independent Functions compact, reader-friendly, Matrix dimension can be self-definition, applicable to complex linear algebra homogeneous, non-homogeneous equation solving
Date : 2026-01-16 Size : 1kb User : cc
[Algorithm] BSample DL : 0: 附件程序是一个B样条程序的图形文件，读者可以直接下载到硬盘上，编译运行。-Annex procedures is a B-spline process graphic files, the reader can directly download to your hard disk, run the compiler.
Date : 2026-01-16 Size : 31kb User : 朱军
[Algorithm] inv_fixed DL : 0: 亲手所编，定点矩阵求逆，包括定点的相加、相减、相乘、相除。其中，考虑了运算过程中的Q值，精度，溢出相关问题，并且使用了大数运算，以补码形式表示大数。读者可以根据此代码根据需要进行扩展！-Made by hand, fixed-point matrix inversion, including fixed-point of the sum, subtraction, multiplication, division. Among them, taking into account in the process of computing Q values, precision, overflow-related issues, and used the lump sum for the computation in order to complement the form of large numbers. According to the code reader can be expanded as needed!
Date : 2026-01-16 Size : 13kb User : cjs
[Algorithm] VibrationSimulationUsingMATLABandANSYS_muya DL : 2: 转载：众所周知有限元解决振动问题的能力还是有限的, 比如做齿轮啮合过程的动力学模拟就要同时涉及到接触和动力反映两个主要方面. 目前处理此类问题最成熟的软件当属MSC.ADAMS, 但ADAMS也只能在模拟过程中做到弹性与刚性接触而已! 据我所知, 已不止两位研究生试图用LS-DYNA来做此类模拟, 他们忽略了(或没搞清楚) LS-DYNA只能处理瞬态问题, 而对于该过程的模拟也是无能为力的!!! 结果是浪费了大量的时间, 甚至机会. 这本应是导师的责任, 但许多高龄导师对现代软件的不熟悉也是....那么此类问题的具体解决方案在哪里? Vibration Simulation Using Matlab and ANSYS 给出了答案. 掌握书中的内容意义非同小可! 这对于要从事CAE工作的将会受益(起码在今后20年内).随着我国经济的高速发展解决资本积累必将是要遇到的问题, 工程(设备)维护, 系统监测也将(象发达国家)成为CAE非常重要的部分. 早早入手就能使你立于不败之地!-This book has three main purposes. The first purpose is to cc..-ct in one document the various methods of constructing and representing dynamic mechanical models. The second purpose is to help the reader develop a strong understanding of the modal analysis technique, where the total response of a system can be constructed by combinations of individual modes of vibration. The third purpose is to show how to take the results of large finite element models and reduce the size of the model (model reduction), extracting lower order state space models for use in MATLAB.
Date : 2026-01-16 Size : 7.54mb User : 何红亚
[Algorithm] matlab_trm DL : 0: MATLAB 有约束信赖域算法，以四元多项式为算例适用于学习最优化算法的数学专业学生以及其他数值分析课程的同学，程序清晰，对MATLAB的学习也有很大的帮助，同时程序还有一些不足，读者自己须根据实际问题更正。-MATLAB constrained trust region algorithm to quaternion polynomial example for the application of optimization algorithms in the learning of mathematics students, as well as other courses in numerical analysis of the students, the program clearly and learning to MATLAB is also a great help, but the procedure also There are a number of shortcomings, the reader himself to be corrected in accordance with the actual problem.
Date : 2026-01-16 Size : 1kb User : 李龙
[Algorithm] quanmeijindian-shuzhifenxi DL : 0: 本书内容丰富且颇具特色。本书综述了数值分析领域的诸多内容，包括配置多项式、有限差分、阶乘多项式、求和法、Newton公式、算子与配置多项式、祥条、密切多项式、TaylM多项式、插值、数值微分、数值积分、和与级数、差分方程、微分方程、最小二乘多项式逼近、极小化极大多项式逼近、有理函数逼近、三角逼近、非线性代数、线性方程组、线性规划、边值问题、MonteCarIo方法等内容。本书的特色主要表现在利用例题及大量详细的题解来透彻地阐明所述内容的内涵，同时附有大量的补充题以便读者进一步巩固和深化从书中获得的数值分析知识。本书可作为理工科大学生、电大、函授生学习数值分析的教科书，更适合用作理论性较强的数值分析教程的参考书。也可作为自学数值分桥课程者的读本。 -This book is rich in content and characteristics. This book reviews the many areas of numerical analysis, including the configuration polynomial, finite difference, factorial polynomials, summation, Newton formula, operator and configuration polynomial, Cheung section, close polynomials, TaylM more item type, interpolation, numerical differentiation, numerical integration, and with the series, differential equations, differential equations, least squares polynomial approximation, minimax polynomial approximation, rational function approximation, triangular approximation, non-linear algebra, linear equations, linear programming, boundary value problems, MonteCarIo methods and so on. Characteristics of this book is mainly manifested in the use of Example and the solution of a large number of detailed questions to thoroughly clarify the meaning described in the content, accompanied by a large number of supplementary questions in order to further consolidate and deepen the reader from
Date : 2026-01-16 Size : 7.23mb User : yangiy
[Algorithm] genesis_source_2.0_080416.tar DL : 0: 处理海洋中传播路径的源代码非常好用方便-This report is adapted from the master’s thesis of the same title by James A. Hawkins. Soon after enrolling in the Department of Physics in 1984, Mr. Hawkins began work on the wind turbine noise propagation project. The date of his M.S. degree is December 1987. Professor C. W. Horton, Sr., was the second reader of the thesis.
Date : 2026-01-16 Size : 73kb User : 成虎
[Algorithm] SpectraLib DL : 0: This toolbox contains the code written to perform various spectral clustering algorithms. The details related to the code and some experiments is available in [VM03]. This document is very short and the reader is encourage to look at the directories to see other code.
Date : 2026-01-16 Size : 78kb User : cc
[Algorithm] ansys_Stifness_Mass_Matrix_Reader DL : 0: 提取ANSYS有限元模型中刚度、质量矩阵的程序-Ansys Mass and stiffness matrix reader
Date : 2026-01-16 Size : 4kb User : kimliu
[Algorithm] 2Unary-quadratic-equation DL : 0: 用visual c++解一元二次方程。方程的各系数由读者自行给出。-To solve Unary quadratic equation by useing visual c++ . The coefficients of equation are given by the reader .
Date : 2026-01-16 Size : 250kb User : 刘亚亮
[Algorithm] MatrixExample DL : 0: 矩阵计算，基于VC++。NET的矩阵类的设计，包含了多个矩阵运算，但是还有些许功能不足，有需要的读者自己去进行加深学习-Matrix calculation, based on VC++. NET class design matrix, contains a number of matrix operations, but there is little function, and there is a need to deepen the reader to learn
Date : 2026-01-16 Size : 5.23mb User : liuyong
[Algorithm] An-Introduction-To-The-Kalman-Filter DL : 0: In putting together this course pack we decided not to simply include copies of the slides for the course presentation, but to attempt to put together a small booklet of information that could stand by itself. The course slides and other useful information, including a new Java-based Kalman Filter Learning Tool are available at http://www.cs.unc.edu/~tracker/ref/s2001/kalman/ In addition, we maintain a popular web site dedicated to the Kalman ﬁ lter. This site contains links to related work, papers, books, and even some software. http://www.cs.unc.edu/~welch/kalman/ We expect that you (the reader) have a basic mathematical background, sufﬁ cient to understand explanations involving basic linear algebra, statistics, and random signals. -In putting together this course pack we decided not to simply include copies of the slides for the course presentation, but to attempt to put together a small booklet of information that could stand by itself. The course slides and other useful information, including a new Java-based Kalman Filter Learning Tool are available at http://www.cs.unc.edu/~tracker/ref/s2001/kalman/ In addition, we maintain a popular web site dedicated to the Kalman ﬁ lter. This site contains links to related work, papers, books, and even some software. http://www.cs.unc.edu/~welch/kalman/ We expect that you (the reader) have a basic mathematical background, sufﬁ cient to understand explanations involving basic linear algebra, statistics, and random signals.
Date : 2026-01-16 Size : 525kb User : ele rock
[Algorithm] FORTRAN-90 DL : 0: FORTRAN语言是世界上最早出现的高级语言，在科学计算、数值分析和工程设计等领域有着十广泛的应用。从1954年第一个FORTRAN语言版本问世至今，FORTRAN语言有了很大发展。FORTRAN语言的发展使这门古老的语言焕发出新的活力。　　本书介绍FORTRAN90程序设计的基本方法，努力培养读者的程序设计能力。主要内容有：FORTRAN程序基础、顺序结构程序设计、选择结构程序设计、循环结构程序设计、FORTRAN90数据类型、格式输入输出、数组、子程序、结构体、指针、文件、FORTRAN90图形操作。作者针对初学者的特点，力求做到内容丰富、取材新颖、循序渐进、注重实用、便于教学。　　本书可作为高校理工科学专业学生学习程序设计的教材，也可供软件开发人员参考。　-FORTRAN language is the world s earliest high-level language, in scientific computing, numerical analysis and engineering fields has more than ten wide range of applications. From 1954, the first since the advent of FORTRAN languages, FORTRAN language has developed significantly. FORTRAN language development so that the ancient language to breathe new vitality. This book describes the basic method of FORTRAN90 program design, program design and strive to cultivate the reader s ability. The main content: FORTRAN program based on order structured programming, selection procedures for structural design, structural programming cycle, FORTRAN90 data type, format, input and output, arrays, subroutines, structures, pointers, files, FORTRAN90 graphics operations. Author features for beginners, and strive to achieve rich, drawn novel, step by step, focus on practical, easy to teaching. Polytechnic University as a science book, students learn programming textbooks, reference is also availabl
Date : 2026-01-16 Size : 3.92mb User :
[Algorithm] fdy DL : 0: windsat卫星风场数据读写操作及说明-windsat reader
Date : 2026-01-16 Size : 1kb User : fdy
[Algorithm] 1dfdtd0 DL : 0: 程序使用一维FDTD模拟真空中TEM波的传播，采用一阶Mur吸收边界，源点强制加源，双向行波，从而是读者很形象的理解FDTD算法！-TEM wave propagation in the vacuum of one-dimensional FDTD simulation program, using the first-order Mur absorbing boundary force plus the source of the source, two-way traveling wave, which is the very image of the reader s understanding of FDTD method.
Date : 2026-01-16 Size : 1kb User : li
[Algorithm] vb-source-code DL : 0: 光盘使用指南本光盘包括三个子目录，内容分别如下： 1、子过程该子目录下包含了“VB常用算法大全”书中的全部常用算法子过程。所有的常用算法子过程按书中的章数分别放在以C开头的子目录中。 2、验证子过程该子目录下按章存放验证上述常用算法子过程的全部验证子过程。所有这些为验证上述子过程而编的过程按书中的章数分别放在以D开头的子目录中。 3、工程该子目录下包含所有为验证上述子过程而做的工程，按书中的章数分别放在以V开头的子目录中。实际上，读者最方便的是配合书中的说明，在VB系统下直接调用以V开头的子目录中的工程，按运行键，即显示计算结果，从而可迅速，方便地使用该算法。达到事半功倍的效果。-CD-ROM User Guide This CD includes three subdirectories, contents are as follows: 1, sub-processes This subdirectory contains all the commonly used algorithm for sub-processes of the VB common algorithms Filmography "book. All Commonly used algorithm for sub-process according to the number of chapters in the book on the beginning of the C subdirectory. 2, the authentication sub-processes Go by the store to verify the commonly used algorithm for sub-process of verification sub-process in the subdirectory. All of these Compiled to verify the above sub-processes according to the number of chapters in the book on the beginning of the D subdirectory. 3, Engineering This subdirectory contains all the works done for the verification of the above sub-processes, according to the number of chapters in the book on the V at the beginning of a subdirectory. In fact, the reader is most convenient with the book, call directly to V a
Date : 2026-01-16 Size : 461kb User : steven
[Algorithm] chap12 DL : 0: 子体模拟对于各个计算组织，等离子体的模拟一直是个极大的挑战，有很多不同近似程度的模拟计算方法。包括完整的动力学计算方法，流体近似方法和关于漂移扩散方程的方法。近几年来，有人用Fokker-Planck方程处理等离子体中的电子，同时把离子当作流体进行耦合计算，获得了很好的计算结果。本章我们将介绍基于通用Fokker-Planck方程的计算求解过程，并通过一个具体实例得到电容放电过程的电子密度分布。希望通过该简单模型使读者对等离子放电建模过程有个初步的了解。-The sub-body simulations for various computing organizations, the simulation of the plasma has been a great challenge, there are many different approximate degree of simulation methods. Including the full dynamics calculation method, the fluid approximation method and on the drift-diffusion equation. In recent years, some people use the Fokker-Planck equation to deal with the electrons in the plasma, ions as a fluid coupling calculation to get a good calculation. In this chapter we will introduce the generic Fokker-Planck equation-based computing solution process, and through a concrete example of the distribution of electron density of the capacitor discharge process. Plasma discharge modeling process has a basic understanding of the reader through the simple model.
Date : 2026-01-16 Size : 7.14mb User : cichin

« 12 »