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cx
说明： 在科学与工程计算中，经常遇到求解非线性方程组的问题；非线性方程组在收敛速度及收敛性比线性方程组要差，特别对于非凸的非线性方程组，其求解更是困难。下面简要介绍非线性方程组的三种解法——牛顿法、拟牛顿法、同伦算法，分析三种解法的适用性，并附Matlab原程序。(Scientific and engineering computing, often encounter the problem of solving nonlinear equations speed of convergence of nonlinear equations and linear equations worse than convergence, especially for non-convex nonlinear equations, which is even more difficult to solve . The following briefly describes three solutions to nonlinear equations- Newton method, quasi-Newton method, homotopy method, the applicability of the three solutions, along with Matlab original program.)
- 2016-03-12 10:57:01下载
- 积分：1
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lianxu-me
电力系统连续潮流计算，以牛拉法潮流计算为基础，用来求解系统的PV曲线。(Continuous power system load flow calculation, using bovine Rafah flow calculation, based on the system used to solve the PV curve.)
- 2013-05-23 21:13:49下载
- 积分：1
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(Oxford)-Computer-Arithmetic--Algorithms-a-Hardwa
Computer Arithmetic (press 2000)
- 2012-01-27 09:45:29下载
- 积分：1
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EnsembleKalman_filter
说明： 集合卡尔曼滤波(EnKF) 数据同化方法可以避免了EKF 中协方差演变方程预报过程中出现的计算不准确和关于协方差矩阵的大量数据的存储问题,最主要的是可以有效的控制估计误差方差的增长,改善预报的效果。(Ensemble Kalman Filter (EnKF) data assimilation methods can be avoided in the EKF covariance forecasting the evolution equation arising in the course of the calculation is not accurate and on the covariance matrix of a large amount of data storage problems, the most important and effective control can be estimated error variance of the growth, improvement in forecasting results.)
- 2008-12-02 16:51:42下载
- 积分：1
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AnalyticAnelastic
二维粘弹性介质中波的传播的解析形式。应用Carcione等在1988年发表的《WAVE PROPAGATION SIMULATION IN A LINEAR VISCOELASTIC MEDIUM》一文中的方法，更加详细的介绍见英文描述。该代码对于做波场模拟的同学有很好的参考价值。( MATLABScript for obtaning the analytical solution for 2D wave propagation in a viscoelastic medium, based on the Appendix B of paper of Carcione et al. (1988)(1), corrected in (2).
The source used is a Ricker wavelet in the y velocity component.
A figure of the source temporal function and its inverse Fourier transform are provided to verify the good working of the method. Also works for elastic variables by substituting the values of vp and vs by real constant ones (vp_0 & vs_0).
Attenuation is implemented by GMB-EK rheology presented in (4) and thoroughfully explained in (3).
In order to make a proper comparison with numerical data it is recommended to either use the same rheology in both the numerical and the analytical. It is also possible to get an almost constant Q value by increasing a lot the number of mechanisms used in both the numerical and the analytical solutions, thus minimizing the effects of the Q fitting in the comparison.)
- 2012-04-23 13:18:07下载
- 积分：1
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elasticity
说明： abaqus vumat 子程序入门
UMAT FOR ABAQUS/STANDARD INCORPORATING ELASTIC BEHAVIOUR FOR PLANE STRAIN AND AXI-SYMMETRIC ELEMENTS.(introduction to abaqus vumat subroutine)
- 2020-07-08 19:20:08下载
- 积分：1
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蚁群算法优化参数
说明： 蚁群算法优化随机共振参数，用于滚动轴承故障诊断(Ant colony optimization stochastic resonance parameters, bearing fault diagnosis)
- 2021-04-06 13:29:02下载
- 积分：1
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Maple
maple学习资料，以后学习maple就不用担心了(maple learning materials)
- 2013-10-26 12:22:10下载
- 积分：1
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generation
遗传算法反演子程序，可用于地球物理非线性反演(The genetic algorithm inversion subroutine, can be used for nonlinear geophysical inversion)
- 2016-03-29 01:20:19下载
- 积分：1
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support
转子动力学研究中完整的支承松动数值仿真程序(Rotor dynamics study supports the complete relaxation of numerical simulation program)
- 2021-02-17 16:39:46下载
- 积分：1
