xitongbianshi

解释有限元程序SAP5的原理，结构，算例的一本书籍(The finite element program SAP5 explain the principles, structure, examples)

ANSYS弹簧建模有限元分析，分析步骤很详细，供大家学习借鉴(ANSYS finite element analysis of spring modeling, analysis steps in detail, for everyone to learn)

对现在非常流行的非平行超平面进行编程，可用于twin svm等非平行问题。(Use for "Nonparallel Support Vector Machines")

使用matlab编写的时域有限差分法，pec边界的光子晶体。(Written using matlab finite difference time domain method, pec boundary of the photonic crystal.)

Abaqus UMAT code 适用于平面应变，轴对称弹塑性本构关系，也适用于大应变情况，使用显示积分算法。(Abaqus UMAT code applies to plane strain, axisymmetric elastoplastic constitutive relation, also applicable to large strain, using the integration algorithm.)

cape是计算对流有效位能和对流抑制能的一个fortran。广泛应用在大气科学计算大气垂直速度的诊断分析中。(cape is the calculation of CAPE and convective inhibition energy of a fortran. Widely used in calculation of the vertical velocity of atmospheric science and diagnostic analysis.)

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.)

基于自适应在线遗传算法整定的PID控制,每个采样时间分别对PD参数进行整定(based on adaptive online genetic algorithm tuning PID control, sampling each time the PD parameters tuning)

利用扩展卡尔曼算法( EKF)对高动态直接扩频信号的载波相位和频率进行了估计,并利用载波辅助技术测量载波相位的变化值来 校正伪码延时环,减小多普勒频移对伪码延时的影响,得到了精确的延时估计值,提 高了伪码延时锁定环的动态跟踪性能.(The PN delay loop is adjusted through measuring the varied value of carrier phase with carrier aiding technology. The effect of Doppler shift on PN code delay is reduced through carrier aid- ing technology. The precise delay estimation is obtained. The dynamic tracking performance of the PN delay loop is improved.)

fluent软件UDF，用于焊接过程模拟，是高斯分布的面热源。(weld heart source)