xianshi

这是一个用于一维等离子体粒子模拟的Fortran程序。(This is a one-dimensional plasma particle simulation for Fortran programs.)

可以对高温状态下的混凝土材料进行准确的塑型模型构建(It can be used to construct accurate plastic model of concrete under high temperature)

说明：  共轭梯度法（Conjugate Gradient）是介于最速下降法与牛顿法之间的一个方法，它仅需利用一阶导数信息，但克服了最速下降法收敛慢的缺点，又避免了牛顿法需要存储和计算Hesse矩阵并求逆的缺点，共轭梯度法不仅是解决大型线性方程组最有用的方法之一，也是解大型非线性最优化最有效的算法之一。 在各种优化算法中，共轭梯度法是非常重要的一种。其优点是所需存储量小，具有步收敛性，稳定性高，而且不需要任何外来参数。(Conjugate gradient method Gradient) is a method between the steepest descent method and Newton's method. It only uses the first derivative information, but overcomes the disadvantage of slow convergence of steepest descent method, and avoids the disadvantage of storing and calculating Hesse matrix and solving inverse of Newton's method. Conjugate gradient method is not only one of the most useful methods to solve large-scale linear equations, but also the most effective method to solve large-scale nonlinear optimization One of the algorithms of. Among all kinds of optimization algorithms, conjugate gradient method is very important. It has the advantages of small storage, step convergence, high stability and no external parameters.)

可以实现十几位整数的四则运算，效率也较好(Four operations can be more than a dozen integer,and the efficiency is better)

利用下载的goce原始数据，计算得出含有时间/经纬度/重力梯度格式的程序(Use downloaded goce raw data, calculated with the time/latitude/gravity gradient program formats)

采用fortran编写了关于方腔顶盖驱动流的lbm程序(Prepared using fortran on navies process flow lbm)

数值分析计算课程的部分习题答案，有matlab编程，希望对大家有用。(some small matlab codes .)

s-波分裂参数计算，应用时间延迟方式,用于计算各向异性参数(shear-wave splitting time-delay calculation)

用matlab对偶极子电场线描绘，能够和等势线一起画出。改变电荷量就能得到不同的电场线分布。(Electric field line of a diple)

基于matlab的短时傅立叶变换，有语音读取功能！(Based on the short-time Fourier transform matlab, have voice reading!)