feng-V4.6

hybrid particle swarm optimization

SPH计算泊肃叶流动,利用周期边界条件和虚拟粒子固壁条件(SPH Code for poiseuille Flow by peoriodic boundary condtion)

平面应力、平面应变有限元数值计算,适合于有限元编程入门(plane stress and plane strain for numerical calcualtion)

说明：  一般的最小二乘通常是一次拿到全部的数据， 对所有数据进行统一优化计算得到模型系数。递推最小二乘是以一种递推的方式计算最小二乘，每次使用最新的测量值，来不断更新模型系数。(General least squares usually get all the data at one time, and perform unified optimization calculations on all the data to get the model coefficients. Recursive least squares is to calculate the least squares in a recursive way, each time the latest measured value is used to continuously update the model coefficients.)

计算多材料单元平均应力应变,用于提取计算等效弹性模量 泊松系数(Calculate the average stress-strain of multi-material elements)

lms系统逆辨识的实现，有个延时需要自己加上(lms against the identification system to achieve, there is a need to delay added by)

这些代码主要是解决数学建模中存在的一些普遍问题的。(These codes mainly deal with some common problems in mathematical modeling)

C + +程序，根据用户的输入可以产生特定的Gauss -1型切比雪夫正交规则，(C++ program which can generate a specific Gauss-Chebyshev type 1 quadrature rule, based on user input)

Code source of Finite Element Analysis with Error Estimators

一个柴油机模型，能计算柴油机的油耗率，扭矩(a diesel engine modle)