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from matlab.the file describe the finite element method

依据两个点的经纬度计算这两点在地球上距离的函数文件，误差很小(Calculated based on latitude and longitude of two points on Earth from these two points in the function file, the error is small)

SG滤波，用于时间序列数据的平滑处理，内容有待完善(SG filtering for smoothing time series data, content needs to be improved)

实现logistic混沌功能 实现logistic混沌功能 实现logistic混沌功能 实现logistic混沌功能(Realize chaotic logistic function logistic chaotic function realize realize realize logistic function logistic chaotic chaotic function)

怎么用matlab画带箭头的直线呢？看看这个程序，也许你能用得上，程序写了一段代码，代码在直线的一头画了箭头符号！(How to use matlab draw a straight line with the arrow it? Look at this program, maybe you can apply, write a program code, the code of a straight line drawn on the arrow symbol!)

非线性规划，二次规划SQP，matlab程序求最优值(Nonlinear Programming)

voice recognition with neural networks backpropagation. this source can recognize number one two three four five six seven eight nine

线性系统频域理论的实现 包括多项式，多项式矩阵，系统的矩阵分式描述，多项式矩阵描述，系统实现等。 其中多项式描述尚未完善。(frequency domain linear systems theory, including the realization of polynomials, polynomial matrix, the matrix fraction description, polynomial matrix description of system implementation. Description polynomial which is not yet perfect.)

Hopfield recognizig pictures

利用wolfe-powell准则求解函数优化问题，使用不精确搜索法寻找最优步长，仿真正确。(Wolfe-powell guidelines for solving function optimization problems, the use of imprecise search method to find the optimal step length, the simulation is correct.)