PID-algrithm

经典99行拓扑优化程序，采用Heaviside方程获得接近0-1离散解(The classical 99-line topology optimization program uses Heaviside equation to obtain nearly 0-1 discrete solution)

一款很好用的卫星重力异常布格校正Fortran90程序。(A very useful bouguer correction Fortran 90 program。)

自己编写的期望最大化（EM）算法的MATLAB实现，里面有较为运行方法和程序说明，对新手有很好的帮助( I have written the expectation-maximization (EM) algorithm in MATLAB, which has run more methods and procedures described, there is a good help for the novice)

最小二乘法拟合曲线C++代码，任意的M个数据，任意的次数N(N不易太高)。输出拟合曲线的表达式(Least Squre For ...)

使用C编写的复数矩阵求逆，使用高斯消去法，已经和matlab结果做过对比，无误(Written in C and the complex matrix inverse, using the Gaussian elimination method, has been done and matlab results contrast, correct)

一种借助lowtran7计算大气透过率和目标辐射的软件平台ART2100(A program that used for calculate air transferrate and object randience based on lowtran7)

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)

说明：  该文件内容用于相空间重构参数时间延迟和嵌入维数的计算，时间延迟的计算包含去偏复自相关函数法和互信息法，嵌入维数的甲酸包含G-P算法和FNN算法。(The contents of this file are used to calculate the time delay and embedding dimension of phase space reconstruction parameters. The calculation of time delay includes depolarization complex autocorrelation function method and mutual information method. The embedding dimension of formic acid includes G-P algorithm and FNN algorithm.)

说明：  灰色预测模型，对未来数据进行预测，同时还有误差检测(GM(1,1),Grey prediction model, which can forecast future data and detect errors at the same time)

对于交错网格上的WCNS格式进行精度测试（不带时间方向推进，仅测试空间精度）(test the order of accuracy of the WCNS scheme)