LMI_SOLVE

基于Wegstein方法的求解方程的C++程序。(Wegstein-based method for solving equations C++ program.)

EMD分解C语言算法，内含EMD分解所需的三次样条插值C语言算法。(EMD decomposition algorithm C language, containing the decomposition EMD cubic spline interpolation algorithm C language.)

说明：  采用误差校正算法改进的粒子滤波器，主要解决粒子滤波局部滤波发散的问题(The use of error correction algorithms to improve the particle filter, the main particle filter to solve the problem of local filtering divergence)

三相潮流计算，使用的是牛顿拉弗逊方法。迭代较快。是解决潮流的较有效的方法。(Three-phase power flow calculation, using Newton' s method Laffer Johnson. Iterate rapidly. The trend is to solve the more effective method.)

用C语言实现二重积分数值计算，精度较高；并且仿照程序中实现二重积分的思想，可以很容易扩展到三重以上的积分。(Using C language to achieve double integral numerical calculation, high accuracy and follow the procedures realize the idea of double integral, can be easily extended to more than triple the points.)

恒温减压沸腾UDF,一个基于压力计算的水蒸发UDF程序，请大家探讨一下(boiling udf of costant T and decreasing P)

使用奇异值分解来帮助求解最小二乘问题，特别是在方程系数矩阵不满秩的情况下。(SGELSD computes the minimum-norm solution to a real linear least * squares problem: * minimize 2-norm(| b- A*x |) * using the singular value decomposition (SVD) of A. A is an M-by-N * matrix which may be rank-deficient.)

PCA算法程序设计步骤： 1、去均值 2、计算协方差矩阵及其特征值和特征向量 3、计算协方差矩阵的特征值大于阈值的个数 4、降序排列特征值 5、去掉较小的特征值 6、去掉较大的特征值(一般没有这一步） 7、合并选择的特征值 8、选择相应的特征值和特征向量 9、计算白化矩阵 10、提取主分量 (PCA algorithm programming steps: 1 to mean 2, calculation of covariance matrix and its eigenvalues and eigenvectors 3, the calculation of covariance matrix eigenvalues greater than the threshold number of 4, in descending order of eigenvalue 5, remove the smaller eigenvalue 6, remove the larger eigenvalue (usually not this step) 7, the combined choice of eigenvalues 8, select the appropriate eigenvalues and eigenvectors 9, computing whitening matrix 10, principal component extraction)

Douglas-Peucker algorithm for a 2-dimensional data with example in matlab.

对GID软件的数据进行预处理,用于有限元计算(preprocessing to gid software output data file)