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Regexp string pattern parser cla(Regexp string pattern parser class)

交错网格声波方程正演模拟，交错网格有限差分地震波场计算，二维的声波正演，利用空间10阶，时间2阶。(The CalCulation of the SeismiC Wave一 fieldwith Staggered-grid Finite difference Sheme)

To Check the internet connection on Windows

说明：  既可以用于高压输电网的潮流解算，又可以用于低压配电网的潮流解算，还可以同时解算输电网 加配电网的混合潮流问题,程序为PQ 分解法.(Both the trend for high-voltage transmission grid solver, but also the trend for low voltage distribution network solver, solver can also increase with the power transmission grid hybrid power flow problem, the program for the PQ decomposition.)

灰色系统GM（1，1）模型及其检验,用于时间序列预测(grey system GM（1，1）model and its testing，can be used to predict)

IEEE4,14,30,57,118,300总线matlab代码(IEEE4,14,30,57118300 bus matlab code)

MSChart操作实例，可以轻松编码实现饼图，折线图，柱状图(MSChart operation example, you can easily Coding pie charts, line charts, bar charts)

说明：  program c++ for vector quantization use k-means

对MATLAB的MAT文件进行读书，用C++语言实现(read and write mat files, using C++ Language)

backwardfoeward load flow for distribution network