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快速傅立叶变换的程序，附有试验用数据，希望对大家有所帮助(Fast Fourier Transform procedure, with test data, and they hope to help everyone)

有限元二维静力计算程序，采用四节点线性单元，可以显示变形和应力云图。(Finite element analysis program for 2D problems)

迎风格式有限元求解二维不可压缩流，值得学习和借鉴其中的许多内容(upwind finite element method solve incompressible fluent flow)

本程序针对内弹道的计算实现火炮内弹道计算(The procedure for the calculation of the interior ballistics Gun Interior Ballistic calculation)

用最小二乘法进行电力系统状态估计，包含IEEE30节点的电力系统图(Using least squares power system state estimation, including IEEE30 bus power system diagram)

说明：  这是简绍耦合矩阵的，为多通带的计算方法，可以方便的设计多通带微带滤波器，(This is Jane Shao coupling matrix for the multi-band calculation method, you can easily design multi-band microstrip filter)

一个优秀的解方程组的程序比如超定方程，病态方程。是我在做项目时遗留下来的，上传给大家使用！(An excellent procedure for the solution of equations such as over-determined equation, ill-conditioned equations. Yes I was doing projects left behind, upload for everyone to use!)

以上是两个内点法程序，原仿射内点法，对偶仿射内点法。初始内点需要自己给出，自动求解初始内点的程序下次发送(These are the two interior point method procedure, the original affine interior point method, dual affine interior point method. Initial interior point needs its own given the initial interior point solution of automatic procedures to send the next)

若矩阵A中的某一元素A[i，j]是第i行中的最小值，而又是第j列中的最大值，则称A[i，j]为矩阵A中的一个鞍点。请写出一个可确定此鞍点位置的算法（如果这个鞍点存在）。(If the matrix A, an element A [i, j] is the minimum value in the i-th row, but is the maximum value of the j-th column, then A [i, j] for the matrix A is a saddle point. Please write a algorithm to determine the position of saddle point (saddle point exists).)

说明：  用C语言编写多元线性回归方程，写得不好的地方请指教！(Using C language multiple linear regression equation, where poorly written, please advice!)