TE_PHC

FFT with fix point 2*N

偏微分方程数值解上机实习 运用古典显式差分格式求解二维扩散方程的初边值问题 运用P-R差分格式求解二维扩散方程的初边值问题

4种计算积分的方法，并对精度进行比较，梯形法则，simpson法则(4 methods for calculating integral)

多元非线性回归——岭回归方法，比常规的最小二乘更适合数据量较大的优化问题(Multiple nonlinear regression- ridge regression method is more suitable than the conventional least squares optimization problem of the large amount of data)

用FORTRAN编制的交错网格化数值模拟程序，生成共炮点理论地震记录。(using FORTRAN compiled by the staggered grid of numerical simulation program to produce a total theoretical shot seismic record.)

小波分解与最小二乘支持向量机，用于天线故障诊断。(Wavelet decomposition and least squares support vector machine for antenna diagnostics.)

该程序实现了基于罗德里格矩阵的三维坐标转换，该算法简单快速，无需迭代而具有较高的精度(The program implemented based on three-dimensional coordinate transformation matrix Rodriguez, the algorithm is simple and fast, without iteration and with high precision)

有限元求解柏松方程。本文采用FORTRAN语言编制程序。程序中大部分变量采用有名公共区存储方式存储，这样可以减少内存占用量。 IFG：生成有限元网格信息，即元素节点局部编码与总体编码对照表，节点实际坐标，边界节点编码与边界点上的已知值 GKD：生成总刚一维存储对角元的地址，计算总刚一维存储长度 FIXP：设置已知节点函数值 GK(NI,NJ,ADJ,AIJ)：单元刚度矩阵计算 GF(NI,N,M,LE,YI,FE)：单元列阵的计算 AK(I,J,AIJ)：总刚度矩阵元素迭加 QEB：总刚度矩阵和总列阵合成 BDE：边界条件处理 SOLGS：Gauss-Seidel迭代法求解方程组 UDIFF(NI,NFLAG,UDIF,LE,ADJ)：标准元素内形状函数导数计算 DIFF：节点上 ， 加权平均 (In this program, FEM was used to solve the possion equation. It is implemented through FORTRAN)

Fluent 中短语模拟水的受热蒸发相变的UDF程序代码(the UDF for phase change of water)

对于给定某一线性时不变网络（不含受控源），根据网络属性及结构，通过编程实现自动生成其关联矩阵A和一个树。(Given a linear time-invariant network (excluding controlled source), according to the network properties and structure of the automatically generated by programming its associated matrix A and a tree.)