BEM

用三元组表为结构，实现稀疏矩阵的加法并输出。(Achieve sparse matrix addition)

国外最近的一篇变步长nlms仿真，该文件有文中的几种仿真，包括基本的仿真，信道突变下的追踪性能和语音回声消除的性能分析(Recent foreign nlms a variable step simulation, the file has the text of several simulations, including basic simulation, channel tracking performance under mutation and voice echo cancellation performance analysis)

说明：  研究舍入误差的例程，可以帮助初学计算方法的人。(Of rounding error in the routine that can help beginners who calculation.)

交错网格声波方程交错网格有限差分地震波场计算波场正演模拟。 (The CalCulation of the SeismiC Wave一 fieldwith Staggered-grid Finite difference Sheme )

sod problem solved by ausm format

有限元平面应力问题计算，总体刚度矩阵矩阵压缩存储，LU分解求解(Plane stress finite element calculation, the overall stiffness matrix of compressed storage matrix, LU decomposition Solving)

11节点的潮流计算程序，导纳矩阵已经给定(calculation of power flow with 11 nodes)

TM极化入射情况，海面上有散射目标，雷达后向散射仿真，基于矩量法MoM和电磁散射理论。(EM scattering)

求解二阶变系数常微分方程,主要用于涡激振动中频率响应的计算(Solving second-order ordinary differential equations with variable coefficients)

说明：  在matlab环境下能进行各种曲线拟合的算法，非常好。(In the matlab environment to conduct various kinds of curve fitting algorithms, very good.)