Prj2_exp2

create random function -

奇异值能量差分谱计算，可用于信号降噪处理(Singular value of the energy difference spectrum calculation can be used for signal noise reduction)

给出一个计算声子晶体结构的一维传递矩阵法。(Give a one-dimensional crystal structure of the phonon transfer matrix method.)

偏微分方程的数值解法，简单的离散 变分以及求解过程(Numerical solution of partial differential equations, the simple and the solution process of discrete variational)

采用了小波去噪的思想，matlab开发工具箱中的支持向量机，包括邓氏关联度、绝对关联度、斜率关联度、改进绝对关联度。( Using wavelet denoising thought, matlab development toolbox support vector machine, Including Deng s correlation, absolute correlation, correlation of slope, improved absolute correlation.)

改进了跨声速偶极子网格法（TDLM），且在颤振计算中能自动求颤振点速度，从而较大地提高了计算速度，并有利于方法在较大马赫数及较大减缩频率时的应用。(Dipole source grid method)

说明：  计算混沌系统的lyapunov指数和poincare截面(Calculation of chaotic systems lyapunov index and cross-section poincare)

计算给定序列的沃什(Walsh)变换序列。(Calculation of a given sequence of Vas (Walsh) transform sequence.)

详细介绍了有限元法基础知识，对有限元入门者很有帮助(Details the basics of the finite element method, finite element beginners helpful)

matlab求解变系数双曲方程，使用迎风格式(matlab solves the hypolic equation using upwind method)