qiuxinhaopiyudebijiao

划分网格一个开源的库，有限元的算法，很好用(Meshing an open source library = for finite element)

基于matlab的短时傅立叶变换，有语音读取功能！(Based on the short-time Fourier transform matlab, have voice reading!)

贝塞尔函数与汉克尔函数的Matlab实现(Bessel function and Hankel function of the Matlab implementation)

主要功能是进行高斯正算，高斯反算及透视方位投影的显示。(Main function is to be considered are Gaussian, inverse Gaussian and the perspective projection display position.)

资料中提供了对应的数据和程序，其中程序能够实现对三维数据的拟合。(It can realize data fitting)

根据 Cijkl 计算各向异性介质不同方向的速度(According to Cijkl, the velocities of anisotropic media in different directions are calculated)

拉格朗日插值函数，自己编的，供大家参考学习(Lagrange interpolation function, own, and for reference study)

自己编写的振动响应计算的matlab程序，可以运行，结果正确。(dynamic response of the system using matlab。)

test1.txt 第一列为时间t，0.001s为步长；第二列为系统的输入信号；第三列为系统的输出信号。 signal_analyzer.m首先将test1.txt 的数据读入workspace，然后进行FFT，分析出两信号的频率，输出对于输入的幅值衰减（db），输出对输入的相位差。(test1.txt the first time as t, 0.001s for the step the second as the system input signal the third as the system output signal. signal_analyzer.m first test1.txt data read workspace, and then proceed to FFT, analysis of the two signals in the frequency, the output for input amplitude attenuation (db), the output of the input phase difference.)

Mathematica计算基于力平衡变截面梁单元的质量和刚度矩阵(2D force-based finite element mathemaica)