modal-testing

常用的分形图像的生成程序，算法为确定性算法。(interpolation)

说明：  时间序列分析中随机微分方程方面的实现,在matlab环境下实现的代码(stochastic differential equations )

matlab中值滤波源代码，对于图像处理的人员有一定的参考意义。。(median filter matlab source code for image processing personnel have some reference value. .)

讲述了现在机械故障诊断中用到的常用时频分析方法，如短时fft 魏格纳维尔分布 小波变换 HHT等，里面含有例子和详细说明，对初学者帮助很大。(Tells the now commonly used in mechanical fault diagnosis frequency analysis methods, such as short-time wavelet transform fft Wigner distribution HHT Louisville, etc., which contains examples and detailed instructions, very helpful for beginners.)

时移与坐标显示范围的不同，以及频域中f的步长不同对频域图的影响。(The times and coordinates of display range of different, and the step frequency domain f different effects on the frequency domain graph.)

离散信号,用DFT（通过FFT计算）方法分析其频谱，采用矩形窗，对不同的采样点数进行分析(Discrete signal, using DFT (via FFT calculation) method, analyze its spectrum, using rectangular windows of different sampling points for analysis)

说明：  ·Matlab加扰解扰仿真系统，可以观察加解扰前后信号的时域和频域波形，有助于理解扰码的概念和解扰的过程(scrambling and de-scrambling Matlab simulation system Encryption can be observed around the signals in time domain and frequency domain waveforms scrambler help understand the concept of the process and Descramble)

有限元SpaceTrussElement的matlab程序(FEA matlab SpaceTrussElement)

sift源代码，以及对sift原理的详细解说，附带low的sift原始源代码(the sift the source code, as well as a detailed explanation of the SIFT principle with low sift the original source code)

在matlab软件上模拟肺肿瘤生长，吸烟是诱发肺肿瘤的主要原因。(Matlab software to simulate the growth of lung cancer, lung cancer induced by smoking is the main reason.)