source-code

一些基本的小波变换程序，拿来与大家共享，可能对初学者有些帮助(Wavelet transform some of the basic procedures used with the U.S. share may be helpful for beginners)

给出了matlab的总共90个实例的源程序(Matlab given a total of 90 examples of the source)

说明：  利用matlab软件编写的格子玻尔兹曼方法模拟的圆柱绕流问题，并实现了可视化(The flow around the cylinder is simulated by lattice Boltzmann method compiled by MATLAB software, and the visualization is realized)

实现对一个信号源的doa估计，非常有用，对初学者很用帮助(Achieve a signal source doa estimation, very useful)

一维褶积 雷克子波与地层序数 地震资料正演方法(One-dimensional convolution Ricker wave formation ordinal)

Unitire轮胎模型与滑移率的Simulink模型(Simulink Model of Unitire Tire Model and Slip Rate)

说明：  duffing混沌系统的分岔分析，含有详细程序(duffing bifurcation analysis of chaotic systems, containing detailed procedures)

机械齿轮的参数优化，设计一直齿圆柱齿轮传动, 已知其齿数比u= 4, 小轮轴 扭矩T 1= 100N. m, 单向传动, 润滑良好, 非对称布置, 两齿 轮材料 小齿轮40Cr, 调质, 齿面硬度HB= 250~ 280, [ RH ] 1 = 630MPa, [ RF ] 1= 288MPa 大齿轮45 钢, 调质, 齿面硬度 HB= 220~ 250, [ RH ] 2= 550MPa, [ RF ] 2= 204MPa, 取载荷系 数K = 1. 28。(Parameter optimization of the mechanical gear design has been Cylindrical Gear, known gear ratio u = 4, small axle torque T 1 = 100N m, one-way transmission, well-oiled, non-symmetrical arrangement of the materials of the two gears pinion 40Cr quenched and tempered tooth surface hardness HB = 250 ~~ 280 [RH] 1 = 630 MPa [RF] 1 = 288MPa large gear 45 steel, quenched and tempered tooth surface hardness HB = 220 to 250, [RH] = 550MPa , [RF] 2 = 204MPa, to take load factor K = 1 28.)

Contrast Enhancement Utilities (Image Equalization)

因为傅立叶变换对应的是无限信号,信号经过分帧后变成有限信号,分帧的信号再进行傅立叶变换后,高频部分将有 泄露 ,所以要加窗. 窗函数的拼谱都是在某高频部分截止,所以每帧信号加窗后的傅立叶变化,频谱基本 泄露 (Because Fourier transform corresponding is infinite signals, signals after framing become limited, framing signal again after Fourier transform, the high frequency part will have leaked , so to add window. Window function spell spectrum are in a high frequency part of the globe, so each frame and window after Fourier transform, signal spectrum basic leak )