FLch3ELSeg4

对CIC滤波器的详明解释，对正在学习的人会有很大帮助(Full and clear explanation of the CIC filter, the people who are learning to be a great help)

由设计要求可知，wp<=0.2π，允许误差幅度小于1dB，ws>=0.3π内衰减应大于15dB。为了验证数字滤波器的实际滤波功能，设计程序时，把输入序列定为验证函数x（t）=4sin（100πt）以及x（t）=4sin（200πt）和x（t）=4sin（400πt）。又因为Ts=1.25ms，T=80ms，故采样点为64，即N=64，所以当M=6，可以同时调试并验证程序的滤波功能。(Seen by the design requirements, wp < = 0.2π, allow a margin of error of less than 1dB, ws> = 0.3π within attenuation greater than 15dB. In order to verify the actual filtering function of the digital filter design program, the input sequence as validation function x (t) = 4sin (100πt) and x (t) = 4sin (200πt) and x (t) = 4sin (400πt) . And because Ts = 1.25ms, T = 80ms, so the sampling points is 64, that is N = 64, so when M = 6, can debug and validate filtering program.)

此程序利用“弦高法”控制得到曲线上若干点，然后推广到三维曲面上布点，可以按照曲面曲率变化得到点的布局，最终三维图上显示出来(This procedure using the chord method control curve of some points, and then extended to 3D surface distribution, can be in accordance with the change of surface curvature point layout, the final three dimensional graph display)

维Logistic映射 x(n+1)=μx(n)(1-x(n)) 在3. 57 <μ < 4 的参数区域内,系统存在混沌吸引子 (Dimensional Logistic map x (n+1) = μx (n) (1-x (n)) in 3. 57 < μ < 4 parameters in the region, the systems Chaotic attractor)

Wavelet Theory and Applications A literature study

bang zhu chu xue zhe dui jian dan de matlab cheng xu xue xi

数学实验中的最速落径问题 A,B是不在一条铅垂线上的两点，在链接A,B两点的所有光滑曲线中，找出一条曲线，使得初速度为零的质点，在重力的作用下，自A点下滑到B点所需的时间最短 (Mathematical experiment steepest drop Path problems A, B is not a vertical line of two points, the link A, B two points in all the smooth curve, to find a curve, the initial velocity of the particle is zero, gravity role, and since the point A to B points decline in the time required for the shortest)

CFD analysis of velocity in x-direction

说明：  多目标函数，在多个约束条件的情况下用遗传算法找出最优解(Multi-objective function, using genetic algorithms to find the optimal solution under multiple constraints)

该matlab代码描述了谱减的语音增强算法(The matlab code spectrum is described by the speech enhancement algorithm)