FDTD_PML_009876

建立了基于matlab的整流器仿真模型，系统运行正常，可在此基础上进行模糊的仿真(Rectifier is established based on matlab simulation model, the system runs properly, this can be simulated on the basis of vague)

用基本小波97进行变换wavecdf97(x=imread)(the basic wavelet transform wavecdf97 97 (x = imread))

镜像经验模态分解，可以实现信号的分析与分解，也可以做时频图(Mirroring the empirical mode decomposition, analysis and decomposition of the signal can be achieved, but also can do the time-frequency diagram)

EMD algorithm..used in speech processing, breaks trhe signal upto fundamental levels

输入220伏输出400伏的升压型平均电流控制的有缘功率因数校正(nput 220 volts 400 volts boost output current control destined average power factor correction)

Current controller for inverter

说明：  此程序为语音信号的过零率检测，白噪声过零率远远高于语音信号，故可通过对过零率的检测判断出是不是语音信号。(This procedure for the zero rate of speech signal detection, white noise zero crossing rate is much higher than the speech signal, it can zero rate by detection of voice signal is not judged.)

NUMERICAL DIFFERENCE APPROXIMATION based on Taylor s expansion---the program give the finite difference coefficient for any number of discrete point. also with that u can differentiate of any function in any order with high accuracy. also u can use it to develop a general finite difference program.

finite difference scheme for simple harmonic oscillator

60个matlab的学习代码，对初学者帮助很大的~~~(60 codes of matlab programing )