SpeakRECOG

This will solve 2d photonic crystal modes by plane wave method

matlab函数速查,各种函数都可以查到，有拼音检索，还有类别检索(Quick matlab function, various functions can be found, there is phonetic search, as well as Category Search)

Wavelet denoising For using this code need to use signal toolbox and general toolbox in your matlab In the first part of this assignment, we asked to obtain a (black-and-white) digital image of size 512 by 512 and then generate noisy image by adding a Gaussian noise but under the condition of having SNR=20dB by select the suitable value of variance for Gaussian noise formula. Second step is performing wavelet denoising using the hard thresholding (Use the db 6 for four levels) in the condition of finding the optimal thresholding value of T in terms of the SNR obtained. It means that, we should find the highest SNR value by finding the suitable value for threshold. Then we asked to do the same process but this time using soft thresholding. Finally for the last part of question one, we should compare the results of the obtained SNR with the recommendations of 3*sigma for the hard thresholding and 3/2*sigma for the soft thresholding.

某火箭在空中沿直线做匀加速飞行，加速度为 ，发动机推力的波动一定会引起加速度波动，雷达以间隔时间不断测量该火箭距离远点的距离 ，由于雷达的测量噪声使得火箭距离测量值 中含有噪声。现在欲通过雷达对火箭距离的测量数据求得火箭的真实距离、速度和加速度。(A linear constant acceleration rocket flight in the air along the acceleration, the engine thrust fluctuation will cause the fluctuation of acceleration time interval measurement, radar to constantly the rocket from the far point of the distance, because the noise radar makes the rocket range measurements with noise. Now, the real distance, velocity and acceleration of the rocket are obtained by measuring the distance of the rocket by radar.)

说明：  GM（1，1）模型程序 可用于一般时间序列预测(GM (1,1) model program can be used for general time series prediction)

光通过三菱镜动态仿真，matlab程序，学习光学仿真必看的代码(Mitsubishi mirror light through dynamic simulation, matlab program, learning the optical simulation must-see code)

实现单稳触发功能，扩展输入信号为指定时常(a implement of mono，expand the input signal to a given time)

张小飞《阵列信号处理与应用》所附matlab程序(Zhang Xiaofei " array signal processing and applications" annexed matlab program)

说明：  对地震计录进行fk滤波，适用于初学者，可以下载学习(fk filter,FK filtering for seismometer recording is suitable for beginners and can be downloaded for learning)

源于Fortran编写，用于学生信息数据库操作，如查找，排序，插入，删除等(Prepared from Fortran for student information database operations, such as search, sort, insert, delete, etc.)