data-preprocessing-

K-nearest neighbors 搜索 聚类时经常使用的一种方法 国外网站转载( The following utilities are provided: - Nearest neighbor - K-Nearest neighbors - Radius Search They al supports N-dimensions and work on double, it is possible to choose if return the distances. Here is a time comparison with a vectrized m-code: N=1000000 number of reference points Nq=100 number of query points dim=3 dimension of points k=3 number of neighbor tic [idc,dist]=BruteSearchMex(p ,qp , k ,k) MEX toc tic [idc,dist]=knnsearch(qp,p,k) VECTORIZED M-CODE toc p=rand(N,dim) qp=rand(Nq,dim) Output: Elapsed time is 0.962640 seconds. Elapsed time is 18.813100 seconds. )

1 录入一段语音，对其进行时域频域处理，通过变频、变速达到变声目的，且使处理后的语音信号不影响正常收听与理解。 2 用图形用户界面（GUI）对上述变声前变声后进行时域频域图形输出，不同的频率、速度有不同的输出，且对前后波形进行比较 (1 entry a voice, the frequency domain and time domain by frequency conversion variable speed, processing to make the treatment and voice purpose, after the speech signal shall not affect the normal to listen to and understand. 2 with the graphical user interface (GUI) voice of the above voice before after the frequency domain in the time domain graphics output, different frequency, speed have different output, and compared before and after waveform )

HOWMEWORK LET S DO IT TOGETHER . ffT MATLAB CODE

声纳技术实验常用水声信号及其处理方法，包括CW信号产生，LMF信号产生(Sonar technology experiments commonly used in underwater acoustic signal processing methods, including the CW signal generator, Model LMF signal generator)

微分方程求解，利用matlab软件，解决微分方程领域各种问题(Solving differential equations using matlab software, field problems to solve differential equations)

The simulink model of Back propagation Algorithm using an Adaptative Filter.

模式识别的重要工具箱，共同学习公共进步。(Pattern recognition toolbox, useful for all of us hope!)

sd program in spi interface .. you can connect a sd memmory using spi interface

this matlab code is useful for ranging applications where localization done using maximumum likelihood algorithm.

关于matlab软件的功能介绍,实用，方便，从基础入门，一切从零开始！！(something about Matlab)