Bases

用DFT近似计算连续时间周期信号的频谱，对matlab新手适用。(Approximate calculation using DFT spectrum of continuous-time periodic signal of matlab novice apply.)

耳蜗实质上相当于一个滤波器组，耳蜗的滤波作用是在对数频率尺度上进行的，在1000HZ下，人耳的感知能力与频率成线性关系；而在1000HZ以上，人耳的感知能力与频率不构成线性关系，而更偏向于对数关系，这就使得人耳对低频信号比高频信号更敏感。Mel频率的提出是为了方便人耳对不同频率语音的感知特性的研究。频率与Mel频率的转换公式为(Cochlear substantially equivalent to a filter set, cochlear filter is used on logarithm frequency scale, under the 1000 hz, the perception of the human ear and a linear relationship with frequency In more than 1000 hz, the perception of the human ear does not constitute a linear relationship with frequency, and prefer to logarithmic relationship, which makes the human ear is sensitive to low frequency signal is better than high frequency signal. Mel frequency is put forward in order to facilitate the ear of the study of speech perception characteristics of different frequency. For frequency and Mel frequency conversion formula )

ms sql queries. implemented simple queries request

本算法在实验室环境下录制语音，并加入matlab仿真软件产生的高斯噪声，成功实现了谱减法语音降噪(Record the voice of the algorithm in a laboratory environment, and added matlab simulation software generate Gaussian noise, the successful implementation of spectral subtraction speech noise reduction)

部分实现了追踪测速迭代松弛算法，有循环检测，周期性检测，处理信号的时频分析。( Partially achieved tracking speed iterative relaxation algorithm, There are cycle detection, periodic testing, When processing a signal frequency analysis.)

使用matlab调试C文件，mex相关操作。附带说明和源程序。(This code use matlab to debug the code which is writed by c.)

最小均方算法lms源程序，算法简单，实用，可准确无误的运行(Minimum mean-square source lms algorithm, the algorithm is simple, practical, accurate operation can be)

This toolbox has functions to perform nonlinear diffusion images. This kind of image filtering is particularly useful for reducing noise and to simplify images for further segmentation. Much of these functions are based on Perona and Malick s work, and also on J. Weickert s papers. The fast AOS diffusion is implemented. There is also 3D diffusion functions, color image diffusion and Coherence-Enhancing diffusion (This toolbox has functions to perform nonl inear diffusion images. This kind of image fi ltering is particularly useful for reducing no ise and to simplify images for further segmenta tion. Much of these functions are based on Peron a and Malick's work, and also on J. Weickert's papers. The hypothetical fast AOS fusion is implemented. There is also 3D diffusi on functions, color image diffusion and Coherence- enhancin g diffusion)

数学建模书上的答案，第三版的课后习题答案，希望你们可以下载查看。(Mathematical modeling books the answer to the third edition of after-school Exercise answers, I hope you can download and view.)

有借鉴意义哦，这个有中文注释，看得明白，计算晶粒的生长，入门级别程序。( There are reference Oh, The Chinese have a comment, understand it, Calculation of growth, entry-level program grain.)