sampledft

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(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 )

the pdf about expert system

说明：  使用matlab调用refprop，计算各种制冷剂工质的物性数据(refprop used in matlab)

语音增强的的MATLAB代码，给有需要的人，欢迎交流(Speech Enhancement of MATLAB code, there is need to give the people are welcome to communicate)

SMC for Boost Converter

一个神经网络PID控制例子 2C控制对象为一个直升机俯仰轴的角度控制 2C数学模型为二阶传递函数(PID control of a neural network control 2C an example of a helicopter for the angle of pitch-axis control 2C mathematical model for the second-order transfer function)

说明：  半监督机器学习semi-supervised Learning 国外经典教材(A classical intro to SSL)

数值方法（MATLAB版）第三版 英文 本书介绍了数值方法的理论和实践知识。以实际例题说明概念定理，含大量习题和编程题。(numerical methods (MATLAB version) English third edition of the book on the numerical method of theoretical and practical knowledge. Practical examples to clarify the concept theorem, with a large number of exercises and programming problems.)

这是一个测试gsvd.m函数的matlab代码(This is a test gsvd.m function Matlab code)

这是matlab的图像处理学习文件，自己花钱买来的资料，不是网上随便下载的。(This is a learning matlab image processing files, their own money to buy the information, not just downloaded online.)