contrast-adjust

傅 立叶变换是数字信号处理领域一种很重要的算法。要知道傅立叶变换算法的 意义，首先要了解傅立叶原理的意义。傅立叶原理表明：任何连续测量的时序或 信号，都 可以表示为不同频率的正弦波信号的无限叠加。而根据该原理创立的 傅立叶变换算法利用直接测量到的原始信号，以累加方式来计算该信号中不同正 弦波信号的频 率、振幅和相位。 (The goals for the course are to gain a facility with using the Fourier transform, both specific techniques and general principles, and learning to recognize when, why, and how it is used. Together with a great variety, the subject also has a great coherence, and the hope is students come to appreciate both. )

1.将BMP图像内容读入内存数组。 2. 调整图像的灰度，对图像进行灰度变换（反变换）。 3. 对图像进行较正,分别取值为0.4,0.6,0.8.(1. The BMP image content is read into memory array. 2 Adjust the gray image, the image gray-scale transformation (inverse transform). 3 more positive image, respectively, the value of 0.4,0.6,0.8.)

说明：  何振亚－现代谱估计【pdf影印】，何振亚－现代谱估计【pdf影印】 (Zhenya- Modern Spectral Estimation】 【pdf copy, Zhenya- Modern Spectral Estimation】 【pdf copy)

编写程序，分别读入两个语音文件,然后计算它们的短时自相关函数(Programming, respectively, read the two audio files, and then calculating their short-time auto-correlation function)

matlab 构造模型，可用于地质构造分析，非常好用！(Matlab tectonic model, and can be used in the analysis of geological structure, is very nice! )

包括matlab中一些常用的函数，还有一些特殊函数，如马库姆函数(marcum Q-function)

Welch法功率谱密度估计 改进的平均周期图法来求取随机信号功率谱密度估计的Welch法。(Welch method of power spectral density estimates to improve the average periodogram to strike a random signal power spectral density estimation method of Welch.)

Neural Network using a Generalized Linear Model

说明：  对新冠肺炎病例传播数据进行清洗，并进行可视化，包含流向地图和桑基图。(The novel coronavirus pneumonia transmission data were cleaned and visualized, including flow maps and sonkey maps.)

This book is for battery specification