main_yuyinfenjie

说明：  Multirate滤波器设计。模拟带通信号频率范围1KHz—1.1KHz，设计一个采样频率8KHz数字频谱分析系统，要求频率分辨率0.1Hz。(Multirate filter design. Analog bandpass signal frequency range 1KHz-1.1KHz, design a sampling frequency of 8KHz digital spectrum analysis system, required frequency resolution of 0.1Hz.)

在理想情况下，假设匀速直线行驶，一直杆臂长度，求杆臂速度。(In the ideal case, assuming uniform linear driving, always arm length, and the lever arm speed.)

RBF配点求解微分方程是一类新方法，程序给出了RBF（采用的径向基函数是MQ函数）求解一维微分方程实例。(RBF (Multi-quadric function) method to solve the one dimentional differential equation.)

相场方法模拟均匀过冷度场下的金属晶体结晶过程(PHASE-FIELD METHOD FOR THE METAL SOLIDIFICATION )

image processing matlab 2

说明：  利用主成分分析法结合粒子群（PSO）优化极限学习机(ELM)进行工程费用估计预测(In this paper, principal component analysis (PCA) combined with particle swarm optimization (PSO) optimization extreme learning machine (ELM) is used to estimate and forecast engineering cost)

Stretches contrast on the image and normalize image from 0 to 1. The main difference of this function to the standard stretching functions is that standard function finds global minimum and maximum on the image, then uses some low and high threshold values to normalize image (values below LowTHR are equated to LowTHR and values above HighTHR are equated to HighTHR)

本源代码首先实现普通的直方图均衡化，再实现灰度级之间的均匀分布，可以有效的解决直方图均衡化过程中的灰度断层现象。使得图像更加的柔和，直方图分布更均匀。(Source code first to achieve common histogram equalization, and then to achieve uniform distribution between gray levels can be an effective solution in the process of histogram equalization, gray fault phenomenon. Makes the image more of the soft histogram more evenly distributed.)

该程序用数值方法计算rayleigh-lamb波频散方程，得到频散曲线(the program is used to sovle the rayleigh-lamb equation by mumerical method,and the dispersion curve was plot)

信号发生器的编程程序，程序是我的同学编写的，希望对你有所帮助(Signal generator programming program, the program is written in my classmates, I hope for your help)