FDTD_2D

读取txt文本文件中的数据，然后自动画滞回曲线图！可以区分不同周期，用不同颜色描述！(Txt text file to read the data, then the hysteresis curve from the animation! Can distinguish between different periods, with different color descriptions! )

非常很好地用于股指期货动态对冲，用于股指期货动态对冲，用于股指期货动态对冲(Used for stock index futures dynamic hedge，Used for stock index futures dynamic hedge)

永磁同步电机滑膜变结构无速度传感器控制仿真 可以实现有速度传感器启动运行，和无速度传感器运行。 (Speed sensorless control of permanent magnet synchronous motor synovial variable structure simulation can implement a speed sensor is up and running, and speed sensorless operation. )

产生地震记录，利用了AVO，而且包含作图部分wigb(simulating seisdata，AVO，wigb)

本程序利用奇异值分解对3通道彩色图像进行压缩分解，具体步骤如下： 压缩过程： 1. 选取子图像大小K值，把图像分解成M×M个子图像，IMG(s),s=1,2,…, M2，其中M=N/K，原始图像IMG大小为N×N。 2. 计算这M2个子图像的平均值average，对每幅子图像减去均值图像得到新图像。 3. 计算相关矩阵R，其元素定义为 。 4. 计算R的特征值与特征向量，计算每幅子图像与最大特征向量的内积，便得到编码，即压缩后的图像。 (This procedure using singular value decomposition of 3-channel color image compression decomposition, concrete steps are as follows: compression process: 1. Select the sub-image size K value, the image is decomposed into M × M sub-image, IMG (s), s = 1, 2, ..., M2, in which M = N/K, the original image IMG size N × N. 2. M2 calculate the average of sub-image average, for each sub-image minus the new images mean images. 3. Calculation of correlation matrix R, defined as its elements. 4. Calculation of the characteristics of R value and eigenvector calculated each sub-image with the largest eigenvector of the inner product, they will have to code, that is, the compressed images.)

说明：  这个程序是一本美国的数值方法教材上提供的，程序清单如下(the procedure is a numerical method for the United States to provide the materials, procedures following list)

利用MIT心电数据库编写的检测ECG信号的程序(use MIT ECG database prepared by the ECG signal detection procedures)

共轭梯度法，MATLAB程序，计算方法作业，内有说明(Conjugate gradient method, MATLAB procedures, calculation methods work, there are instructions)

change matlab figure s icon,可以改变图的icon(change matlab figure s icon, can change the map icon)

IMT-DS FDD(WCDMA)系统无线接口层2技术规范： 媒质接入控制（MAC）协议 IMT-DS FDD(WCDMA) System Radio Interface Layer 2 Technical Specification: Media Access Control(MAC) Protocol (IMT-DS FDD (WCDMA) radio interface layer 2 system specifications: Medium Access Control (MAC) protocol IMT-DS FDD (WCDMA) System Radio Interface Layer 2 Technical Specification: Media Access Control (MAC) Protocol)