_sfprj

信号从发送者传送到接收者往往受到几种形式的变形而消弱，维纳滤波是一种从接收的原始信号中恢复信号的方法。(signal transmitted from the sender to the receiver is often some form of the deformation and weaken. Wiener filter is a reception from the restoration of the original signal signal method.)

This is a article about approximate entropy. It will be helpful for motor behavior and rehabilitation study.

阶跃信号与正弦信号调制，在同一张图纸上绘制四个子图。这是一个很基础的编程应用。(Step signal with a sinusoidal signal modulation, drawn with a drawing on four subgraphs. This is a very basic programming application.)

cluster validity measure and its applicatio

NP是美国匹兹堡大学的T.L.Saaty 教授于1996年提出了一种适应非独立的递阶层次结构的决策方法，它是在网络分析法（AHP）基础上发展而形成的一种新的实用决策方法。其关键步骤有以下几个： 1 确定因素，并建立网络层和控制层模型。 2 创建比较矩阵。 3 按照指标类型针对每列进行规范化。 4 求出每个比较矩阵的最大特征值和对应的特征向量。 5 一致性检验。如果不满足，则调整相应的比较矩阵中的元素。 6 将各个特征向量单位化(归一化)，组成判断矩阵。 7 将控制层的判断矩阵和网络层的判断矩阵相乘，得到加权超矩阵。 8 将加权超矩阵单位化(归一化)，求其K次幂收敛时的矩阵。其中第j列就是网络层中各元素对于元素j的极限排序向量。 (NP is a professor at the University of Pittsburgh TLSaaty presented in 1996, an adaptation of non-independent Hierarchy of decision-making method, which is the analytic network process (AHP) formed on the basis of the development of a new and practical decision-making method . The key steps are the following: A determining factor, and a network layer and control layer model. 2 create a comparison matrix. For each of the three types of indicators in accordance with normalized columns. 4 find the maximum for each comparison matrix eigenvalue and the corresponding eigenvectors. 5 consistency test. If not satisfied, then the comparison to adjust the corresponding matrix elements. 6 will each feature vector units of (normalized), to determine the composition of matrix. 7 to determine the control layer and network layer to determine matrix matrix multiplication, to be weighted super-matrix. 8 of the weighted super-matrix units of (normalized), seeking the powe)

a routine for Gaussian elimination together w/ gepivot.m which you will need for running

利用Djikstra算法计算最短路，输入的参数为一个矩阵，可以是无向图或者有向图(calculate the shortest distance)

该matlab程序可以通过网络爬虫抓取网页内容（本程序抓取的是新浪金融的，可以修改成其他的）(The matlab program can crawl web content through web crawlers (the Program crawl Sina finance can be modified into the other))

说明：  用于检测微弱信号的Duffing系统，这是我的毕业设计一部分，因为我做的时候也曾求取过很多资料，但是并没有找到，因此在我完成之后，上传这个代码，希望这个能帮助别人。 里面还有后续做的GUI界面实现的Duffing振子检测功能，可检测信号幅值和频率。(The Duffing system for detecting weak signals, this is part of my graduation project, because I also asked for a lot of information when I did it, but it was not found, so after I finished, upload this code, I hope this can help others.)

说明：  此粒子滤波程序采用重采样算法，用于二维平面目标跟踪(This procedure uses resampling particle filter algorithms for two-dimensional plane tracking)