Surface_Contour_Plot

This is a code calculate variogram in Geostatistics. There are examples commended in the code

kalman一维滤波，采用两点差分法确定初始值，并仿真出不同初值情况下的估计效果(the fiter base on kalman)

应用于复杂网络分析时采用matlab代码的节点介数(Node betweenness complex network analysis)

说明：  K近邻算法（KNN）的matlab源代码，程序清晰易读(K neighbor algorithm (KNN) of matlab source code, and the program is clear and easy to read)

说明：  NPC三电平仿真, matlab仿真，2017版本(NPC 3level invrter simulation)

data compare,/* Get the tables from a database and run through each table to list the table */* name and field names

基于Matlab环境，对雷达信号，基于高斯模型的回波进行仿真。(Based on the Matlab environment, the radar signal, based on the Gauss model of echo simulation.)

颜色空间的转换应用matlab编写的程序 很好用的程序(color space change use matlab wirite it is a good program)

利用长除法，产生平衡GOLD序列码，扩频方面的内容(Using long division, resulting in a balance GOLD serial number, spread spectrum aspects)

Using TF-IDF to Determine Word Relevance in Document Queries : In this paper, we examine the results of applying Term Frequency Inverse Document Frequency (TF-IDF) to determine what words in a corpus of documents might be more favorable to use in a query. As the term implies, TF-IDF calculates values for each word in a document through an inverse proportion of the frequency of the word in a particular document to the percentage of documents the word appears in. Words with high TF-IDF numbers imply a strong relationship with the document they appear in, suggesting that if that word were to appear in a query, the document could be of interest to the user. We provide evidence that this simple algorithm efficiently categorizes relevant words that can enhance query retri