Untitled1

说明：  有关单摆微分方程的Poincare截面及其matlab程序(Poincare section on differential equations and the pendulum matlab program)

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

Epitomic analysis of appearance and shape

数字移动:图中的九个点上,空出中间的点,其余的点上任意填入数字1到8.1的位置固定不动,然后移动其余的数字,使1到8顺时针从小到大排列.移动的规律是:只能将数字沿线移向空白的点. (Digital Mobile: Figure in the nine points, empty out the middle point, the rest of the points fill any position of the numbers 1 to 8.1 fixed and then move the rest of the figures, and make 1-8 clockwise from small to large array . The law of movement is: can only move along the number of blank spots.)

用于产生指定大小NxN的块，含有edge的信息，可以指定edge的方向。(Generate a directional block with certain edge.)

matlab编写的16QAM的调制解调程序，可以通过修改得到32QAM和64QAM的调制解调程序(matlab prepared 16QAM modulation demodulation process can be by modifying the 32QAM and 64QAM modulation and demodulation procedures)

说明：  Matlab语言在数字语音处理上的应用。(Matlab language in the digital voice processing applications.)

机械设计Matlab实现,如连杆机构的结构设计，槽轮机构的机构设计(Mechanical design and Matlab implementation, such as the linkage structure of grooved wheel mechanism design, mechanism design)

数学建模中的一种评价算法--基于topsis熵权评价法和改进的灰色预测模型代码，里面的内容根据自己的情况改。(An evaluation algorithm in mathematical modeling is based on the TOPSIS entropy weight evaluation method and improved grey prediction model code, and the contents are changed according to their own situation.)

wave guide on diferent imax