27-12-12

很有用的一些代码　对于新手很有用的　可以下来(Some useful code for the novice can be very useful down)

说明：  通过BP神经网络学习一个3维的函数的源代码，为加快速度，程序初始化的为已经经过学习的得到结点权值，如果预设为随机值，将重新学习。(BP neural network through a three-dimensional study of the function of the source code to speed up, the initialization procedure for the study has already been node weights, if limited to random value, re-learn.)

采用matlab程序，运行时读取截面尺寸及钢筋布置等，计算钢筋混凝土截面承载能力(Matlab program, read the section size and reinforcement layout runtime to calculate the bearing capacity of reinforced concrete section)

svm工具箱，可以很好进行分类，并附有实例，可以很直接的看出分类效果(svm toolbox, well classification, with examples, can direct that the classification results)

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

光纤光栅法布里—珀罗腔（FBG F-P）的matlab仿真程序。利用光纤光栅的矩阵传输特性。(Fiber Bragg Grating Fabry- Perot cavity (FBG FP) of matlab simulation program. Optical fiber grating transmission characteristics of the matrix.)

结合混沌搜索的进化算法，利用logistic混沌映射与进化算法的结合解决问题(Logistic chaotic improvements)

简单的matlab代码，用于实现窄带正弦干扰中的信号检测。(Detection for narrowband sinusoidal interference signal )

Encode/decode to ldpc-blockcode

C表示 n个城市的坐标，为n×2的矩阵 NC_max为最大迭代次数 m表示蚂蚁个数 Alpha 表征信息素重要程度的参数 Beta 表征启发式因子重要程度的参数 Rho 信息素蒸发系数 Q 信息素增加强度系数 R_best 各代最佳路线 L_best 各代最佳路线的长度(C indicated that the coordinates of n cities, in order to n × 2 matrix NC_max maximum number of iterations m, said the number of Alpha characterization of ant pheromones importance of the parameters of Beta characterization of the parameters of heuristic importance of Rho factor pheromone pheromone evaporation coefficient Q increase the strength factor R_best generations of the best route L_best the length of each generation of the best route)