data

Perhaps because no important information is represented in absolute brightness values in the visual environment, the visual system has confined its processing almost exclusively to differences – spatial and temporal contrasts. Recording from neurons along the visual pathways shows that the cells have structured receptive fields – defined angular positions in the visual field where they respond to the stimulation.

航班订票系统，包含订票、退票等功能，航班信息储存在航班.txt文件中(Flight booking system, including booking, refund and other functions)

说明：  利用AUTOLISP进行CAD二次开发，里面画了盘式法兰的两个视图，适合新手(Using AUTOLISP to redevelop CAD, two views of disc flange are drawn, which is suitable for beginners.)

针对基于双曲线定位的DV-Hop算法中误差项的异方差性引起的定位误差大的问题，提出了一种基于加权双曲线定位的DV-Hop改进算法。算法分析了基于双曲线定位的DV-Hop算法模型中误差项的异方差性，用加权最小二乘法对异方差性进行纠正，对加权最小二乘法中的权值矩阵进行了推导并得到与跳数相关的最佳权值矩阵，使得误差项满足同方差性，所得估计值更加接近最佳线性无偏估计。仿真实验结果表明，所提算法在节点定位精度上较现有的基于双曲线定位的DV-Hop算法都有一定提高。(Aiming at the problem that the heteroscedasticity of observation errors leads to low locating accuracy in DV-Hop algorithm based on hyperbolic positioning, this paper proposes an improved DV-Hop algorithm which based on weighted hyperbolic positioning. The algorithm analysis the heteroscedasticity of the error term in the model and takes advantage of weighted least square method which corrects heteroscedasticity straightforwardly. Then, the weight matrix related to least hops between nodes is deduced, the estimators thus obtained are more close to the best linear unbiased estimator. The simulation results show that the location performance of the improved algorithm is better than that of the exsiting DV-Hop algorithm which based on hyperbolic positioning.)

说明：  基于PSO_FCM的遗传算法的聚类实现，对各种样本数据进行聚类划分(Clustering implementation of genetic algorithm based on PSO FCM clustering and dividing various sample data)

说明：  最大熵多阈值分割函数，可以直接使用，传入一个阈值数组即可完成分割(entropy max function)

说明：  ISAR雷达实验报告，包括基本原理和部分matlab代码(ISAR radar experiment report, including basic principles and some matlab code)

包含最短路径算法，用户均衡交通流分配，以及包含大型测试网络(Contains the shortest path algorithm, user equilibrium traffic flow assignment, and contains large test networks)

Python编程从零基础到项目实战-PPT(python power point teaching)

说明：  MatlabGUI转EXE(合订)文档(MATLAB GUI to EXE Document)