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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：  支持上百种2D和3D图表风格，并提供40多个数学和统计函数、无限制的轴和22个调色板(provides more than 40 mathematical and statistical functions, unlimited axes and 22 palettes.)

分数阶Liu系统与分数阶统一系统中的混沌现象及二者的异结构同步-Fractional-order Liu system and the fractional order unified system of chaotic phenomena and the different structure of both synchronous

一款很不错的个人单页介绍主页，高端大气上档次(A very good personal page introducing home page, high-end atmospheric grade)

免注册cell表哥控件 可以任意合并拆分单元格等!-cell-free registration can be arbitrary control Cousin merger Resolution cells, etc.!

求解风光储和CHP热电机组电力系统最优潮流程序(Solving the optimal power flow of wind solar power system)

一款实用jQuery和css3制作的炫酷弹性背景轮播图插件。该jQuery轮播图在轮播的时候(A practical jQuery and CSS3 made a cool flexible background carousel plug-in. The jQuery Rotary Graph is in Rotary)

m序列的生成器，rake接受，简单易用，希望对大家有帮助-m sequence generator, rake acceptable, easy to use, everybody would like to have help. . .

说明：  LFM（线性调频信号）在matlab中的简单实现。(Simple implementation of LFM in MATLAB)

一个很不错的asp播放flv的源代码，欢迎下载-A very good player flv source code asp, welcome to download