JDBC-Tutorial

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：  该模型为含HVDC的3机9节点系统，可应用于配电网，潮流计算等等等方面(HVDC EMBEDDED IN 3 GENERAOR AND 9 BUS SYSTEM)

一个完成文件，贪吃蛇游戏，汇编语言版的，是本人学习汇编语言时做的。-a completed document, Snake games, the assembly language version, I am learning assembly language so.

一个简单的数据挖掘程序,有贝叶斯方法和bp算法,还有决策数的简单实现,(A simple data mining program, there are Bayesian methods and bp algorithm, and the simple implementation of decision numbers,)

说明：  滞后相关系数Sllcorrelation 可用于计算滞后/超前相关系数等(The lag correlation coefficient Sllcorrelation can be used to calculate the hysteresis/lead correlation coefficient, etc.)

Tab滑动门导航Flash版，用Flash模拟实现的网页滑动门导航，操作感觉和WEb上的JS版滑动门几乎一样，但Flash版本可方便加入更多的动画效果，这是JS不能比的哦，效果预览请参见截图吧。

JSP实现WEB版AJAX聊天功能,jsp和HTML结合实现聊天功能，在JSP页面中运用了Ajax技术，实现无刷新发送消息的功能，对学习Jsp Ajax方面的操作有帮助。

RSS的开源项目.很方便的解析和生成标准的RSS的XML文件.-RSS revenue item. Very convenient analytical and generate standard RSS XML file.

说明：  A simple example of picture slideshow playback, after opening, can automatically play drawable-hdpi directory img start picture, temporarily did not think of the application scenario of this example, friends in need can download and see for themselves.

说明：  很好的生产管理系统，值得借鉴，C#编写，MES系统(Good production management system, worthy of reference, MES system)