AQWALISread (2)

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：  通过51单片机+GPS模块测算汽车的运行速度，从而计算汽车的尾气排放量。(The running speed of automobile is measured by 51 single chip computer and GPS module, and the exhaust emission of automobile is calculated.)

说明：  An-efficient-resource-allocation-algorithm-for-OFDMbased-NOMA-in-5G-systems

说明：  计算单转子多阶模态以及各阶临界转速，以及不平衡响应，应用有限元法进行求解(the multi-stage modes, critical speeds and unbalanced responses of a single rotor are calculated by the finite element method)

ECSHOP multi interface payment plugin is installed, you can have ECSHOP programs: online banking, credit cards, bank cards, Alipay, WeChat and many other payment interface, ECSHOP program to achieve PC and WAP mobile phone payment scan code payment etc.. This plugin is provided by the "cloud payment".

TQ210开发板串口裸机下载程序，方便调试裸机程序(TQ210 Uart DownLoad)

利用产生式推理识别若干动物，动物种类有：虎，豹，长颈鹿等-use production identification number reasoning animal, a species : the tiger, leopard, giraffe, etc.

华容道游戏，大家一定都玩过，这个介绍源代码可以提高您的c#的能力(Huarong game, we must have played this introductory source code can improve your c#)

说明：  SLIC算法是simple linear iterative cluster的简称，该算法用来生成超像素（superpixel） 算法步骤： 已知一副图像大小M*N,可以从RGB空间转换为LAB空间，LAB颜色空间表现的颜色更全面 假如预定义参数K，K为预生成的超像素数量，即预计将M*N大小的图像(像素数目即为M*N)分隔为K个超像素块，每个超像素块范围大小包含[（M*N）/K]个像素 假设每个超像素区域长和宽都均匀分布的话，那么每个超像素块的长和宽均可定义为S，S=sqrt(M*N/K) 遍历操作，将每个像素块的中心点的坐标(x,y)及其lab的值保存起来，加入到事先定义好的集合中(Algorithmic steps: Given the size of an image M*N, it can be converted from RGB space to LAB space, and the color space of LAB is more comprehensive. If the predefined parameter K, K is the number of pre-generated super-pixels, i.e., the image of M*N size (the number of pixels is M*N) is expected to be divided into K super-pixel blocks, each of which contains [(M*N)/K] pixels. Assuming that the length and width of each super-pixel region are evenly distributed, the length and width of each super-pixel block can be defined as S, S = sqrt (M*N/K). The traversal operation saves the coordinates (x, y) and lab values of the central points of each pixel block and adds them to a pre-defined set.)

基本图形的绘制的C程序-basic graphics rendering the C program