分布式的PCA

医院选址问题1. 问题描述n个村庄之间的交通图可以用有向网图来表示，图中边上的权值表示从村庄i到村庄j的道路长度。现在要从这n个村庄中选择一个村庄新建一所医院，问这所医院应建在哪个村庄，才能使所有的村庄离医院都比较近？2. 基本要求(1) 建立模型，设计存储结构；(2) 设计算法完成问题求解；(3) 分析算法的时间复杂度。3. 设计思想医院选址问题实际是求有向图中心点的问题。首先定义顶点的偏心度。设图G=（V，E），对任一顶点k，称E(k)=max{d(i, k)}（i∈V）为顶点k的偏心度。显然，偏心度最小的顶点即为图G的中心点。如图7(a)所示是一个带权

本程序为非负矩阵分解，适用于高光谱解混。图形图像处理方面的 matlab程序

matlab statistics toolbox，解压到toolbox路径下，addpath即可使用

【实例简介】非下采样剪切波变换（NSST）是对剪切波（shearlet）变换的改进，在继承剪切波（shearlet）变换优点的同时，避免了伪吉布斯现象的出现，相比于小波变换、曲边变换等操作效率高、复杂度低。该源代码中包含测试实例和代码注释。

采用多路动态规划算法实现的双目立体匹配，采用了8个方向，针对PC进行了优化，多线程实现，可以得到精确的视差图像

《电磁场与电磁波》理论是信息技术的理论基础,是通信工程、电子信息工程、信息工程等专业本科学生必须具备的知识结构的重要组成部分之一。本教程主要讲述电磁场与电磁波的基本理论及其应用，内容安排经过精心设计，丰富全面，覆盖了静态场、时变场的基本理论和实际应用，其中重点是静态场的定理定律与应用、时变场的特性规律、传输介质中的电磁波特性、电磁辐射原理及其应用等，教学设计以读者为主体，符合课程的内在逻辑体系和学生的认知规律。 本教程页面风格统一，界面友好，采用文字、图像、动画、配音等多种表现形式，并利用层次说明、目录导航、前后翻页、热字超链、快速检索、演示控制等导航方式，帮助学生把握正确的学习方向，奠定良好

频谱仪的介绍、操作及性能指标，硬件工程师必须学会的测量器件之一。Definitions and conditionsSpecifications describe the performance of parameters covered by the productwarranty and apply to the full temperature of 0 to 55C, unless otherwisenotedGet more Information95th percentile values indicate the breadth of the population (approx. 2 o) of perfor-This EXA signalanalyzer datamance tolerances expected to be met in 95 percent of the cases with a 95 percentsheet is a summary of theconfidence, for any ambient temperature in the range of 20 to 30C. In addition tothe statistical observations of a sample of instruments, these values include thespecifications and conditionseffects of the uncertainties of external calibration references these values are notfor N9010A EXA and N9010AEPwarranted. These values are updated occasionally if a significant change in theExpress EXA signal analyzers.statistically observed behavior of production instruments is observedwhich are available in the EXASignalAnalyzer SpecificationTypical describes additional product performance information that is not covered byGuide(N9010-90025)the product warranty It is performance beyond specifications that 80 percent of theunits exhibit with a 95 percent confidence level over the temperature range 20 toFor ordering informationkrefer30C. Typical performance does not include measurement uncertaintyto the EXA Signal AnalyzerConfiguration GuideNominal values indicate expected performance, or describe product performance59896531Nthat is useful in the application of the product, but are not covered by the productwarrantyThe analyzer will meet its specifications whenIt is within its calibration cycleUnder auto couple control, except when Auto Sweep Time rules= AccySignal frequencies 10 MHZ, with DC coupling appliedThe analyzer has been stored at an ambient temperature within the allowedoperating range for at least two hours before being turned on; if it had previouslybeen stored at a temperature range inside the allowed storage range, but outsidethe allowed operating rangeThe analyzer has been turned on at least 30 minutes with auto align set tonormal, or, if Auto align is set to off or partial, alignments must have been runrecently enough to prevent an Alert message; if the Alert condition is changedfrom Time and Temperature to one of the disabled duration choices, the analyzermay fail to meet specifications without informing the userFor the complete specifications guide, visitwww.agilent.com/find/exaspecifications1. For earlier instruments/Serial number prefix MY/SG/US5052), the full temperature rangesfrom5t50°CFrequency and Time specificationsFrequency rangeDC coupledAC coupledOption 50310 Hz to 3.6 Gh10 MHz to 3. 6 GHzOption 50710 Hz to 7 GH10 MHz to 7 GHzOption 51310 Hz to 13.6 GHz10 MHz to 13.6 ghzOption 52610 Hz to 26.5 GH10 MHz to 26.5 GhzOption 53210 Hz to 32 gHzNAOption 54410 Hz to 44 gHzNABandLO multiple(N)10 Hz to 3. 6 GHz3.5to7.0GH3.5to8.4GH28.4 to 13.6 GHz3135to17.1GH17 to 26.5 GHz5426.4 to 34.5 ghz344t044GHzFrequency referenceAccuracy+l time since last adjustment x aging rate)+ temperature stability t calibrationaccuracyAging rateOption pFrStandardy±1×106/year±15X107/2 yearsTemperature stabilityOption PFrStandard20to30°c±15×108±2×106Full temperature range±5x1±2×10Achievable initial calibration accuracyOption PFrStandard±4x108±1410Example trequency reterence accuracy=±(1×107+5×103+4×10-)(with Option PFR1 year after last adjustment±19x10Residual fmOption pFr

关于室内可见光通信的仿真，利用Led作为照明光源和信号源，同时承担照明和通信两方面的作用，进行了通信性能的分析。

本人在学习qt时收集来的小项目，包括qt 2048小游戏，音乐播放器，扫雷游戏，贪吃蛇，计算器等，亲测可用。能帮助新手快速熟悉qt GUI编程。

ceemd分解，还是很不错的，先将数据精心ceemd分解，得到imf分量，然后通过相关系数帅选分量，在求出他们的样本熵的特征，完美运行，你值得拥有，可以的话，给一个好评，谢谢。