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2018年中国统计年鉴
2018年中国统计年鉴（Excel版）每年年鉴均在一张excel中，可直接批量复制、粘贴与操作，避免了每次找不同表格的数据都需要打开一个excel的繁琐，希望能够帮助到大家。
- 2020-06-23下载
- 积分：1
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小波变换用于图像压缩的MATLAB源程序
小波变换在图像压缩中的应用，用MATLAB实现时因为MATLAB自带小波分析工具箱，所以编程比较简便，主要是算法要理解。这里附上了4个程序代码，1是局部压缩，2、3是两个压缩实例（EZW算法，让部分高频系数置零），4是阈值确定实例。载入图像时MATLAB软件自带的，因此不需要转换图像格式等语句。另外，一些函数的不理解的，可以查看help看函数的意义。因为实验结果上传起来比较费时，所以只给了源文件。仅供学习参考。希望能起到帮助作用
- 2020-12-06下载
- 积分：1
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5G Mobile and Wireless Communications Technology
关于5G通信和无线传输的相关知识5G Mobile and wirelessCommunications TechnologyEDITED BYAFIF OSSEIRANEricssonJOSE F MONSERRATUniversitat politecnica de valenciaPATRICK MARSCHCAMBRIDGEUNIVERSITY PRESSCAMBRIDGEUNIVERSITY PRESSUniversity Printing House, Cambridge CB2 8BS, United KingdomCambridge University Press is part of the University of CambridgeIt furthers the Universitys mission by disseminating knowledge in the pursuit ofeducation learning and research at the highest international levels of excellencewww.cambridge.orgInformationonthistitlewww.cambridge.org/9781107130098C Cambridge University Press 2016This publication is in copyright. Subject to statutory exceptionand to the provisions of relevant collective licensing agreementsno reproduction of any part may take place without the writtenpermission of Cambridge University PressFirst published 2016Printed in the United Kingdom by TJ International Ltd. Padstow Cornwalla catalogue record for this publication is available from the british libraryLibrary of Congress Cataloguing in Publication dataOsseiran. Afif editor5G mobile and wireless communications technology /[edited by] Afif Osseiran, EricssonJose F monserrat, Polytechnic University of Valencia, Patrick Marsch, Nokia NetworksNew York: Cambridge University Press, 2016LCCN2015045732|ISBN978110713009( hardback)LCSH: Global system for mobile communications. Mobile communication systems- StandardsLCC TK5103483A152016DDC62138456dc23Lcrecordavailableathttp://icCn.loc.gov/2015045732IsBN 978-1-107-13009-8 HardbackCambridge University Press has no responsibility for the persistence or accuracy ofURLS for external or third- party internet websites referred to in this publicationand does not guarantee that any content on such websites is, or will remainaccurate or appropriateTo my new born son S, my twin sons H& N, my wife L s-y for her unwaveringencouragement, and in the memory of a great lady my aunt K eA OsseiranTo my son, the proud fifth generation of the name Jose Monserrat. And with thewarmest love to my daughter and wife, for being always there.E MonserratTo my two small sons for their continuous energetic entertainment, and my dearwife for her amazing patience and support.P MarschContentsList of contributorspage xIvForewordAcknowledgmentsXIXAcronymsXXIIIntroduction1. 1 Historical background1.1.1 Industrial and technological revolution: from steam enginesto the internet1. 1.2 Mobile communications generations: from IG to 4G1.1.3 From mobile broadband ( mbb) to extreme MBB1. 1.4 IoT: relation to 5G1.2 From ICT to the whole economy6771.3 Rationale of 5G: high data volume, twenty-five billion connecteddevices and wide requirements1.3.1 Security1.4 Global initiatives1. 4.1 METIS and the 5G-PPP1. 4.2 China: 5G promotion group2241. 4.3 Korea: 5G Forum141. 4.4 Japan: ARIB 2020 and Beyond Ad Hoc1. 4.5 Other 5G initiatives14.6 Iot activities1.5 Standardization activities445551.5.1ITU-R1.5.23GPP161.5.3 EEE161.6 Scope of the book16References185G use cases and system concept212. 1 Use cases and requirements212.1.1 Use cases212. 1.2 Requirements and key performance indicatorsContents2.2 5G system concept322.2.1 Concept overview322. 2.2 Extreme mobile broadband342.2.3 Massive machine-type communication362.2.4 Ultra-reliable machine-type communication382.2.5 Dynamic radio access network392.2.6 Lean system control plane432. 2. 7 Localized contents and traffic flows52.2.8 Spectrum toolbox2. 3 Conclusions48References48The 5g architecture503.1 Introduction503.1.1 NFV and SDN503.1.2 Basics about ran architecture533.2 High-level requirements for the 5G architecture563.3 Functional architecture and 5g flexibility573.3.1 Functional split criteria583.3.2 Functional split alternatives593.3.3 Functional optimization for specific applications3.3.4 Integration of lte and new air interface to fulfill 5Grequirements3.3.5 Enhanced Multi-RAT coordination features663. 4 Physical architecture and 5G deployment3.4.1 Deployment enablers673.4.2 Flexible function placement in 5G deployments713.5 Conclusions74References75Machine-type communications774.1 Introduction774.1.1 Use cases and categorization of mto774.1.2 MTC requirements804.2 Fundamental techniques for MTC834.2.1 Data and control for short packets834.2.2 Non-orthogonal access protocols854.3 Massive mtc864.3.1 Design principles864.3.2 Technology components864.3. 3 Summary of mMTC features944.4 Ultra-reliable low-latency MTC944.4. 1 Design principles944.4.2 Technology componentsContents4.4.3 Summary of uMTC features1014.5 Conclusions102References103Device-to-device(D2D)communications1075.1 D2D: from 4G to 5G1075.1.1 D2D standardization: 4G LTE D2D1095.1. 2 D2D in 5G: research challenges1125.2 Radio resource management for mobile broadband D2D1135.2.1 RRM techniques for mobile broadband d2d5.2.2 RRM and system design for D2D1145.2.3 5G D2D RRM concept: an example5.3 Multi-hop d2d communications for proximity and emergencyservices1205.3.1 National security and public safety requirements in 3GPPand Metis1215.3.2 Device discovery without and with network assistance125.3.3 Network-assisted multi-hop d2d communications1225.3.4 Radio resource management for multi-hop D2D1245.3.5 Performance of D2D communications in the proximitcommunications scenario1255. 4 Multi-operator d2d communication1275.4.1 Multi-operator D2D discovery275.4.2 Mode selection for multi-operator D2D1285.4.3 Spectrum allocation for multi-operator D2D295.5 Conclusions133References1346Millimeter wave communications1376. 1 Spectrum and regulations1376.2 Channel propagation1396.3 Hardware technologies for mm W systems1396.3.1 Device technology1396.3.2 Antennas1426.3.3 Beamforming architecture1436.4 Deployment scenarios6. 5 Architecture and mobility1466.5.1 Dual connectivit1476.5.2 Mobility1476.6 Beamforming1496.6. 1 Beamforming techniques1496.6.2 Beam finding1506.7 Physical layer techniques1526.7.1 Duplex scheme152
- 2020-12-06下载
- 积分：1
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车联网V2X资料
车联网V2X各类资料。
- 2020-12-09下载
- 积分：1
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最经典MOS管电路工作原理及详解没有之一
MOS管电路工作原理。详解介绍PMOS、NMOS的开关条件，MOS管的工作原理。具体电路用哪种MOS管更合理电路符号再来一个,试试看:PQ63哪个脚是(源极)?SI4825DDY-T1哪个脚是D(漏极)?8765G(栅极)昵?是P沟道还是N沟道MOS?依据是什么?如果接入电路,D极和S极,哪一个该接输入,哪个接输出?这次怎么样?电路符号1三个极怎么判定?MOS管符号上的三个脚的辨认要抓住关键地方。S极G极,不用说比较好认S极,G极不论是P沟道还是N沟道,两根线相交的就是;D极,D极不论是P沟道还是N沟道,是单独引线的那边。电路符号2他们是N沟道还是P沟道?三个脚的极性判断完后,接下就该判断是P沟道还是N沟道了S极N沟道 MOSFETG极箭头指向G极的是N沟道D极电路符号S极P沟道 MOSFETG极箭头背向G极的是P沟道D极当然也可以先判断沟道类型,再判断三个脚极性电路符号小测试:先判断是什么沟道,再判断三个脚极性G极2S极D极D极S极323G极P沟道 MOSFETN沟道 MOSFET电路符号3寄生二极管的方向如何判定?接下来,是寄生二极管的方向判断:s极寄生二极管S极G极N沟道G极P沟道D极D极它的判断规则就是:N沟道,由S极指向D极P沟道,由D极指向S极。电路符号S极上面方法不太好记,G极N沟道一个简单的识别方法是:(想像DS边的三节断续线是连通的)D极不论N沟道还是P沟道MoS管,S极中间衬底籥头方向和寄生二极管的箭头方向总是一致的:要么都由S指向D,要么都由D指向S。G极P沟道D极电路符号4它能干吗用呢?5VPCU+VCORE在我们天天面对的笔记本主板上,MOS管有两大作用:此处电压PR79 2被拉低100KF4PR78开关作用(1)228PQ27控制脚为低电平5VOV VRONL截止列导通2N7002EPQ27ME2N7002E
- 2020-12-11下载
- 积分：1
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CEEMD分解-imf分量相关系数-信息熵特征
这是一个样本的实验，现将振动信号进行CEEMD分解，得到imf分量，在求imf分量的相关系数啦筛选分量，并求一个样本的信息熵特征，构造一个特征向量矩阵，然后自己选择类器进行分类。
- 2020-12-11下载
- 积分：1
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高校科研管理系统毕业论文
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- 2021-03-12 09:09:25下载
- 积分：1
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ADE7858和ADE7953方案电表的校准方法
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- 2020-12-09下载
- 积分：1
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RADON变换的基本原理
radon变换的基本原理，matlab源代码
- 2020-11-30下载
- 积分：1
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GEC210 Linux驱动源码
GEC210-Linux驱动源码，GEC210-Linux驱动源码，GEC210-Linux驱动源码，GEC210-Linux驱动源码，GEC210-Linux驱动源码，培训拿到的资料，很不错哦、、
- 2021-04-28 19:18:43下载
- 积分：1
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