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matlab SIRT CT重建算法
基本的SIRT重建算法，已调试，可以运行。做的比较简单，有兴趣的话可以在这个的基础上加点东西。欢迎交流讨论~
- 2020-12-04下载
- 积分：1
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lighttools6.3附带例子
lighttools附带例子,包括TIR和LED模型等
- 2020-12-08下载
- 积分：1
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Python爬取新冠肺炎疫情实时数据
利用Python爬取新冠肺炎疫情实时数据，Pyecharts画2019-nCoV疫情地图 腾讯网页数据有点变化，所以重新爬取了一下 基于pyecharts的可视化，这次更新新加了注释 数据源 [腾讯疫情实时追踪](https://news.qq.com/zt2020/page/feiyan.htm?from=timeline&isappinstalled=0) 后期会继续更新pyecharts的绘图，搭建可视化大屏，感兴趣的可以先关注一下
- 2020-03-24下载
- 积分：1
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西电的雷达原理第三版课本及习题答案
西安电子科技大学雷达原理第三版电子书及课后习题答案
- 2020-12-12下载
- 积分：1
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SAR成像RD算法
SAR成像经典算法，文档包含RD算法原理、程序、运行结果等
- 2021-05-07下载
- 积分：1
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比较全面、深入的5G核心网知识介绍
5G设备系统厂家技术专家编写的培训材料，比较全面、深入地介绍了5G核心网的系列知识。3GPP 5G ongoing Releases5 G Phase1及 Phase2主要支持功能(SARe-15标准5G服务化移动性/会话/eMB特性56 Voice语音业务策略控制4G/5G高效用户面架构接入管理over nrEPS Fallback架构互操作路径选择Re-16标准5G服务化56到3的切片漫游及网络能力大数据分析mMTc架构增强SRVCC互操作开放功能标准化 URlLCE特性1Re15阶段关注最紧急的应用案例以满足市场需求,完成5G核心网整体架构及基本功能的定义,攴持·Re16阶段重点进行现有核心网架构的增强和完善,包括完整的 JeMBB,mMTC和RLC三个场景的内容eMBB业务基础特性、VoNR语音功能以及 EPS Fallback功能服务化架构及网络切片能力增强以及在未部署 VoltE情况下5G语音的连续性方案设计888DCONTENTS。,15G核心网标准5G核心网络架构∴∴∴∴35G核心网特性与关键技术8888.".∴∴∵∴∴∴,5G System ArchitectureNCEFNG-CP LNENREPCFUDMAF4G网络架构② Nef nmf Npce nudoNamfNsmf③3S1-MMESeaMMEPCRFAUSFAMFSMFMMES1LTE-UySGOperators IP以5G网络架构F-UTRANsErvIngUEPDNServicesGatewayGatewayRANS1-U(e.g. IMS, Pss etc.UEDIUPFDN,,。"。。,,相比EPC核心网架构,5G核心网变化①控制转发分离网络结构更加扁平化,控制面功能集中部署、用户面功能可以根据业务需可下沉到网络边缘,减少路由迂回;②控制面功能模块化设计将网元(NE)拆解为多个网络功能(NF)服务,网络功能服务可以独立扩展,按需编排和分布式部署;③服务化接口网元之间的点到点接→网终功能之间点到多点接口,各网终功能之间可以根据需求任意通讯,优化通讯路径,提高通信效率;④功能组件集中管理引入NRF,可以实现网终功能服务自动管理(自动注册/更新/去注册、自动发现和选择、状态检测、认证授权等);⑤统数据管理NF( Network FunctionAMF:唯一的N1和N2接凵终结点、注册及迕接管理、移动性及可达性管理、接入认证及安全锚点功能等;·sM":会话管理(建立、修改、释放)、卩P地址分配、选择和控制UP、终结会话部分NAs消息、策咯执行和Qos的控制部分、下行数据通知、确定会话SSC模式、计费等;PCF:支持统一的策略控制框架、提供策略规则到控制平面功能执行( SME AMF);支持面向ασS、计费、按需会话管理、按需接入及移动性管理制定策略;AUsF:认证服务器功能,为UE执行认证流程、保持安全上下文等;NRF:维护部署的NF实例信息,提供网络功能注册和发现功能,使得控制平面功能能够彼此发现和直接通信;UDM:存储用户签约数据、策略数据等·UPF:分纠路由和转发、分组检测、用户平面部分策略执行、流量使用量上报、UL-CL、分支点支持多宿主PDU会话、下行数据缓存等;NSsF:为UE选择服务的网络切片实例、决定为UE服务的 AMF Set或候选AMF表;·NEF:维护开放的网络服务列表、作为面向应用的入口功能等;BsF:实现5G用户会话绑定功能;· NWDAF:网络数据分析功能,负责采集并分析网络状态信息,并将网络状态分析信息通知/发布给订阅它的PCF和NSsF,供PCF决策和NSsF切片选择;Rel-15仅支持对切片负载级别的分析;8885G System Architecture for non-roaming scenario5G网络架构新增特性◆网络切片新增网络切片选择功能NSSF。网络可针对不同QOS业务,部署不同切片服务化架构通过网络功能重构,控制面形成多个独立网络功能,NF部署更加灵活控制面新增NRF,实现NF服务化管理功能、NF寻址、服务发现功能、网络切片选择控制面NF接口协议栈为HTTP,接口形式为RestfulAP的服务化接口◆边缘计算EC·∪PF只处理分组路由和转发,可下沉至网络边缘,支持灵活的本地业务应用5G边缘UPF完全由SMF选择、控制,解决了4G边缘计算在业务连续性、移动性、计费等方面存在的问题网络能力开放新增网络开放功能NEF,易于运营商部署更多业务应用为运营商提供增加业务收入的可能888D5G System Architecture for roaming scenario,,,,。。。分为本地疏导架构和归属地路由架构;在本地疏导架构(如图)中,漫游UE在拜访网络中3Gpp连接数据网络;在归属地路由NSSFNEFNRFPCFUDMNRF架构中,漫游UE在归属网络中NnssNorfNaNudeNorf连接数据网络:VSEPPhSEPP安全代理SEPP( Security EdgeNsmfNausNpcProtection Proxy)部署在PLMNAMFSMFAUSEPCFNEF网络边缘,作为非透明传输代理节点,通过N32接,保护N1N2N4VPLMNHPLMN归属地和拜访地之间控制面漫UE(R)ANUPFDN游消息的传递;实现拓扑隐藏,内部的网络拓扑结构对外不可见;SBI( Service Based Interface服务化接口N2传输协议HTP20ersN4∴序列化协议JSON,JSON相比现有Dⅰ ameter性能ANUPESME: :: :AMFPCUDMNRENSSSFNsmfNamfUdm::: Nhrf::: Ns上有差距,但通用性、可描述性、可读性更强服务化接口交换接口风格REST;基于HTTP/RESTFUL的通信接口NF之间生产者科消费者模式,交互模型为RQJSONRSP和 SUB-NOT|FY;Http 20TLS4G网中大量使用 Diameter协议,56网务今EPC网络有联互通需求,因此5G信令网中应攴持两种信令协议共存与互转的情况;服务化接口的优势i化接口设计:网络功能服务间的交互解耦,不同服务实例的接口可重用,无需逐按照业务流程定义接口消息优化参数传递:参数只在请求者和响应者间传递,无需跨越整个业务流程,提鬲实时性,可靠性支持网络功能的局部调整:功能更新明确到服务,只对请求者和服务者有影响,对体业务流程影响小,提高功能调整效率∴有利于业务流程的标准化推进:无耑重复榘构、接凵和流程等标准化过程,聚焦更新服务,甚至可以先开发再标准;888D…∵∵∴Control plane Protocol stack∴∴∴∴∴°。UE连接到网络中使用一个唯一的N1NAS连接,唯一的N1终结点位于AMF;N1接口上的NAS协议包括 NAS MM部分和 NAS SM部分;NAS MM消息包括注册管理和迕接管理的NAS消息;.: NAS SM支持处理UE和SMF之间的会话管理,支持PDU会话用户面的建立、修改和释放会话管理信令和短消息通过 NAS MM协议传输:
- 2020-12-05下载
- 积分：1
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模糊控制及其matlab仿真.zip
模糊控制及其matlab仿真 教材 石辛民 清华大学出版社。主要介绍matlab的模糊控制工具箱，模糊控制pid参数和模糊控制的实例
- 2020-03-01下载
- 积分：1
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黑客防线2004精华本
黑客防线2004精华本
- 2020-11-29下载
- 积分：1
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Concepts in Programming Languages.pdf
Concepts in Programming Languages by John Mitchell.一本国外经典教材，看了之后对编程语言更加理解。费了很多劲才找到的。Concepts in Programming LanguagesThis textbook for undergraduate and beginning graduate students explains and examines the central concepts used in modern programminglanguages, such as functions, types, memory management, and controlThe book is unique in its comprehensive presentation and comparisonof major object-oriented programming languages. Separate chapters ex-amine the history of objects, Simula and Smalltalk, and the prominentanguages c++ and JavaThe author presents foundational topics, such as lambda calculus anddenotational semantics, in an easy-to-read, informal style, focusing on themain insights provided by these theories. Advanced topics include concurrency and concurrent object-oriented programming. A chapter on logicprogramming illustrates the importance of specialized programming meth-ods for certain kinds of problemsThis book will give the reader a better understanding of the issuesand trade-offs that arise in programming language design and a betterappreciation of the advantages and pitfalls of the programming languagesthey useJohn C. mitchell is Professor of Computer Science at Stanford University,where he has been a popular teacher for more than a decade. Many of hisformer students are successful in research and private industry. He received his ph D. from mit in 1984 and was a member of technical staff atat&T Bell Laboratories before joining the faculty at Stanford. Over thepast twenty years, Mitchell has been a featured speaker at internationalconferences; has led research projects on a variety of topics, includingprogramming language design and analysis, computer security, and applications of mathematical logic to computer science; and has written morethan 100 research articles. His previous textbook, Foundations for Pro-gramming Languages(MIT Press, 1996), covers lambda calculus, typesystems, logic for program verification, and mathematical semantics ofprogramming languages. Professor Mitchell was a member of the programming language subcommittee of the ACM/ieEE Curriculum 2001standardization effort and the 2002 Program Chair of the aCm principlesof programming languages conferenceCONCEPTS NPROGRAMMINGLANGUAGESJohn c. mitchellStanford UniversityCAMBRIDGEUNIVERSITY PRESSPUBLISHED BY THE PRESS SYNDICATE OF THE UNIVERSITY OF CAMBRIDGEThe Pitt Building, Trumpington Street, Cambridge, United KingdomCAMBRIDGE UNIVERSITY PRESSThe Edinburgh Building, Cambridge CB2 2RU, UK40 West 20th Street, New York, NY 10011-4211 USA477 Williamstown Road, Port Melbourne vic 3207, AustraliaRuiz de alarcon 13, 28014 Madrid, spainDock House, The Waterfront, Cape Town 8001, South Africahttp://www.cambridge.orgo Cambridge university press 2004First published in printed format 2002isBN 0-511-03492-X eBook(adobe readerISBN 0-521-78098-5 hardbackContentsPrefacepage IxPart 1 functions and foundations1 Introduction1.1 Programming Languages1.2 Goals1.3 Programming Language History3561.4 Organization: Concepts and Languages2 Computability2. 1 Partial Functions and computability102.2 Chapter SummaryExercises163 Lisp: Functions, Recursion, and Lists3.1 Lisp History183.2 Good Language design203. 3 Brief Language overview223.4 Innovations in the Design of Lisp253.5 Chapter Summary: Contributions of LispExercises404 Fundamentals484.1 Compilers and syntax484.2 Lambda calculus4.3 Denotational semantics4.4 Functional and Imperative Languages4.5 Chapter SummaryExercisesContentsPart 2 Procedures, Types, Memory Management, and Control5 The algol Family and ML5.1 The Algol Family of Programming Languages5.2 The Development of C5.3 The LCF System and ml5.4 The Ml Programming Language1035.5 Chapter summary121Exercises1226 Type Systems and Type Inference1296.1 Types in Programming1296.2 Type Safety and Type Checking1326.3 Type Inference1356.4 Polymorphism and Overloadin1456.5 Type Declarations and Type Equality1516.6 Chapter Summary155Exercises1567 Scope, Functions, and storage Management1627.1 Block-Structured Languages1627.2 In-Line blocks1657.3 Functions and procedures1707.4 Higher-Order functions1827.5 Chapter summary190Exercises1918 Control in Sequential Languages2048.1 Structured control2048.2 Exceptions2078.3 Continuations2188.4 Functions and evaluation order2238.5 Chapter summary227Exercises8Part 3 Modularity, Abstraction, and object-Oriented Programming9 Data Abstraction and Modularity2359.1 Structured Programming2359.2 Language Support for Abstraction2429.3 Modules9.4 Generic Abstractions2599.5 Chapter Summary269Exercises27110 Concepts in Object-Oriented Languages27710.1 Object-Oriented design27710.2 Four Basic concepts in object-Oriented languages278Contents10.3 Program Structure28810.4 Design Patterns29010.5 Chapter summary29210.6 Looking Forward: Simula, SmalltalkC++Java293Exercises29411 History of objects: Simula and smalltalk30011.1 Origin of Objects in Simula30011.2 Objects in Simula30311.3 Subclasses and Subtypes in Simula30811.4 Development of smalltalk31011.5 Smalltalk Language features31211.6 Smalltalk flexibilit31811.7 Relationship between Subtyping andInheritance2211.8 Chapter SummaryExercises32712 objects and Run-Time Efficiency: C++33712.1 Design goals and Constraints33712.2 Overview of c++34012.3 Classes. Inheritance and Virtual functions34612.4 Subtyping35512.5 Multiple inheritance12.6 Chapter summary366Exercises36713 Portability and Safety: Java38413.1 Java language overview38613.2 Java Classes and Inheritance38913.3 Java Types and Subtyping39613.4 Java System architecture40413.5 Security Features41213.6 Java summary417Exercises420Part 4 Concurrency and Logic Programming14 Concurrent and Distributed Programming43114.1 Basic Concepts in Concurrency43314.2 The actor model44114.3 Concurrent ML14.4 Java concurrency45414.5 Chapter Summary466Exercises469Contents15 The Logic Programming Paradigm and Prolog47515. 1 History of logic Programming15.2 Brief Overview of the logic Programming Paradigm4715. 3 Equations solved by Unification as Atomic Actions15.4 Clauses as Parts of procedure declarations48215.5 Prologs Approach to Programming48615.6 Arithmetic in Prolog49215.7 Control, Ambivalent Syntax, and Meta-Variables49615.8 Assessment of Prolog50515.9 Bibliographic remarks50715.10 Chapter Summary507Appendix a Additional Program Examples509A 1 Procedural and Object-Oriented organization509Glossary521Index525
- 2020-12-09下载
- 积分：1
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qt编写的GPS界面
对GPS获取的数据可以在界面上显示，并且有界面对定位的位置进行显示。
- 2020-12-10下载
- 积分：1
