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BOW视觉词袋模型的matlab实现易理解，模块化
这里面的matlab代码是BOW的实现，里面有kmeans++的部分，模块化，易理解，稍微改动就可以用于解决自己的问题
- 2020-11-28下载
- 积分：1
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宽带信号DOA估计
【实例简介】基于宽带信号稀疏分解的DOA估计算法的matlab仿真！
- 2021-10-29 00:31:36下载
- 积分：1
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lipschitz指数matlab程序
lipschitz指数matlab程序
- 2020-12-01下载
- 积分：1
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FTP使用简介(协议).doc
ftp简介，协议说明，使用FTP协议FTP简介文件传输协议（FTP）作为网络共享文件的传输协议，在网络应用软件中具有广泛的应用。FTP的目标是提高文件的共享性和可靠高效地传送数据。FTP协议中使用两个Socket, 将命令与数据分开传送的方法提高效率。FTP 使用 2 个端口，一个数据端口和一个命令端口（也叫做控制端口）。命令端口一般是21 （命令端口）和数据端口一般20。控制Socket用来传送命令，数据Socket是用于传送数据。客户端每一个FTP 命令发送之后，FTP服务器都会返回一个字符串，其中包括一个响应代码和一些说明信息。返回码用于判断命令是否被成功执行了 FTP模式主动模式：客户端随机打开一个大于 1024 的端口向服务器的命令端口（21），发起连接，同时开放N 1 端口监听，并向服务器发出“port N 1”命令，由服务器从它自己的数据端口 (20) 主动连接到客户端指定的数据端口 (N 1)。FTP 的客户端只是告诉服务器自己的端口号，让服务器来连接客户端指定的端口。对于客户端的防火墙来说，这是从外部到内部的连接，可能会被阻塞 注：1. 数据传输通道是在有数据传输的行为才会建立连接，并不是一开始连接到FTP服务器就立刻建立的数据通道2. port 21接受来自客户端的主动连接，port 20则是FTP服务器主动连接到客户端被动模式客户端通过PASV命令获得服务器端IP地址和数据端口，然后向服务器端发起连接请求，从而建立数据连接。服务器端只是被动地监听在指定端口上的请求1. 客户端与服务器建立命令通道2. 客户端发起PASV的连接要求3. FTP服务器启动数据端口，并通知客户端连接4. 客户端随机取用大于1024的端口进行连接 注:被动模式FTP数据通道是由客户端向服务器端发起连接的 FTP命令及响应命令:FTP命令按照ASCII格式在控制连接上传输(命令可读)，每个命令后跟回车换行符 （）USER username 向服务器传输用户名PASS password 向服务器传输密码CWD 跳转目录QUIT 从服务器上退出FTP登入 RETR filename 从远程主机获取文件STOR filename 向远程主机当前目录存储文件，如存在同名文件则覆盖MKD 在服务器上建立目录APPE 追加（包括创建）LIST 请求服务器返回远程主机当前目录下的所有文件列表NOOP 该命令不指定任何动作 ， 只是要求服务器返回OK响应 响应:命令发送后，服务器会发送相应的响应给客户端说明情况。响应是一个3位数字（xyz），后面跟一些文本信息供直接查看响应的第一位数字(x)：1：预备状态2：完成状态3：中间状态4：暂时拒绝状态5：永久拒绝状态响应第二位数字(y):0: 语法-这种响应指出了语法错误。给出的命令不存在、没有被实现、或多余1: 信息-对于请求信息的响应，比如对状态或帮助的请求2: 连接-关于控制连接和数据连接的响应3: 身份验证和帐户-对登陆过程和帐户处理的响应4: 目前还未使用5: 文件系统-请求传输时服务器文件系统的状态或其他文件系统动作状态
- 2021-05-07下载
- 积分：1
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瑞利信道仿真（多普勒经典谱）
用MATLAB的SIMULINK仿真，产生的瑞利信道，其多普勒谱为经典的U型谱
- 2020-12-03下载
- 积分：1
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数字调制的参考资料，MATLAB的数字调制信号仿真系统设计
1.多进制数字调制技术及应用2.基于Matlab的二进制数字调制系统仿真3.基于MATLAB的数字调制信号仿真系统设计4.一种新型ASK调制系统的设计与实现 等等
- 2020-12-01下载
- 积分：1
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基于DSP的pll数字锁相
PLL数字锁相的详细介绍，希望对PLL的学习者有所帮助。
- 2020-12-10下载
- 积分：1
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混合动力SUV汽车的SysML建模例子
对象管理组织（OMG）系统建模语言（Systems Modeling Language，SysML）建模实例，对混合动力SUV汽车的设计采用SysML图形建模。
- 2020-11-06下载
- 积分：1
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Vehicle Dynamics Theory and Application
不错的汽车动力学教材，是参与汽车底盘电子开发的动力学基础。Reza n. jazarVehicle DynamicsTheory and ApplicationsSpringerReza n. jazarDept of Mechanical EngineeringManhattan collegeRiverdale. NY 10471ISBN:978-0-387-74243-4e-ISBN:978-0-387-74244-1Library of Congress Control Number: 200794219c 2008 Springer Science+ Business Media, LLCAll rights reserved. This work may not be translated or copied in whole or in part without thewritten permission of the publisher(Springer Science+Business Media, LLC, 233 SpringStreet, New York, NY 10013, USA), except for brief excerpts in connection with reviews orscholarly analysis. Use in connection with any form of information storage and retrievalelectronic adaptation, computer software, or by similar or dissimilar methodology now knownor hereafter developed is forbidden. The use in this publication of trade names, trademarksservice marks and similar terms, even if they are not identified as such, is not to be taken as anexpression of opinion as to whether or not they are subject to proprietary rightsPrinted on acid-free paper987654321springer. comKavoshmy daughter, Vazan,and my wife, MojganHappiness is when you win a race against yourselfPrefaceThis text is for engineering students. It introduces the fundamental knowledge used in vehicle dymamics. This knowledge can be utilized to developcomputer programs for analyzing the ride, handling, and optimization ofroad vehiclesVehicle dynamics has been in the engineering curriculum for more thana hundred years. Books on the subject are available, but most of themare written for specialists and are not suitable for a classroom applicationA new student, engineer, or researcher would not know where and howto start learning vehicle dynamics. So, there is a need for a textbook forbeginners. This textbook presents the fundamentals with a perspective onfuture trendsThe study of classical vehicle dynamics has its roots in the work ofgreat scientists of the past four centuries and creative engineers in thepast century who established the methodology of dynamic systems. Thedevelopment of vehicle dynamics has moved toward modeling, analysisand optimization of multi-body dynamics supported by some compliantmembers. Therefore, merging dynamics with optimization theory was anexpected development. The fast-growing capability of accurate positioninsensing, and calculations, along with intelligent computer programming arethe other important developments in vehicle dynamics. So, a textbook helpthe reader to make a computer model of vehicles, which this book doesLevel of the bookThis book has evolved from nearly a decade of research in nonlineardynamic systems and teaching courses in vehicle dynamics. It is addressedprimarily to the last year of undergraduate study and the first year graduatestudent in engineering. Hence, it is an intermediate textbook. It providesboth fundamental and advanced topics. The whole book can be coveredin two successive courses, however, it is possible to jump over some sections and cover the book in one course. Students are required to know thefundamentals of kinematics and dynamics, as well as a basic knowledge ofnumerical methodsThe contents of the book have been kept at a fairly theoretical-practicallevel. Many concepts are deeply explained and their application empha-sized, and most of the related theories and formal proofs have been explained. The book places a strong emphasis on the physical meaning andapplications of the concepts. Topics that have been selected are of highinterest in the field. An attempt has been made to expose students to aPrefacebroad range of topics and approachese There are four special chapters that are indirectly related to vehicle dy-amics: Applied Kinematics, Applied Mechanisms, Applied dynamics, andApplied vibrations. These chapters provide the related background to understand vehicle dynamics and its subsystemsOrganization of the bookThe text is organized so it can be used for teaching or for self-studyChapter 1"Fundamentals, "contains general preliminaries about tire andrim with a brief review of road vehicle classificationsPart I"One Dimensional Vehicle Dynamics, " presents forward vehicledynamics, tire dynamics, and driveline dynamics. Forward dynamics refersto weight transfer, accelerating braking, engine performance, and gear ratiodesignPart II"Vehicle Kinematics, presents a detailed discussion of vehiclemechanical subsystems such as steering and suspensionsPart IIT"Vehicle Dynamics, employs Newton and Lagrange methodsto develop the maneuvering dynamics of vehiclesPart Iv "Vehicle Vibrations, presents a detailed discussion of vehi-cle vibrations. An attempt is made to review the basic approaches anddemonstrate how a vehicle can be modeled as a vibrating multiple degreeof-freedom system. The concepts of the Newton-Euler dynamics and La-grangian method are used equally for derivation of equations of motionThe RMS optimization technique for suspension design of vehicles is intro-duced and applied to vehicle suspensions. The outcome of the optimizationtechnique is the optimal stiffness and damping for a car or suspended equipmentMethod of presentationThis book uses a fact-reason-application"structure. The "fact"is themain subject we introduce in each section. Then the reason is given as a" proof. The application of the fact is examined in some examples. Theexamplesare a very important part of the book because they show howto implement the facts. They also cover some other facts that are neededto expand the subjectPrerequisitesSince the book is written for senior undergraduate and first-year graduatelevel students of engineering, the assumption is that users are familiar withmatrix algebra as well as basic dynamics. Prerequisites are the fundamentals of kinematics, dynamics, vector analysis, and matrix theory. Thesebasics are usually taught in the first three undergraduate yearsPrefaceUnit SystemThe system of units adopted in this book is, unless otherwise stated, theinternational system of units(SI). The units of degree(deg)or radian(rad)are utilized for variables representing angular quantitiesSymbolse Lowercase bold letters indicate a vector. Vectors may be expressed inan n dimensional Euclidian space. ExamplerCUppercase bold letters indicate a dynamic vector or a dynamic matrix, such as force and moment. ExampleFo Lowercase letters with a hat indicate a unit vector. Unit vectors arenot bolded. ExampleLowercase letters with a tilde indicate a 3 x 3 skew symmetric matrixassociated to a vector. Examplea3211An arrow above two uppercase letters indicates the start and endpoints of a position vector. ExampleON = a position vector from point o to point Ne The length of a vector is indicated by a non-bold lowercase letterExampleCapital letter B is utilized to denote a body coordinate frame. ExampleB(ocgB(Oxyz)B1(o1x19121)ⅹ11PrefaceCapital letter G is utilized to denote a global, inertial, or fixed coordinate frame. ExampleG(XYZG(OXYZRight subscript on a transformation matrix indicates the departureframes. ExampleRB= transformation matrix from frame B(oxyz)Left superscript on a transformation matrix indicates the destinationframe. ExampleRBtransformation matrix from frame B(o cgz)to frame G(OxYZ)Capital letter R indicates rotation or a transformation matrix, if itshows the beginning and destination coordinate frames. Example0BSIn a0Whenever there is no sub or superscript, the matrices are shown in abracket. ExampleCOS asin a osIn aCOs O0e Left superscript on a vector denotes the frame in which the vectoris expressed. That superscript indicates the frame that the vectorbelongs to; so the vector is expressed using the unit vectors of thatEr= position vector expressed in frame G(OXYZ)Right subscript on a vector denotes the tip point that the vector isreferred to. ExamplePsition vector ofexpressed in coordinate frame G(OXYZ)Right subscript on an angular velocity vector indicates the frame thatthe angular vector is referred to. ExampleB= angularof the body coordinate frame B(oxyz)
- 2020-12-12下载
- 积分：1
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mathcad清华教材
一本不错的mathcad书籍,在家看看吧常用数学软件丛书M ahead2000实用教程郑桂水等编著F荤原北京田书在版编目(CIP)数据Mathcad200实用教程/郑桂水等编著.北京国防工业出版社,2000.9(常用数学软件从书)ISBN7-118-02320Ⅰ.M...Ⅱ.郑、Ⅲ.数值计算一应用软件,Methed12000Ⅳ.0245中国版本图书馆CP数据核字(20)第26933号囤·聿宫照社出版发行北京市海淀区紫竹院南路23号〔邸政圳码1K44河飞酸乌.厂印刚新华书店经兽开本787×1002116印张16填39千字2000年9月第1版2000年9月北京郸1次印刷印效:1—4000册定价:24.00元本节如有印骏错误我杜负资调换〕前言Mathod是Mt五So公司推出的一个交互式的数学文字软件。该软件定位于向大教师学生工程人员提供一个兼备文字处理、数学和图形能力的集成工作环境,以使他们能方便地准备教案、完成作业和准备科学分析报告。 Mathcad在对待效值计算、符号分析、文子处埋图形能力的开发上,不以专业水准为追求,而尽力集各种功能为一体。需讲究精度、速度、算法稳定性的数值计算问题和需终复杂推理的符号运算问趣,都不是Mathcad所致力解决的目标。Mathcad有三大“面向大众”的特点:1. Mathcad的数学式同平常文稿中的书写格式一样,因而形象、直观便于阅读。用户可以按习惯的标准书写格式输人数学公式方程组和矩阵计算机能直接给出或数字或符号或图形的结果,用户无须考虑方法以及中间步骤。2. Mathcad生成的“电子书籍”中的指令、函数、图形都是“活的”,指令中的任何参数的变化都会使相应的结果发生改变3.灵活的“便笺”式的文字处理功能:可以输人文本,对方程、公式或图形进行注释和说明,从而生成各种报告和科学论文Mathcad可以处理各种数值运算,如数值的代数运算、复数运算、矢量和矩阵运算解方程与方程组徽分和积分的数值解、插值运算、微分方程求解等。 Mathcad在加人软件包自带的Mapd插件后还能进行符号运算,如因式分解符号徽积分、解符号方程级数与变换等。 Methed还可以绘制二维和二维图形,通过对图形结果的分析,使用户对问题的理解更加形象。 Mathcad还可以制作动画,所制作的动可以脱离 Mathcad而直接在Windows里播放。除了上述的数值运算、符号运算、图形和动画功能外, Mathcad还可以进行文字输人,以便生成论文和报告本书包括12章内容安排如下;第1章和第2章介绍 Mathcad2000的用途及基本用法。第3章介绍如何利用 Mathcad进行基本的算术与代数运算。第4章介绍 Mairead的矢量和矩阵运算。第5章介绍如何利用 Mathcad求解方程和方程组,以及如何利用 Mathcad进行规划求解等第6章介绍 Mathcad的符号运算功能。第7章和第8章介绍 Mathcad的图形功能,包括二维图形和三维图形。第9章介绍 Mathcad分析数据的功能。第10章介绍微分方程的求解。第11章介绍Mthd的编程功能。个+2Ⅳ第12章介绍如何利用 Mathcad制作动画Mathcad的功能十分强人,本书只能对读者起一个人门和引路的作用,如果要使用好Mathcad,发搁它的强大功能,需要读者多加练习,提高技巧。由于作者的水半有限,时间仓促,书中定有不少的疏漏和欠妥之处,恳请读者批评指除∫面卜著名的編著者以外,参加本书编著工作的同志还有:黄建森、林振宇、许宁林章庆藤小香、袁军冯曙红刘浪、张越胜、黄重阳、粱祥龙杨旺平、张晓等人,在此一并表示感谢。编著者内容简介本书介绍了 Mathcad的基础慨念和操作,循序渐进地讨论 Mathcad2000的使用方法,以便读砻能在较短时间内学会使用 Mathcad2000本书共分12章,内容包括: Mathcad的基本概念; Mathcad数值运算,如数犢的代数运算、复数运算、矢量和矩阵运算、解方程与方程维、微分和积分的数值锵捕值运算微分方程求解等; M athenai的符号运算,如因式分解、符号微积分解符号方程,级数与变换等; Mathcad的图形功能,包括绘制维图形、三维图形和动画.另外附录A介绍了 M ahead的内部数,附录R介绍了 athecate的错i信息,附录C介绍 M alcali的键盘操作。本书图文并茂,示例丰富,易学易用c可作为相关专业高校教材,或计算机培训班教材,也适合于非计算机专业的各类研究设计人员、计算机揲作人员及大 Mathcad用户参考。目录第1章 Mathcad筒介…1.1什么是 Mathcad………2 Mathcad的用途1.3运行环竞…………第2章 Mathcad入门會會■■■俨口■■自血自『會■自自會自【曾十自4會■忄曾血嚯會曾早中1!會自?甲2,1 Mathcad主窗口…,…"…":·日a2.2基本概念和基本操作2.2.1M盘 thad二作表…h●◆如■■●ψ■■pψφd■ψφb4d↓db中‘b4如d命ph甲↓2.2.2变量……56223函数………………2.2.4建立数学式上』L■县·』↓晶■■_↓b■↓晶昌■22.5編辑数学式2,2,6范围变量血山2.2.7区域操作………………,,…………2.3文本…b啬申咖4如bb4如4中吾b自··吾B吾吾日·B·吾山.·‘b山4442.3.1入文本13232在文本中插入数学区域……2.33摑入超级链接唱d■唱p山d24 Mathcad主菜单……1524.1File莱单………l524.2lit菜单●中·幽162.4.3View菜单24.4Ⅰnert菜单■■■q●幽PP中■}曾俨申■自P罾冒晋■■■冒俨『■鲁■■4b■192.4.5 Furmat菜单…,…………2024,6Math菜单……中d如d●p242.4菜单27248 Window菜单与Help萸堂292.5工具栏……292.5.1 Standard工具拦…………P平冒■■■冒冒P………2925.2 Formatting工具烂甲F口号■25.3Math工具栏292,5.4 Calculator l具誉甲『冒4昏『甲■個冒bb■Ⅵ2.5,5 Evaluation工具栏■■■↓p■冒司P■;↓■冒P中tP◆可中曾·F·自·_■■_口口·m■·■■·■■■·■■日。■日■302.5.6 Calculus工具拦32.5.7 Boolean工具栏32.5.8 Greek.具栏……………………………32第3章算术与代效算333.1基4代数运算……………333.1.1四则运算及乘方开方运算P日+F:::P日4■■@Pqp■司●即…33.1.2范围变量口d■■■■d…………………………353.2两数运算……:353.2.1函数射输入…353.2.2三角函数及反三角函数…………………■中中4鲁P自中………53.2.3对数函数与指数函数…373.2.4双曲函数与反双曲涵数……3.2.5整数函数……·"…………*………………………………383.26随机数生成数…自■自■■■自唱自■■自■■■·b■■自自■■自b■自白■·聊4●即幽“血d咖●p申电咖_电即D申司自■看38327求整函数3.28条件函数…393.3微分与积分…………………………………………………………………………403,3,1分运算………………3.32积分运算……∴……·423.4复数运算■b■口■bh■d■bh■■■h■■hdh■■b■■■■hbd晶最b■■凸■b山■晶bb■■山■昌bb山凸-433.4.1复数实郣和虚部画口■口■口■■■■433.4.2复数福角与复数的嫫…343复数四则运算与乘方开方运算■■■■■口■■■■■■■■■344复数的函数运算………………………………………………4534.5共轭复数4534.6复数的傲积分运算453.5使用单位…■■罪■二晶b■■晶晶↓晶■■备‘■■↓昌■■L■■晶晶晶■■↓q甲L4635.1对一个变应用单位…352带单位计算…4735.3自定义单位自···即中自中P··中中中4号·中中宁中會自‘T『日TP『日日35.4有关单位的选项↓L■晶■■■晶↓L■■郾福昌■■↓■■·晶昌b↓「●』轟bb中↓鼻b·ψb山↓山古一+b山·=—48第4章矢量与矩阵4.1矩阵工具栏……;r………………∴………504.2创建矢量和矩阵………………514.2.1直接输入矢量或矩阵…4.2.2通过表达式生成矩阵………………■■■一■■■■■■…………524.2.3输入输出数据又件■………524.2.4通过表格输入矩阵…53Ⅶ4.3矢量运算◆日‘日a+b日.··a·日日目p日导日日电●p■p中■自■血4.3.1矢量的加减运算及数乘……………………………………………544.3.2矢量的数量积b曲p血p@■…………554.3.3矢量的向量积……………………………………………………………"…554.3.4矢量的和…554.4矩阵运算P■血……554.4.1矩阵加减和数乘■■d■■■↓b●d■b■h●bψd谭b如p·q。pdb口·P■554.4.2矩阵的转置与矩阵相乘甲·■口■p■■■■d4.4.3方阵行列式值、逆炬阵和乘方………564,5矩阵的合并与提取子矩阵…………………………………………574.5.1先阵元素.·4·日日·日·4·日“·日44中◆4中卓!■!甲■■■昏■■■晋■■命如bd如看最bd+p■口■●pm司4.5.2矩阵合并…4.5.3提取子矩阵………………………"….……-5846矩阵的特征值与特征矢量………警冒肀■噜鲁會中q■■■■q晋■■唱■h昌■凸西』晶■■■如■ ta p■4.6,1求短阵的所有特征值…■·中中鲁4.6.2求矩阵的所有特征矢量……594.6.3求对应于某一特征值的特征矢量594.6.4疒义特征值和特征矢量昏■■q■■噜哂↓■■■↓■■聊命L64.7其他矩阵函数……………4.7.1特殊矩阵…………·申暗D日■·日日q日↓日日日日日日%吾↓↓4↓.“晶4a=-a+日b平m日t鲁曾中曾會64.7.2矩阵的特性函数4.8矩阵的分解4.8.1矩阵的奇异值分解晶b山↓b■■4.8.2矩阵的QR分解……………………………………………………634.8.3矩阵的LU分解484对称正定炬阵的 Cholesky分解……r654.9矢量和矩阵的排序冒會P會中·自4冒『■■k■山4七晶db…………654.9.1求最大和最小元素值4.92矢量排序……■口◆·■■中■■■·『■自■4即493炬阵排序……■■■·■日■會卓-·鲁·■■■■■■即日_●4.10矩阵的矢量化运算1■t曾自』會■■d■■■■算5章方程与规划求解……685.1解一元方程…………………■口■申···D■··争■■···■■··■■·曹鲁P◆血qt翟■■■↓■■■晋bdd古db5.1.1解一元項式方程■自『自血血冒伽自由司即看●·甲甲司血曲血曲■餐5.12求解其他一元方程………………………………695.13求解精度…………………·詈『中自詈會◆■斷自■■斷■自■■即■■q噌·■口·阜咱嘈啁◆φ◆嘻p申p■昏▲■■■昏baad705.I4求解一组带参数的方程………7l52线性方程组…………:753非线性方程组血d血身b●…72
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