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latex论文模板下载
现成的LaTeX论文模板,很好用,拿去吧~~~~
- 2020-12-02下载
- 积分:1
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高斯和拉普拉斯源码(laplacian of Gaussian).rar
【实例简介】高斯函数,拉普拉斯函数源码,很好的!
Log,锐化,平滑
形态学的细化、开、腐蚀、骨架化、扩张等
- 2021-11-28 00:36:43下载
- 积分:1
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VB.NET 通过语句 读写ACCESS数据库
VB.NET 通过语句 读写ACCESS数据库 不是通过向导建的连接ADO.NET 语句 建立数据连接 更加程序化 参数化读 包括读 dataset的表某行某列的数据
- 2020-12-06下载
- 积分:1
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FAM和SSCA算法的matlab源程序-detection and identification of signal
FAM和SSCA算法的matlab源程序-detection and identification of signalFAM和SSCA算法的matlab源程序-detection and identification of signalDISCLAIMER NOTICEMTHIS DOCUMENT IS BESTQUALITY AVAILABLE. THECOPY FURNISHED TO DTICCONTAINED A SIGNIFICANTNUMBER OF PAGES WHICH DONOT REPRODUCE LEGIBLY.ilApproved for public release; distribution is unlimitedDETECTION AND IDENTIFICATION OF CYCLOSTATIONARY SIGNALSEvandro luiz da costaLieutenant Commander, brazilian NavyB.S., Instituto Militar de Engenharia, 1980Submitted in partial fulfillmentof the requirements for the degree ofMASTER OF SCIENCE IN ELECTRICAL ENGINEERINGANDMASTER OF SCIENCE IN ENGINEERING ACOUSTICSfrom theNAVAL POSTGRADUATE SCHOOLMarch 1996Author.Evandrodk da costaapproved byRQ求Ralph Hippenstiel, Thesis Co-AdvisorRoberto Cristi, Thesis Ca-AdvisoiHerschel. Loomis, Jr, hairmanDepartment of Electrical and Computer EngineeringArthony A. Atchley / ChairmanEngineering Acoustics Academic CommitteeABSTRACTPropeller noise can be modeled as an amplitude modulated(AM) signalCyclic Spectral Analysis has been used successfully to detect the presence ofanalog and digitally modulated signals in communication systems. It can also identithe type of modulation. Programs for Signal Processing based on compiledlanguages such as FORTRAN or C are not user friendly, and MATLAB basedprograms have become the de facto language and tools for signal processingengineers worldwideThis thesis describes the implementation in mAtlab of two fast methods ofcomputing the Spectral Correlation Density(SCD)Function estimate, the FFTAccumulation Method (FAM)and the Strip Spectral Correlation Algorithm( SSCA),toperform Cyclic Analysis. Both methods are based on the Fast Fourier transformFFT)algorithm. The results are presented and areas of possible enhancement forpropeller noise detection and identification are discussedTABLE OF CONTENTSINTRODUCTIONA MOTIVATION,P,中“····*s···:···:B BACKGROUNDC THESIS GOALSIL NOISE IN THE OCEAN··+A TYPES OF UNDERWATER NOISE25561. Ambient Noise番申2. Self noise3. Radiated noise8B RADIATED NOISE FROM SHIPS, SUBMARINES AND TORPEDOES.......8C PROPELLER NOISE10lI CYCLOSTATIONARY PROCESSING15A CYCLOSTATIONARIT15B THE CYCLIC AUTOCORRELATION FUNCTION (ACF)17C THE SPECTRAL CORRELATION DENSITY FUNCTION (SCD)18N. ESTIMATION OF THE SPECTRAL CORRELATION DENSITY FUNCTION23A FFT ACCUMULATION METHOD(FAM)25B STRIP SPECTRAL CORRELATION ALGORITHM(SSCA■D28V. EXPERIMENTAL RESULTSA. ANALOG-MODULATED SIGNALS311. Amplitude Modulated(AM)Signal===2-312. Pulse-Amplitude Modulated(PAM) Signal58B DIGITAL-MODULATED SIGNALS1. Amplitude Shift Keying(ASK) Signal中中非昏号即即号自唱即自曲音非带卡.最662. Binary-Phase Shift Keying(BPSK) Signal6了VI CONCLUSIONS81A SUMMARY81B SUGGESTIONS82APPENDIX A-CALCULATION OF THE SCD FUNCTION OF AN AMPLITUDE-MODULATED SIGNAL83APPENDIX B-FUNCTION AUTOFAM95APPENDIX C-FUNCTION AUTOSSCA99APPENDIXD-FUNCTION CROSSFAM103APPENDIX E-FUNCTION CROSSSSCA109APPENDIX F-PLOTTING ROUTINES113LIST OF REFERENCES115INITIAL DISTRIBUTION LIST看音117INTRODUCTIONA. MOTIVATIONPropeller related acoustic signatures typically exhibit modulationcharacteristics. These modulation characteristics originate from the cavitationprocess that takes place in the water due to the cyclic movement of the propellerThe cavitation process is basically the collapse of air and vapor bubblesdue to variations in the static pressure. These variations in static pressure are aconsequence of the passage of the propeller blades through the water. Thismovement, cyclic in nature, causes amplitude modulation in the static pressureand as a consequence an amplitude-modulated(AM) signal can be detected in areceiverCyclostationary processing techniques have been used to detect andlentify analog and digital communication signals very successfully. Thesetechniques have the advantage of using a more realistic model for the signalthan the stationary model used in most of the more conventional signalprocessing techniquesB BACKGROUNDThe basic elements of cyclic spectral analysis are the time-variant cyclicperiodogram and the time-variant cyclic correlogram. These two functions form aFourier transform pair. This fact is known as the cyclic Wiener relation or thecyclic Wiener-Khinchin relation [Ref. 1: p. 49.1
- 2020-12-05下载
- 积分:1
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乐鑫 ESP8266 一键配置 E4A源码
乐鑫SmartConfig一键配置E4A源码,可实现esp8266wifi一键配置
- 2021-05-06下载
- 积分:1
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Linux应用程序开发成长之路
我认为非常不错的Linux应用程序开发入门教程,是我08年在中科院西安网络中心Linux开发工程师培训时的教材。Word版本,共181页。Linux 应用程序开发成长之路编著:中国科学院西安网络中心——何志华、付沿安引言第一章 Linux系统程序设计基础第二章 文件操作第三章 串行通信第四章 进程控制第五章 进程间的通信 IPC第六章 多线程编程附录A 常见的系统调用附录B 系统的结构体
- 2021-05-06下载
- 积分:1
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字符识别matlab源代码
字符识别matlab源代码,可运行,可以准确识别英文字母和数字。
- 2020-11-28下载
- 积分:1
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基于Matlab的语音信号处理
基于matlab的语音信号处理资料 是毕业设计的原文加程序源码
- 2021-05-06下载
- 积分:1
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openmv pcb原理图 5积分
openmv开源硬件资料,包括openmv1,openmv2以及openmv3的pcb原理图,sch文件可以用Eagle打开,另外提供pdf文件供快速查看
- 2020-11-28下载
- 积分:1
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linux centos6的libpcre.so.0
资源里面的内容有:pcre-7.8-6.el6.x86_64.rpm加上说明文档:里面有各种版本下载地址。我的系统是linux centos 6
- 2020-12-10下载
- 积分:1