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角谱法计算菲涅尔衍射
代码是MATLAB环境下用角谱的方法计算菲涅尔衍射全息图的方法。
- 2020-11-28下载
- 积分:1
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project 进度计划 各楼栋总进度计划
project项目案例(完整的过程),各楼栋总进度计划-00.mpp
- 2021-05-06下载
- 积分:1
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完整python项目,python爬虫 爬取今日头条后台数据,使用flask框架 。html实现前端
完整python项目,可以自己运行。利用python爬虫 爬取今日头条后台数据。然后使用flask框架 实现自己的后台 ,通过爬虫获取 今日头条数据。html实现前端 显示数据。网站UI一级界面自己实现,仿照今日头条网站
- 2020-12-05下载
- 积分:1
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四种PID控制的性能比较
对同一控制对象分别采用常规PID控制,模糊自适应PID控制,BP神经网络PID控制,遗传算法PID控制进行仿真分析,得出各个控制方法的优劣。
- 2020-12-01下载
- 积分:1
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采用STC12C5A60S2单片机作为主控芯片实现了PID电机调速控制器
本设计采用STC12C5A60S2单片机作为主控芯片实现了PID电机调速控制器。传感器采用欧姆龙的200线编码器。电机驱动模块采用L298N,使用LM2596来对电机供电。设计中的重点是电机转速的获取和基于PID的电机控制算法的实现。
- 2020-11-03下载
- 积分:1
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序贯蒙特卡洛
可以参考的sis(序贯蒙特卡洛),大家相互学习,一起加油!
- 2020-12-11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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多传感器数据融合讲稿 多传感器数据融合讲稿
多传感器数据融合讲稿 多传感器数据融合讲稿 多传感器数据融合讲稿 多传感器数据融合讲稿
- 2020-12-10下载
- 积分:1
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冈萨雷斯《数字图像处理》Digital Image Processing 4th Edition Rafael C. Gonza...
【实例简介】文字版PDF, 非转换PDF。数字图像处理,冈萨雷斯,文字版,英文版,第四版,英文版电子书:Digital Image Processing 4th Edition
- 2021-10-31 00:31:46下载
- 积分:1
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图像合并,可以实现多张图片快速合并一一张
可以实现把多个图像快速合并成一张图片,源码,有图片可供直接实验
- 2021-05-06下载
- 积分:1