-
基于Android的百度API旅游地图应用开发参赛作品完整版
基于Android的百度API旅游地图应用开发参赛作品完整版包括:文档源代码安装包
- 2020-12-02下载
- 积分:1
-
C#实现的基于BP神经网络的数据预测(降雨量+铁矿石进口量预测)(有界面)
使用BP神经网络对样本数据(某水库年降雨量监测数据 + 中国铁矿石年进口量监测数据)进行操作,生成需要的训练数据和测试数据。并使用这些数据进行训练处误差小于指定要求的网络,之后可根据界面获取需要预测的年限,并最终进行预测
- 2020-12-06下载
- 积分:1
-
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
-
滑模控制理论Sliding mode control Utkin
【实例简介】sliding mode control 英文版的,是学习滑模变结构控制理论的人士必读的书籍,通俗易懂
- 2021-11-11 00:32:12下载
- 积分:1
-
数字下变频实验
数字下变频实验ppt,包括原理,matlab实验和fpga实现。
- 2020-11-27下载
- 积分:1
-
matlab仿真博弈论
通过matlab实现对博弈论的仿真,并加入一个具有学习机制的间谍,通过仿真得到间谍对整个系统的影响
- 2020-12-05下载
- 积分:1
-
虚拟串口 Virtual Com.rar
开发虚拟串口驱动程序、虚拟串口软件、Windows下虚拟串口的源代码
- 2020-11-06下载
- 积分:1
-
基于单片机的温度控制系统
基于单片机的温度控制系统,有程序,电路图,proteus仿真原理图,还有课程设计报告
- 2020-11-30下载
- 积分:1
-
学校教材订购系统(代码+文档)
本人大学中做得最完美的课程设计。采用的是VS2005+SQL Server 2000。基于对话框的MFC程序。花了较多的精力,绝对原版。内含开发的全部文档和代码,经测试,功能都已经实现。由于未详细测试,估计还是有错误。有关文档和代码的问题不能解决,可加本人QQ:269858997,私聊。
- 2020-12-02下载
- 积分:1
-
软考信息安全工程师历年真题和答案 word版 无水印可打印
软考信息安全工程师历年真题和答案 word版 无水印可打印
- 2020-12-11下载
- 积分:1