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java web网上购物系统+毕业设计(完整版)
java web网上购物系统+毕业设计(完整版) 只需要导入jar包就可以跑起来 包括毕业设计论文 java web网上购物系统+毕业设计(完整版) 只需要导入jar包就可以跑起来 包括毕业设计论文
- 2020-12-05下载
- 积分：1
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锂电池组SOC估计算法经典文献
锂电池组的SOC估计算法文献，适用于初学者，很好的资料
- 2020-11-28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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storm32三轴手持增稳云台项目实现代码
基于STorM32BGC的三轴手持增稳云台项目实现代码，水平不高，电机驱动实现可能存在问题，会导致电机发热。
- 2020-06-02下载
- 积分：1
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指纹识别（数字图像处理+模式识别+机器视觉+边缘检测）
不可多得的指纹提取的好东东！压缩包内含有指纹图片预处理的完整文档，长达数页。同时，附有全套的程序代码，由matlab写成。程序中含有近十种边缘检测算法的实现，非常有用。
- 2020-11-27下载
- 积分：1
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基于DSP和双向Z源逆变器的纯电动汽车电机驱动与车辆控制系统
基于DSP和双向Z源逆变器的纯电动汽车电机驱动与车辆控制系统
- 2020-11-29下载
- 积分：1
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Gurobi_8.1.0版本 64&32;位 最新版本 支持Windows、Linux、Macos系统
Gurobi 可以解决的数学问题： 线性问题（Linear problems） 二次型目标问题（Quadratic problems） 混合整数线性和二次型问题（Mixed integer linear and quadratic problems） 突出的性价比。
- 2020-11-28下载
- 积分：1
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强大的完善的 活动抽奖系统（适合各单位搞的活动用）
创意点一： 实现了一个根据人数自动变化抽奖屏幕的抽奖圆盘，抽奖通过圆盘动态显示，能够让台下观众看清楚转盘的情况，增加刺激性以及参与度。创意点二： 不仅实现转盘的动态显示，而且还有一个动态显示转盘转到什么名单的地方，这样做的目的是追踪圆盘的轨迹，且增加了系统的刺激性。创意点三： 这个抽奖系统，以及抽奖形式（据本人了解），在生活中常有出现，但是并没有人尝试开发相应的抽奖系统，故说我们实现了创意，发掘了生活中的创意点以及充分体现了我们的激情以及创造性。创意点四： 为了能够让这个系统能够让不同的单位显示，我们故意添加了背景，从而可以让不同单位在使用本系统的时候添加属于自己的标志。
- 2020-12-02下载
- 积分：1
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读取TLE卫星两行根数
该mathlab程序运用于读取.txt格式的卫星两行根数文件，并统计卫星信息
- 2020-12-12下载
- 积分：1
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stm32 IAP源码
都说ST官方上有源码怎么找都只找到对应的IAP 的pdf而已，没有找到相应的源码，后来在其他网站还是下载到了，针对stm32f10xx系列的；
- 2020-12-06下载
- 积分：1
