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可靠性方法：改进一次二阶矩法+Rackwitz-Fiessler方法的Matlab源代码
【实例简介】可靠性算法，改进一次二阶矩法的Matlab源代码，结合Rackwitz-Fiessler方法，能够考虑任意分布的随机变量，里面包含部分测试例子，可直接在Matlab软件中调用执行，文件中包含详细的注释。
- 2021-11-12 00:37:12下载
- 积分：1
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基于云模型的花卉特征提取（matlab源代码）
基于正态云模型，用正向正态云发生器和逆向正态云发生器来模拟花卉的部分特征提取。
- 2020-11-29下载
- 积分：1
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opencv车辆识别正样本（纯手工抠图）708张
opencv 车辆检测 车辆识别 训练样本 cascade HOG HAAR LBP纯手工抠图 正样本
- 2021-05-06下载
- 积分：1
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基于QT5.6编写Echart动态交互示例（仪表盘）-修改版
在原有QT编写Echart动态交互示例（仪表盘）进行修改，满足基于Qt5.6版本进行运行
- 2020-12-01下载
- 积分：1
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虹膜识别matlab程序源代码
一个详尽的虹膜识别matlab源代码，采用霍夫变换的方法进行图像分割，利用海明距离进行判别，内附有虹膜库一个（6个库图像），三张虹膜测试图像
- 2020-12-03下载
- 积分：1
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SAR图像自动目标识别
基于MSTAR数据库中的目标自动识别 有完整的程序 附实验报告
- 2020-12-12下载
- 积分：1
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matlab仿真RFID标签防碰撞算法 包括二进制和ALOHA
RFID标签防碰撞算法研究 详细包括二进制和ALOHA 毕业设计专用
- 2020-12-03下载
- 积分：1
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STM32驱动12864点阵LCD，多级菜单实例，完整源码
STM32驱动12864点阵LCD，多级菜单实例，完整源码。采用STM32F103，包括12864点阵LCD驱动、KEY按键代码、多级MENU菜单设计，对LCD人机界面设计有很好的参考意义。
- 2020-06-21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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用matlab的gui编的处理实验数据的小程序
主要是对测试数据进行分析，dat或txt格式读取，xsl格式输出界面中显示处理的数据结果
- 2020-12-09下载
- 积分：1
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