用MATLAB的GUIDE工具做有GUI界面的串口通信上位机

Radon变换检测直线程序,Radon变换检测直线程序,Radon变换检测直线程序,Radon变换检测直线程序,Radon变换检测直线程序,

本设计以单片机 MSP430F149 作为控制核心，实现超声波测距。系统由以下部分组成：单片机最小系统模块、超声波测距模块、温度测量模块、LCD 显示模块。超声波测距模块采用超声波传感器，发射管自动发送 40KHZ 的方波，当其检测到障碍物时就会返回信号，利用时间差测出距离。温度测量模块采用温度传感器 DS18B20。最后将所测量的数据在显示器上显示出来。整个系统实现功能为根据温度的不同选择相应的声速来实现距离的测量。

求语音信号特征时必用的分帧函数，直接调用matlab工具箱运用，function函数，自定义函数。

用逐点添加的方法对散点建立delaunay三角网，适合教学用

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

自己编的，用最简单的SELECT模型和多线程技术实现的，还有许多不足之处，但是能实现基本的私聊，群聊，服务器广播功能，我会在以后加以改进。

vc++6.0。数据编程的开始。计算机等级考试必备。简体中文版vc++是Windows平台上的C++编程环境，学习VC要了解很多Windows平台的特性并且还要掌握MFC、ATL、COM等的知识，难度比较大。Windows下编程需要了解Windows的消息机制以及回调（callback）函数的原理；MFC是Win32API的包装类，需要理解文档视图类的结构，窗口类的结构，消息流向等等；COM是代码共享的二进制标准，需要掌握其基本原理等等。

基于STM32R8T6的无刷无感电机驱动，由原子的DMA的ADC基本代码修改而来，主要内容包含在control.c中，外部驱动使用的是BTS7971，使用MOS也行，ADC一直采样判断过零。有电流环控制，但是注释了，修要的把注释去掉就行。代码采用三步启动方法启动电机，有延时30电角度换向，是参考MK电调的说明文档（无刷无感直流电机攻略@timegate墨鸢）代码纯手写，可以私信问我，交流为主，但是我可能不会及时回复。

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基于OpenMP的粗粒度并行遗传算法，相比于串形遗传算法提升了运行速度。