软考-信息安全工程师（汇总1000题）

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

基于STM32的CC1101收发程序，此程序是经过测试通过的。

本书共15章，分为3篇。第一篇为Matlab及图像基础，第二篇为基于Matlab的常见图像处理技术，涵盖内容有数字图像的运算、数字图像增强系数、数字图像复原技术、图像分割技术、图像变换技术和色彩图像处理；第三篇为基于Matlab的高级图像处理技术及应用，涵盖的内容有图像压缩编码、图像特征分析、图像形态学处理、小波在图像处理中的应用、基于Simulink的视频和图像处理和Matlab图像处理综合实例。

此版本为注册版（提供内存注册机，由于采用了内存注入技术，部分杀毒软件会报毒。但绝不是病毒，请放心使用。）绝非破解版，保证软件功能未做修改!使用方式：1、安装名字叫MapTileDownloader_Ultimate_1.9.5的文件2、将注册机和imaps.exe复制到软件安装目录（将安装目录内原始的imaps.exe文件改个名字为imapsod.exe）3、运行注册机4、点击“获取注册码”5、注册机调用imaps.exe并读出注册码，复制注册码到弹出的注册窗口，然后点注册，然后弹出软件窗口，直接关闭窗口；6、将imapsod.exe改回原始名字imaps.exe，

蓝桥杯VIP题目与全套测试数据

设计（论文）内容：1.主要内容和技术指标 系统开发背景、系统概述、需求分析、系统设计、功能、感受与体会等。其中需求分析中主要对系统的数据流程图进行了详细描绘。2.任务与要求完成货物类型、商品类型、货物入库、货物出库、库存等的全过程管理，包括添加入库、出库等，添加、修改和删除出库入库记录，修改、删除库存信息，查看出库入库情况和货物数量

ARM开发环境MDK目前最新版V5.26注册机Keygen，这个注册机支持当前的所有版本，包括当前最新的5.26，而且使用这个注册机，不再需要注册RL-ARM，就可以直接使用MDK中带的emWin。该工具仅供广大学习爱好者学习使用，学习结束后请主动删除工具，请勿用于商业用途，如果觉得开发环境对你用处很大，鼓励大家学习后购买官方开发环境使用。本人亲测V5.26成功激活。特别提醒：使用该工具时，MDK必需使用管理员权限运行，否则会失败。

【实例简介】关于matlab椭圆拟合的源代码，根据给出的椭圆边界上的点坐标拟合整个椭圆的边界

matlab雷电过电压。该程序是在计算电力系统输电线路上由于雷电冲击在避雷线上而在其他三相上产生的雷电过电压程序

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