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C嵌入式编程设计模式 源代码
英文名《Design Patterns for Embedded Systems in C》中文名《C嵌入式编程设计模式》这本书的源代码，在百度上一直没找到，跟大家分享了
- 2020-07-02下载
- 积分：1
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软件测试课程设计报告_网上购物系统
软件测试是软件工程中非常重要的环节，是软件质量的保证。该课程是培养训练学生软件质量保证能力的重要实践性教学环节，与软件测试技术课程的教学内容紧密配合，同步进行。通过软件测试的实践训练，深刻理解和掌握软件测试和软件测试过程的基本方法和基本技术，熟练掌握黑盒测试、白盒测试的测试用例的设计，同时进一步提高学生对于复杂程序的编写能力，为学生将来从事实际软件测试工作和进一步深入研究打下坚实的理论基础和实践基础。
- 2020-12-12下载
- 积分：1
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蚁群算法实现的java源代码
实现的是一个蚁群算法，该算法可以用于启发式的任务资源调度，求解多目标非线性规划问题。
- 2020-11-29下载
- 积分：1
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FFT Verilog代码
FFT Verilog代码 进行了分类设计，还有仿真脚本等文件。
- 2020-12-05下载
- 积分：1
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可用于检测图像被篡改位置的脆弱水印
可用于检测图像被篡改位置的脆弱水印matlab实现
- 2020-12-09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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动网格入门专题udf
在学习使用Fluent 的时候，有不少朋友需要使用动网格模型(Dynamic Mesh Model)， 因此，本版推出这个专题，进行大讨论，使大家在使用动网格时尽量少走弯路，更快更好地 掌握；也欢迎使用过的版友积极参与讨论指导，谢谢！ 该专题主要包括以下的主要内容：
- 2020-12-09下载
- 积分：1
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安卓学生信息管理app
用Android studio 开发的学生信息管理app 源代码 课设报告
- 2021-05-06下载
- 积分：1
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红蜘蛛黑客工具箱 入侵工具大全
数十种黑客入侵工具...绝对好用 希望童鞋们好好学习利用 不要违法乱纪.....
- 2020-11-30下载
- 积分：1
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信号调制识别论文（含matlab程序）
较为完整的信号调制识别的论文，含全部的matlab实现程序。
- 2020-11-28下载
- 积分：1
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