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在MacroFemtocell异构网络基于能效优化的子载波分配
异构网络资源分配蝙蝠算法能量效率(energy efficiency,EE)成为衡量网络性能新的指标,最大化网络能效已成为通信技术的研究热点.针对Macro/Femtocell异...
- 2021-05-07下载
- 积分：1
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TMS320C6416 烧写程序及工具
说明： DSP flash 烧写工具，包括FBTC程序、Flashburn程序，和代码转换工具 PS：相当棒的程序，但是由于身边的开发板是非官方开发板，所以目前的程序还没有调试成功，但是所有的都是基于此程序的。
- 2020-12-04下载
- 积分：1
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C#编写的SVG文件编辑器，包含代码和执行程序
C#开发的一个简单的SVG文件编辑器，可以创建、编辑SVG文件，编辑器可以添加各种图层、形状并修改属性。SVG文件的一些基本操作。
- 2020-11-27下载
- 积分：1
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基于四层电梯控制器的设计报告
VHDL语言编写四层电梯控制器，里面有主程序，代码还有实验报告，完整版，可以实现现实电梯的所用功能。
- 2020-12-11下载
- 积分：1
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Bicomb文献分析软件
书目共现分析系统来自中国医科大学医学信息学系。用于处理从书目数据库（如PubMed、SCI、CNKI、万方等）下载下来的文献记录，具体功能包括：抽取其中特定的字段，如作者、期刊名、标题、发表年代、引文等统计相应字段的出现频次按照一定的阈值截取高频条目后，形成共现矩阵和条目-来源文献矩阵（如高频词-论文矩阵）输出高频条目和矩阵所形成的矩阵可以用于进一步的聚类分析和网络分析
- 2020-05-31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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建模论文（五一建模比赛）
五一建模写的论文，当时是拿啦奖的，你们可以参考下哦
- 2020-12-11下载
- 积分：1
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数字图像处理matlab GUI设计
建立基于Matlab的GUI界面，通过菜单选择来实现；图像处理基本功能，包括：“打开”，“保存”，“退出”功能；图像点运算，包括：灰度直方图，灰度线性变换，阈值变换和直方图均衡化；图像几何运算，包括：平移，水平和垂直镜像，旋转和缩放；图像空间域增强，包括：图像平滑（均值滤波，中值滤波），图像锐化（Robert算子，Sobel算子，拉普拉斯算子）。
- 2021-05-06下载
- 积分：1
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ps2键盘驱动程序
PS2键盘驱动程序全部代码都已经实现,学习PS2的参考代码
- 2020-12-12下载
- 积分：1
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广工软件系统设计与体系结构
Git的使用，使用Eclipse进行Web开发，期末论文（简易博客系统）
- 2020-11-30下载
- 积分：1
