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基于Java的SNMP网络管理系统
Java技术改变了建立和部署应用程序的方法，为网络管理提供了新的手段。本设计是将 Web服务技术应用于网络管理中，提出一个通用的分布式与集中式相结合的网络管理系统模型。在实现其基本功能的同时运用Java技术建立并部署应用程序，采用封装技术提高系统的扩展性和灵活性。基于用户界面层、中间层和存储层的3层体系结构，设计并实现该网络管理系统。本设计基于简单网络管理协议(Simple Network Management Protocol, SNMP)，应用Java语言设计并实现了具有高效率高可用性的网络管理系统。
- 2020-12-03下载
- 积分：1
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webrtc 资源合集
基本上包括了目前的webrtc学习书籍： 6,044,382 2. Learning WebRTC.pdf1,335,378 3. Getting Started with WebRTC.pdf25,048,882 4. Real-Time Communication with WebRTC.pdf5,948,908 5. WebRTC Cookbook.pdf64,176,082 596767 Learning WebRTC中文版-用WebRTC开发交互实时通信应用.pdf90,404,609 WebRTC权威指南.pdf
- 2021-05-06下载
- 积分：1
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BP 神经网络程序BP 神经网络程序
BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序BP 神经网络程序
- 2020-12-05下载
- 积分：1
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MATLAB下人脸图像的PCA重构
MATLAB下人脸图像的PCA重构，用matlab实现，代码完整高效。
- 2020-12-11下载
- 积分：1
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标记分水岭分割算法的matlab实现
应用标记符控制分水岭分割 有效解决了分水岭算法在图像分割中的过分割问题
- 2020-12-10下载
- 积分：1
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ieee10机39节点系统数据
ieee10机39节点系统数据，主要是BPA数据！
- 2020-12-04下载
- 积分：1
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复数矩阵求逆
使用C代码编写的复数矩阵求逆的Ｃ代码。已经和matlab结果做出对比，无误
- 2021-05-06下载
- 积分：1
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最小二乘法对未知节点进行定位
最小二乘法对未知节点进行定位 matlab代码
- 2020-11-27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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北邮 计算机网络 滑动窗口协议 选择重传协议 go-back-n协议 实验报告与配套代码
北邮 计算机网络课程实验 滑动窗口协议 选择重传协议与go-back-n协议 压缩包内附实验报告与配套代码
- 2020-12-05下载
- 积分：1
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