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纯JAVA中国天气网天气预报抓取解析存MYSQL程序（原创）
【实例简介】将中国天气网近六天（因为有些城市提供的接口只有五天数据，所以我暂时取5天，程序里依然是六天的标准）的天气情况抓取，用JSON解析，存入数据库，数据库是两张表，城市表和天气表。程序可以运行，两个表都能读入数据，城市表大致读入了423行数据，天气表大致读入了1800行数据。程序的缺点在于，暂时还没写注释，面向对象还未体现，没有实现每天定时抓取的性能，需要人工每天手动运行程序抓取数据。。。。。
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- 积分：1
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DUI Designer
duilib主打的界面制作方式是XML + UI引擎 + win32框架，其实和浏览器HTML + CSS + 渲染引擎的方式非常类似，可以将其理解为一个非常mini的浏览器
- 2021-05-15 14:30:02下载
- 积分：1
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网上预约挂号系统设计报告
目录：1.体系结构 31.1体系结构 31.１.１B/S体系结构 31.2系统运行环境 31.2.1 网络结构图 31.2.2 硬件环境 31.2.3软件环境 32.界面设计 42.1后台界面设计 42.2前台界面计 63.数据模型 63.1数据库的概念结构模型设计 63.2数据库的逻辑结构模型设计 63.3数据库管理物理结构模型设计 84.模块设计 94.1病人登录端模块设计 124.1.1表示层设计 124.1.2控制层 144.2管理员登录模块设计 144.2.1表示层设计 144.2.2控制层 154.3专家查询模块设计 164.3.1表示
- 2020-11-30下载
- 积分：1
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多服务台混合制排队论
多服务台混合制排队论的MATLAB仿真，可以自己设置服务台数，系统容量，到达概率，服务台效率等。最后可以输出系统繁忙概率，平均等待时间，以及各种图表
- 2020-11-28下载
- 积分：1
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pcie中文详解
超级详细的pcie中文文档
- 2020-11-03下载
- 积分：1
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软件设计方案模板.doc
针对软件项目制定的，软件设计方案模板。简单实用，条目既齐全，又不会繁琐。符合实际，可以直接在工作中使用。
- 2021-05-06下载
- 积分：1
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剪切波变换MATLAB实现代码
剪切波变换MATLAB实现代码，包含2D及3D图片的，还有对应的反变换代码
- 2020-11-28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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高级专家系统：原理、设计及应用
仅供学习交流使用
- 2020-12-10下载
- 积分：1
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C++ Primer 第五版 包括第五版中文高清版附带目录书签、第五版英文文字版带目录书签、第五版的代码以及课后答案，直接下载，非百度云
C++ Primer 第五版 包括第五版中文高清版附带目录书签、第五版英文文字版带目录书签、第五版的代码以及课后答案
- 2021-05-06下载
- 积分：1
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