利用FIFO先进先出算法实现分页请求，先进先出
上传时间： 2019-12-01
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The objective of this book is to allow the reader to predict the received signal power produced by a particular radio transmitter. The first two chapters examine propagation in free space for point-to-point and point-to-area transmission, respectively. This is combined with a dis- cussion regarding the characteristics of antennas for various purposes. In chapter 3, the effect of obstacles, whether buildings or mountains, is discussed and analytical methods, whereby the strength of a signal is the shadow of an obstacle can be predicted, are presented.
标签： Propagation Essentials Radio Wave of
上传时间： 2020-05-27
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The use of optical free-space emissions to provide indoor wireless commu- nications has been studied extensively since the pioneering work of Gfeller and Bapst in 1979 [1]. These studies have been invariably interdisciplinary in- volving such far flung areas such as optics design‚ indoor propagation studies‚ electronics design‚ communications systems design among others. The focus of this text is on the design of communications systems for indoor wireless optical channels. Signalling techniques developed for wired fibre optic net- works are seldom efficient since they do not consider the bandwidth restricted nature of the wireless optical channel.
标签： Communication Wireless Optical Systems
上传时间： 2020-06-01
上传用户：shancjb
Sound is simply an airborne version of vibration. The air which carries sound is a mixture of gases. In gases, the molecules contain so much energy that they break free from their neighbors and rush around at high speed. As Figure 1.1(a) shows, the innumerable elastic collisions of these high-speed molecules produce pressure on the walls of any gas container. If left undisturbed in a container at a constant temperature, eventually the pressure throughout would be constant and uniform.
标签： Engineering Audio
上传时间： 2020-06-09
上传用户：shancjb
Computer science as an academic discipline began in the 1960’s. Emphasis was on programming languages, compilers, operating systems, and the mathematical theory that supported these areas. Courses in theoretical computer science covered finite automata, regular expressions, context-free languages, and computability. In the 1970’s, the study of algorithms was added as an important component of theory. The emphasis was on making computers useful. Today, a fundamental change is taking place and the focus is more on a wealth of applications. There are many reasons for this change. The merging of computing and communications has played an important role. The enhanced ability to observe, collect, and store data in the natural sciences, in commerce, and in other fields calls for a change in our understanding of data and how to handle it in the modern setting. The emergence of the web and social networks as central aspects of daily life presents both opportunities and challenges for theory.
标签： Foundations Science Data of
上传时间： 2020-06-10
上传用户：shancjb
Xilinx FPGA Virtex-7 全系列（AD集成封装库），IntLib后缀文件，PCB封装带3D视图，拆分后文件为PcbLib+SchLib格式，Altium Designer原理图库+PCB封装库，集成封装型号列表：Library Component Count : 157Name Description----------------------------------------------------------------------------------------------------XC7V2000T-1FHG1761C Virtex-7 FPGA, 1200 User I/Os, 36 GTX, 1760-Ball BGA, Speed Grade 1, Commerical Grade, Pb-FreeXC7V2000T-1FHG1761I Virtex-7 FPGA, 1200 User I/Os, 36 GTX, 1760-Ball BGA, Speed Grade 1, Industrial Grade, Pb-FreeXC7V2000T-1FLG1925C Virtex-7 FPGA, 1200 User I/Os, 16 GTX, 1924-Ball BGA, Speed Grade 1, Commercial Grade, Pb-FreeXC7V2000T-1FLG1925I Virtex-7 FPGA, 1200 User I/Os, 16 GTX, 1924-Ball BGA, Speed Grade 1, Industrial Grade, Pb-FreeXC7V2000T-2FHG1761C Virtex-7 FPGA, 1200 User I/Os, 36 GTX, 1760-Ball BGA, Speed Grade 2, Commerical Grade, Pb-FreeXC7V2000T-2FLG1925C Virtex-7 FPGA, 1200 User I/Os, 16 GTX, 1924-Ball BGA, Speed Grade 2, Commercial Grade, Pb-FreeXC7V2000T-2GFHG1761EVirtex-7 FPGA, 1200 User I/Os, 36 GTX, 1760-Ball BGA, Speed Grade 2G, Extended Grade, Pb-FreeXC7V2000T-2GFLG1925EVirtex-7 FPGA, 1200 User I/Os, 16 GTX, 1924-Ball BGA, Speed Grade 2G, Extended Grade, Pb-FreeXC7V2000T-2LFHG1761EVirtex-7 FPGA, 1200 User I/Os, 36 GTX, 1760-Ball BGA, Speed Grade 2L, Extended Grade, Pb-FreeXC7V2000T-2LFLG1925EVirtex-7 FPGA, 1200 User I/Os, 16 GTX, 1924-Ball BGA, Speed Grade 2L, Extended Grade, Pb-FreeXC7V585T-1FFG1157C Virtex-7 FPGA, 850 User I/Os, 20 GTX, 1156-Ball BGA, Speed Grade 1, Commercial Grade, Pb-FreeXC7V585T-1FFG1157I Virtex-7 FPGA, 850 User I/Os, 20 GTX, 1156-Ball BGA, Speed Grade 1, Industrial Grade, Pb-FreeXC7V585T-1FFG1761C Virtex-7 FPGA, 850 User I/Os, 36 GTX, 1760-Ball BGA, Speed Grade 1, Commercial Grade, Pb-FreeXC7V585T-1FFG1761I Virtex-7 FPGA, 850 User I/Os, 36 GTX, 1760-Ball BGA, Speed Grade 1, Industrial Grade, Pb-FreeXC7V585T-2FFG1157C Virtex-7 FPGA, 850 User I/Os, 20 GTX, 1156-Ball BGA, Speed Grade 2, Commercial Grade, Pb-FreeXC7V
上传时间： 2021-12-22
上传用户：aben
Xilinx FPGA Artix-7 全系列（AD集成封装库），IntLib后缀文件，PCB封装带3D视图，拆分后文件为PcbLib+SchLib格式，Altium Designer原理图库+PCB封装库，集成封装型号列表：Library Component Count : 48Name Description----------------------------------------------------------------------------------------------------XC7A100T-1CSG324C Artix-7 FPGA, 210 User I/Os, 0 GTP, 324-Ball BGA, Speed Grade 1, Commercial Grade, Pb-FreeXC7A100T-1CSG324I Artix-7 FPGA, 210 User I/Os, 0 GTP, 324-Ball BGA, Speed Grade 1, Industrial Grade, Pb-FreeXC7A100T-1FGG484C Artix-7 FPGA, 285 User I/Os, 4 GTP, 484-Ball BGA, Speed Grade 1, Commercial Grade, Pb-FreeXC7A100T-1FGG484I Artix-7 FPGA, 285 User I/Os, 4 GTP, 484-Ball BGA, Speed Grade 1, Industrial Grade, Pb-FreeXC7A100T-1FGG676C Artix-7 FPGA, 300 User I/Os, 8 GTP, 676-Ball BGA, Speed Grade 1, Commercial Grade, Pb-FreeXC7A100T-1FGG676I Artix-7 FPGA, 300 User I/Os, 8 GTP, 676-Ball BGA, Speed Grade 1, Industrial Grade, Pb-FreeXC7A100T-1FTG256C Artix-7 FPGA, 170 User I/Os, 0 GTP, 256-Ball BGA, Speed Grade 1, Commercial Grade, Pb-FreeXC7A100T-1FTG256I Artix-7 FPGA, 170 User I/Os, 0 GTP, 256-Ball BGA, Speed Grade 1, Industrial Grade, Pb-FreeXC7A100T-2CSG324C Artix-7 FPGA, 210 User I/Os, 0 GTP, 324-Ball BGA, Speed Grade 2, Commercial Grade, Pb-FreeXC7A100T-2CSG324I Artix-7 FPGA, 210 User I/Os, 0 GTP, 324-Ball BGA, Speed Grade 2, Industrial Grade, Pb-FreeXC7A100T-2FGG484C Artix-7 FPGA, 285 User I/Os, 4 GTP, 484-Ball BGA, Speed Grade 2, Commercial Grade, Pb-FreeXC7A100T-2FGG484I Artix-7 FPGA, 285 User I/Os, 4 GTP, 484-Ball BGA, Speed Grade 2, Industrial Grade, Pb-FreeXC7A100T-2FGG676C Artix-7 FPGA, 300 User I/Os, 8 GTP, 676-Ball BGA, Speed Grade 2, Commercial Grade, Pb-FreeXC7A100T-2FGG676I Artix-7 FPGA, 300 User I/Os, 8 GTP, 676-Ball BGA, Speed Grade 2, Industrial Grade, Pb-FreeXC7A100T-2FTG256C Artix-7 FPGA, 170 User I/Os, 0 GTP, 256-Ball BGA, Speed Grade 2, Commercial Grade, Pb-FreeXC7A100T-2FTG256I Artix-7 FPGA, 170 User I/Os, 0 GTP, 2
上传时间： 2021-12-22
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这是介绍蓝牙电话免提协议的最新文档,
上传时间： 2022-02-01
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The PW2601 is a charger front-end integrated circuit designed to provide protection to Li-ionbatteries from failures of charging circuitry. The device monitors the input voltage, battery voltageand the charging current to make sure all three parameters are operated in normal range. Thedevice will switch off internal MOSFET to disconnect IN to OUT to protect load when any of inputvoltage, output current exceeds the threshold. The Over temperature protection (OTP) functionmonitors chip temperature to protect the device. The PW2601 also can protect the system’sbattery from being over charged by monitors the battery voltage continuously. The deviceoperates like a linear regulator, maintaining a 5.1V output with input voltages up to the input overvoltage threshold.The PW2601 is available in DFN-2x2-8L package. Standard products are Pb-free and Halogenfree
标签： pw2601
上传时间： 2022-02-11
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基于LabVIEW2012FPGA模式的数据采集和存储系统摘 要：为了提高数据采集系统精度，减少开发成本，提高开发效率，基于LabVIEW虚拟仪器开发工具研究并设计了一 种数据采集系统。该系统采用FPGA编程模式和网络流技术实现大批量数据实时传输，并对数据进行分析处理和存储。系 统硬件采用美国NI实时控制器CRIO⁃9025，实现16路数据可靠采集与存储。实验仿真及实际运行结果表明该数据采集系 统能够精确地对数据进行实时采集以及分析处理，达到了项目要求。 关键词：FPGA；FIFO；网络流；数据采集系统；SQL数据库 中图分类号：TN98⁃34 文献标识码：A 文章编号：1004⁃373X（2014）14⁃0142⁃04 Data acquisition and storage system based on LabVIEW 2012FPGA pattern WANG Shu⁃dong1,2 ，WEI Kong⁃zhen1 ，LI Xiao⁃pei1 （1. College of Electrical and Information Engineering，Lanzhou University of Technology，Lanzhou 730050，China； 2. Gansu Key Laboratory for Advanced Industrial Process Control，Lanzhou 730050，China）
上传时间： 2022-02-18
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