Abstract: With industrial/scientific/medical (ISM) band radio frequency (RF) products, often Times users are new to the structure of Maxim's low pin-count transmitters andfully integrated superheterodyne receivers. This tutorial provides simple steps that can be taken to get the best performance out of these transmitters and receivers whileproviding techniques to measure the overall capability of the design.
上传时间： 2013-11-02
上传用户：yph853211
针对UHF读写器设计中，在符合EPC Gen2标准的情况下，对标签返回的高速数据进行正确解码以达到正确读取标签的要求，提出了一种新的在ARM平台下采用边沿捕获统计定时器数判断数据的方法，并对FM0编码进行解码。与传统的使用定时器定时采样高低电平的FM0解码方法相比，该解码方法可以减少定时器定时误差累积的影响；可以将捕获定时器数中断与数据判断解码相对分隔开，使得中断对解码影响很小，实现捕获与解码的同步。通过实验表明，这种方法提高了解码的效率，在160 Kb/s的接收速度下，读取一张标签的时间约为30次/s。 Abstract: Aiming at the requirement of receiving correctly decoded data from the tag under high-speed communication which complied with EPC Gen2 standard in the design of UHF interrogator， the article introduced a new technology for FM0 decoding which counted the timer counter to judge data by using the edge interval of signal capture based on the ARM7 platform. Compared with the traditional FM0 decoding method which used the timer timed to sample the high and low level， the method could reduce the accumulation of timing error and could relatively separate capture timer interrupt and the data judgment for decoding， so that the disruption effect on the decoding was small and realizd synchronization of capture and decoding. Testing result shows that the method improves the efficiency of decoding， at 160 Kb/s receiving speed， the time of the interrogator to read a tag is about 30 Times/s.
上传时间： 2013-11-10
上传用户：liufei
This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several Times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 图Figure 1. Local Safety System
上传时间： 2013-11-14
上传用户：zoudejile
Abstract: This application note explains how to design an intelligent lighting controller that senses and measures the ambient lightlevel with an ambient light sensor (ALS). Equipped with a real-time clock (RTC), the controller also knows when to turn lighting on oroff at specified Times. The system presented in this document can be used to control all luminaires that are mains-supply operated.Controller software is also provided in hex format.
上传时间： 2013-11-18
上传用户：AbuGe
随机性发生器、冒泡分类和混洗一组12张牌的演示程序。 Demonstrates the use of a randomizer, bubble-sort and an array to "shuffle" a deck of 12 cards. I put it here for those of you who are trying to figure out how to shuffle with a randomizer without having the same card appear two-or-more Times.
标签： Demonstrates bubble-sort randomizer array
上传时间： 2014-01-16
上传用户：zhanditian
解决时钟问题，acm竞赛题 A weird clock marked from 0 to 59 has only a minute hand. It won t move until a special coin is thrown into its box. There are different kinds of coins as your options. However once you make your choice, you cannot use any other kind. There are infinite number of coins of each kind, each marked with a number d ( 0 <= 1000 ), meaning that this coin will make the minute hand move d Times clockwise the current time. For example, if the current time is 45, and d = 2. Then the minute hand will move clockwise 90 minutes and will be pointing to 15. Now you are given the initial time s ( 0 <= s <= 59 ) and the coin s type d. Write a program to find the minimum number of d-coins needed to turn the minute hand back to 0.
标签： 时钟
上传时间： 2015-05-21
上传用户：rishian
C-C方法及改进的C-C方法重构相空间的matlab程序 -------------------------------- 性能： 3000数据耗时3分钟 -------------------------------- 参考文献： 1、Nonlinear dynamics, delay Times, and embedding windows.pdf 2、基于改进的C-C方法的相空间重构参数选择4.pdf -------------------------------- 文件夹说明： 1、C_C_Method_luzhenbo2.m - 程序主文件，直接运行此文件即可! 2、LorenzData.dll - 产生Lorenz离散数据 3、DuffingData.dll - 产生Duffing离散数据 4、RosslerData.dll - 产生Rossler离散数据 5、ccFunction.dll - 计算S(m,N,r,t) - 原C-C方法中计算S(m,N,r,t)，改进的C-C方法中计算S2(m,N,r,t) 6、ccFunction_luzhenbo.dll - 计算S(m,N,r,t) - 改进的C-C方法中计算S1(m,N,r,t) -------------------------------- 致谢： 此稿本次修改的部分灵感来源于与研学论坛网友“张文鸽”和“yangfanboy”的讨论，在此表示感谢!
上传时间： 2015-06-08
上传用户：lo25643
LibTorrent is a BitTorrent library written in C++ for *nix, with a focus on high performance and good code. The library differentiates itself from other implementations by transfering directly from file pages to the network stack. On high-bandwidth connections it is able to seed at 3 Times the speed of the official client. The client uses ncurses and is ideal for use with screen or dtach. It supports saving of sessions and allows the user to add and remove torrents.
标签： performance LibTorrent BitTorrent library
上传时间： 2015-07-24
上传用户：冇尾飞铊
By Tom Christiansen and Nathan Torkington ISBN 1-56592-243-3 First Edition, published August 1998. (See the catalog page for this book.) Search the text of Perl Cookbook. Table of Contents Copyright Page Foreword Preface Chapter 1: Strings Chapter 2: Numbers Chapter 3: Dates and Times Chapter 4: Arrays Chapter 5: Hashes Chapter 6: Pattern Matching Chapter 7: File Access Chapter 8: File Contents Chapter 9: Directories Chapter 10: Subroutines Chapter 11: References and Records Chapter 12: Packages, Libraries, and Modules Chapter 13: Classes, Objects, and Ties Chapter 14: Database Access Chapter 15: User Interfaces Chapter 16: Process Management and Communication Chapter 17: Sockets Chapter 18: Internet Services Chapter 19: CGI Programming Chapter 20: Web Automation Index Colophon
标签： Christiansen Torkington published Edition
上传时间： 2014-02-20
上传用户：yyq123456789
* CONSTRAINTS * This module does not handle data which is considered out of range by the * application(i.e. fixed constants which represent error condition) * * Maximum weight value must be limited to 128 to prevent an overflow * condition during the calculation. * * The internal data type must be large enough to handle the calculations. * The maximum possible internal value * = Max Input Value * (weight - 1) + Max Input Value * If a maximum weight of 128 is used, the internal data type should be 2 * Times the size of the input data type.
标签： CONSTRAINTS considered module handle
上传时间： 2015-09-07
上传用户：qunquan
