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| 1 | An Overview of Anti-Collision Protocols for Radio Frequency Identification Devices显示文摘Radio frequency identification(RFID) is a new type of non-contact automatic identification technology.Due to its low energy consumption,low cost,and its adaptability to harsh environments,it has been applied to many fields.In the RFID systems,data collision is inevitable when the reader sends a communication request and multiple tags respond with simultaneous data transmission.Data collision is prone to causing problems such as:identification delay,spectrum resource waste,a decreased system throughput rate,etc.Therefore,an efficient,stable anti-collision protocol is crucial for RFID systems.This research analysed the current research into RFID anticollision protocols and summarised means for its improvement through the mechanism of implementation of different types anticollision protocols.Finally,a new direction is proposed for the future development of RFID anti-collision protocol systems. | QIAN Zhihong WANG Xue | 2014 | China Communications2014，11，11： | 7 |
| 2 | 速度滑冰竞赛中终点摄像系统若干问题分析及处理显示文摘近年我国以成功申办冬奥会为契机,大力推进冰雪运动项目的发展,速度滑冰项目发展迅速,对速度滑冰竞赛提出了更高要求,终点摄像在速度滑冰赛事中逐渐成为必不可少的核心计时设备之一。终点摄像系统与传统计时系统比,有直观、公正、稳定等优点,但在速度滑冰比赛实际操作使用过程中可能会出现:(1)温度与湿度问题;(2)比赛场光线问题;(3)摄像机架设问题;(4)系统调试的问题;(5)发令后不启动问题;(6)发令自启动问题;(7)采集图像的问题;(8)摄像机不摄录或出现摄录卡顿的问题;(9)判定成绩不发送或者多次发送问题等等。本文对上述可能出现的问题进行了剖析与归因并提出了相应的对策。 | 宋瑞琨 康宁 | 2020 | 文体用品与科技2020，0，8： | 0 |
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