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A Space State Forecast Model for Dam Construction Equipments Based on Analysis Prediction Theory
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作者 WU Qingming CHEN Yongqiang ZHANG Zhiqiang 《Wuhan University Journal of Natural Sciences》 CAS 2007年第2期307-310,共4页
Anti-collision equipments system is developed to solve the collision problems of dam construction equipments, and in the system the determination of equipments' space state is important. A uniform moving equation of ... Anti-collision equipments system is developed to solve the collision problems of dam construction equipments, and in the system the determination of equipments' space state is important. A uniform moving equation of equipments is established based on the analysis prediction theory and the movements states of equipments. Method of least square was employed to deal with discrete data of equipments' space position. Fitting equation matched with the movement equation was presented to do data fitting, and a relevant algorithm was given. Applying the fitting equation, current and future space state of equipments can be accurately predicted. Finally, a case is given and results show that numerical values of data were steady and their precision was high. In LongTan dam construction of the equipments antiollision system, applying this method to forecast the equipments' space states and practical running of the system indicate that this method can improve the precision of position, obtain the better forecasting effect and increase the robustness of the system. 展开更多
关键词 construction equipments analysis prediction anticollision system method of least square
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An Overview of Anti-Collision Protocols for Radio Frequency Identification Devices 被引量:8
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作者 QIAN Zhihong WANG Xue 《China Communications》 SCIE CSCD 2014年第11期44-59,共16页
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 f... 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. 展开更多
关键词 radio frequency identification automatic identification data collision anticollision protocol.
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