多情境感知环境下RFID复合事件检测算法

无线射频识别(Radio frequency identification,RFID)技术的发展让感知世界变得更加便利。本文针对RFID数据特点以事件为中心进行数据建模，在多约束环境下利用各种规则和模式，有效地检测出特定的复杂事件。通过对RFID事件的分析和处理，利用抽象的底层RFID事件的检测对复杂事件进行有效监控和处理。根据Cascadia系统对RFID数据的事件分类与检测给出了利用事件解析图的事件检测方法。提出了在不同的约束执行环境中各操作的事件检测算法，结合具体应用实例对采用事件解析图的RFID复杂事件检测模型进行了解释说明。实验结果表明本文提出的RFID复杂事件检测算法能够较好地满足正确性要求，并提高了RFID系统整体的执行效率。

Operation and Detection Algorithm of Composite Event of RFID in Multi-ontext Aware Environment

With the development of radio frequency identification (RFID) technology, RFID data processing technique grows rapidly in demand in the multi-context aware environment. According to the characteristics of RFID data, the event-centric event model is built. Composite events are abstracted by analyzing and processing the raw RFID data. And then the abstract low events can be monitored by RFID event detection. With the base of event specifying and detecting of RFID data in Cascadia, the integrated event operators and the main idea of detection algorithms are given based on event parsed tree. The detailed event detection algorithms are presented in the different constraint executing circumstances. The theoretic analyses of the algorithms are also given accordingly. Furthermore, the RFID composite event detection model using event parse graph is explained by the applied examples. The experimental results indicate the efficiency and effectiveness of the algorithms in three varied constraint environments in RFID data management.