Complex event processing (CEP) can extract meaningful events for real-time locating system (RTLS) applications. To identify complex event accurately in RTLS, we propose a new RFID complex event processing method GEEP,...Complex event processing (CEP) can extract meaningful events for real-time locating system (RTLS) applications. To identify complex event accurately in RTLS, we propose a new RFID complex event processing method GEEP, which is based on the timed automata (TA) theory. By devising RFID locating application into complex events, we model the timing diagram of RFID data streams based on the TA. We optimize the constraint of the event streams and propose a novel method to derive the constraint between objects, as well as the constraint between object and location. Experiments prove the proposed method reduces the cost of RFID complex event processing, and improves the efficiency of the RTLS.展开更多
The problem of variable sampling time interval which appears in application of Kalman Filtering is analyzed and the corresponding filtering process with or without present transition matrix is suggested, then an appli...The problem of variable sampling time interval which appears in application of Kalman Filtering is analyzed and the corresponding filtering process with or without present transition matrix is suggested, then an application experiment for astronomical surveying is introduced. In this process, the known stochastically variable sampling time intervals play the roles as deterministic input sequences of the state-space description, and the corresponding matrix and (if needed) state transition matrix can be established by performing real-time and structure-linear system identification.展开更多
物联网(Internet of Things)是在信息技术、网络技术、传感技术、射频标识技术以及传输标准等基础上发展起来的。实时远程作业中心RTOC(Real Time Operation Center)又称实时远程专家支持中心,是石油钻探物联网技术的产物,是物联网技术...物联网(Internet of Things)是在信息技术、网络技术、传感技术、射频标识技术以及传输标准等基础上发展起来的。实时远程作业中心RTOC(Real Time Operation Center)又称实时远程专家支持中心,是石油钻探物联网技术的产物,是物联网技术在石油钻探领域的典型应用。目前,实时远程作业中心正在国内石油钻探行业逐步兴起。国外石油公司早在上世纪末起步,成熟应用已超过十年,应用效果十分明显。实时远程作业中心能为钻井现场提供实时、高效、多学科、跨专业的技术支持,大大提高钻井效率。为了深入认识这一领域的发展,本文就RTOC的设计建设予以综合阐述和前景展望。展开更多
文摘Complex event processing (CEP) can extract meaningful events for real-time locating system (RTLS) applications. To identify complex event accurately in RTLS, we propose a new RFID complex event processing method GEEP, which is based on the timed automata (TA) theory. By devising RFID locating application into complex events, we model the timing diagram of RFID data streams based on the TA. We optimize the constraint of the event streams and propose a novel method to derive the constraint between objects, as well as the constraint between object and location. Experiments prove the proposed method reduces the cost of RFID complex event processing, and improves the efficiency of the RTLS.
文摘The problem of variable sampling time interval which appears in application of Kalman Filtering is analyzed and the corresponding filtering process with or without present transition matrix is suggested, then an application experiment for astronomical surveying is introduced. In this process, the known stochastically variable sampling time intervals play the roles as deterministic input sequences of the state-space description, and the corresponding matrix and (if needed) state transition matrix can be established by performing real-time and structure-linear system identification.
文摘物联网(Internet of Things)是在信息技术、网络技术、传感技术、射频标识技术以及传输标准等基础上发展起来的。实时远程作业中心RTOC(Real Time Operation Center)又称实时远程专家支持中心,是石油钻探物联网技术的产物,是物联网技术在石油钻探领域的典型应用。目前,实时远程作业中心正在国内石油钻探行业逐步兴起。国外石油公司早在上世纪末起步,成熟应用已超过十年,应用效果十分明显。实时远程作业中心能为钻井现场提供实时、高效、多学科、跨专业的技术支持,大大提高钻井效率。为了深入认识这一领域的发展,本文就RTOC的设计建设予以综合阐述和前景展望。
