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Wireless sensor networks for rarely occurring critical events must maintain sensing coverage and low latency network connectivity to ensure event detection and subsequent rapid propagation of notification messages. Existing geographic forwarding algorithms have proved successful in providing energy efficient network connectivity for arbitrary topologies where sensing coverage is not guaranteed. This...
The Calibration Device is used to measure the time delay difference between the transmission and receiving paths inside Two-Way Satellite Time and Frequency Transfer (TWSTFT) earth station, it can improve the time comparison precision. A new calibration device for TWSTFT has been developed recently at Beijing Institute of Radio Metrology and Measurement (BIRMM). The signal paths inside calibration...
By QoE (Quality of Experience) assessment, this paper investigates the influences of network delay on will transmission about movement direction by using haptic sensation in two types of collaborative work. In the first work, two users move a pencil cooperatively to a target in a real space. In the second work, the users conduct similar work in a 3-D virtual space to that in the real space. Assessment...
Avoiding use of traditional high-speed analog-to digital converters (ADCs) and constant fraction discriminators, multi-voltage threshold (MVT) method is able to digitally sample positron emission tomography (PET) scintillation pulse with reasonable cost. As the key component of the MVT method, a time-to-digital convertor (TDC) with high resolution and large dynamic range is presented in this work...
Implementation of a control networks will induce time varying or stochastic time delays that inevitably degrade performance and could be a source of instability to networked control systems. The interaction of the control networks and timing characteristics should be investigated in order to more effectively utilize the networked control systems. In this paper, a detailed discussion of the characteristics...
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