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An improved particle filter algorithm with adaptive process noise variance is proposed for target tracking in binary wireless sensor networks (BWSN). The standard particle filter (SPF) is not fit for target's constant velocity model and has cumulative effect of prediction error. The proposed algorithm adopts real-time updating process noise variance to eliminate the cumulative effect of particle filter...
In wireless sensor networks, it is an important problem to adjust the work time window in each working/sleeping period to save energy under light network loads and decrease the packet delay under heavy network loads. In this paper, we introduce reinforcement learning method into this problem. We discuss the algorithm design method in a simple IEEE 802.15.4 network, where an RL-based adaptive algorithm...
Complex real-time control system is distributed and imposes great challenges for precise time synchronization modeling. This paper presents a component-oriented design strategy that reduces complexity by separating data-related computational parts and time synchronization interaction among components. We introduce a notion of supervisor to discuss how to aggregate individual component's computation...
The GTS real-time bandwidth allocation strategy of IEEE 802.15.4 is modified, where query information from application layer in wireless sensor networks is used. To improve the system adaptability to randomly changed situations, this paper proposes an adaptive real-time bandwidth allocation strategy, which is data-query demand awared. The strategy is based on an optimization framework of reinforcement...
Because of the request of both function and time, the design of real-time control software become complex. This paper discusses a real-time control software design method based on time and function separating mechanism, which constructs two kind of pseudo-code :"function code" and "scheduling code", accompany with two executing engine - function machine and scheduling machine....
Complex control software is heterogeneous and difficult to design. This paper presents a component-based hierarchy modeling strategy that divides the basic computational parts into components and separates interaction among components as pattern. Under the support of hierarchy architecture, component and pattern achieve reuse. We introduce a notion of behavior generator to characterize the property...
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