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Gathering data from sensors, mobile sink has been adopted in wireless sensor networks (WSN) and wireless sensor and actor network(WSAN) to achieve higher efficiency. With the help of mobile sink, sensors could attain a much longer lifetime than the past. However, mobile sink introduces new challenges such as large data gathering latency to WSN/WSAN. A lot of research efforts have been devoted to reduce...
This paper presents a simulation algorithm to analyze a type of colored time Petri nets, in which a time interval is associated with each transition. Specifically, we first unfold colored time Petri nets to standard time Petri nets and then develop a simulation algorithm of time Petri nets to realize the simulation of colored time Petri nets. A model of a real system is used to demonstrate and validate...
Based on analyzing the traditional image matching algorithms, a fast image matching method, which integrates improved sequential similarity detection algorithm (SSDA) and wavelet transformation, is presented in this paper. Firstly, some basic principles of SSDA image matching and wavelet transformation are introduced. Secondly, according to the shortcoming of traditional SSDA algorithm, a new SSDA...
In order to improve the poor accuracy and stability of the traditional geomagnetic matching navigation by TERCOM, In this paper, we discuss a new method which is based on the integration of TERCOM, K-means clustering algorithm and INS (inertial navigation system) in detail. Through an experiment, we find that the new method has higher accuracy and stability than the traditional method, especially...
Based on the current situation of underwater navigation, this paper presents an underwater topographic matching navigation method which is the integration of TERCOM and MCTM algorithm. First of all, we use the TERCOM to acquire a rough position of vehicle. Secondly, a search area is found according to TERCOM positioning result. The multi-contour matching algorithm is implemented in the area. The algorithm...
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