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We study result diversification in continuous spatial query processing and formulate a new type of queries, the moving k diversified nearest neighbor query (MkDNN). Given a moving query object, an MkDNN query maintains continuously the k diversified nearest neighbors of the query object. Here, how diversified the nearest neighbors are is defined on the distance between the nearest neighbors. We propose...
Earth Mover’s Distance (EMD) evaluates the similarity between probability distributions, known as a robust measure more consistent with human similarity perception than traditional similarity functions. EMD-based similarity join retrieves pairs of probability distributions with EMD below a specified threshold, supporting many important applications, such as duplicate image retrieval and sensor pattern...
In this paper, we focus on the relay assignment issue in an ad-hoc network environment. Our objective is to improve the total capacity of all users randomly located in an area. We designed two distributed algorithms, Distributed Game-theoretic Relay Assignment (DGRA) and Distributed Fast-converge Relay Assignment (DFRA), which can achieve correlated equilibrium (CE) and low time complexity respectively...
In this paper, we address the problem of lifetime maximization under coverage and connectivity requirements for heterogeneous wireless sensor networks where different targets need to be covered (sensed ) by different types of wireless sensors running at possibly different sampling rates as well as different initial energy reserve. The problem is particularly challenging since we need to consider both...
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