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In this paper, we first present a classification for existing GPS positioning algorithms based on their features of mathematical operations in the calculating process and the accuracy of the solutions solved. Then we systematically evaluate and compare the performance of GPS algorithms for practical environments. Performance metrics include normalized execution time and the absolute error. We examine...
Based on the analysis of the insufficiencies of the present Chinese matching algorithms, by examining the characteristics of approximately duplicate records, this paper proposes a method of duplicate record cleaning based on a reformative keywords matching algorithm. Experiments show that this method improves Recall and Precision of duplicate record evidently.
A data stream is a massive and unbounded sequence of data elements that are continuously generated at a fast speed. Compared with traditional data mining, knowledge discovery in data streams is more challenging since several requirements need to be satisfied. In this paper we propose a mining algorithm for finding frequent itemsets over a transactional data stream. Unlike most of existing algorithms,...
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