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With the rapid development of space technology, more and more spacecrafts have been launched into space. At the same time, the number of space debris increases dramatically and the probability of collision between space debris and spacecrafts arises accordingly. Some evaluation methods should be studied to evaluate the collision effect. According to different collision modes, this paper introduces...
Feature selection is an important method for improving the efficiency and accuracy of text categorization algorithms by removing redundant and irrelevant terms from the corpus.Extensive researches have been done to improve the performance of individual feature selection methods, but not much on their combinations.In this paper, we propose a method of combining multiple feature selection methods by...
We explore the asymptotic performance of existing geographic routing with a utilization of k-hop neighborhood information. The reachability from source to sink improves as we integrate more information into the routing decision. It is observed that the average number of hops required decreases significantly from the 1-hop to 2-hop based searching. This indicates an attractive tradeoff between the...
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