排序方式: 共有12条查询结果,搜索用时 203 毫秒
1.
2.
3.
4.
Community detection methods have been used in computer, sociology, physics, biology, and brain information science areas. Many methods are based on the optimization of modularity. The algorithm proposed by Blondel et al. (Blondel V D, Guillaume J L, Lambiotte R and Lefebvre E 2008 J. Star. Mech. 10 10008) is one of the most widely used methods because of its good performance, especially in the big data era. In this paper we make some improvements to this algorithm in correctness and performance. By tests we see that different node orders bring different performances and different community structures. We find some node swings in different communities that influence the performance. So we design some strategies on the sweeping order of node to reduce the computing cost made by repetition swing. We introduce a new concept of overlapping degree (OV) that shows the strength of connection between nodes. Three improvement strategies are proposed that are based on constant OV, adaptive OV, and adaptive weighted OV, respectively. Experiments on synthetic datasets and real datasets are made, showing that our improved strategies can improve the performance and correctness. 相似文献
5.
宽带网的安全研究工作,在今后两三年内将成为网络安全的主流技术。今后几年的网络环境和手段将会发生很大的变化。那时,2000 MHz微处理器,1G内存和50G硬盘的计算机,可接上千兆以太网或十兆无线网络,在家中可用一兆以上速度的电话或电视网络上网。凭借如此卓越的微处理器、内存、硬盘和带宽,许多今天不可能的事情将变得可能,更多今天只能演示的技术将成为主流。 相似文献
6.
7.
8.
This paper focuses on how to improve aspect-level opinion mining for online customer reviews. We first propose a novel generative topic model, the Joint Aspect/Sen-timent (JAS) model, to jointly extract aspects and aspect-dependent sentiment lexicons from online customer reviews. An as-pect-dependent sentiment lexicon refers to the aspect-specific opinion words along with their aspect-aware sentiment polarities with respect to a specific aspect. We then apply the extracted aspect- dependent sentiment lexi-cons to a series of aspect-level opinion mining tasks, including implicit aspect identification, aspect-based extractive opinion summarization, and aspect-level sentiment classification. Experimental results demonstrate the effectiveness of the JAS model in learning aspect- dependent sentiment lexicons and the practical values of the extracted lexicons when applied to these practical tasks. 相似文献
9.
10.
利用链接分析技术提高搜索引擎查找质量的研究 总被引:6,自引:0,他引:6
文章对链接分析技术在搜索引擎的页面排名中的应用进行了深入细致的研究,对google的利用链接分析的页面排名算法PageRank算法进行了改进,并将其应用到我们自己的搜索引擎中,给出了它在提高查找质量的页面排名中的具体应用策略。 相似文献