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一种面向多维复杂网络的节点传播重要性算法 被引量:2
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作者 张昕 王慧慧 +1 位作者 严沛 郭阳 《计算机科学》 CSCD 北大核心 2019年第S11期348-353,共6页
如何度量节点在网络拓扑结构中的重要程度,一直是复杂网络相关领域中的研究热点。现有的研究大多面向单维网络,针对现实网络结构往往是多维共存的问题,提出了维度相似性的定义来度量各维度间的关系。考虑实际信息传播过程中信息衰减对... 如何度量节点在网络拓扑结构中的重要程度,一直是复杂网络相关领域中的研究热点。现有的研究大多面向单维网络,针对现实网络结构往往是多维共存的问题,提出了维度相似性的定义来度量各维度间的关系。考虑实际信息传播过程中信息衰减对节点重要性的影响,给出传播衰减率的定义,并通过全连接单维网络传播无损假设及对应算法确定衰减系数取值。进一步给出节点重要性的计算方法,在算法中利用复杂网络小世界特性,限定最长传播跳数,使得算法兼顾时间效率与精确度。在真实网络上进行了验证,实验结果表明,与传统的节点度以及节点介数方法相比,该算法在精确度与时间效率方面均具有一定优势。 展开更多
关键词 网络 节点重要性 维度相似性 衰减系数 最长传播跳数
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Design of similarity measure for discrete data and application to multi-dimension 被引量:1
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作者 LEE Myeong-ho 魏荷 +2 位作者 LEE Sang-hyuk LEE Sang-min SHIN Seung-soo 《Journal of Central South University》 SCIE EI CAS 2013年第4期982-987,共6页
Similarity measure design for discrete data group was proposed. Similarity measure design for continuous membership function was also carried out. Proposed similarity measures were designed based on fuzzy number and d... Similarity measure design for discrete data group was proposed. Similarity measure design for continuous membership function was also carried out. Proposed similarity measures were designed based on fuzzy number and distance measure, and were proved. To calculate the degree of similarity of discrete data, relative degree between data and total distribution was obtained. Discrete data similarity measure was completed with combination of mentioned relative degrees. Power interconnected system with multi characteristics was considered to apply discrete similarity measure. Naturally, similarity measure was extended to multi-dimensional similarity measure case, and applied to bus clustering problem. 展开更多
关键词 similarity measure MULTI-DIMENSION discrete data relative degree power interconnected system
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Similarity measure design for high dimensional data 被引量:3
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作者 LEE Sang-hyuk YAN Sun +1 位作者 JEONG Yoon-su SHIN Seung-soo 《Journal of Central South University》 SCIE EI CAS 2014年第9期3534-3540,共7页
Information analysis of high dimensional data was carried out through similarity measure application. High dimensional data were considered as the a typical structure. Additionally, overlapped and non-overlapped data ... Information analysis of high dimensional data was carried out through similarity measure application. High dimensional data were considered as the a typical structure. Additionally, overlapped and non-overlapped data were introduced, and similarity measure analysis was also illustrated and compared with conventional similarity measure. As a result, overlapped data comparison was possible to present similarity with conventional similarity measure. Non-overlapped data similarity analysis provided the clue to solve the similarity of high dimensional data. Considering high dimensional data analysis was designed with consideration of neighborhoods information. Conservative and strict solutions were proposed. Proposed similarity measure was applied to express financial fraud among multi dimensional datasets. In illustrative example, financial fraud similarity with respect to age, gender, qualification and job was presented. And with the proposed similarity measure, high dimensional personal data were calculated to evaluate how similar to the financial fraud. Calculation results show that the actual fraud has rather high similarity measure compared to the average, from minimal 0.0609 to maximal 0.1667. 展开更多
关键词 high dimensional data similarity measure DIFFERENCE neighborhood information financial fraud
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