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基于模糊相似测量和模糊映射改进的模糊支持向量机对不确定性信息处理 被引量:2
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作者 王宇凡 梁工谦 杨静 《计算机应用》 CSCD 北大核心 2014年第7期2066-2070,共5页
针对传统模糊支持向量机(FSVM)对于不确定性信息处理的局限性,提出一种基于模糊相似测量和高维空间模糊映射的改进模糊支持向量机方法。首先,构建不确定信息集的模糊相似测量函数,从不确定性信息本质出发,利用Gregson相似度,构建具有模... 针对传统模糊支持向量机(FSVM)对于不确定性信息处理的局限性,提出一种基于模糊相似测量和高维空间模糊映射的改进模糊支持向量机方法。首先,构建不确定信息集的模糊相似测量函数,从不确定性信息本质出发,利用Gregson相似度,构建具有模糊特征的相似测量函数;然后,根据空间映射理论,将模糊相似测量函数应用于FSVM,构建满足Mercer理论的FSVM相似内核;最后,利用该方法对旋转超声加工中材料切屑率(MRR)中的不确信性信息进行建模。对比具有传统内核的FSVM,所提方法能够利用较少的运算步骤完成较好的不确定性信息处理,有效提高不确定信息处理的准确性,且计算复杂度低。 展开更多
关键词 相似测量 映射 核函数 模糊支持向量机 不确信性数据
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Quantitative comparison of similarity measure and entropy for fuzzy sets
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作者 JUNG Dong-yean CHOI Jung-Wook +1 位作者 PARK Wook-Je LEE Sang-Hyuk 《Journal of Central South University》 SCIE EI CAS 2011年第6期2045-2049,共5页
Comparison and data analysis with the similarity measures and entropy for fuzzy sets were carried out. The distance proportional value between the fuzzy set and the corresponding crisp set was considered by the fuzzy ... Comparison and data analysis with the similarity measures and entropy for fuzzy sets were carried out. The distance proportional value between the fuzzy set and the corresponding crisp set was considered by the fuzzy entropy. The relation between the similarity measure and the entropy for fuzzy set was also analyzed. The fuzzy entropy was reformulated as the dissimilarity measure. Furthermore, crisp set having the minimum uncertainty with respect to the corresponding fuzzy set was also proposed. Finally, derivation of a similarity measure from entropy with the help of total information property was derived. A simple example shows the relation between similarity measure and fuzzy entropy, in which the summation of similarity measure and fuzzy entropy represents a constant value. 展开更多
关键词 similarity measure fuzzy entropy minimum uncertainty quantitative comparison
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