摘要
2007年,申效诚提出了多元相似性系数的计算公式SIab…n=[(∑Hij)2/n+(∑Hijk)3/n+…+Hab…n]/[∑Si-∑Hij-2∑Hijk-…-(n-1)Hab…n],由于项次较多不便记忆和运用,又推导出多元相似性的简便计算公式SIab…n=∑Hi/nS,并提出相似性和相异性贡献率的概念及其计算方法。
The formula of multivariate similarity coefficient for analysis of insect fauna,SIab…n=[（∑Hij）2/n＋（∑Hijk）3/n＋…＋Hab…n]/[∑Si-∑Hij-2∑Hijk-…-（n-1）Hab…n],was reported in 2007. However, the formula is too long to be memorized and difficult for use. Here, a simpler formula,SIab…n=∑Hi/nS, is suggested. A new concept of contribution rate of similarity and difference is also proposed in this paper.
出处
《河南农业科学》
CSCD
北大核心
2008年第7期67-69,共3页
Journal of Henan Agricultural Sciences
关键词
多元相似性
公式
相异性
贡献率
Multivariate similarity
Formula
Difference
Contribution rate
