The mathematical relation was studied between micro amount of fragrant components and quality of Zhenmei tea by using R-type cluster and multiple regression.
用R型聚类分析、多元线性回归分析,研究了茶叶中微量香气成分与质量等级间的数理关系。
Based on an experimental study of multiple repairing welded joints on high strength offshore structure steel, the R-S-N curves and life estimation equations under Weibull distribution are presented.
对海洋平台用高强度钢焊接接头多次补焊的疲劳性能进行试验研究,给出采用威布尔分布下的寿命估算式及R—S—N曲线。
Originally developed by S. R. Ranganathan, a faceted description of an item uses multiple characteristics to provide a cross-indexing capability when information may belong to many categories.
面向方面的项目描述最初由 S. R. Ranganathan 开发,这种方法在信息可能属于多个分类时使用多个特征来提供交叉索引功能。
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