利用多元分析法对49个二棱型啤酒大麦育种材料的7个主要性状指标进行了主成份分析与聚类分析。
By means of multielement analysis, 7 character indexes of 49 breeding material had been made by a main composition and cluster analysis in malting barley.
用主成份分析研究了影响北京地区土壤元素背景值的主要因素。
The main component analysis has been used to study the principal factors which affect soil background contents of a number of metals in Beijing area.
研究蓝钨氢还原工艺并分析了蓝钨在氢气还原过程中主要相成份的变化。
In this article, the process and main phase composition are studied during the deoxidization of blue tungsten oxide in hydrogen.
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