First in 2010 in its annual chose five indicators using clustering analysis will be a company for classification.
首先在2010年年报中选择了五项指标利用聚类分析将个公司进行分类。
Classification standards of indicators for soil quality evaluation were put forward and the situations of soil property of Hebei Plain were discussed.
提出了河北平原土壤质量评价指标的分级标准，依据该标准对河北平原典型土壤样品进行了单因素评价。
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