表2 土壤及稻米中3种重金属浓度table 2 heavy metal content in soil and rice2.3 稻米食用安全风险判断根据85个样品监测结果,cd在第1组25个稻米样品中有...1 土壤重金属不同风险级别条件下精米超标率fig.1 excess ratio of milled rice content under different risk levels of heavy metals
of protection systems in intelligent substation based on the structure entropy weight method and fault...10.1109/tsg.2013.2293131(1)iwayemi a, yi p, dong x, et al. knowing when to act: an optimal stopping method