Objective It is the first time that the near-infrared spectroscopy(NIRS)and chemometrics methods were used to establish ......

How to understand and use the new textbooks better, its a problem which makes educators and teachers always think.This a......

How to understand and use the new textbooks better, its a problem which makes educators and teachers always think.This a......

摘 要：该研究以XRF便携式X射线土壤重金属测定仪Ⅱ代机的性能提高为目标，在不大幅增加仪器成本的前提下，开展基于信息化技术的硬件集......