运用离子选择性电极（ISE）和X射线衍射分析（XRD）方法，对云南昭通威信地方病氟中毒区的氟源进行了研究。
The sources of the endemic fluorosis in Weixin, Zhaotong of Yunnan Province has been studied using an ion selective electrode(ISE) and X-ray diffraction analysis(XRD).
通过DTA和TG结合X 射线衍射分析的方法，将硫化铜精矿加碳酸钙焙烧与硫化铜精矿焙烧的反应机理进行了对比研究。
The roasting process of copper sulfide concentrate in the presence of calcium carbonate is studied by using the differential thermal analysis (DTA), thermogravimetric (TG) and X-ray diffraction.
理论上采用射线近似方法分析了时间反转声场特性，实验上在实验室内开展了水下波导的超声模拟实验。
The ray approach is adopted to study the acoustic field in theory, and the ultrasonic experiment has been carried out in laboratory to model the underwater waveguide.
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