The nitride layer was formed on the surface of ductile cast iron by gas multi-element penetration, and the phase structure and section appearance of nitride layer were analyzed by the XRD and SEM.
球墨铸铁经过气体多元共渗后可在其表面形成氮化层，通过X射线衍射和扫描电镜对渗层的相结构与形貌进行分析。
A computer program to calculate atomic concentrations in the surface layer of multi-element solids from experimental RBS spectra is presented.
本文介绍了一个根据RBS实验谱计算多元素样品表面层原子浓度的程序。
Calibration standards can be bulk or multi layer of pure element or multi element standards.
所需的校正标样可以是纯元素或多元素的薄膜标样，亦可以是纯元素或多元素的块样。
Based on the method of moment and the boundary element method, an improved method to analyze the grounding system buried in multi-layer soil with finite volumes is presented.
提出了分析含有有限体积的参数不同的材料的水平分层土壤中的接地网接地性能的方法。
Based on the method of moment and the boundary element method, an improved method to analyze the grounding system buried in multi-layer soil with finite volumes is presented.
提出了分析含有有限体积的参数不同的材料的水平分层土壤中的接地网接地性能的方法。
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