The binary monomer system, Benzel methacrylate(BzMA) Methyl methacrylate(MMA) layer gradient refractive index(GRIN) plates can be successfully fabricated by liquid gel diffusion copolymerization.

采用溶液凝胶扩散共聚法可以成功地合成二元体系的甲基丙烯酸苄酯甲基丙烯酸甲酯层状梯度折射率板。

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Research mechanism of diffusion and infiltration of concrete, analyze the main influence factor of the concrete permeability and summarized the method of testing of the penetrating index of concrete.

研究了水、氯离子及气体在混凝土中的渗透与扩散的机理，分析了影响混凝土渗透性的主要因素及有待进一步研究的方向，并总结了混凝土渗透性指标的测试方法。

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Based on an analysis of rheology and mass transport principle, a mathematical model was formulated for describing the co-extrusion and diffusion process of graded index polymer optical fiber (GI POF).

基于流变学原理和质量传递原理的分析，建立了一个能够描述渐变型聚合物光纤(GI POF)共挤扩散制备过程的数学模型。

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Sentiment was better among large non-manufacturers too, with the headline "diffusion index" (DI) rising to 6, from 4 in December.

CNN: Japanese business sentiment ticks up