It is shown that the radial diffusion of fast electrons leads both to a broadening of the driven current profile and to a reduction of the total driven current.
结果表明，高能电子径向扩散将使驱动电流分布变平和展宽，同时驱动电流减小。
The reduction activity of nitrate and the formation of ammonium are mainly controlled by the diffusion limitation and the mass transfer of the reactants.
同时，催化剂的活性和选择性受到扩散限制和质量传输的影响。
The diffusion of WO3 is the restrictive step of reduction process of WO3. Improving fluidity of slag and enlarging areas of reaction interface can accelerate reduction process of WO3.
还原WO3的限制性环节是WO3在熔渣中的扩散，改善渣的流动性，扩大反应界面能加快WO3的还原；
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