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APPROACH TO THE FEATURE DISTANCE xc = D1/R OF CRYSTALLIZATION DIFFUSION LAYER THICKNESS IN WELD METAL 对焊缝金属凝固结晶扩散层厚度特征距离X_c=D_l/R理论意义的探讨
diffusion layer thickness 扩散层厚度
The boundary layer thickness is a function of the convection condition, in the melt. 边界层厚度是溶体中对流条件的函数。
The microstructure and the properties of nickel diffusion layer were also investigated. 同时，对扩散层的组织和性能进行了研究。
By the integral to boundary layer thickness and relative conditions, the momentum integral equation of boundary layer is obtained. 通过对边界层厚度的积分并利用相关条件，得到了边界层动量积分方程。
The characteristics of so-called silicon diffusion layer were analyzed through EPMA and hardness test. 通过成分分析（EPMA）和硬度测试，分析了硅扩散层的特征。
These devices have optical waveguide structure, moderate doping level and active layer thickness. 该器件带有光波导结构并具有适当掺杂和有源层厚度。
It was found that the current and EL intensity synchronously swing with increasing Si layer thickness. 在一定的反向偏置下 ;电流和电致发光强度都随Si层厚度的增加而同步振荡 ;位相相同 .
SO_4~(2-) ions can hardly enter into Stern layer and SO_4~(2-) ions adsorbed byC-S-H surface distribute in the diffusion layer for the main. SO_4~(2-) 离子很难进入吸附层,被吸附的SO_4~(2-)离子主要分布在扩散层中。
The result gave the optimal filter particle diameter, layer thickness and filtration velocity. 根据实验结果，确定了最佳的过滤介质粒径、过滤层厚度和过滤速度。
The gas diffusion layer of air electrode was prepared by the rolling method with acetylene black and 60% PTFE emulsion as raw materials. 以乙炔黑、60%25PTFE乳液为原料,用辊压法制备空气电极的气体扩散层。
Ground effect has the very tremendous influence on boundary layer thickness, and air drag with underhood enhances 12%. 摘要地面效应对地面的气流边界层厚度有较大影响，而发动机舱内流会使整个轿车空气阻力增加12%25左右。
Until now, there have been many attempts to increase fuel cell performance by developing or modifying the gas diffusion layer (GDL). 直到现在，已有许多研究证实，改良气体扩散层的碳微孔层性质可以促进燃料电池的性能提升。
Develops the mathematic model and program for the optimization design of insulation layer thickness. 建立了保温层厚度优化设计数学模型,并编制了优化程序。
Moreover,metallograph examination and hardness measuring are made for the specimens and electronic probing imposition for the diffusion layer. 结果表明,在共析温度以下进行催渗氮碳共渗,具有渗速快、渗层硬度高的特点;
The five-layered high-strength, steel-base modified polyformaldehyde composite material has a proper layer thickness. 五层结构的高强度钢基改性聚甲醛复合材料的聚甲醛层厚度适宜时，由于聚甲醛弹性模量相对钢基较小，对于制造、安装及变形等因素引起的不理想接触等情况，有一定的自调整适应性。
Gas diffusion layer (GDL) is one of the most important electrode components in proton exchange membrane fuel cell (PEMFC). 在质子交换膜（PEM：Proton Exchange Membrane）燃料电池中，气体扩散层（GDL：Gas Diffusion Layer）是电极的重要组成部分，其结构和性能参数对电池的综合性能有重要的影响。
vocal cord infection 声带感染
To a good approximation, the induction response depends on the product of conducting layer thickness and conductivity. 为了更好地近似，感应现象取决于导电层的厚度和导电性。
By using the larger porosity of the gas diffusion layer, it can effectively prevent the anode side of the membrane from being dry, the cathode side of the membrane from flooding. 当使用孔隙度较大的气体扩散层，可以防止薄膜靠阳极侧乾化，薄膜靠阴极侧淹水，并可把各层达稳态的时间缩短。