扩散

The invention relates to a gaseous diffusion layer for a polymer electrolyte membrane fuel battery and a preparation method thereof, relating to a gaseous diffusion layer for a fuel battery and a preparation method thereof.

用于聚合物电解质膜燃料电池的气体扩散层及其制备方法，它涉及一种用于燃料电池的气体扩散层及其制备方法。

In order to investigate the influence of membrane diffusivity on the charge-discharge performance of a single all vana- redox flow battery,the diffusion coefficients of VO~(2+) and VO_2~+ in two types of given ion exchange membrane s were measured with a specific designed permeation cell,the diffusion coefficients were about 10~(-9)～10~(-7) cm~2/s.

为了研究隔膜扩散特性对全钒氧化还原液流单电池充放电性能的影响，利用设计的渗透池实验测定了VO2+和VO2+在两种离子交换膜中的扩散系数，约为10-9~10-7cm2/s。

The source diffusion layer and the drain diffusion layer are formed integral with each other, so that the protection circuit on the input end is substantially constituted of one buffer transistor.

源扩散层和漏扩散层相互形成整体，使输入端的保护电路基本上构成一个缓冲晶体管。

Finally, taking into account the characteristics of adsorption, diffusion and desorption in zeolite channels, a Monte Carlo model for the simulation of TPD spectra of adsorbates from zeolites was presented.

根据沸石分子筛中的吸附、扩散和脱附的特点，考虑扩散效应后，建立了一种模拟沸石分子筛上TPD谱的Monte Carlo方法及相应的计算机软件。

After rapid thermal processing at 1050 ℃ and 900 ℃ with oxygen and argon ambients for different dwell time, the phosphorous diffusion was characterized by SRP and FPP.

利用SRP和FPP研究了不同气氛、时间和温度的RTP处理后样品中磷的扩散情况及扩散深度随时间变化的规律。

This paper has studied the interface reomhbination characteristics of HIPdiffusion bonking of cemented carbide to metals including commercial pure iron,A3 car-bon steel,No .45 carbon steel and T10 carbon tool steel.

研究了硬质合金与工业纯铁、A3钢、45钢和T10碳素工具钢等金属热等静压扩散的界面复合特征，阐述了有害界面脆性相η－Fe＿3W＿3C的成因和控制方法，考察了各扩散连接接头的接合强度。

The author calculated and simulated three kinds of diffuser augmented wind turbines of eleven models under different velocities,and obtained curve pictures of enhanced ratio of flow rates and ratio of flux rate at the minimal section of DAWT.

计算不同风速时的渐扩直壁型、渐缩渐扩直壁型、渐缩渐扩前后流线型共3个类型11种不同形式的扩散器动力放大的流量比增益特性，最小截面处流量增加比率；比较不同形状、不同参数扩散器动力放大特性。

The surface molecular oxygen desorbs at 340K and does not react with CO.

体相氧和次表层氧向表面的扩散遵循不同的扩散机理。

The experimental determination of effective inter—diffusion coefficient of non—reactive condition of immobilized enzymes: The immobilized enzyme was immersed into the substrate of dextrine solution. The De value was measured as well as fitted theoretically.

无酶解反应发生条件下，对消除活性后的固定化酶有效内扩散系数的测定：在本实验系统下，建立相应实验设备，采用浸入法测定了基质糊精在固定化酶中的有效内扩散系数，并进行了De值的拟合计算。

This report will have the special topic 'Technology Diffusion in Developing Countries,' and will present solid evidence on the importance of trade, FDI and diasporas in the dissemination of technology.

这份报告有一专题：&发展中国家技术扩散&，它将提供可靠的证据，贸易，外国直接投资，以及海外移民社区在技术扩散方面所起的重要性。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。