扩散

Result and conclusion: The electrochemical experimental results show that the two totally irreversible oxidation peaks in the region of 0.3-1.2 V vs SCE for both MT and SR were observed,and the electrode reactions processes were diffusion-controlled.Their electron transfer number n and electron transfer coefficient α were obtained by CV and electrolysis with coulometry.The diffusion coefficient D and rate constant k f were also calculated by CC and CA.

结果与结论：在0.30~1.2 V电位窗口内，MT和SR均产生1个不可逆氧化峰，并且它们的电极反应均受扩散步骤控制；用控制电位电解库仑法和循环伏安法得到MT和SR的电极反应电子转移数n和电荷转移系数α，运用计时库仑法和计时电流法测定了它们的扩散系数 D 及电极反应速率常数kf。

ABSTRACT Appling the numerical model and control theory to the state identification of carbon migration in dissimilar metal weldments , its law and quantitative calculation were researched. Based on analysising of metallurgical and dynamics properties of DMWs, the influences of welding procedure's factors on their high-temperature properties were studied in this dissertation. The following are the main contents.

本文将数值化建模和控制理论引入到异种钢焊接接头碳扩散迁移状态辨识，对碳的扩散迁移的规律及定量计算进行了研究，在对异种接头冶金性能和力学性能进行分析的基础上，对焊接工艺因素对接头性能的影响进行了研究，主要内容如下： 1。

In the study of Y-shaped micromixer of straight channel, the inlet velocity and diffusion coefficient have tremendous influence on mixing of fluid. With the increase of inlet velocity and diffusion coefficient, the mixing effects of two kind of liquid gradually worsen.

在对Y型直通道微混合器的研究中发现，液体的入口速度和扩散系数对混合有较大的影响，随着入口速度和扩散系数的增大，其混合效果逐渐的变差。

Biodegradation is a dynamic process, where the diffusion of hydrocarbon to oil water contact, the diffusion of metabolites away from the reaction site to the oil column. Late charging and mixing occurred in the reservoir also control on the degree of biodegradation.

生物降解是一个动态过程，烃类不断向油水界面扩散，降解过程中新形成的代谢物从油水界面向油柱扩散，后期充注及油藏内的混合作用也是控制生物降解作用程度的重要因素。

However, the dispersal locality and distance of different marine species is not clear, we are targeting on the genetic connectivity of several taxa of marine organisms around Taiwan, South China Sea, and East China Seaboards.

但是由於目前尚未清楚得知不同物种扩散位置与距离为何，因此目前进行之研究以不同扩散能力之物种在台湾，南海，东海和西太平洋诸岛海域之遗传连通性。

According to the experimental results, both the conducting area and material of current collector slices have great influence on the performance of micro PEMFC, especially the former one. The increment of cell's performance is finite by increasing the gas reheats temperature. The performance is better for open ratio 75% compared with 50% and 67%. The concentration polarization is improved by increasing the air flow rate at high current density and if the GDL diffusive capability in the latter cell could be promoted, the differences between these two cells' performances would be reduced.

由实验结果可知，集电片的导电面积与材料对於电池性能有显著的影响，尤其是前者；对於增加反应气体的再热温度，微型燃料电池增加的性能有限；双极板开孔率75%相较於开孔率为50%与67%有最佳的性能曲线；增加阴极气体空气的流量，可以改善高电流情况下的浓度极化现象，所以若我们能增加气体扩散层的扩散能力，则可以减少两者的性能差距。

Potato flour, soybean powder, FeSO_4 were screened out as the most suitable carbon source, nitrogen source and inorganic salt source, respectively. Based on these, screening methodology Plackett-Burman design was used to evaluate the effects of twelve factors related to amylase production and three statistically significant factors soybean powder, temperature, bran were selected.

酶对底物的作用方式表现出多样性，以表面扩散侵蚀的方式作用于马铃薯和木薯生淀粉，以表面扩散侵蚀和形成大侵蚀孔洞的方式同时作用于红薯淀粉。4、利用响应面法对菌株AF-1固态发酵产生淀粉酶的条件进行了优化。

One gauge (3000 PSI max) displays the pressure inside the bottle and the other gauge (60 PSI max) displays the pressure leaving the adjustable regulator.

一计（ 3000防扩散安全倡议最大值）显示的压力，内瓶和其他衡量（ 60防扩散安全倡议最大值）显示的压力，离开可调的调节器。

Disposed sediment is deposited dominantly near the disposal site on neaps, and it disperses far away in moderate and spring tides.

小潮型抛泥泥沙主要就近扩散和沉降，中潮和大潮型抛泥泥沙输移扩散范围较远。

The expression for the relation between the pseudo pressure and the pressure of real gas is obtained and then applied to analyze the inflow performance relationship of gas wells.

为了更准确地描述压敏油藏真实气体渗流特性，通过引入广义拟压力函数来表征压敏油藏气体的渗流过程，使气体渗流扩散方程与单相微可压缩液体渗流扩散方程有相同的形式。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。