查询词典 diffusivity

Because trimethyl silyl-substitited PPO have similar gas solubility but various diffusivity, difference between gas permeability is mainly caused by gas diffusion coefficient.

故二者气体透过系数的不同主要是由于扩散系数的差异。

The higher the thermal diffusivity and bonding strength between lamellae, the more wear-resistant the coating.

涂层的导温系数和层状颗粒相互之间的结合强度越高，层状颗粒的厚度越厚，其抗粘着磨损性能越好。

Cm.℃.min-1,0.344 J.-1 and 0.311 J.-1.The average thermal diffusivity is 0.244～0.247cm2.min-1.By pressing soil and using lichen coat,the reforesting technique of catchment can lighten the bad effect of nudity soil,and can lower down average topsoil temperature by 0.2～1.5 ℃, maximum topsoil temperature by 2.7～4.0 ℃, topsoil temperature amplitude by 2.5～3.7 ℃, and depress 11%～25%soil thermal flux and 4%～15%soil evaporation.

拍光压实后喷涂引植地衣、苔藓，可有效缓解地表裸露后产生的负影响，在生长季可降低表层均温0.2～1.5 ℃，降低最高表层土温2.7～4.0℃，降低表层土温日较差2.5～3.7 ℃，降低土壤热通量11％～25％，有效降低土壤蒸发4％～15％。

It was also showed by the results of linear polarization and impedance spectroscopy that hydrogen storage alloys coated could increase the exchange current density I0 and reduce the electrochemical reaction resistance, illustrating that the surface coating could increase electrocatalytic activity and enhance the diffusivity of electric charge in alloy surface, so that the high-rate discharge performance of the coated electrode was improved.

线性极化扫描和电化学阻抗图谱分析结果表明，包覆Cu、Cu-Co及Cu-Ni处理改善合金电极的交换电流密度I0，降低电化学阻抗，说明包覆处理改善合金表面的电催化活性，加快合金表面电荷的迁移速率，从而提高高倍率放电能力。

The thermal diffusivity of diamond films and diamond-based masks were measured by means of the photothermal deflection method with an error of 5%.

我们采用光热偏转法实现了金刚石薄膜和金刚石基底掩模的热扩散率和热导率的测试，测量误差小于5%。

Then we studied the photothermal deflection on membrane with high transparence for the first time. When the product of the thermal conductivity and thickness of film is correspond to that of substrate, the thermal conductivity and diffusivity of film could be measured by photo-thermal deflection method.

然后，第一次探讨了透明性好的带衬底的薄膜材料的光热偏转理论，讨论了只有在薄膜热导率与厚度的乘积与衬底的热导率与厚度的积相比拟时，可以使用光热偏转方法测量薄膜的热导率和热扩散率。

Based on mathematical analysis of unsteady-state diffusion process in diaphragm diffusion cell, a steady-state flow technique for measuring effective diffusivity in gels has been developed.

一、借鉴测定液相扩散系数的膜池法，并基于对非稳态过程的数学分析，本文建立了测定凝胶中有效扩散系数的稳态流动法；设计了一种适用于支载高含水量强度较低的凝胶及固定化细胞类软性物质的成膜框架，改进了膜状软性物质厚度的测量方法，使实验易于进行，提高了重复性。

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。

A new solution has been obtained for Larson′s model of finite pulse time effects in the flash method for measuring thermal diffusivity by means of Green′s functions.

用格林函数法推导了闪光法测定热扩散率的有限脉冲效应的Larson方程得到了一个与Larson不同的解，对这2个解进行了对比和讨论，指出了Larson的解所存在的问题。

Gas diffusivity in concrete is an important factor for researching concrete carbonation and reinforcement corrosion.

一般大气环境下，影响混凝土结构耐久性的主要因素是混凝土碳化引起的钢筋锈蚀。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失