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diffusion of water
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  “diffusion of water”译为未确定词的双语例句
     Activation energies E of diffusion of water vapor in these zeolites decrease from ≥10 kcal/M to 4~5 kcal/M as a increases from 1.5 mM/g to≥6mM/g.
     α从1.5毫克分子/克增加到≥6毫克分子/克,扩散潘化能从≥10千卡/克分子下降至4~5千卡/克分子。
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     The diffusion mechanismof water through PEI-Co complex membranes was also discussed, and it is found that the diffusion of water primarily obeys Fickian's law, and the activation energy of diffusion is calculated to be 40.4 kJ/mol.
     讨论了水在PEI-Co络合物膜中的扩散机理,发现基本符合Fickian定律,计算得到水在PEI中的扩散活化能为40.4kJ/mol。
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     The variation of swell stress shows that with the increase of swell stress, the diffusion of water in GCL will be restrained, and water penetration stopped, so GCL has a water-proofing effect.
     膨胀应力的分阶段变化表明:膨胀应力的增加会阻止水在GCL中扩散,进而抑制水渗透,达到防水效果。
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     Diffusion of water in gels was a non-Fickian mechanism, i.e. both diffusion and relaxation of the macromolecular chain.
     凝胶内部水的扩散均为non-Fickian机制,即扩散和链松弛协同作用的机制。
     Distribution and diffusion of water body with high suspended sediment concentration in Jiulongjiang Estuary
     九龙江河口湾高浓度悬沙水体的分布与扩散特征
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  相似匹配句对
     in water.
     对于水,它约为4 ×10~3大气压.
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     in water of P.R.
     R.
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     and water;
     水分:31。
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     WATER VAPOUR DIFFUSION IN THE SUBSTOMATAL CAVITY
     气孔下腔间的水汽扩散
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     Diffusion Experiment of Water in Andesitic Glasses
     安山质玻璃中水的扩散实验
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  diffusion of water
The method of NMR spin echo with the magnetic field pulse gradient was used for studying self-diffusion of water molecules in the radial root direction.
      
Electron microscopy shows a formation of nanodispersion droplets during the diffusion of water through the organic phase of water-in-oil emulsions.
      
A Study of Magma Flows in the Case of Non-Equilibrium Diffusion of Water in the Melt
      
The effects of the treatment of thin polyimide films of different thickness (2-7.5 μm), which were prepared from poly(amic acid) solutions, in a radiofrequency-discharge plasma on the diffusion of water and the permittivity were studied.
      
The diffusion of water through the layer of a hydrated product was found to be a rate-limiting step.
      
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The kinetics of adsorption of water vapor has been studied at 100℃ and 130℃ for Linde 4A, 5A and 13X zeolite pellets. Rates of adsorption were followed gravimetrically in a conventional high vacuum gas adsorption apparatus. The effective diffusion coefficients De of water vapor were found to vary with the amount adsorbed, a. Values of De showed a maximum at a≈2 mM/g for 4A and a≈4 mM/g for 5A. In the range a≥7 mM/g D. increases sharply as a increases for all these three types of zeolites. Activation energies...

The kinetics of adsorption of water vapor has been studied at 100℃ and 130℃ for Linde 4A, 5A and 13X zeolite pellets. Rates of adsorption were followed gravimetrically in a conventional high vacuum gas adsorption apparatus. The effective diffusion coefficients De of water vapor were found to vary with the amount adsorbed, a. Values of De showed a maximum at a≈2 mM/g for 4A and a≈4 mM/g for 5A. In the range a≥7 mM/g D. increases sharply as a increases for all these three types of zeolites. Activation energies E of diffusion of water vapor in these zeolites decrease from ≥10 kcal/M to 4~5 kcal/M as a increases from 1.5 mM/g to≥6mM/g. From the experimental results, it appeared that: (1) rate of adsorption of water vapor by pellets of zeolites is controlled mainly by the diffusion of water vapor in the crystals of the zeolites; (2) the metallic cations and pore structure of the crystals show greater effect on such diffusion process at low adsorption; and (3) on approaching saturation adsorption the diffusion of water molecules in the zeolite crystals is similar to that in liquid water.

本工作用高真空重量法研究了100℃和130℃下Linde 4A、5A和13X沸石分子筛颗粒上的水蒸气吸附动力学,得到了在三种沸石颗粒中水的有效扩散系数D_e随吸附量α而变化的数据。对于4A,α≈2毫克分子/克处出现D_e极大值;对于5A,α≈4毫克分子/克处出现D_e极大值。当α≥7毫克分子/克时,在三种沸石上均观察到D_e值随α增大而剧烈上升。α从1.5毫克分子/克增加到≥6毫克分子/克,扩散潘化能从≥10千卡/克分子下降至4~5千卡/克分子。根据所得实验结果可以认为:(1)沸石颗粒吸附水蒸气的速率主要取决于水分子在沸石晶粒内的扩散;(2)在较低吸附量时,沸石晶体中的金属阳离子和孔隙结构对水分子的扩散行为起着较大影响;(3)在接近饱和吸附时水分子在沸石晶体中的扩散类似于在液体水中的扩散。

With the oven drying method, this paper studied unsteady-state diffusion of water in woods of Schima and Castanoipsis up. and effecting factors, and approached a basic law of unsteady-state diffusion of water. At the same time, the scientific basis was provided for laying down wood drying schedule.

采用烘干法,研究了木荷和栲木两种木材的水分非稳定扩散性及其影响因子,探讨了木材水分非稳定扩散性的基本规律,为木材干燥制定合理的工艺提供了科学依据。

Fibre hybrid composites are gaining more and more application. So the effects of moisture on hybrid composites are widely concerned. The moisture absorption characteristics is important because it is the basis of investigating the moisture effects. Hybrid composites have several structure parameters that the single composites haven't, such as hybrid ratio (HR). Hybrid interface number (HIN) and sequence of layup(SL). The diffusion of water in hybrid composites must be affected by these parameter. Single...

Fibre hybrid composites are gaining more and more application. So the effects of moisture on hybrid composites are widely concerned. The moisture absorption characteristics is important because it is the basis of investigating the moisture effects. Hybrid composites have several structure parameters that the single composites haven't, such as hybrid ratio (HR). Hybrid interface number (HIN) and sequence of layup(SL). The diffusion of water in hybrid composites must be affected by these parameter. Single (glass, carbon and kevlar) and hybrid (glass/carbon, carbon/fcevlar with different HR, HIN and SL) unidirectional composites with two types of matrixes (epoxy and BMI) are fabricated. The weight change of these materials with time are tested under 80°C water immersion condition. The diffusion coefficient (Dx) and equilibrium moisture con-tent(Mm) are obtained from the tests. It is found that the water diffusion in single and hybrid composites satisfies the Fickian process. The Dx and Mm values of hybrid composites are between two single composites' and increase with the increase of the content of the single composite which has a higher Dx and Mm values. The increasing of the HIN of hybrid composites decreases the Dx but doesn't affect the Mm obviously. The sequence of lay-up doesn't affect either Dx or Mm.in addition, the step-by-step model and thermal model are developed to estimate the Dx and Mm of hybrid composites. The estimsted values are in good agreement with the experimental ones.

本文采用80℃水浸的方法,研究了不同类型混杂复合材料层压板的吸湿行为,找到描述混杂复合材料吸湿规律方程。同时,从理论上对混杂复合材料的平衡吸湿量及湿扩散系数进行了分析,建立了数学表达式,理论与实验较好吻合。

 
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