英语释义

1. the quantity of a substance that in diffusing from one region to another passes through each unit of cross section per unit of time when the volume-concentration gradient is unity — called also diffusivity

片语

diffusion film coefficient扩散膜系数

diffusion n coefficient扩散系数

self-diffusion coefficient自扩散系数

Intrinsic diffusion coefficient本征扩散系数

diffusion rate扩散率；扩散速度

diffusion cooling coefficient扩散冷却系数

diffusion asymmetry coefficient扩散非对称性系数

diffusivity扩散率；[物] 扩散性

diffusion absorption coefficient扩散吸声系数

thermal diffusion coefficient热扩散系数

英汉例句

• increased partition coefficient and diffusion coefficient values were obtained with these enhancers.

  这些促进剂能增加药物的分配系数的扩散系数值。

• the mass transfer equation was introduced into heat transfer model of falling film evaporation. the radial velocity, mass diffusion coefficient and variation of film thickness were taken into account.

  将传质方程引入到垂直管降膜蒸发传热模型中，求解时考虑了径向速度、质量扩散系数和膜厚变化对传热的影响。

• the calculation of chloride diffusion coefficient in prestressed concrete structures eroded by chloride ion is discussed.

  针对氯盐侵蚀的预应力混凝土结构，讨论了氯离子扩散系数的计算。

• the estimated diffusion coefficient agrees with experiment within an order of magnitude.

  估计的反常扩散系数在量级上与实验一致。

• the extent of water mobility within biological tissues can be quantified by a parameter called the apparent diffusion coefficient (adc).

  水在生物组织内的流动程度，可以由一个被称为表观扩散复合系数（adc）的参数去量化之。

• the model of liquid diffusion in a solid fractal medium is developed by adopting random theory, and thus the relationship of diffusion coefficient between fractal medium and free space is obtained.

  采用随机过程理论导出了液相在固体颗粒分形介质中的扩散方程，得到了分形扩散系数与自由空间扩散系数的关系式。

• to calculate distribution of sediment concentration in vertical under wave and current, a model of silt diffusion coefficient distribution in vertical is set up.

  为了计算波流共同作用下含沙量沿垂线的分布，建立了沿垂线分布的泥沙扩散系数模型。

• a new mutual diffusion coefficient model was proposed based on the relation between self-diffusion coefficient and friction coefficient.

  根据分子间摩擦系数与组分自扩散系数关系，提出一个新的互扩散系数模型。

• the average value of hydrogen diffusion coefficient in metal hydride(mh) electrode was measured by constant current discharge method.

  利用恒流放电法测定了金属氢化物（mh）电极中氢原子扩散系数的平均值。

• the relation of diffusion coefficient with temperature has also been simulated.

  同时还模拟了流体自扩散系数随温度的变化关系。

• the diffusion coefficient of hydrogen in an iron membrane was measured using slightly improved electrochemical hydrogen permeation technique.

  一个略加改进的电化学氢渗透技术被用于测定氢在铁膜中的扩散系数。

• when the temperature and gel don't change, the increasing speed of precipitation is related to electrolyte density, diffusion coefficient and so on.

  在温度和凝胶介质一定时，沉淀的增长速率与电解质浓度、扩散系数及沉淀物质的溶度积常数有关。

• the steady-state diffusion coefficient is an important coefficient to describe the moisture transfer processes in particleboard.

  刨花板中水分的稳态扩散系数是描述刨花板导水性能的重要参数。

• according to the theory of flow diffusion and convection, three dimensional state equation of radon field is established for constant and variable diffusion coefficient and convection rate.

  根据流体场的扩散理论和对流理论，建立了扩散系数与对流速度为常量或变量情况下的氡气场三维状态方程；

• results showed that hydrogen diffusion coefficient exponential decreased with the increase of soc at the same temperature.

  结果表明：在同一温度下，氢扩散系数随着soc的增大，呈指数关系衰减。

• diffusion coefficient is one of the important parameters deciding migration prediction in migration model of compounds from food packaging material.

  在食品包装材料化合物的迁移模型中，扩散系数是决定模型预测性的重要参数之一。

• in salt water the composites had less water absorption, absorption rate and diffusion coefficient than that in di water.

  与在去离子水中相比，材料在盐水中饱和吸水率、初始时吸水速率和水扩散系数较小。

• for the study, measurements were translated into scores called apparent diffusion coefficient (adc) values for each of the participants.

  每个参与者研究的测量结果被转化成一种叫做表现弥散系数（adc）的数值。

• the determination of material structure, performance parameters and membrane resistance, membrane diffusion coefficient of the f4112 ion exchange membrane were introduced.

  介绍了f4112离子交换膜的材料结构、性能参数及膜电阻、膜中扩散系数的测定方法。

• combined with the theory of viscosity, the relationship between diffusion coefficient and activation energy is expressed.

  结合粘度理论建立了分子扩散系数与活化能之间的关系；

• the equilibrium absorption studies indicate that the permselectivity of the anion exchange membrane is related not only to the component solubility, but mean diffusion coefficient as well.

  三种抗衡离子膜的平衡吸收实验表明，该阴离子膜的选择渗透性不仅与醇水在膜中的溶解度有关，而且取决于平均扩散系数。