Time-varying diffusivity is a major factor for the reaction-diffusion system dynamics. And also it is the hot and difficult research point of pattern dynamics.

Photothermal signals from anisotropic media, which is irradiated by a modulated laserbeam, are analyzed in the second part. The temperature field and thermal diffusivity tensor of anisotropic media is theoretically studied.

第二部分分析了各向异性介质受调制激光束辐照下产生的光热信号，理论上推导各向异性介质的温度场以及热导率张量；

The influence of carbon content. nickel content in binder and temperature on the thermal diffusivity of WC-Co-Ni hard metals were studied.

本文研究了配碳量、粘结相中镍含量和温度对WC－Co－Ni硬质合会热扩散事的影响。

The adsorption equilibrium constants decreased with the temperature, while the diffusivity increased with temperature.

烃分子的吸附平衡常数随温度的升高而降低，而扩散系数随温度的升高而增大。

Variation of Soil Temperature and Thermal Diffusivity in Vegetated and Bare Sand Dunes in Arid Desert Region

沙漠地区人工固沙植被对土壤温度与土壤导温率的影响

Simultaneous temperature and thermal diffusivity measurement of ultra-high temperature material based on multi-spectral technique

基于多光谱技术同时测量超高温材料的温度和热扩散率

The solution and aging behaviors of the composites are analyzed through effective diffusivity theoretical equation.

用有效扩散理论分析了颗粒增强复合材料的固溶时效特性。

Based on some reasonable simplifications on turbulent eddy diffusivity and mean velocity, an analytical solution to the charge transportation equation related to flow electrification is derived, by which an expression for the streaming current in a pipe is derived.

在合理简化紊流扩散系数和油流速度的基础上，推导出油内有关油流带电的电荷输运方程的解析解，并且根据该解析解导出了冲流电流计算公式。

The sensitivity analysis of the model parameters reveals that liquid flow pattern on a tray is the most important factor affecting the result, while liquid flow distribution between pools and eddy diffusivity are shown to be insensitive parameters.

计算结果表明，塔板上液体流型是影响模拟结果的最主要因素，而各混合池间的流速分布和涡流扩散系数不是敏感参数。

Based on the one-dimensional advection-diffusion model, we quantitatively estimate the eddy diffusivity and the associated nutrient fluxes. The findings provide the basis for the scientific management in the coastal area.

以一维平流-扩散模型为基础，定量认识海洋水体平流和扩散过程、评估其输送的营养盐通量，为海岸带及近海海域的科学管理提供依据。

A new model for the prediction of locally distributed Reynolds shear stress and eddy diffusivity in bubble columns is presented by taking account of the two phase turbulence flow properties of such reactors.

根据鼓泡塔内的两相湍流特性，提出估算塔内局部Reynolds剪切力的方法，由此导出新的局部涡扩散系数关系式，讨论其与既有关系式的异同并与湍流实测数据比较。

Thrid, layering horizontal eddy diffusivity patterns within TL are used, Fourth, new dry deposition velocity pattern including the effect of plant canopy layer vertical structure is adopted.

第三，使用TL内分层的水平涡旋扩散系数型；第四，采用包含有植物冠层垂直结构影响的新干沉积速度型；

EDDY DIFFUSIVITY AND TURBULENT STRUCTURES IN BUBBLE COLUMNS The Turbulent Mixing and Double Diffusion in Yellow Sea and East China Sea and Their Seasonal Variation

鼓泡塔中的有效涡扩散系数及湍流特性黄东海湍流混合与双扩散现象及其季节变化

In boundary layer dynamics, the eddy diffusivity is a important parameter for the wind structure in the planetary boundary layer.

在边界层动力学中，涡动粘性系数是影响边界层风场结构的一个重要参数。

We analyzed the thermal behavior of the gas content. Gas diffusion and nucleus stability has been discussed based on diffusive equilibrium of the interface.

分析了气核内气体的热力学行为，基于相平衡条件，还讨论了气体扩散与空化核稳定性的关系。

Design of Diffusion Pump System for Resistance Vacuum Furnace

高温电阻炉扩散泵真空系统的设计

Development of an automatic testing system for diffusion pump performance

扩散真空泵性能自动测试系统的研制

Relationship between pumping speed of oil diffusion pump and gases pumped

油扩散泵抽气速率与被抽气体的关系

There are some reference effect in design of other types of diffusion pump.

对设计其他类型的扩散泵具有一定的参考作用。

Analysis of the Influencing Factors of Liquid Fuel Mini-scale Diffusion Flame

液体燃料小尺度扩散火焰影响因素分析

Carbon nanotubes synthesis using diffusion flame is a kind of novel technique.

利用扩散火焰合成碳纳米管是一项新的技术和方法。