扩散

In Chapter 3,we discuss the Cauchy problem for reaction-diffusion system of Fujita'stype with singular coefficients.

第三章讨论具有奇异系数的Fujita型反应扩散方程组的Cauchy问题。

Proliferation of fibroblastic cells in bone marrow,caus in g anemia and sometimes enlargement of the spleen and liver.

骨髓纤维化，骨髓纤维变性在骨髓中成纤维细胞的扩散，常引起贫血症，而且有时也会导致脾和肝的增大

Cell growth and division are controlled by genes .

细胞生长和扩散是由基因控制的。

The activation energy of cellular decomposition calculated by DSC date was 88.24kJ/mol, which showed that the decomposition was controlled by Zn atom diffusion.

DSC数据计算得出，胞状分解的相变激活能为88.24kJ/mol，表明其分解主要受锌原子扩散控制。

Numerical simulations of the three dimension viscous flow over the SUBOFF-1 model provided by DARPA and other two models are processed by solving RANS equations withκ-εtwo-equation turbulence model and finite volume method, and with SIMPLEC method for pressure-linked terms, central difference shemes for temporal derivative terms, and second-order upwind schemes for convective and diffusive terms.

本文基于RANS方程，采用κ-ε两方程湍流模型来封闭控制方程，采用有限体积法离散控制方程，对于速度压力关联方程，应用协调一致的SIMPLEC算法求解，变化率项用中心差分，对流扩散项采用二阶迎风格式，分别对DARPA提出的裸艇体SUBOFF-1模型以及另外两种回转体模型进行了数值模拟计算。

A one-sided difference approximation is used for convection terms and a second-order central difference approximation for diffusion term.

二阶一边差分逼近用于对流项的离散，二阶中心差分逼近用于扩散项的离散。

This kind of microstructure is ascribed to increasing ceria interfacial diffusion by alumina doping.

这种微结构的形成是Al〓O〓掺杂对CeO〓界面扩散产生影响的直接结果。

CFC substitutes and technology has been the proliferation of technological superiority in this respect in the cut.

氯氟烃替代品和技术已在这方面继续削减方面的技术优势扩散。

At 87 psi they achieve a flow rate of 2 5 and 9 CFM.

他们在87防扩散实现2，5流量和9立方英尺。

At 70 psi, and 2000 rpm, this motor consumes less than 40 cfm (70 cfm for the 4.0HP motor) of compressed air.

在70防扩散安全倡议，并于2000年的rpm ，这个电动机消耗少于40运行（ 70运行为4.0hp电机）压缩的空气。

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。