连续性方程

We can simplify it further, using the continuity equation, this becomes

我们可以进一步简化，利用连续性方程，这成为

This relationship will eventually be substituted into the equation of continuity for moisture, which is now derived.

这个关系式最终要代到下面要推导的水连续性方程中去。

We find that the naturally defined spin current obeys the covariant continuity equation.

我们发现，普遍定义的自旋流满足协变形式的连续性方程。

The fluid model includes the continuous equation of particles and Poisson equation, etc.

流体模型主要包括粒子连续性方程和泊松方程。

From acoustic wave equation, current continuity equation and boundary conditions, we have solved the interface potential produced by BAWs in interface between piezoelectric solid and semiconductor. The results of YZ LiNb03/n-Si structure with SV wave incidence have been calculated and experimental result has been given. Finally, we have presented some kinds of BAW acoustoelectric convolver structures and analyzed their features.

由声波动方程，边界条件和半导体的电流连续性方程出发，推导出了斜入射体波在压电体/半导体界面产生的界面电势以及通过半导体的作用产生的倍频电势的结果，并且对YZ-LiNb03/n-Si结构，SV波入射的情况进行了计算，给出了部分实验结果，提出了几种可能的体波声电卷积器的结构，并分析了它们各自的特点，理论和实验的结果将为今后这类器件的研制提供依据。

The transfer matrix method is used to carry out the vibration characteristic analysis of the fluid-filled piping system. The transfer matrix of the axial, transversal and torsion vibration of the fluid-filled straight pipe element is presented. And the transfer matrix of the elbow is derived according to the discrete model of the inextensible theory of the curve pipe. The effect of the flexural factor on the elbow's transfer matrix is studied.

基于充液直管的梁模型，考虑液体与管道之间的泊松耦合，详细推导了充液直管单元的轴向、横向及扭转振动传递矩阵；采用弯管不延伸理论的离散模型，将变管离散为一组首尾相连，并成一定角度的短直管单元，通过建立弯管处力平衡方程与连续性方程，建立了弯管平面内振动的传递矩阵，并研究了弯曲因子对传递矩阵的影响。

A two-dimensional, two-phase and multi-component transport model was developed for the cathode of PEM fuel cell using interdigitated gas distributor.

对叉指型质子交换膜燃料电池阴极提出一个二维两相的多组分流体输运模型，应用连续性方程和Darcy定律以及组分扩散方程描述了反应气体和生成水的流动和传质。

This paper described the principle of plane ultrasonic spreading abroad in the liquid coming into being ultrasonic grating,educed the density and refractive index changing rule basis continuity equation of not-ideal liquid and Lorentz-Lorenz law,expressing the transformation of the index and refractive index satisfaction similar equation of standing wave,and described the relation curve of the standing wave form at a few special times,liquid density and refractive index periodic variety according to the res...

描述了平面超声波在液体里传播形成超声光栅的原理；根据非理想流体对应的连续性方程和Lorentz-Lorenz定律，推导了液体光栅中液体密度与折射率的周期性变化规律，表明液体密度和折射率变化满足相似的驻波方程；根据推导的结果描绘了几个特殊时刻的驻波波形、液体密度、折射率周期性变化之间的关系曲线；进而由折射率周期性变化规律分析了超声驻波自身像的形成原理，并给出了CGS型超声光栅声速仪利用超声驻波自身像测量声速的方法与实验结果。

As a mesoscale simulation method Lattice Boltzmann Method based on mass and momentum conservations is used to simulate the complex fluid, in which Continuity and the Navier-Stokes equations can be conformed.

作为一种介观模拟方法，格子玻尔兹曼方法在保证质量守恒和动量守恒的前提下，模拟的复杂流体能够满足流体力学中的连续性方程和Navier-Stokes 方程。

As a mesoscale simulation method Lattice Boltzmann Method based on massand momentum conservations is used to simulate the complex fluid, in which Continuity andthe Navier-Stokes equations can be conformed.

作为一种介观模拟方法，格子玻尔兹曼方法在保证质量守恒和动量守恒的前提下，模拟的复杂流体能够满足流体力学中的连续性方程和 Navier-Stokes 方程。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。