连续性方程

From Maxwell's equations, with material constitutive relation of optically active crystal and boundary conditions of electric field on the boundary between isotropic media and crystal, through coordinate transformation, the formula of the direction of refracted wave for arbitrary direction incident monochromic plane wave was derived. Furthermore, based on the unit vector of direction of refracted wave, eigen waves of electric field, electric displacement vectors and direction of energy flow can be easily obtained.

从麦克斯韦方程组出发，结合旋光晶体的物质方程以及单色平面波从各向同性介质入射到晶体界面时电场的连续性边界条件，通过晶体主轴坐标系和界面坐标系的坐标变换，推导了任意入射方向的单色平面波在晶体界面上的折射方向的求解公式，进而利用所得的折射方向求解晶体中折射波的电场本征模、电位移矢量本征模和光线方向。

Because of the method of Hamilton semi-analysis solution of the thermo-elastic problem of composite laminates has not any assumptions in the direction of thickness, the continuous conditions of the interlaminated stress and deformation are content. The interlaminated stress and the deformation of the laminates can be obtained through solve the state equations by analysis.

由于复合材料层合板热弹性问题的Hamilton半解析法，在板厚度方向不引入任何假定，保证了层合板层间应力和位移的连续性，通过对状态方程解析求解得到层合板的层间应力和位移。

Various influence factors of solid boundaries on discontinuuties in the gas molecular distribution function are considered and a bimodal two-stream relaxing distribution is suggested.

分析了固体边界对分子分布函数不连续性的各种影响因素；提出了双峰二向流弛豫分布，将它应用于麦克斯韦输运方程以研究二平行平板间的热传导，得到了封闭解。

The crack is modeled by distributed line spring ,the local compliance matrix of which is determined according to fracture mechanics.

管道的振动用Flügge方程来描述，通过将裂纹模拟为分布的线性弹簧，运用断裂力学理论，得到裂纹区域的局部柔度矩阵，从而建立外力作用处以及裂纹两侧区域的位移和内力的连续性条件对裂纹管道的功率流进行求解。

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。