电磁场

The structure of electromagnetic stirrer applied in steel refine and continuous casting will be changed due to the working condition.

应用于钢精炼与连铸工艺中的电磁搅拌器，因场合与条件的不同，搅拌器结构也有所变化，利用商业软件 ANSYS10.0软件对异型结构电磁搅拌器的电磁场和电磁力进行了模拟分析。

One scientist, Dr. Sydney Chapman, has tried to explain the electric field which surrounds the earth.

有位科学家，悉得尼 o 查普曼博士，试图解释包围了地球的电磁场。

Sydney Chapman, has tried to explain the electric field which surrounds the earth.

科学家悉尼查普曼博士试图解释包围着地球的电磁场。

Second-order field and circuit coupled calculation formula and software are developed where the symmetrization of coefficient matrix is realized.

包括， a。将叠层元技术引入到瞬变电磁场的分析中，并提出了二阶叠层元场路耦合仿真计算格式及软件，在该格式中实现了系数矩阵的对称化。

Making use of the inverse surface equation of wave normals and the boundary condition about the continuity of electromagnetic field tangential component at the surface of crystal, expressions about wave normal and ray direction, wave normal and ray refractive indexes were obtained.

论文建立了以光线入射方向和晶体光轴方向为基准的入射坐标系，利用波法线反曲面方程和电磁场在晶体折射界面处切向分量连续性的边界条件，得到了晶体中波法线方向、射线方向、波法线折射率和射线折射率的表达式。

The linear transient eddy current electromagnetic field problem for determining solution is characterized by replacing the interface condition of the tangential component of the electric field intensity by the interface condition of the normal component of the magnetic flux density, and ignoring the displacement current in the constraint equations.

谢莉 北京航空航天大学自动化科学与电气工程学院，北京 100083雷银照北京航空航天大学自动化科学与电气工程学院，北京 100083线性瞬态涡流电磁场定解问题的主要特点是边界条件使用磁感应强度的法向分量边界条件代替了电场强度的切向分量边界条件，约束方程中忽略了位移电流。

The great attention has been devoted to the research of transient electromagnetic field with the development of science and techno...

随着人类社会和科学技术的发展，对瞬变电磁场的研究，越来越受到人们的重视。

Based on orthogonal function unfolding theory, the transverse fields can be represented as a superposition of waveguide modes. And according to coupled-wave theory, the time-dependent multi-mode coupling-wave equations (or the generalized telegrapher's equations) and the coupling coefficients among the different modes were deduced. The generalized telegrapher's equations are a set of coupled one-dimensional partial differential equations for the amplitudes of the modes.

应用正交函数的展开理论，将变截面波导中的电磁场表示为横电波和横磁波本征模式的级数；然后根据耦合波理论，推导了考虑波导金属壁有限电导率的变截面波导时域多模耦合波方程组及各模式间耦合系数的表达式。

High order symplectic schemes of three-dimensional time-domain Maxwell's equations are constructed with symplectic integrator technique combined with high order staggered difference. The method is used to analyzing stability and numerical dispersion of high order time-domain methods and symplectic schemes with matrix analysis and tensor product.

利用辛积分技术与高阶交错差分技术，建立求解三维时域Maxwell方程的高阶辛算法；结合电磁场中的物理概念，借助矩阵分析和张量分析理论，获得高阶时域方法及高阶辛算法的稳定性和数值色散性的统一处理新方法。

By introducing the SU(2) field strength tensor, we can easily obtain the spin force which reduces to the Stern-Gerlach force.

当只有U(1)电磁场时，该自旋力会简单地退化为Stern-Gerlach力。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。