查询词典 free space

Second, based on the spherical vector wave function in uniaxial anisotropic medium, and the first, second, third and fourth spherical Bessel functions satisfy the same differential equation and recursive formula. The scattering fields in terms of spherical vector wave function from a uniaxial anisotropic spherical shell and an anisotropic uniaxial-coated conducting sphere by a plane wave are derived. The electromagnetic fields in uniaxial anisotropic medium and free space can be expressed in terms of spherical vector wave functions in uniaxial anisotropic media and isotropic medium.

二、在建立均匀各向异性单轴介质球矢量波函数理论的基础上，利用二阶线性偏微分方程的性质和第一、第二、第三和第四类球Bessel函数满足相同的微分方程和递推关系，我们分别研究了单轴介质球壳和单轴介质涂覆导体球对平面波的电磁散射特性，首先给出了各个区域的电磁场用球矢量波函数来表示的解析表达式，进而利用电磁场在边界上满足电磁场切向连续的边界条件和球谐函数的正交性，得出了各向异性单轴介质球结构中电磁场用球矢量波函数表示的系数所满足的矩阵方程。

HTX- website builds: How my forum didn't develop, just give free space a room of user communication.

HTX-网站建设：我的论坛没怎么去发展，只是给免费空间用户交流的一个场所。

"What makes these different from conventional electronic networks," he said,"is that instead of thinking in terms of a conduction current, one should think in terms of the displacement current, which indeed can 'flow' in free space and in dielectric materials."

他解释道：&之所以会产生这些与传统电子网络不同的概念，原因是我们不是从传导电流的角度而是从位移电流的角度进行考虑的，位移电流确实可以在自由空间和在电介质材料中流动。&

Based on the beampropagation equation in free-space, the hyperbolic-fit mothed is used to calculate theM2-factor of Gaussian beams passing through a spherically aberrated lens.

根据自由空间束宽的传输方程，采用双曲线拟合的方法，计算了高斯光束通过球差透镜后的M2因子。

In this dissertation, based on the beam propagation equation in the free-space, the hyperbolic-fit mothed is used to calculate the M2- factor of Gaussian beams passing through a spherically aberrated lens for the first time.

本论文根据自由空间中光束的传输方程，利用多点拟合的方法，通过数值计算，首次研究了激光束通过球差透镜后的M~2因子随球差的变化规律，并用M~2因子、桶中功率和K参数作为光束质量评价参数，讨论了透镜的像差、遮拦比等对激光光束质量的影响。

We find that optical vortices could be efficiently formed and generated due to the interference and superposition effect of all the beamlets, during the propagation process of the coherent radial laser arrays with the initial well-organized phase distributions through the free space, the resulted beam in the far field has the strong rotation effect with the phase helicity.

我们发现具有确定初始相位的、圆径向对称分布的相干激光阵列光束在传播的过程中由于干涉和叠加效应可以形成螺旋形的位相分布且保持光束中心强度为零，即形成光涡旋。

In the chapter 3, The DDM-CM is used to get simple expressions for inductance of planar spiral inductors in the free space.

第三章利用DDM-CM理论首先研究了自由空间中的平面螺旋电感的电特性，即计算了平面螺旋电感器的电感值。

In cgs units, a magnetizing force gives rise to a flux density or field, with the units being equal in magnitude if in free space.

在厘米-克-秒单位制中，磁化力在自由空间中产生等量的磁通密度或场强。

Then we will see the hard disk has more than a few hundreds of megabytes of free space.

随后我们再查看硬盘已经多了几百兆的剩余空间了。

The momentum dependence of the masses of mesons is differentfrom that for the NJL model either in the free space or in nuclear medium.

无论是在自由空间还是在核物质中，在目前模型中的介子质量的动量依赖性与NJL模型中的不同。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。