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Gaussian beam (GB) method is a high-frequency asymptotic method of computing wave-fields in inhomogenous media. 高斯射线束(GB)方法是一种用于计算不均匀介质中波场的高频近似方法。
The necessary conditions for construction of normal vector wave functions in inhomogeneous media with graded refractive index are studied. 研究了在渐变折射率介质中构成标准矢量波函数的必要条件。
Based upon a vectorial identity, an integral equation system concerning electromagnetic field in inhomogeneous medium is derived. 计算三维不均匀介质中测井响应的最常用的方法是有限元素法和有限差分法。
The drift of wind and rain in the air and the existence of inhomogeneous medium make the locus of lightning behaving as irregular curve. 风雨在空中的漂移和空气中不均匀介质的存在使闪电的轨迹呈不规则曲线形。
Using the updating formula, the measured apparent conductivity of the inhomogeneous media obtained from the model can be updated.Thus the influence of the metal mand... 利用修正公式，可将含金属芯棒线圈系实测的非均质地层视电导率进行修正，从而在反演之前将金属芯棒的影响扣除。
In order to study laser propagation in inhomogeneous medium, Collins formula was improved by using time inversion characteristic of optic phase conjugation wave. 摘要为了解决非均匀介质中的光传输问题，利用光学相位共轭波的时间反演特性，实现了对克斯林衍射积分公式的改进。
The nonlinear integral equation is first linearized by using Born approximation, and then the measurements are used to reconstruct the twodimensional inhomogeneous media by using the Born iterative method and the distorted Born iterative method. 首先借助于玻恩近似将非线性积分方程线性化，然后，利用玻恩迭代法和变形玻恩迭代法，由散射场数据对轴对称二维非均匀介质进行重建。
English is not the usual medium of instruction in our school. 英语不是我校通常使用的教学语言。
Numerical migration for typical models show that, in contrast to ray method, prestack wave motion migration can correctly image inhomogeneous media, and suppress multiple reflection wave effectively. 典型的介质模型数值分析表明，与射线方法相比，接收函数的波动方程叠前偏移能对横向非均匀介质准确成像，不仅有较高的分辨率，而且对多次波有较明显的压制作用。
In this paper the numerical solution of Green's function of potential in 2-D arbitrary inhomogeneous media with axial symmetry has been given by using the numerical mode matching(NMM) theory. 利用数值模式匹配理论，对具有轴对称的任意二维非均匀介质中位场的格林函数给出数值解。
The media have a lot of power today. 现在大众传播媒介有很大的力量。
A novel inverse iteration method, variational Born iteration method (VBIM), for the inversion and reconstruction of two-dimensional axisymmetic inhomogeneous media is described in this paper. 摘要提出了用于二维轴对称非均匀介质结构的反演和成像的一种新的反演迭代方法-变分玻恩迭代方法(VBIM)。
The wedding got massive media coverage. 婚礼得到大众传播媒介的广泛报道。
A wise candidate should have the media in hand. 一个明智的候选人应该把传媒控制在手中。
An ASCII control character, end of medium. 一种ASCII码控制字符，媒体结束符。
This cloth is of medium quality. 这种布质量平平。
The fracture-vug reservoir in carbonate rock may be regarded as a kind of complicated inhomogeneous medium made up of various low speed bodies, which are random and has different size and form. 摘要碳酸盐岩洞缝型油气藏可以看作是由准均质介质中随机分布大小形状各异的低速体共同组成的复杂非均匀介质。
This paper proposes a new seismotomographic method to determine the velocity distribution and positions of the interfaces in a laterally inhomogeneous medium using seismic travel time data. 本文提出了一种横向非均匀介质中的地震层析成象方法，由地震走时资料确定介质的速度分布和界面位置。
Mass media is very important for advertisements. 大众媒介对广告来说很重要。
He prefers a happy medium in life. 他在生活中甘居中游。