Gaussian beam method is essentially a seismic forward modeling method that combines wave equation and ray theory.
高斯射线束方法是将波动方程和射线理论相结合的一种地震正演模型方法。
Based on complex ray theory, the Gaussian beams emitted by complex source points are employed to simulate the far-field pattern of antennas.
根据复射线理论，利用复源点高斯波束场来模拟天线的远场方向图。
The forward modelling method of wave equation is of a high precision and a lower computing efficiency compared with the ray theory based method.
波动方程正演模拟法相对于射线法具有精度高、效率低的特点。
Complex ray theory, based on geometrical optics, has been found to have many applications in areas of laser, microwave, acoustics, seismology etc.
以几何光学为基础的复射线理论已在激光、微波、声学和地震波等学科领域获得了广泛应用。
Planar ray theory is used to deduce the analytic solution of the elevation amplification effect on a single-free-face slope in seismic engineering.
利用平面射线理论和方法，推导出单面边坡地震的高程放大效应理论解，可用于描述边坡临空面对地震波的反射，反映边坡的高程放大效应。
The complex ray theory provides a simple and useful approach to analyze the propagation and scattering of HF EM waves in various complicated environments.
复射线理论为高频电磁波在各种复杂环境中的传播和散射提供了一种简便而有效的分析方法。
Also parabolic type equation commonly used now is derived from the hypothetic conditions of ray theory, so it does not include the wave natures completely.
目前通常采用的抛物型方程，也是在射线理论的假设条件推导的。所以，其波动性质也是不完全的。
In this paper, the method and principle of the shallow refraction seismic tomography for the ray theory is briefly expounded and applied samples are provided.
本文由射线理论出发，简要地阐述了浅层折射地震层析成像方法的原理，并给出了应用实例。
Here the measurement errors due to acoustic focusing of typical sound sources are analyzed by detailed examples based on the method of image sources in the Ray Theory.
基于射线声学的虚源法，通过具体算例，分析了典型声源声聚焦引起的测量误差。
Starting with waveguide ray theory, the condition for single-mode waveguide is derived, and design of single-mode strip waveguide is accomplished with effective index method.
从导波的射线理论出发，导出了波导单模条件，运用有效折射率法完成了单模波导的优化设计。
The ray theory of geometric optics was applied to visually investigate the propagation of quasi stationary waves in time mean basic flow and interpret the zonal nonhomogeneity.
应用几何光学中的射线理论，直观地讨论了准定常波在时间平均基流中的传播，解释了定常波传播的纬向非均匀性。
They used an orbiting X-ray telescope called Chandra to study the way that clusters of galaxies grow. They discovered that this growth is stifled in exactly the way that dark-energy theory predicts.
通过“钱德拉”X射线绕轨太空望远镜对星系团的增长模式进行观测研究，他们发现，正如“暗能量”理论预测的一样，星系团的增长受到了抑制。
The ray approach is adopted to study the acoustic field in theory, and the ultrasonic experiment has been carried out in laboratory to model the underwater waveguide.
理论上采用射线近似方法分析了时间反转声场特性，实验上在实验室内开展了水下波导的超声模拟实验。
From brief glimpses throughout the past decade, astronomers have pieced together a standard theory of gamma ray bursts.
在过去的整整十年中，天文学家们综合了所瞥见的爆发现象，创建了有关伽马射线爆发的标准理论。
Results of acoustic field prognosis on wave theory, normal model and ray model are compared, and the approximate degree of the later two models is given.
本文对比了波动理论、简正波声场和射线模型的声场预报结果，给出了后二种方法的近似程度。
For infrared optical systems a point spread function is calculated in terms of the spot diagram obtained through geometrical ray trace or the theory of Kirchhoff diffraction.
对红外光学系统，用几何光线追迹得到点列图或用基尔霍夫衍射理论计算得到点扩散函数。
Electromagnetic theory, statistical plane wave theory and the ray tracing theory of reverberation Chambers are studied in Chapter III.
第三章论述了混响室的电磁场理论、混响室平面波统计理论和混响室射线理论。
Most propagation models , which can be adapted micro cellcluar are theory method based on ray tracing method.
微区电波传播特性分析模型多是理论模型，采用射线追踪法，对源辐射情况进行模拟。
According to Kirchhoff's scalar diffraction theory, with the ray tracing method, a continuous relief mask for diffractive focus lens has been designed.
基于基尔霍夫标量衍射理论，采用光线追迹法设计了连续型平面衍射聚光透镜掩模。
This paper presents the theory of passive localization for underwater sources based on Acoustic Ray channel modelling.
本文论述以声线理论信道模型为基础的水声被动定位原理。
By the theory of ray optics, the bend losses of fiber as function of fiber parameters such as core index, cladding index, core radius and bend radius are set up.
利用光线理论研究光纤弯曲损耗与弯曲半径、纤芯折射中以及包层折射率的关系。
This paper introduces theory, characteristic, maintainer and preventability maintenance of contact and non-contact thickness gauge and ray source of that are described.
本文介绍了接触式测厚仪和非接触式测厚仪的工作原理、特点、保养及预防性维护，同时对非接触式测厚仪的射线源也进行了阐述。
The models of heat radiation field of brocken high voltage lines and of responding to its input with a infrared ray detector are set up by the theory of infrared radiation.
借助红外辐射理论，建立了破损导线的热辐射场和红外传感器对其输入响应的模型。
Ray path tracing is a key step to apply geometrical theory of diffraction in solving the problems of high frequency electromagnetic scattering and radiating.
在高性能微波暗室技术设计中，由于静区指标较高，采用一般的几何光学技术不能进行准确计算，因此需采用几何绕射理论技术。
Analytical expressions of groove parameters are derived up to the forth order with (ray-tracing) theory of geometry optics.
根据几何光学的光线追迹理论，推导了光栅参量的四阶解析表达式。
Based on diffraction theory a theoretical method for evaluating the three-dimensional focusing performances of the compound X-ray lenses is presented.
给出了基于衍射理论的评价X射线聚焦组合透镜三维聚焦性能的理论方法。
In Chapter 2, the refractive index distribution and ray trajectory of GRIN ball lens are studied in theory.
第二章主要从理论方面研究梯度折射率球透镜的折射率和光线轨迹。
In Chapter 2, the refractive index distribution and ray trajectory of GRIN ball lens are studied in theory.
第二章主要从理论方面研究梯度折射率球透镜的折射率和光线轨迹。
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