A two-ray model is used for the frequency selective fading channel.
频率选择性衰落信道采用了两径模型。
A geometric ray model for the propagation of light in a step fiber is presented, and the cut-off conditions are derived.
提出阶跃光纤导光的一种几何射线模型，方便地求出了截止条件，并与光波导理论所得结果作了比较。
A comparison between the wave and ray models shows that the ray model gives an approximation of the transmission loss in an acoustic vector field.
经过与波动理论的比较，说明该模型仅是矢量声场传播损失的简单近似。
Ray model is one of the conventional sound propagation models, which can be used to model the sound propagation in the irregular ocean environment.
射线模型是比较常见的传播模型之一，可以用于不规则海域声传播建模。
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。
The ray model is used to describe the low frequency acoustic field in shallow water. Applicability of this model in shallow water or deep water at low frequencies is checked.
采用射线理论对浅海低频矢量声场进行建模，并且分析了该模型在浅海或深海低频时的适用性。
CRT: Acronym for Cathode Ray Tube, the oldest commercial model of televisions and computer monitors.
阴极射线管的缩写，电视和电脑显示器所使用的最古老商业技术。
Ray Keim of Haunted Dimensions released an extremely cool paper model of the Disneyland Haunted Mansion in New Orleans Square.
射线闹鬼尺寸凯姆发布了迪士尼乐园幽灵鬼屋非常凉爽，新奥尔良广场的纸模型。
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。
This paper presents an effective radio wave propagation prediction model by using radiation sources tree for microcellular environment. This model is based on ray-tracing and UTD.
提出了一种有效的微蜂窝电波传播预测模型，该模型基于射线跟踪法和UTD理论，并使用辐射源树的方法。
On this condition, the paper put forward a new electric wave transmition model in the microcell , which based on ray tracing method of Virtual Fountain Tree.
在总结前人工作的基础上，本文提出了一种新的基于“虚拟源树”射线跟踪技术的微蜂窝小区的电波传播模型。
An outdoor propagation model based on ray tracking technology is presented to improve the practicability of ray tracking propagation model in wireless network planning.
针对射线跟踪技术在无线网络规划中实现的困难，提出了一种基于射线跟踪技术的室外传播模型。
Based on the atmospheric transmission model, through the actual ray track, the zenith Angle is revised, which is a complicated function with launch Angle and altitude.
基于大气传输模型，采用光线传输的实际轨迹对天顶角进行修正处理，得出天顶角随发射角和传输高度的变化复杂函数。
Full wave model phase analysis technique may involve wide subjects, but this paper only deals with the analysis methods of ray, amplitude, wave spectrum and particle vibration pattern.
全波模型震相分析法研究的内容是非常广泛的，本文仅对其中的射线分析、振幅分析、波谱分析、质点振动方式分析等方法进行了探讨。
Depolarization of imperfect metal orthogonal twin mirrors is studied by building a geometric model of the mirrors to change the direction of light ray.
通过建立非理想正交反射镜改变光线的几何模型，研究正交金属反射镜的消偏性能。
A simple model is presented for calculating the lower hybrid wave (LIIW) power deposit along the ray tracing and for obtaining the RF current profiles.
本文利用较简单的计算模型计算低杂波沿射线轨迹的能量沉积和电流分布。
The most accurate ray-tracing model is used firstly on the development simulation of resist exposed by electron beam.
在电子束曝光胶图形的三维显影模拟工作中，首次使用了最精确的三维线踪模型。
Objective To study the leukogenic effects on leucopenia model induced by X-ray and chemotherapy.
方法通过制备小鼠和家兔白细胞减少实验动物模型，观察香菇多糖的升白作用。
Using London's model, physics of X ray laser propagation and amplification in laser-plasma of the foil target is studied analytically.
对激光辐照箔靶产生的等离子体中X射线激光的传播和放大过程进行了解析的分析。
This paper presented a positioning model based on ray-tracing method.
提出了一种基于射线跟踪方法的定位模型。
Weld defects classification system based on fuzzy reasoning model was established, after analysis of weld defect features in X-ray films.
分析工业X射线底片焊缝缺陷特征，建立用于焊缝缺陷分类识别的模糊推理系统模型。
Objeclive:To establish a two dimensional finite element analysis model for hard tissue morphology on lateral cephalometric X ray film.
目的：建立X线头颅侧位定位片硬组织形态二维有限元分析模型。
A correction model for Angle drift in target area is established through ray-tracing target area light path of ICF (Inertial Confinement Fusion) driver.
通过光线追迹ICF(惯性约束聚变)驱动器的靶场光路，建立靶场角漂的修正模型。
The image method of equivalent energetic-spectrum is put forward, and applied in correcting the detector sensitivity by analyzing the mathematical model of X-ray radiography.
通过分析射线成像检测的数理模型，提出等效能谱透照成像方法，对探测器灵敏度进行校正。
A rapid and accurate method for two point ray tracing in horizontally layered velocity model is presented in this paper.
提出了一种快速准确的水平层状介质中两点间的射线追踪方法。
In this paper we have developed a program for three dimensional ray tracing of whistler-mode waves in which the IGRF model was adopted.
本文给出了采用IGRF模型的哨声模波三维射线跟踪方程，并概述了射线跟踪模型及数值计算程序。
Given an X ray image, the solid model of corresponding joint can be got through image processing, coordinate transform and primitive construction.
该方法利用一张X光片，通过进行图像处理、坐标变换和实体造型即可生成实体模型。
Given an X ray image, the solid model of corresponding joint can be got through image processing, coordinate transform and primitive construction.
该方法利用一张X光片，通过进行图像处理、坐标变换和实体造型即可生成实体模型。
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