地震射线

根据定位结果，计算了地震射线的离源角，用观测到的P波初动方向资料在SCHMIDT网上绘制了方向分布图，作出了一组节面。

Based on the location results the off-source angle of seismic ray was calculated , the direction distribution was plotted on SCHMIDT net by observed P wave onset directions , and the nodal plane was suggested .

根据Snell定律提出了透射射线的非线性效应的概念，从理论上证明了当地震射线的轨迹在1个界面上为1条直线时在另1个界面上可为1条曲线；

The nonlinear effect of transmitted rays is presented based on Snell'slaw . It is theoretically proved that when a seismic ray trajectory is a straight line on an interface it may be a curve on another interface .

由地震射线和电磁波射线组成的射线层析成像技术（CT）在地学领域已得到了广泛的应用。

The ray path tomography composed of seismic and electromagnetic waves , is widely used in the geophysical prospecting .

提出一种对旅行时进行抛物线插值的地震射线追踪方法（简称PTI方法），它比基于旅行时线性插值方法（简称LTI方法）计算结果更准确。

A new seismic ray-tracing method was put forward based on parabolic travel-time interpolation ( PTI ) method , which is more accurate than the linear travel-time interpolation ( LTI ) method .

本文介绍并实现了一种由Asakawa提出的基于旅行时线性插值的地震射线追踪算法（简称LTI算法），并在此基础上提出了反射波LTI算法。

In the paper , we introduce and implement a seismic ray tracing algorithm based on the linear travel-time interpolation put forward by Asakawa ( called LTI algorithm for short ) . On the basis of these , the reflected wave LTI algorithm is proposed .

井间地震射线层析成像的分辨率讨论

A discussion on resolution of cross - hole seismic ray tomography

地震射线追踪法的模型研究与应用

The model study of the seismic ray tracing method and its application

对旅行时进行抛物型插值的地震射线追踪方法

Seismic ray-tracing method of applying parabolic Interpolation to travel-time

地震射线辛几何算法初探

An attempt to seismic ray tracing with symplectic algorithm

具有间断面的球形地球三维地震射线追踪的伪弯曲法

Pseudo-bending method for three-dimensional seismic ray tracing in a spherical earth with discontinuities

在不同阶段，穿过同一路径的地震射线其波速比和S波分裂特征不同；

In different time stages , characteristics of VP / Vs and shear wave splitting are different for the same ray path ;

基于初始的每个网格点的位置和速度，通过地震射线追踪方法正演得到理论走时。

The seismic ray tracing method is used to get the theoretical time according to the location and original velocity of each gridding point .

综述了用网络最短路径算法求解地震射线追踪问题的原理、方法技术以及存在问题和改进措施。

The principle and method of seismic raytracing with shortest path algorithm in networks are discussed , the relevant drawbacks in which and improved measures are also analyzed .

井间地震高斯射线束正演方法

Forward modeling by Gaussian beam method in crosswell seismic

该方法是利用地震波射线的走时和路径，反演介质速度结构的一种高精度的反演方法。

The technique is high resolution inversion using travel time and path of seismic ray for inverting the velocity structure of medium .

那么地震波射线经过的路径是从此深度到地表台站，平均波速比所反映的是地壳上层的状态。

The path of seismic wave ray was from this depth to the surface station , and the state that mean VP / VS ratio reflected was that of the upper crust .

文中介绍了各向异性介质中地震波的射线解，并利用运动学射线追踪方程计算了裂隙介质中波的射线轨迹及走时曲线，求出似P波、似SH波和似SV波的波速。

The ray solution of seismic wave in anisotropic medium is described . The ray path and travel time curve of seismic wave in fractured-medium are calculated using kinematic ray - path equation , and the velocities of quasi-P wave , quasi-SH wave and quasi-SV wave are obtained respectively .

受逆掩推覆高速体的影响，地震反射波射线路径发生严重畸变，在逆掩断层下盘产生断层阴影、虚假构造或构遣高点偏移等现象，给构造的解释与成图带来了困难。

However , the ray path of seismic reflected wave in this region distorts seriously due to the effects of overthrust high speed layers , which make it difficult to interpret and image the structures .

地震井间曲射线反射加透射层析（CCRTT）

Seismic Crosshole Curved Ray Reflection & Transmission Tomography ( CCRTT )

应用实际煤田地震数据对GCSP射线追踪动态校正方法进行检验，结果表明该方法有效地消除了近地表影响，明显改善了叠加剖面煤层反射波连续性。

Finally GCSP ray tracing dynamic correction method is tested by real coalfield seismic data , the results shows that the effect of near surface is eliminate effectively and the continuity of coal seam reflection events are enhanced extraordinarily in the stack profile .

地震波走时和射线的有限差分计算

Finite-difference calculation of travel times and rays of the seismic wave

不同速度模型条件下地震波走时的射线追踪计算

Calculation of travel-time of ray tracing in different velocity models

地震初至波射线路径的追踪

Raytracing for seismic first arrivals

为此，根据目前静校正存在的问题和实际需要，进行了地震初至波射线层析成像方法的研究。

Tomography imaging method from seismic first-arrival ray is studied on the problem in static and its development .

虚拟速度&临界角谱是地震折射波虚拟射线理论的应用之一。

The Ghost Velocity-Critical Angle Spectrum is one of the applications of the ghost ray theory of seismic refraction .

表层模型层析反演是一种非线性模型反演技术，它利用地震初至波射线的走时和路径反演介质速度结构，不受地表及近地表结构纵横向变化的约束。

Surface model tomography inversion is the technology about non-linear model inversion , which applies the media velocity structure built by the inversion of travel time and path of seismic first arrival ray , without being restricted by longitudinal and latitudinal diversification of surface and near surface structure .

垂直方向的网格划分主要是依据研究区域的速度模型；水平方向的网格划分主要依据是研究区域内台站和地震的分布以及地震射线的覆盖情况。

The grid division in vertical direction is based mostly on the velocity model of the research area , and the grid division in level direction mostly by the distribution of the stations , earthquakes and seismic rays in the research area .

井间地震层析成象中地震射线的求取

Determination of seismic ray in cross-well seismic tomography

在井间地震层析成象中，地震射线的求取是项很重要的工作。

In cross - well seismic tomography , to determinate the seismic rays is a very important thing .