绕射波

且只有当界面的粗糙波长与地震波的波长相当时，才能观测到这类绕射波。

And only when the rough wavelength of the interface is similar to the wavelength of seismic wave , diffraction can be observed clearly in the seismic record .

VSP中绕射波形态的理论分析

Theoretical analysis of diffraction wave pattern in VSP

本文例举油藏中有代表性的地质结构，对VSP中波的轨迹关系进行分析，从理论上给出了VSP绕射波的一般认识规律。

The typical geological structures of oil pool are enumerated ; the track bearing for VSP is examined ; and general rules for identifying VSP diffracted wave are given in theory .

在探地雷达（Ground-penetratingradar，简称GPR）剖面中，由于绕射波的存在，使得资料的处理解释十分困难，其结果的准确性与真实度也会降低。

Due to the interference of diffraction waves , the processing and interpretation of Ground Penetrating radar ( GPR ) data will become difficult and the precision and reality of their results will be also reduced .

论文第一部分利用Floquet模一边缘绕射波一矩量法混合方法研究有限带栅结构的散射问题。

In the first part , Floquet mode - edge diffracted waves - method of moment hybrid algorithm is used for researching the scattering field from grating arrays .

马永生：VSP中绕射波的理论研究初探，《石油地球物理勘探》。23（4）1988：468～473467VSP资料中包含有多种信息，即构造信息，地层信息和绕射波信息等。

Ma Yongsheng : The initial theoretical approach of diffraction in VSP data , OGP , 23 ( 4 ) 1988:468 ~ 473,467 VSP data contains some kinds of information : structure informa - tion , stratigraphic information and diffraction information etc.

把AMO应用于一束实际三维地震数据处理，经AMO处理后的剖面绕射波和断面反射波得到了加强，其效果是令人满意的。

AMO has been applied to a swath of 3 D practical seismic data processing and satisfactory results have been gotten , which have enhanced the diffractions and the reflections from fault plane .

本文针对一维和二维有限阵列的电磁特性分析问题，研究了Floquet模一边缘绕射波一矩量法混合方法和边缘积分方程法。

In this article , Floquet mode ( FM ), edge diffracted waves ( EDW ) and method of moment ( MoM ) hybrid algorithm and fringe integral equation ( FIE ) method which are applied to analyse finite array are studied .

线性绕射波理论的直接边界积分方程及其数值处理

Direct boundary integral equation and numerical model of linear diffraction wave theory

绕射波在坑道中超前探测小构造的应用

Application of diffraction wave to probing small structures ahead stope face in tunnel

绕射波物理性质的研究

A study of the physical properties of diffracted waves

内幕岩溶储层的发育，是引起地震绕射波振幅变化的主要原因。

The development of insider karstic reservoir caused amplitude change of seismic diffraction wave .

绕射波的叠加效应分析

Analysis of stack effect of diffracted waves

论绕射波机制

The mechanism of diffracted waves

但由于此两种方法的波散现象，存在绕射波收敛不完全等问题。

Merely the wave dispersion , the convergency of diffracted wave is , in most cases , incomplete .

在探地雷达的实测资料中，由于绕射波的存在导致了地下结构图象显示不清。

In ground-penetrating radar profile , the image of subsurface structure is distorted and unfocused due to diffractions .

结果获得了相当清晰的P&SV转换波，并首次获得了转换绕射波。

Not only quite clear P-SV waves are recorded but also converted diffractions are obtained for the first time .

本文讨论一项用以研究折射绕射波的三度空间超声波模拟实验的结果。

This paper deals with the results of a three-dimensional ultrasonic wave model experiment designed to study the mechanism of refractional diffracted waves .

实验证明绕射波存在正、负两个半支。

Experiments also proved that the diffractions consist of two parts , one of them is positive , and the other , negative .

根据雷达图像特点设计了抑制双曲线的模板，结果表明其能有效的抑制雷达剖面中的绕射波。

Moreover , a kind of hyperbola suppression filtering is designed and experimental result shows its efficiency on suppressing diffracted waves in PGPR profiles .

文中提出绕射波的运动学特征，从中可以提供一些有关断层或绕射棱结构的情况。

It is pointed out , that the kinematic nature of diffracted waves will give some idea about the structure of fault or diffraction wedge .

剖面上水动力系数按刘易斯剖面法计算得到。波浪外载荷按线性艾立波理论及其绕射波理论得到。

The hydrodynamic coefficients are calculated by Lewis section method , and the wave disturbing load is obtained through Airy linear theory and scattered wave theory .

动态规划模型通过选择适当的叠加速度函数初值及其相应的变化区间可减弱多次波、绕射波和其他形式干扰波的影响。

The dynamic programming model can weaken the effect of multiple , diffraction and other noises by choosing proper initial stacking-velocity function and the corresponding range .

提出了对绕射波由数模确定，而传递波由物模确定的一种复合计算方法。

A hybrid calculation method is proposed in the present paper , in which the diffracted and transmitted waves are determined by numerical and physical models respectively .

在前人有关陷落柱延迟绕射波的研究基础上，进一步研究了陷落柱与断层、褶曲、地堑等的区别。

Further study is made to distinguish collapsed pole from fault , fold and graben on the grounds of previous research about delayed diffracted wave from collapsed pole .

以线性绕射波理论为基础，采用边界积分方程中直接法计算大尺度圆柱结构上的波浪力。

The computation of wave force on a large circular cylinder structure using the direct method of boundary integral equation is presented based on the linear diffraction wave theory .

基于绕射波场的解，文中给出了任意形状空腔动应力集中系数的一般算式。

Based on the solution of the diffracted wave field the general formulas for calculating dynamic stress concentration factor for a cavity of arbitrary shape in multiply-connected region are given .

偏移处理能使倾斜反射层归位到它们真正的地下界面位置，并使干涉带分解，绕射波收敛，从而提高横向分辨率。

Migration process can make the incline reflection migrate to its true underground interface , making analysis of interference zone , making diffraction convergence , thereby can improve the transverse resolution .

可以用这个宽度-振幅因子从对无限宽溶洞计算的绕射波计算有限宽度的溶洞的绕射振幅。

We introduce a width-amplitude factor which can be used to calculate the diffraction amplitude of a cavern with a limited width from the diffraction amplitude computed for an infinitely wide cavern .

得到其他自由度运动对横摇的非线性耦合系数表达式，以及入射波和绕射波对横摇扶正力矩的非线性影响。

The expressions for the coupling coefficients of other motions to rolling equation are derived , and the nonlinear effects of restoring moment caused by incident and diffraction waves are also included .