延拓算子 meaning in English
continuation operator
Examples
- In this paper , a " step - by - step " recursive 3 - d frequency - space wed scheme is presented to deal with real data
本文采用三维频率空间域有限差分波场延拓算子以“逐步累加”的方式实现了三维波动方程基准面校正，并对实际数据进行了处理。 - The second step , on the base of the first step , the paper designs seven practical models which bases on the practical information of the seismic , by the same way the paper gets the record of the forward and the profile of the migration
第二步，在第一步的基础之上建立了七个实际碳酸盐岩缝洞储层缝洞模型(由实际地震资料确定的) ，同样利用高效的波场延拓算子对七个模型进行了正演模拟和偏移处理。 - The dissertation focuses on seismic wavefield forward modeling and migration for the fractured reservoir . the paper integrates and researches the wavefield extrapolation operator for lateral variation of velocity , analysis of the wavefield characteristic , forward modeling and depth migration of prestack and poststack seismic wavefield , creation of wavelet , design of the model with fracture and cavity , and computation of reflectivity
本文围绕缝洞储层地震波场正演与偏移问题，对横向变速波场延拓算子；叠前与叠后正演模拟；叠前与叠后深度偏移；子波的生成；缝洞模型的设计、反射系数的求取、正演、偏移及其波场特征分析进行了一体化研究。 - In term of analyzing and summarizing the existing achievement , propose an advanced and practical wavefield extrapolation operator and arithmetic of forward modeling and migration , which obtain numerical simulation and analysis completely and systemically and exploited new field of fractured reservoir seismic wavefield numerical simulation and applicationin in frequency - wavenumber domain
在总结、分析前人研究成果的基础上，提出了具有前瞻性和实用性的波场延拓算子与正演、偏移算法，较系统全面地进行了数值计算与分析，开辟了频率?波数域缝洞储层地震波场数值模拟与应用的新领域。 - A hybrid migration method , named " fourier finite - difference migration " , is a post - stack depth migration scheme . the downward extrapolation operator is split into three operators : one operator is a phase - shift operator for a chosen constant background velocity , another operator is the well - known first - order correction term , and the third operator is a finite - difference operator for the varying of the velocity function . phase - shift downward extrapolation and finite - difference downward extrapolation preserves the advantage of phase - shift method and finite - difference method
傅立叶有限差分(简称ffd )偏移算法是一种叠后深度偏移算法，其向下延拓算子是一种混合算子，包括三项：一项是处理常速的相移算子，一项是一阶相移修正算子，最后一项是类似45度方程的有限差分算子，用来处理剧烈横向变速。