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- Pre-- stack time migration 叠前时间偏移
- Post Stack Time Migration 叠后时间偏移
- Fast Explicit FD Time Migration. 二维快速显式有限差分时间偏移。
- In this paper we discuss the difference and relationship between CRP and CRS stacking, NMO/DMO stacking, as well as pre stack depth migration(PreSDM) and CRS stacking in a geometrical viewpoint and on the hypothesis of constant velocity media. 以几何描述的方式 ,在常速介质假设下通过图示定性描述CRP与CRS叠加之间 ,NMO/DMO叠加、叠前深度偏移 (PreSDM )与CRS叠加之间的区别与联系。
- The year footsteps along with time migration, we slowly grow up from the childhood world. 岁月的脚步随着时间移动，我们从童年的世界慢慢长大。
- The paper summarizes some methods of prestack time migration for converted wave in isotropic and VTI medium. 本文对各向同性介质和VTI介质中的转换波叠前时间偏移方法进行了总结和归纳;分析了每种方法优缺点和适用条件.
- Keywords Common shot gather;Pre stack depth migration;Paraxial wave equation;Finite difference;Frequency space domain.; 共炮道集;叠前深度偏移;傍轴近似方程;有限差分;频率-空间域;
- The authors illustrated in detail the process of 3D prestack Kirchhoff time migration from the point of application. 从应用的角度较详细地论述了三维叠前克希霍夫时间偏移的过程。
- In order to improve the imaging quality of sandy conglomeratic body, prestack time migration was used in this area. 为了使砂砾岩体的成像效果更加理想，在该区进行了叠前时间偏移应用研究。
- Poststack time migration often fails to yield desired images because of complex deep geology in Xingcheng area in the north of Songliao Basin. 摘要松辽盆地北部兴城地区深层地质条件复杂，地震资料常规叠后时间偏移处理不能获得理想的成像效果。
- Fourthly, the prestack time migration is introduced in AVO inversion to improve AVO techniques to meet the needs of the gas/water prediction of high steep complicated structure. 第四，针对高陡复杂构造的特点，在AVO反演中引入了叠前时间偏移的思想，将AVO技术进行了改进，有效地适应了高陡复杂构造的气水预测；
- Conclusion: It Indicated that the reason for drug abuse and the type of drug to abuse has the trend of Time migration, Suppressing drug education and related soc... 结论:吸毒原因和滥药类型有较明显的时代迁移特征,提示青少年禁毒教育和戒毒社会服务工作需要紧跟步伐。
- How much do all these figures stack up to? 这些数字的总和是多少？
- In order to hide IO and communication latency and to improve performance of Kirchhoff prestack time migration parallel pattern, an enhanced method through pipelining is adopted. 摘要为了隐藏IO和通信延迟进而提升克希霍夫积分叠前时间偏移并行模式的性能，采用了一种流水线改进方法。
- AVO analysis is conducted using CRP trace gather generated from prestack time migration instead of CDP trace gather, so the shortcoming of CDP trace gather is overcome, AVO attributes are in proper offset, and the boundary of gas reservoir is more clear. 利用叠前时间偏移产生的CRP道集代替CDP道集作AVO分析,克服了CDP道集的不足,使AVO属性得到偏移归位,气藏边界更加清楚。
- Compared to poststack time migration, prestack time migration results in clear images of fractures and cavities in the Ordovician carbonate rocks, and definite unconformities at top of the Ordovician. 叠前时间偏移与叠后时间偏移结果相比，具有丰富的奥陶系碳酸盐岩裂缝－溶孔内幕，清晰的奥陶系顶不整合面。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久，就会发酵。
- Time is sometimes called the fourth dimension. 时间有时被称为第四度空间。
- I think the work can be completed ahead of time. 我认为这项工作能提前完成。
- He will come on time even though it rains. 即使下雨，他还是会准时来的。
