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Fast Explicit FD Time Migration. 二维快速显式有限差分时间偏移。
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.
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。
Formation fluid migration after cementing as hydraulic pressure loss due to cement slurry shrinkage and gelatinization weightlessness is the one of main causes to effect cementing quality. 注完水泥后因水泥浆体积收缩和胶凝产生失重导致地层流体窜流仍然是影响固井质量重要原因之一。
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。
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。
Minimum volume after stacking ensures that this bed is always ready to be lugged along. 堆砌之后的最小空间占据保证了这个床总是能被拖着走。
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。
After some time he returned to his old habit. 过了一些时候，他又故态复萌了。
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。
He time after time gambled away his money. 他经常赌博，把钱输个精光。
An implementation of Kirchhoff prestack time migration output parallel pattern is studied.The design and implementation of two prototypes based on the pipelining method are presented. 针对某克希霍夫叠前时间偏移并行模式实例，提出了2种基于该改进方法的原型的设计与实现，从而提高了该实例性能。
In addition, we also discussed the algorithm for 3-D pre-stack time migration of converted-wave in VTI media.The validity of pre-stack time migration method is verified by a theoretical model. 同时，讨论了基于VTI介质的三维转换波叠前时间偏移近似算法，利用理论模型验证了叠前时间偏移方法的正确性。
After retirement, I'll be master of my time. 退休后，我可以自由支配我的时间了。
Firstly, the T0 layer data of post-stack time migration domain (abbreviated in migration domain) was de-migrated into common-depth-point-stacking time domain (abbreviated in stacking domain). 首先将叠后时间偏移域（简称偏移域）的T0层位数据反偏移（偏移的逆运算）到水平叠加时间域（叠加域）；
Fruit juices ferment if they are kept a long time. 果汁若是放置很久，就会发酵。