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- forward velocity variation 地速误差
- The method is not limited in azimuthal velocity variation. 该法不受速度横向变化的限制。
- After applying this method to the forward modeling and migration of salt dame model, a better result than the conventional Born approximation migration method can be got. The ability of dealing with lateral velocity variation is greatly increased. 将改进的方法运用于盐丘模型的正演和偏移试验,并与常规Born近似偏移方法相比较,可明显看出变参考慢度Born近似傅氏偏移方法在效果上要优于后者,其处理速度横向变化的能力大大增强。
- The correction of an excessive velocity variation is not as serious a problem as the correction of excessive angular variation. 对速度变化过大时的修正问题不象对偏角变化过大时的修正那样重要。
- The assumption that there is no lateral velocity variation in a stratum is usually made in velocity analysis. 通常进行速度分析时仅设地层没有速度横向变化，但是实际情况并非如此。
- PEI Shunping, XU Zhonghuai, WANG Suyun. 2004. Discussion on origin of Pn velocity variation in China and adjacent region. Acta Seismologica Sinica. 裴顺平;许忠淮;汪素云.;2004
- The peak forward velocity(PFV),peak reverse velocity(PRV),acceleration time(AT),and deceleration time(DT) were determined and compared. 对正向波峰速（PFV）、反向波峰速（PRV）、加速时间（AT）和减速时间（DT）进行了测量和比较。
- The error analyses show that the error (approximate 0.02 km/s) at the focus area is far smaller than the magnitude (approximate 0.15 km/s) of velocity variation. 误差分析显示;在震源附近的误差(约0.;02km/s)远小于速度变化的幅度(约0
- However, because of unconspicuous velocity variation of base mode (HE11), it’s likely to overcome the aforesaid shortage in enough broad band and to assure less pulse widening. 但是，由于介质杆的基模(HE11)的相速度在很宽的频带内变化不大，有可能在足够宽的频带内克服以上不足。
- The wind velocity variation of different slope directions at coal gangue piles in Sunjiawan was studied with field measurement and statistical analysis. 采用野外观测与统计分析相结合的方法,对阜新市孙家湾煤矿矸石山不同坡向的风速变化进行研究。
- Cerebral blood flow recovery phase,peak forward velocity of end diastolic phase was nearly normal,Vs slowed downward gradually. Clinical prognosis of Nimodipine is much better than Citicoline group. 脑血流恢复期 ,舒张末期峰流速度趋于正常 ,vs则逐渐回落 ,尼莫地平组症状消失率、治愈率和预后明显优于胞二磷胆碱组。
- The tests demonstrate that our method can be used to image complex geological structures correctly with the lateral velocity variation ratio in two times, big fault with 3km throw and 60 degrees dip layer. 试验结果表明,本方法可以解决速度比值达2倍的横向突变和断距3km的断层、地层倾斜高达60°的复杂地质体的正确成象问题。
- Pujol, J., 1992.Joint hypocentral location in media with lateral velocity variations and interpretation.Phys.Earth.Planet.Interiors., 75, 7-24. 郑世楠、叶永田、徐明同、辛在勤，1999.;台湾十大地震灾害图集，交通部中央气象局与中央研究院地球科学所。
- Comparing to the published VTI migration methods, our method requires less memory storage, computes fast, and can handle strong lateral velocity variations. 同已有的各种VTI介质单程波偏移方法相比，该方法计算时占用内存小、速度快，且能对速度剧烈变化地区的地质构造比较精确地成像。
- My foot caught in a creeper and I pitched forward. 藤蔓缠住我的脚，使我向前倒下。
- Einstein put forward his new theory of relativity. 爱因斯坦提出了相对论的新学说。
- We look forward to the return of spring. 我们期待着春天的到来。
- Many activists have come forward. 涌现了大批积极分子。
- Particle Velocity Variation along Shaped Charge Jets 一个新的射流颗粒速度差公式
- They looked forward very much to seeing him again. 他们非常盼望再次见到他。
