| 1. | The maximum surface velocity near the center is somewhere between one and two feet per day .
靠近中心的最大表面流速为每天大约12英尺。 |
| 2. | Distribution and calculation of surface velocity field in ship wakes of sar image
合成孔径雷达图像中舰船航迹表面速度场的分布与计算 |
| 3. | Rebuilding near - surface velocity field is very important for calculating statics
摘要近地表速度场的重建是获得准确静校正量的关键。 |
| 4. | The maximum surface velocity near the center is somewhere between one and two feet per day
靠近中心的最大表面流速为每天大约1 2英尺。 |
| 5. | Based on the acoustic radiation mode analysis , the transfer matrix relating the pressure at every field point to normal component of surface velocity is formed
摘要基于声辐射模态分析，建立了外部场压和结构表面振动速度之间关系的传递矩阵。 |
| 6. | The paper proposed the methods of multi - azimuth inverse vsp tomography to calculate near - surface velocity aimed replacing micro - log method at complex surface places
本文首先就复杂地表常规微测井技术求取表层速度存在的问题，提出了多方位角逆vsp层析成像方法。 |
| 7. | Real - time surface velocity field measurement system and three - dimensional particle velocity measurement system are developed . systematic experimental research on the movement of coarse sediment particles in open - channel flows was carried out using developed system
本文研制开发了表面流场实时测量系统和颗粒三维运动测量系统，并采用颗粒三维运动测量系统对明槽水流中粗颗粒的运动进行了系统的试验研究。 |
| 8. | The inversion results of the theory model and actual data show that the method can reconstruct near - surface velocity field of complex structure stably , quickly and accurately , thus , can calculate the statics and ensure structural imaging in complex area
理论模型和实际资料的反演结果表明，该方法能稳定、快速、准确地重建复杂地区的近地表速度场，建立准确的近地表速度场，从而可计算准确的静校正量，保证复杂地区的构造成像。 |
| 9. | Then , the development of the tomography is reviewed in brief , while the status in quo of this technique is investigated . and analyzing two key facts in using the method , first , yield data gather ; second , solve near - surface velocity after tomographic inversion
然后回顾了层析成像方法的发展历程，并调查了层析成像方法的研究现状，分析实际应用中存在的两个关键问题，一、野外数据采集；二、用层析成像方法反演求解表层速度，从而确立了本文的研究方向。 |
| 10. | As we know , inverse techniques make blade ' s profile well compatible with its surface velocity distribution , however , they give designers big challenges that the ideal velocity distribution is hard to obtained and sometimes the non - physical solution , such as double covering of flow field or unclosed profiles , would come out . the proposed design procedure in the paper has avoided the disadvantage mentioned above . in this paper , a quasi - irrotational equation is used to describe the flow in cascade instead of the generally used irrotational equation
众所周知，一般的反问题和混合问题的最大特点，是在给定的压力面和吸力面上的压力分布或速度分布条件下，直接得到叶片的几何形状，它可以使叶型型面与表面气流参数有机结起来；其不足之处在于，对设计者而言，很难给定理想的叶片表面压力分布或速度分布，并且有时会得到一个非物理解，如：得出的初始叶型可能会出现前缘、尾缘不封闭的现象。 |
