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In this paper, we research the imaging problems beneath volcanic area. We sort common asymptotic conversion point gathers and perform velocity analysis to establish the initial velocity which will be used in PSTM. By scanning migration velocity and V p/ V s, we get the optimum migration velocity and

本文针对火山岩地震屏蔽层的转换波成像问题，通过对转换波共近似转换点道集进行速度分析，建立了转换波叠前时间偏移的初始速度场，通过速度扫描和纵、横波速度比值扫描确定最佳的偏移速度场和纵、横波速度比值，实现了在火山岩高速层覆盖区域的转换波偏移成像。

The forces and moment for the model advancing forward with forced heave and forced pitch oscillation, and the hydrodynamic mass and damping coefficients for heave and pitch motion of the model are given. The results of numerical simulation are compared with the experimental data from Delft University of Technology, and show good agreement with them.

文中给出了以不同航速前进的船舶强制垂荡和纵摇的力与力矩，以及船舶垂荡和纵摇的附加质量系数和阻尼系数，并与DUT的试验数据进行了比较，二者吻合良好。

By measuring the velocities of the P-wave and S-wave in three orthotropic directions including parallel and vertical directions to the stratum of the rock samples for slate, phyllite, mylonite and metasandstone, and based on the wave velocities of other rocks from the relevant studies, the anisotropic effect of wave velocity ratio of the P-wave and S-wave for most rocks is put forward.

通过对板岩、千枚岩、糜棱岩和变质砂岩等4种各向异性岩石在平行和垂直层理或板理的3个正交方向上进行大量的纵、横波波速试验，并结合对相关文献中己有岩石波速数据的深入分析，提出岩石介质纵、横波波速比的各向异性效应。这种效应广泛存在，其发育程度受到岩石类别的控制。

Methods: Injured patients of cervical spine was cayyied on X-ray inspection.,then according to the result of ADI and LADS ,next to CT or MRI inspection ,and that was to guide clinical diagonosis and treatment.To observe atlanto-dental interval (anterior arch of atlas posterior border to odontoid process anterior border) and odontoid process caster(included angle between axis of ordinate of odontoid process and axis of ordinate of odontoid vertebra) on the X-ray lateral projection.

对有颈部外伤史的病人常规行X线检查，然后根据寰齿间距和齿突侧块间隙的结果，行下一步CT检查或者MRI检查，指导临床治疗方法的选择。X线侧位片观察寰齿前间隙(为寰椎前弓后缘与齿突前缘距离)，齿状突后倾角(齿突纵轴与枢椎体纵轴的夹角)；开口正位片上测定齿突侧块间隙。

After studying the effect of spirality that yarn twist and twist direction caused, we can conclude that the spirality of polyester/cotton blend fabrics will enlarge while the blended percentage of polyester becomes higher.

在研究纱线捻度、捻向及其他参数对织物纵行歪斜的影响程度时，得出了涤棉纱的纵行歪斜程度随纱线中涤纶混纺比的提高而增大的结论。

The cross section of the mesothoracic dorsal longitudinal muscle in macropterous adult was 29 times of that in brachypterous adult, while the cross section of the mesothoracic dorsal longitudinal muscle in the brachypterous was only doublled from the critical period to audlt.

长翅型成虫背纵肌的横切面面积大约是短翅型的29倍，而短翅型成虫的背纵肌横切面积仅为4龄第16小时时若虫的2倍左右。

A single - masted,fore - and - aft - rigged sailing vessel with two or more headsails and a mast set somewhat farther aft than that of a sloop.

独桅纵帆船一种单桅杆的，有纵帆装置的帆船，具有两个或多个船首斜帆，其单桅杆的位置比单桅帆船的要稍微靠后一点

Simulation of heaving and pitching motion of fast boat with hydrofoils;2. High-efficient flap type rudders with 45°dip angle are installed in order to control the course, rolling and pitching simultaneously.

采用45°倾斜安装的高效襟翼舵实现航向、横摇、纵摇的同时控制，阐述了斜舵减摇原理，并提出了采用高效襟翼舵以获得较高的升力系数，从而在不加大舵面积的情况下实现船舶纵摇运动控制。

In terms of luminance performance of BLUs, there shows no much difference between V-cut and U-cut microstructures from simulation results. However, U-cut microstructure outperforms V-cut one in luminance uniformity.

另外在整体BLU辉度并未因入光侧添加微结构而有大幅的变化及差异的前提下，U-cut纵沟微结构的使用效果会比V-cut纵沟微结构来的好，除了在入光测量测点均齐度提升略胜一筹外，其入光侧明暗不均问题亦可处理地更为淡化，以达到光学及品味之最佳化。

The parametrically excited and forcedly-parametrically excited equations of ship rolling in longitudinal and oblique seas are established.

主要研究内容和结论如下：考虑波面形状引起的船舶初稳性高的变化，假设升沉和纵摇满足准静力平衡，提出了纵浪和斜浪中初稳性高波动项的计算方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。