查询词典 wave velocity

The clearance cause more serious effect on the response of turret than that of the rotary table. This result agrees with the experimental response of roller gear indexing cam mechanism. In addition, some problems, such as the impacts on mechanism with clearance, effect on response for preload, effect for inertia of rotary table and stiffness of output-shaft, effect on wave of velocity and torsion for motor characteristic, and so on are investigated.

通过对扭转动力学模型的计算还对以下问题进行了研究：间隙造成的横越冲击的表现；预紧的存在对响应的影响；间隙的存在对有廓形误差的凸轮机构的动力学响应的影响；分度盘轴的刚度和载荷盘惯量对含间隙分度凸轮机构响应的影响；电机特性对转速波动和扭矩波动的影响等等。

It is disadvantageous to stability of lunar rover.The frequency of wheel wave is a function of velocity of wheel motor, dimension of wheel,density of grousers and wheel slide.

车轮在垂直地面上的周期波动和前进速度的波动对于月球车来说是一个周期性的激励，其频率应与月球车系统的固有频率避开，防止月球车前进时产尘较大的振动。

The more difference of the impedance ratio or velocity ratio, the better wave isolation is.

对於土壤与填充槽沟材质间之相关影响参数来说，土壤与填充槽沟材质间之阻抗比差异越大，对於震波阻隔效果越佳。

A circle is placed at the launch point to improve the interaction between the electron beam and the fields supported by the slow wave structure, thus to control the beam current density at the launch point, and to minimize the loss of the electron beam energy. The inaner radii of the extractor vanes are slightly larger than those of other SWS vanes, which increases the axial group velocity and enhances the microwave output power and efficiency. Implementation of two RF choke vanes stops the leakage of microwave pulse power toward the diode, and makes the device more compact than the conventional MILO.

该振荡器在阴极电子发射起点加圆环，控制此处电子束的发射密度，来减少电子能量的损耗，改善束－波互作用；逐渐加大慢波结构的后两个叶片的内半径，增大微波群速度，便于谐振腔中的能量输出，提高微波输出效率；采用两个扼流片有效地阻止了微波功率向二极管区泄漏，相应减小了器件的尺寸。

The results show when formations contains a single vertical parallel fracture system, the amplitude of reflected P-wave is more sensitive than velocity for different infillings of vertical fractures; the anisotropy increases as fracture density increasing; the anisotropy of gas-bearing fracture is stronger than the fracture saturated with fluid.

研究结果表明，当地层中含有单组垂直的平行裂隙时，反射P波振幅对垂直裂隙中充填物的敏感性大于速度对裂隙中充填物的敏感性，随着裂隙密度的增加，P波各向异性程度也相应增强，裂隙中含气时，各向异性程度较含饱和水时强。

The prestack migration into space should be based on accurate isochrones through the heterogeneous velocity model and the wave incidence angles.

空间迭前偏移是基于精确的通过不均匀速度模型的等时线和波的入射角。

In this lecture, the study content of nonlinear atom optics and their experimental results and recent progress are introduced in some detail, which includes atomic solitons, four-wave mixing, slow light group-velocity and superluminal light, superfluid and vortex, Josephson effect and phase-coherent amplification of atomic matter waves, and so on

文章重点介绍了非线性原子光学的研究内容、实验结果及其最新进展，主要包括原子孤子、原子物质波中的四波混频、光速减慢与负群速现象、超流及涡流、Josephson效应和物质波的相位相干放大等。

Wave equation migration velocity analysis is a linearized inverse problem.

波动方程偏移速度分析是一种线性反演方法，它要求对Born近似的展开序列作一阶截断。

Wideangle parabolic approximations to wave equation usually lead to nonconstant differential migrators with their coefficients varying with lateral velocity variations, and hence require a finitedifference numerical implementation.

波动方程宽角抛物逼近得到的通常是非常系数的单程波传播算子，其系数是速度横向变化的函数，因此需要利用有限差分进行数值实施。

Because of the ray asymmetry of the downgoing and upgoing waves, the velocity analysis based on the CMP gather cannot be adapted to that of the converted wave.

转换波上、下行波的不对称性，使得常规基于共中心点道集的速度分析不能适用于转换波。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。