英语释义

1. the velocity with which some definite peculiarity of a composite wave train (as an interference maximum) advances through a medium — compare phase velocity

片语

anomalous group-velocity异常群速度

group settling velocity群体沉速

normal group-velocity正常群速度

group p velocity群速度

group-velocity reduction群速变慢

group dispersion velocity群速度色散

group sinking velocity群体沉速

group-velocity index群速度指数

controllable group-velocity群速可控

英汉例句

• The results show that the evolution of the steady-state output parameters of the system varies with the values of modulation parameters, group velocity dispersion and self phase modulation.

  研究表明，系统的定态输出随系统的调制深度或调制频率、群速色散或自相位调制等参量值的变化而变化。

• In recent years, researches about the controllable group velocity of light propagation had made many progresses.

  最近几年中，慢光和超光速的研究取得了很多进展。

• Taking into account of the distribution of the field and group velocity mismatch we also give the optimized size of the new detector.

  连系起来。根据辐射场在晶体中分布与超快脉沖群速度失配，还给出了探测器制作的尺寸要求。

• Then the possibility of larger phase velocity and group velocity than light speed in dispersive medium is discussed.

  然后从色散介质中相速度与群速度的关系，讨论了相速度和群速度超光速的可能性。

• The article discusses the differences in physical mechanism of mode locking by laser pulse injection between the dispersion region at positive group velocity and that at negative group velocity.

  本文阐述工作于正、负群速色散区中的光脉沖注入锁模的物理机制的区别。

• Thus the negative group velocity is simply an apparent velocity as we shall show from the study of energy flow.

  因此，负群速度只是表观速度，能流的研究结果也证明了这一点。

• Based on the theory of elastodynamics, the longitudinal guided wave and flexural guided wave group velocity dispersion curves for M22 stud were calculated.

  根据弹性动力学理论，采用纵向导波与弯曲导波相结合的方法对螺柱所受轴向应力进行无损检测。

• The reflection spectrum, time delay, and group velocity dispersion (GVD) of the gratings are analyzed.

  并对此种光栅的反射谱，时延及群速度色散进行了理论分析；

• The paper studies the concepts of phase velocity and group velocity on electromagnetic wave propagation and discusses the relation between signal conveyance and energy conveyance.

  文章研究了电磁波传播的群速与相速概念，论证了信号传送与能量传递的必然联系。

• The results showed that the effect of group velocity dispersion(GVD) on the pulse with large chip was slight and the effect of spectral width on the self-focusing properties could be ignored.

  研究结果表明，群速度色散（GVD）对大啁啾脉沖的影响很小，谱宽对自聚集的影响可以忽略。

• This paper reveals that the group velocity of a weak laser probe field can be manipulated by controlling the intensity of the driving field applied to a near-degenerate closed three-level V system.

  在近简并的封闭三能级V系统中，一束弱激光探测场的群速度可以通过控制一单色驱动场的强度实现慢光速到超光速的转换。

• Without considering curvature effect, we study the contribution of the electronic heat capacity, group velocity and density of states of(6,0)Single-walled carbon nanotubes.

  在忽略卷曲效应的情形下，计算（6，0）管的电子能量、群速及能态密度三个参量，然后利用这些参量推算重要热学量电子比热客．结果表明；

• In all the above cases, the utility for transport of terahertz pulses is limited by the high loss, or by the group velocity dispersion of the guided waves.

  在上所述的情况中，太赫兹脉沖的有效传输受限于高损耗，或导波的群速度色散。

• After finding the orthogonal sets corresponding to the guided-wave restriction condition, the analytic dispersive equation, group velocity equation and steady response are obtained simultaneously.

  提出自结合方法，导出波传播的限定条件，在找到相应的正交序列后，完全得到弹性波导系统中解析形式的频散方程、群速度方程和稳态响应。

• Theoretical deduction says that in a borehole penetrating elastic formations, pseudo Rayleigh wave does not take shear-wave velocity, but its group velocity may be very close to shear-wave velocity.

  推演说明在弹性地层的井眼中，伪瑞利波不可能以横波速度传播，但其群速度与横波速度可以非常接近。

• Until now, there is no practical optical buffer. In our case, we try to realize data storage or packet synchronization by slowing down the group velocity of light.

  目前还没有可实用的光缓存，我们旨在通过减慢光速来实现信号的存储或者同步。

• The effects of group velocity dispersion, polarization mode dispersion and nonlinearity in fiber on the performance of wavelength division multiplexing system are analyzed in detail.

  论述了光纤群速度色散、偏振模色散及光纤中各种非线性效应对光波分复用系统性能的影响，并给出了为减小其影响而应采取的措施。

• The correlation property between the distribution of attenuation factor and that of the group velocity is indicated, in this study.

  研究结果显示，在频率域内，面波衰减系数分布与群速度分布具有一定的相关性。

• The properties of nonlinear crystal BBO is presented. The walk-off Angle and the spatial walk-off effect, the group velocity mismatch and the temporal walk-off effect are discussed.

  对BBO晶体的材料特性，有效非线性系数，以及BBO晶体的走离角与空间走离效应，群速度失配与时间走离效应进行了讨论。

• The group velocity dispersion properties of photonic crystal fiber (PCF) were investigated in detail by equivalent index model.

  应用等效折射率模型对折射率导模光子晶体光纤的群速度色散特性进行了详细的讨论。

• The group velocity dispersion curves of Bayleigh waves through most of the Qing-hai-Xizang Plateau are obtained, using the single-station and multiple-filtering process.

  本文用单台多重滤波方法测定了经过青藏高原地区瑞利波群速度频散曲线。

• In this paper, the heat transport characteristics such as the phonon spectrum, the group velocity and the thermal conductivity of the semiconductor superlattice thermoelectric materials were studied.

  本文研究了半导体超晶格热电材料的声子谱、群速度和热导率等热输运问题，重点通过对声学声子群速度特性的研究来理解超晶格材料的导热性质。

• The result shows that the edged sampling mirror and the edged vacuum window can be treated as a pair of prisms, which generates negative group velocity dispersion.

  分析结果表明，带楔角的取样反射镜与后续光路中使用楔形真空窗口构成了一对棱镜，产生负的群速度色散。

• To validate the theoretical analysis, a test system for group velocity delay was set up based on RF modulation.

  为了验证理论分析，设计了射频调制法测试介质膜滤波器群速度延时的实验装置。