查询词典 wave propagation

Xi ′ an Jiaotong University, Xi ′ an 710049, ChinaAbstract : Propagation of generalized Rayleigh wave in a layered piezoelectric structure with initial stress is investigated. It involves a thin elastic layer bonded perfectly to a piezoelectric elastic substrate.

摘 要：通过求解考虑初应力时的耦合波动方程，研究了覆盖层为各向同性材料、基底为横观各向同性压电材料的压电层状结构中广义Rayleigh波传播时初应力和相速度的关系。

He Maxwell equations for the propagation of electromagnetic waves in photonic crystal fibers are solved with plane wave method.

用平面波展开法对光子晶体光纤中电磁场的Maxwell方程组进行了求解。

The object of present paper is to investigate the propagation of magneto-viscoelas-tic plane wave in initially stressed conducting media.

本文研究初始应力及磁场作用下导电粘弹体内的波动特性。

Some of the specific effects of space weather on Earth systems include interference with short wave radio propagation, problems with electric power grids, the decay of satellite orbits, and radiation hazard for satellites and for astronauts during some phases of space missions.

太空天气对地球系统所产生的影响包括对短波无线电传播的干涉，电力输送线路的问题，卫星运行寿命的减少，以及对太空任务某些时段的卫星与太空人造成的辐射危险。

The results show that the rarefaction wave influences the premixed flame structure and propagation greatly.

实验过程中，通过不同的点火方案诱导出不同传播方向的稀疏波与火焰发生干涉作用。

Since the governing equations for atmosphere movement can be reduced to a convective equation, so, to verify the validity of SFEBS, the propagation of one dimensional wave packet and shock governed by convective equation are simulated and compared with the boundary scheme that is based on the idea of Taylor series expansion.

因为大气运动的控制方程简化后可以归结为一个对流方程，所以作为边界格式之间的比较和检验，在一维情况下用对流方程和数值模拟中具有代表性的波包和激波作为算例，将其与传统的基于Taylor展开思想构造的边界条件进行了比较。

Therefore, to study the propagation and scattering of THz wave in biological media is very important for the development of society, science and technology.

因此，展开对THz光波在介质中的传播和散射问题的研究对当前的社会进步和科学技术的发展都有着非常重要的现实意义。

Inevitably, some technically difficult problem must be solved, including the variety of speed about tropospheric propagation, the sky wave disturbance and the near-far problem.

但是，不可避免的遇到几个技术难题，包括无线电传播速度变化的影响，天波干扰问题，以及远近效应问题。

The experiments and simulations are performed by using a conical lens whose radius is 15 mm and basic angle is 1°. The experimental results are compared with the theoretical analysis and computer simulation results. The comparison indicates that the influence of eccentricity on the diffraction mode decreases as the radius of curvature of incidental spherical wave and the propagation distance decrease.

使用半径为15mm，底角为1°的圆锥透镜进行计算机仿真和实验，最后将实验结果与理论分析和仿真结果相比较，证明球面波的曲率半径和出射光束的传输距离越小，偏轴对衍射模式的影响越小。

The ground response to underground explosion is transformed into the problem about propagation and reflection of spherical dilatation wave in elastic half-space.

将地下爆炸的地表响应转化为弹性半空间内球面膨胀波的传播和反射问题。

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％。