波的传播

Due to the symmetry of the plate, there are symmetric and antisymmetric mode vibrations with respect to the median plane of the plate.

首先建立了在偏压电场作用下压电介质的运动微分方程，进而根据对称模态和反对称模态的特点，分别在自由表面电学开路和电学短路情况下得到了Lamb波传播的相速度方程。

"The 犇 ox download that from 360 safety central near future intercepts and capture implement, the malign trojan virus such as army group of sweeping wave worm, locust can discover, of trojan industry catenary run had bright commercial feature and capacity of large area transmission, mr Cai net is silver-colored by pilfer it is a case only,' cryptotaeneous cinquefoil catchs chicken implement ' union ' grey dove ' etc far accuse a trojan to download an address to be in fastigium can let on 10 thousand computer reduce inside a day ' fryer '."

"从360安全中心近期截获的犇牛下载器、扫荡波蠕虫、蝗虫军团等恶性木马病毒可以发现，木马产业链的运作具备了鲜明的商业特征和大面积传播能力，蔡先生网银被盗仅是个案，一个'狼牙抓鸡器'结合'灰鸽子'等远控木马下载地址在高峰期一天内可以让上万台电脑沦为'肉鸡'。"

By using the meshless method, a numerical ocean engineering basin was established to simulate irregular waves propagated in shallow water. Locating the source points outside the computational domain, the problem of water wave propagation was solved by collocation of only a few boundary points instead of meshes.

采用基于配点和径向基函数的无网格数值模拟方法，建立数值海洋工程水池，将源点布置在模拟波浪场之外，沿边界布置配点而不是划分网格；对深水不规则波经斜坡过渡后在均匀水深浅水域中传播的过程进行无网格数值模拟和波谱的迭代修正。

First, wave amplitudes are obtained based on the equilibrium and continuity condition of the junction.

研究表明通过合理的选择激励梁、耦合梁和耦合点阻抗之间的匹配关系，可有效控制耦合点的纵向波传播。

Detail are introduced as following: transfering the LS equation to difference equation, setting the initial conditions for different shape explosive at different initiation way (point, line, plane, divergent or convergent); the dealing method of different edge conditions; how to draw the curve graph in two dimensional space or surface graph in three dimensional space with the calculated data.

本文提出了在三维直角坐标系中爆轰波传播LS方程离散化方法，建立了相应的差分方程，研究了对不同形状炸药在多种起爆形式（点、线、面、散心、聚心）下初值条件的设定，以及各种边界条件的处理方法。

It is obvious that the doninat feature might be the existence of two quasi-permanent atmospheric active centers (the Alutian Low and the Tropical Pacific High) over this area.

并指出该地区的空间波是一行波，其传播方向是自西北向东南的准纬向方向，且高低纬度地区气压距平变化是反位相关系。

Meanwhile, improved suppression approach to nonstationary interference from multipath propagation is proposed by forming adaptive STAP in fast-time domain and maintaining slow-time statistical properties of the first order sea clutter output approximately unperturbed by filter fluctuation.

同时，针对多径传播产生的非平稳干扰，在保持海杂波主成分统计特性不变条件下，通过构造空域与快时间域的二维滤波器对非平稳干扰进行抑制。

Near the mesopause, propagating in the background wind which increasing with heights, the inertial gravity waves will reach their critical layers.

在中层顶附近，在随高度增加的背景风中传播的惯性重力波会遇到临界层。

Because of the good characteristics of long range propagation and high sensitivity to damage, elastic guided wave is being a hot spot in the structure health monitoring community.

弹性导波由于其对损伤的敏感性和长距离传播特性，成为近年来结构健康监测领域的一个研究热点。

So the researches on the characteristics of tropospheric ducts environment, propagation and its applications have great theoretical significance and its applications have great theoretical significance and are of great value to military.

因此开展大气波导环境中电波传播特性及其应用的探究具有重大的理论意义和军事价值。

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％。