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1 SIMPLE WAVE NATURE OF SOUND 2.1.1 Introduction to Longitudinal Propagation Wave motion or vibration is made possible by inertia and elasticity in a material.

2.1声音的简单波本质2.1.1纵向传播介绍波动或者说震动，是可以通过物体的惯性和弹力产生的。

The wave propagation phenomena of the longitudinal wave in the bars,the flexural and shear waves in the beams were also analysed.

分析了杆中的纵波、Timoshenko梁中弯曲波及剪切波的传播现象。

It further demonstrates that applying the two-dimensional shallow water equation with the present high-resolution scheme can effectively simulate the propagation of dam-break bores, which may provide a scientific approach for the lucubration of other dam-break flow characteristics and the decision-making of the prevention of disasters.

应用二维浅水方程和本文的高分辨率数值方法能有效地模拟溃坝波的演进过程。

Simultaneously, it also shows the frequency domain criteria are suitable for chaotic complete synchronization of the master-slave Lur'e systems concerning master's control signals without propagation delay.

从所得到的三个频率域判据我们发现，只要满足这些判据，主—从Lur'e系统混沌滞后同步时的滞后时间取决并等于主系统控制信号的传输延迟时间。

Both Luxemburg's thinking on associating policy and Lenin's on part organ are important parts of Marxism-journalism and propagation ideas, and are thus studied and used for reference.

卢森堡的交流政策思想与列宁的党报思想一样，是马克思主义新闻和宣传思想的重要组成部分，应该对它进行研究和借鉴。

Objective: To study the propagation and phenotypes changes of killer cell CD3AK cell activated by CD3 mAb in vitro.

目的：研究肺癌清扫淋巴结的淋巴细胞，经CD3单克隆抗体激活后的杀伤细胞(CD3AK细胞)在体外的增殖和表型变化。

This paper describes how to use Flash production of viscous flow in vivo experiments indicate friction, rotation speed Dengjiao containers of liquids in relative balance, the system and control of, weak disturbance in the transmission space - Mach cone, the disturbance wave propagation process, bypassing the wings The two-dimensional flows, ease converter and blast crisis and stagnation flow indicate parameters and a number of critical parameters, such as animation.

本文介绍了如何运用Flash制作粘性流体内摩擦实验示意、等角速旋转容器中液体的相对平衡、系统与控制体、微弱扰动在空间的传播——马赫锥、扰动波传播过程、绕过机翼的二维流动、缓变流与急变流示意以及滞止参数和临界参数等若干动画。

This paper describes how to use Flash production of viscous flow in vivo experiments indicate friction, rotation speed Dengjiao containers of liquids in relative balance, the system and control of, weak disturbance in the transmission space - Mach cone, the disturbance wave propagation process, bypassing the wings The two-dimensional flows, ease converter and blast crisis and stagnation flow indicate parameters and critical parameters such as the concept that a number of animation, produced by sports meeting between the animation, shape meeting between animation, masking effects animation and timeline to achieve these fluid flow The animation, and by adding these buttons used to control the flow of fluid animation speed.

本文介绍了如何运用Flash制作粘性流体内摩擦实验示意、等角速旋转容器中液体的相对平衡、系统与控制体、微弱扰动在空间的传播——马赫锥、扰动波传播过程、绕过机翼的二维流动、缓变流与急变流示意以及滞止参数和临界参数的概念说明等若干动画，通过制作运动补间动画、形状补间动画、遮罩动画和时间轴特效来实现这些流体流动的动画效果，并通过添加按钮用于控制这些流体流动的动画的速度。

In this paper, using the data of 52 ionosonde stations distributed in the world, the developments of the ionospheric disturbance during the magnetic storm on July 8, 1958 and the propagation direction and velocity of this disturbance are inrestegated.

本文用遍布全球的52个电离层垂测台站资料，研究1958年7月8日磁暴期间全球电离层扰动的发展变化；各扇区的响应特性；扰动的传播轨迹及速度等。获得以下结果：1。

An all - pervading,infinitely elastic,massless medium formerly postulated as the medium of propagation of electromagnetic waves.

大体上达到人均四千美元，做到这一步，中国就达到中等发达的水平。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。