波的传播

The energy dissipated is given in terms of the specific damping capacity of the structure, which gives a measurement of energy dissipation. A scheme based on the correspondence principle to obtain an estimation of the specific damping capacity was derived. It makes use of an intrinsic equation of the dynamic system, and about the cor...

根据动力系统的固有特征方程与材料弹性特性的关系，研究利用阻尼损耗因子定量描述在高频情况下，波在结构中传播时的能量耗散效应以及结构阻尼损耗因子的表示方法，并通过实验利用波的色散关系估计结构的动力粘弹性模量，理论分析和实验结果表明了这种方法的可行性。

To research the propagation characteristics of travelling wave along transmission line in depth, the authors establish a mathematical model of travelling wave along lossless transmission line with the format of discrete time and space mesh lines, derive the stable condition and boundary condition of the wave equations using numerical solution of partial differential equation, and attempt the simplification of the boundary condition to realize full decoupling of voltage and current.

为深入研究行波在配电线路上的传播特性，建立了时间-空间网格线离散格式的无损传输线行波数学模型，采用偏微分方程的数值解法推导了波动方程的稳定条件和边界条件，并尝试对边界条件进行简化，以实现电压和电流的完全解耦。

In this thesis, terahertz transmission properties through three kinds of simple sub-wavelength metallic structures, including single sub-wavelength metallic circular hole, single sub-wavelength metallic slit and double sub-wavelength metallic slits, are experimentally investigated in the far field by using our own THz time-domain spectroscopy system and are theoretically analyzed. Conclusions are obtained as follows:(1) a single sub-wavelength metallic circular hole exhibits the same terahertz transmission properties as that of round metallic waveguide, which are influenced by the diameter of circular hole and the thickness of metal foil.

本文利用本实验室搭建的太赫兹时域光谱系统研究了太赫兹波段金属亚波长结构的透射特性，其中对三类金属亚波长简单结构即单个金属亚波长圆孔、单个金属亚波长狭缝和金属亚波长双缝的太赫兹透射现象进行了远场探测以及理论上的分析，得到了以下一些成果：(1)太赫兹波通过单个金属亚波长圆孔的传播现象与圆形金属波导具有相同的规律，其特性受到圆孔直径和金属箔厚度的影响。

The origin of travelling wave and its propagation characteristics of modal components in time-domain and frequency domain are analyzed. The characteristics of configuration of railway Automatic Blocking/Power Continuous Lines and principle of various methods of travelling wave fault location are studied. Using transient surges extracted by transform voltage on the lines, a new method of double-ended principle of fault location is proposed.

本文分析了故障暂态行波的产生机理和模分量在时域、频域的传播特性，研究了铁路自闭/贯通线路的结构特点以及目前各种故障测距原理，提出了利用线路侧电压互感器提取暂态行波双端故障测距的新方法，该方法能够精确地测量各种类型的故障距离。

The variaition of the surface current indicates two patterns:from Novermber to next May,it is winter-time pattern,with the left months being the summer-time pattern.The pattern transformation is much slowly from the winter to the summer with～2-3 months;whereas,it is much quick from summer to winter,with only 1 month.These variabilities are mainly caused by the seasonal monsoon.

台湾海峡由南向北传的谐振潮波与由北向南来传播潮波的共同作用，K_1分潮在澎湖列岛西侧海域出现了逆时针旋转的圆流点。2006全年的观测表明，台湾海峡西侧表层流场的的变化主要为冬夏两个阶段，11-5月为冬半年，6-10月为夏半年；由冬向夏的转换较为缓慢，而由夏至冬的转换迅速，主要受制于季风。

But the symmetric axis of TI formation is parallel to the borehole axis in the thesis, the propagation velocity of SV-wave and SH-wave are the same in vertical direction, we can't see the splitting phenomena of shear wave.

本文中地层对称轴和井轴平行，SV波和SH波在竖直方向上的传播速度是相同的，本文地层模型下的井孔中是观测不到横波劈裂现象的。

Later,calculation of vertical velocity and dispersion relation for three-ply type areperformed, as is done for the case when density is stratified continuously. For thelatter, it gives internal wave's propagation form in space.

针对密度分布的三层模式，计算了垂向速度模态与内波的色散关系；连续分层的情况，则给出了半板造波的垂向模态分布与空间传播形态。

A modern analysis method of travelling wave by the wavelet transform is presented with the principle of selecting base wavelet function.

文中讨论了故障产生的行波及其在输电线路上的传播过程，以及影响行波波头识别的主要因素。

Study on the interaction between rarefaction wave and premixed propane-air flame In the research, the co-flow and counter-flow rarefaction wave were induced to intervene in the flame by different ignition scheme.

另外，管道中压力波的作用是Tulip火焰结构形成的重要原因。(2)研究了稀疏波对丙烷-空气预混火焰传播特性的影响。

In simulation, we use the software called "BeamPROP 5.1" by "RSoft Design Group" to study the wave propagation in the tapered fiber and calculate the monitored power, mode profile, contour map…etc.

在模拟实验上，我们利用R-Soft公司出版的BeamPROP 5.1这套软体进行模拟。我们观察到波在拉伸光纤中的传播特性，并且讨论波经过拉伸光纤后的功率、电场分布型态、电场的等高线图…等。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。