波动方程

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。

Based on plane wave decomposition, We propose a wave-equation depth migration method for pre-stack seismic data.

提出了一套基於平面波分解的波动方程叠前地震数据深度偏移方法。

First, response model in time domain of pile under the transient state of stimulated vibration is reduced according to damping wave equation, initial condition and boundary condition.

首先，从桩-土系统共同作用的阻尼波动方程入手，结合初始条件、边界条件，推导了完整桩瞬态激振下的时域响应模型。

On the other hand,the reproducing kernel space of the wave equation is investigated in this thesis.

另一方面，本文又应用再生核空间理论的特殊技巧，讨论了波动方程解空间的问题。

Firstly, the reproducing kernel of the solution space of the second-order wave equation is gotten.

首先，针对二阶波动方程的解，构造再生核。

Using the wave equation prestack depth migration on SEGEAGE 2_D salt dome model as an example, the twoorder generalized screen propagator increases 30% calculation work relative to the conventional generalized screen propagator.

以SEGEAGE二维盐丘模型数据的波动方程叠前深度偏移为例，二阶广义屏传播算子相对于常规广义屏传播算子增加了30%的计算量。

For simplicity, only the symplectic method based on scalar wave equation is given in this paper.

有限差分方法早在 2 0多年前就被用于计算均匀介质中的弹性波动方程。

The system is quantized in the usual way and the result is the Schrodinger wave equation for the atom.

该系统的量化通常的方式和结果是薛定谔波动方程的原子。

Research on development methods and application of CAD system of prac tical sheet metal expansion ;2. A frame expansion method of operator is used to the phase shift operator of split-step Fourier propagator.

针对裂步Fourier传播算子在速度强横向变化介质中的不足，将算子的框架展开方法应用于Fourier传播算子中的相移算子，提出了一种波场传播的局部裂步Fourier传播算子，并把它应用于波动方程叠前深度偏移成像。

Wave equation ; spectral element method ; time integral method ; aeroacoustics

波动方程；谱元方法；时间积分方法；气动声学

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。