查询词典 P wave

The P-wave velocity-depth profile and electrical conductivity-depth profile can be calculated from the experimental data and the fundamental geothermal parameters in northern margin of the North China craton. The comparison of the calculated results with the elastic and electrical structure of this area reveals that the v of amphibolite is approximately equal to the middle crust, the electrical conductivity of amphibolite intersects the range of the middle and lower crust in this area.

利用实验获得的弹性波纵波速度及其温度系数和压力系数以及电导率与温度的关系，结合现今华北克拉通地热学的基本参数，计算得到斜长角闪岩的弹性波纵波速度－深度剖面和电导率-深度剖面，将二者分别与华北克拉通北缘深部地壳的弹性及电性结构进行对比的结果表明：高温高压下绿泥石化斜长角闪岩的弹性波纵波速度与该地区中地壳速度相当，电导率介于中、下地壳范围内。

P-wave AVO inversion is a complicated constrained nonlinear optimization problem, which is better achieved using global optimization methods.

AVO反演是一个非线性优化问题，因此采用非线性的反演方法，其解空间的性质、状态应优于线性反演方法。

We can see the P wave amplitude and traveltime difference with the azimuth and incidence angle in numerical simulation.

在数值模拟中可以看到随观测方位和入射角变化的纵波振幅和旅行时的差异。

The gas content and permeability of coal can be researched by the technology of P-wave AVO and azimuthal AVO which based on the anisotropy theory.

煤层的含气性及渗透性可以利用纵波AVO技术及基于各向异性理论的方位AVO技术进行研究。

On the basis of the frequency domain Born approximation theory of the scattering of two dimentional elastic waves, the time domain Born approximate solution to the scattering of elastic wave s with arbitrary frequencies is derived.

在二维弹性波散射频域Bron近似解的基础上，通过Fourier变换，推导了任意频率平面P波组合的脉冲波入射二维散射系统时，散射场的时域Born近似解。

Blast wave ; transfer function method ; transient response ; inversion of Laplace transformation ; Crump method ; epsilon algorithm

冲击波；传递函数法；瞬态响应； Laplace逆变换； Crum p法；ε算法

A tripartite array of infrasonic measurement in Changping county of Beijing was arranged using three CSH-1 infrasonic receivers. The infrasonic signals (P-t curve and wave vector) produced by meteor shower from Leo on November 17 in 1998 were observed.

采用三台CSH-1型次声接收器，在北京昌平县布置了一个次声测量三点阵，观测到1998年11月17日狮子座流星雨产生的次声波P-t曲线和波速波向图。

The method we have proposed can be widely applied for sands and sandstones. It also provides intrinsic constrain to both P- and S-wave velocity data.

我们提出的方法可以广泛被应用于砂体和砂岩中，也能提供P波和S波速度数据的本质约束。

The P wave duration and P 2R interval were increased while pacing at right atrial appendage 1 The activation time from pacing site to His bundle and coronary sinus was the longest in pacing at right atrial appendage , while the activation time in pacing at Koch triangle , Koch triangle with high right atrium and biatria was significantly shorter especially pacing at Koch triangle and Koch triangle with high right atrium1 There were no significant differences in right atrium pressure among all pacings1 Conclusion It is suggested that Koch triangle pacing could probably replace high right atrial with coronary sinus pacing and biatrial pacing 1

从心房激动顺序分析，右心耳起搏时，激动传至希氏束区及冠状窦区的时间最长，而 Koch三角、Koch三角+高位右房及双房起搏时则较短，尤其是 Koch三角、Koch三角+高位右房起搏缩短更明显。另外，不同部位、不同方式起搏时右心房压力无差异。结论 Koch三角起搏在某种程度上可替代高位右房+冠状窦起搏及双房起搏。

Presence of multiples leads to poor quality in main stages of offshore seismic data processing, such as velocity analysis, stacking and imaging. Three basic multiple attenuating methods are reviewed; and a more effective multiple attenuator is achieved by joining them. As the first step, shot or receiver records are extrapolated by wave-equation datum algorithms. The extrapolation will establish a model of waterbottom multiples. Waterbotton multiples will then be removed by subtracting the extrapolated records from the original records. After that, predictive deconvolution is used to attenuate the multiples created by source ghost. Finaly, RADON transformation is adopted to separate peg-leg multiples and residual water-bottom multiples from the original data in the τ-p domain.

地震勘探尤其是海上地震勘探中存在着各类多次波，由于多次波的存在严重影响了速度分析、叠加、偏移成像等地震资料处理，海上多次波主要有全程多次波和层间多次两大类，为了压制海上不同类型的多次波，本文首先分析波场外推、预测反褶积和拉东变换衰减不同多次波的理论基础，然后联合采用这些方法，分别衰减全程多次波和层间多次波；即：首先对炮记录或者接收点记录进行波场外推，建立海底多次波模型，预测并减去全程多次波，然后利用预测反褶积衰减掉周期性明显的多次波，最后将数据转换到τ-p 域，用拉冬变换根据同一时间多次波和有效波在速度等方面的差异，进一步分离层间多次波和剩余的全程多次波，并在该域中切除分离出的多次波，从而实现联合多次波衰减处理。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。