波的传播

From 1920s up to Now, various techniques and methods for wave field decomposition, propagation and migration/imaging have been well developed, such as the Kirchhoff asymptotic method, frequency-wavenumber domain phase-shift and phase-shift-plus-interpolation methods, and the one-way wave equation based phase-screen and generalized screen methods, etc.

自上个世纪二十年代至今，波场分解、传播与偏移成像技术经历了将近一个世纪的发展，形成了多种不同的方法，如Kirchhoff波动方程高频近似解方法，频率-波数域的相移(phase-shift)方法和相移-内插方法，以及在混合域中基于单向波动方程的相位屏、广义屏方法等。

The method is used to model full-wave field in anisotropic layered medium with a blg fracture.

采用本文方法对一含较大裂缝的各向异性分层地质模型进行全波场模拟，计算所得地震剖面可以明显地反映裂缝对波传播的影响，说明该方法完全适用于各向异性介质的地震波勘探。

The initiation points locate on the tube wall, the parabolic reflector and near the second ignition point, separately.

不同的点火和起爆过程导致了不同的流场波系结构，同时影响了爆轰波传播的波动力学过程。

It also covers two-fluid hydrodynamic plasma models, wave propagation in a magnetic field, kinetic theory, Vlasov plasma model, electron plasma waves and Landau damping, ion-acoustic waves, and streaming instabilities.

它也涵盖双流体的流体动力学的等离子体模型、磁场内的波传播现象、动力理论、Vlasov等离子体模型、等离子体波、蓝道阻尼、离子声波和串流不稳定性。

This type of wave is called longitudinal.

波传播的方向与振动的方向是相同的，这类波叫做纵波。

In isotropic medium the wave velocity of these two types of wave is identical; however, their vibration characteristics are different.

实验测试表明无偏振特性的扭转波在各向异性介质中传播时也会出现两种速度不同的扭转波，速度值与剪切横波的快慢横波速度值一致。

And establish some effective discriminating indicators so as to advance the research ulteriorly and make it a more perfect research field in the marine sedimentology.

内波在海洋内部普遍发育，在所有的大洋中均有内波存在，但是它的振幅、周期、传播速度及其存在深度的变化范围很大[2]。

In our views, the region of the CMI, near the ionosphere of Saturn (1 Saturn radius above the polar area), is regarded as the same area as the Saturn's Kilometric Radiation Source.In this paper, we deduce that the KHI will appear before 11 LT (Saturn's Local Time), the Alfven wave will take 383 min to reach Saturn, the sunward magnetic line will bend almost 80°. Finally, we get the distribution of SKR source. It locates from 7～9 LT at a relatively lower latitude to 18 LT at the eveningside.

本文求出了磁层顶附近开尔文-亥姆霍兹不稳定性发生在土星本地时（Saturn's Local Time）11 LT以前，得出了阿尔芬波沿磁力线传播到土星需要约383 min，求解出向阳面磁力线弯曲了约80°，最后得出土星千米波辐射源分布从黎明段的7～9 LT延伸到傍晚段的18 LT，并且黎明段分布的纬度比傍晚段低。

In our views, the region of the CMI, near the ionosphere of Saturn (1 Saturn radius above the polar area), is regarded as the same area as the Saturn's Kilometric Radiation Source. In this paper, we deduce that the Kill will appear before 11 LT (Saturn's Local Time), the Alfven wave will take 38.3min to reach Saturn, the sunward magnetic line will bend almost 80°. Finally, we get the distribution of SKR source. It locates from 7~9 LT at a relatively lower latitude to 18 LT at the eveningside.

本文求出了磁层顶附近开尔文－亥姆霍兹不稳定性发生在土星本地时(Satrun's Local Time)11LT以前，得出了阿尔芬波沿磁力线传播到土星需要约38.3min，求解出向阳面磁力线弯曲了约80°，最后得出土星千米波辐射源分布从黎明段的7~9LT延伸到傍晚段的18LT，并且黎明段分布的纬度比傍晚段低。

After analyzing the great amount data, this paper concludes new arithmetic of better repletion and exactness for the several parameters based on the home and aboard arithmetic study.

论文的主要贡献在于：扩展了示波法的运用范围，与弹性腔模型和心血管流体力学相结合，分析出计算心血管动脉硬化各参数的算法，如脉压、臂动脉顺应性(C2 )、动脉硬化指数、脉搏波传播速度。

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。