压缩波在减速流中变陡。
波阻抗较大的材料，有利于压缩波的透射。
The biggish wave impedance was better for the compress wave transmission.
所发出的前向快压缩波经非线性变陡形成快激波。
Meanwhile the forward fast compression waves become a fast shock through nonlinear steepening process.
另外两种，P或者“压缩波”以及S“剧烈波”，穿透地球内部。
The other two, Primary (P) or compression waves and Secondary (S) or shear waves, penetrate the interior of the Earth.
超音速压缩波的初态参数出现间断，但其终态参数却是连续变化的。
The initial and final parameters of subsonic compaction wave alter continuously. The initial parameters of ultrasonic compaction wave are discontinuous, but its final parameters alter smoothly.
爬波是一种在材料的表面下传播的压缩波，对表面和近表面缺陷非常敏感。
Creeping wave is a type of compressional wave, which propagates below the surface and is sensitive to surface and near-surface defects.
波，或称压缩波，在其传播过程中在同一方向交替压缩和拉伸介质（见上图）。
The P wave, or compressional wave, alternately compresses and expands material in the same direction it is traveling.
压缩波的合并产生激波，它的强度被随后并入的压缩波或膨胀波分别增强或减弱。
Shocks are formed by merge of compression waves with each other and its magnitude is enhanced or declined by catching compression waves or expansion waves behind the shock respectively.
本文研究了无限各向同性基体中的滑动界面球形单夹杂对平面压缩波的散射问题。
This paper studies the scattering of plane compressional waves by a spherical inhomogeneity with a sliding interface embedded in an infinite homogenous media.
从动应力等值线图上也可分析出强夯作用时压缩波、剪切波、瑞利波的作用范围。
The effective range of P-wave, S-wave, R-wave could be analyzed from the contours of dynamic stress.
根据激波理论，爆炸产生压力脉冲并以压力波的形式传播，既有压缩波也有膨胀波。
According to the shock theory, the ejecta produced by explosion form the pressure pulse, and it spreads in forms of either compression waves or expansion waves.
溃坝洪水波通常为迅变或间断流动，同时兼有急流和缓流、压缩波和稀疏波等流态。
Dam-break flood waves often vary rapidly or even discontinuously, with both rapid and tranquil flow behaviors, as well as both compression and rarefaction waves.
下行压缩波与上行波衰减规律不同，其中上行拉力波比下行波衰减快；上行压缩波比下行波衰减慢。
Wave amplitude decay in different ways by downward compressive wave and upward wave, the upward wave decay slower than the downward wave.
为了降低噪声的影响，对高速列车穿越带有竖井的隧道时产生的压缩波进行了三维粘性流场数值模拟。
To decrease the effect of compression wave, the numerical simulation of a three-dimensional viscous flow induced by a high-speed train entering tunnels with a shaft was made.
在讨论了这种近似的适用条件后，分别用它就一维流的情况研究了连续流、稀疏波和压缩波以及激波等运动形态。
After discussing the conditions under which this approximation could be used, it is applied to study various 1-dimensional flows: continuous flows, rarefaction, compression waves and shock waves.
将饱和土作为二相介质，考虑土骨架和孔隙流体之间的摩阻力，建立了饱和土中一维压缩波传播的二相动力分析控制微分方程，采用有限差分法求解。
In this paper, the saturated soil is dealt with as a two phase media. Thefric 'ion between the soil skeleton and porous liquid is considered.
进气口的上部为进气口混合斜面设计，这样设计的目的是为了产生斜振波以帮助进气压缩过程。
The upper portion of the air intake is incorporated with an intake ramp designed to generate a rearward leaning oblique shock wave to aid the inlet compression process.
他们可能意识到声音是通过空气传播的波，并可能有声音传播时空气压缩的概念。
They probably realized that sound was a wave propagating through the air and may have had a notion of the compressibility of air during sound propagation.
当高速行进的超新星冲击波与稀薄的星际气体相撞时，气体受到压缩和加热，因此而发光。
As the supernova blast wave slams into tenuous clouds of interstellar gas, the resulting collision heats and compresses the gas, causing it to glow.
火球最初的迅速膨胀剧烈地压缩着周围的大气，产生了威力巨大的冲击波。
The initial rapid expansion of the fireball severely compresses the surrounding atmosphere, producing a powerful blast wave.
设想开车经过一处监速站，当你的车开向监速站时，从你的角度看监速站雷达发出的电磁波似乎被压缩过——当然，如果你的眼睛能辨别出这种微小的差别的话。
Imagine driving past a police radar. As your car approached, the electromagnetic waves from the radar would look slightly shrunk to you — if you could see them — when they reached you.
强烈的恒星风压缩加热了星际尘埃，并在前方形成弧形的震荡波。
Its strong stellar wind precedes it, compressing and heating the dusty interstellar material and shaping the curved shock front.
本文提出了一种利用相邻QRS波的相关性进行最小均方差预测的心电图压缩算法。
A novel electrocardiogram compression algorithm based on minimum root-mean-square error prediction utilizing the correlation of adjacent QRS wave is proposed.
实验证明，基于3维小波变换的3维SPIHT编码算法在对超光谱图像压缩时，表现出了优良的率失真性能。 并且算法复杂度适中，具有嵌入式特性。
The test results show that the 3D SPIHT algorithm based on 3D DWT for hyperspectral images compression is very efficient, the algorithm is embedded and has modest complexity.
文中的大量实验结果表明，小波变换同传统的DCT变换相比较有很大的优越性，在视频压缩中也必将取得更广泛的应用。
Many results show a fact that, compared with traditional DCT transform, wavelet transform has a great advantage, and it will surely be broadly used in video compression.
正如，或因为它是高度压缩的空气和燃料，也引爆了冲击波酷暑。
As, or because it is highly compressed, the air-fuel is also detonated by the intense heat of the shockwave.
建立了基于小波变换的运动图像编码系统模型，实现了数据的高效压缩并得到了良好的恢复图像。
A system model of image sequence coding based on wavelet transform is established. Then a high data compression ratio is realized and satisfactorily reconstructed image can be obtained.
采用倾斜阵列压缩器技术制作的声表面波色散延迟线已成功用于许多脉冲压缩系统中。
SAW dispersive delay lines using the slant array compressor technique have been applied to the pulse compression systems.
声音是由压缩空气波造成的。
声音是由压缩空气波造成的。
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