低渗透油藏比中高渗透油藏的压力波传播速度慢。
And low permeability reservoir is slower than mid-high permeability reservoir in pressure wave propagating velocity.
相同介质中不同频率的弹性波传播速度是有差异的，即频散问题。
The propagation velocity of elastic wave with different frequencies in same medium is various, which is called dispersive problem of frequency.
分析了热油输送管道沿程瞬态负压波传播速度的变化，采取两种搜索方法数值积分求解泄漏点位置。
The velocity change of instantaneous negative pressure wave along the pipeline is analyzed when hot oil is transported. Two searching methods are applied to locate leakage through numerical integral.
着重分析了相间作用力，包括壁面剪切应力、虚拟质量力、拖拽力，对压力波传播速度和衰减的影响。
The interphase forces on the propagation were investigated, including wall shear stress, virtual mass force and drag force.
对比开阀和气压脉冲所形成的两种瞬变流形式的压力波传播速度、压力等参数，发现气压脉冲更能增加管道中水流的紊动程度，冲洗效果更好。
Barometric pulse could cause stronger disordery degree and better flushing effect by comparing the transfer rates of two pressure waves and pressures caused by valve opening and barometric pulse.
海啸波在深海传播速度近似于喷气式飞机，大约15小时后到达海地，20小时后到达太平洋彼岸。
"Tsunami waves in the deep ocean travel about the same speed as a jet plane and would take about 15 hours to reach Hawaii and about 20 hours to reach the other side of the Pacific, " he said.
科学家发现，单个光子的前驱波头一般以光速c传播，就像由大量光子携带的信号的传播速度一样。
The scientists found that the precursor wave front of a single photon always travels at c, like the signal velocity of large groups of photons.
马克思·威尔指出光是种电磁波，其在真空中的传播速度是个常数c。
Maxwell showed that light was a vibration in the electromagnetic field, and that it travelled at a constant speed, c, in a vacuum.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
目的对比研究水下冲击波和空气冲击波的传播速度和物理参数。
Objective To compare the propagation speed and physical parameters between underwater blast wave and air blast wave.
浮桥的抗弯刚度和受弯变形位移波的传播速度都比一般钢桥或混凝土桥小得多。
The stiffness of the long floating bridge and the propagation velocity of displacement wave are much less than those of the general steel or concrete bridge.
本文根据波动理论推导出在重力作用下波的传播速度表达式，分析了微小波动中表面张力的作用。
Based on the mechanics of wave, the expression of water wave propagation velocity under the action of gravity is deduced and the effect of surface tension on small wave is analyzed.
研究了垂直上升管内气液两相泡状流压力波的传播速度和衰减规律。
Experimental investigation was carried out to study the pressure wave speed and its attenuation for gas-liquid bubbly flow in vertical upward tube.
结果表明，波的传播速度并不等于能流速度，而与复群速度的实部近似相等。
The results show that the propagation speed of the wave is not equal to the speed of energy flux, but nearly equal to the real part of the complex group velocity.
岩石介质中爆炸波的特点是压力高、传播速度快，对介质质点的作用在瞬间完成。
The feature of explosion signals in elastic-plastic region of rocks is in the state of high pressure, of high speed, and of transient action on the particle motion.
对于长波长的波，传播速度是常数。
本文用数值计算的方法研究流动稳定性问题中小扰动波的传播速度。
In this paper, by using the direct numerical simulation method, the propagation speed of small amplitude disturbances in the problem of hydrodynamic stability is investigated.
以应力波理论为基础，建立了丝杠冷滚打的应力波模型，获得了滚打过程中应力波的传播规律及传播速度。
Based on the stress wave theory, stress wave model of lead screw cold roll-beating is built, stress wave transfer rule is obtained and the speed of stress wave is calculated.
研究结果表明：冲击波在镁合金中的平均传播速度与应力波中纵波的传播速度基本一致；
The results show that the average velocity of the shock wave attenuation in magnesium alloy is in good agreement with the propagation velocity of stress longitudinal wave;
研究结果表明：冲击波在镁合金中的平均传播速度与应力波中纵波的传播速度基本一致；
The results show that the average velocity of the shock wave attenuation in magnesium alloy is in good agreement with the propagation velocity of stress longitudinal wave;
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