查询词典 wave velocity

The phase lag between the pressure wave and velocity wave has been revealed to be accordant with the field synergy principle.

对场协同理论在脉管制冷机中的具体应用进行了研究，数值模拟了小孔型、双向进气型脉管制冷机的动态过程，揭示了脉管内压力波和速度波之间的协同关系。

Based on up_ and down_going wave decomposition and elastic wave power reciprocity theorem, this paper derives, in the lateral velocity varying case, linear prediction operators expression and the generalized spectral factorization equation for reflection dataset.

本文基于上下行波分解及弹性波互易定理，导出横向变速介质条件下线性预测算子的表达式和反射数据的广义谱分解方程。

Various forms of wave equations, definitions of wave number and frequency, derivations of phase speed and group velocity, and a quick discussion on dispersion relationships.

各种形式的波动方程，波数和频率的定义，相速度和群速度的引入，以及一个关於色散关系的小讨论。

sound velocity ; temperature ; stationary wave method ; ultrasonic wave

虽然用超声波测声速具有以上优势，但实验数据的精确度在一定程度上受到超声波信号发生器的稳定性、压电陶瓷换能器的效率、周围环境温度等因素的影响。

There exist some problems in subsalt seismic exploration of Caspian seashore basin, such as salt doom screening, interference wave development, weak energy of reflected wave, shortage of prior data and pseudo-structures caused by velocity anomaly, etc.

哈萨克斯坦滨里海盆地盐下地震勘探存在盐丘屏蔽、干扰波发育、反射波能量弱、先验资料缺乏以及因速度异常引起的构造假象等问题。

At the circumstance of low speed of flow, the standing wave resonances of protruding and trap cylindrical cavities are also studied. The distribution of sound particle velocity and pressure of the standing wave in cavity are analysed.

还进行了陷落式和突出式两种圆柱形腔驻波共振的研究，分析了驻波共振的声场分布，其频率公式与实验值符合很好。

High-quality antral slow-wave recordings were achieved in the intraoperative human trial (amplitude, 0.41 +/- 0.04 mV; SNR, 12.6 dB), and an activation map was constructed showing normal aboral slow-wave propagation at a velocity of 6.3 +/- 0.9 mm/s.

在腹腔镜胆囊切除术中测量试验中，我们获得了高质量的胃窦部慢波电位记录结果（振幅0.41±0.04mV，SNR 12.6分贝），并且显示出正常慢波的离口传播速度为6.3±0.9mm/s。

The inial optimizing value is chosed according to Rayleigh wave with dominant energy in the Lamb's problem and the difficulty of calculating the velocity of Rayleigh wave of transversely isotropic saturated soils is solved.

分析表明：瑞利波速在饱和均质半空间具有弥散性，各向异性参数ζ〓、ζ〓对瑞利波速有明显影响，ζ〓在特征频率附近对瑞利波速的影响较大，在高低频区段对瑞利波的影响较小。

Their left ventricular diastolic function such as E wave ratio,E peak decrase velocity and left ventricular peak filling rate were significantly increased than that of pre-treatment,while indexes relative to A wave remarkedly decreased.

结果：服药1年达到目标血压的80例患者均可使左心室舒张功能的有关指标：E波速率、E峰减速度和左室峰充盈率较治疗前明显增加，而A峰有关指标明显减低。

This paper discusses several aspects of seismic body wave tomography,which are velocity discontinuity being introduced in the model,body wave multi-phase being utilized,and teleseismic data out of the study region being inverted simultaneously.

本文在论述地震体波成像中速度模型间断面的引入、体波多震相的利用等优越性的同时，利用研究区之外、能改善或分辨地球内部更深处的远震资料，得到研究区平均相对走时残差的分布。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。