声速

Endothermic hydrocarbon fuel is one of most crucial technologies in the development of hypersonic propellant system.

吸热碳氢燃料及其应用研究已经成为高超声速推进系统研发中的重大关键技术之一。

The sound velocity of enstatite is measured with the optical analyzing method at the pressure range 40-140Gpa.

在40-140GPa冲击压力范围内，用光分析技术测量了顽火辉石高压相的五个压力点上的声速值。

In this disseration, Hugoniot equation of state and sound velocity of enstatite at high pressure are studied under shock compression and their application in geophysics are discussed.

本文试图用冲击压缩实验方法，通过研究顽火辉石在下地幔压力区的Hugoniot状态方程和高压声速，并结合由地震学研究提出的PREM模型进行综合对比和分析，进一步澄清下地幔的主要组成矿物及其相态等问题。

Using the data of sound velocity experiments, static high-pressure research and geophysics, the temperature coefficient of enstatite′s compressional wave velocity, thermal and density anomalies in lower mantle are estimated.

在上述的数据分析过程中，还得到了下地幔区钙钛矿型SiO〓相态纵波声速的温度系数，并由此估算出下地幔底部的温度异常幅度为65-137K，〓约为2.8/。

The three dimensional flow field with inner energy excitation and the variable flow conditions were studied with Direct Simulation of Monte Carlo method.

本文研究了带内能激发松弛和不同来流条件下的复杂外形高超声速飞行器过渡区三维流场特性。

Put forward excellent velocity of sound aero faintness from adaptive control method.

梗概： 提出了高超声速飞行器的模糊自适应控制方法。

Based on the prior information obtained by qualitative inversion, the two stages inversion method was put forward. That is, the first stage is that distinguishing the high-quality element and non- high-quality element, and determining the initial iteration value of element sound velocity reasonably. The second stage is that treating differentially the constraint weights of the high-quality element and non- high-quality element, and then quantitatively inversing the final sound velocity distribution. The results of two concrete specimens indicate that the two stages inversion method can inhibit artifacts effectively and has better defect identification effect than normal one stage inversion.

在获取定性反演先验信息的基础上，提出了两阶段反演的方法：第一阶段，区分优质像元和非优质像元，合理确定像元声速的迭代初值；第二阶段，区别对待优质像元和非优质像元的约束权重，定量反演最终的速度分布。2个混凝土试件的模型试验表明，两阶段反演能有效抑制伪像，具有比常规的一阶段反演更好的缺陷识别效果。

A new method of quickly generating hypersonic waverider forebody configurations was developed.

发展了一种基于分析法的高超声速乘波构型飞行器前体设计方法。

Based on thermodynamics,the relationship between the ideal-gas heat capacity at constant pressure and the speed of sound in the gaseous phase was analyzed.

在本套实验系统上测得了一批高精度的新环保制冷剂的气相声速数据，并可进一步确定其理想气体比定压热容。

Systematic study is carried out to the main factors that influence the levitation stability during containerless processing of materials. The effect of the medium density r f , sound speed c , gravitational acceleration g , and resonant states Hm on the acoustic containerless processing is revealed.

对材料声悬浮无容器处理过程中，影响悬浮稳定性的主要因素进行了深入研究，揭示了媒质密度 r f ，声速 c ，重力加速度 g 和声场谐振状态 Hm 对声悬浮过程的影响机制。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。