声速

I had simply encountered a new advertising medium: hypersonic sound.

我曾简单地遇到一个新的广告媒介：高超声速声音。

By analyzing the results obtained above, the dynamic characteristics and flight specialty of hypersonic vehicle can be understood.

此外，还能为高超声速飞行器的飞行控制系统设计提供适当的被控对象。

Hypersonic vehicles represents future trends of military equipments and play an important role in future war.

高超声速武器是军事装备的发展方向，在未来战争中起着重要作用。

The results obtained here provide a reference for the application of detonation in the hypersonic propulsion.

当前研究为爆轰燃烧在高超声速推进中的应用提供了重要参考。

Furthermore, it is possible to provide appropriate objects to design flight control systems for hypersonic vehicle.

针对高度非线性和强耦合的高超声速飞行器数学模型，引入了反馈线性化原理，将其非线性的数学模型转化成符合控制设计要求的等效线性模型。

With the progress of the research and application of modern aerospace technology, the development of hypersonic vehicles has been pushed to a new climax.

伴随着航空宇航技术的研究及应用的不断发展，高超声速飞行器的研制逐渐步入高潮。

On the basis of these results, the relations of total-pressure recovery coefficient or flow coefficient and flight mach number, angle of attack and the second movable wedge angle of the inlet have been founded by hypersurface fitting, then the mathematical model of the inlet is established.

根据流场计算结果并利用超曲面拟合方法建立了进气道总压恢复系数、流量系数与飞行马赫数、进气道攻角及二级可调斜板角度之间的关系，由此得到了二元混压式超声速进气道数学模型。

Such avelocity is on the order of the sound speed, and can be easily explained by thegravitational infall of material from the circumstellar dust shell.

这个内落运动速度值基本与声速同一量级，很容易通过引力加速拱星尘埃壳层的物质来获得。

And to study match of inlet and engine as well as the control of inlet.

并可用于进气道与发动机的匹配以及超声速进气道控制研究。

Measuring sound velocity in the air using stationary wave method is discussed in this paper,phase comparison method and Lissajous figure method both could determine the wave length of ultrasonic wave.

1引言在大学物理实验教学中，测量空气中的声速用传统的共鸣管方法和超声波方法。

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。