查询词典 shock wave

For instance, the perturbation may transform a strong detonation into a weak deflagration followed by a shock wave. This interesting phenomenon also appears in the numerical solutions in [58]. Our results give a reasonable explanation to this phenomenon.

例如，扰动会将一个强爆轰波变为一个波后为激波的弱爆燃波，这种现象亦出现在数值解[58]中，我们的结果为这种现象提供了一个理论的解释。

Based on optical beam deflection,a fiber-optic diagnostic system is proposed to investigate the propagation of a laser-induced plasma shock wave and the oscillation of a cavitation bubble .

实验得到了激光等离子体冲击波传播规律和空泡的动力学特性。

This dissertation is concerned with the kinetics of the nonequilibrium dissociation and ionization of gases that are significant in the high temperature gas dynamics. There are two parts in the dissertation. In the first part, the kinetics of dissociating gas, a theoretical calculation is made of the nonequilibrium dissociation of the diatomic molecule behind a strong shock wave front.

中文题名高温气体解离和电离动力学研究副题名外文题名 The study of the kinetics of dissociation and ionization in the high temperature gases 论文作者王苏导师崔季平何宇中研究员范秉诚高级工程师学科专业一般力学研究领域\研究方向学位级别博士学位授予单位中国科学院力学研究所学位授予日期2001 论文页码总数125页关键词气体动力学电离复合非平衡解离速率振动－解离耦合馆藏号BSLW /2003 /O354 /1 本论文选取在高温气体动力学中具有重要意义的气体非平衡解离和电离动力学作为研究对象，包括两部分内容。

In addition, the velocity and pressure distribution of the laser-induced plasma shock wave as a function of distance is presented.

进而采用自行研制的光纤传感器跟踪探测等离子体冲击波的形成及发展过程，从实验验证了该理论模型的正确性。

When this happens, a shock wave hits the earth and may break windows or cause ceilings to crack.

当声爆发生时，冲击波击打地面，可能震破窗户或造成顶棚破裂。

When this happens, a shock wave hits the earth and may break windows or cause ceilings to

当声爆发生时，冲击波击打地面，可能震破窗户或造成顶棚破裂。

When this happens, a shock wave hits the earth may break windows or cause ceilings to crack.

当声爆发生时，冲击波击打地面，可能 www.ssBBww.cOm 震破窗户或造成顶棚破裂。

The rapid expansion of the bubble of hot, high-pressure gases formed in the underground burst initiates a shock wave in the earth

由于地下爆炸所形成的热高压气泡迅速澎胀，在地面上便产生冲击波。

The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when 210 generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air.

从热传导方程和雪崩电离机制出发，假设当电子增值2~(10)倍时，考虑了温度对材料热力学和光学参数的影响时，得到了气化和等离子体点燃的时间，利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致；提出了利用刀刃法测量激光光斑面积的方法，并通过实验进行了验证和误差分析；利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断，激光器均为调Q—YAG激光器(波长1064nm，532nm，355nm，脉宽10ns)，靶材分别为Al、Fe和Cu，两种测试方法得到的等离子体点燃阈值基本一致；本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响，均得到了等离子体点燃阈值随着波长的增加而减小的结论；对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究，得到了金属在水中的等离子体点燃阈值比空气中的大，且水中产生的冲击波的压强是空气中的5倍左右的结论。

The main point of the improvement is adding a circuit branch with an etalon resistance connected in series in it , for monitoring the shock-wave arrival time entering the sample, in the measuring electrical circuit .

Mitchell等的测量冲击压缩下绝缘材料电阻率的技术做了改进，其主要之点是，在测量电路中增加了一个记录冲击波进入试件的电支路，并在新支路中串接一个基准电阻。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。