英语释义

• a decrease in the density of something;

  "a sound wave causes periodic rarefactions in its medium"

片语

Rarefaction gas稀薄气体

gas rarefaction稀薄气体

rarefaction defect疏松缺陷

Rarefaction curves生成稀释曲线

rarefaction parameter稀薄参数

Rarefaction Treatment疏化处理

rarefaction fan稀疏翼

rarefaction wave[流] 稀疏波；膨胀波；余波

英汉例句

• rarefaction effect tends to make supersonic flows move smoothly, and to enlarge the influence domain of cylinder.

  稀薄效应趋于弱化激波等超声速流动结构，物体影响域增大。

• this paper presents an experimental technique of diaphragm bursting by virtue of the rarefaction wave in double driver shock tube.

  本文介绍了在双驱动激波管中运用稀疏波破膜的技术。

• yanqing county forms an orderly urban layout combining rarefaction and density and the garden city scene with both mountain and water and distinctive characteristics.

  延庆县城形成了错落有致、疏密结合的城市布局和山水相间、特色鲜明的园林城市风貌。

• the results show that the rarefaction wave influences the premixed flame structure and propagation greatly.

  实验过程中，通过不同的点火方案诱导出不同传播方向的稀疏波与火焰发生干涉作用。

• in the light of the shortcomings of small leakage diagnosis of oil pipe line, a new leakage detection method based on modified rarefaction wave diagnosis model is presented.

  针对国内外对输油管道小泄漏诊断工作存在的不足，研究了一种基于改进的负压波诊断模型的泄漏诊断方法。

• he believed that the changes things undergo could be explained in terms of rarefaction and condensation of air.

  他相信物质的改变可以被解释为一系列的气体的稀释和浓缩。

• rarefaction effect on supersonic flow fields in the transition from near continuum to near free-molecule flow is analyzed numerically.

  从近连续流到近自由分子流，计算分析超声速流场的稀薄效应。

• results there was contusion and hemorrhage in brain tissue, rarefaction of nerve blanket, swelling in neuroglial cells and axonal injury in white matter;

  结果脑组织挫伤出血，神经毯疏松，神经胶质细胞肿胀，白质内大量轴索损伤；

• in the second part of chapter 2 we give a new measure about the rarefaction waves, and a sharp decay estimate of the new measure is established for the cubic nonlinear system of conservation laws.

  在第二部分，我们给出一个新的关于稀疏波的测度，而且给出了三阶非线性双曲守恒律关于这个测度的精确估计。

• to our surprise, the godunov scheme can not be performed well for this system when the riemann solution contains a weak backward rarefaction wave and a strong forward shock.

  出人意料的是，当黎曼解包含一个弱的后向疏散波和一个强的前向激波时，此格式是不适用的。

• the formulas of both reflection shock waves and rarefaction waves are given.

  文中分别给出反射沖击波和反射稀疏波两种情况的迭代收敛计算公式。

• the intensity and the diameter of the laser spot are different at the different defocusing distance, so the rarefaction wave effect and the plasma shielding effect are different too.

  离焦量不同时，由于作用激光的功率密度不同而影响等离子体屏蔽效果；

• after gaseous detonation reflects on the right wall, the right-traveling rarefaction waves accelerate the reflected shock.

  气相爆轰波在右壁面反射后，右行稀疏波加速反射激波。

• objective:for observation and treatment of diabetes followed by rarefaction of bone.

  目的：观察和治疗糖尿病伴随骨质疏松。

• dam-break flood waves often vary rapidly or even discontinuously, with both rapid and tranquil flow behaviors, as well as both compression and rarefaction waves.

  溃坝洪水波通常为迅变或间断流动，同时兼有急流和缓流、压缩波和稀疏波等流态。

• the asymptotic stability of the rarefaction wave has been established for the impermeable wall problem under small perturbation conditions and non-isothermal conditions.

  讨论了半空间中满足无渗透边界条件的一维黏性可压缩热传导流体的流动，给出了在小扰动和非等温条件下稀疏波的渐进稳定性。

• this paper is concerned with the decay rates of the solution to the strong planar rarefaction waves for scalar conservation laws with degenerate viscosity in several space dimensions.

  本文主要研究高维空间中带有退化粘性的标量守恒律方程的光滑解的整体存在性，以及该解逼近强平面稀疏波的衰减率。

• the classical elementary waves in riemann solutions include rarefaction wave, shock wave and contact discontinuity.

  曼解涉及的经典基本波包括疏散波、激波和接触间断。

• the result indicated that the retinal pigment epithelium cytoplasmic rarefaction or condensation, rounded abnormalities of basal infoldings were present.

  结果表明，视网膜色素上皮有胞浆结构不均，基底膜皱折变圆不规则。

• objectives:to study the changes in microvascular rarefaction of retinae in hypertensive rats and patients.

  目的：了解自发性高血压大鼠和高血压患者视网膜微血管变化。

• shannon-wiener index and pielou evenness index were used to compare and check the feasibility of rarefaction in practice.

  多样性指数之间的比较，需要样方的面积大小相等，否则没有实际意义。

• by combining the transient change model method and rarefaction wave method, the multidimensional rules to detect the leakage and locate the leak point were set up.

  并结合管道瞬变模型法与负压波法建立多维判别法则，解决输油管道泄漏检测及漏点定位的问题。

• develop the technique of rice 「three-drought」 tillage, drought breeding and rarefaction plant and seedlings tossing.

  发展水稻「三旱」耕作与旱育稀植抛秧技术；

• it carefully investigates thought background of proposing zero measure set, thought process of proposing asymptotic measure and rarefaction of proposing zero measure set, and influences on m.

  以法国数学家波莱尔的有关工作为核心，重点考察了他提出零测集的思想背景，提出零测集渐近测度和稀疏度的思想演变过程、思想方法及影响。

• through data rarefaction treatment, the double-ordering of the discrete data is realized and the reconstruction of the inner surface of the radome is completed based on bicubic b-spline function.

  通过数据的疏化处理，实现了测量型值点的双有序，完成了基于双三次b样条曲面的天线罩内廓曲面重构。