This is called a rarefaction and is represented by widely spaced dots.
这个区域称为稀疏区，并用疏散的小点表示。
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。
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。
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 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。
The classical elementary waves in Riemann solutions include rarefaction wave, shock wave and contact discontinuity.
黎曼解涉及的经典基本波包括疏散波、激波和接触间断。
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。
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。
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。
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。
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。
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。
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 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。
After discussing the conditions under which this approximation could be used, it is applied to study various 1-dimensional flows: continuous flows, rarefaction, compression waves and shock waves.
在讨论了这种近似的适用条件后，分别用它就一维流的情况研究了连续流、稀疏波和压缩波以及激波等运动形态。
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。
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。
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