恢复系数

Base on the elastic-plastic contact theories, the calculation model of restitution coefficient both in normal and tangential impacting direction are studied.

本文将以弹塑性接触理论为基础，研究了滚石法向恢复系数、切向恢复系数的计算方法，运用运动学的基本方程研究了滚石在坡面上的运动特征，推导了相关的公式。

The collisions of rigid bodies is a classical problem, however, the coefficient of restitution is used in the conventional researches to study this problem. The authors present a new way for this kind of problem. A theory of the collision between two rigid bodies in two dimensions, taking account of friction, is proposed according the Newton first law. And the shortages of former researchers are justified.

刚体碰撞是力学上的一个经典问题，但目前大都采用给定恢复系数进行分析的方法，本文则直接从两刚体碰撞时Newton第二定律出发，建立了计及摩擦的两刚体碰撞基本理论，并指出了以往研究通过给定恢复系数方法的错误之处。

Results show that the equivalent mass in normal direction depends on the modes of collision. In the case of reversed sliding and sticking, the coefficient of restitution varies as a result of the instantaneously changes of the equivalent mass during impacting process. The coefficient of restitution depends not only on the contact force, but also on the kinematical and dynamic parameters of the two rigid bodies. Moreover, a formula is proposed to calculate the coefficient of restitution.

指出法向等效质量依赖于碰撞状态，在反向滑动和停止滑动这两状态下的法向等效质量是变化的，因此导致其恢复系数是变化的，这样，恢复系数不仅与接触力有关，而且还与两刚体的运动和动力参数有关，同时给出各种碰撞状态下的恢复系数计算式。

Tested results and analysis show: seed condition has a significant effect on bulk density, a comparatively significant effect on drag coefficient, and little effect on particle density and restitution coefficient of rice seed; moisture content significantly affects bulk density, particle density and drag coefficient of coated rice seed; variety of seed has little effect on the properties of coated rice seed.

试验结果和分析表明：稻种状态对容积密度影响显著，对漂浮系数影响比较显著，对籽粒密度和恢复系数影响较小；含水率对包衣稻种的容积密度、业粒密度和漂浮系数影响显著；品种对包衣稻种的物理特性影响较小。

Among 6 influential factors, only the feature of overburden and vegetation play an important role of controlling the restitution coefficient of rolling rock, which can be expressed by a linear relation.

斜坡覆盖层和植被特征对滚石碰撞恢复系数起控制性作用，其他因素几平无影响；斜坡覆盖层与植被特征和碰撞恢复系数之间可用线性关系描述。

Coefficient of restitution????

回弹系数；恢复系数

Recovery factor is defined to reflect the recovery effect of air compressure and is measured along the heat transfer surface with different nozzle-to-plate spacing and jet velocity at nozzle exit.

以恢复系数来表示因气体压缩性而引起的恢复效应影响，测量其在传热表面的分布规律以及射流喷射间距和射流出口速度等对恢复系数的综合影响。

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。

The article deduces the general expression for the recovery coefficient in solution of dynamic collision, based on on-dimension face-to-face collision and law of particle momentum conservation.

从一维正碰着手，应用质点动量定律，推导出力学碰撞问题中恢复系数的一般表达式，为我们正确理解恢复系数，解决与此相关的问题提供理论支持。

The paper makes up the correlations of restored TOC coefficient to vitrinite reflectance , restored S〓-S〓 coefficient to vitrinite reflectance , Cp/Toc％ to H/C by the results of the Thermal-simulation Experiment.

运用实验结果进行有机碳恢复和生烃潜力的恢复，并建立了有机碳恢复系数、生烃潜力恢复系数和镜质体反射率、Cp/Toc％及H/C的关系。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了