摩擦力

For sliding contact, the coefficient of kinetic friction Uk is defined as the ratio of the frictional force to the normal force

滑动接触时，动摩擦系数Uk的定义是摩擦力与法向力的比率。

For sliding contact, the coefficient of kinetic friction Uk is defined as the ratio of the friction al force to the normal force

滑动接触时，动摩擦系数Uk的定义是摩擦力与法向力的比率。

"Kinetic friction arises between surfaces in relative motion, static friction acts between surfaces at rest with respect to each other"

动摩擦力存在于相对运动之表面间，静摩擦则存在于静止的表面间，。

The influence of kinetic friction force on the penetration depth into granites is analyzed. The equations of resistance and depth for normal penetration into granites by rigid projectiles are presented.

通过分析动摩擦力对侵彻深度的影响，得到刚性弹丸垂直侵彻花岗岩时的阻力和深度计算公式。

Sometimes Albertine's face looks dull and sullen, sometimes glowing and sultry; sometimes his gaze is arrested by the pink tip of her kittenish nose, sometimes his eyes slide over her rosy cheeks as if they were as frictionless as the surface of a painted miniature.

有时艾伯丁的脸看起来沉闷不快，有时又容光焕发风骚迷人；有时他的眼神被她小猫一样红红的小鼻尖吸引，有时他的眼光又会避开她玫瑰般红润的面颊，好像那面颊是一小幅光滑如镜的画，没有半点摩擦力。

Another reason is the key long-term use, flexibility has become very poor spring reset, shrapnel and by friction under large, can not button up caused by card key, which took place in a long time due to the use of the keyboard.

另一个原因就是按键长久使用后，复位弹簧弹性变得很差，弹片与按杆摩擦力变大，不能使按键弹起而造成卡键，此种原因多发生在长久使用的键盘上。

It is the product of the frictional force times the length of the leer arm; that is, the distance a gien point on the surface of the head moes during a gien arc of motion Fig.

摩擦扭矩是在负重髋关节作弧形运动时产生的，其大小为摩擦力与杠杆臂长的乘积，杠杆臂长即股骨头表面一点在一个运动弧内移动的距离（图7－10）。

Ligature was the most significant factor that affected the frictional force.

结扎方式与结扎力是对摩擦力影响最显著的因素。

In Chapter 2, a general model of an irreversible fluid flow system is established, in which the linear and nonlinear fluid flow resistances and the friction forces with different types are taken into account.

在第二章中，建立不可逆流体流动系统的一般模型，模型中同时考虑线性与非线性流阻和不同类型的摩擦力。

The neural networks correction method combining the local map with radial based function networks and the global map with linear transform was applied to calculate the deformation resistance of the strip and the friction coefficient in the rolling deforming region.

采用径向基函数的局部映射和全局线性映射相结合的神经网络校正模型求解带钢变形抗力和轧制变形区的摩擦因数；并采用轧制变形区离散化方法分析轧制变形区内张力、摩擦力及金属变形抗力等在带钢轧制方向上的分布规律，从而建立轧制力在线计算数学模型。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。