1、

The Center-of Mass Axis Theorem of Angular Momentum

论角动量的质心轴定理

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2、

But under certain condition, the spindle should be unsteady, this is decided by the relationship of moment of inertia that spindle to each axis of coordinate system, bearings supporting stiffness, revolving speed of spindle and the imbalance mass control, etc.

但在一定条件下,旋转主轴有可能出现不稳定现象,这取决于主轴绕固联坐标系各轴之转动惯量间的关系、轴承支承刚度、主轴旋转速度和不平衡质量控制等因素。

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3、

meanwhile, the reliability and validity of the model with consideration of tire nonlinearity, lateral mass transfer and axis slip are verified by the steady static circular test and steering wheel angle step input test using a unique ( nj1020) car.

同时,以优尼柯轿车作为样车进行了稳态回转和角阶跃操纵稳定性实车试验,对考虑车身侧倾、轮胎非线性和横向质量转移的轴侧偏三自由度模型进行验证。

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4、

Let this be the Y axis and this the X axis, and here at zero I have a mass m.

这是Y轴,这是X轴,质量m放在原点。

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5、

The influences of solar mass-loss on the change rate of the semi-major axis and the orbital period of the earth could be happened while the Sun stays on the main-sequence and evolves as a red giant on the post-main sequence.

利用二体问题的中心体变质量的Jeans理论估计了太阳目前在主序阶段和将来后主序(红巨星)阶段由于上述两种机制造成的质量损失对地球轨道改变的长期效应。

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7、

conversely, a quake can slow the rotation and lengthen the day if it redistributes mass away from that axis, gross said tuesday.

相反地,一次地震可以减缓旋转和一天的长度,如果它将质量重新分配到里轴线跟远的地方,格罗斯周二说。格罗斯说计算出的日长变化是永久性的。

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8、

The origin is located on the axis at the point closest to the center of mass.

原点坐落在转轴上最靠近物体质心的一点.

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9、

The shape of ballistic reentry vehicle generally is axial symmetry, but its mass center may be departure from the axis of its symmetry.

弹道式再入飞行器一般为轴对称旋成体,但其质心可以偏离对称轴。

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10、

Unbalance means the non-uniform distribution of the mass of a rotor about its axis of rotation.

不平衡是指转子相对于其旋转轴质量分布不均匀。

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