| 1. | When a body is at rest, or in motion with constant velocity, the external force acting upon it are in equilibrium .
当物体处于静止或作匀速运动时，作用在其上的外力是平衡的。 |
| 2. | If you were content to remain at rest or in uniform motion relative to an unaccelerated frame of reference, no force would be needed .
如果你愿意相对于一个非加速的参照系去保持静止或匀速运动，并不需要有力作用。 |
| 3. | In the absence of force , a body will either remain at rest or continue to move with constant speed in a straight line
没有外力，物体不是保持静止，就是一直沿著直线作匀速运动。 |
| 4. | A scheme is proposed to derive natural frequencies and modal functions of a beam under the given boundary conditions and moving axially at a constant speed
提出在给定边界条件下确定一匀速运动梁固有频率和模态函数的方法。 |
| 5. | The constitutive equation is a euler form to a reference which has initial stresses ( or residual stresses ) , the constitutive equation also refers to a motion of constant velocity along a straight line
该本构方程是参考具有初始应力场（或残余应力场）的直线匀速运动状态而建立的空间描写形式。 |
| 6. | For the convenience of adjusting the welding torch , the welding torch is made to move with a even speed in x axes direction and is adjusted in y axes direction according to the data read , so that real - time seam tracking is implemented
为方便调整焊枪，可以让焊枪沿x轴匀速运动，根据读来的数据实时调整y轴的运动，这样就可以实现实时跟踪了。 |
| 7. | Simulations also show that signals of the target should be received continuously and accurately . in chapter five , mgekf algorithm is given to evaluate the velocity and position of the target . mgekf equations are introduced in detail
文中详细介绍了mgekf滤波方程的推导过程，仿真结果验证了这一处理算法在目标固定不动和目标以某一速度匀速运动两种情况下的有效性。 |
| 8. | The dynamic model in the spherical coordinate is presented for bearing - only target positioning . however , such model has unknown covariance of process noise , which is related to the range between the target and the passive sensor
简要概述被动定向跟踪，推导了球坐标系下的匀速运动目标的定向跟踪模型；状态建模的不完备性引起了模型噪声方差阵带有未知径距参数，因而需要解决参数在线辨识问题。 |
| 9. | We present " c - imm extended map - tuned variance method " to combine c - imm and extended map - tuned variance method . simulations show that : the performance of target tracking is improved by using c - imm extend map - tuned variance method when target is on road or junction
理论分析和仿真表明，基于多模型的“ c - imm扩展地图调整方差法”对于目标在道路交叉点时，或者目标在道路上匀速运动时，跟踪性能有所改进。 |
| 10. | The newton the first laws finger object is had the character keeping original motion state , the inertia theorem is also called : under the circumstances of not accepting an outside force or being accepted an outside force by zero , the object always keeps uniform motion or motionless
牛顿第一定律指物体具有保持原来运动状态的性质，也被称为惯性定理：在不受外力或所受外力为零的状态下，物体总保持匀速运动或静止。 |
