加速度

This article gives five new methods of proving acceleration of circular motion.

本文给出了5种区别于现行大学物理教材的求证圆周运动加速度的新方法。

To realize the automatic steel billet snagging, the snagging path planning is accomplished. At the corner of the path, a duality clothoid ensures the continuous variation of velocity and acceleration.

结合目前亟待解决的钢坯局部修磨自动化问题进行了修磨轨迹规划，在轨迹的拐角处采用了一种对偶形式的回旋曲线进行过渡，保证了机器人在运动过程中速度和加速度的连续变化性。

And these 6 influential factors were analyzed with the experiment by means of range, variance and regression analysis. During the analysis, the evaluation criteria were the acceleration of rolling rock movement and the restitution coefficient of collision velocity between rolling rock and slope surface.

在试验基础上，采用极差、方差和回归分析等手段，以滚石运动的加速度和滚石与坡面碰撞速度恢复系数作为评价指标，对影响滚石在斜坡上运动特征的6个因素进行分析。

Simulation results show that fuzzy scheme can effectively attenuate the vertical vibration acceleration and increase the riding comfortableness.

仿真结果表明模糊控制能够使系统较好地抑制垂直振动加速度，提高乘坐的舒适性。

Thirdly, a new type base isolation system, i. e., slide-limited friction base isolation system is presented in this paper. Based on this system, harmonic and subharmonic periodic response of S-LF subjected to harmonic motion is investigated by using Floquet theory. Dynamic response of sliding structure subjected to earthquake ground motion is calculated with a precise high order direct integration method, and the numerical results are presented in terms of maximum acceleration response spectra of supcrstructure and maximum sliding displacement response spectrum. By comparison with isolating effects of pure-friction base isolation system and resilient-friction base isolation system , it shows that the isolating characteristic of S-LF is superior to P-F and R-FBI. Through analyzing an engineering example, it is observed that the maximum inter-storey shear force and absolute acceleration of sliding structure to earthquake ground motion are very different from those of traditional structures.

提出了一种新型基础隔震模型，即带限位装置的摩擦隔震体系；基于此隔震模型，利用Floquet理论研究地面谐运动下S-LF结构的运动特性；并利用高精度的精细时程积分法，通过对地震作用下S-LF动力响应的计算，绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱，并研究了各种结构参数对隔震的影响；通过与恢复力摩擦隔震系统和纯摩擦力滑移隔震系统的比较表明，S-LF的隔震性能优于P-F和R-FBI；对计算实例的分析发现，地震作用下S-LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。

Dynamic response of sliding structure subjected to earthquake ground motion is calculated with a precise high order direct integration method, and the numerical results are presented in terms of maximum acceleration response spectra of supcrstructure and maximum sliding displacement response spectrum. By comparison with isolating effects of pure-friction base isolation system and resilient-friction base isolation system , it shows that the isolating characteristic of S-LF is superior to P-F and R-FBI. Through analyzing an engineering example, it is observed that the maximum inter-storey shear force and absolute acceleration of sliding structure to earthquake ground motion are very different from those of traditional structures.

提出了一种新型基础隔震模型，即带限位装置的摩擦隔震体系；基于此隔震模型，利用Floquet理论研究地面谐运动下S-LF结构的运动特性；并利用高精度的精细时程积分法，通过对地震作用下S-LF动力响应的计算，绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱，并研究了各种结构参数对隔震的影响；通过与恢复力摩擦隔震系统和纯摩擦力滑移隔震系统的比较表明，S-LF的隔震性能优于P-F和R-FBI；对计算实例的分析发现，地震作用下S-LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。

The computational formula on pressure increment in bottomholes affected by drilling speed is deduced as well.

首先利用在钻井过程中随钻测量起钻后地面回旋的方法，自行研制开发出能够抗180℃高温，具有抗震功能的测量仪器；其次，在原有模型基础上，利用实例数据进行分析，考虑固相和多相流加速度压降的影响，研制开发了流钻欠平衡钻井环空多相流井底压力的计算模型，并推导出机械钻速影响井底压力增量的计算公式；最后，为验证模型精度，开发了钻井监测与分析计算软件，软件计算结果与实测数据叶比，误差小于3%。

Why a higher spatial dimension is ingressing at an ever-accelerating rate into space-time we shall perhaps not understand until we achieve, through a concrescence of time, a return to the higher topological dimension.

为什么一个更高维度是永远-加速度进入时空的入口，直到我们达到了我们才能理解，通过一个时间的愈合，返回到更高拓扑维度。

The simulation results show that the improved conjugate method is effective and can perfectly intercept the target acceleration information.

仿真结果表明，改进共轭法有效并可以很好地捕获目标的加速度信息。

This paper presents a method to formulate three motion constrain equations which are consistent with the kinematic structure of the mechanism, and model...

本文根据这种机构的结构特点，给出了操作平台的输出运动参数的三个运动约束方程，并且建立了三个独立输出运动参数和三个独立运动输入参数之间的速度和加速度关系的显式数学模型，为这种机构的运动分析提供了简便有效的数学工具

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失