查询词典 constant acceleration

Contributions of the centripetal acceleration in steady flight, the tangential acceleration due to the effect of the angular acceleration, the Coriolis component of acceleration, the radial (the vertical direction at prototype), circumferential and axial (the two horizontal directions at prototype) shaking effects and the elongation effect of the centrifuge arm to the global acceleration of a particle in centrifuge modelling are identified in the expression of the global acceleration.

笔者描述了整体加速度表达式中各项的物理意义，指出了离心机稳定运转时的向心加速度、由角加速度效应引起的切向加速度、互补加速度分量、径向、环向和轴向振动效应以及离心机臂伸长效应对整体加速度的贡献。

The acceleration profile of the crane motion is designed to induce minimum payload pendulation during transpo rt,while the deceleration stage is designed to ensure freed om of residual oscillation near the end of the transport,and to deliver the payload at the target point.The techniques induce payload pendulation at least one half ofan oscillation cycle or integer multiples during each of the acceleration and deceleration stages.Starr(1995)designed a symmetric two-step acceleration and deceleration profile to transfer a suspended object.The duration on the constant acceleration steps is assumed to be negligible relative to the period of the payload oscillation.A linear approximation method of the oscillation period is used to generate the two-step symmetric acceleration profile.

3.1投入成型技术，各种形式的投入shapers ， convolved参考命令，产生形投入指挥，驾驶起重机提出一套距离沿一套path.the加速度概况起重机议案旨在诱使最低载重pendulation期间transpo rt ，虽然减速阶段，目的是确保freed om残余振荡接近尾声的运输，并交付载荷到达目标point.the技巧诱使载荷pendulation至少一半ofan振荡周期或整数倍数。

Afterwards, we propose a new constant coefficients measurement method in dynamic equation of robot manipulators, this measurement method includes three groups of experiments: group one, let each joint of robot manipulator keep static to measure the constant coefficients in gravity term of dynamic equation and Coulomb frictional torque, group two: let only one joint of robot manipulator move at a constant velocity to measure the viscous frictional coefficient and constant coefficients in effective inertia of dynamic equation, group three: let only one joint of robot manipulator move at constant acceleration at a time to measure constant coefficients in Coriolis and centrifugal term and coupling inertia of dynamic equation.

让操作器单个关节恒速运动，在对驱动系统中传动机构，减速装置和电感系数综合考虑的基础上，这组实验对粘滞摩擦系数及有效惯量中常数系数进行测量。这种测量方法只要求旋转关节的驱动电机施加恒定电压，回转关节驱动电机施加正弦波电压。3。让操作器单个关节恒加速运动，这组实验测量动力学方程中哥氏力、离心力项和耦合惯量项中的常数系数，这种测量方法只要求单个关节匀加速运动，而其它各关节保持静止，这种测量方法虽然要求关节匀加速运动，但不必进行关节角加速度检测，而只需进行关节角位移和角速度检测即可，输入量直接给定为输入电压。

At last , some investgation is made to change about elementary constant of the universe in today ,which demonstrates that elementary constant of the universe in today would change at a ratio of 2.3387723548904887*1050 per year which means that elementary constant of the universe in today would remain as an constant unchanged within one million years if its accuracy fix on the 4th digit after radix point of 7.7577806787995708*1060 As a reminder , both elementary constant of the unvierse elementary constant of the unvierse in today have nothing to do with the cosmic constant introduced by Mr.

基本宇宙常数是一个变化的物理常数，其数值变化的速率为：2.3387723548904887*1050 ，与今天基本宇宙常数7.7577806787995708*1060 相比较，如果在保持今天宇宙常数的数量级不变的情况下将精确度选定在小数点后第4位，那么今天基本宇宙常数将在100万年之内保持不变。

The analysis results indicate that the vibration fractional factor with rotating frequency has a close relationship with both rotating speed of rotor and damping of bearing under constant acceleration. When rotating acceleration is small and damping is large, the transient response is not sensitive to the variation of rotating speed; otherwise the imbalance response with constant acceleration and the response in stable state will build up obvious differences near critical rotating speed.

研究结果表明：在恒加速条件下，转子同频振动分量与转子的转速、支承阻尼等因素密切相关，当角加速度较小且阻尼较大时，其瞬态响应对转速的波动不敏感；而当角加速度较大或阻尼较小时，恒加速过程不平衡响应与稳态响应在临界转速附近将产生明显的差异。

With coupler embedded and acceleration sensitivity compensation design, the structure symmetry is insured, which can induce the acceleration sensitivity effectively. The acceleration sensitivity compensation design also improves the production efficiency of FOH for towed linear array application.2. A good theoretical simulation platform, utilizing the method of elastic mechanics and the finite element method, is established, which can provide an effect predictive design for FOH. The experimental results are in good agreement with the theoretical analysises.3. Some key technology problems in the making of FOH for towed linear array application are conquered. The new developed FOH, with an acoustic sensitivity of -143.0dB, has acceleration sensitivity less than -30dB, which exceeded to results from other international reports.

本论文的主要成果和创新在于：1、提出了耦合器内嵌、带加速度灵敏度微调补偿的低加速度灵敏度光纤水听器结构，最大程度保证了工艺结构的对称性，实现了对工艺误差的有效补偿，提高了低加速度灵敏度光纤水听器研制的成品率。2、采用弹性力学和有限元方法建立了拖曳线列阵光纤水听器理论设计平台，实验与理论分析结果相一致，这为优化光纤水听器的结构设计提供了有效的技术手段。3、解决了拖曳线列阵用光纤水听器制造的关键技术问题，研制出声压灵敏度为-143.0dB，加速度灵敏度低于-30dB的拖曳线列阵用光纤水听器，其加速度灵敏度优于国际上已报导的结果，并在国防水声一级计量站对其进行了性能指标测试(来源：A14BC论文网www.abclunwen.com)。

With the increasing of the overburden layer thickness or the dam height, the maximum value of response acceleration in dam body assumes gradually decrease, and its characteristic distribution is uniformization, and the response acceleration of the dam slopes decrease remarkably, and response acceleration of the dam top is less than the dam bottom.With the decreasing of the overburden layer thickness, the dam foots and their nearby soil response acceleration get increasing.

随着覆盖层厚度增大或坝高增大，坝体中的反应加速度最大值分布具有逐渐递减、均匀化的变化特征；坝坡体的反应加速度递减显著的变化特征，坝顶反应加速度较坝底反应加速度小的特征；覆盖层厚度越小，坡脚及其附近土体的反应加速度越大的特征。

Based on test conditions of these two acceleration weathering methods in NES M1041,possibility is discussed on Xenon Arc Lamp Acceleration Weathering Test Substituting Sunshine Carbon Arc Lamp Acceleration Weathering Test in vehicle'acceleration weathering tests.

因此，在研制相应部品时，必须模拟自然使用条件对其进行老化测评。为了能快速评估材料的抗老化性能，在进行高分子材料的老化试验中，采用了人工加速老化的方法。目前人们常用的人工加速老化试验有氙弧灯、荧光紫外灯、金属灯和碳弧灯老化等。

Gravitational constant , Planck constant , speed of light constant , Boltzmann constant , Avogadro constant , also to predict two undiscovered physical constants whose physical dimensions are C kg^-1 and K A^-1 respectively

万有引力常数，普朗克常数，光速常数，玻尔兹曼常数，阿夫加德罗常数，并预测两个尚未发现的基本物理常数，这两个基本物理常数的量纲分别是C kg^-1 和 K A^-1

It consists of circuitry that this constant current circuit stabilizes the criteria of a highly precise returned type constant current circuit of operation in another constant current circuit,Furthermore, the voltage amplification with very high stability is realized by adopting this constant current circuit also as the bias circuit of a first rank cascode and the 2nd step cascode, and the 2nd step constant current load intensity.

它由电路，这恒流电路稳定的标准，一个高度精确的返回式恒流电路的运行在另一恒流电路，此外，电压放大具有极高的稳定性，实现了通过这项恒流电路也作为偏见电路的第一级和第二栅栅一步，和第二步骤恒定电流负荷强度。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。