查询词典 velocity limit

The velocity estimated error limit is addressed to reduce the problem caused by it as far as possible.

本文给出了速度估计误差的界限，以便尽量减少速度估计误差引起的问题。

Firstly, This paper processes geometry filtration based on character of orbit's apogee and perigee after orbit model is analyzed and based. Secondly Space Debris is separated into two kinds, coplanar and not coplanar according as location interrelation of target and debris. In Dynamic filtration's processing, considering prediction time limit and orbit perturbation, secular effects which have increaser effect is considered so that some need catching danger time point is appeased, some law about time when target and debris pass intersectant line each other is inferred, when debris and object are in different plane and some similar law also is inferred otherwise. The time list is arithmetical progression. These laws can improve calculation efficiency remarkably; Lastly orbit predict is a course approaching least distance. Danger time point in the last step become beginning time point from which debris and object's position and velocity are calculated by SXP4 Model which is an analytic model.By result, determine that relative movement trend is closer or apart, farther calculate the interval apart from time when predictive least relative distance occurs. Least relative distance and time when least distance occurs is calculated finally. It is a fast approach course adopting varied interval.

本文在分析、建立轨道摄动计算模型的基础上，首先采用基于轨道远、近地点特征对大量编目在册的空间碎片进行初步几何静态筛选，然后根据碎片与目标轨道面的相对位置特点把碎片分为异面与准共面两种情况以进行动态筛选，在筛选过程中考虑到预报时限长度和轨道摄动影响，引入了轨道摄动中具有积累效应的长期项以满足危险时间点的捕捉要求，利用了长期项摄动变化线性的特点导出了碎片与目标异面情况下各自过交线的时间序列成准等差数列的规律性和准共面情况下类似的规律性，从而显著地提高了前期轨道筛选的计算效率；最后对剩余危险碎片和目标飞行器利用SXP4轨道预报模型在前期轨道筛选的基础上以各个危险探测时间点为预报的时间起点，并根据预报计算结果，分析目标和碎片在该时间点的运动趋势是相互远离还是相互接近，推出预计最小相对距离发生时刻相对此刻的时间长度，得到其随时间变化的局部最小相对距离以及危险距离发生的时刻和相对速度，这是一个采用变时间步长、快速逼近最小相对距离的过程。

The simulation results show that a characteristic saw-toothed velocity is generated in vertical, and a lower limit of laser repetitive pulse for stable ascent is defined; In lateral pass, higher frequency of laser pulse can produce quicker reversion and smoother trajectory, and with the increase of slope of lift curve, the lightcraft can be stabilized in shorter time.

结果表明：在垂直方向，光船上升速度呈锯齿状，且存在脉冲频率下限；在侧向，激光脉冲频率越高，回复速度越快，回复曲线也越光滑，升力线斜率的增加能够使光船以更短的时间趋于稳定。

With application of plastic limit analysis method using finite element method, stability of high loess slope is analyzed and solved by using linear programming method in this paper. Safety factor and stress fields and velocity fields of slope can be obtained.

本论文采用有限元塑性极限分析法对黄土高边坡进行稳定分析，并运用线性规划的方法对稳定问题进行求解，可以得到边坡的稳定安全系数和边坡的应力场及速度场。

The limit on increment of probable error of muzzle velocity has been derived on the basis of that the increment will increase probable error of range and decrease probablity hitting the mark.

基于对初速或然误差增大所引起的射程或然误差增大和命中概率降低的限制，导出了对库存弹药初速或然误差增大的限制。

Firstly, several kinds of schemes were proposed according to the design demand. The best scheme was chosen after analyzing and comparing the schemes. The robot's structure was designed with Pro/Engineer and AutoCAD software. Secondly, the kinematics analysis conducted, coordinate transformation matrix using D-H method was set up, and the kinematics equation direct solution and inverse solution was deduced. The manipulative interface about the kinematics equation direct solution and inverse solution was completed with VC++ and the velocity Jacobian of displacement matrix was constructed using differential transform method. In the process of the trajectory planning based on robot's kinematics analysis, I propone a method by which we can get middle nodal point with normalizing factor in order to simplify our searching for these middle nodal points. In addition, I give these middle nodal points with actual physics signification. For eliminating contradiction between real-time and accuracy, I bring forward separately limit of error and reversal interpolation method. For decreasing calculation quantity, we resort to tri-spline interpolation in the articulation space.We analyse the work range of the robot by resorting to graphic means.

首先，作者针对机器人的设计要求提出了多个方案，对其进行分析比较后，选择其中最优的方案后用Pro/Engineer和AutoCAD软件进行了机器人模型结构设计；其次，进行了运动学分析，用D-H方法建立了坐标变换矩阵，推算了运动方程的正、逆解，运用VC++制作了正、逆运动学求解的求解界面；并且用微分变换法推导了速度雅可比矩阵；在基于机器人的运动学的轨迹规划中，通过在操作空间的规划，提出了归一化因子来求解中间结点，通过它可以使求解中间结点变得更简单，并且赋予这些中间结点实际的物理含义，对于规划中精确性和实时性的矛盾，提出了以误差极限法和反向插值法来解决的方法；为了减少规划过程中计算量，在关节空间进行三次样条插值；然后借助图解法进行工作空间分析，作出了实际工作空间的轴剖图。

As a result of such as business card printing and membership card making head of speed or velocity, fine droplets of spray in mechanical and physical constraints, digital business card printing and membership card making succeesful at certain times or will soon reach the limit

由于诸如制卡和会员卡制作头的转换速度或墨滴的喷射速度等在机械和物理学方面的限制，数码制卡和会员卡制作技术终究在某些时候或很快就会达到极限

However, as the impact velocity reaches up to its limit superior of 6m/s, the aeolian ripple will disappear.

而且当冲击速度大于6.0m/s时，沙波纹变会消失，6.0m/s是沙波纹存在的极限冲击速度。

The results of research show that those parameters could estimate collision velocity or limit its tolerance for motor vehicle.

这个模型为道路交通事故鉴定和再现提供了一个新方法，解决了事故现场某些痕迹容易变动，难以确定它们的准确位置，以及由于汽车工程和道路工程的技术进步，没有汽车制动印迹供事故再现计算碰撞速度使用等实际问题。

And it is concluded that the gradually recovery of shear strength is an important factor of reducing the velocity of the landslides during the sliding process. New slopes stability analysis method in Tongchuan are offered, that is the fuzzy information optimization method, then taking example for Liecai road tollgate landslide, the method is contrast with limit equilibrium method and 2D FEM stability analysis.

同时提出了铜川地区黄土斜坡稳定性分析的新方法和新途径，即模糊信息优化处理法，以铜川焦坪烈柴公路收费站滑坡为例，对提出的方法进行验证，并与极限平衡法和二维弹塑性有限元分析法作了对比。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。