1) following photography
随动摄影
1.
This paper built the model of the initial process of following photography for high speed object at short range and worked out acceleration and deceleration time of the mirror by numerical calculation.
文中建立了高速随动摄影系统初始追踪阶段各参量关系的跟踪模型,求出了反射镜的加速及减速时间段,并推算出加速及减速时间的简化计算式,进行了仿真验证,结果表明模型计算和简化计算式的精度均能够满足高速随动摄影的起始段追踪要求,为研制高速随动摄影系统提供了参数设计的方法。
2) random perturbation
随机摄动
1.
The effects of manufacturing error onthe statistic characteristics of the target function are systematically studied in this paper,by theuse of the theory of random perturbation,and an example is given to reveal the application of thisprocess.
本文应用随机摄动理论系统地研究了设计变量的误差对目标函数统计特性的影响。
2.
An improvement method of genetic algorithms——a random perturbation method is proposed in this paper, to avoid losing population variety which leads to fall into a local optimal solution, and to improve its running efficiency and precision of overall optimization searching during evolution calculation.
为避免遗传算法在进化计算过程中失去种群多样性并陷入局部最优解 ,提高其全局优化搜索的运行效率和精度 ,提出一种遗传算法的改进方法——随机摄动算法 。
3.
The first four moments of state function were derived from the random perturbation theory and the Kronecker algebra.
在Paris-Erdogan裂纹扩展模型的基础上,考虑裂纹扩展模型的随机参数影响,采用裂纹长度失效准则建立了旋转机械转轴裂纹扩展的可靠性模型,应用随机摄动理论和Kronecker代数导出了状态函数的前四阶矩,应用应力-强度干涉理论和四阶矩技术确定了转轴裂纹扩展的可靠度,利用矩阵微分理论和灵敏度技术系统地研究了转轴裂纹扩展的可靠性灵敏度问题。
3) Stochastic perturbation
随机摄动
1.
The optimal control and simulation method for systems with stochastic perturbation were investigated in the case that control effort is to be considered under internal model control (IMC) structure.
在内模控制(IMC)结构下对控制能量存在约束时一类随机摄动系统的最优控制及其仿真方法作了探讨。
4) motion photography
运动摄影
6) probabilistic perturbation method
随机摄动法
1.
The probabilistic perturbation method and Edgeworth series technique are employed to present a practical and effective optimization design method for kinematics accuracy reliability of the planar linkage machine with arbitrary distribution parameters under the conditions of given the first four moments of basic random variables.
在已知基本随机参数前四阶矩的情况下,应用随机摄动法和Edgeworth级数方法对平面连杆机构运动精度进行可靠性优化设计,通过计算机程序可以实现随机参数服从任意分布的平面连杆机构的可靠性优化设计,迅速、准确地得到平面连杆机构的结构参数。
补充资料：动体摄影
动体摄影(Moving body photography)，在摩托车比赛或铁道摄影是其典型的例子，相应地需要高速快门或跟拍的技巧。对于近距离拍摄或特写，频闪灯光也是有效的手段。快门速度的确定方法，视被摄物距离，运动的方向，使用镜头的焦距而异。拍摄距离远，若用广角镜头，1/25—1/250秒也可。但是用望远镜头，对着光轴，欲拍摄与其成直角的移动，即使用1/1000秒，也可能有难处，遇到这种情况，采用跟拍的技巧为宜。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条