查询词典 iterative

Based on Fermat's principle, the paper uses full-path iterative algorithm to realize 3-D VSP two-point ray tracing in volume element model.

本文基于费马原理，利用全路径迭代算法实现体元模型中的三维VSP两点射线追踪。

In this paper, two-point ray tracing is studied for three-dimensional arbitrary interface. from Fermat's principle, traveltime is expanded in the initial ray path according to one order Taylor's incompletion expansion. Then, the algorithm of total iterative ray tracing in three dimension is derived.

作者在文中对三维任意界面情况下的两点间射线追踪问题进行了研究，从Fermat原理出发，对射线路径上的旅行时，采用一阶Taylor不完全展开等办法，推出了三维情况下计算射线路径的整体迭代算法。

Compared with the qp function in Optimization toolbox in Matlab software, the iterative method has good efficiency.

与Matlab软件优化工具箱中的qp函数比较，迭代法有明显的效果。

The position equations are non-linear and they are very difficult to be solved. Scholar Haworth, et al. presented an iterative algorithm.

学者Haworth等人(1995，1997)提出了利用迭代的算法求解；然而该文的实验结果表明Haworth等人的迭代算法是发散的。

However, the position results by using their iterative algorithm were non-convergent in the experiment. The formulas given by scholar Haworth, et al. are deduced carefully in this paper and some faults of their itera...

该文通过详细的推导，指出了Haworth等人迭代算法的失误，修改了Haworth等人的迭代算法，并通过实验验证了修改后的迭代算法的正确性。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。