迭代计算

We have researched a method of coordinate rotation of 3D converted wave data, binning and calculating 3D converted point, that is to make coordinate rotation for all seismic traces in each gather of converted wave common-shot point.

研究了三维转换波资料坐标旋转、面元划分及三维共转换点计算方法，即将每一个转换波共炮点道集内所有地震道进行坐标旋转，旋转后的转换波道集在炮检距、纵横波速度已知的条件下，用迭代方法计算三维转换点的平面坐标，并绘制在平面上。

Construction Control of Extradosed Cable-stayed Bridge;2. The main bridge of the Kaifeng Yellow River 2nd bridge of Daguang freeway is 7-tower and 8-span prestressed concrete extradosed cable-stayed bridge .

以大广线开封黄河二桥主桥——7塔8跨预应力混凝土矮塔斜拉桥为研究对象，借助MIDAS/Civil有限元程序建立了该桥梁空间有限元计算模型，采用子空间迭代法计算了桥梁的动力特性。

The numerical method for probability response spectrum of structures was studied, and an iterative formular based on the two states Markovian assumption was presented.

研究了结构平稳响应概率反应谱的计算方法，并给出基于两态Markovian假定下计算结构响应概率反应谱的迭代公式。

By Sketchy Method Alternately rate constant of oil and fat hydrogenation reaction was calculated,and furthermore Selectivity Ratio of linoleate and linolenate was calculated respectively in the paper.

提出迭代作图法，用以计算油脂氢化反应速率常数，进而计算三烯酸、二烯酸的选择性比。

Then a BGPEOpt(BGP Egress Optimization Algorithm) algorithm is proposed to reduce the execution time of the typical algorithm by leveraging the .characteristics of cut link in the topology graph to reduce the frequency of recomputing traffic demand. Further more, mediate results are used in the iterative process to reduce the time of computing the IGP shortest distances from a source node to other nodes. Experimental results indicate that the running time of BGPEOpt reduced 7%~30% with the similar link utilization comparing to that of typical algorithms.

在此基础上，提出了静态阶段的BGP出口选择优化算法BGPEOpt(BGP Egress Optimization Algorithm)，BGPEOpt算法利用网络拓扑结构中割边的特殊性，减少流量矩阵重新计算的频率；同时利用算法在迭代过程中的中间结果，减少重新计算从一个源节点到其它节点最短路径的时间，从而提高了算法的时间性能。

It is considered that there are four contributions to the nonspecular scattering field from each interface, the scattered power is not simply estimated as the sum of the nonspecular scattering from each interface, it is treated by dynamical diffraction method through multiplying a transmission factor before adding the scattering amplitude, the transmission factor is calculated by the recursive method.

每个界面考虑有四支散射波的贡献，计算总的散射强度时，没有简单的将各界面散射振幅相干叠加，而是用动力学处理方法将每只散射波乘上一个出射因子再叠加，出射因子是由动力学中的迭代方法计算的。

5Study on vehicle-bridge coupled vibration program of multi-beams bridgeThe vehicle-bridge coupled vibration equation is detruded on the base of three axisvehicle,and the vehicle-bridge coupled vibration program is established with iteration method,which is used for analyzing the dynamic response of the assembly slab bridge.

5板桥车-桥耦合振动程序研究以三轴车辆为例建立车-桥耦合振动方程，采用分离迭代法，编制了板桥车-桥耦合振动程序，并以实例验证了其计算结果的正确性，为装配式板桥动力响应分析提供计算平台。

To investigate the detecting capability of GPR in the dispersive medium, we propose a Finite Difference Time Domain method to solve Maxwells equations. We give an iterative method for calculation of the electrical displacement and magnetic fields in the Debye medium, and a method to compute the electric field from electrical displacement.

为了研究地质雷达在频散介质中的探测能力，提出了频散介质中时间域有限差分法计算麦克斯韦方程的方法，给出了满足Debye关系的频散介质中的电位移和磁场的迭代算法，以及由电位移计算电场的算法。

In Chapter 4, the Thwaites＇s method for 2-D laminar boundary layer and the Truckenbrodt＇s method for 2-D turbulent boundary layer are developed to solve the"quasi-3-D"equations for the 3-D boundary layers on rotating helical blades, and a integral method, which can be solved by iteration, is resulted.

在第4章中，计算二维层流边界层的Thwaites方法和计算二维湍流边界层的Truckenbrodt方法被推广用以解关于旋转螺旋面上三维边界层的&准三维&方程，得到一种可迭代求解的积分方法。

Dijkstra algorithm and matrix iterative algorithm are important algorithms of the shortest route problem.In order to find which of the two algorithms is more efficient,the two algorithms were discussed,and their program flows were introduced.

Dijkstra算法和矩阵迭代算法都是最短路径问题的经典算法，为了研究这2种算法的计算效率，介绍了2种算法的基本思路和程序流程；通过对时间复杂度、结果和时间的关系指标进行多次计算，表现2者之间的效率差异。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。