迭代计算

It is a measurement method following the diffraction and interference theory of the point light source. The phase message of interference pattern was obtained by the Fourier transform pattern analysis method. And the xyz-coordinates of the two point diffraction sources were calculated by the modified Newton method based on the Broyden-Fletcher-Goldfarb-Shanno algorithm.

基于傅里叶变换的点衍射干涉测量术是一种建立在点光源衍射干涉理论基础上的测量方法，它采用傅里叶条纹分析方法来求解干涉条纹的相位分布，运用基于BFGS的拟牛顿算法进行三坐标的迭代计算，确定点光源的三维空间坐标。

Aiming at the nonlinear optimization problems with inequality restriction ,we analyzed why the convergence speed of the traditional complex shape arithmetic was slow.

针对不等式约束非线性最优化问题，分析了传统复合形算法收敛速度慢的原因，提出了一种称为复合形旋转方向搜索的新算法，给出了算法的迭代计算流程和程序框图。

Serial compensation strategy is also used to avoid the decrease of thecoefficient matrix rank during the computation of the proposed method.

顺序补偿策略被用在新方法中以避免迭代计算过程中关联矩阵降秩而发生奇异。

In the adaptive area, an acceleration/deceleration and jerk limited S curve is used to replan the feedrate, to get smooth feedrate profile.

算法采用2阶Taylor展开式进行下一插补点的迭代计算，根据插补精度要求自适应调整进给速度，并在调整过程中采用加速度与加加速度约束的S型加减速曲线对进给速度重新规划，得到平滑的速度过渡曲线。

Interpolating trigonometric polynomial parametric curves with C~2 (or G~1) continuity can be automatically generated without having to solve any system of equations or do any iterative computation. Then, the convexity of the constructed curves can be guaranteed by the appropriate value of the shape parameter.

在无需反求方程组、迭代计算和最值求解的前提下，即可产生插值给定点列的C~2或G~1连续的一族三角多项式样条曲线；进一步研究了该类曲线的保凸性，得到插值曲线保凸时形状参数的取值范围。

The aseismic control for pile-foundation bridges considering soil-structure-interaction was studied. There are two problems were solved:(1) The coefficient matrix is singularity because the elements of rotational degree in mass matrix equal to zero due to the flexiblity of the pier.(2) The iteration of control gain was not convergent because the dumped mass of the beam is very large comparing with that of the pier.

为将Smith[162]方法用于桥梁结构，本文解决了如下两个问题：(1)以弯曲变形为主的桥梁结构，其质量矩阵中相应于转动自由度的元素数值为零，由此导致等效固基模型中的系数矩阵奇异；(2)桥梁结构堆聚到顶部节点的梁体质量很大，由于质量分布不均匀导致控制增益的迭代计算不收敛。

The coaction of grouting and drainage curtains will lead to biggish gradient variation of seepage flow nearby, and slow down the convergence rate of unconfined seepage flow iteration, or even cause it divergent.

防渗帷幕和排水孔幕的共同作用可能会引起附近渗流场较大的梯度变化，并导致无压渗流迭代计算过程收敛速度慢甚至不收敛。

Aimed at 9-degree of freedom hyper-redundant module robot in intra-vehicular robot system, attention is given to the avoiding joint limits as an optimal mark. Two different iterative algorithms considering fault-tolerance for trajectory planning of redundant robot in Cartesian space are then proposed by using the method of differential locomotion. The first algorithm is for linear-path in which the pose of manipulator can be changed, the second is for circular-path in the plane decided by three noncollinear arbitrary points in the space. Experiments on the specimen robot platform are performed to validate the above algorithms.

以太空舱内机器人系统9-自由度超冗余模块机器人为研究对象，以避关节极限作为优化指标，考虑容错性能，利用微分运动的方法，分别提出了适于计算机迭代计算的冗余机器人在笛卡儿空间进行手爪姿态可变时的直线轨迹优化算法和手爪经过空间中任意不共线3点决定的平面内的圆弧轨迹优化算法。

This paper proposes an off-line iterative algorithm based on signal reconstruction technique for generation of nonsinusoidal three-phase PWM waveforms.

在三相PWM逆变器中注入零序谐波电压分量是提高逆变器直流侧电压利用率的一种有效方法，提出一种基于波形重构技术的迭代计算方法，用以产生三相鞍形PWM波形数据。

Computation results show that, for the uncracked pavements, low-temperature contracted cracking is not occurred generally, but the temperature-fatigue cracking is able to occur in pavement because of cyclical temperature varying.

在此基础上，对路面温度应力以24小时为周期的变化特征进行了系统的分析，发现了初始应力对周期性变化的路面温度应力场的影响，并提出了采用多周期迭代计算解决这一问题的有效途径。

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。