数值计算

In this paper, based on the flexible multibody dynamics model of the virtual axis hybrid polishing machine tool, the differential — algebra hybrid equations is calculated by the Newton- Raphson method. The variety of the moving displacement, the velocity and the acceleration for the moving platform, leg, slider on the 3- PTT parallel mechanism and the pose curve of the series mechanism are obtained.

论文主要完成了在已经建立的虚拟轴混联研抛机床多柔体动力学模型基础上，应用牛顿—拉斐逊（Newton-Raphson）数值计算方法求解微分—代数混合方程组，得到3-PTT并联机构动平台、支杆、滑鞍各部件的运动轨迹、速度和加速度变化规律，以及串联机构的姿态变化曲线。

RBF network-based ball mill expert system theory and basic structure are discussed, and the author proposes its knowledge representation, knowledge acquisition, self-adapting training and parallel inference rule.

在Matlab环境下，充分利用Matlab强大的数值计算功能实现了球磨机神经网络专家系统开放式和模块式编程，建立了RBF网络和BP网络各种不同条件的训练程序库、神经网络推理程序库、神经网络权值和阈值库等各类知识库和数据库，用户通过特别设计窗口进行咨询。

It is showed that the parametric optimal design method is feasible and effective by calculative results.

数值计算的结果显示本文提出的参数优化方法是可行的、有效的。

The movement patten of particle group is calculated by using chaotic analyze method and the movement property of particle group is describe.

应用混沌分析方法对物料在强化筛中的运动规律进行了数值计算，并用其描述了颗粒的运动特性。

Both the material nonlinearity and geometrical nonlinearity effects were taken into account in the FEM model. The rigid effect of tank pedrail and the panel's initial welded residual deformation were also considered.

数值计算中考虑了材料非线性和几何非线性效应，并在有限元模型中考虑了坦克履带的刚化作用和初始焊接变形的影响。

Numerical results for perfectly conduction and homogeneous penetrable circular cylinder are presented and compared with the solutions by using second-order differential operator B2 type absorbing boundary condition.

本文使用这种边界条件对理想导电及均匀电磁可穿透材料圆柱散射体的表面场进行了数值计算，并与使用二阶微分算子B_2型的吸收边界条件的结果作了比较。

The theory of active absorption using perforated plate is proposed in this dissertation.

通过数值计算，揭示了不同组合方式吸声结构与吸声系数的关系。

This paper considers the problem of numerically computing the almost periodic solution of the Lotka-Volterra system.

刘颖研究了Lotka-Volterra系统概周期解的数值计算方法。

From our results we know that the average error of the Lagrange interpolation sequence and the Hermite interpolation sequence based on the Chebyshev nodes in the 1-fold integrated Wiener space equal weakly to the average error of their corresponding optimal approximation polynomial in the 1-fold integrated Wiener space,and as a kind of information-based operation,they have simple form and their recover functions are polynomials,in the 1-fold integrated wiener space,their average error equal weakly to the corresponding minimal information radius whose permissible information operators class is function values.

通过我们的结果可以知道，基于第一类Chebyshev多项式零点的Lagrange插值算子列和Hermite插值算子列在1-重积分Wiener空间下的平均误差弱等价于相应的最佳逼近多项式在1-重积分Wiener空间下的平均误差，并且作为形式简单且恢复函数为多项式的一种信息基算法，其在1-重积分Wiener空间下的平均误差弱等价于相应的以函数值计算为可允许信息算子的最小平均信息半径。

In this chapter, we show that Perron complements of N_0~2-matrices are N_0~2-matrices. We also demonstrate the Perron complements of inverse N_0~1-matrices are inverse N_0~1-matrices with certain restriction.

第四章研究非严格广义双对角占优矩阵的Schur余的性质，对角占优矩阵是数值计算中经常遇到的一类矩阵，它的Schur余可应用于迭代法的构造。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。