数值稳定性

To get high numerical stability and computational efficiency, U-D factorization-based DFP and BFGS algorithms are developed.

该算法解决了H阵的正定性问题，保证了算法的数值稳定性，并大大提高了计算效率。

Reduce the computing complexity of magnetic field integral equation with differential quotient, which makes the computing which combined field integral equation more efficiently.

在AIM算法的实现技术方面作了两个改进：一是采用了新的多极子展开方案，保证了迭代的数值稳定性；二是在差商逼近偏导数的过程中全部采用二阶形式，保证了差商逼近偏导数的精度。

The integrated GPS/INS position, velocity, pesudorange and pesudorange rate hare been simulated respectively. U-D discompose algorithm is used to Kalman filter.

分别进行了GPS/INS位置、速度组合和伪距、伪距率组合仿真，仿真中组合Kalman滤波器采用数值稳定性较好的U-D分解算法。

Thus, the -general structure topology optimization problem can be regarded as a material interface tracing problem.

其次在结构拓扑优化中还引入了黎曼测度下的平均曲率流正则化技术，以保证计算结果材料界面的光顺性，并有助于提高拓扑演化过程中的数值稳定性。

In the two-dimensional simulation, the fully implicit difference scheme is used for the continuity equations to ensure numerical stability; Jacobian iteration is used to solve the difference equations, and only nonzero elements in the coefficient matrixes of these equations are dealt with, which reduce the requirement for memory and shorten the calculation time.

在两维模拟计算中，对连续性方程采用全隐式差分方案以保证数值稳定性；运用雅可比迭代法求解差分方程组，并且在求解过程中，只对差分方程组系数矩阵中的非零元素进行处理，因此减少了对内存的需求量，而且缩短了计算时间。

This paper presents the investigation of numerical stability and error estimate of SFBEM in elastic plane problems. Several conclusions regarding the above issues are obtained in this paper, which lays a solid foundation for its practical application.

本文主要针对弹性力学平面问题样条虚边界元法在数值稳定性与误差估计方面的问题展开讨论，获得了虚边界的布设规律及方法误差的直观度量，为该法的实际应用打下了更好的基础。

The calculating results show that the methods have high efficiency and numerical stability in both time and frequency domain

计算结果表明两种分析方法都具有较高的计算效率和数值稳定性。

Practice and the example presented show that it is one of the most successful solution methods, having better numerical stability.

实践与算例表明，拟牛顿法是目前最成功的算法之一，具有较好的数值稳定性。

Numerical results show that the higher accuracy can be obtained with fine numerical stability by use of the formulations.

这两种无条件稳定的计算格式除可用来获得具有较高精度的结果外，还具有良好的数值稳定性。

Their construction, convergence and numerical stability are discussed.

文章讨论了这类组合方法的构造、收敛性和数值稳定性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。