数值稳定性

Besides the merits of numerical stability and high reduction accuracy, Block SAPOR is passivity guaranteed and structure preserving.

除了数值稳定性和高降阶精度，Block SAPOR还具有无源保持性和保结构特性。

In this paper, the maximum likelihood algorithm with process and measurement noise for nonlinear continuous-discrete system given by Jategaonkar and Plaetschke is improved in two aspects: 1 to avoid the disadvantages of sensitivities computation by common finite-difference method, in which the perturbation sizes should be selected optionally, an improved finite-difference method with best perturbations, is presented. 2 to improve the numerical stability of Jategaonkar's algorithm, maximum likelihood algorithm with fast triangular square-root decomposition filter is given.

摘要对Jategaonkar等人给出的同时计及过程及观测噪声的非线性连续-离散系统的极大似然算法从两个方面进行了改进：1给出了计算灵敏度的最佳摄动有限差分算法，避免了普通有限差分法计算灵敏度矩阵时需人为选择参数摄动量大小而带来的缺点；2给出了具有快速三角化平方根滤波的极大似然算法，提高了原算法的数值稳定性。

The main problems widely seen in the previous studies are (1) inadequate modeling of initially anisotropically consolidated soil and (2) numerical vulnerability associated with the stress path in the vicinity of the failure line.

以前模型普遍存在的问题有；（1）不能模拟初始偏压固结的情况；（2）当应力路径接近破坏线时数值稳定性差。

In general, a frame is"overcomplete"than a basis, which makes it have numerical stability.

一般地，小波标架比小波基具有&更多&的元素，这使得它用于信号分析时具有数值稳定性。

The numerical tests of IEEE standard example have shown that the proposed method has excellent convergence characteristics and more better robust, successionally analyzed and explained the results of algorithm.

通过对IEEE标准算例进行验证，说明了本方法具有数值稳定性好，收敛速度快，计算时间短的特点，足以满足工程实践的需要，算例分析结果是令人满意的。

Furthermore, the instability problem existed in torques optimization is analyzed, on this basis a method for improving stability is presented.

此外，针对柔性冗余度机器人力矩优化中所遇到的计算不稳定问题，分析了优化算法不稳定的主要原因，并给出了改进数值稳定性的措施。

On one hand, the optimal set membership state estimation algorithm by ellipsoids for linear systems is improved, and two numerically stable suboptimal algorithms are proposed.

一方面，对线性系统最优椭球集员滤波算法进行了改进，给出了两种数值稳定性比较好的次优算法。

The square root non-optimal algorithm can keep the shape-defining matrixes of the ellipsoids positive definite, so it is also numerically stable.

平方根非最优椭球集员滤波算法能使椭球形状矩阵保持正定性，因而它也具有较好的数值稳定性。

In order to improve the numerical stability during the solving of convection-dominated convection-diffusion problems, an upwinding local radial point interpolation method is proposed based on the local radial point interpolation method and the local upwinding weight function.

为提高对流扩散问题中对流项占优时的数值稳定性，采用局部上风式权函数，在局部径向基点插值无网格法基础上构建了上风式局部径向基点插值无网格法。

In order to deal with the numerical stability of convection dominated problems, using the local upwinding weight function, the upwinding local radial point interpolation method is proposed based on the local radial point interpolation method, and were then compared with those numerical results of the LRPIM.

为处理对流扩散问题中对流项占优时的数值稳定性问题，采用局部上风式权函数，在局部径向基点插值无网格法基础上构建了上风式局部径向基点插值无网格法。

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。