查询词典 quadratic convergence

A third order ENO finite volume method for hyperbolic conservation laws on unstructured triangular mesh is introduced.In order to obtain the third order accuracy on spatial discretization,a weighted quadratic interpolation is constructed on every triangular mesh.Two point Gauss quadrature formula is also used on each edge of every triangular mesh and the third order TVD Runge-Kutta method is used for time discretization.The numerical order of convergence and the numerical result of a mesh 3 wind tunnel with one step are given.

摘 要 基于双曲型守恒律方程，对非结构三角形网格给出了一种ENO(Essentially Nonoscillatory Scheme)型有限体积格式，方法的主要思想是先对每一个三角形单元构造一个加权的二次插值多项式，而在计算交界面的流通量时采用了两点高斯积分公式以保证格式的整体精度，时间离散采用三阶TVD Runge-Kutta方法。

They do not enjoy finite termination on quadratic objectives or rapid local convergence.

它对于二次目标的有限终止或快速局部收敛的条件仍不满意。

Simulating in the IEEE30 bus system, the results show that the global sequential quadratic programming algorithm has favorable convergence and accuracy.

对IEEE30节点系统进行无功优化仿真，结果表明全局SQP算法具有良好的收敛性和精确性。

In order to convert this constraint to smooth ones in general form, an enhancing constraint transcription is adopted, thus the convergence of sequential quadratic programming method is guaranteed.

TCSC暂态10s运行约束可表示为过程不等式约束的形式，为将这一约束条件处理为具有标准形式的光滑约束函数，文中扩展了已有的变换技巧，从而保证了SQP法有较好的收敛性。

The proposed algorithm is convergent to the solution through the solutions of a series of condensation trust region subproblems. It is proved that the method is globally convergent and that the convergence rate is quadratic.

算法通过求解序列压缩信赖域子问题来获得原问题的最优解，并具有全局收敛性和局部二阶收敛速度。

Consistent tangent modulus matrices with consideration of the fully coupled effects are derived to preserve the quadratic rate of convergence of the global Newton iterative procedure.

损伤耦合分析的一致性切线模量矩阵。

This method takes the advantages of fast convergence of CG and not easily to trap the local extreme of SH, which make it can converge to global extreme at a high rate of speed in solving the problems of quadratic function optimization.

这种方法结合了共轭梯度法的快速收敛和随机爬山法的全局收敛的优点，在求解二次函数极值的问题上具有收敛速度快，并能收敛到全局极值的特点。

First of all, on the base of the reduced gradient method of Wolfe, we added accurate one dimension searching method into it and gained a new algorithm (algorithm 1,2) for the nonlinear programming with linear equality constraints and quadratic programming problems, and proved convergence of algorithm, then, we use above algo...

首先本文在Wolfe既约梯度法的基础上，针对具有线性等式约束的非线性规划问题和二次规划问题，引入了精确的一维搜索，得到了带一维搜索的新算法(算法1、2)，并给出了算法的收敛性证明。

To improve the convergence and accuracy in reactive power optimization, this paper proposed a global sequential quadratic programming algorithm to calculate optimum power flow.

为提高无功优化计算的收敛性和精确性，采用全局序列二次规划算法来计算无功优化潮流。

Analysis indicates that the adjacent channel power is a quadratic function of predistorter efficients. A new optimization method is given which uses the predicted ACP surface to obtain fast convergence and simulation results show that a 20dB reduction in the third IMD and a 10dB reduction in the quatic IMD are achievable.

得出结论为：分析表明功放输出的邻信道功率是预失真器系数的二次函数；利用了新的自适应算法即使用预测的ACP曲面以提供更快的收敛速度；仿真结果表明，3阶产物可获得20dB以上的改善，5阶产物可获得10dB以上的改善。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。