查询词典 generated subspace

Chapter 8: We discuss the acceleration of multigrid by Krylov subspace approaches, and recognize the reason for slow convergence of algebraic multigrid methods is that error reduction is significantly less efficient for some very specific error components which may cause a few eigenvalues of the algebraic multigrid iteration matrix to be considerably closer to 1 than all the rest. However, the eigenvectors belonging to the few isolated eigenvalues can be expected to be typically captured after only a few conjugate gradient iterations, which accelerate algebraic multigrid algorithms. Theoretical analysis and numerical results of some practical problems show the iterant recombination accelerates algebraic multigrid convergence.

第八章：先介绍用Krylov子空间迭代法加速一般多重网格方法收敛的基本框架，然后紧紧抓住引起代数多重网格方法收敛减慢的根本原因往往是误差减小对几个特别的误差分量不明显，这导致代数多重网格方法的迭代矩阵的几个特征值接近于1，而共轭梯度方法则能比较典型地捕捉属于孤立特征值的特征向量，从而推导出有效的共轭梯度加速算法和程序实现，不仅从一些具体的实际应用例子的数值结果去验证迭代复合加速收敛的效果，而且还从理论上分析了预处理共轭梯度法加速代数多重网格法收敛的机理。

A subspace clustering algorithm for high dimensional spatial data was proposed , which added the affect of neighbored grids when clustering .

为此提出了一种高维空间数据的子空间聚类算法，扩展了相邻聚类空间。

There exits several MDO algorithms. But they are in our opinion either nonefficient or complicated. So we devised an algorithm called Subspace Approximation Optimization . In the SAO algorithm, the whole system is decomposed into one system-level optimization and several disciplinary optimizations so that a large and complicated problem can be divided into several easy-solving sub-problems. The coupling relationships and the coordination among disciplines are presented by equality constraints and these equality constraints are assigned to relevant disciplines. The optimums of design variables in system level optimization are transferred to discipline level optimization. The optimums of design variables in discipline level correspond to the point that is the nearest to the optimums of design variables in system level. If the optimums of design variables in system level are out of feasible region of discipline 1eve1, linear constraints can be built in the system level optimization using the design variable optimums obtained by the discipline level optimization. The system level optimization would improve the design of the whole system with these linear constraints.

目前，国内外已经发展出了多种飞机多学科设计优化算法，本文的重点是针对协同优化算法的不足，提出了子空间近似优化算法(Subspace ApproximatingOptimization，SAO)，SAO算法中，整个系统的优化问题被分解成一个系统级优化和若干学科级优化，而各个学科之间的耦合与权衡关系则被当作等式约束，这些等式约束将被分配到各个学科级优化中去，系统级优化的任务是寻找整个系统的最优解，而学科级优化的目标函数是以系统级优化分配下来的设计点为圆心的超球半径的平方，因此，如果系统级优化分配下来的设计点在学科级优化可行域内，则学科级优化目标函数为0，反之，则学科级优化的最优点是系统级优化当前设计点距离可行域最近的点。

An effective approach based on MTI filtering to eliminating nontransient meteor trails interference is presented using the theory of eigen subspace after analyzing the feature of the meteor trails in detail.

针对流星余迹干扰的特点，利用特征子空间理论，提出了有效消除非瞬态流星余迹干扰MTI滤波的方法。

This paper proposes a subspace-based semiblind channel estimation method in MC-CDMA systems.

摘要该文提出了MC-CDMA系统中一种基于子空间的半盲信道估计方法。

When a local area in a system or a large scale system consists of many fradctionalizing system which are interrelated. synthesizing of the overall ideal solution is a synthetical decision question of multi-objective and multi-stage after the feasible solution subspace of every fractionalizing system has beed resolved.

若某一系统或大系统中的局部区域是多个相互关联的分系统组成时；在求得各分系统可行解子空间后，系统全局理想解的合成就是一个多目标多阶段的综合决策问题。

Firstly, this thesis lucubrates in the method theory of character space and does a lot of experiments and researches in the two steps, character expressing and measure of similarity. Realize the object recognition system based on the character subspace, which adopts the effective and ameliorative means to solve the problems existing in the course of recognition such as illumination and pose estimation, so enhances the robustness of recognition.

首先深入研究特征空间方法原理，并对识别过程中的两个关键步骤：特征表达和相似性度量做了具体实验和研究工作，实现基于特征空间目标识别系统，其中采用了几种有效的改进方法，有效的解决了识别过程中存在的诸如光照以及3D目标姿态估计等问题，提高了识别鲁棒性。

We present a quantum error correction scheme based on quantum cloning. This scheme shows the relationship between quantum cloning and quantum error correction. 4 To avoid decoherence in quantum algorithms, we construct a decoherence-free subspace by using multiple quantum coherences.

该方案一方面说明了量子克隆与量子纠错存在一定程度上的联系，另一方面也反映出一些量子克隆过程本身具有一定的抗消相干的能力。4）提出用二维NMR中的多量子相干实现无消相干子空间，并在实验上验证了该DFS的避错能力。

Simulation results show that one to two decibels benefits can be obtained by subspace and amplitudes tracking.

仿真结果表明，3种子空间幅度跟踪信道估计方法在4×10-3 误码率时可以提高系统误码率性能1～2 dB左右。

A novel process monitoring and fault diagnosis method of turbine generator unit based on feature extraction in kernel Fisher subspace was proposed.

提出了基于核Fisher子空间特征提取的汽轮发电机组过程监控和故障诊断新方法。

What was it that made you want to change sider ?

是什么使你临阵倒戈？

I don't know what he wants, but let's play along with him.

我不知道他要干什么，可我