检索结果-南通市图书馆

Global convergence property of s-dependent GFR conjugate gradient method

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1998年第23期43卷 1959-1965页

作者： wang Changyu 1.2 and ZHANG Yuzhong\+1.1. {1. of operations research in qufu normal university, qufu 2.3.65, china 2. {1. of Applied Mathematics, Chinese Academy of Sciences, Beijing 1.0080, china institute of {1. research Qufu Normal University Qufu China institute of Applied Mathematics Chinese Academy of Sciences Beijing China

An \%S\%_dependent GFR method and a generalized conjugate gradient method are designed. Two estimated values of upper bounds for the ratio of β k to β FR k are given. The two convergence theorems are proved. The global convergent properties of \%s\%_dependent GFR method are obtained adopting several choice strategies of steplength and some results in recent literature are extended.

关键词： steplength linear search global convergence conjugate gradient.

Cohomology of a class of Kadison-Singer algebras

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2010年第7期53卷 1824-1836页

作者： HOU ChengJun institute of {1. research, qufu normal university, Rizhao 276826, china 1. institute of {1. research Qufu Normal University Rizhao 276826 China

Let L be the complete lattice generated by a nest N on an infinite-dimensional separable Hilbert space H and a rank one projection P ξ given by a vector ξ in H. Assume that ξ is a separating vector for N , the core of the nest algebra Alg(N ). We show that L is a Kadison-Singer lattice, and hence the corresponding algebra Alg(L) is a Kadison-Singer algebra. We also describe the center of Alg(L) and its commutator modulo itself, and show that every bounded derivation from Alg(L) into itself is inner, and all n-th bounded cohomology groups H n (Alg(L), B(H)) of Alg(L) with coefficients in B(H) are trivial for all n≥1.

关键词： Kadison-Singer algebra Kadison-Singer lattice nest algebra cohomology group

Global Convergence Property of Conjugate Gradient Methods for Optimization

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1999年第3期9卷 277-282页

作者： LIAN Shu\|jun institute of {1. research, qufu normal university, qufu 2.3.65, china

In this paper, we give a new line search. With the line search, we prove the global convergence of the Hestenes\|Stiefel method.

关键词： conjugate gradient method global convergence

Star-Chromatic Numbers of Planar Graphs

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1998年第2期8卷 63-66页

作者： wang Yijiu {1. of operations research,qufu normal university,2.3.65

The concept of the star chromatic number of a graph was introduced by *** in ,which is a natural generalizition of the chromatic number of a *** this paper,we investigate the star chromatic number of a family of planar *** precisely, a family of planar graphs whose star chromatic numbers are between 2 and 3 are disscused,which answers the open problem posed by Vince in .

关键词： star chromatic number planar graph cycle star graph

The Priority Problem of the Cumulative Preponderance and the Maximum Covariance

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 2000年第2期10卷 201-205页

作者： LI Ji\|qian,\ WEI Chui\|ping institute of {1. research qufu normal university, qufu 2.3.65,china

This paper gives a new priority method of AHP by using the maximum covariance and cumulative preponderance, and also proves the beautiful properties of this method.

关键词： AHP maximum convariance cumulative preponderance priority problem

AN ALGORITHM FOR CONTINUOUS TYPE OPTIMAL SPHERICAL FACILITY LOCATION PROBLEM

在线全文

学校读者我要写书评

暂无评论

Systems Science and Mathematical Sciences 1999年第3期12卷 210-215页

作者： ZHANG Liping(institute of Applied Mathematics, Academia Sinica, Beijing 1.0080,{1.)wang Changyu(institute of operations research, qufu normal university, qufu 2.3.65,{1.) 中科院应用数学所北京 100080 曲阜师范大学运筹学所山东曲阜 273165

In this paper, we study the continuously spherical facility location problem.(P) min f(X) = We prove a hull property and optimality condition of the problem (P), and propose analgorithm to solve (P). Global convergenc... 详细信息

关键词： Continuously spherical facility location convergent algorithm hull property optimal condition

A Modified Heuristic for Premptive Parallel Machine Scheduling with Batch Set-up Times

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1997年第3期7卷 102-106页

作者： ZHANG Yuzhong MA Kejie institute of {1. research qufu normal university, qufu 2.3.65

A new heuristic for preemptive parallel machine scheduling with batch set up time is provided by modifying some recent algorithms, we prove that it has a better asymptotic performance in some sence.

关键词： heuristic set up asymptotic performance

ON-LINE SCHEDULING WITH REJECTION ON IDENTICAL PARALLEL MACHINES

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2006年第3期19卷 431-435页

作者： Cuixia MIAO Yuzhong ZHANG Department of Mathematics Qufu Normal University Qufu 273165 China. institute of {1. research Qufu Normal University Rizhao 276826 China.

In this paper, we consider the on-line scheduling of unit time jobs with rejection on rn identical parallel machines. The objective is to minimize the total completion time of the accepted jobs plus the total penalty of the rejected jobs. We give an on-line algorithm for the problem with competitive ratio 1.2 （2 ＋√3） ≈ 1.86602.

关键词： Competitive ratio identical parallel machines on-line algorithm rejection penalty.

A Stronger Uniform Consistency Check and Adjustment Method

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 2002年第4期11卷 494-497页

作者： LI Ji-qianinstitute of {1. research, qufu normal university, 2.3.65, china institute of {1. research Qufu Normal University 273165 China

When vectors of a judgement matrix is arranged according to their weight in AHP, uniform consistency is always required and the check criterion is uniform check. In this paper, a stronger uniform consistency check is introduced which can obtain a exact and practical effect by making an adjust to any non-satisfying uniforming matrix.

关键词： AHP adjustment method uniform consistency check