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Table of Content

    20 September 2011, Volume 15 Issue 3
    Original Articles
    Efficiency for a Class of Multiobjective Optimization Problems
    Ke-Quan Zhao
    2011, (3):  1-8. 
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    In this paper, a class of multiobjective optimization problems in which involved inequality constraints is considered. Some necessary and sufficient conditions are established for an efficient solution. Moreover, the equivalence is established between efficiency and properly efficiency by linear scalarization method under some suitable conditions. Our results improves naturally and extends some previously known results.
    Efficiency for a Class of Multiobjective Optimization Problems
    ZHAO Ke-Quan, Yang Xin-Min
    2011, 15(3):  1-8. 
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    In this paper, a class of multiobjective optimization problems in which involved inequality constraints is considered. Some necessary and sufficient conditions are established for an efficient solution. Moreover, the equivalence is established between efficiency and properly efficiency by linear scalarization method under some suitable conditions. Our results improves naturally and extends some previously known results.
    A class of limited memory BFGS-type algorithms for large-scale unconstrainedoptimization
    QIAN Xiao-Yan, SHI Qing-Sheng, LIU Hao, SHI Kui-Ran
    2011, (3):  9-18. 
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    In this paper, objective function value information is exploited in limited memory BFGS-type algorithms. we first construct a new quadratic function satisfying some interpolation conditions to approximate the objective function, get a new weak secant equation. Combining the new weak secant equation and that obtained by Yuan\cite{yuan1991}, a class of limited memory BFGS--type algorithms including the classic LBFGS algorithm based on a new weak secant equation are proposed. The convergence of this class limited memory BFGS-type algorithms is proved. Numerical results for standard test problems from CUTE are reported, which indicate that all the algorithms in the proposed class perform quiet well.
    A class of limited memory BFGS-type algorithms for large-scale unconstrainedoptimization
    QIAN Xiao-Yan, SHI Qing-Sheng, LIU Hao, SHI Kui-Ran
    2011, 15(3):  9-18. 
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    In this paper, objective function value information is exploited in limited memory BFGS-type algorithms. we first construct a new quadratic function satisfying some interpolation conditions to approximate the objective function, get a new weak secant equation. Combining the new weak secant equation and that obtained by Yuan\cite{yuan1991}, a class of limited memory BFGS--type algorithms including the classic LBFGS algorithm based on a new weak secant equation are proposed. The convergence of this class limited memory BFGS-type algorithms is proved. Numerical results for standard test problems from CUTE are reported, which indicate that all the algorithms in the proposed class perform quiet well.
    The Q-spectral radii of connected graphs with given number of vertices and edges
    CHEN Lin, HUANG Qiong-Xiang
    2011, (3):  19-28. 
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    The signless Laplacian matrix of a graph is defined to be the sum of its adjacency matrix and degree diagonal matrix, and its eigenvalues are denoted by $q_1\geq q_2\geq,\cdots ,\geq q_n$. Let $\mathscr{C}(n,m)$ be a set of connected graphs in which every graph has $n$ vertices and $m$ edges, where $1\leq n-1\leq\ m \leq\bigl(\begin{smallmatrix}n\\2\end{smallmatrix}\bigr)$. A graph $G^\star \in \mathscr{C}(n,m)$ is called maximum if $\ q_1(G^\star )\geq q_1(G)$ for any $G\in \mathscr{C}(n,m)$. In this paper, we proved that for any given positive integer $a=m-n+1$, $n-\frac{1}{2}+a+\frac{1}{2}\sqrt{1+12a+12a^2}$, which leads to $q_1(G)-\frac{1}{2}+a+\frac{1}{2}\sqrt{1+12a+12a^2}$.
    The Q-spectral radii of connected graphs with given number of vertices and edges
    CHEN Lin- Huang-Qiong-Xiang
    2011, 15(3):  19-28. 
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    The signless Laplacian matrix of a graph is defined to be the sum of its adjacency matrix and degree diagonal matrix, and its eigenvalues are denoted by $q_1\geq q_2\geq,\cdots ,\geq q_n$. Let $\mathscr{C}(n,m)$ be a set of connected graphs in which every graph has $n$ vertices and $m$ edges, where $1\leq n-1\leq\ m \leq\bigl(\begin{smallmatrix}n\\2\end{smallmatrix}\bigr)$. A graph $G^\star \in \mathscr{C}(n,m)$ is called maximum if $\ q_1(G^\star )\geq q_1(G)$ for any $G\in \mathscr{C}(n,m)$. In this paper, we proved that for any given positive integer $a=m-n+1$, $n-\frac{1}{2}+a+\frac{1}{2}\sqrt{1+12a+12a^2}$, which leads to $q_1(G)-\frac{1}{2}+a+\frac{1}{2}\sqrt{1+12a+12a^2}$.
    List (d,1)-Total Labelling of Graphs Embedded in Surfaces
    YU Yong, ZHANG Xin, LIU Gui-Zhen
    2011, (3):  29-37. 
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    The ($d$,1)-total labelling of graphs was introduced by Havet and
    Yu. In this paper, we consider the list version of ($d$,1)-total
    labelling of graphs. Let $G$ be a graph embedded in a surface with
    Euler characteristic $\varepsilon$ whose maximum degree $\Delta(G)$
    is sufficiently large. We prove that the list ($d$,1)-total labelling number
    $Ch_{d,1}^{\rm T}(G)$ of $G$ is at most $\Delta(G)+2d$.
     List (d,1)-Total Labelling of Graphs Embedded in Surfaces
    YU Yong, ZHANG Xin, LIU Gui-Zhen
    2011, 15(3):  29-37. 
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    The ($d$,1)-total labelling of graphs was introduced by Havet and
    Yu. In this paper, we consider the list version of ($d$,1)-total
    labelling of graphs. Let $G$ be a graph embedded in a surface with
    Euler characteristic $\varepsilon$ whose maximum degree $\Delta(G)$
    is sufficiently large. We prove that the list ($d$,1)-total labelling number
    $Ch_{d,1}^{\rm T}(G)$ of $G$ is at most $\Delta(G)+2d$.
    On the Linear Arboricity of 1-Planar Graphs
    ZHANG Xin, LIU Gui-Zhen, WU Jian-Liang
    2011, 15(3):  38-44. 
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    It is proved that the linear arboricity of every 1-planar graph with maximum
    degree $\Delta\geq 33$ is $\lceil\Delta/2\rceil$.
    On the Spectral Radii of m-Starlike Tree
    WU Ting-Zeng, HU Sheng-Biao
    2011, 15(3):  45-50. 
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    A tree is said to be starlike if exactly one of
    its vertices has degree larger than 2.  A
     m-starlike tree is obtained by appending a starlike tree to every
    one  terminus of  a starlike tree $S_{0}=S(m_{01}, m_{02}, ...
    ,m_{0\Delta_{0}})$. Gutman and L. Shi give a
     bound of the spectral radii  of starlike tree. In this
    paper, we give an another  short proof and further discussions about
    this result. Sometime, we give a new upper bound of the spectral
    radii of m-starlike tree.
    Properly Colored Paths and Cycles in Complete Graphs
    WANG Guang-Hui, ZHOU Shan
    2011, 15(3):  51-56. 
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    Let $K_{n}^{c}$ denote a complete graph on $n$ vertices whose edges are
    colored in an arbitrary way. Let $\Delta^{mon}
    (K_{n}^{c})$ denote the maximum number of edges of the same color incident with a vertex of $K^c_{n}$. A properly colored cycle (path) in $K_{n}^{c}$ is a
    cycle (path) in which adjacent edges have distinct colors. B. Bollob\'{a}s and P. Erd\"{o}s (1976) proposed the following conjecture: If $\Delta^{{mon}}
    (K_{n}^{c})<\lfloor \frac{n}{2} \rfloor$, then $K_{n}^{c}$ contains a properly colored
    Hamiltonian cycle. This conjecture is still open. In this paper, we study properly colored paths and cycles under the condition mentioned in the above conjecture.  
    The Number of Arcs of Strongly Connected Oriented Graphs with Two Noncritical Vertices
    LIN Shang-Wei, LI Chun-Fang, WANG Shi-Ying
    2011, 15(3):  57-61. 
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    It is proved that a strongly
     connected oriented graph $D$ with $n\geq 4$ vertices and  at least ${n-1 \choose 2}+3$
     arcs has two distinct vertices $u^*, v^*$ such that both $D-u^*$ and $D-v^*$ are strongly connected. The examples
    show that the above lower bound on the number of arcs is sharp.
    Two-Machine Flow Shop Problems with Availability Constraints
    YANG Ming, LU Xi-Wen
    2011, 15(3):  62-69. 
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    We investigate the problems for two-machine flow shop scheduling with availability constraints. A resumable scenario is assumed, i.e., if a job cannot be finished before the interval it is continued after the machine becomes available again. The objective is to minimize the makespan. We first consider an approximate case of the problem with several availability constraints on both machines, present an algorithm with performance ratio of 3/2. Then we give an algorithm with competitive ratio of 3/2 for the semi-online problem with an availability constraint on the second machine.
    Statistical Learning Element of Support Vector Ordinal Regression Machine
    YANG Hong-Ying, YANG Zhi-Xia
    2011, 15(3):  70-80. 
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    For support vector ordinal regression machine, its statistical learning element is studied in this paper.
    Using structural risk minimization principle, we reduce one of
    ordinal regression machine, which is called structural risk
    minimization ordinal regression machine. Furthermore, the relation
    of solution between structural risk minimization ordinal regression
    machine and support vector ordinal regression machine is proved.
    From the statistical point of view, support vector ordinal
    regression machine is a direct implementation of structural risk
    minimization principle.
    Supply Chain Scheduling with Multiple Transportation Modes
    WANG Lei, WANG Guo-Qing, YI Yu-Yin
    2011, 15(3):  81-94. 
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    We consider a make-to-order production-distribution system with one manufacturer and multiple customers. A set of orders with deadlines needs to be processed by the manufacturer and delivered to the customers upon completion. The manufacturer adopts a commit-to-delivery business mode. The problem is to find a joint schedule of order processing at the manufacturer and order delivery from the manufacturer to the customers that minimize the total distribution cost with deadline constraint. We study the solvability of multiple cases of the problem by providing efficient algorithms.
    The crossing Number of Petersen graph P(4,1) with paths Pn
    YUAN Zi-Han- Huang-Yuan-Qiu
    2011, 15(3):  95-106. 
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    The crossing Number of Petersen graph $P(m,1)$ with paths $P_n$ is NP-complete problem, Y.H. Peng and Y.C.Yiew have determined the crossing Number of $P(3,1)$ with paths $P_n$ is $4n$, we have proved the crossing Number of $P(4,1)$ with paths $P_n$ is $8n$.
    Online Batch Scheduling with Linear Deterioration Effect
    WANG Cheng-Fei, ZHANG Yu-Zhong, MIAO Cui-Xia, BAI Qing-Guo
    2011, 15(3):  107-114. 
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    An online batch scheduling with linear deterioration effect on single machine is considered. Jobs arrive over time. A batch processing machine can handle up to $B$ jobs simultaneously. The actual processing time $p_j$ of Job $J_j$ is assumed to be a linear function of its starting time $t$, i.e., $p_j=b_j+\alpha t$, where $\alpha >0$ is the deterioration ratio, $b_j$ is the basic processing time, which is unknown until it arrives. The processing time of a batch is given by the longest processing time of any job in the batch. For single machine with unbounded capacity to minimize makespan problem, we give an optimal online algorithm, which competitive ratio matches the lower bound of the problem.
    A vector graph model for interconnection networks
    SHI Hai-Zhong, NIU Pan-Feng, MA Ji-Yong, HOU Fei-Fei
    2011, 15(3):  115-123. 
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    the n-cube, the ring network, the k-ary-n-cube, the star network, the pancake network, the bubble sort network, the Cayley graph of transposition tree, the De Bruijn network, the Kautz network, the consecutive-d digraph, the ILLIAC network, the circulant digraph, the circulant undirected graph, the ring digraph, etc have been widely used as processor/communication networks. The performance of such networks is often measured through an analysis of their degree, diameter, connectivity, fault tolerance, routing algorithm, etc. In this paper, at first, we proposed the concepts --- vector digraph and vector graph. Second, we developed vector digraph model and vector graph model for interconnection networks for designing, analyzing, and improving above networks. Furthermore, we shew that the networkd mentioned above can be concisely represented in the two models. More importantly, we shew that the two models enabled us to design new networks --- double star network and triangle network based on vector graphs.
    Reverse Point Algorithm of Assignment Problem on Assignment Less Than Jobs and Persons
    WANG Li-Zhu, LIU Yang
    2011, 15(3):  124-128. 
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    Abstract:In this paper, we propose a new algorithm on a special assignment problem in which the real assigned jobs are less than or equal to both the total persons and the total jobs. To this special assingment problem we pose the concept of reserve point, discussed the character of reserve point and accessed to relevant conclusion.a new method to solve this special assignment problem is given through increasing reserve points finally.