共查询到20条相似文献,搜索用时 109 毫秒
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文军 《数学的实践与认识》2010,40(19)
航空公司战略联盟成功的关键是能否选择出理想的合作伙伴,这是一个复杂的决策问题.提出了一个比较新颖的算法.首先根据AHP方法确定模糊评价矩阵和权重向量,并针对航空联盟的敏捷性要求和特定的市场需求,提出了评价指标两两间的比较标度的修正方法,然后通过模糊运算对目标函数进行排序,实现对合作伙伴的最优选择.最后以实例表明本算法能有效的支持伙伴选择. 相似文献
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团队成员选择的模型及算法 总被引:6,自引:1,他引:5
本针对组织中组建团队或重组现有团队时的成员选择问题,提出了反映团队成员之间、成员和团队之间关系的群体效用模型,并根据此模型进行团队成员的选择,从而把团队成员选择问题转化为一个组合优化问题。证明了基于群体效用模型进行团队成员选择的问题是NP-hard问题,并且提出了基于ORASP技术和禁忌算法的启发式算法,最后给出了算例。 相似文献
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捷径冲突是AdHvc网络中QoS路由特有的一种现象,它由WenjianShao在[2]中首次提出.本文进一步研究了捷径冲突现象,给出了一个更加准确的定义,且给出了一个基于时分的分布式QoS路由算法成功地避免了捷径冲突现象.本算法是基于TDMA的分布式算法,每个节点只需了解网络的局部信息即可.数据分析表明本算法预留的最大带宽比较接近AdHoc网络中所能用的最大带宽. 相似文献
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基于径向基函数网络的虚拟物流企业伙伴选择方法研究 总被引:5,自引:0,他引:5
在对虚拟物流企业系统研究的基础上 ,针对虚拟物流企业伙伴选择问题的特点 ,给出了一个面对虚拟物流企业伙伴选择问题的较为全面的选择过程框架 .并提出了一个基于径向基函数网络算法的虚拟物流企业伙伴选择模型 ,实例仿真说明了该算法和模型的有效性 . 相似文献
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本对于全局优化问题提出一个改进的进化规划算法,该算法以概率p接收基于电磁理论求出合力方向作为随机搜索方向,以概率1-p接收按正态分布产生的随机搜索方向。改进算法不仅克服了传统进化规划算法随机搜索的盲目性,而且保留了传统进化规划算法全局搜索性。本算法应用于几个典型例题,数值结果表明本算法是可行的,有效的。 相似文献
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约束传播算法是求解约束满足问题的一种重要方法。调度问题是一种特殊的约束满足问题。本介绍了调度问题中的Edge-Finding和Energy-Reasoning两种分离约束传播算法,并对它们进行了比较,中最后给出了一种结合Energy-Reasoning的Edge-Finding改进算法。 相似文献
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针对不可恢复道路堵塞的路径选择问题,分析了堵塞发生的不同起始时间对通过被堵塞边的费用(时间)产生的影响,这种影响引起的后效性使得这个问题不适合用动态规划中逆序推算方法求解。本设计了一种算法(MDA),对经典的Dijkstra算法中的权值计算进行了修正,证明了算法的复杂性为O(n^2),并用该算法对模型进行了求解。最后通过一个算例分析,对算法进行了验证。 相似文献
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An arbitrary starting variable dimension algorithm is proposed to compute an integer point of an n-dimensional simplex. It is based on an integer labeling rule and a triangulation of Rn. The algorithm consists of two interchanging phases. The first phase of the algorithm is a variable dimension algorithm, which generates simplices of varying dimensions,and the second phase of the algorithm forms a full-dimensional pivoting procedure, which generates n-dimensional simplices. The algorithm varies from one phase to the other. When the matrix defining the simplex is in the so-called canonical form, starting at an arbitrary integer point, the algorithm within a finite number of iterations either yields an integer point of the simplex or proves that no such point exists. 相似文献
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李小霞 《数学的实践与认识》2012,42(21):197-203
运算器对于CPU的性能有重要影响,除法器是运算器的一个重要组件.除法器电路常用不恢复余数法,但声称采用了不恢复余数法的各种电路采用的算法却有明显区别.及其前导文试图对不恢复余数法和不恢复余数阵列除法器电路进行分析.前导给出了不恢复余数法的一种初始形式,将给出初始形式的等效变形并展示阵列除法器电路是这种等效算法的硬件实现. 相似文献
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In this paper, the problem of computing the suboptimal output feedback gains of decentralized control systems is investigated. First, the problem is formulated. Then, the gradient matrices based on the index function are derived and a new algorithm is established based on some nice properties. This algorithm shows that a suboptimal gain can be computed by solving several ordinary differential equations (ODEs). In order to find an initial condition for the ODEs, an algorithm for finding a stabilizing output feedback gain is exploited, and the convergence of this algorithm is discussed. Finally, an example is given to illustrate the proposed algorithm. 相似文献
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一种改进的禁忌搜索算法及其在连续全局优化中的应用 总被引:2,自引:1,他引:1
禁忌搜索算法是一种元启发式的全局优化算法,是局部搜索算法的一种推广,已被成功地应用于许多组合优化问题中。本文针对有界闭区域上的连续函数全局优化问题,提出了一种改进的禁忌搜索算法,并进行了理论分析和数值实验。数值实验表明,对于连续函数全局优化问题的求解该算法是可行有效的,并且结构简单,迭代次数较少,是一种较好的全局启发式优化算法。 相似文献
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Yaguang Yang 《Numerical Algorithms》2017,74(4):967-996
Mehrotra’s algorithm has been the most successful infeasible interior-point algorithm for linear programming since 1990. Most popular interior-point software packages for linear programming are based on Mehrotra’s algorithm. This paper describes a proposal and implementation of an alternative algorithm, an arc-search infeasible interior-point algorithm. We will demonstrate, by testing Netlib problems and comparing the test results obtained by the arc-search infeasible interior-point algorithm and Mehrotra’s algorithm, that the proposed arc-search infeasible interior-point algorithm is a more reliable and efficient algorithm than Mehrotra’s algorithm. 相似文献
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Multiobjective linear programming algorithms are typically based on value maximization. However, there is a growing body of experimental evidence showing that decision maker behavior is inconsistent with value maximization. Tversky and Simonson provide an alternative model for problems with a discrete set of choices. Their model, called the componential context model, has been shown to capture observed decision maker behavior. In this paper, an interactive multiobjective linear programming algorithm is developed which follows the rationale of Tversky and Simonson. The algorithm is illustrated with an example solved using standard linear programming software. Finally, an interactive decision support system based on this algorithm is developed to field test the usefulness of the algorithm. Results show that this algorithm compares favorably with an established algorithm in the field. 相似文献
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We propose an extrapolation algorithm for initial value problems in ordinary differential equations. In the algorithm, an appropriately chosen stepsizeH is divided into smaller stepsizes by a sequence and a new stopping rule is proposed. The sequences applied to the algorithm are Romberg {2,4,8,16,32,...}, Bulirsch {2,4,6,8,16...} and Harmonic {2,4,6,8,10,12,...} types. The proposed algorithm is compared numerically with the algorithm introduced by Stoer. In view of the accuracy of numerical solutions, the relatively small number of calculations, the stability and reliability of the algorithm, we found that the algorithm with the Romberg sequence is the best. 相似文献
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《Journal of computational and graphical statistics》2013,22(4):1007-1023
We extend the least angle regression algorithm using the information geometry of dually flat spaces. The extended least angle regression algorithm is used for estimating parameters in generalized linear regression, and it can be also used for selecting explanatory variables. We use the fact that a model manifold of an exponential family is a dually flat space. In estimating parameters, curves corresponding to bisectors in the Euclidean space play an important role. Originally, the least angle regression algorithm is used for estimating parameters and selecting explanatory variables in linear regression. It is an efficient algorithm in the sense that the number of iterations is the same as the number of explanatory variables. We extend the algorithm while keeping this efficiency. However, the extended least angle regression algorithm differs significantly from the original algorithm. The extended least angle regression algorithm reduces one explanatory variable in each iteration while the original algorithm increases one explanatory variable in each iteration. We show results of the extended least angle regression algorithm for two types of datasets. The behavior of the extended least angle regression algorithm is shown. Especially, estimates of parameters become smaller and smaller, and vanish in turn. 相似文献
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András Frank 《Journal of Combinatorial Theory, Series B》1984,36(3):221-239
A combinatorial algorithm for finding a feasible vector of the Edmonds-Giles polyhedron is presented. The algorithm is polynomially bounded provided that an oracle is available for minimizing submodular functions. A feasibility theorem is also proved by the algorithm and, as a consequence, a good algorithm for finding an integer-valued modular function between a sub- and a supermodular function is deduced. An important idea in the algorithm is due to Schönsleben and Lawler and Martel: the shortest augmenting paths have to be chosen in a lexicographic order. 相似文献