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Self-Organization of Topology and Weight Dynamics on Networks from Merging and Regeneration 总被引：1，自引：0，他引：1 
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下载免费PDF全文 We propose a model of weighted networks in which the structural evolution is coupled with weight dynamics. Based on a simple merging and regeneration process, the model gives powel-law distributions of degree, strength and weight, as observed in many real networks. It should be emphasized that, in our model, the nontrivial degree-strength correlation can be reproduced and in agreement with empirical data. Moreover, the size-growing evolution model is also presented to meet the properties of real-world systems. 相似文献
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平衡规划问题的熵函数方法及其在混合交通流中的应用 总被引：1，自引：0，他引：1
将参变极值问题的极大熵函数方法应用到求解平衡规划问题中,通过先验分布信息和Kullback熵概念,给出了平衡规划问题基于Kullback熵表示的熵函数求解方法,并将平衡规划的极大熵函数方法应用于求解混合交通平衡分配问题． 相似文献
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通过分析双层线性规划可行域的结构特征和全局最优解在约束域的极点上达到这一特性,对单纯形方法中进基变量的选取法则进行适当修改后,给出了一个求解双层线性规划局部最优解方法,然后引进上层目标函数对应的一种割平面约束来修正当前局部最优解,直到求得双层线性规划的全局最优解.提出的算法具有全局收敛性,并通过算例说明了算法的求解过程. 相似文献
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This paper studies the cascading failure on random networks andscale-free networks by introducing the tolerance parameter of edgebased on the coupled map lattices methods. The whole work focuses oninvestigating some indices including the number of failed edges,dynamic edge tolerance capacity and the perturbation of edge. Ingeneral, it assumes that the perturbation is attributed to thenormal distribution in adopted simulations. By investigating theeffectiveness of edge tolerance in scale-free and random networks,it finds that the larger tolerance parameter λ can moreefficiently delay the cascading failure process for scale-freenetworks than random networks. These results indicate that thecascading failure process can be effectively controlled byincreasing the tolerance parameter λ. Moreover, thesimulations also show that, larger variance of perturbation caneasily trigger the cascading failures than the smaller one. Thisstudy may be useful for evaluating efficiency of whole trafficsystems, and for alleviating cascading failure in such systems. 相似文献
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This paper studies a simple asymmetrically evolved communitynetwork with a combination of preferential attachment and randomproperties. An important issue about community networks is todiscover the different utility increments of two nodes, where theutility is introduced to investigate the asymmetrical effect ofconnecting two nodes. On the other hand, the connection of two nodesin community networks can be classified as two nodes belonging to thesame or to different communities. The simulation results show that themodel can reproduce a power-law utility distribution P(u)～u-σ, σ = 2 + 1/p, which can be obtained byusing mean-field approximation methods. Furthermore, the modelexhibits exponential behaviour with respect to small values of aparameter denoting the random effect in our model at the low-utilityregion and a power-law feature with respect to big values of thisparameter at the high-utility region, which is in good agreement withtheoretical analysis. This kind of community network can reproducea unique utility distribution by theoretical and numerical analysis. 相似文献
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In this paper, cascading failure is studied by coupled map lattice （CML） methods in preferential attachment community networks. It is found that external perturbation R is increasing with modularity Q growing by simulation. In particular, the large modularity Q can hold off the cascading failure dynamic process in community networks. Furthermore, different attack strategies also greatly affect the cascading failure dynamic process. It is particularly significant to control cascading failure process in real community networks. 相似文献
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该文通过构造特殊形式的有效集来逼近KKT点处的有效集,给出了一个任意初始点下的序列线性方程组新算法,并证明了该算法在没有严格互补松驰条件的情况下具有全局收敛性和一步超线性收敛性。 相似文献
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1 IntroductionWe consider tlie variational inequality problelll, deuoted by VIP(X, F), wliicli is to find avector x* E X such thatF(X*)\"(X -- X-) 2 0, VX E X, (1)where F: R\" - R\" is any vector-valued f11uction and X is a uonelllpty subset of R'.This problem has important applicatiolls. in equilibriun1 modeIs arising in fields such asecououtics, transportatioll scieuce alld operations research. See [1]. There exist mauy lllethodsfor solviug tlie variational li1equality problem VIP(X. … 相似文献