Narrow search
Showing 1 - 10 of 83
Cover Image
Novel heuristic density-based method for community detection in networks
Gong, Maoguo; Liu, Jie; Ma, Lijia; Cai, Qing; Jiao, Licheng - In: Physica A: Statistical Mechanics and its Applications 403 (2014) C, pp. 71-84
Recent years have witnessed a growing recognition on the community detection in networks. Diverse techniques have been devoted to uncovering community structures in complex networks and amongst which are the density-based methods. Density-based avenues are very popular in data clustering field....
Persistent link: https://www.econbiz.de/10010873860
Cover Image
Optimization with extremal dynamics for the traveling salesman problem
Chen, Yu-Wang; Lu, Yong-Zai; Chen, Peng - In: Physica A: Statistical Mechanics and its Applications 385 (2007) 1, pp. 115-123
By mapping the optimization problems to physical systems, the paper presents a general-purpose stochastic optimization …. As self-organized critical processes of extremal dynamics, the optimization dynamics successively updates the states of … those cities with high energy. Consequently, a near-optimal solution can be quickly obtained through the optimization …
Persistent link: https://www.econbiz.de/10010873862
Cover Image
A new procedure modeling the probability distribution of earthquake size
Wang, J.P.; Yun, X.; Chang, S.C. - In: Physica A: Statistical Mechanics and its Applications 413 (2014) C, pp. 385-393
a simulation, on the basis of performing optimization to search for the optimum model parameter. The new option and an … and the power of optimization, three case studies presented in this paper all indicate that the new optimization procedure … can indeed improve such a simulation over the existing procedure. Moreover, with a proper tool such as Excel Solver …
Persistent link: https://www.econbiz.de/10010906973
Cover Image
Optimization of highway networks and traffic forecasting
Schadschneider, Andreas; Knospe, Wolfgang; Santen, Ludger; … - In: Physica A: Statistical Mechanics and its Applications 346 (2005) 1, pp. 165-173
also discuss an analysis of the highway network in Germany to identify bottlenecks and possible optimization strategies. …
Persistent link: https://www.econbiz.de/10010871670
Cover Image
Optimal traffic networks topology: A complex networks perspective
Wu, Jian-Jun; Gao, Zi-You; Sun, Hui-jun - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 4, pp. 1025-1032
We investigate and analyse an optimal traffic network structure for resisting traffic congestion with different volumes of traffic. For this aim, we introduce a cost function and user-equilibrium assignment (UE) which ensures the flow balance on traffic systems. Our finding is that an optimal...
Persistent link: https://www.econbiz.de/10010871687
Cover Image
A stable and robust calibration scheme of the log-periodic power law model
Filimonov, V.; Sornette, D. - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 17, pp. 3698-3707
We present a simple transformation of the formulation of the log-periodic power law formula of the Johansen–Ledoit–Sornette (JLS) model of financial bubbles that reduces it to a function of only three nonlinear parameters. The transformation significantly decreases the complexity of the...
Persistent link: https://www.econbiz.de/10010679200
Cover Image
Mutually beneficial relationship in optimization between search-space smoothing and stochastic search
Hasegawa, Manabu; Hiramatsu, Kotaro - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 19, pp. 4491-4501
The effectiveness of the Metropolis algorithm (MA) (constant-temperature simulated annealing) in optimization by the …. The optimization mechanism of this hybrid approach (MASSS) is investigated by analyzing the exploration dynamics observed … as a local search algorithm in the SSS approach. It is also clarified that the optimization characteristics of these two …
Persistent link: https://www.econbiz.de/10010682561
Cover Image
Statistics of stable marriages
Dzierzawa, Michael; Oméro, Marie-José - In: Physica A: Statistical Mechanics and its Applications 287 (2000) 1, pp. 321-333
In the stable marriage problem N men and N women have to be matched by pairs under the constraint that the resulting matching is stable. We study the statistical properties of stable matchings in the large N limit using both numerical and analytical methods. Generalizations of the model...
Persistent link: https://www.econbiz.de/10010589197
Cover Image
Beauty and distance in the stable marriage problem
Caldarelli, G.; Capocci, A. - In: Physica A: Statistical Mechanics and its Applications 300 (2001) 1, pp. 325-331
The stable marriage problem has been introduced in order to describe a complex system where individuals attempt to optimise their own satisfaction, subject to mutually conflicting constraints. Due to the potential large applicability of such model to describe all the situation where different...
Persistent link: https://www.econbiz.de/10010589231
Cover Image
High-resolution path-integral development of financial options
Ingber, Lester - In: Physica A: Statistical Mechanics and its Applications 283 (2000) 3, pp. 529-558
are fit to determine exponents of functional behavior of diffusions using methods of global optimization, adaptive …
Persistent link: https://www.econbiz.de/10010589247