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Effect of gravitational force upon traffic flow with gradients

Komada, Kazuhito; Masukura, Shuichi; Nagatani, Takashi - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 14, pp. 2880-2894

We study the effect of gravitational force upon traffic flow on a highway with sag, uphill, and downhill. We extend the optimal velocity model to take into account the gravitational force which acts on vehicles as an external force. We study the traffic states and jamming transitions induced by...

Persistent link: https://www.econbiz.de/10010872492

Manipulation with heterogeneity within a species population formulated as an inverse problem

Horváth, D.; Brutovsky, B.; Kočišová, J.; Šprinc, S. - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 21, pp. 5028-5036

within the frame of evolutionary optimization theory. As the causal relation between the heterogeneity and dynamics of …

Persistent link: https://www.econbiz.de/10011063135

Inverse problem for multivariate time series using dynamical latent variables

Zamparo, M.; Stramaglia, S.; Banavar, J.R.; Maritan, A. - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 11, pp. 3159-3169

Factor analysis is a well known statistical method to describe the variability among observed variables in terms of a smaller number of unobserved latent variables called factors. While dealing with multivariate time series, the temporal correlation structure of data may be modeled by including...

Persistent link: https://www.econbiz.de/10010589010

On the optimization of multitasking process with multiplayer

Zhou, Bin; He, Zhe; Wang, Nianxin; Xi, Zhendong; Li, Yujian - In: Physica A: Statistical Mechanics and its Applications 417 (2015) C, pp. 41-45

study the optimization problems of MPM. The average time spent for all the tasks by an individual is calculated in each …

Persistent link: https://www.econbiz.de/10011077847

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

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

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

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

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 …

Persistent link: https://www.econbiz.de/10010906973

Investigation of acceptance simulated annealing — A simplified approach to adaptive cooling schedules

Schneider, Johannes J.; Puchta, Markus - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 24, pp. 5822-5831

Simulated annealing is the classic physical optimization algorithm, which has been applied to a large variety of …

Persistent link: https://www.econbiz.de/10011057811