Similar Search Results

Kinetic equations for smooth granular systems II. The non-homogeneous gas

Morgado, W.A.M.; Oppenheim, I. - In: Physica A: Statistical Mechanics and its Applications 252 (1998) 3, pp. 308-324

compared to the propagating modes of the system. This suggests that a mechanism of clustering is responsible for the relative …

Persistent link: https://www.econbiz.de/10010599484

Distinguishing between mean-field, moment dynamics and stochastic descriptions of birth–death–movement processes

Simpson, Matthew J.; Sharp, Jesse A.; Baker, Ruth E. - In: Physica A: Statistical Mechanics and its Applications 395 (2014) C, pp. 236-246

standard mean-field description which neglects correlation effects and clustering; (ii) a moment dynamics description which … approximately incorporates correlation and clustering effects; and (iii) averaged data from repeated discrete simulations which … directly incorporates correlation and clustering effects. Comparing these three descriptions indicates that the mean-field and …

Persistent link: https://www.econbiz.de/10010730345

Kinetic clustering and jamming transitions in a car-following model for bus route

Nagatani, Takashi - In: Physica A: Statistical Mechanics and its Applications 287 (2000) 1, pp. 302-312

The car-following model of traffic is extended to mimic bus behavior in the bus route. We study the phase transitions and bunching in the bus route model by both simulation and linear stability analysis. It is found that the jamming transitions among an inhomogeneous bunching phase, the...

Persistent link: https://www.econbiz.de/10010871569

Bipartite graphs as models of complex networks

Guillaume, Jean-Loup; Latapy, Matthieu - In: Physica A: Statistical Mechanics and its Applications 371 (2006) 2, pp. 795-813

which achieves the following challenges: it produces graphs which have the three main wanted properties (clustering, degree …

Persistent link: https://www.econbiz.de/10010871743

Statistical analysis of fixed income market

Bernaschi, Massimo; Grilli, Luca; Vergni, Davide - In: Physica A: Statistical Mechanics and its Applications 308 (2002) 1, pp. 381-390

We present cross and time series analysis of price fluctuations in the US Treasury fixed income market. Bonds have been classified according to a suitable metric based on the correlation among them. The classification shows how the correlation among fixed income securities depends strongly on...

Persistent link: https://www.econbiz.de/10010871951

Personalized PageRank Clustering: A graph clustering algorithm based on random walks

A. Tabrizi, Shayan; Shakery, Azadeh; Asadpour, Masoud; … - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 22, pp. 5772-5785

Graph clustering has been an essential part in many methods and thus its accuracy has a significant effect on many … circuits demands clustering algorithms with nearly-linear time and space complexity. In this paper we propose Personalized … PageRank Clustering (PPC) that employs the inherent cluster exploratory property of random walks to reveal the clusters of a …

Persistent link: https://www.econbiz.de/10010871970

A pattern mining approach to enhance the accuracy of collaborative filtering in sparse data domains

Ramezani, Mohsen; Moradi, Parham; Akhlaghian, Fardin - In: Physica A: Statistical Mechanics and its Applications 408 (2014) C, pp. 72-84

Recommender systems seek to find the interesting items by filtering out the worthless items. Collaborative filtering is one of the most successful recommendation approaches. It typically associates a user with a group of like-minded users based on their preferences over all the items and...

Persistent link: https://www.econbiz.de/10010872047

Evolutionary minority game on complex networks

Shang, Lihui; Wang, Xiao Fan - In: Physica A: Statistical Mechanics and its Applications 377 (2007) 2, pp. 616-624

among its agents. In particular, the performance of the system is correlated to the clustering property of the network …, where larger clustering coefficient leads to better performance. …

Persistent link: https://www.econbiz.de/10010872128

Empirical extraction of mechanisms underlying real world network generation

Itzhack, Royi; Muchnik, Lev; Erez, Tom; Tsaban, Lea; … - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 22, pp. 5308-5318

The generation mechanisms of real world networks have been described using multiple models. The mathematical features of these models are usually extrapolated from statistical properties of a snapshot of these networks. We here propose an alternative method based on direct measurement of a...

Persistent link: https://www.econbiz.de/10010872334

Hausdorff clustering of financial time series

Basalto, Nicolas; Bellotti, Roberto; De Carlo, Francesco; … - In: Physica A: Statistical Mechanics and its Applications 379 (2007) 2, pp. 635-644

A clustering procedure is introduced based on the Hausdorff distance as a similarity measure between clusters of …

Persistent link: https://www.econbiz.de/10010872503