Modeling Dynamic Groups for Agent-Based Pedestrian Crowd Simulations

2010 ◽  
Author(s):  
Fasheng Qiu ◽  
Xiaolin Hu
Keyword(s):  
Agent Based ◽  
Crowd Simulations ◽  
Pedestrian Crowd

A Framework for Modeling Social Groups in Agent-Based Pedestrian Crowd Simulations

2012 ◽  
Vol 4 (1) ◽  
pp. 39-58 ◽  
Author(s):  
Fasheng Qiu ◽  
Xiaolin Hu
Keyword(s):  
Social Groups ◽  
Specific Aspect ◽  
Behavior Modeling ◽  
Context Modeling ◽  
Agent Based ◽  
Layered Architecture ◽  
Group Modeling ◽  
Modeling Group ◽  
Crowd Simulations ◽  
Pedestrian Crowd

Grouping is a common phenomenon in pedestrian crowds and social groups can have significant impacts on crowd behavior. Despite its importance, how to model social groups in pedestrian crowd simulations is still an open and challenging issue. This paper presents a framework for modeling social groups in agent-based pedestrian crowd simulations. The developed framework integrates agent behavior modeling, group modeling, and social context modeling in a layered architecture, where each layer focuses on modeling a specific aspect of pedestrian crowds. A model of dynamic grouping behavior is developed to demonstrate the utility of the developed framework, and experimental results are presented.

scholarly journals Cluster based partitioning for agent-based crowd simulations

2009 ◽  
Author(s):  
Yongwei Wang ◽  
Michael Lees ◽  
Wentong Cai ◽  
Suiping Zhou ◽  
Malcol Low
Keyword(s):  
Agent Based ◽  
Crowd Simulations

Efficient Dynamic Floor Field Methods for Microscopic Pedestrian Crowd Simulations

2014 ◽  
Vol 16 (1) ◽  
pp. 264-286 ◽  
Author(s):  
Dirk Hartmann ◽  
Peter Hasel
Keyword(s):  
Computational Approach ◽  
The Other ◽  
Field Methods ◽  
Popular Medium ◽  
Crowd Simulations ◽  
On Line ◽  
Floor Field ◽  
Spatio Temporal ◽  
The One ◽  
Pedestrian Crowd

AbstractFloor field methods are one of the most popular medium-scale navigation concepts in microscopic pedestrian simulators. Recently introduced dynamic floor field methods have significantly increased the realism of such simulations, i.e. agreement of spatio-temporal patterns of pedestrian densities in simulations with real world observations. These methods update floor fields continuously taking other pedestrians into account. This implies that computational times are mainly determined by the calculation of floor fields. In this work, we propose a new computational approach for the construction of dynamic floor fields. The approach is based on the one hand on adaptive grid concepts and on the other hand on a directed calculation of floor fields, i.e. the calculation is restricted to the domain of interest. Combining both techniques the computational complexity can be reduced by a factor of 10 as demonstrated by several realistic scenarios. Thus on-line simulations, a requirement of many applications, are possible for moderate realistic scenarios.

Towards a Methodology for Situated Cellular Agent Based Crowd Simulations

2006 ◽  
pp. 203-220 ◽  
Author(s):  
Stefania Bandini ◽  
Mizar Luca Federici ◽  
Sara Manzoni ◽  
Giuseppe Vizzari
Keyword(s):  
Agent Based ◽  
Crowd Simulations

Total etch dentin bonding systems: scanning electron microscopy of the resin-dentin hybrid layer

1992 ◽  
Vol 50 (2) ◽  
pp. 1092-1093
Author(s):  
Jorge Perdigao
Keyword(s):  
Composite Resin ◽  
Mechanical Interlocking ◽  
Hybrid Layer ◽  
Agent Based ◽  
Dentin Bonding ◽  
Acid Agent ◽  
Bond Strengths ◽  
Main Component ◽  
Bonding Systems ◽  
New Generation

In 1955, Buonocore introduced the etching of enamel with phosphoric acid. Bonding to enamel was created by mechanical interlocking of resin tags with enamel prisms. Enamel is an inert tissue whose main component is hydroxyapatite (98% by weight). Conversely, dentin is a wet living tissue crossed by tubules containing cellular extensions of the dental pulp. Dentin consists of 18% of organic material, primarily collagen. Several generations of dentin bonding systems (DBS) have been studied in the last 20 years. The dentin bond strengths associated with these DBS have been constantly lower than the enamel bond strengths. Recently, a new generation of DBS has been described. They are applied in three steps: an acid agent on enamel and dentin (total etch technique), two mixed primers and a bonding agent based on a methacrylate resin. They are supposed to bond composite resin to wet dentin through dentin organic component, forming a peculiar blended structure that is part tooth and part resin: the hybrid layer.

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