Matching gradient descriptors with topological constraints to characterise the crowd dynamics

2006 ◽  
Author(s):  
B. Zhan ◽  
P. Remagnino ◽  
S. Velastin ◽  
F. Bremond ◽  
M. Thonnat
Keyword(s):  
Topological Constraints ◽  
Crowd Dynamics

scholarly journals ModularBoost: an efficient network inference algorithm based on module decomposition

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Xinyu Li ◽  
Wei Zhang ◽  
Jianming Zhang ◽  
Guang Li
Keyword(s):  
Network Inference ◽  
Detection Methods ◽  
Inference Problem ◽  
Topological Constraints ◽  
Inference Algorithms ◽  
Module Detection ◽  
Series Expression ◽  
Gene Modules ◽  
Inference Methods ◽  
Complicated Task

Abstract Background Given expression data, gene regulatory network(GRN) inference approaches try to determine regulatory relations. However, current inference methods ignore the inherent topological characters of GRN to some extent, leading to structures that lack clear biological explanation. To increase the biophysical meanings of inferred networks, this study performed data-driven module detection before network inference. Gene modules were identified by decomposition-based methods. Results ICA-decomposition based module detection methods have been used to detect functional modules directly from transcriptomic data. Experiments about time-series expression, curated and scRNA-seq datasets suggested that the advantages of the proposed ModularBoost method over established methods, especially in the efficiency and accuracy. For scRNA-seq datasets, the ModularBoost method outperformed other candidate inference algorithms. Conclusions As a complicated task, GRN inference can be decomposed into several tasks of reduced complexity. Using identified gene modules as topological constraints, the initial inference problem can be accomplished by inferring intra-modular and inter-modular interactions respectively. Experimental outcomes suggest that the proposed ModularBoost method can improve the accuracy and efficiency of inference algorithms by introducing topological constraints.

scholarly journals Topological constraints in the reconnection of vortex braids

2021 ◽  
Vol 33 (5) ◽  
pp. 056101
Author(s):  
S. Candelaresi ◽  
G. Hornig ◽  
B. Podger ◽  
D. I. Pontin
Keyword(s):  
Topological Constraints

Counterflow model for agent-based simulation of crowd dynamics

2012 ◽  
Vol 48 ◽  
pp. 89-100 ◽  
Author(s):  
Simo Heliövaara ◽  
Timo Korhonen ◽  
Simo Hostikka ◽  
Harri Ehtamo
Keyword(s):  
Agent Based Simulation ◽  
Agent Based ◽  
Crowd Dynamics

Accelerating fuzzy cellular automata for modeling crowd dynamics

2019 ◽  
Vol 32 ◽  
pp. 125-140 ◽  
Author(s):  
Ioannis Gerakakis ◽  
Prodromos Gavriilidis ◽  
Nikolaos I. Dourvas ◽  
Ioakeim G. Georgoudas ◽  
Giuseppe A. Trunfio ◽  
...  
Keyword(s):  
Cellular Automata ◽  
Crowd Dynamics ◽  
Fuzzy Cellular Automata

Medium-range topological constraints in binary phosphate glasses

2013 ◽  
Vol 138 (24) ◽  
pp. 244507 ◽  
Author(s):  
B. P. Rodrigues ◽  
L. Wondraczek
Keyword(s):  
Phosphate Glasses ◽  
Topological Constraints ◽  
Medium Range
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