Keyword Factory
This tool helps you to expand your technical vocabulary using the arXiv dataset.
Note that terms which occur infrequently in arXiv articles will not return good (if any) results.
Read about our method here.
velocity density
is associated with:
pedestrian,   
voronoi,   
empirical-data,   
bidirectional,   
traffic,   
fine,   
diagram,   
safety,   
resolve,   
relation,   
fundamental,   
flow,   
spatial,   
influence,   
characteristics,   
in-addition
Using these keywords in combination
with velocity density will
help you expand your search horizons.