"A model of the interaction between two population centres based on Newton's Law of Universal Gravitation: two bodies in the universe attract each other in proportion to the product of their masses and inversely as the square distance between them. Thus, expected interaction between city i and city j is shown as" ....
http://www.answers.com/topic/gravity-model-1
See also:
http://en.wikipedia.org/wiki/Demographic_gravitation
http://en.wikipedia.org/wiki/Reilly's_law_of_retail_gravitation
http://en.wikipedia.org/wiki/Trip_distribution
Subscribe to:
Post Comments (Atom)
Posts
No comments:
Post a Comment