A Study of American Journalist A.L.Strong with Particular Reference to Her Later Years Changing Thoughts;

Time geography was originally developed by Swedish geographer, Torsten Hgerstrand and his associates at the Lund University, which first applied study using time geographical approach was a computer simulation model of daily activity programmes in urban planning.

American scholar Lester Brown s ecological economics theory takes "eco-ecology" as the object, studies the philosophy and theoretical principles of his eco-economy theory, primarily studied his theory considering Chinese conditions.