Let G be a directed graph such that every edge e of G is associated with a positive integer, called the index of e. Then G is called a network graph if, at every vertex v of G, the sum of the indices ...

The presentation will introduce the DACM (Dimensional Analysis Conceptual Modeling) approach as a way to represent an engineering problem in the form of oriented colored graphs. The foundations of the ...

This is a preview. Log in through your library . Abstract Previous studies on post-reform market performance of Chinese grain markets have produced mixed results. This paper employs province-level ...