Based on the analysis of the current situation of grain terminal and throughput in the Pearl River Delta, this paper forecasts the grain demands and throughput of the Pearl River Delta in the future through coordination between production and marketing, and analyzes the development trend of grain transportation structure of the Pearl River Delta in the days to come.

Output optimization with balance between production and marketing;

According to the characters and requirements of transport issue,based on the lowest transport cost, the paper sets up a mathematical model forthe unbalanced production-marketing transport issue and transforms this modelto balanced production-marketing transport issue and then introduces geneticalgorithm into the solution of model.

This paper investigates an unbalanced production-marketing shortest-time transportation problem.

While the table-manipulation method is used to solve the transportion problem with balanced supply and demand and there exisits the case of degeneration-solution, more accurate rules, which can avoid the possibly existing redundant calculation, are presented for filling zero in corresponding blanket of the balanced table in the paper.