Comprehensive analysis of farming constitutes a factor of the path cost to construct a quantitative computational model of weight, distance of farming as well as impact factor and other factors, is the evaluation of theoretical models; On this basis, the cost of farming path based on relational data

And then in a comprehensive and integrated analysis of the cultivation path cost a factor in constructing the load, impact factor, as well as distance from farming, such as the quantitative factor calculated for the evaluation model, that is the theoretical model; on this basis, and based on relatio

Then, the comprehensive generalized analysis cultivation way cost constitution factor, constructed

And, full integrated analysis farming path cost of constitute factor, construction has loading, and farming distance and effect factor, constitute factor of quantitative calculation model, is for evaluation of theory model; this Foundation Shang, pursuant to relationship database theory design has f