Combining the reality demand of supplier s choosing in the circumstance of sup ply chain management,and by using the matter element analysis theory,this paper establishes a mathematical model based on associated function and extension judgment model for that re flects the internal regularity of su pplier choosing,and examines the effectiveness of this model through the actual exampl es.

Based on extensional theory,the evaluation matter element model for evaluation of standardization of tendering and bidding was established,and the extensional evaluation method with correlative functions was put forward.

The expandable evaluation model of regional land ecological suitability and its application.;