the analytical hierarchy process ( ahp ) and grey correlation theory is applied in determining weights of affecting factors, and the method of membership grade function is used in establishing single factor evaluation matrix, which each impact factor can be fuzzed 利用層次分析法和灰色關(guān)聯(lián)分析理論確定影響因素的權(quán)重大小,通過隸屬函數(shù)法建立單因素評價(jià)矩陣,實(shí)現(xiàn)對各影響因素的模糊化處理。