In the light of views and methods systemthreory, according to different effect of polutant factors on enveronmental quality, Grey Situation Decision was used to comprehensive assessmennt for water environmental quality, Comparing with other water environmental assessment method, it is a effective and practical method.
Due to the instability of technological parameter during cheese production by zymotechnics,the principle of gray situation decision on multiple aims was adopted for analysis of different ferment acidity,CaCl-2 dosage and heat treatment temperature.
Potato regional test results of whole country(north-west of China)were analysed based on grey situation policy and decision methods of target in 2002.17main characters index were synthesized. The best and the worst varieties were selected. The results were identied with analysis of variance.
The basic principle of gray state strategy method and its application in selecting position of engineering of wood transportation by water were discussed in this paper, which can overcome the limitations of traditional methods and get more scientific and reasonable results