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Group Contribution Method 의 작용기 분석을 위한 전문가 시스템 개발
이건홍,양기주,정준영,이인범 ( Kun Hong Lee,Gijoo Yang,June Young Jung,In Beum Lee ) 한국화학공학회 1993 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.31 No.6
A computer program which gave a functional group set from a given chemical formular was developed. This program has the form of a rule-based expert system, using the common LISP. The inference engine was developed using the forward chaining technique, and the knowledge base was composed of 80 meta rules, 34 select rules and 7 combine rules. The functional groups were chosen following the Joback group contribution method, and the functional group sets were successfully obtained for the substances of less than 8 groups.
이건홍,조윤경,한건우 ( Kun Hong Lee,Yoon Kyoung Cho,Kun Woo Han ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.5
Alumina composite membranes were manufactured using coating sols which were synthesized through sol-gel method. The AlOOH sol, prepared with the Yoldas method, appeared the most transparent and contained the smallest particles when the HCl/alkoxide molar ratio was 0.07. The same sol resulted in the unsupported γ-alumina membrane with the largest surface area. γ-Alumina layers with small pores were formed on top of the α-alumina supports with larger pores by repeating the coating-drying-calcining cycle with AlOOH sols. Dip coating, vacuum coating and pump coating methods were applied and at least 3 coating-drying-calcining cycles were necessary with 0.8 M sols. Crack formation or peeling of Coating layers were frequently observed when repeated coating-drying cycles were followed by final calcining or concentrated sols were used. Surfaces of alumina composite membranes could be modified with silica or CaO. Distribution of dopant could be controlled by changing the solutions.