Penerapan Konsep Fuzzy Dalam Variable-centered Intelligent Rule System (Studi Kasus: Pemilihan Jurusan Di Chinese University of Hongkong)

Variable-Centered Intelligent Rule System (VCIRS) is a system which is inspired by Rule-based System (RBS) and Ripple Down Rules (RDR). The system architecture is adapted from RBS, while from RDR this system obtained its advantages. The system organized Rule Base (RB) in a special structure so that easy knowledge building, powerful knowledge inferencing and evolutionally system performance refining can be obtained in the same time. In this paper, the architecture of VCIRS is used to build an expert system for helping students to choose a department at a university. The application of this expert system is able to handle fuzzy concepts (e.g., such as good, high or rather high) which is a prominent part of sentences in natural language. This system is able to cope with exact values, fuzzy (or inexact) values and combined reasoning, allowing fuzzy and normal terms to be freely mixed in the rules and facts. An application example in this paper is a RBS which is employed fuzzy logic and fuzzy number for inexact reasoning. It uses two inexact basic concepts, i.e., fuzziness and uncertainty. A case study presented here is the department admission at Chinese University of Hongkong, formed in a RB containing with fuzzy and normal terms. From experiments performed, there's the proper result obtained comparing with the result from Z-II system (i.e., a comprehensive expert system builder tool developed by Chinese University of Hongkong) which is this paper refers to. So that the conclusion is a fuzzy VCIRS proposed here, is working properly and producing the right and true results