{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,3,22]],"date-time":"2025-03-22T09:29:12Z","timestamp":1742635752777},"reference-count":28,"publisher":"World Scientific Pub Co Pte Lt","issue":"05","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Unc. Fuzz. Knowl. Based Syst."],"published-print":{"date-parts":[[2011,10]]},"abstract":"<jats:p>An important and difficult issue in designing a Fuzzy Inference System (FIS) is the specification of fuzzy sets and fuzzy rules. In this paper, two useful qualitative properties of the FIS model, i.e., the monotonicity and sub-additivity properties, are studied. The monotonic sufficient conditions of the FIS model with Gaussian membership functions are further analyzed. The aim is to incorporate the sufficient conditions into the FIS modeling process, which serves as a simple (which can be easily understood by domain users), easy-to-use (which can be easily applied to or can be a part of the FIS model), and yet reliable (which has a sound mathematical foundation) method to preserve the monotonicity property of the FIS model. Another aim of this paper is to demonstrate how these additional qualitative information can be exploited and extended to be part of the FIS designing procedure (i.e., for fuzzy sets and fuzzy rules design) via the sufficient conditions (which act as a set of useful governing equations for designing the FIS model). The proposed approach is able to avoid the \"trial and error\" procedure in obtaining a monotonic FIS model. To assess the applicability of the proposed approach, two practical problems are examined. The first is an FIS-based model for water level control, while the second is an FIS-based Risk Priority Number (RPN) model in Failure Mode and Effect Analysis (FMEA). To further illustrate the importance of the sufficient conditions as the governing equations, an analysis on the consequences of violating the sufficient conditions of the FIS-based RPN model is presented.<\/jats:p>","DOI":"10.1142\/s0218488511007210","type":"journal-article","created":{"date-parts":[[2011,9,28]],"date-time":"2011-09-28T09:13:25Z","timestamp":1317201205000},"page":"731-757","source":"Crossref","is-referenced-by-count":31,"title":["ON MONOTONIC SUFFICIENT CONDITIONS OF FUZZY INFERENCE SYSTEMS AND THEIR APPLICATIONS"],"prefix":"10.1142","volume":"19","author":[{"given":"KAI MENG","family":"TAY","sequence":"first","affiliation":[{"name":"Faculty of Engineering, Universiti Malaysia Sarawak, 94300, Kota Samarahan, Sarawak, Malaysia"}]},{"given":"CHEE PENG","family":"LIM","sequence":"additional","affiliation":[{"name":"School of Computer Sciences, University of Science Malaysia, 11800, Pulau Pinang, Malaysia"}]}],"member":"219","published-online":{"date-parts":[[2011,11,21]]},"reference":[{"key":"rf1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijar.2006.01.004"},{"key":"rf2","doi-asserted-by":"publisher","DOI":"10.1016\/S0165-0114(02)00121-5"},{"key":"rf3","doi-asserted-by":"publisher","DOI":"10.1016\/j.fss.2009.02.001"},{"key":"rf4","doi-asserted-by":"publisher","DOI":"10.1016\/j.fss.2008.03.014"},{"key":"rf5","doi-asserted-by":"publisher","DOI":"10.1109\/TFUZZ.2009.2023328"},{"key":"rf6","doi-asserted-by":"publisher","DOI":"10.1016\/S0005-1098(99)00154-5"},{"key":"rf7","doi-asserted-by":"publisher","DOI":"10.1007\/s10700-008-9036-z"},{"key":"rf8","doi-asserted-by":"publisher","DOI":"10.1007\/s10700-008-9037-y"},{"key":"rf9","doi-asserted-by":"publisher","DOI":"10.1109\/TAC.2003.817920"},{"key":"rf12","volume-title":"An Introduction to Measure and Integration","author":"Rana I. 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