{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T03:22:55Z","timestamp":1770780175649,"version":"3.50.0"},"reference-count":27,"publisher":"SAGE Publications","issue":"6","license":[{"start":{"date-parts":[[2017,12,1]],"date-time":"2017-12-01T00:00:00Z","timestamp":1512086400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Intelligent &amp; Fuzzy Systems"],"published-print":{"date-parts":[[2017,12]]},"abstract":"<jats:p>\n                    This paper constructs \u2112-covering fuzzy variable precision rough set and mainly studies some properties of type\u00a0I\u00a0and type II \u2112-covering fuzzy lower and upper approximation operators of \u2112-fuzzy sets on\n                    <jats:italic>X<\/jats:italic>\n                    . Topology properties of type I and type II \u2112-covering fuzzy lower and upper approximation operators are also discussed through a fuzzy interior operator and fuzzy closure operator. Moreover, we investigate the dual properties and compare between \u2112-covering fuzzy variable precision rough approximation operators.\n                  <\/jats:p>","DOI":"10.3233\/jifs-15985","type":"journal-article","created":{"date-parts":[[2017,12,1]],"date-time":"2017-12-01T12:23:49Z","timestamp":1512131029000},"page":"3181-3190","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":2,"title":["A new approach on covering fuzzy variable\u00a0precision rough sets based on\u00a0residuated lattice"],"prefix":"10.1177","volume":"33","author":[{"given":"Van Thien","family":"Le","sequence":"first","affiliation":[{"name":"School of Mathematics and Statistics, Wuhan University, Wuhan, P.R. 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