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Consequently, we study uncertain measures like roughness measure, accuracy measure, entropy and granularity for covering rough set models which are defined by neighborhoods and friends. Some theoretical results are obtained and investigated. <\/jats:p>","DOI":"10.1142\/s021848851450010x","type":"journal-article","created":{"date-parts":[[2014,4,14]],"date-time":"2014-04-14T04:19:50Z","timestamp":1397449190000},"page":"217-233","source":"Crossref","is-referenced-by-count":13,"title":["Uncertainty Measurement for Covering Rough Sets"],"prefix":"10.1142","volume":"22","author":[{"given":"Jianhua","family":"Dai","sequence":"first","affiliation":[{"name":"College of Computer Science, Zhejiang University, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Debiao","family":"Huang","sequence":"additional","affiliation":[{"name":"College of Computer Science, Zhejiang University, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huashi","family":"Su","sequence":"additional","affiliation":[{"name":"College of Computer Science, Zhejiang University, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haowei","family":"Tian","sequence":"additional","affiliation":[{"name":"College of Computer Science, Zhejiang University, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tian","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Science, Central South University of Forestry and Technology, Changsha 410082, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2014,4,14]]},"reference":[{"key":"p_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF01001956"},{"key":"p_3","doi-asserted-by":"publisher","DOI":"10.1016\/j.knosys.2011.06.010"},{"key":"p_4","doi-asserted-by":"publisher","DOI":"10.1016\/j.asoc.2011.08.023"},{"key":"p_5","doi-asserted-by":"publisher","DOI":"10.1016\/j.asoc.2012.07.029"},{"key":"p_6","doi-asserted-by":"publisher","DOI":"10.1016\/j.knosys.2013.01.010"},{"key":"p_7","doi-asserted-by":"publisher","DOI":"10.1016\/j.knosys.2012.10.018"},{"key":"p_8","doi-asserted-by":"publisher","DOI":"10.1016\/j.ins.2013.04.023"},{"key":"p_9","doi-asserted-by":"publisher","DOI":"10.1016\/j.fss.2013.03.005"},{"key":"p_10","doi-asserted-by":"publisher","DOI":"10.1016\/j.asoc.2011.11.025"},{"key":"p_11","doi-asserted-by":"publisher","DOI":"10.1016\/S0167-8655(02)00196-4"},{"key":"p_12","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-0255(98)10021-X"},{"key":"p_13","doi-asserted-by":"publisher","DOI":"10.1016\/j.ins.2012.04.018"},{"key":"p_14","first-page":"176","volume":"3","author":"Dai J. 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