{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,3]],"date-time":"2026-03-03T17:28:57Z","timestamp":1772558937155,"version":"3.50.1"},"reference-count":28,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2016,2,16]],"date-time":"2016-02-16T00:00:00Z","timestamp":1455580800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Colleges and Universities\u2019 Research Foundation for Ph.D. Program of China","award":["20120191110023"],"award-info":[{"award-number":["20120191110023"]}]},{"name":"Project of Chongqing Science &amp; Technology talent cultivating","award":["cstc2013kjrc-tdjs40008"],"award-info":[{"award-number":["cstc2013kjrc-tdjs40008"]}]},{"name":"2013 Innovative Team Construction Project of Chongqing Universities","award":["KJTD201331"],"award-info":[{"award-number":["KJTD201331"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The feature extraction technique for an electronic nose (e-nose) applied in tobacco smell detection in an open country\/outdoor environment with periodic background strong interference is studied in this paper. Principal component analysis (PCA), Independent component analysis (ICA), re-filtering and a priori knowledge are combined to separate and suppress background interference on the e-nose. By the coefficient of multiple correlation (CMC), it can be verified that a better separation of environmental temperature, humidity, and atmospheric pressure variation related background interference factors can be obtained with ICA. By re-filtering according to the on-site interference characteristics a composite smell curve was obtained which is more related to true smell information based on the tobacco curer\u2019s experience.<\/jats:p>","DOI":"10.3390\/s16020233","type":"journal-article","created":{"date-parts":[[2016,2,16]],"date-time":"2016-02-16T10:39:15Z","timestamp":1455619155000},"page":"233","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Suppression of Strong Background Interference on E-Nose Sensors in an Open Country Environment"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5306-6690","authenticated-orcid":false,"given":"Fengchun","family":"Tian","sequence":"first","affiliation":[{"name":"College of Communication Engineering, Chongqing University, 174 Sha Pingba, Chongqing 400044, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9962-0693","authenticated-orcid":false,"given":"Jian","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, Chongqing University, 174 Sha Pingba, Chongqing 400044, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6888-7993","authenticated-orcid":false,"given":"Simon","family":"Yang","sequence":"additional","affiliation":[{"name":"Advanced Robotics and Intelligent Systems (ARIS) Lab, School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada"}]},{"given":"Zhenzhen","family":"Zhao","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, Chongqing University, 174 Sha Pingba, Chongqing 400044, China"}]},{"given":"Zhifang","family":"Liang","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, Chongqing University, 174 Sha Pingba, Chongqing 400044, China"}]},{"given":"Yan","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, Chongqing University, 174 Sha Pingba, Chongqing 400044, China"}]},{"given":"Di","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Communication Engineering, Chongqing University, 174 Sha Pingba, Chongqing 400044, China"}]}],"member":"1968","published-online":{"date-parts":[[2016,2,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1146","DOI":"10.1016\/j.jfoodeng.2006.09.006","article-title":"Monitoring of black tea fermentation process using electronic nose","volume":"80","author":"Bhattacharyya","year":"2007","journal-title":"J. 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