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Multimodality of process data is often accompanied with nonlinear and non\u2010Gaussian characteristics, which makes data\u2010driven monitoring more complicated. In this paper, statistics pattern analysis (SPA) is introduced to extract low\u2010 and high\u2010order statistics from raw process data. Support vector data description (SVDD), which can deal with nonlinear and non\u2010Gaussian problems, is applied to monitor multimode process in this paper. To improve detection performance of SVDD for training multimode data with outliers, modified local reachability density ratio (mLRDR) is proposed as a weight factor to be embedded in the weighted\u2010SVDD (wSVDD) model, in which the local neighbors in terms of both space and time are considered. Finally, the effectiveness and superiority of our proposed method are demonstrated by the Tennessee\u2010Eastman (TE) process and wastewater treatment process (WWTP).<\/jats:p>","DOI":"10.1155\/2021\/5517062","type":"journal-article","created":{"date-parts":[[2021,4,21]],"date-time":"2021-04-21T21:18:45Z","timestamp":1619039925000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["SPA\u2010Based Modified Local Reachability Density Ratio wSVDD for Nonlinear Multimode Process Monitoring"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6324-9968","authenticated-orcid":false,"given":"Zhaojing","family":"Wang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2422-9243","authenticated-orcid":false,"given":"Weidong","family":"Yang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6490-0249","authenticated-orcid":false,"given":"Hong","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9626-3360","authenticated-orcid":false,"given":"Ying","family":"Zheng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,4,21]]},"reference":[{"key":"e_1_2_8_1_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtice.2018.05.020"},{"key":"e_1_2_8_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/cjce.23778"},{"key":"e_1_2_8_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jprocont.2020.09.008"},{"key":"e_1_2_8_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemolab.2019.03.012"},{"key":"e_1_2_8_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jfranklin.2016.11.002"},{"key":"e_1_2_8_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemolab.2017.07.010"},{"key":"e_1_2_8_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jprocont.2016.09.006"},{"key":"e_1_2_8_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.compchemeng.2017.05.029"},{"key":"e_1_2_8_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.neucom.2016.03.015"},{"key":"e_1_2_8_10_2","doi-asserted-by":"publisher","DOI":"10.1109\/tie.2017.2668987"},{"key":"e_1_2_8_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.compchemeng.2015.09.013"},{"key":"e_1_2_8_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.neucom.2018.01.028"},{"key":"e_1_2_8_13_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.iecr.7b03600"},{"key":"e_1_2_8_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.compchemeng.2017.12.017"},{"key":"e_1_2_8_15_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.iecr.5b03446"},{"key":"e_1_2_8_16_2","doi-asserted-by":"publisher","DOI":"10.1016\/s0967-0661(99)00038-6"},{"key":"e_1_2_8_17_2","doi-asserted-by":"publisher","DOI":"10.1109\/tii.2018.2799600"},{"key":"e_1_2_8_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtice.2019.09.017"},{"key":"e_1_2_8_19_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemolab.2014.09.019"},{"key":"e_1_2_8_20_2","doi-asserted-by":"publisher","DOI":"10.1155\/2020\/8853277"},{"key":"e_1_2_8_21_2","doi-asserted-by":"publisher","DOI":"10.1016\/s0167-8655(99)00087-2"},{"key":"e_1_2_8_22_2","doi-asserted-by":"publisher","DOI":"10.1002\/cjce.23762"},{"key":"e_1_2_8_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knosys.2015.09.025"},{"key":"e_1_2_8_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.engappai.2020.103554"},{"key":"e_1_2_8_25_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11771-016-3353-0"},{"key":"e_1_2_8_26_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.iecr.6b03306"},{"key":"e_1_2_8_27_2","doi-asserted-by":"publisher","DOI":"10.1145\/335191.335388"},{"key":"e_1_2_8_28_2","doi-asserted-by":"publisher","DOI":"10.1021\/ie901911p"},{"key":"e_1_2_8_29_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.compchemeng.2019.04.010"},{"key":"e_1_2_8_30_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.neucom.2019.09.075"},{"key":"e_1_2_8_31_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.neucom.2013.04.042"},{"key":"e_1_2_8_32_2","doi-asserted-by":"publisher","DOI":"10.1109\/access.2018.2798278"},{"key":"e_1_2_8_33_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knosys.2014.01.020"},{"key":"e_1_2_8_34_2","doi-asserted-by":"publisher","DOI":"10.1155\/2019\/5937274"},{"key":"e_1_2_8_35_2","doi-asserted-by":"publisher","DOI":"10.1016\/0098-1354(93)80018-i"},{"key":"e_1_2_8_36_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtice.2015.05.010"},{"key":"e_1_2_8_37_2","doi-asserted-by":"publisher","DOI":"10.1016\/0098-1354(94)00043-n"},{"key":"e_1_2_8_38_2","doi-asserted-by":"publisher","DOI":"10.1109\/tase.2011.2176490"},{"key":"e_1_2_8_39_2","unstructured":"J. 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