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A gas tracking network can monitor hazardous gas diffusion using traceability technology combined with sensors distributed within the scope of a chemical industry park. Such systems can automatically locate the source of pollutants in a timely manner and notify relevant departments to take major hazards into their control. However, tracing the source of the leak in a large area is still a tough problem, especially within an urban area. In this paper, the diffusion of 79 potential leaking sources with consideration of different weather conditions and complex urban terrain is simulated by AERMOD. Only 61 sensors are used to monitor the gas concentration within such a large scale. A fully connected network trained with a hybrid strategy is proposed to trace the leaking source effectively and robustly. Our proposed model reaches a final classification accuracy of 99.14%.<\/jats:p>","DOI":"10.3390\/a16070342","type":"journal-article","created":{"date-parts":[[2023,7,18]],"date-time":"2023-07-18T01:35:16Z","timestamp":1689644116000},"page":"342","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Leaking Gas Source Tracking for Multiple Chemical Parks within An Urban City"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7227-6917","authenticated-orcid":false,"given":"Junwei","family":"Lang","sequence":"first","affiliation":[{"name":"Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310058, China"}]},{"given":"Zhenjia","family":"Zeng","sequence":"additional","affiliation":[{"name":"Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310058, China"},{"name":"Taizhou Research Institute, Zhejiang University, Taizhou 317700, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7664-8979","authenticated-orcid":false,"given":"Tengfei","family":"Ma","sequence":"additional","affiliation":[{"name":"Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310058, China"},{"name":"Taizhou Agility Smart Technologies Co., Ltd, Taizhou 317700, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3401-1125","authenticated-orcid":false,"given":"Sailing","family":"He","sequence":"additional","affiliation":[{"name":"Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310058, China"},{"name":"Taizhou Research Institute, Zhejiang University, Taizhou 317700, China"},{"name":"Taizhou Agility Smart Technologies Co., Ltd, Taizhou 317700, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"144694","DOI":"10.1016\/j.scitotenv.2020.144694","article-title":"Application of an emission profile-based method to trace the sources of volatile organic compounds in a chemical industrial park","volume":"768","author":"Huang","year":"2021","journal-title":"Sci. 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