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Taken the deviation between the calculated ice temperature and the measurements as the performance criterion, an optimal control model of distributed parameter systems with specific constraints of thermal properties of sea ice was proposed to determine the thermal diffusivity of sea ice. Based on sea ice physical processes, the parameterization of the thermal diffusivity was derived through field data. The simulation results illustrated that the identified parameterization of the thermal diffusivity is reasonably effective in sea ice thermodynamics. The direct relation between the thermal diffusivity of sea ice and ice porosity is physically significant and can considerably reduce the computational errors. The successful application of this method also explained that the optimal control model of distributed parameter systems in conjunction with the engineering background has great potential in dealing with practical problems.<\/jats:p>","DOI":"10.1155\/2013\/760378","type":"journal-article","created":{"date-parts":[[2013,9,9]],"date-time":"2013-09-09T17:44:50Z","timestamp":1378748690000},"page":"1-8","source":"Crossref","is-referenced-by-count":3,"title":["Thermal Diffusivity Identification of Distributed Parameter Systems to Sea Ice"],"prefix":"10.1155","volume":"2013","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6884-833X","authenticated-orcid":true,"given":"Liqiong","family":"Shi","sequence":"first","affiliation":[{"name":"State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China"}]},{"given":"Zhijun","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Coastal and Offshore Engineering, Dalian 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