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In recent years, with the rapid development of sensor technology and mobile device technology, more autonomous search algorithms for hazardous gas emission sources are proposed in uncertain environment, which can avoid emergency personnel from contacting hazardous gas in a short distance. Infotaxis is an autonomous search strategy without a concentration gradient, which uses scattered sensor data to track the location of the release source in turbulent environment. This paper optimizes the imbalance of exploitation and exploration in the reward function of Infotaxis algorithm and proposes a mobile strategy for the three-dimensional scene. In two-dimensional and three-dimensional scenes, the average steps of search tasks are used as the evaluation criteria to analyze the information trend algorithm combined with different reward functions and mobile strategies. The results show that the balance between the exploitation item and exploration item of the reward function proposed in this paper is better than that of the reward function in the Infotaxis algorithm, no matter in the two-dimensional scenes or in the three-dimensional scenes.<\/jats:p>","DOI":"10.1155\/2020\/4159241","type":"journal-article","created":{"date-parts":[[2020,8,25]],"date-time":"2020-08-25T23:31:28Z","timestamp":1598398288000},"page":"1-14","source":"Crossref","is-referenced-by-count":6,"title":["A Study of Modified Infotaxis Algorithms in 2D and 3D Turbulent Environments"],"prefix":"10.1155","volume":"2020","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0091-4182","authenticated-orcid":true,"given":"Shurui","family":"Fan","sequence":"first","affiliation":[{"name":"Tianjin Key Laboratory of Electronic Materials Devices, School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, 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