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- W4280549649 abstract "The surface water temperature is a vital ecological and climate variable, and its monitoring is critical. An extensive sensor network measures the ocean, but outliers pervade the monitoring data due to the sudden change in the water surface level. No single algorithm can identify the outlier efficiently. Hence, this work aims to propose and evaluate the performance of three statistical-based outlier detection algorithms for the water surface temperature: 1) the Standard Z-Score method, 2) the Modified Z-Score coupled with decomposition, and 3) the Exponential Moving Average with the Coupled Modified Z-Score and decomposition. A threshold was set to flag the outlier values. The models' performance was evaluated using the F-score method. Results showed that an increase in outlier detection might reduce the precision of identifying the actual outlier. Based on the results, the Exponential Moving Average with the Modified Z-Score gave the highest F-score value (= 0.83) compared to the other two individual methods. Therefore, this proposed algorithm is recommended to detect outliers efficiently in large surface water temperature datasets." @default.
- W4280549649 created "2022-05-22" @default.
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- W4280549649 date "2022-07-01" @default.
- W4280549649 modified "2023-10-18" @default.
- W4280549649 title "Detecting outliers in a univariate time series dataset using unsupervised combined statistical methods: A case study on surface water temperature" @default.
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- W4280549649 doi "https://doi.org/10.1016/j.ecoinf.2022.101672" @default.
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