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this study and understand the pilots’ actual working conditions in depth. The discussion provided helpful information for the researchers to design the project. Materials. Sleep quality was monitored by Huawei Watch (GT 2 Pro ECG; Huawei Technologies, Shenzhen, Guangdong, China) and sleep diary. The wearable device monitored sleep patterns based on cardiopulmonary coupling. 20 A sleep diary for 14 d was developed from the Pittsburgh and consensus sleep diaries. 5 , 23 The N-back test targets subjects’ working memory, the temporary storing of external