Forecasting annual foreign tourist arrivals to China by incorporating firefly algorithm into fractional non-homogenous discrete Grey model. - Xiaozhong Tang; Naiming Xie; Aqin Hu (Kybernetes, 2022)

A contribution-driven weighted grey relational analysis model and its application in identifying the drivers of carbon emissions. - Honghua Wu; Xue Han; Yingjie Yang; Aqin Hu; Yafang Li (Expert Syst. Appl., 2025)

Construction and application of a novel grey relational analysis model considering factor coupling relationship. - Aqin Hu; Naiming Xie (Grey Syst. Theory Appl., 2025)