Identification of the Shaft-Rate Electromagnetic Field Induced by a Moving Ship Using Improved Learning-Based and Spectral-Direction Methods. - Shuanggui Hu; Liang Zhang; Jingtian Tang; Guang Li; Haiyan Yang; Zhenhuan Xu; Lincheng Zhang; Jingnian Xiang (IEEE Trans. Geosci. Remote. Sens., 2024)