The Formal Representation of Semantic on Stratum Attribute Data Oriented 3D Geo-Modeling. - Lei Xu 011; Lixin Wu; Defu Che; Zhenfeng Cai (IGARSS, 2006)

Quaternion Scalar and Vector Norm Decomposition: Quaternion PCA for Color Face Recognition. - Wankai Liu; Kit Ian Kou; Jifei Miao; Zhenfeng Cai (IEEE Trans. Image Process., 2023)