Abstract:By referring to the idea of weight fitting, inequality constraints are added to the integral rotation of regional crustal movement and the Euler vector part of the linear strain model. The Euler parameters of the regional crustal movement are constrained to the vicinity of the average Euler parameter value determined by the multi-year observation data. An overall rotation and linear strain model with inequality constraints is established. The fitting analysis of the velocity field data of recent GPS observations from crustal movement observation network of China in Bohai rim region shows that the proposed method enhances the smoothness of the overall motion trend of the block, with higher fitting accuracy to the velocity field as well as further enhanced physical interpretation ability of the model.
FAN Chengcheng,ZHANG Jun,LEI Qiankun et al. RELSM Model with Additional Inequality Constraints on Euler Vectors and Its Application[J]. jgg, 2020, 40(7): 667-670.