并列题名：Variational principles with mixed variables in elasticity and their applications Variational principles with mixed variables in elasticity and their applications Quasi-variational principles of non-conservative system and their applications 并列题名：Quasi-variational principles of non-conservative system and their applications Dimension reduction, variable selection and their applications 并列题名：Principles of nonlinear kalman filters and their applications theory, variational principles, numerical methods, and applications 并列题名：An introduction to variational inequalities and their applications 并列题名：Computational methods for inverse problems and their applications