College English is a general compulsory course which lasts longest in the period of higher education. It means that College English teachers are the ones who contact with their students most often and influence their ...College English is a general compulsory course which lasts longest in the period of higher education. It means that College English teachers are the ones who contact with their students most often and influence their students most deeply. Every teacher bears the responsibility of teaching and educating, and moral education should be integrated into College English teaching. College English teachers should have strong consciousness of professional ethics, explore the ideological content of teaching materials, design teaching procedures, and guide students to have ideological journeys of some familiar daily life or some influential social events with flexible teaching methodologies.展开更多
In this paper, the asymptotic stability of Port-Hamiltonian (PH) systems with constant inputs is studied. Constant inputs are useful for stabilizing systems at their nonzero equilibria and can be realized by step sign...In this paper, the asymptotic stability of Port-Hamiltonian (PH) systems with constant inputs is studied. Constant inputs are useful for stabilizing systems at their nonzero equilibria and can be realized by step signals. To achieve this goal, two methods based on integral action and comparison principle are presented in this paper. These methods change the convex Hamiltonian function and the restricted damping matrix of the previous results into a Hamiltonian function with a local minimum and a positive semidefinite matrix, respectively. Due to common conditions of Hamiltonian function and damping matrix, the proposed method asymptotically stabilizes more classes of PH systems with constant inputs than the existing methods. Finally, the validity and advantages of the presented methods are shown in an example.展开更多
文摘College English is a general compulsory course which lasts longest in the period of higher education. It means that College English teachers are the ones who contact with their students most often and influence their students most deeply. Every teacher bears the responsibility of teaching and educating, and moral education should be integrated into College English teaching. College English teachers should have strong consciousness of professional ethics, explore the ideological content of teaching materials, design teaching procedures, and guide students to have ideological journeys of some familiar daily life or some influential social events with flexible teaching methodologies.
基金supported by the National Nature Science Fund of China(No.61603311).
文摘In this paper, the asymptotic stability of Port-Hamiltonian (PH) systems with constant inputs is studied. Constant inputs are useful for stabilizing systems at their nonzero equilibria and can be realized by step signals. To achieve this goal, two methods based on integral action and comparison principle are presented in this paper. These methods change the convex Hamiltonian function and the restricted damping matrix of the previous results into a Hamiltonian function with a local minimum and a positive semidefinite matrix, respectively. Due to common conditions of Hamiltonian function and damping matrix, the proposed method asymptotically stabilizes more classes of PH systems with constant inputs than the existing methods. Finally, the validity and advantages of the presented methods are shown in an example.
