期刊名称：International Journal of Differential Equations
印刷版ISSN：1687-9643
电子版ISSN：1687-9651
出版年度：2014
卷号：2014
DOI：10.1155/2014/430951
出版社：Hindawi Publishing Corporation
摘要：We have studied the periodicity of solutions of some
nonlinear time-varying differential models by using the theory of reflecting functions. We have established a new relationship between the linear differential system and the Riccati equations and applied the obtained results to discuss the behavior of periodic solutions of the Riccati equations.
