The decay of weakly swirling flows in a type of cross_section_varying pipes was discussed analytically. For laminar swirling flow, the feature of exponential de
Nonlinear normal modes in a two degrees of freedom asymmetric system with cubic nonlinearities as singularity occurs in the system are studied, based on the inv
Two stochastic models on simple random system with friction were developed.One of them was a discrete model by a two-dimensional mean map applied to describe ra