Local Dynamics of Autonomous Van Der Pol–Duffing Circuit System Containing Parallel Resistor

Nonlinear Dynamics of a Modified Autonomous Van Der Pol-duffing Chaotic Circuit

In this work, we investigate the dynamical behaviors of the modi…ed autonomous Van der Pol-Du¢ ng chaotic circuit (MADVP). Some stability conditions of the equilibrium points are discussed. The existence of pitchfork bifurcation is veri…ed by using the bifurcation theory and the center manifold theorem. The occurrences of Hopf bifurcation about the equilibrium points are proved. Conditions for ...

Topological Dynamics and Van der Waerden’s Theorem

گزارش یک مورد سندرم VAN DER WOUDE

van der Waals interaction of simple, parallel polymers.

We study the mutual interactions of simple parallel polymers within the framework of density-functional theory (DFT). As the conventional implementations of DFT do not treat the long-range dispersion [van der Waals (vdW)] interactions, we develop a systematic correction scheme for the nonlocal energy contribution of the polymer interaction at the intermediate to the asymptotic separations. We p...

Synchronization Phenomena in van der Pol oscillators Coupled by a Time-Varying resistor

In this study, synchronization phenomena observed in van der Pol oscillators coupled by a timevarying resistor are investigated. We realize the time-varying resistor by switching a positive and a negative resistor periodically. By carrying out circuit experiments and computer calculations, interesting synchronization phenomena can be confirmed to be generated in this system. Namely, the synchro...