The author considers a three-species ratio-dependent predator-prey model with time delay in a two-patch environments. This model is of periodic coefficients, wh
Pulse vaccination is an effective and important strategy to eradicate an infectious disease. The authors investigate an SEIRS epidemic model with two delays and
An empty spot refers to an empty hard-to-fill space which can be found in the records of the social interaction, and is the clue to the persons in the underlyin
The authors extend the Gazi’s swarm model with local neighbor rules and the dynamic communication topology, and study its aggregation properties. Results of an
Exponential stability of the first order singular distributed parameter systems is discussed in the light of degenerate semi-group methods, which is described b
Intational Environmental Agreements (IEAs) are a form of cooperation ratified by countries which can improve the management of shared environmental resources. T