Mathematical models of steady-state biofilteration are discussed. The theoretical results are much useful for the design of biofilters. This model is based on t
The mass of the neutrino has received considerable attention since the 1930s. In spite of heavy investment of resources, human and material, the problem has rem
From the lifecycle of schistosome, the phenomenon of time delay is widespread. In this paper, a two-dimensional system is studied that incorporates two time del