However, the perishability of goods is a realistic phenomenon.
The linearity of the diffusion term, however, is not always appropriate to model a realistic phenomenon.
When representing realistic physical phenomena by partial differential equations (PDE), it is crucial to approximate the underlying physics correctly, to get precise results, and to efficiently use the computer architecture.
A virtual world may produce semi-realistic lighting phenomena, however, precisely perceiving illuminance and glare of scenes in HMD is impossible with the current technology.
The methodology presented in this paper paves ways for more realistic drought phenomenon spatial probability of occurrences when the sub-areal dry spell probabilities are dependent on each other but heterogeneous.
Results reveal that incorporation of the realistic heat generation phenomenon leads to remarkably higher local stresses; a fact that has to be considered in the design stage.
More importantly, one should note the qualitative changes in the shapes of the cross-sections of the stability region from concave to convex when the more realistic partial interference phenomenon is considered.
Unlike linear car-following models, nonlinear models generally can generate more realistic traffic oscillation phenomenon, but nonlinearity makes analytical quantification of oscillation characteristics (e.g, periodicity and amplitude) significantly more difficult.
The possible occurrence of these phenomena for realistic parameter values is considered.
Differential equations involving fractional derivatives in time are more realistic to describe many phenomena in practical cases than those of integer order in time.
