different regions of a country generally have different levels of agricultural development. in fact, there is a kind of heterogeneity that makes the investigation of the agricultural development trends in provinces of the country undeniable. the present article aims to analyze the level of agricultural development and its imbalance in rural regions of west azerbaijan for urban levels in 2000s. ...

Economic and social changes in recent decades led to regional imbalance and inordinate concentration of facilities in some parts and bereavement of other parts. We need to district and regional planning which its objective is providing an appropriate model for balanced distribution of services according to population of settlements or spatial balance in the region. The topics of sust...

We investigate forced synchronization between electrically coupled Morris–Lecar neurons with class I and class II excitability through numerical bifurcation analysis. We find that class II neurons have wider parameter regions of forced synchronization. However, the bifurcation structure and patterns of spikes for class II are complicated; there exist period-doubling bifurcations, interesting tw...

We propose a singular nonlinear partial differential equation (PDE), which describes the evolution of the risk preference in the optimal investment problem under the random risk process. The quantity is related to the Arrow-Pratt coefficient of relative risk aversion with respect to the optimal value function. We prove an existence theorem for this PDE.