This work presents a novel evolutionary computation-based Padé approximation (EPA) scheme for constructing a closed-form approximate solution of a nonlinear dynamical model of Covid-19 disease with a crowding effect that is a growing trend in epidemiological modeling. In the proposed framework...

Graphitic carbon nitride (g-C3N4) shows a graphite-like layered structure, which provides a high theoretical value for solar-to-hydrogen evolution especially for a 2D nanostructure. However, conventional polycondensation induces a strong agglomeration and collapse of nanostructure, resulting in...

By analyzing firm-level panel data, we study the effect of the legal minimum wage on the quality of export products in China. The results show that the minimum wage increase significantly improves export quality by encouraging enterprises to employ a more significant proportion of additional...