It is a challenging issue to characterize the evolution of diffusibility, which causes some complex diffusion. For the clear physical significance in some parameters of the existing fractional diffusion models, we present a modified fractional diffusion model and then establish the fractional...

Economic Impact of COVID-19 Pandemic / Cai Fang -- Its Impact on "Agriculture, Rural areas and Farmers" and Countermeasures / Li Xuesong, Wang Hongju, Feng Ming, Li Shuangshuang and Zhang Binbin -- The Impact of the COVID-19 Pandemic on China's Industrial Economy and Countermeasures / Wei...