Single-atom catalysts with M–N4 configurations have been highly investigated due to their great potential in oxygen electrocatalysis. However, their pr...
BACKGROUND Perforated peptic ulcer(PPU)is a common emergency surgical condition and a significant cause of morbidity and mortality worldwide.While advan...
Taking Danzhai County, Qiandongnan Miao and Dong Autonomous Prefecture, Guizhou Province as an example, this paper uses entropy method to explore the de...