In this paper, the piezoelectric pressure sensor (PPS) with a sandwich structure for human joint monitoring was prepared by electrospun polyvinylidene fluoride (PVDF) membranes. The electrospinning method can transform the α-phase to β-phase in PVDF matrix effectively. The effects of GO on the...

In view of the characteristics of north Anhui Province, an index system was constructed for evaluating the development level of circular economy according to relevant principles, Principal Component Analysis and Analytic Hierarchy Process were adopted to evaluate the circular economic...