In order to study discrete fractional Birkhoff equations for Birkhoffian systems,the method of isochronous variational principle is used in this paper. Discrete
To obtain the wound dressings which can accelerate healing effectively,vitamin E D-α-Tocopherol polyethylene glycol succinate(vitamin E TPGS),one of the common
The electrospun nanofibrous scaffolds made of proteins and polysaccharides were thought to be able to simulate the structure of natural extracellular matrix wel