Sulfonated poly(ether ether ketone ketone)(SPEEKK) membranes with different degrees of sulfona-tion(DS) were successfully prepared via electrospinning method.Th
In this paper,we study the issue of admissibility in the growth curve model with respect to restricted parameter sets under matrix loss function.We obtain some
A facile and efficient method for the preparation of 2-non-substituted quinoline-4-carboxylic acids is described via the Pfitzinger reaction of isatins with sod
This paper constructs a comprehensive evaluation index system for the urbanization level in China in terms of four aspects of urbanization connotation: populati