As a crucial component in Cogni-tive Radio (CR) networks, spectrum sensing has been attracting lots of attention. Some conventional methods for spectrum sensing
On March 30,2015 the first in the world naphtha adsorptive separation unit had passed the calibration tests at the Yangzi Petrochemical Company(YPC).This calibr
In this paper, four kinds of polymethacrylates (PMAs) used as multifunctional additives were synthesized from quatary C1—C14 methacrylate, among which sample 4