The activation effect of Zn2+ modification, including enhancement of emission intensity, slowing of luminescence decay and increasing of quantum yields, results from the formation of ZnS shell outside the nanoparticles, which is passivating the surface of nanoparticles, eliminating the surface quenching centers, so as to block the nonradiative transi.

Under a series work conditions, the quenching diameters and self-stability ranges of natural gas combustion in ceramics foam were determined experimentally, which might provide a guideline for the development and design of the porous media burners.

Based on the Double Grid Air Counter(DGDC)of the smart sensor system,this paper studies the process of the air counter,which reachs working time sequence,range and width algorithm of the quenching voltage are proposed,and prohibitive voltage,and then designs control circuits based on quenching circuit and prohibitive circuit.