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24 M X =G=1 non-preemptive priority queue with bulk arrivals has already been analysed in 25 many papers. Two problems are known in this area: first, when the number of priorities 26 is greater than 2, the analysis for priority processes is obviously very difficult to handle. 27 Therefore, the earlier work on the subject was restricted mostly to two(More)
A series of ZnO-CdS-Ag2S ternary nanostructures with different amounts of Ag2S were prepared using simple and low-cost successive ionic layer adsorption and reaction (SILAR) and a chemical precipitation method. The ZnO nanowires, with a diameter of ∼ 100 nm and a length of ∼ 1 μm, were modified by coating CdS and Ag2S. CdS has a high absorption coefficient(More)
ZnO nanorod/porous silicon nanowire (ZnO/PSiNW) hybrids with three different structures as highly sensitive NO2 gas sensors were obtained. PSiNWs were first synthesized by metal-assisted chemical etching, and then seeded in three different ways. After that ZnO nanorods were grown on the seeded surface of PSiNWs using a hydrothermal procedure. ZnO/PSiNW(More)
This work presents a new method to improve the field emission (FE) properties of semiconductors decorated with low-cost graphene oxide (GO) nanosheets and trace amounts of noble metal. The Ag/GO/ZnO composite emitter exhibited efficient FE properties with a low turn-on field of 1.4 V μm(-1) and a high field enhancement factor of 7018. The excellent FE(More)