This paper introduces an interactive system of sight-singing and ear-training which combines the technology of single ch......

In this paper, the problem of channel estimation for superposition coded modulation-orthogonal frequency division multip......

本文重点探讨连锁超市企业供应链管理（SCM）中的价值网构建问题。研究发现，在当前金融危机形势下，构建和谐价值网是本土连锁超市企业抵......