[1]潘文诚,徐鸿飞,李津蓉,等.信号类课程教学中连续与离散的类比性[J].浙江科技大学学报,2012,(04):323. PAN Wen-cheng,XU Hong-fei,LI Jin-rong,et al.Analogy of continuity and discreteness in teaching of signal courses[J].,2012,(04):323.