However, even if some of the prior researches had approved that both the proximal duration and distal duration can influence listeners to distinguish the sound, there are fewer investigation to confirm the similar regulations among differen...

本文的射频系统的研究意义和价值，本文先将市面普遍应用的用于出入口进出的射频系统做简要介绍。一般的射频系统由门禁控制器、射频读卡器、IC 片、电控锁、射频软件、电源和其...

目前常用的射频自动识别技术中，条码磁卡的成本较低，但都容易磨损，且数量很小；接触式IC卡的价格高，数据的存储容量较大，安全性好，但也容易磨损，寿命短;而射频实现免接触...