By analyzing the condition of passenger transfer in Guangzhou metronetwork, this paper sums up the exprieneces of passenger transfer mode of modern city, and made some advice.
The architecture of metro optical network, networking principles and the selection of optical fiber cable are discussed in accordance with metronetwork positioning and function.
根据城域网的定位及作用，对城域光网络的结构、组网原则和光纤选用等问题进行了讨论。
3
The Paris metro is considering digging anti-suicide trenches or fitting warning radar in its 380 stations in an effort to reduce the number of people who try to kill themselves on the network.