4、thesissimplelyintroducedthediscreteevent systems modelingandsimulationmethodsandestablishedthediscreteevent systemsofBeijingWestRailwayStation.SimulatedandoptimizatedtheprocessofBuyaticket KEYWORDS:discreteevent,systemsimulation.1.概述41.1.售票服务环节研究41.2.离散事件系统41.3.离散事件系统仿真研究现状51.