at railway speed

The net profit of Beijing-Shanghai High-Speed Railway Co. Ltd. ( BSHSR) surged at an annual average of 39.4 percent between 2014 and 2019.

2014年至2019年，京沪高铁净利润年均增幅高达39.4%。

High-speed camera array is placed at the side of railway track to take image of train key components, so train inspector can identify train component fault from the image taken. The system makes the way of train inspection shifted from field operation to room operation.

该系统通过布置于铁轨边的高速摄像机阵列，拍摄列车关键部件图像，列检员从图像中分辨列车部件的故障，使得列检方式由现场作业转向了室内作业。

For the moment, the sliding plug door type has been widely used for the door system of main line railway train at home and abroad. By entering the era of high speed train, the tightness of the door system becomes one of its key indices.

目前国内外干线轨道车辆门系统主要采用塞拉门形式，随着进入高速车时代，其密封性成为门系统的关键指标之一，塞拉门密封技术的研究具有重大现实意义。

At the same time in the rapid development of high-speed railway, these matters about the train safety, vehicle fault diagnosis accuracy or rapidity and accuracy on repairing train fault, become more important and draw great attention from public people.

在高速铁路迅速发展的同时，随之而来的列车安全性、列车故障诊断、列车故障修复等问题变得十分重要，受到了广泛的关注。

In light of sound exposure level for high-speed railway at 15 m from track center, a theoretical model for noise analysis is established by introducing ground attenuation, shielding attenuation and excess attenuation from buildings and trees.

根据离开轨道中心15m处高速铁路的噪声暴露声级，通过引入地面衰减、屏障衰减和房屋建筑及树木的附加衰减参数，建立噪声理论分析模型。

The 21st century is a rapid development century about digitized and informationization. It takes on so many multimedia services that the traffic in the network grows at railway speed.

21世纪是数字化、信息化飞速发展的一个世纪，各种多媒体业务的纷纷呈现，最终导致了网络通信量的爆炸式增长，这就必然要求扩大广域骨干通信网的容量。

Aimed at the two types of high speed railway long span steel bridge-slab truss composite system and arch truss composite system, an analysis of random vibration response of time dependant train bridge system has been made in detail.

本文针对高速铁路大跨度钢桥板桁或拱桁组合体系两种主要桥式，对列车与桥梁时变系统的随机振动响应作了较详细的分析。