基于IP网络的无线列调综合告警平台

通过对无线列车调度通信系统广泛使用的监测总机的研究,提出一种基于IP网络平台的综合告警平台,解决目前监测总机使用中存在的报警功能单一、设备分散、操作多样、维护困难等问题.采用服务器、客户端模式,允许多用户同时使用,监测终端可配置到调度工区、通信段、维护工区,实现现场维护人员远程监测使用;增加了短信服务器、邮件服务器等新的报警信息传递方式;具备北向接口,向更高一级的监控系统发送报警信息,使之能适应铁路管理信息化要求.     

基于EPON无源光网络的长大隧道应急通信系统

通过对铁路长大隧道应急通信的研究,提出一种基于EPON无源光网络的应急通信系统,用于铁路长大隧道内的语音、视频图像和数据的传输,解决目前长大隧道应急通信中存在的业务能力弱、抗干扰性差、维护成本高等问题.介绍铁路长大隧道应急系统的组网、站内设备、隧道内光通话柱等相关设备.     

接触网电压低频波动特征研究

基于接触网检测车的电压测量方式,分析典型的接触网电压低频波动现象,采用信号变换、数理统计和小波分析等方法对大量检测数据进行分析,总结接触网电压低频波动的幅值、频率、波动动态过程等特征,为接触网电压低频波动故障诊断提供参考。     

Regression analysis of initial stress field around faults based on fault throw by displacement discontinuity method

The back analysis of initial stress is usually based on measured stress values, but the measuring of initial stress demands substantial investment. Therefore, amounts of underground engineering have no measured initial stress data, such as tunneling engineering. Focusing on this problem, a new back analysis method which does not need measured initial stress data is developed. The fault is assumed to be caused by initial load, the displacement discontinuity method (DDM) which considered non-linear fault is adopted to establish a numerical model of the engineering site, and the multivariable regression analysis of the initial stress field around the faults is carried out based on the fault throw. The result shows that the initial stress field around the faults is disturbed significantly, stress concentration appears in the tip zone, the regressive fault throw matches the measured values well, and the regressive initial stress field is reliable.     

冰雪路驾驶技巧

结冰道路驾驶要领在结冰路上起步,驱动轮容易打滑,因此要做到缓加油,慢抬离合器,以降低驱动轮扭力,适应较小的附着力,防止车轮滑转。如果起步困难,可在驱动轮下铺垫干草、炉渣、沙土等物,实现汽车起步。     

力度之美与阳刚之气的完美结合 试驾建设JS110-9E（X6）

深秋的北京,有一种磅礴大气之美。尽管对建设X6的试驾活动已经顺利进行,但我还是希望能找到一个明媚的秋日去进行最后的拍摄工作,因为这样不仅能凸显＂X6＂的与众不同,而且也非常符合它阳光、帅气的个性。