TRDP(Train Real Time Data)协议作为IEC61375-2-3标准指定的设备间各个系统进行通信的协议,在列车控制与信息服务网络(Train Control and Service Network,TCSN)得到了广泛的应用。由于TRDP协议是轨道交通私有协议,目前Wireshark软件对...TRDP(Train Real Time Data)协议作为IEC61375-2-3标准指定的设备间各个系统进行通信的协议,在列车控制与信息服务网络(Train Control and Service Network,TCSN)得到了广泛的应用。由于TRDP协议是轨道交通私有协议,目前Wireshark软件对TRDP协议析解析尚不支持。通过对TRDP协议进行分析,利用Qt读取Excel通信协议文件,自动化生成适用于TRDP协议解析的Lua代码插件,实现在Wireshark中对TRDP协议的识别以及对报文头首部、数据区协议内容解析,同时实现了对TRDP报文的丢包检测、周期分析功能,可以广泛应用于子系统通信之间数据一致性测试及现场列车通信调试。展开更多
实时以太网逐渐成为列车网络控制系统的主流技术,但目前以太网车型的单车网络调试工艺还不成熟,现场工作人员操作难度大,调试效率较低。介绍了列车实时数据协议TRDP(Train Real-Time Data Protocol)的通信原理,通过分析调试现场的实际需...实时以太网逐渐成为列车网络控制系统的主流技术,但目前以太网车型的单车网络调试工艺还不成熟,现场工作人员操作难度大,调试效率较低。介绍了列车实时数据协议TRDP(Train Real-Time Data Protocol)的通信原理,通过分析调试现场的实际需求,设计了一种应用于以太网车型的单车网络调试软件,包括用户登录、数据库交互、TRDP通信等功能模块以及简明清晰的人机接口界面,优化了调试流程。测试表明,上位机软件可以与车载网络建立稳定的连接,有效地帮助工作人员及时排查故障,提高调试效率。展开更多
在VxWorks操作系统下对TRDP协议栈移植遇到的问题进行分析与解决,介绍了在TRDP(Train Real-time Data Protocol)应用过程中遇到数据发送失败时的应对方法,最后指出了目前VxWorks 6.5版本FTP组件中普遍存在的后门问题。经过两年的验证,...在VxWorks操作系统下对TRDP协议栈移植遇到的问题进行分析与解决,介绍了在TRDP(Train Real-time Data Protocol)应用过程中遇到数据发送失败时的应对方法,最后指出了目前VxWorks 6.5版本FTP组件中普遍存在的后门问题。经过两年的验证,超20万公里运用考核,在机车车辆网络控制系统中应用该协议栈所遇到的问题及其解决方法,可以证明移植成功,方法可靠,值得推广。展开更多
Capillary chromatography using an untreated open tubular capillary tube and a ternary solvent mixture consisting of water-hydrophilic/hydrophobic organic solvent as a carrier solution has been developed. The system is...Capillary chromatography using an untreated open tubular capillary tube and a ternary solvent mixture consisting of water-hydrophilic/hydrophobic organic solvent as a carrier solution has been developed. The system is called tube radical distribution chromatography (TRDC). Separation performance of the TRDC system using a fused-silica capillary tube was examined through the phase diagram for the ternary water-acetonitrile-ethyl acetate solvent mixture. The TRDC system required homogeneous carrier solutions with solvent component ratios around the boundary curve between homogeneous and heterogeneous solution in the phase diagram. The data obtained using the fused-silica capillary tube were compared with those obtained using a polytetrafluoroethylene capillary tube in our previous study.展开更多
Microfluidic behavior of ternary mixed carrier solvents of water-acetonitrile-ethyl acetate (2:3:1 volume ratio) was examined by use of a microchip incorporating microchannels in which one wide channel was separated i...Microfluidic behavior of ternary mixed carrier solvents of water-acetonitrile-ethyl acetate (2:3:1 volume ratio) was examined by use of a microchip incorporating microchannels in which one wide channel was separated into three narrow channels, i.e., triple-branched microchannels. When the ternary carrier solution containing the fluorescent dyes, hydrophobic perylene (blue) and relatively hydrophilic Eosin Y (green), was fed into the wide channel under laminar flow conditions, the carrier solvent molecules or fluorescence dyes were radially distributed in the channel, forming inner (organic solvent-rich major;blue) and outer (water-rich minor;green) phases in the wide channel. And then, in the narrow channels, perylene molecules mostly appeared to flow through the center narrow channel and Eosin Y, which is distributed in the outer phases in the wide channel, flowed through the both side narrow channels. A metal ion, Cu(II) as a model, dissolved in the ternary mixed carrier solution was also examined. The Cu(II) showed fluidic behavior, transferring from the homogeneous carrier solution to the water-rich solution in the side narrow channels through the triple-branched microchannels.展开更多
文摘TRDP(Train Real Time Data)协议作为IEC61375-2-3标准指定的设备间各个系统进行通信的协议,在列车控制与信息服务网络(Train Control and Service Network,TCSN)得到了广泛的应用。由于TRDP协议是轨道交通私有协议,目前Wireshark软件对TRDP协议析解析尚不支持。通过对TRDP协议进行分析,利用Qt读取Excel通信协议文件,自动化生成适用于TRDP协议解析的Lua代码插件,实现在Wireshark中对TRDP协议的识别以及对报文头首部、数据区协议内容解析,同时实现了对TRDP报文的丢包检测、周期分析功能,可以广泛应用于子系统通信之间数据一致性测试及现场列车通信调试。
文摘实时以太网逐渐成为列车网络控制系统的主流技术,但目前以太网车型的单车网络调试工艺还不成熟,现场工作人员操作难度大,调试效率较低。介绍了列车实时数据协议TRDP(Train Real-Time Data Protocol)的通信原理,通过分析调试现场的实际需求,设计了一种应用于以太网车型的单车网络调试软件,包括用户登录、数据库交互、TRDP通信等功能模块以及简明清晰的人机接口界面,优化了调试流程。测试表明,上位机软件可以与车载网络建立稳定的连接,有效地帮助工作人员及时排查故障,提高调试效率。
文摘在VxWorks操作系统下对TRDP协议栈移植遇到的问题进行分析与解决,介绍了在TRDP(Train Real-time Data Protocol)应用过程中遇到数据发送失败时的应对方法,最后指出了目前VxWorks 6.5版本FTP组件中普遍存在的后门问题。经过两年的验证,超20万公里运用考核,在机车车辆网络控制系统中应用该协议栈所遇到的问题及其解决方法,可以证明移植成功,方法可靠,值得推广。
文摘Capillary chromatography using an untreated open tubular capillary tube and a ternary solvent mixture consisting of water-hydrophilic/hydrophobic organic solvent as a carrier solution has been developed. The system is called tube radical distribution chromatography (TRDC). Separation performance of the TRDC system using a fused-silica capillary tube was examined through the phase diagram for the ternary water-acetonitrile-ethyl acetate solvent mixture. The TRDC system required homogeneous carrier solutions with solvent component ratios around the boundary curve between homogeneous and heterogeneous solution in the phase diagram. The data obtained using the fused-silica capillary tube were compared with those obtained using a polytetrafluoroethylene capillary tube in our previous study.
文摘Microfluidic behavior of ternary mixed carrier solvents of water-acetonitrile-ethyl acetate (2:3:1 volume ratio) was examined by use of a microchip incorporating microchannels in which one wide channel was separated into three narrow channels, i.e., triple-branched microchannels. When the ternary carrier solution containing the fluorescent dyes, hydrophobic perylene (blue) and relatively hydrophilic Eosin Y (green), was fed into the wide channel under laminar flow conditions, the carrier solvent molecules or fluorescence dyes were radially distributed in the channel, forming inner (organic solvent-rich major;blue) and outer (water-rich minor;green) phases in the wide channel. And then, in the narrow channels, perylene molecules mostly appeared to flow through the center narrow channel and Eosin Y, which is distributed in the outer phases in the wide channel, flowed through the both side narrow channels. A metal ion, Cu(II) as a model, dissolved in the ternary mixed carrier solution was also examined. The Cu(II) showed fluidic behavior, transferring from the homogeneous carrier solution to the water-rich solution in the side narrow channels through the triple-branched microchannels.
