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一种无互联线并联的辅助变流器新启机方法 被引量:4
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作者 杨二林 董侃 马颖涛 《机车电传动》 北大核心 2019年第3期29-32,共4页
在高速动车组和城市轨道车辆实际运用中,多台辅助变流器的启机并网是一个关键技术问题,主要涉及到列控系统启机逻辑、启机时序和辅助变流器启机方法。为解决当前工程应用中多台辅助变流器的启机冲突问题,缩短辅助系统启机时间,降低列控... 在高速动车组和城市轨道车辆实际运用中,多台辅助变流器的启机并网是一个关键技术问题,主要涉及到列控系统启机逻辑、启机时序和辅助变流器启机方法。为解决当前工程应用中多台辅助变流器的启机冲突问题,缩短辅助系统启机时间,降低列控系统对辅助变流器启机控制的难度,提出一种辅助变流器新启机方法。通过合理设计启机逻辑和优化控制策略,可以改进传统辅助变流器启机控制方法的不足,最后进行了试验验证,证明该启机方法可行有效。 展开更多
关键词 辅助变流器 启机方法 并联控制 高速动车组 城市轨道车辆
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Research on methods of designing and building digital seabed database 被引量:1
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作者 苏天贇 Liu Baohua +3 位作者 Zhai Shikui Liang Ruicai Zheng Yanpeng Fu Qiang 《High Technology Letters》 EI CAS 2007年第2期177-183,共7页
With a review of the recent development in digitalization and application of seabed data, this paper systematically proposed methods for integrating seabed data by analyzing its feature based on ORACLE database manage... With a review of the recent development in digitalization and application of seabed data, this paper systematically proposed methods for integrating seabed data by analyzing its feature based on ORACLE database management system and advanced techniques of spatial data management. We did research on storage structure of seabed data, distributed-integrated database system, standardized spatial database and seabed metadata management system in order to effectively manage and use these seabed information in practical application. Finally, we applied the methods researched and proposed in this paper to build the Bohai Sea engineering geology database that stores engineering geology data and other seabed information from the Bohai Sea area. As a result, the Bohai Sea engineering geology database can effectively integrate huge amount of distributed and complicated seabed data to meet the practical requisition of Bohai Sea en-gineering geology environment exploration and exploitation. 展开更多
关键词 digital seabed DATABASE spatial data engine (SDE) ORACLE
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