双流制供电线路变压器直流偏磁问题研究 LI Xuefei, SUN Wenbin, GUAN Chao, DAI Jun,LIU WeiUrban Mass Transit(2025)引用 0|浏览1关键词rail transit,dual current line,transformer DC bias currentAI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要