Power-Split Hybrid Train Configuration Design Based on a Single-Row Star Row

The fundamental component of a hybrid train system is the hybrid power-coupling mechanism. This paper proposes a single-row star-row power-split arrangement for the power-coupling method in a hybrid train. In order to create input and output power-split configuration schemes for a hybrid train power mechanism, a graphical–theoretical model and a relationship matrix were first established. An electromechanical path power proportion equation was then established to filter out two input power-split configurations. The working states of three developed hybrid power-coupling mechanism schemes were studied to find the scheme that fulfills hybrid train design criteria to meet the power, operating mode, and spatial structural arrangement requirements. Finally, by creating a simulation model for the entire vehicle, the dynamics, battery state of charge (SOC) value, and overall vehicle efficiency for the configuration were simulated and examined. The findings demonstrate that the single-row star-row power-split design technique presented here significantly enhances the train performance

Study of the Mechanisms of the Electrochemical Reactions of the Soluble Polyimides

本文研究了三种可溶性聚酰亚胺（ＰＩ）在有机溶剂和水溶液中的电化学行为，发现ＰＩ在有机溶剂中的电化学行为明显不同于水溶液．利用红外光谱技术和半经验分子轨道计算方法，结合电化学测试的结果，确证了ＰＩ的电化学反应的机理．For the first time, the electrochemical behaviors of the three soluble polyimides were studied in the organic and aqueous solutions. It was found that the electrochemical behaviors of PI in the organic solutions are significantly different from that in the aqueous solution. Using the IR spectroscopy and semiempirical molecular orbital calculation and combining the results of the electrochemical measurements, the mechanisms of the electrochemical reactions of polyimides were demonstrated.作者联系地址：中国科学院长春应用化学所,南京师范大学化学系Author's Address: Changchun Inst. of Appl. Chem.Yang Hui Lu TianhongDept. of Chem., Nanjing Normal Univ., Nanjing 21009