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Based on knowledge map and bibliometric analysis, this paper uses 1484 Chinese paper in the field of organizational citizenship behavior collected by China Knowledge Network database from 2000 to 2019 as samples, and uses Sati, Ucient and Citespace software for quantitative analysis. Price law, Lotka's law and Bradford's law analysis results show that the research in this field has not formed a core research author group, but a core journal group. In addition, the keyword clustering results also reflect the four main categories of research topics: antecedents, outcomes, dimensions, and behavioral types, while compulsory organizational citizenship behavior is the hot spot and frontier at present and in the future.

Users' behavior is a key effect factor of successful application of IT. However, extant research has focused on the in-role behaviors such as IT adoption and routine IT usage, while the research on users' innovative use of IT which belongs to extra-role behaviors is still limited. Based on the research gap of innovative use of IT at the individual level and work competence theory, this paper analyzed the antecedents of innovative use of IT. Hypotheses are proposed and tested with the data collected by a survey of 156 ERP users. The results show that attitude towards innovation, IT application knowledge, extraversion, and management support have important effects on innovative use of IT at the individual level. Implications of the research results are discussed.

Since the introduction of Electrical Multiple Units (EMUs) to China, traction control technology has become one of the study hotspots. The traction control system of EMUs consists of a traction converter system and a Traction Control Unit (TCU). The traction converter system is composed of a transformer, a four-quadrant pulse rectifier, intermediate DC link, rheostatic chopper, a three phase half bridge inverter and an induction motor. The traction control unit is the brain of the whole system. It controls rectifier, chopper and inverter according to the signals which come from sensors and orders which come from the Center Control Unit (CCU). By reference to the voltage range of the traction system in CRH5, the traction and control system is constructed. And TCU is designed to have hierarchic structure. Then the whole system is simulated. In the system the rectifier is controlled by the theory of transient current control with SPWM (Sinusoidal Pulse Width Modulation) technology. The chopper is used to control filter voltage as a soft crowbar. In the inverter the indirect rotor flux oriented vector control theory with current hysteretic band PWM strategy is adopted. Interface which refers to driver control desk is completed with GUI (Graph User Interface) tool in Matlab. Through the interface EMUs' speed and traction effort are set and the real speed is shown. Both traction control and constant speed control of EMUs are simulated based. The results present that the system has the advantage of good dynamic and steady state performance. And the system is useful for study the performance of the whole system with various control strategies.

The traction converter system of EMU is constructed based on Matlab/Simulink. The system consists of a transformer, a rectifier, an inverter and an induction motor. The rectifier is controlled by the transient current control theory with SPWM technology. In the inverter the indirect vector control theory with current hysteretic band PWM strategy is adopted. Based on the system the traction control and constant speed control are tested. The simulation results present that the system is with good dynamic and steady state performance and fulfill the running demand of EMU.