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Inverter control is to enable the inverter output sinusoidal voltage stability, dynamic response, robustness. Uses the current SPWM to control the inverter and design the closed-loop transfer function of system based on ITAE optimal model, get the controller parameters. To control the inverter with the optimized parameters, simulation results show the current inverter SPWM control system can adapt to different load,and verify the correctness of the design parameters. An optimum design method of inverter control system, overcome the blind trial of traditional design method, makes the design of control system greatly simplify, and obtain the optimal dynamic and static performance.

Hospital Information System (HIS) is flourishing vigorously in China, but the hospital information isolated islands, steered by software producers and operated independently in each hospital, have seriously restricted wide popularization and profound reformation of HIS. Nowadays, the integration and interconnection of HISs has become a critical problem we have to face in the digital hospital construction. Based on the software architecture theories and practices, this paper proposes a regional HIS interconnection runtime architecture which is based on Electronic Medical Record (EMR), discusses a EMR conceptual architecture to guide EMR system research and development, and presents a technical architecture to implement open HIS interconnection in a region. The three architectures together provide a comprehensive technology-enriched reference architecture for the new generation of HIS research and development which is loosely coupled, patient-centered and region-oriented.

Open-source software is an enormous treasure of knowledge available to whole mankind which has unique knowledge creation and dissemination mechanisms. In order to promote its usage in China, an open source software repository called OpenCom was designed and implemented as a supporting tool of Shanghai Component Library. OpenCom provides a simple but flexible collaborative platform to describe, store, retrieve, collect and develop open source software. Moreover, OpenCom introduces an extension to Reusable Asset Specification (RAS) to effectively support collaborative creation of knowledge in open source community on the Internet.