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Due to high-speed rotation, the problems about rotor mechanics and dynamics for outer rotor high-speed machine are more serious than conventional ones, in view of above problems the mechanical and dynamics analysis for an outer rotor high-speed permanent magnet claw pole motor are carried out. The rotor stress analytical calculation model was derived, then the stress distribution is calculated by finite element method also, which is coincided with that calculated by analytical model. In addition, the stress distribution of outer rotor yoke and PMs considering centrifugal force and temperature effect has been calculated, some influence factors on rotor stress distribution have been analyzed such as pole-arc coefficient and speed. The rotor natural frequency and critical speed were calculated by vibration mode analysis, and its dynamics characteristics influenced by gyroscope effect were analyzed based on Campbell diagram. Based on the analysis results above an outer rotor permanent magnet high-speed claw pole motor is design and verified.

Through the analysis of causes of technological lock-in and the use of tools like knowledge map, this essay recommends on how to break away from the technological lock-in for our domestic industry and engages in the design of model related to R&D knowledge management system from the aspect of improving firm's R&D knowledge management level, increasing R&D efficiency and incorporating market information in R&D proceed.

Coal gangue (CG) is one of industrial solid wastes with biggest discharging. The disposal of such a large quantity of this solid waste requires lots of land and many serious environmental problems have been occurred. In this paper, CG as one of cement raw materials, and production experiments were performed in a 5000t•d-1 dry process rotary kiln to calcinations Portland cement clinker. The thermo gravimetric analyses, ash melting point test, X-ray diffraction (XRD), chemical composition of CG were measured. Utilization CG as clay for cement raw meal preparations, and a study was done for calcinations clinkers and test their performance and so on. The results revealed that CG can replace clay for Portland cement. The average output of clinker per day was increased 8.23%, and the usage of the standard coal was decreased 3.94%. The technology reference provide for CG can widely use in cement industry.

Aiming at the difficulties in utilization of fly ash from coal gasification, the physical and chemical properties of fly ash were investigated. This research studied recycling utilization on using fly ash as one of cement raw materials for cement clinker. Results showed that fly ash belongs to ordinary solid waste of siliceous and aluminous materials. Cement clinker could be generated by substituting fly ash for shale with different type limestone. The study not only solves the environment pollution problem caused by piling of fly ash, but also realizes its recycling utilization.