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2009中国控制与决策会议

作者： Benhai Zhou~1,Jianzhong Qiao~(1,2),Shukuan Lin~(1,2) 1.College of Information Science and Engineering,Northeastern University,Shenyang,Liaoning Province 110004,China 2.Key Laboratory of Software System and Development Generic Technology,Shenyang Liaoning Province,110004,China

＜正＞Nowadays,multi-core processors,which have multiple processing units on a single chip,are becoming mainstream due to their superior performance and power ***,the design of real time system on multi-core processors is being confronted with a new ***,the traditional real time scheduling algorithms,such as EDF and Pfair,easily lead to many tasks missing their deadlines on multi-core processors in overload *** at this problem,a new scheduling algorithm which adopts synthesis parameter judging priority method to extend Pfair scheduling algorithm is *** experiment results show that the deadline miss rate（DMR） of synthesis parameter scheduling algorithm is lower than that of traditional scheduling methods. Consequently,the synthesis parameter scheduling algorithm improves the schedule utilization of real-time tasks and increase real time system performance on multi-core processor effectively.

关键词： multi-core schedule synthesis parameter DMR

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Influence of synthesis parameters on the properties of LiFePO4/C cathode material

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Chinese Journal of Chemical Engineering 2016年第3期24卷 427-432页

作者： Zhengwei Xiao Yingjie Zhang Guorong Hu Faculty of Metallurgical and Energy Engineering Kunming University of Sdence and TechnologyKunming 650093China School of Metallurgy and Environment Central South UniversityChongsho 410083China

The influence of sintering temperature, carbon content and dispersive agent in bail-milling was investigated on the properties of LiFePO4/C prepared using Fe2O3, NH4H2PO4, Li2CO3 and glucose via solid state reaction. X-ray powder diffraction, scanning electron microscopy and charge-discharge test were applied to the characterization of the LiFePO4/C samples synthesized under different conditions. Sintering temperature affects the crystallite/ particle size and degree ofcrystallinity of LiFePO4, formation of Fe2P and maintenance of carbon in LiFePO4/C. Car- bon maintenance is favored by low sintering temperature, and 700 ℃ is optimum for synthesis of LiFePO4/C with superior electrochemical performance. A higher carbon content in the range of 4.48%-11.03% results in a better rate capability for LiFePO4/C. The dispersive agent used in ball-milling impacts the existent state of carbon in the final product which subsequently determines its charge-discharge behavior. The sample prepared at 700 ℃ by using acetone as the dispersive agent in ball-milling exhibits an excellent rate capability and capacity retention without any fade at 0.1 C, 1C and 2C, with corresponding average discharge capacities of 153.8, 128.3 and 121.0 mA·h·g-1. rest2ectivelv, in the first 50 cvcles.

关键词： Composite synthesis parameter Sintering temperature Carbon content Drying Dispersive agent

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