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; 文献标志码:A 文章编号:1672-7207(2010)06-2246-06 A novel passive lossless high power factor rectifier based on one cycle control ZHANG Hou-sheng, ZHAO Yan-lei (College of Electrical & Electronic Engineering, Shandong University of Technology, Zibo 255049, China) Abstract: A novel high power factor rectifier......
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of tartaric ester from 0 to 0.3 mol/L, partition coefficient K and separation factor α increase. Also, the kind of organic solvent and the concentration of the methanol aqueous have significant influence on K and α. Key words: chiral extraction; ketoprofen; enantiomer; tartaric ester; partition coefficient; separation factor  ......
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Boost PFC变换器快时标分岔分析及其双积分滑模控制 郑连清,鲁思男,申滔,陆治国 (重庆大学 输配电装备及系统安全与新技术国家重点实验室,重庆,400044) 摘要:为了分析峰值电流型Boost PFC(power factor correction)在快时标下的非线性现象,建立Boost PFC变换器的离散迭代映射,并基于此映射推导其状态转移矩阵的表达式,得到系统分岔的条件,通过仿真观察... external disturbance, and avoid bifurcations caused by variation of the input voltage effectively, which can also attain high power factor (PF) with simple algorithm. The new method is easy to realize......
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. The partition coefficient, separation factor and recovery rate were used to evaluate the effects of MMT, and the selection factor was primarily proposed to define the selectivity of mine gas hydrate in the relative target gases. The experimental results indicate that MMT could improve the following factors including hydration separation factor, the selection factor, the partition coefficient, and the recovery......
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of signal to noise ratio (SNR), the method of extracting multi-scale wavelet entropy features of wavelet coefficients from different received signals were combined with calculating uneven weight factor and stability weight factor of the extracted multi-dimensional characteristics. Radar emitter signals of different modulation types and different parameters modulated were recognized through feature......
from considering the similarity of basic sub-behaviors, order factor was proposed to measure the similarity of a time order among the sub-behaviors and span factor was used to measure the similarity... with other related works and can run in real-time for the recognition of suspicious behaviors.Key words:visual attention mode; case-based reasoning; suspicious behavior; order factor; span factor......