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matrix converter topology were analysed, and then the pulse-width modulation strategy for the rectifier side and the space vector pulse width modulation strategy for the inverter side were deduced...-stage matrix converter. Key words: two-stage matrix converter; pulse width modulation rectification; zero current commutation; space vector modulation; asynchronous motor 随着电力电子技术,微电子技......
: A novel helicopter-borne time-domain airborne electromagnetic transmitting system was proposed. The PWM modulation technology was used to realize the ascending segment and the flat segment... information in deep layers. Key words: airborne electromagnetic; PWM modulation technology; double closed-loop; line locking 直升机时间域电磁法(HTEM)是一种以直升机作为载体,并在飞行过程中完成勘探的资源探测方法[1].其原理是通过在吊舱上的发射线圈中供以几百安的大发射电流,在空间内建立起......
Modulation of active Cr(III) complexes by bath preparation to adjust Cr(III) electrodepositionLei Li1,2,Zhi Wang1,Ming-yong Wang1,Yi Zhang11. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering, Chinese Academy of Sciences2. College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences摘 要:
Phosphorus-doped Fe7S8@C nanowires for efficient electrochemical hydrogen and oxygen evolutions: Controlled synthesis and electronic modulation on active sitesThanh-Tung Le1,Xiao Liu1,Peijun Xin1,Qing Wang1,Chunyan Gao1,Ye Wu1,Yong Jiang1,Zhangjun Hu1,2,Shoushuang Huang1,Zhiwen Chen11. School of Environmental and Chemical Engineering, Shanghai University2. Department of Physics, Chemistry......
ARTICLE J. Cent. South Univ. (2019) 26: 1449-1457 DOI: https://doi.org/10.1007/s11771-019-4101-z Structural modulation of anthraquinone with different functional groups and its effect...-hua, LUO Yi-fan. Structural modulation of anthraquinone with different functional groups and its effect on electrochemical properties for lithium-ion batteries [J]. Journal of Central South University......
under different radial pressures. Effects of radial pressure on the thickness distribution were discussed and optimal radial pressure was determined. It is shown by numerical simulations... and thickness distribution is more uniform. Key words: aluminum alloy; hydroforming; radial pressure; fracture; thickness ......
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Effects of PyC shell thickness on the microstructure, ablation resistance of SiCnws/PyC-C/C-ZrC-SiC compositesQinchuan He1,Hejun Li2,Xuemin Yin2,Jinhua Lu21. College of Materials and Chemistry.../pyrocarbon(SiCnws/PyC) core-shell structure toughenedC/C-ZrC-SiC composites were fabricated by CLVD process, and the influences of PyC shell thickness on the microstructure and ablation resistance......
loads and the first buckling modes with those obtained through theoretical analysis. Two typical initial defects, non-circularity and uneven thickness distribution, were studied. Critical loads decline... cylindrical shell is under torsion. Unfortunately, it has a completely different buckling mode when cylindrical shell is under axial compression. Critical loads decline with the increase of thickness defect......
Effects of Thickness on the Electrical Conductivity of Sputtered YSZ Film with Nanocrystalline Columnar Microstructure杨青青,LIN Zuoliang,孟彬,ZHU Xinkun,YANG Feng,WU ShanFaculty of Materials Science & Engineering, Kunming University of Science & Technology摘 要:In order to investigate the effect of the thickness on the electrical conductivity......
