e-phase unitypower-factor star-connected switch rectifier with unified constant-frequency integration control. ieee transactions on power electronics, 2003,18 （4）：952~957 4 smedley k m, slobodan cuk .one-cycle control of switching converters. the 22nd ieee power electronics specialists conference, massachusetts, usa, 1991 :888 ~896 5 张占松，蔡宣。三开关电源的原理与设计。第1 版。北京：电子工业出版社，1998 6 jin taotao qiao chongming, smedley k m operation of unified constant-frequency integration controlled three-phase act
sitive film) essential for future application of euv (extreme ultraviolet) lithography in semiconductor fabrication, and proved its viability with the world's first 20nm-scale generation process technology. this achievement will be announced at 22nd international microprocesses and nanotechnology conference on november 19. as semiconductor process technology advances and wiring densities get even higher, use of conventional polymer photoresists-the base materials for conventional semicondu
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