1. The high cross regulation flyback switching power supply for PMSM servo system using TOP244Y of TOPSwitch-GX family is designed. The functional block diagram and application circuit are introduced.
用TOPSwitch-GX系列单片开关电源中的TOP244Y型电路设计了一种用于交流永磁同步电动机伺服系统的高交叉调整率的单端反激式多输出辅助开关电源。
2. Sequences analysis showed: S1, M, N gene of strain HaN2-95 all had the highest similarities with that of IBV H120 vaccine strain; S1 gene of strain HaN1-95 had the closest genetic relationship with IBV H52 vaccine strain, while the M, N gene of strain HaN1-95 had the highest similarities with that of strain Gray; although the S1 and M gene of strainGX1-98 all had the highest genetic relationship with that of IBV H52 vaccine strain, yet the N gene of strainGX1-98 had high similarity with that of IBV Ark99 strain or Gray strain; S1 gene ofGX2-98 strain showed the high similarities with that of IBV Holte strain.
序列分析结果表明:HaN2-95株的S1、M和N基因核苷酸序列均与IBV H120疫苗株的同源性最高;尽管HaN1-95株的S1基因与IBV H52疫苗株的亲缘关系最近,但是该毒株的M基