两种结构的光盘驱动器音圈电机性能分析

介绍了两种光盘驱动器聚焦音圈电机(VCM)的基本结构,探讨了永磁体的性能对电机结构设计的影响,并利用有限元法(FEM)对电机磁场进行了分析比较。     

多杀菌素的液相色谱-质谱分析

The components of spinosad preparation were analyzed by liquid chromatography-mass spectrometry. The results show that the preparation contained spinosad A and spinosad D, their structure was confirmed by multi-mass spectrum.