6Zhongmin Chen, Naxin Wang, Xiaoping Song, et.al.The multipho- non relaxation and Judd-Ofeh theory analysis of Dy3" doped C, eS2- Ga2S3-CsI glass[J]. Appl. Phys,1993,74:3 596.
7Yan Gaolin, AJ. Williams, J. P. G. Fart, et.al.Adaptive Neural Con- trol of Permanent Magnet Synchronous Motor with Variable Load [J]. Alloys and Comp, 1999,292:266.