The data compession technology is researched , and the problem is solved which quanties of fault recording data are huge and the sending time is long . the transmission success ratio is boroved greatly . the electrical relation of single phase - earth fault of generator stator windings is ndied in detail , and the process of generator losing magnetism faul is also discussed 利用该标准记录数据中的冗余量,进行压缩是一新思路,对无损压缩和有损压缩进行了大量仿真,采用信号源符号1byte的自适应二阶算术编码无损压缩法,使远传数据压缩率可达72 ,解决了录波数据远传中数据量大、传送时间长、成功率低的难题。
Abstract : on the basis of a study of sequence stratigraphy , with the systems tract and related boundaries as the mapping unit and using the systems tract condensation method and instantaneous map production method , the authors have compiled the permian sequence paleogeographic map of southwestern china and systematically elucide the characteristics of the permian sequence paleogeographic evolution of the region 文摘:在层序地层研究成果基础上,以沉积体系域和相关界面为编图单元,采用体系域压缩法和瞬时编图法,编制了西南地区二叠纪层序古地理图,全面系统地阐述了该区二叠纪层序古地理演化特征。