关键词: 聚酰亚胺（PI）, 氟掺杂, 紫外吸收, 含时密度泛函理论, 激发态

Abstract: The application of cloud computing technology in the network technology has changed the operation of computer training teaching pattern. Considering on the situation of computer training course，this paper put forward the operation cloud computing technology to improve the current computer training platform，and developed the corresponding computer training teaching management platform. Based on tracking and managing the computer training process，the system had the functions of the courseware management，the sharing of resources，the automatic generation of papers，the on-line assessment and so on. With the test，it is found that the function of the system is stable and can meet the needs of the computer training teaching.

Key words: polyimide（PI）, fluorine-doping, UV absorption, TD-DFT, excited states