pen-based interactive system 笔式交互系统
To solve this problem, this paper designs and implements a geometric teaching system based on PUI (Pen User Interface), and applies technique of bidirectional geometrical constraint to this system.
针对这个问题该文基于人机交互中的笔交互技术，设计并实现了一套几何教学系统，并将双向几何约束的相关技术应用于该系统中。
The technique system of intelligent sketching is presented, including the pen based natural gesture interface, free-hand sketching input, sketching recognition and sketch based solid modeling.
构建出智能草图的技术体系，包括基于单笔划的自然手势界面，徒手草图输入，草图识别与基于草图的几何建模。
Based on the "Accounting Law", this article has explained policies must be stuck to in the "one-pen" approving system of financial expenditures.
文章以《会计法》为依据，阐述了制定财务支出一支笔审批制度必须遵守的具体原则。
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