文章提出了一种基于识别结果反馈信息的闭环联机字符识别系统。
In this paper, a closed loop on-line character recognition system based on feedback information of recognition results is proposed.
而并联机器人是一种闭环机构，导致了其运动学和工作空间分析较为困难。
However, it is rather difficult to analyze the kinematics and workspace of parallel manipulators due to its specific closed-loop.
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