In addition, the theory and methods of informal learning, learning organization and knowledge management can also provide guidance to the Virtual learning Community from different levels.
另外，非正式学习、学习型组织及知识管理的相关理论与方法也从不同层面对虚拟学习社区提供了指导。
A motion guidance method based on semantics recognition and constraint recognition is provided to help the user move or rotate the parts in the virtual environment freely and precisely.
通过语义识别捕捉虚拟装配过程中用户交互意图，进行装配零部件的运动引导与精确定位，使得用户能够在虚拟环境中自如地、准确地进行装配定位。
A research platform of ultrasonic guidance system for the blind based on the virtual instrument technology was built.
本文构造了一种基于虚拟仪器技术的超声波导盲系统研究平台。
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