基于一级倒立摆系统线性模型的不确定性，建立了灰色预测模型。
Based on the uncertainty of linear model for single - inversed pendulum, a gray prediction model is built up.
模型的不确定性(模型误差)是通过建立的虚拟观测方程来考虑的。
The model uncertainties or model errors also can be considered through some fictitious observation equations.
自适应教育超媒体系统中，学生模型的不确定性因素的处理是非常重要的问题。
In Hypermedia Educational System, it is one of critical issues to process uncertainty of student mode.
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