...结果(即我们观察到的分数)既包含了能够反映他真实水平的分数即真分数(true score)，又包含了种种原因造成的误差分数(error score)，如被试的情绪状态和身体状况、测试环境或其他条件都可能影响其正常发挥水平。
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通过分析某精密转轴轴心径向回转误差运动轨迹的方差变化规律，证明该轴的回转运动具备了分数布朗运动的基本特征。
According to variance changing laws of a precise rotor radial rotating error motion, it can be proved that the rotor's motion track is characterized by fractional Brownian motion.
提出了一种只需要存储部分历史数据的分数积分的数值计算方法，并给出了误差估计。
A new numerical method for the fractional integral that only stores part history data is presented, and its discretization error is estimated.
我们提出一种计算有效的分数阶预估-校正方法，导出了其误差估计。
A computationally effective fractional Predictor-Corrector method is proposed, and a detailed error analysis is derived.
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