...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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修正即便仅仅是一个计算误差或者是一个另外的观点事例能够简简单单地增加一点点分数。
Correcting even one calculation error or adding one other point or example can easily add a few points to your grade.
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.
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