The positive square root of the variance is called the standard deviation. 方差的正的平方根叫做標準差。
And it is unsuitable to use different letters to indicate the Bessel formula and the definition formula of standard error. 用不同的代號表示貝塞爾公式和標準差的定義式不夠妥當。
Combining the concept of the error sensitivity with robotics, a new approach to the analysis on the error prominency factors of robots is proposed. 將誤差理論中誤差靈敏度的概念引入機器人學，提出了一種新的機器人位姿誤差顯著性分析法。
