Of some textbooks of organic chemistry, There is a error in equation for preparing amines from alkyl halides and ammonia.
在某些《有机化学》教科书中，卤代烷与氨反应制备胺的反应方程序有误。
The uncertain term derived from rotor resistance, that produces the estimation error, appears in both the stator current equation and rotor flux equation.
造成电流型观测器估计误差的转子电阻不确定项，在定子电流方程中同样存在。
In solving system of linear algebraic equation with iteration method, the error checking is discussed.
讨论使用迭代法解线性代数方程组的误差检验问题。
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