例句與造句

1. Observe that the characteristic function is not differentiable at the origin : this corresponds to the fact that the Cauchy distribution does not have well-defined moments higher than the zeroth moment.
2. If the points represent mass, then the zeroth moment is the total mass, the first moment divided by the total mass is the center of mass, and the second moment is the rotational inertia.
3. If the points represent probability density, then the zeroth moment is the total probability ( i . e . one ), the first moment is the mean, the second central moment is the variance, the third central moment is the skewness, and the fourth central moment ( with normalization and shift ) is the kurtosis.
4. It's difficult to find zeroth moment in a sentence. 用zeroth moment造句挺難的