The radon leakage and moisture of the body source models throughout China have been measured and the normalizedvalue of quantity of all body source models has been determined.
Every attribute in the data set should be normalized, whereby each value is divided by the difference between the high value and the low value in the data set for that attribute.
数据集内的每个属性都应该是规格化的，因此，每个值均除以该属性在数据集内的最高值与最低值间的差值。
3
A weight is normalized to a real number in the range 0 through 1, where 0 is the minimum and 1 the maximum value.