The issue involves two aspects: the extraction of characteristics, and the measurement of the distance between two characteristics vectors, i. e. the problem of characteristic match.
这就涉及两个方面问题，一、如何提取特征，二、特征向量间距离如何测量，也就是特征如何匹配的问题。
2
Analyses show that the characteristic factor for oxide integrity E , i. e. the number of elements per defect, can be calculated from oxide capacitor leak current yield curves.
The dynamic characteristic of interbedded soil is similar to that of soft soil; and this property is caused by its special conformation, i. e. the feeble horizontal joint planes are overgrown.