The critical function and critical rules based on the spectrum characteristicselection and the process of spatial dimensional reduction were established.
通过光谱特征选择及空间降维处理，建立了判别函数，确定了判别规则。
2
According to the calculation result and features of low percentage interturn fault, the general characteristicselection for percentage differential relay of transformer is suggested.
最后根据轻微故障的特点提出对变压器比率差动继电器通用特性选择的建议，供同仁参考。
3
To compress the dimensions of characteristic vector and make the design of classificatory in the characteristic space with lower dimensions is the purpose of characteristicselection and extraction.