基于行为感知的用户画像技术

尤明辉,殷亚凤,谢磊,陆桑璐

User profiling based on activity sensing

Ming-hui YOU,Ya-feng YIN,Lei XIE,Sang-lu LU

表 2 所选择的频域特征

Tab.2 Frequency domain features used in training

频域特征 计算公式 均值 ${\mu }_{{\rm{amp}}}=\dfrac{1}{N}{\displaystyle\sum }_{i=1}^{{N} }{G}_{i}$ 标准差 ${\sigma }_{{\rm{amp}}}=\sqrt{\dfrac{1}{N}{\displaystyle\sum }_{i=1}^{N}{\left({G}_{i}-{\mu }_{{\rm{amp}}}\right)}^{2} }$ 峰度 ${\gamma }_{{\rm{amp}}}=\dfrac{1}{N}{\displaystyle\sum }_{i=1}^{N}{\left[\dfrac{ {G}_{i}-{\mu }_{{\rm{amp}}} }{ {\sigma }_{{\rm{amp}}} }\right]}^{4}- 3$