4Rafsanjani A, Abbasion S, Farshidianfar A. Nonlinear Dynamic Modeling of Surface Defects in Rolling Ele- ment Bearing Systems [ J ]. Journal of Sound and Vibra- tion,2009,319(3) :1 150-1 174.
5Chen Peng, Masatoshi T, Toshio T. Fault Diagnosis Meth- od for Machinery in Unsteady Operating Condition by In- stantaneous Power Spectrum and Genetic Programming [ J]. Mechanical Systems and Signal Processing, 2005, 19(1) : 175 -194.
6Mevel B, Guyader J L. Experiments on Routes to Chaos in Ball Bearings [ J ]. Journal of Sound and Vibration, 2008,318(3) :549 -564.
