Xie Wen-Xian, Li Dong-Ping, Xu Peng-Fei, Cai Li, Jin Yan-Fei. Stochastic resonance of a memorial-damped linear system with natural frequency fluctuationJ. Acta Physica Sinica, 2014, 63(10): 100502. DOI: 10.7498/aps.63.100502