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The output power and the signal-to-noise ratio of an overdamped harmonic oscillator are calculated in the case of square wave signal input. The corresponding stochastic resonance phenomenon and the comparison with the case of cosine signal input are discussed. Results reveal that there appear the stochastic resonances in these two cases, and the phenomenon in which the resonance and suppression are coexistent, but the coexistence phenomenon appears in the different stochastic resonance curves for these two models.
[1] Chandrasekhar 1943 Rev. Mod. Phys. 15 1
[2] Liu L, Zhang L Y, Cao L 2009 Chin Phys. B 18 4182
[3] Chen D Y, Wang Z L 2010 Acta Phys. Sin. 59 111 (in Chinese) [陈德彝、王忠龙 2010 物理学报 59 111]
[4] Liu L, Wu D J 2009 College Physics 16 28 (in Chinese) [刘 立、吴大进 2009 大学物理 16 28]
[5] Gitterman M 2003 Phys. Rev. E 67 057103
[6] Gitterman M 2004 Phys. Rev. E 69 041101
[7] Zhang L, Liu L, Cao L 2010 Acta Phys. Sin. 59 1494 (in Chinese) [张 莉、刘 立、曹 力 2010 物理学报 59 1494]
[8] Jin Y F, Hu H Y 2009 Acta Phys. Sin. 58 2895 (in Chinese) [靳艳飞、胡海岩 2009 物理学报 58 2895]
[9] Zhang L, Cao L 2010 Chin. Phys. Lett. 27 060504
[10] Cao L, Wu D J 2007 Int. J. Mod. Phys. B 21 1721
[11] Arnold L 1974 Stochastic Defferential Equations: Theory and Applications(New York: Willy-Interscience Publication)
[12] Cao L, Wu D J 2007 Physica A 376 191
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[1] Chandrasekhar 1943 Rev. Mod. Phys. 15 1
[2] Liu L, Zhang L Y, Cao L 2009 Chin Phys. B 18 4182
[3] Chen D Y, Wang Z L 2010 Acta Phys. Sin. 59 111 (in Chinese) [陈德彝、王忠龙 2010 物理学报 59 111]
[4] Liu L, Wu D J 2009 College Physics 16 28 (in Chinese) [刘 立、吴大进 2009 大学物理 16 28]
[5] Gitterman M 2003 Phys. Rev. E 67 057103
[6] Gitterman M 2004 Phys. Rev. E 69 041101
[7] Zhang L, Liu L, Cao L 2010 Acta Phys. Sin. 59 1494 (in Chinese) [张 莉、刘 立、曹 力 2010 物理学报 59 1494]
[8] Jin Y F, Hu H Y 2009 Acta Phys. Sin. 58 2895 (in Chinese) [靳艳飞、胡海岩 2009 物理学报 58 2895]
[9] Zhang L, Cao L 2010 Chin. Phys. Lett. 27 060504
[10] Cao L, Wu D J 2007 Int. J. Mod. Phys. B 21 1721
[11] Arnold L 1974 Stochastic Defferential Equations: Theory and Applications(New York: Willy-Interscience Publication)
[12] Cao L, Wu D J 2007 Physica A 376 191
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