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中文摘要：
简要介绍了随机共振，并以双势阱朗之万方程为例对产生随机共振的三种方法进行了分析及比较．当以输出信噪比为度量方式时，同时调节系统参数和噪声强度耍优于仅调节系统参数或仅调节噪声强度，且其最大值取在噪声下边界上．于是，可以首先将噪声固定在其最小值，然后通过调节系统参数获得最大输出信噪比．
英文摘要：
Firstly,the authors describe the stochastic resonance briefly. Secondly, using double-well Lan- gevin equation as an example,analyse and compare three methods with which the system can turn to sto- chastic resonance. While output signal to noise ratio（SNR） is used as the measurement of stochastic res- onance,tuning system parameter and noise intensity at the same time can get bigger SNR than only tun- ing the system parameter or the noise intensity,and the maximum of SNR is on the lower boundary of noise. Thus,fixing the noise intensity at its lower boundary,and then tuning the system parameter can get the same maximum of SNR.
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