The project supported by National Natural Science Foundation of China under Grant Nos. 10435080 and 10575123 and the Chinese Academy of Sciences Knowledge Innovation Project under Grant Nos. KJCX2-SW-
<正> Black-Scholes equation is used to model stock option pricing.In this paper,optimal systems with one to fourparameters of Lie point symmetries for Black-Sch
<正> In this paper,we consider the phenomenon of stochastic resonance(SR)in a quartic bistable system underthe simultaneous action of a multiplicative non-Gauss