摘要 : New experimental aspects of Multiplicative noise effects on the onset of ac-driven electroconvection in nematic liquid crystals are presented. In the superposition of a stochastic field with a deterministic one, the variation in t... 展开 New experimental aspects of Multiplicative noise effects on the onset of ac-driven electroconvection in nematic liquid crystals are presented. In the superposition of a stochastic field with a deterministic one, the variation in the threshold voltage 11, (of the deterministic one) was investigated as a function of the intensity (V-N). cutoff frequency (f(c)), and correlation time (tau(N)) of the stochastic noise. In particular, it is observed that the noise effects vanish for certain stochastic and deterministic conditions. 收起