When the input noise is the single - peak gaussian noise , the noise can improve the signal correlation only for the sub - threshold signal , i . e . subthreshold stochastic resonance ( sr ) exists 当输入噪声为单峰高斯噪声时,输入信号在阈下时噪声才能改善信号的相关性,即随机谐振现象存在。
It has been shown from numerical results that as increasing the discharge pressure , bimodal - peaks distributions for the ion energy become gradually single - peak distributions and low - energy ions increase 数值结果表明:随着放电气压增加,离子在基板上的能量分布逐渐地由双峰分布变成单峰分布,而且低能离子的数目也逐渐地增加。
3 . the numerical result indicated that particle distribution alone surface of inhibitor was enslaved to particle diameter . particle concentration changed from single - peak distribution to multi - peak distribution according to particle size increase ( 3 )数值计算表明两相流中粒径对绝热层表面粒子浓度分布有很大的影响,且随着粒径的增大粒子浓度由单峰分布变为多峰分布。
In the actual fingerprint storehouse , statistics show that ideal bimodal threshold value cannot be found , and the characteristic of single - peak histograms can be generally found in digital fingerprints , the change of threshold value will influence the keeping degree of the quantity of fingerprint characteristic directly 摘要在实际指纹库中,通过统计表明无法得到理想的双峰阈值,指纹的直方图普遍具有单峰的特点,并且阈值的变化会直接影响到指纹特征数量的保持度。
In this work , incident super - gaussian pulse propagation in conventional single - mode fibers has been investigated in detail after taking into account the fiber chromatic dispersion . the results show that for an incident super - gaussian pulse with steep leading and trailing edges , its shape undergoes a variation from near - rectangular , two - peak , and finally to single - peak . in the meantime , its peak intensity increases at first , after passing a maximum , and finally decreases monotonously 数值模拟的结果表明:超高斯入射光脉冲在光纤中传输时脉冲波形、瞬时惆啾、以及峰值强度的演变规律与高斯入射脉冲不同,脉冲波形不再总保持单峰结构,通常将经历一个从近平顶、多峰、最后到单峰的演变过程;从脉冲的前沿到后沿,瞬时明啾也不再为线性,而是具有多个极值;峰值强度随传输距离的变化趋势也不再为一单调递减,而是先增加后减小。