徐州师范大学学报(自然科学版)
徐州師範大學學報(自然科學版)
서주사범대학학보(자연과학판)
JOURNAL OF XUZHOU NORMAL UNIVERSITY(NATURAL SCIENCE EDITION)
2010年
2期
43-47
,共5页
随机共振%热敏神经元%噪声%信噪比
隨機共振%熱敏神經元%譟聲%信譟比
수궤공진%열민신경원%조성%신조비
stochastic resonance%thermally sensitive neuron%noise%signal-to-noise ratio
利用热敏神经元动作电位发放图、ISI分叉图、功率谱密度(PSD)等,系统地研究了单热敏神经元在噪声诱导下的随机共振现象.通过对比分析发现分岔周期数为1或者2的情况下,存在一最优输入信号频率fopt,使得神经元输出信噪比(rSNR)最高.不同噪声强度D下,热敏神经元对输人信号检测能力各异,低噪声强度下检测能力较好.
利用熱敏神經元動作電位髮放圖、ISI分扠圖、功率譜密度(PSD)等,繫統地研究瞭單熱敏神經元在譟聲誘導下的隨機共振現象.通過對比分析髮現分岔週期數為1或者2的情況下,存在一最優輸入信號頻率fopt,使得神經元輸齣信譟比(rSNR)最高.不同譟聲彊度D下,熱敏神經元對輸人信號檢測能力各異,低譟聲彊度下檢測能力較好.
이용열민신경원동작전위발방도、ISI분차도、공솔보밀도(PSD)등,계통지연구료단열민신경원재조성유도하적수궤공진현상.통과대비분석발현분차주기수위1혹자2적정황하,존재일최우수입신호빈솔fopt,사득신경원수출신조비(rSNR)최고.불동조성강도D하,열민신경원대수인신호검측능력각이,저조성강도하검측능력교호.
The phenomenon of noise-induced stochastic resonance(SR)in a single thermally senstive neuron system has been studied with methods of action potential,inter spike interval(ISI)and power spectrum destiny(PSD).After comparing,it is found that there exists such an optimal input frequency fopt that can generate the maximal signal-to-noise ratio(rSNR)while the ISI bifurcation graph is period-1 or period-2.Under different noise intensity D,the thermal neuron takes on varied looks for the detecting ability.