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Spiking sychronization regulated by noise in three types of Hodgkin—Huxley neuronal networks 下载免费PDF全文
In this paper,we study spiking synchronization in three different types of Hodgkin-Huxley neuronal networks,which are the small-world,regular,and random neuronal networks.All the neurons are subjected to subthreshold stimulus and external noise.It is found that in each of all the neuronal networks there is an optimal strength of noise to induce the maximal spiking synchronization.We further demonstrate that in each of the neuronal networks there is a range of synaptic conductance to induce the effect that an optimal strength of noise maximizes the spiking synchronization.Only when the magnitude of the synaptic conductance is moderate,will the effect be considerable.However,if the synaptic conductance is small or large,the effect vanishes.As the connections between neurons increase,the synaptic conductance to maximize the effect decreases.Therefore,we show quantitatively that the noise-induced maximal synchronization in the Hodgkin-Huxley neuronal network is a general effect,regardless of the specific type of neuronal network. 相似文献
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安丰稳 《数学年刊A辑(中文版)》2004,(1)
讨论幺环上的一种群具体作用的G-等变代数K-群(本文只定义前两个群,其它高阶群将见我们的后续文章),这与通常熟知的经典情形(见[1,3])不相同,这里群在环上的作用相对于经典情形来说较“具体” 然后,计算有理数域Q第0阶群具体作用的G-等变代数K-群,这是本文的主要定理。 相似文献
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We investigate the structure and exchange coupling in TbFeCo/FePt bilayer films. It is found that FePt has the L10 structure and the easy axis of the FePt film is perpendicular to the film plane. Results of the vibrating sample magnetometer and the magneto-optical Kerr effect measurements show a strong perpendicular exchange coupling between the ferrimagnetic TbFeCo layer and the hard ferromagnetic FePt layer. The magnetization direction of each layer and the process of magnetization reversal are discussed in detail. The switching field dependence on the exchange coupling has been modelled by micromagnetic simulation and the interlayer coupling constant is about -0.9 erg/cm^2 according to this simulation. 相似文献
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Banach流形上映射度 总被引:1,自引:0,他引:1
本文讨论一种无限维流形上拓扑不变量,即具有可定向Fredholm结构的实Banach流形上 Cr 映射度.它是通常有限维流形上光滑映射度的一种自然推广. 相似文献
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针对轨索移梁新工艺在悬索桥建设中的关键技术问题进行了理论分析和整体模型试验研究。根据柔索结构基本假定,建立了轨索移梁系统负载状态下的整体力学分析模型,并推导了主缆、吊索和轨索等各构件受力状态的计算方程。理论模型中,移梁小车所在轨索节段采用4个直线索单元模拟,其他位置的轨索节段采用1个直线索单元模拟。以矮寨悬索桥为工程背景,设计制作了轨索移梁体系的整体缩尺模型用以模拟移梁过程,测试了第一段梁从入轨到安装多个子工况的体系响应。理论计算结果与模型试验结果吻合良好,表明本文的计算方法正确有效,能解决轨索移梁工艺负载移梁过程中体系整体受力分析和轨索局部变形分析求解问题。该方法可简化计算过程,计算精度和结果能够应用于工程计算分析和求解,是一种适合于轨索移梁工艺负载状态下体系的分析方法。 相似文献
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针对远程证明中存在的效率问题,在现有可信计算模块(TPM)的基础上,提出了批处理方案,将短时间段内到达的请求集中进行处理,并利用Merkle树进一步减少批处理方案中通信量增长的不足.在可信移动代理服务(MAS)中的应用表明,一定时间内到达的请求越多,基于批处理的远程证明的效率提高的程度越好. 相似文献