物理学报2012，Vol.61Issue(12)：124-130,7.
非均匀可激发介质中的稀密螺旋波
Sparse and dense spiral waves in heterogeneous excitable media
摘要
Abstract
Dynamic behaviors of sparse and dense spirals are investigated numerically based on a Barkley model in heterogeneous excitable media. It is found that the rotating frequency of sparse spiral wave decreases rapidly with b increasing and then tends to saturation, which is different from that of dense spiral wave. The period and wavelength of dense spiral wave increase with the increase of parameter e or the size/~ of localized inhomogeneity, which depends more sensitively on the size R than those of sparse sprial wave. The change of the speed of dense spiral wave tip with R is opposite to that of the sparse spiral wave tip. In addition, inhomogeneous effect gives rise to a defect point in arm of each of the two spiral waves when e or b increases above a critical value.关键词
螺旋波/非均匀区域/可激发介质/动力学行为Key words
spiral waves/localized inhomogeneity/excitable media/dynamics behaviors分类
信息技术与安全科学引用本文复制引用
董丽劳,白占国,贺亚峰..非均匀可激发介质中的稀密螺旋波[J].物理学报,2012,61(12):124-130,7.基金项目
国家自然科学基金（批准号：10975043）,河北省自然科学基金（批准号：2010000185）和河北省教育厅重点项目（批准号：ZD2010140）资助的课题. （）
