计算力学学报2005，Vol.22Issue(4)：470-476,7.
PHCA实验中犬心脏的非线性动力学研究
Nonlinear dynamics research on the canine hearts in PHCA process
摘要
Abstract
According to the nonlinear theory, the author has designed and conducted the PHCA (profound hypothermia and circulatory arrest) experiments, which are used to research for the nonlineardynamics of the heart. Through the analysis of the power spectra, the computation of the correlation dimension and the Lyapunov exponent to a large number of ECG (electrocardiogram) signals which are sampled on the several temperature platforms of the PHCA experiments, the following conclusions are shown: (1) The power spectra, the correlation dimension and the Lyapunov exponent to ECG signals reflect the whole dynamic characteristics of the hearts, which may be used to estimate healthy condition of the heart. (2) Under normal physiological conditions the cardiac activities are chaotic, while under pathologic conditions the cardiac activities approach regularity.关键词
PHCA实验/心电信号/混沌/有序Key words
chaos/ECG signals/power spectra/correlation dimension/Lyapunov exponent分类
信息技术与安全科学引用本文复制引用
王兴元..PHCA实验中犬心脏的非线性动力学研究[J].计算力学学报,2005,22(4):470-476,7.基金项目
国家自然科学基金(69974008) （69974008）
辽宁省教育厅高等学校科学技术研究项目(20040081) （20040081）
辽宁省自然科学基金(972194)资助项目.Project supported by the Chinese National Natural Science Fund (69974008), the technology research item of colleges of the education office of Liaoning province(972194). （972194）
