利用心电的李氏数探讨混沌在生物进化中的作用

Applying Lyapunov Exponent of Cardioelectrical Signals to Searching for Effect of Chaos in the Evolution of Species

采集了进化程度不同的物种人和犬的心电信号，计算了心电信号的李氏数（Ｌｙａｐｕｎｏｖ指数），得出了以下结论：心电信号的李氏数反映了心脏的总体动态特征，它可作为一种定量研究心电图的新方法进行心血管疾病的早期诊断；生物进化是自然选择和混沌相结合的产物·

Cardioelectrical signals of different evolution level species human being and canines were sampled, the Lyapunov exponents of the cardioelectrical signals were computed. The computations of the Lyapunov exponents to the cardioelectrical signals reflect the whole dynamic characteristics of hearts, it may become a new method for studying quantitatively electrocardiograms,and be used to diagnose heart disease early. The evolution of species may be the outcome combining natural selection with chaos.