摘要
我们用非线性动力学的方法分析了两例健康人的胃电图（Ｅｌｅｃｔｒｏｇａｓｔｒｏｇｒａｍ，简称ＥＧＧ），得出它的功率谱、计算了它的关联维数和最大Ｌｙａｐｕｎｏｖ指数。结果显示：它的功率谱为一有尖峰的连续谱；其关联维数介于６和７之间；它的最大Ｌｖａａｕｎｏｖ指数大于０。由此，我们可以初步推知ＥＧＧ不是随机噪声，它服从确定性的动力学规律。
We analyze the time series of electrogastrogram(EGG) signals with power spectrum method and nonlinear dynamical method. We calculate the correlation dimension and the largest Lyapunov exponent to characterize it.The power spectrum of EGG is continuous with a peak, the correlation dimension is between 6 and 7, and the largest Lyapunov exponent is a positive number. So we conclude that EGG signals are not stochastic noise, but obey certain deterministic law.
出处
《生物物理学报》
CAS
CSCD
北大核心
1996年第4期675-680,共6页
Acta Biophysica Sinica
关键词
胃电图
关联维数
非线性性动力学
EGG Time delay Correlation dimension The largest Lyapunov exponent
