| 胎儿瞬时心率信号的非线性分析 |
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| 引用本文： | 王立媛,杨立平,魏凤云.胎儿瞬时心率信号的非线性分析[J].长春光学精密机械学院学报,2011(2):124-127. |
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| 作者姓名： | 王立媛 杨立平 魏凤云 |
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| 作者单位： | [1]哈尔滨工程大学理学院,哈尔滨150001 [2]哈尔滨工程大学能源与动力工程学院,哈尔滨150001 [3]长春师范学院历史学院,长春130032 |
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| 基金项目： | 吉林省教育厅科研计划项目资助（2005163） |
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| 摘 要： | 心率包含自治神经系统协作活动的可靠信息,对FHR信号进行研究有助于对胎儿健康状况的诊断,因此本文利用非线性时间序列的分析方法对健康胎儿心率（FHR）信号的动力学特性展开研究,利用超声多普勒监护仪测取FHR信号,选取85例健康信号进行分析,结果表明：由健康的FHR信号重构的吸引子明显区别于周期吸引子和噪声,最大Lyapunov指数LLE为0.11±0.04,关联维为58±0.34,替代数据测试表明原数据显著区别于替代数据集,因此健康胎儿的FHR信号具有非线性混沌特征,所描述的系统是一个高维混沌系统。
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| 关 键 词： | 胎儿心率 非线性分析 最大Lyapunov指数 关联维 混沌 |
Nonlinear Analysis of Fetal Instantaneous Heart Rate Signal |
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| WANG Liyuan,YANG Liping,WEI Fengyun.Nonlinear Analysis of Fetal Instantaneous Heart Rate Signal[J].Journal of Changchun Institute of Optics and Fine Mechanics,2011(2):124-127. |
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| Authors: | WANG Liyuan YANG Liping WEI Fengyun |
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| Affiliation: | 1.College of science,Harbin Engineering University,Harbin 150001;2.College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001;3.College of history,Changchun Normal University,Changchun 130032) |
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| Abstract: | Heart rate is known to contain reliable indications about the synergic activity of the autonomic nervous system, which regulates the heartbeat dynamics.Many studies on the physiology of the cardiovascular system reported that nonlinear chaotic dynamics may govern the generation of the heart rate signal.Dynamical characteristics of healthy fetal heart rate signal was studied using nonlinear time series analysis methods.By recording fetal heart rate signal via the ultrasound Doppler monitor,we analyzed eighty five healthy signal,results show that Largest Lyapunov Exponent（LLE）is 0.11±0.04,Correlation dimension is 5.8±0.34,surrogate data test indicates that original data is significantly different from the corresponding surrogate set,therefore the FHR of healthy normal fetuses has unique nonlinear chaotic characteristics,described system is a high dimensional chaotic system. |
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| Keywords: | fetal heart rate nonlinear analyses largest Lyapunov exponent correlation dimension chaos |
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