结肠压力活动的长程相关分析

Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi(2007)

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Abstract
应用消除趋势波动分析(Detrended fluctuation analysis,DFA)和功率谱分析(Power spectral analysis,PSA),分别从周期描述(Period representation)和频率描述(Frequency representation)两个不同角度分析了结肠压力活动及其替代数据的长程相关特性。两种分析方法一致性地显示:正常健康人的结肠压力活动存在较强的长程相关性,即未来的变化对过去有"记忆"能力;而压力活动的替代数据因排列次序被随机打乱,原有的长程相关性也被破坏,未来的变化对过去丧失"记忆"能力。结果一定程度上意味着,结肠动力正常时,结肠腔内压力活动有"记忆"能力,而一旦结肠动力异常,这种"记忆"就可能减弱,甚至丧失。
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Key words
colonic pressure activity detrended fluctuation analysis(dfa) power spectral analysis(psa) long-range correlations
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