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基于相空间重构和FastICA算法胃消化间期压力活动的分析.pdf11页
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Study on Gastric Interdigestive Pressure Activity Based on
Phase Space Reconstruction and FastICA Algorithm
Huang Biao ，Yan Guozheng ，Zan Peng ，Li Qianru
No.820 Lab., Department of Instrument, Shanghai Jiaotong University, Shanghai
E-mail ：huangb@
wireless radiotelemetry capsule. But the capsule only records single-dimensional pressure time series
interdependent
components
simultaneously.
reconstruction
reconstruct
multi-dimensional
dominant and separated component of the gastric contractions is identified using FastICA algorithm.
Finally the use of Hilbert Huang transform method for analyzing the characters of gastric motility is
investigated. The results show that the proposed method is an effective approach for the analysis of the
gastric pressure series.
Keywords: radiotelemetry capsule, gastric motility, phase space reconstruction, FastICA algorithm
1. Introduction
The stomach is an organ in the alimentary canal used to store and digest food. After feeding,
the contractile activity of the stomach helps to mix, grind and eventually evacuate small portions
of chyme into the small bowel, while the rest of the chyme is mixed and ground [1]. This intrinsic
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