| 利用多导脑电序列的非线性分析测评精神负荷 |
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| 引用本文： | 刘大路,江朝晖,冯焕清,王国燕.利用多导脑电序列的非线性分析测评精神负荷[J].生物医学工程学杂志,2006,23(5):960-963. |
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| 作者姓名： | 刘大路 江朝晖 冯焕清 王国燕 |
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| 作者单位： | 1. 中国科学技术大学,电子科学与技术系,合肥,230026
2. 中国科学技术大学,科技传播与科技政策系,合肥,230026 |
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| 摘 要： | 精神负荷的研究对于改善工作环境和提高工作效率有着重要的意义，脑电、心电、呼吸等生理参数分析可以作为测评精神负荷的重要手段。本研究针对多导脑电提出了一种基于时间延迟和序列相关性的多导信号相空间重构的非线性动力学分析方法。对仿真数据的研究表明这种重构方法在信号的确定性和相关维数计算中具有良好的性能。试验脑电数据的关联维数计算和精神负荷水平的变化具有很强的一致性。结果表明该方法适用于多导脑电序列的非线性分析并可作为测评精神负荷的重要依据。
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| 关 键 词： | 精神负荷 多导相空间重构 确定性 相关维数 |
| 收稿时间： | 2004-04-13 |
| 修稿时间： | 2004-04-132004-10-19 |
Nonlinear Analysis of Multi-channel EEG and Its Application to Mental Workload Detectection |
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| Liu Dalu,Jiang Zhaohui,Feng Huanqing,Wang guoyan.Nonlinear Analysis of Multi-channel EEG and Its Application to Mental Workload Detectection[J].Journal of Biomedical Engineering,2006,23(5):960-963. |
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| Authors: | Liu Dalu Jiang Zhaohui Feng Huanqing Wang guoyan |
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| Institution: | Dept. Electronic Sci. & tech., University of Sci. & Tech. of China, Hefei 230026, China. |
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| Abstract: | Mental workload research is important to people's health and work efficiency,Psychophysiological measures such as electroencephalography(EEG),ECG and respiration measures can be used to predict mental workload level.A Multi-channel phase-space reconstruction method is proposed in this paper which rearranges signal serials by the correlation coefficients and select time delay by signal determinism.The study of determinism and correlation dimension on simulative data exhibits a good performance.The result of EEG series shows a clearly consistency to workload level variety.The method is useful for multi-channel signals nonlinear analysis and mental workload detection. |
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| Keywords: | Mental workload Multi-channel phase-space reconstruction Determinism Correlation dimension |
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