ASIA unversity:Item 310904400/2735
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 90453/105672 (86%)
造访人次 : 12072962      在线人数 : 352
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    题名: Pulse Transit Time and Hilbert-Huang Transform Based Biosignal Analysis and Application on Leg-Crossing
    作者: Keng-Ming Chang
    贡献者: Department of Photonics and Communication Engineering
    关键词: Electrocardiogram(ECG);Hilbert-Huang transform(HHT);Empirical mode decomposition(EMD);Ensemble empirical mode decomposition(EEMD);pulse transit time(PTT);HRV;Leg-Crossing
    日期: 2009
    上传时间: 2009-11-16 16:04:23 (UTC+8)
    出版者: Asia University
    摘要: Electrocardiogram in survey process frequently easily by many noise disturbances, and these noise will often affect the electrocardiogram the diagnosis or let the feature extract have a difficulty. Therefore we using the first part of Hilbert - Huang transform (HHT), the empirical mode decomposition (EMD) to filter the noise. In the process, we discovered that the filter of EMD method will sacrifice a part of the low frequency ingredient. So, we try to use the ensemble empirical mode decomposition (EEMD) to as the filter. And makes the error by Signal-to-Error Ratio (SER) to estimate, finally the effect of EEMD method indeed surpasses the EMD method and also better than traditional Butterworth filter. After completing the electrocardiogram filter processing we calculate pulse transit time (PTT). We try to develop some new PTT derivation parameter from PTT, applying the parameter in the experiment of Leg-Crossing. Compared with the HRV parameter and the PTT derivation parameter, discovered that the PTT derivation parameter to have more differences than the HRV parameter in posture change. When posture change, the HRV parameter only the RRI has difference (P<0.05), But in PTT derivation parameter PTT, PTT_SDNN, PTT_SD2, PTT_HF all have the obvious difference (P<0.05). This result showed that PTT more suitable to HRV in the posture change research. In future may apply the PTT derivation parameter to the broader range of study, we believed that can obtain more interesting discoveries surely.
    显示于类别:[光電與通訊學系] 博碩士論文


    档案 大小格式浏览次数


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈