组间波形相似度及在中医推拿法垂直作用力信号分析中的应用  

Waveform similarity and its application to the vertical force signals analysis on rolling manipulation

作　　者：章丹颂[1] 吕杰[1] 方磊[2] 许世雄[1] 房敏[2] 

机构地区：[1]复旦大学力学与工程科学系,上海200433 [2]上海中医药大学附属岳阳中西医结合医院,上海200437

出　　处：《医用生物力学》2011年第2期133-136,149,共5页Journal of Medical Biomechanics

基　　金：国家重点基础研究发展计划(973计划)项目(2007CB512700);上海市重点学科建设项目(B112)

摘　　要：目的研究表征同类信号不同组间波形相似程度的定量指标,并应用于中医推拿法垂直作用力信号分析。方法对两列同类周期信号序列归一化和波形误差分析后,定义表征同类信号不同组间波形相似程度的组间波形相似度。实测著名推拿医师、已学习中医法一段时间的研究生和法初学者3组操作者的法垂直作用力信号,计算3组信号的组间波形相似度,分析他们的相似程度。结果数位推拿医师之间的法垂直作用力信号组间波形相似度较高,可作为其他法垂直作用力信号与之比较的模板,研究生和医师之间的相似度次之,初学者与医师之间的相似度最低,三者有显著性差异。结论本文提出的组间波形相似度可以作为评判中医推拿法垂直作用力信号不同组间波形相似程度的定量指标,也可应用于其他近周期信号组间波形的相似程度评判。Objective To raise a quantitative indicator for the waveform similarity between different signals of the same kind and apply it to the analysis on the vertical force signals from the rolling manipulation.Method After two signals of the same kind were normalized and their waveform errors were analyzed,the waveform similarity,which was to be utilized to describe the extent to which two signals were similar to each other,was defined.Then,the vertical force signals of the rolling manipulation operated by several experts,graduates who have learned the manipulation for some time and beginners were measured,respectively.Subsequently,the values of the waveform similarity between the three different groups of signals were calculated.Results The similarity between the experts’signals was relatively high,so it was reasonable to be used as a template for other operators’ signals to be compared with.Further calculation revealed that the waveform similarity between the experts’signals and the graduates’was generally lower than that between the experts’,and the similarity between the experts’and the beginners’was the lowest.There was significant difference between the three groups.Conclusions The waveform similarity raised in this paper could serve as a quantitative indicator for the similarity between different vertical force signals from the rolling manipulation,and this method was also applicable to the similarity evaluation between other approximate periodic signals.

关 键 词：波形相似度 法 垂直作用力 信号分析 力学 

分 类 号：R318.01[医药卫生—生物医学工程]