脉搏信号的特征点提取方法研究

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1、word格式文档脉搏信号的特征点提取方法研究摘要脉搏为体表可触摸到的动脉搏动，它的信号特征对研究心血管系统疾病有着极重要的意义。临床上，我们经常通过分析其波形形态的变化，对病患的心血管系统疾病进行初步诊断。这也足以说明脉搏信号在心血管生理病理研究方面占据着重要的地位。而用MATLAB软件工具实现的阈值法，是现在微弱信号特征提取一种比较常见、代码相对简易的算法，但此原始的方法存在着缺陷，分析结果也容易出现较大的偏差。因此本文对传统的阈值算法进行了改进，采用了差分的阈值方法，可以进一步完善脉搏信号特征点的提取。关键词：脉搏信号；特征提取；差分阈值法；MATLAB软件AB

2、STRACTPulseisthearterialpulsetouchedonsurface,ithasindispensablemeaningtoreaserchcardiovasculardisease.Clinicallyweoftenhaveapreliminary diagnosisof patientswith cardiovasculardiseaseaccordingtoanalysingthechangeof waveformmorphology.Thisisenoughtoprovethatpulsesignal playsanimportantr

3、oleinthe researchof cardiovascularphysiologyandpathology.Andthresholdmethod basedonMATLABisanusualkindofalgorithmthathastherelatively simplecodeinfieldofweaksignal feature extractionrecently,butthereareseveralbugsinthismethod,whileitsresultalsoappears bigdeviation.Sointhispaperweimprov

4、edthetraditionalthresholdmethod basedonMATLABwithdifferentialthresholdalgorithm.Thismethodcanfurtherimprovethepulsesignal feature extraction.KeyWords：Pulsesignal;featureextraction;Differencethresholdalgorithm;MATLAB;目录专业整理word格式文档一、绪论····················································

5、·11.1研究背景·························································11.2脉搏信号基础·····················································2二、提取脉搏信号的原因及方法······································42.1提取脉搏信号的原因··············································42.2脉搏信号提取的方法································

6、···············4三、脉搏信号的特征值········································63.1脉搏信号的特征点·················································63.2K值·····························································7四、脉搏信号特征值提取算法········································9专业整理word格式文档4.1数据来源··················

7、·······································94.2阈值法提取特征值94.2.1脉搏波的绘制94.2.2动态阈值设定104.2.3特征值的提取10五、总结与展望135.1总结135.2展望13参考文献14致谢16附录17专业整理word格式文档一、绪论1.1研究背景及意义随着各国学者们对亚健康状态的问题展开更加广泛而深入的研究，现在一致的观点认为，亚健康状态是指机体虽无明确疾病，却呈现活力下降、适应能力减退的一种“生理状态”现象，是介于健康和疾病之间的一种中间状态，也称为第三状态、临界状态、灰色状态、或病前状态。中医在中国有着悠