Dissertation > Excellent graduate degree dissertation topics show

Nonlinear Analysis on Human Pulse and Research on Effects of Different Emotions and Environmental Conditions

Author: HanQingPeng
Tutor: WangPing
School: Zhejiang University
Course: Biomedical Engineering
Keywords: pulse wave nonlinear dynamics wavelet transformation pulse wave character parameter surrogate data method emotion car vibration and noise
CLC: R318.04
Type: PhD thesis
Year: 2007
Downloads: 580
Quote: 7
Read: Download Dissertation


Pulse waves play really important role in the research field of cardiovascular system,which directly reflect the fluctuation of heart and artery cardiovascular system. In this paper, thegenerating physiological mechanisms of pulse waves are firstly particularly described according tothe view of physiological anatomy and nervous system.An efficient de-noising algorithm for removing baseline drift, disturbances of workingfrequency and electromyography in human pulse signals is proposed based on wavelet transformtheory. Then the de-noised pulse signals are decomposed using wavelet decomposition and certaindetail components are reconstructed. The peaks of main pulse wave, i. e. P-waves, are extractedbased on the above reconstructed detailed signals and threshold approach firstly. And then, fivefeature points of the pulse signal are identified. The extraction of T-wave peaks, D-wave peaks,V-wave troughs and starting points are achieved depending on the position relations between thesepoints and P-wave peaks.The continuous pulse waves exhibit obvious periodically and with discrete frequency spectra.The amplitude frequency spectra are calculated for different physiological states here. Pulse wavesignals also show complicate multi-frequency band characteristics. The time-frequency changingrules of pulse waves in different physiological states are analyzed with a given wavelet packagebased energy ratio method.The time series of the pulse main peaks (i. e. PP wave intervals) are similar with HRVs.Nonlinear characteristics of PP intervals are mainly analyzed for different physiological states. Withsurrogate data method, which is applied to identifying the existing chaos of PP intervals of pulse, itis proved that the series of PP intervals of pulse are chaotic. After introducing details of the surrogatedata method, some characteristic parameters in the method are used to compare differentphysiological and pathological states.Some nonlinear parameters of PP wave intervals are calculated here, including correlationdimensions, maximum Lyapunov exponents, approximate entropy and complexity. All these valuesare used to distinguish quantitatively for the differences among physiological and pathologicalstates. Then a digital signal measuring and recording device for pulse waves is developed whichincludes local flash memory and multi-communication channels, in which suitable amplifier, filterand advanced embedded system techniques are adopted carefully. The really weak pulse waves atfinger can be detected easily, conveniently and accurately with it.At last, the changes of pulse waves are studies for different emotion stress states by usingnonlinear analysis methods. Furthermore, some research on the changes of pulse waves undersituation of vibration and noise environment in a car are also studied.In summary, nonlinear characteristics of pulse waves are analyzed based on measured data.With nonlinear dynamics, chaos identification theory nonlinear estimation together with wavelettransform technology, pulse wave signals are treated for de-noising and extracting of characteristicpoints. Nonlinear description and identification are finished for different pulse waves in differentphysiological status, such as healthy, sexual, age, sleeping states etc. Furthermore, these also areapplied on the research under different emotions and the special situation of car vibration and noiseenvironment.Certainly, there are much more things to do to explain the principles of pulse waves in differentphysiological statuses, and the algorithms and some conclusions also need much more clinicalexperiment to be testified.

Related Dissertations

  1. The Research of Women’s Underwear Design Based on Customer’s Emotional Needs,TS941.713.3
  2. The Relationships between Social Skill and Emotion Regulation in Undergradurate of Internet Game Addiction,B842.6
  3. The Empirical Research on Service Encounter Affecting Customer Loyalty of Female Underwear Brand,F274
  4. A Rhetorical Analysis of the Controversy over the Textbooks of Elementary Chinese,G623.2
  5. Speech Emotion Recognition Based on Multifractal,TN912.34
  6. Research on Feature Selection and Construction in Emotion Speech Recognition,TP18
  7. The Effect of Emotion on the Invulnerability of Representations in Visual Working Memory,B842.3
  8. The Impact of Betrayal on Risky Decision Making,B84
  9. A Philosophical Study of Cognitive Emotional Design,B842
  10. Effect of Different Emotion Regulation Modes on Activities of Autonomic Nervous System of Essential Hypertensive Patients with Type A Personality under Emotion Stimulis,R544.1
  11. The Stuy on Physics Learning Emotion of Arts Girls in Senior High School,G633.7
  12. Emotional Expression of Action Design in Animation,J954
  13. EEG -based emotion recognition,TP391.4
  14. EEG -based image retrieval of emotional,TP391.41
  15. Three parameters of human stress detection system,R318.0
  16. Research on the Cognitive Behavior Modeling of Emotional Agent,TP391.9
  17. Pulse wave - based development and clinical validation of blood pressure measuring instrument,R544.1
  18. Comparative Research of Carotid Artery Elasticity between Hypertention and Prehypertention Groups in County Community of Shandong Province,R544.1
  19. Nonlinear Dynamic Response and Stability Analysis of Rotor-bearing Systems with Samcef/Rotor,TH113
  20. Effects of Electric Acupuncture Combined with rTMS on Emotions and ERPs in Rat Model of Anxiety,R749.72
  21. The Value of Ankle-brachial Index, Brachial-ankle Pulse Wave Velocity of A Joint C-reactive Proteinin the Early Diagnosis of Coronary Heart Disease,R541.4

CLC: > Medicine, health > Basic Medical > Medical science in general > Biomedical Engineering > General issues > Biological information, biological control
© 2012 www.DissertationTopic.Net  Mobile