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THE EFFECTS OF BLOOD VISCOELASTICITY ON THE pulse wave IN ARTERIES

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Applied Mathematics and Mechanics(English Edition) 2000年第9期21卷 1058-1065页

作者：姚大康严育兵柳兆荣 Biomechanics Laboratory Fudan University Shanghai P R China

Based on Womersley' s theory, the frequency equation satisfied by a complex wave velocity of a pulse wave in arteries war generalized to viscoelastic blood, a general formula of the complex wave velocity with regard to both linearly viscoelastic arteries and linearly viscolelastic blood was obtained, and the effects of the viscoelastic property of blood on the phase velocity and the wave attenuation of the pulse wave using the formula systematically was discussed. It is concluded that the influence of the blood elasticity on the wave propagation of a pulse wave in arteries is weaker than that of the arterial viscosity and may be neglected in larger arteries.

关键词： artery pulse wave bleed viscoelasticity

THE INFLUENCE OF CARDIOVASCULAR DYNAMICCOUPLING ON THE BLOOD pulse wave PROPAGATION IN HUMAN BODY

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Applied Mathematics and Mechanics(English Edition) 1998年第7期19卷 601-614页

作者：王英晓吴望一温功碧 Department of Mechanics and Engineering Science Peking University Beijing P. R. China

For the first lime, the pressure and flow pulse wave propagation phenomenon is studied in this paper on the basis of he cardiovascular dynamic coupling. E(t)-R model is adopted for left ventricle and T-Y tube model for systemic arteries. Furthermore, impulse response method and Fourier analysis method are employed After reasonable cardiovascular parameters and their value have been selected, the pressure and flow waveforms ape obtained at any poing along the systemic arteries. The results fit measured data well. In addition, the influences of cardiovascular parameters on pulse wave propagation are studied. The work is useful in practice.

关键词： cardiovascular coupling spread line theory Fourier transfer pulse wave

EMD-based Adaptive wavelet Threshold for pulse wave Denoising

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Chinese Journal of Biomedical Engineering(English Edition) 2015年第1期24卷 1-8页

作者： XU Li-shengl SHEN Yan-hua ZHONG Yue KANG Yan Max Q.-H.Meng Sino -Dutch Biomedical and Information Engineering School Northeastern University Key Laboratory of Medical Image Computing (Northeastern University) Ministry of Education Department of Electronic Engineering The Chinese University of Hong Kong

It is inevitable that noises will be introduced during the acquisition of pulse wave signal, which can result in morphology changes of the original pulse wave,and affect the hemodynamic analysis and diagnosis based on pulse wave signals. In order to remove these noises, an adaptive de-noising method based on empirical mode decomposition(EMD) and wavelet threshold is proposed in this paper. Compared with the wavelet threshold method for denoising pulse wave, the proposed approach is more effective, especially at low signal-to-noise ratio.

关键词： pulse wave de-noising EMD adaptive filter wavelet threshold

A More Effective Method of Extracting the Characteristic Value of pulse wave Signal Based on wavelet Transform

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Journal of Biomedical Science and Engineering 2016年第10期9卷 9-19页

作者： Xuanwei Zhang Yazhou Shang Daoxin Guo Tianxia Zhao Qiuping Li Xin’an Wang The Key Laboratory of Integrated Microsystems Peking University Shenzhen Graduate School Shenzhen China

pulse wave contains human physiological and pathological information. Different people will exhibit different characteristics, and hence determining the characteristic points of the pulse wave of human physiological health makes sense. It is common that we extract the characteristic value of pulse wave signal with the method based on wavelet transform on a small scale, and then determine the locations of the characteristic points by modulus maxima and modulus minima. Before determining characteristic value by detecting modulus maxima and modulus minima, we need to determine every period of the pulse wave. This paper presents a new kind of adaptive threshold determination method which is more effective. It can accurately determine every period of the pulse wave, and then extract characteristic values by modulus maxima and modulus minima in every period of the pulse wave. The method presented in this paper promotes the research utilizing pulse wave on health life.

关键词： pulse wave wavelet Transform Adaptive Threshold Characteristic Values

The Design of A Noninvasive Cardiovascular Function Automatic Detecting Instrument Base on pulse wave

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The Design of A Noninvasive Cardiovascular Function Automati...

AN ANALYSIS MODEL OF PULSATILE BLOOD FLOW IN ARTERIES

2009 9th International Conference on Electronic Measurement & Instruments（ICEMI’2009）

作者： Weijun Song Song Zhang Yimin Yang College of Life Science and Bioengineering Beijing University of Technology

The pulse wave contains many of hemodynamic information,so obtain cardiovascular blood flow parameters by detecting the pulse wave is an important role in examination,treatment and guardianship process of the cardiovascular ***,most of the pulse wave acquisition and analysis require human *** operators decide when to stop the acquisition by observing and determining the validity of the ***,it needs higher professional knowledge to the operator,and the human factors are relatively *** this paper,we designed the system to achieve pulse wave automatic collection,automatic sampling,automatic analyze,reduce the human impact,improve the detection speed and reduce the complexity of the operation,fleetly,conveniently and accurately detect the cardiovascular blood flow parameters.

关键词： noninvasive cardiovascular pulse wave automatic

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Applied Mathematics and Mechanics(English Edition) 2003年第2期24卷 230-240页

作者：柳兆荣徐刚陈泳滕忠照覃开蓉 BiomechanicsLaboratory

Blood flow in artery was treated as the flow under equilibrium state (the steady flow under mean pressure)combined with the periodically small pulsatile *** vascular strain energy function advanced by Fung,the vascular stress_strain relationship under equilibrium state was analyzed and the circumferential and axial elastic moduli were deduced that are expressed while the arterial strains around the equilibrium state are relatively small, so that the equations of vessel wall motion under the pulsatile pressure could be established *** solving both the vessel equations and the linear Navier_Stokes equations,the analytic expressions of the blood flow velocities and the vascular displacements were *** influence of the difference between vascular circumferential and axial elasticities on pulsatile blood flow and vascular motion was discussed in details.

关键词： pulse wave pulsatile blood flow strain energy function zero stress state

A COUPLING MODEL OF LEFT VENTRICLE AND ARTERIAL SYSTEM

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Acta Mechanica Sinica 1989年第3期5卷 285-292页

作者： Liu Zhaorong Zhou Yongsheng(Department of Applied Mechanics,Fudan University) Department of Applied Mechanics Fudan University Fudan China

A simple left ventricular model and a systemic arterial modelofa tapered tube with eight branches are used in this paper which are combined into a mathematical coupling model of heart and ar- terial system to study th... 详细信息

关键词： ventricular and vascular coupling mathematical model pulse wave afterload

Short pulse Width and High Peak Power 457 nm Deep Blue Laser with V-Type Cavity

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Journal of Applied Mathematics and Physics 2021年第11期9卷 2987-2994页

作者： Zhibin Zhao Cheng Cheng Hao Chen Quan Li Yi Qu Guojun Liu Zhongliang Qiao Baoxue Bo College of Opto-Electronic Engineering Changchun University of Science and Technology Changchun China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Physics and Electronic Engineering Hainan Normal University Haikou China

An intracavity frequency doubling acousto-optically Q-switched Neodymium-doped Yttrium Orthvanadate (Nd:YVO4) 457 nm blue laser by employing a three-mirror folded cavity was demonstrated. With the incident pump power of 40.4 W, the maximum average output power of 439 mW 457 nm laser, and the minimum pulse duration of 86.14 ns and the maximum peak power of 510 W were achieved at 10 kHz. The M2 factors are 1.23 and 1.61 in X and Y directions, respectively. The power stability in two hours is better than 2%.

关键词： Laser All-Solid-State Laser pulse wave Deep Blue Laser 457 nm Laser

Noninvasive Measurement of Blood Glucose by Dynamic pulse Impedance Spectroscopy

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Noninvasive Measurement of Blood Glucose by Dynamic Pulse Im...