Abstract：
:This study proposed a revision to the Rosenstein's method of numerical calculation of the largest Lyapunov exponent (LyE) to make it more robust to noise. To this aim, the effect of increasing number of initial neighboring points on the LyE value was investigated and compared to values obtained by filtering the time series. Both simulated (Lorenz and passive dynamic walker) and experimental (human walking) time series were used to calculate the LyE. The number of initial neighbors used to calculate LyE for all time series was 1 (the original Rosenstein's method), 2, 3, 4, 5, 10, 15, 20, 25, and 30 data points. The results demonstrated that the LyE graph reached a plateau at the 15-point neighboring condition implying that the LyE values calculated using at least 15 neighboring points were consistent. The proposed method could be used to calculate more consistent LyE values in experimental time series acquired from biological systems where noise is omnipresent.
journal_name
J Biomechjournal_title
Journal of biomechanicsauthors
Mehdizadeh Sdoi
10.1016/j.jbiomech.2019.01.013subject
Has Abstractpub_date
2019-03-06 00:00:00pages
84-91eissn
0021-9290issn
1873-2380pii
S0021-9290(19)30046-6journal_volume
85pub_type
杂志文章abstract：:A new transducer was developed for in situ measurement of the force vector in a complex muscle. The transducer measures the magnitude, and the line of action of a force in a single plane. The dynamic range of the transducer is 0-5 N. This range includes the small forces developed by an active motor unit and the relati...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(96)84545-3
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abstract：:Catheter-delivered intravascular probes are widely used in clinical practice to measure coronary arterial velocity and pressure, but the artefactual effect of the probe on the variables being measured is not well characterised. A coronary artery was simulated with a 180 degrees curved tube 3mm in diameter and the effe...
journal_title：Journal of biomechanics
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journal_title：Journal of biomechanics
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journal_title：Journal of biomechanics
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doi：10.1016/j.jbiomech.2019.06.028
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2009.05.002
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2007.11.029
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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abstract：:The purpose of this paper is to investigate the theoretical basis for the pressure-distension behavior of the urinary bladder. A finite strain theory is developed for hollow spherical structures and it is shown that the Treloar model is a good prototype only for rubber balloons. The pressure-extension ratio relationsh...
journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：1983-01-01 00:00:00
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journal_title：Journal of biomechanics
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2011-01-04 00:00:00
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journal_title：Journal of biomechanics
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doi：10.1016/j.jbiomech.2010.03.031
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2004.05.003
更新日期：2005-03-01 00:00:00
abstract：:Currently available musculoskeletal inverse-dynamics thoracolumbar spine models are entirely based on data from adults and might therefore not be applicable for simulations in children and adolescents. In addition, these models lack lower extremities, which are required for comprehensive evaluations of functional acti...
journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2020-03-26 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(91)90375-w
更新日期：1991-01-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2005.10.026
更新日期：2006-01-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2013.10.017
更新日期：2014-01-03 00:00:00
abstract：:An experimental setup was developed for statically measuring seven vertical and three horizontal reaction forces on the foot. In the setup, the leg can be simultaneously loaded (1) by a vertical force, (2) by an externally applied axial moment, and (3) by simulated muscle forces. The foot is free to invert under influ...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(89)90080-8
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journal_title：Journal of biomechanics
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更新日期：1996-06-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2013.11.046
更新日期：2014-02-07 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2007.11.009
更新日期：2008-01-01 00:00:00
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journal_title：Journal of biomechanics
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doi：10.1016/j.jbiomech.2010.01.005
更新日期：2010-05-07 00:00:00
abstract：:The finite element (FE) method based on high-resolution peripheral quantitative computed tomography (HR-pQCT) use a variety of tissue constitutive properties and boundary conditions at different laboratories making comparison of mechanical properties difficult. Furthermore, the advent of a second-generation HR-pQCT po...
journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2018-10-26 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2002-03-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2011-09-23 00:00:00
abstract：:A finite element model of a bioprosthetic heart valve was developed to determine the influence of the stent height on leaflet stresses under various pressure loading conditions after valve closure. A nonlinear solution was used to obtain the stresses in the leaflets for stent heights of 14.6 mm, 19.0 mm and 22.0 mm re...
journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：1986-01-01 00:00:00
abstract：:Hyperelastic material models have been incorporated in the rotation-free, large deformation, shell finite element (FE) formulation of (Stolarski et al., 2013) and applied to dynamic simulations of aortic heart valve. Two models used in the past in analysis of such problem i.e. the Saint-Venant and May-Newmann-Yin (MNY...
journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2017-01-04 00:00:00
