A formal method for finite relation model based on symbolic logic

2011 ◽  
Author(s):  
Yang Liu ◽  
Jinzhao Wu
Keyword(s):  
Formal Method ◽  
Symbolic Logic ◽  
Model Based ◽  
Relation Model

Robust Face Super-Resolution via Position Relation Model Based on Global Face Context

2020 ◽  
Vol 29 ◽  
pp. 9002-9016
Author(s):  
Liang Chen ◽  
Jinshan Pan ◽  
Junjun Jiang ◽  
Jiawei Zhang ◽  
Yi Wu
Keyword(s):  
Super Resolution ◽  
Model Based ◽  
Relation Model

A Relation Model Based Spatial Grid Catalogue

2010 ◽  
Author(s):  
Zhou Huang ◽  
Zhiming Gui ◽  
Xuetong Xie ◽  
Dongxuan Tian ◽  
Lixia Liu ◽  
...  
Keyword(s):  
Model Based ◽  
Relation Model ◽  
Spatial Grid

Indeterminate direction relation model based on fuzzy description framework

2008 ◽  
Vol 51 (S1) ◽  
pp. 72-80 ◽  
Author(s):  
YaoLin Liu ◽  
JianHua He ◽  
Yan Yu ◽  
XinMing Tang
Keyword(s):  
Model Based ◽  
Relation Model ◽  
Description Framework ◽  
Fuzzy Description

Isovolumic pressure-to-early rapid filling decay rate relation: model-based derivation and validation via simultaneous catheterization echocardiography

2006 ◽  
Vol 100 (2) ◽  
pp. 528-534 ◽  
Author(s):  
Charles S. Chung ◽  
David M. Ajo ◽  
Sándor J. Kovács
Keyword(s):  
Time Constant ◽  
Causal Explanation ◽  
Left Ventricular Pressure ◽  
Left Ventricular ◽  
Linear Relations ◽  
Model Based ◽  
Relation Model ◽  
Valve Opening ◽  
Deceleration Time

Transmitral Doppler echocardiography is the preferred method of noninvasive diastolic function assessment. Correlations between catheterization-based measures of isovolumic relaxation (IVR) and transmitral, early rapid filling (Doppler E-wave)-derived parameters have been observed, but no model-based, causal explanation has been offered. IVR has also been characterized in terms of its duration as IVR time (IVRT) and by τ, the time-constant of IVR, by approximating the terminal left ventricular IVR pressure contour as P( t) = P∞ + Po e− t/τ, where P( t) is the continuity of pressure, P∞ and Po are constants, t is time, and τ is the time constant of IVR. To characterize the relation between IVR and early rapid filling more fully, simultaneous (micromanometric) left ventricular pressure and transmitral Doppler E-wave data from 25 subjects undergoing elective cardiac catheterization and having normal physiology were analyzed. The time constant τ was determined from the dP /d t vs. P (phase) plane and, simultaneous Doppler E-waves provided global indexes of chamber viscosity/relaxation ( c), chamber stiffness ( k), and load ( xo). We hypothesize that temporal continuity of pressure decay at mitral valve opening and physiological constraints permit the algebraic derivation of linear relations relating 1/τ to both peak atrioventricular pressure gradient ( kxo) and E-wave-derived viscosity/relaxation ( c) but does not support a similar, causal (linear) relation between deceleration time and τ or IVRT. Both predicted linear relations were observed: kxo to 1/τ ( r = 0.71) and viscosity/relaxation to 1/τ ( r = 0.71). Similarly, as anticipated, only a weak linear correlation between deceleration time and IVRT or τ was observed ( r = 0.41). The observed in vivo relationship provides insight into the isovolumic mechanism of relaxation and the changing-volume mechanism of early rapid filling via a link of the respective relaxation properties.

Sign in / Sign up

Export Citation Format

Share Document