Comparing parametric models for reliability data via residual analysis

Abstract:Long-term regulation of beat-to-beat variability involves several different kinds of controls. A linear approach performed by parametric models enhances the short-term regulation of the autonomic nervous system. Some non-linear long-term regulation can be assessed by the chaotic deterministic approach applied to the beat-to-beat variability of the discrete RR-interval series, extracted from the ECG. For chaotic deterministic systems, trajectories of the state vector describe a strange attractor characterized by a fractal of dimension D. Signals are supposed to be generated by a deterministic and finite dimensional but non-linear dynamic system with trajectories in a multi-dimensional space-state. We estimated the fractal dimension through the Grassberger and Procaccia algorithm and Self-Similarity approaches of the 24-h heart-rate variability (HRV) signal in different physiological and pathological conditions such as severe heart failure, or after heart transplantation. State-space representations through Return Maps are also obtained. Differences between physiological and pathological cases have been assessed and generally a decrease in the system complexity is correlated to pathological conditions.

Download Full-text

Reliability Data Collection and Use in Risk and Availability Assessment

10.1007/978-3-642-82773-0 ◽

1986 ◽

Cited By ~ 5

Keyword(s):

Data Collection ◽

Reliability Data ◽

Availability Assessment

Download Full-text

Structural-parametric model of an electroelastic actuator for nanomechanics

10.36652/0042-4633-2020-8-3-11 ◽

2020 ◽

pp. 3-11

Author(s):

S.M. Afonin

Keyword(s):

Transfer Function ◽

Piezoelectric Actuator ◽

Transfer Functions ◽

Piezoelectric Effect ◽

Parametric Model ◽

Elastic Compliance ◽

Parametric Models ◽

Piezo Actuator ◽

Structural Scheme ◽

Model Transfer

Structural-parametric models, structural schemes are constructed and the transfer functions of electro-elastic actuators for nanomechanics are determined. The transfer functions of the piezoelectric actuator with the generalized piezoelectric effect are obtained. The changes in the elastic compliance and rigidity of the piezoactuator are determined taking into account the type of control. Keywords electro-elastic actuator, piezo actuator, structural-parametric model, transfer function, parametric structural scheme

Download Full-text