Πλοήγηση ανά Θέμα "Inverse problems"
Αποτελέσματα 1-20 από 21
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An Algorithm for the Closed-Form Solution of Certain Classes of Volterra–Fredholm Integral Equations of Convolution Type
(2022)In this paper, a direct operator method is presented for the exact closed-form solution of certain classes of linear and nonlinear integral Volterra–Fredholm equations of the second kind. The method is based on the existence ... -
Analysis of heat affected zone in Al1239 and Al2198 laser welds using inverse modeling
(2013)Case study analyses of Al2139 and Al2198 laser welds are presented. These analyses demonstrate the concept of constructing parameter spaces for prediction of properties within the Heat Affected Zone (HAZ) of welds using ... -
An analytical perspective on Bayesian uncertainty quantification and propagation in mode shape assembly
(2020)Assembling local mode shapes identified from multiple setups to form global mode shapes is of practical importance when the degrees of freedom (dofs) of interest are measured separately in individual setups or when one ... -
Applied Artificial Neural Networks and Genetic Algorithms in Simulation Strategy for Trajectory in Collaborative Robotic
(2021)This work proposes a solution for collaborative robotics, presenting some precautions with this new perspective of robotics and norm, trajectory planning and observed singularities. Also, it compares techniques for solving ... -
Assessment of natural and anthropogenic impacts in groundwater, utilizing multivariate statistical analysis and inverse distance weighted interpolation modeling: the case of a Scopia basin (Central Greece)
(2018)In Scopia basin, central Greece, a hydrochemical investigation was completed. Groundwater samples from 41 sites were used to assess the natural and anthropogenic impacts in groundwater, utilizing the principal component ... -
A conditional directional distance function approach for measuring tax collection efficiency: evidence from Spanish regional offices
(2021)This paper analyzes the evolution of the technical efficiency of Spanish regional tax offices with respect to the main devolved taxes for the period 2005–2014. We apply the conditional directional distance function ... -
Efficient techniques for bayesian inverse modeling of large-order computational models
(2013)Bayesian tools for inverse modeling are based on asymptotic approximations and Stochastic Simulation Algorithms (SSA). Such tools require a number of moderate to large number of system re-analyses. For large-order numerical ... -
Field scale assessment of the tsharp technique for thermal sharpening of modis satellite images using venµs and sentinel-2-derived ndvi
(2021)Remotely sensed-based surface temperature is an important tool for crop monitoring and has great potential for improving irrigation management. However, current thermal satellite platforms do not display the fine spatial ... -
Hierarchical Bayesian modeling framework for model updating and robust predictions in structural dynamics using modal features
(2022)The hierarchical Bayesian modeling (HBM) framework has recently been developed to tackle the uncertainty quantification and propagation in structural dynamics inverse problems. This new framework characterizes the ensemble ... -
Hierarchical Bayesian uncertainty quantification of Finite Element models using modal statistical information
(2022)This paper develops a Hierarchical Bayesian Modeling (HBM) framework for uncertainty quantification of Finite Element (FE) models based on modal information. This framework uses an existing Fast Fourier Transform (FFT) ... -
Hot Oxidation Resistance of a Novel Cast Iron Modified by Nb and Al Addition for Exhaust Manifold Applications
(2022)In this study, high-temperature oxidation behavior of ductile cast irons designed by Nb and Al addition (3.5 wt pct C, 4 wt pct Si, 1 wt pct Nb, 0 to 4 wt pct Al) is studied to develop an alloy that can perform better at ... -
Implications of subsoil-foundation modelling on the dynamic characteristics of a monitored bridge
(2019)Model updating based on system identification (SI) results is a well-established procedure to evaluate the reliability of a developed numerical model. In this inverse assessment problem, soil-foundation compliance is often ... -
Instrumented indentation of a non-equal biaxial prestretched hyperelastic substrate
(2016)The present work investigates the instrumented indentation of a prestretched hyperelastic substrate. The substrate is incompressible and has an elastic energy density which is isotropic in the reference frame. The analysis ... -
A Multirate Fully Parallel LDPC Encoder for the IEEE 802.11n/ac/ax QC-LDPC Codes Based on Reduced Complexity XOR Trees
(2021)This article proposes an encoding method based on a two-step encoding algorithm for the 12 quasi-cyclic (QC)-low-density parity-check (LDPC) (QC-LDPC) codes specified in the IEEE 802.11n/ac/ax standards. The proposed ... -
On the potential of dynamic sub-structuring methods for model updating
(2019)While purely data-driven assessment is feasible for the first levels of the Structural Health Monitoring (SHM) process, namely damage detection and arguably damage localization, this does not hold true for more advanced ... -
On the Sparsification of the Reluctance Matrix in RLCk Circuit Transient Analysis
(2018)The ever increasing frequency scaling of contemporary very large scale integrated circuits has introduced the necessity to factor in signal integrity the analysis of inductive effects arising within the different blocks ... -
Quantification of aleatory uncertainty in modal updating problems using a new hierarchical Bayesian framework
(2019)Identification of structural damage requires reliable assessments of damage-sensitive quantities, including natural frequencies, mode shapes, and damping ratios. Lack of knowledge about the correct value of these parameters ... -
Random vibration of linear systems with singular matrices based on Kronecker canonical forms of matrix pencils
(2021)A novel technique is developed for determining the stochastic response of linear dynamic systems with singular parameter matrices based on matrix pencil theoretical concepts and relying on Kronecker canonical forms (KCF). ... -
Real-time Bayesian parameter, state and input estimation using output-only vibration measurements
(2020)This paper presents a new sequential Bayesian method for the real-time estimation of state, input, parameters, and noise characteristics in dynamical systems using output-only measurements. It is an extension of the method ... -
Sensitivity issues concerning inverse heat transfer analysis of welds
(2009)The construction of a general parameterization for inverse analysis of welding processes using incomplete or minimal experimental data, although demonstrated in principle, has yet to be firmly established. The structure ...