Concept
Non-linear least squares
Related publications (238)
Definition of Accurate Reference Synchrophasors for Static and Dynamic Characterization of PMUs
Mario Paolone, Asja Derviskadic, Guglielmo Frigo, Marco Pignati, Daniele Colangelo
The calibration of phasor measurement units (PMUs) consists of comparing coordinated universal time time-aligned phasors (synchrophasors) measured by the PMU under test, against reference synchrophasors generated through a PMU calibrator. The IEEE Standard ...
Institute of Electrical and Electronics Engineers2017Direct unwrapped phase estimation in phase shifting interferometry using Levenberg-Marquardt algorithm
Pramod Rastogi, Rishikesh Dilip Kulkarni
An algorithm for the direct unwrapped phase estimation from the linearly phase shifted interferograms is presented. The temporal fringe intensity along each pixel is represented as a function of fringe amplitude, phase step and the searched phase. These pa ...
Iop Publishing Ltd2017Cardiovascular morphometry with high-resolution 3D magnetic resonance: First application to left ventricle diastolic dysfunction
Nikolaos Stergiopoulos, Orestis Vardoulis, Davide Piccini
In this study, an image-based morphometry toolset quantifying geometric descriptors of the left ventricle, aorta and their coupling is applied to investigate whether morphological information can differentiate between subjects affected by diastolic dysfunc ...
Elsevier2017Finite strain FFT-based non-linear solvers made simple
Computational micromechanics and homogenization require the solution of the mechanical equilibrium of a periodic cell that comprises a (generally complex) microstructure. Techniques that apply the Fast Fourier Transform have attracted much attention as the ...
Elsevier2017Testing parallaxes with local Cepheids and RR Lyrae stars
Stephan Morgenthaler, Mikaël Martino, Shuangqing Liao
Context. Parallaxes for 331 classical Cepheids, 31 Type II Cepheids, and 364 RR Lyrae stars in common between Gaia and the HIPPARCOS and Tycho-2 catalogues are published in Gaia Data Release 1 (DR1) as part of the Tycho-Gaia Astrometric Solution (TGAS). Ai ...
Edp Sciences S A2017Linear Parameter-Varying Kalman Filter for angular velocity estimation of a reaction sphere actuator for satellite attitude control
Alireza Karimi, Leopoldo Rossini, Guzmán Borque Gallego
This paper presents a novel angular velocity estimation strategy of a Reaction Sphere (RS) for satellite attitude control based on a Linear Parameter-Varying (LPV) Kalman Filter. The reaction sphere is a permanent magnet synchronous spherical actuator whos ...
IEEE2017AUTOREGRESSIVE MOVING AVERAGE GRAPH FILTERS A STABLE DISTRIBUTED IMPLEMENTATION
We present a novel implementation strategy for distributed autoregressive moving average (ARMA) graph filters. Differently from the state of the art implementation, the proposed approach has the following benefits: (i) the designed filter coefficients come ...
Ieee2017MMSE Denoising of Sparse and Non-Gaussian AR(1) Processes
Michaël Unser, Emrah Bostan, Pedram Pad, Pouria Tohidi
We propose two minimum-mean-square-error (MMSE) estimation methods for denoising non-Gaussian first-order autoregressive (AR(1)) processes. The first one is based on the message passing framework and gives the exact theoretic MMSE estimator. The second is ...
IEEE2016Stochastic Control-A Moment Approach to Sparse Control Design
We consider design of sparse controllers for a stochastic linear system with infinite horizon quadratic objective. We formulate the non-sparse optimal solution through a semidefinite program for the second order moments of the states and inputs. Given that ...
University of Minnesota2016Definition and assessment of reference values for PMU calibration in static and transient conditions
Mario Paolone, Guglielmo Frigo, Marco Pignati, Daniele Colangelo
The calibration of Phasor Measurement Units (PMUs) consists of comparing Coordinated Universal Time (UTC) time-stamped phasors (synchrophasors) estimated by the PMU under test, against reference synchrophasors generated through a PMU calibrator. The IEEE S ...
IEEE2016