Gelu Ionescu

Gelu Ionescu
GIPSA-lab · image processing

About

15
Publications
4,270
Reads
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94
Citations
Citations since 2017
3 Research Items
41 Citations
201720182019202020212022202302468
201720182019202020212022202302468
201720182019202020212022202302468
201720182019202020212022202302468

Publications

Publications (15)
Article
Full-text available
Interest in applications for the simultaneous acquisition of data from different devices is growing. In neuroscience for example, co-registration complements and overcomes some of the shortcomings of individual methods. However, precise synchronization of the different data streams involved is required before joint data analysis. Our article presen...
Conference Paper
The magnetic anisotropy in grain oriented FeSi alloys (FeSi GO) is very important nowadays, because these steels are usually used for their very good magnetic properties along the rolling direction (RD). In electrical devices the steel magnetic core is subjected to flux lines that are making an angle, different from 0° to the RD and to 2D magnetic...
Article
Full-text available
The Preisach model is widely used for hysteresis modeling in magnetic materials. The main difficulty of the scalar models is the computation of the distribution function (PDF). In this paper are presented two approaches for the calculus of the PDF, by using different sets of experimental data. The two implementations generate equation systems, base...
Conference Paper
Measurement performance evaluation is important, because measurement results depend usually on the method used for measurement. The analysis of the repeatability has to be made under some exact conditions: the same measurement procedure, observer, measuring instruments. Also using the same laboratory and conditions, the measurements must be repeate...
Article
Full-text available
In this paper it was studied the mathematical interpretation of the magnetic hysteresis in non-oriented silicon iron alloys. In the framework of loss separation concept the hysteresis, classical and excess energy losses have been analyzed. The hysteresis energy losses were determined using a computationally efficient classical Preisach model. The e...
Article
Full-text available
Reading on a web page is known to be not linear and people need to make fast decisions about whether they have to stop or not reading. In such context, reading, and decision-making processes are intertwined and this experiment attempts to separate them through electrophysiological patterns provided by the Eye-Fixation-Related Potentials technique (...
Conference Paper
In the aeronautical industry it is essential to use good inverter devices to obtain a sinusoidal three phase output voltage. The output voltage of those inverters has a large content of high-order harmonics. The amplitude of those harmonics must be reduced or, ideally, totally eliminated. In this paper we propose a method to achieve this goal by us...
Article
Full-text available
The energy losses and the permeability dependences of MnZn ferrite ring cores, industrial type N87 EPCOS (Siemens), has been studied at 20 mT at room temperature, 23°. The investigation has been performed by a fluxmetric method from direct current (DC) to 3 MHz. The behavior of the losses and permeability are presented by the identification of the...
Article
Full-text available
A toroidal sample of Co 67Fe 4B 14.5Si 14.5 amorphous alloy, transversally and longitudinally annealed, was tested to determine the variation of the energy loss as function of frequency in the range of 5 Hz to 5 MHz at a given magnetic flux density (5mT, 10mT, 20mT). The loss separation in the case of amorphous ribbon was made using Bertotti's theo...
Article
Full-text available
In the aeronautical industry it is essential to use good inverter devices to obtain a sinusoidal three phase output voltage. The output voltage of those inverters has a large content of high-order harmonics. The amplitude of those harmonics must be reduced or, ideally, totally eliminated. In this paper we propose a method to achieve this goal by us...
Article
The article treats the injection of a direct current through an above-ground circular plate earth electrode. A non-homogeneous soil of exponentially increasing conductivity is considered. The particularities of the problem allow the use of the separation of variables method for solving the homogeneous second order partial derivative equation (PDE)...
Conference Paper
Ultrasound (US) imaging could potentially play a major role in the field of Computer Assisted Surgery (CAS). For doctors and surgeons to make full use of CAS tools in planning and executing surgical operations, they also need user-friendly automatic software based on fast, precise and reliable registration algorithms. The main goal of this paper is...
Article
Full-text available
Echographical imaging could potentially play a major role in the field of Computer Assisted Surgery (CAS). For doctors and surgeons to make full use of this tool in planning and executing surgical operations, they also need user-friendly automatic software based on fast, precise and reliable algorithms. The main goal of this thesis is to take advan...

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