A new System for offline Printed Arabic Recognition for Large Vocabulary : SPARLV

This paper presents a contribution for the Arabic printed recognition. In fact, we are interested in the printed decomposable Arabic word recognition. The proposed system uses the analytical approach through the segmentation into characters to succeed to a generation of letter hypotheses as well as word hypotheses using a lexical verification in a pre-established dictionary of the language. Our proposed system SPARLV is able to put valid hypotheses of words thanks to the lexical verification

Design study of a magnetoelectric-electromagnetic vibration energy converter for energy harvesting

The aim of this paper is to design a combination of a magnetoelectric-electromagnetic (ME-EM) vibration converter in order to reach an improved energy outcome. In this paper, the influence of magnets polarization and magnetoelectric transducer and coil direction are investigated. For this purpose, a finite element model is developed using one coil, one ME transducer in a magnetic circuit. Simulation results show that a better magnetic field distribution and variation is reached, if the magnetic circuit magnets are placed in attraction. Radial polarization shows decisive advantages in comparison with axial polarization. The placement of coil parallel to the magnetic circuit direction and the magnetization of the ME transducer along its width is the optimal direction relative to the magnetic circuit

Asymptotic Analysis of the Local Potential Approximation to the Wetterich Equation

This paper reports a study of the nonlinear partial differential equation that arises in the local potential approximation to the Wetterich formulation of the functional renormalization group equation. A cut-off-dependent shift of the potential in this partial differential equation is performed. This shift allows a perturbative asymptotic treatment of the differential equation for large values of the infrared cut-off. To leading order in perturbation theory the differential equation becomes a heat equation, where the sign of the diffusion constant changes as the space-time dimension $D$ passes through $2$. When $D<2$, one obtains a forward heat equation whose initial-value problem is well-posed. However, for $D>2$ one obtains a backward heat equation whose initial-value problem is ill-posed. For the special case $D=1$ the asymptotic series for cubic and quartic models is extrapolated to the small infrared-cut-off limit by using Pad\'e techniques. The effective potential thus obtained from the partial differential equation is then used in a Schr\"odinger-equation setting to study the stability of the ground state. For cubic potentials it is found that this Pad\'e procedure distinguishes between a $PT$-symmetric $ig\phi^3$ theory and a conventional Hermitian $g\phi^3$ theory ($g$ real). For an $ig\phi^3$ theory the effective potential is nonsingular and has a stable ground state but for a conventional $g\phi^3$ theory the effective potential is singular. For a conventional Hermitian $g\phi^4$ theory and a $PT$-symmetric $-g\phi^4$ theory ($g>0$) the results are similar; the effective potentials in both cases are nonsingular and possess stable ground states

Identification et analyse de textes arabes par approche affixale

Les travaux présentés dans ce mémoire abordent les problèmes liés à la différenciation et la reconnaissance de textes en mode hors-ligne dans des documents multilingues arabe et latin. La première partie de ces travaux concerne une méthode de différenciation entre les textes arabes et les textes latins dans les deux natures imprimée et manuscrite. La deuxième partie propose une nouvelle approche, appelée approche affixale, pour la reconnaissance de mots et l'analyse de textes arabes. Cette approche se distingue par la modélisation d'entités morphosyntaxiques (morphèmes de base du mot) en intégrant les aspects morpho-phonologiques du vocabulaire arabe dans le processus de reconnaissance par rapport aux approches classiques qui procèdent par la modélisation d'entités graphiques (mot, lettre, pseudo mot). Les tests réalisés montrent bien l'apport de l'approche au niveau de la simplification de la reconnaissance et la caractérisation morphosyntaxique des mots dans un texte arabe.The presented work in this memory tackles the problems involved in differentiation and text recognition in off-line mode in Arabic and Latin multilingual documents. The first part of this work relates to a method of differentiation between Arabic texts and Latin texts in two natures printed and handwritten. The second part proposes a new approach, called affixal approach, for Arabic word recognition and text analysis. This approach is characterized by modelling from morph-syntactic entities (word basic morphemes) by integrating the morpho-phonological aspects of Arabic vocabulary in the recognition process compared to the traditional approaches which proceed by the modelling of grahic entities (word, letter, pseudo word). The tests carried out show well the contribution of the approach on the recognition simplification and the morph-syntactic categorization of the words in an Arabic text.ROUEN-BU Sciences (764512102) / SudocROUEN-BU Sciences Madrillet (765752101) / SudocTOURS-Polytech'Informat.Product. (372612209) / SudocSudocFranceF

A New System for Offline Printed Arabic Recognition for Large Vocabulary: SPARLV

Abstract This paper presents a contribution for the Arabic printed recognition. In fact, we are interested in offline printed Arabic word recognition for a large vocabulary. The proposed system SPARLV uses the analytical approach through the segmentation into characters to succeed to a generation of letter hypotheses as well as word hypotheses using a lexical verification in a pre-established dictionary of the language. Our proposed system SPARLV is able to put valid hypotheses of words thanks to the lexical verification

Natural Language Morphology Integration in Off-Line Arabic Optical Text Recognition

International audienceIn this paper, we propose a new linguistic-based approach called the affixal approach for Arabic word and text image recognition. Most of the existing works in the field integrate the knowledge of the Arabic language in the recognition process in two ways: either in post-recognition using the language of dictionary (dictionary of words) to validate the word hypotheses suggested by the OCR or in the course of the recognition process (recognition directed by a lexicon) using a statistical model of the language (Hidden Markov Model or N-gram). The proposed approach uses the linguistic concepts of the vocabulary to direct and simplify the recognition process. The principal contribution of the proposed approach is to be able to categorize the word hypotheses in words that are either derived or not derived from roots and to characterize morphologically each word hypothesis in order to prepare the text hypotheses for later analyses (for example, syntactic analysis; to filter the sentence hypotheses)

Design study of a nonlinear electromagnetic converter using magnetic spring

In this paper, an experimental and theoretical study for designing a nonlinear electromagnetic converter-based magnetic spring is performed. The governing equation of the converter is investigated. A special focus is given to the magnetic force acting on the moving magnet in dependence of its volume and the geometry of the two fixed magnets, i.e., disc or ring. For the developed analytical and numerical model, the same converter volume has been used for all conducted investigations. Several parameters have been studied that can be used to tune the nonlinearity behavior. Further, the coil axial position was investigated analytically and experimentally. An energy harvesting prototype consisting of an oscillating cylindrical magnet levitated between two stationary magnets is fabricated and evaluated through experiments. The open-circuit voltage obtained through the analytical model has been compared to the experiment and solutions to tune the harvester resonant frequency while maintaining its output power density were proposed