701 research outputs found

    Fractional Ostrowski type inequalities for functions whose derivatives are s-preinvex

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    In this paper, we establish a new integral identity, and then we derive some new fractional Ostrowski type inequalities for functions whose derivatives are s-preinvexpeerReviewe

    Some new Hermite–Hadamard type inequalities for functions whose nth derivatives are convex

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    We first create an integral identity for n-times differentiable functions. Relying on this identity, we establish some new Hermite–Hadamard type inequalities for functions whose nth derivatives are convex

    Neural Networks for Synthesis and Optimization of Antenna Arrays

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    This paper describes a usual application of back-propagation neural networks for synthesis and optimization of antenna array. The neural network is able to model and to optimize the antennas arrays, by acting on radioelectric or geometric parameters and by taking into account predetermined general criteria. The neural network allows not only establishing important analytical equations for the optimization step, but also a great flexibility between the system parameters in input and output. This step of optimization becomes then possible due to the explicit relation given by the neural network. According to different formulations of the synthesis problem such as acting on the feed law (amplitude and/or phase) and/or space position of the radiating sources, results on antennas arrays synthesis and optimization by neural networks are presented and discussed. However ANN is able to generate very fast the results of synthesis comparing to other approaches

    Artificial Neural Networks to aid defferentiation of Benign and Malignant Breast Tumors by Microwave Imaging

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    In this paper, we propose a method for discriminating between malignant and benign breast tumors, by exploiting the dielectric properties of these tumors. The proposed technique is based on neural networks approach. Simulation results are presented on a model developed using EM simulator (CST)

    Effects due to a scalar coupling on the particle-antiparticle production in the Duffin-Kemmer-Petiau theory

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    The Duffin-Kemmer-Petiau formalism with vector and scalar potentials is used to point out a few misconceptions diffused in the literature. It is explicitly shown that the scalar coupling makes the DKP formalism not equivalent to the Klein-Gordon formalism or to the Proca formalism, and that the spin-1 sector of the DKP theory looks formally like the spin-0 sector. With proper boundary conditions, scattering of massive bosons in an arbitrary mixed vector-scalar square step potential is explored in a simple way and effects due to the scalar coupling on the particle-antiparticle production and localization of bosons are analyzed in some detail

    Fractures de L’extrĂ©mitĂ© Inferieure du radius: Une Ă©tude rĂ©trospective comparative de technique KAPANDJI Vs les autres techniques du radius distal. A propos de 52 cas

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    Les fractures de l’extrĂ©mitĂ© distale du radius sont des fractures frĂ©quentes, du sujet jeune au sujet ostĂ©oporotique. Nous avons, pour cela, rĂ©alisĂ© une Ă©tude rĂ©trospective. 52 patients, de plus de 16 ans, victimes d’une fracture articulaire ou extra-articulaire du radius distal ; traitĂ©s chirurgicalement ont Ă©tĂ© inclus dans cette Ă©tude et rĂ©partis comme suit :▱ Groupe A : patients traitĂ©s par embrochage de type Kapandji▱ Groupe B : patients traitĂ©s par plaque vissĂ©e verrouillĂ©e▱ Groupe C : patients traitĂ©s par embrochage classiques▱ Groupe D : patients traitĂ©s par embrochage type HK 2▱ Groupe E : patients traitĂ©s par fixateurs externesDans notre Ă©tude la moyenne d’ñge Ă©tait de 39 ans et le sexe masculin Ă©tait prĂ©dominantLes patients Ă©taient opĂ©rĂ©s et revus en consultation entre 3 et 12 mois. Chaque patient Ă©tait Ă©valuĂ© par le score de DASH, et une radiographie du poignet de face et de profil Ă©tait Ă©galement rĂ©alisĂ©e. Les fractures type A2 selon la classification AO Ă©tait dominante avec un pourcentage de 54% des cas suivie par le type C1 17%, puis le type A3 Ă  9% des cas ; Pour la classification de CASTAING c’est le type 2 qui est le plus reprĂ©sentĂ© soit 53% des cas.Discussion : L’utilisation de la technique HK2 dans le traitement des fractures du radius distal, nous a donnĂ© de meilleurs rĂ©sultats par rapport Ă  l’ostĂ©osynthĂšse par embrochage de type Kapandji.Les rĂ©sultats de notre Ă©tude restent similaires Ă  ceux des autres Ă©tudes de la littĂ©rature recommandant le recours Ă  cette technique dans ce type de fracture.Les fractures de l’extrĂ©mitĂ© distale du radius sont des fractures frĂ©quentes, du sujet jeune au sujet ostĂ©oporotique. Nous avons, pour cela, rĂ©alisĂ© une Ă©tude rĂ©trospective. 52 patients, de plus de 16 ans, victimes d’une fracture articulaire ou extra-articulaire du radius distal ; traitĂ©s chirurgicalement ont Ă©tĂ© inclus dans cette Ă©tude et rĂ©partis comme suit :▱ Groupe A : patients traitĂ©s par embrochage de type Kapandji▱ Groupe B : patients traitĂ©s par plaque vissĂ©e verrouillĂ©e▱ Groupe C : patients traitĂ©s par embrochage classiques▱ Groupe D : patients traitĂ©s par embrochage type HK 2▱ Groupe E : patients traitĂ©s par fixateurs externesDans notre Ă©tude la moyenne d’ñge Ă©tait de 39 ans et le sexe masculin Ă©tait prĂ©dominantLes patients Ă©taient opĂ©rĂ©s et revus en consultation entre 3 et 12 mois. Chaque patient Ă©tait Ă©valuĂ© par le score de DASH, et une radiographie du poignet de face et de profil Ă©tait Ă©galement rĂ©alisĂ©e. Les fractures type A2 selon la classification AO Ă©tait dominante avec un pourcentage de 54% des cas suivie par le type C1 17%, puis le type A3 Ă  9% des cas ; Pour la classification de CASTAING c’est le type 2 qui est le plus reprĂ©sentĂ© soit 53% des cas.Discussion : L’utilisation de la technique HK2 dans le traitement des fractures du radius distal, nous a donnĂ© de meilleurs rĂ©sultats par rapport Ă  l’ostĂ©osynthĂšse par embrochage de type Kapandji.Les rĂ©sultats de notre Ă©tude restent similaires Ă  ceux des autres Ă©tudes de la littĂ©rature recommandant le recours Ă  cette technique dans ce type de fracture

    Input Frequencies Optimization Based on Genetic Algorithm for Maximal Mutual Information

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    Among encountered problems in digital and analog communications, there is mismatch between canals and sources. As regards theory of information, unfortunately, this mismatch found expression in information loss during transfer to reception side. In order to settle the problem, the solution consists in adjustment of probability law at source so that we maximize the mean mutual information. For a little number of symbols, either at emission or at reception, the work can be done analytically with some difficulties. Unfortunately, the problem have tendency to become more and more difficult and complicated as number of symbols increases. In this case and as alternative, we propose a non-traditional optimization method, namely genetic algorithm, which will express, with regard to our problem, all its efficiency through this paper with some conclusive applications

    EVALUATION OF SEMEN QUALITY IN RABBIT OF LOCAL ALGERIAN POPULATION AND SYNTHETIC LINE IN THE SUMMER SEASON: A COMPARATIVE STUDY

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    The aim of our study was to compare the libido and semen characteristics in 24 rabbits of local and synthetic line during summer season. Results showed that both breeds had similar (p ˃0.05) libido (13.92 vs 16.85 s). Gel free volume (0.88 vs. 0.87 mL), pH (7.51 vs. 7.65), and live sperm (56.21 vs. 55.88%) were similar. Local population had higher semen concentration (398.50 x106 /mL vs. 328.90 x106 /mL) and percentage of abnormal spermatozoa (36.54 vs 30.28%). Massal and individual motility (p=0.006 and p=0.008) were significantly increased in local population. Kinetic traits for Local population were significantly greater (P<0.05), except for VCL, ALH and BCF. We conclude that, rabbit bucks of local population had a good ability of adaptation to produce in a hot climate

    Spectrum of the Relativistic Particles in Various Potentials

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    We extend the notion of Dirac oscillator in two dimensions, to construct a set of potentials. These potentials becomes exactly and quasi-exactly solvable potentials of non-relativistic quantum mechanics when they are transformed into a Schr\"{o}dinger-like equation. For the exactly solvable potentials, eigenvalues are calculated and eigenfunctions are given by confluent hypergeometric functions. It is shown that, our formulation also leads to the study of those potentials in the framework of the supersymmetric quantum mechanics
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