Doctorat (Mathématiques): Recent submissions

  • Systèmes Dynamiques chaotiques et cryptographie 
    Berguellah, Nour Elhouda; Hamri, Nasr eddine (Université Frères Mentouri - Constantine 1, 2018-11-22)
    In this work we present two chaotic models used for secure transmission of a functional message which is the function sin ⍵t, without forgetting the role of synchronization mechanisms of chaotic systems to the success of ...
  • Résolutions de quelques équations différentielles fractionnaires sur l'espace d'Heisenberg. 
    Bekkar, Meneceur; Haouam, Kamel (Université Frères Mentouri - Constantine 1, 2018-10-25)
    This thesis is devoted to the study of the non‐existence problems of global solutions for some PDEs and partial differential systems with fractional derivatives with respect to time, the basic idea of proofs is based on ...
  • Sur les bialgèbres faibles et les algèbres de Hopf faibles. 
    Chebel, Zoheir; Makhlouf, Abdenacer (Université Frères Mentouri - Constantine 1, 2018-10-21)
    In this thesis, we study the structure of weak bialgebras and weak Hopf algebras. These structures appeared in Physics, in particular in renormalization in quantum fields theory and q-deformations of oscillator algebras. ...
  • حول الـ FC-زمر و الـ FNk-زمر في بعض فئات الزمر ذات النوع المنته 
    شلغا م, مراد; كرادة, محمد (Université Frères Mentouri - Constantine 1, 2018-11-04)
    The first axis consists of two parts, the first containing the definitions and characteristics of FC-groups. The second part showing the relationship between this class, the class of PE-groups and the problem of P. Erdös. ...
  • Chaos et synchronisation (généralisé) dans les systèmes dynamiques. 
    Gasri, Ahlem; Zeraoulia, Elhadj (Université Frères Mentouri - Constantine 1, 2018-07-12)
    In recent years, chaos synchronization has been widely explored and studied because of its potential applications, such as in secure communication, chemical reactions, biological systems, information science. Thereby, a ...
  • La théorie de la sentinelle et problème d’identification . 
    Sendel, Saida; Ayadi, Abdelhamid (Université Frères Mentouri - Constantine 1, 2018-03)
    The problems of identiÖcation consist to Önd the causes of a phenomenon on starting from an observation; the resolution of this problem is doing by an experimental measurements. In this work, we aim to estimate the shape ...
  • Systèmes dynamiques et chaos 
    Ouahabi, Rabiaa; Hamri, Nasr-Eddine (Université Frères Mentouri - Constantine 1, 2018-03-19)
    In this thesis we have addressed the problem of the control and the synchronization of the dynamic chaotic systems. This thesis is broken up into four parts. In the first part of the thesis we have given the definitions ...
  • Inférence statistique dans les équations différentielles stochastiques 
    Merahi, Fateh; Bibi, Abdelouahab (Université Frères Mentouri - Constantine 1, 2018-04-26)
    In this thesis, we are studying a class of continuous-time bilinear processes (COBL(1,1)) generated by some stochastic differential equations where we have investigate some probabilistic properties and statistical ...
  • L'évaluation des bornes du système hyper-chaotique de Lorenz-Haken. 
    Diar, Ahmed; Denche, Mohamed (Université Frères Mentouri - Constantine 1, 2018-02-21)
    The first part of this thesis is dedicated to the study a dynamic complex financial system, the boundedness of solutions of this system is concerned. We have obtained the ultimate bound for the system.Furthermore, its rich ...
  • Sur les techniques de modélisation des expériences numériques. 
    Azzizi, Norelhouda; Zaatri, Abdelouahab (Université Frères Mentouri - Constantine 1, 2017-07-13)
    In order to study any phenomenon and develop technological systems, researchers use certain experiments. However, the reduction in the number of experiments to be carried out with a view to inferring conclusions remains ...
  • Résolution des équations différentielles fractionnaires. 
    Tellab, Brahim; Haouam, Kamel (Université Frères Mentouri - Constantine 1, 2018-01-11)
    In this work we have studied the existence and non-existence of solutions of nonlinear fractional differential equations. For the study of the existence and uniqueness the fixed point theory has been applied and for ...
  • Sur les applications discrètes en dimension N, N>1. 
    Mammeri, Mohammed; Zeraoulia, Elhadj (Université Frères Mentouri - Constantine 1, 2017-12-14)
    This thesis has two main objectives: The first objective is to define sufficient conditions for the existence of bounded or unbounded orbits in the quadratic discrete map in 3-D. The second objective is to study some ...
  • Étude et mise en œuvre d’algorithmes d’optimisation pour résoudre certaines classes de problèmes pratiques 
    Aaid, Djamel; Ouanes, Mohand (Université Frères Mentouri - Constantine 1, 2017-06-29)
    In this thesis, we focused on a very interesting subject of application namely: the study and implementation of optimization algorithms to solve some classes of practical problems such as transport problems with capacity ...
  • L’approche neuronale de l’inférence statistique 
    Zerdazi, Dalel; Chibat, Ahmed (Université Frères Mentouri - Constantine 1, 2017-04-24)
    This thesis is an attemp t to contribute, even slightly, in situating the neural networks theory into the framework of applied statistics. Th e central issue of statistical inference was s tudied under the light of neural ...
  • Etude de modèles semi et non paramétriques pour des données censurées. 
    Boukeloua, Mohamed; Messaci, Fatiha; Keziou, Amor (Université Frères Mentouri - Constantine 1, 2017-04-17)
    In this dissertation, we are interested in kernel estimation of the density and the failure rate for c ensored data. There exist seve ral kinds of censorship and we fo cus on right, doubly and twi ce censored data mo de ...
  • Analyse numérique de quelques problèmes de contact 
    Fernane Khaireddine; Ayadi A. (Université Frères Mentouri - Constantine 1, 2012-07-04)
    In this thesis, we prove the convergence of a new variational formulation deduced from the one of the Hypersphere Dirichlet-Neumann type method. This approach allows a unilateral contact problem. The idea is to replace ...
  • Study of some integral inequalities and applications 
    Boudeliou, Ammar; Khellaf, Hassene (Université Frères Mentouri - Constantine 1, 2017-05-11)
    The aim of this thesis is to give an exposition of the classical results of some integral inequalities emerged in the mathematical literature in recent years; and to establish some new integral inequalities of Gronwall ...
  • Propriétés des opérateurs de dérivation et théorème de fugled-putnam 
    Mecheri Salah; Toualbia Abdelatif (Université Frères Mentouri - Constantine 1, 2017-01-01)
    The second chapter deals with the Jordan form of the generalized derivation operator’s (X)=AXXB and the elementary derivation operator (X)=AXB-CXD. In the third chapter we consider the pairs of operators (A,B) such as AT=TB ...
  • Modélisation mathématique des problèmes électro-élastique de contact avec frottement 
    Dalah Mohamed; Derbazi Ammar (Université Frères Mentouri - Constantine 1, 2017-01-01)
    The purpose of this disertation is to study two types of antiplan contact problems with friction between a deformable body and a foundation. We assume along this disertation that the process is static for electroelastic ...
  • Sur le problème de Cauchy pour l’ équation de Kac homogène sans troncature angulaire 
    Lekrine Nadia; Bouziani Abdelfatah (Université Frères Mentouri - Constantine 1, 2016-05-19)
    The thesis addresses several problems. It shows, in first time the existence and stability of the weak solution. Where the condition on the test function and on the initial datum was weaken and becomes optimal, thanks to ...

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