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Endoscopic mucosal resection in the upper gastrointestinal tract

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World Journal of Gastroenterology 2008年第13期14卷 1984-1989页

作者： anis Ahmadi Peter Draganov Division Gastroenterology Hepatology and Nutrition University of Florida Gainesville Florida 32610 United States

Endoscopic mucosal resection （EMR） is a technique used to locally excise lesions confined to the mucosa. Its main role is the treatment of advanced dysplasia and early gastrointestinal cancers. EMR was originally described as a therapy for early gastric cancer. Recently its use has expanded as a therapeutic option for ampullary masses, colorectal cancer, and large colorectal polyps. In the Western world, the predominant indication for EMR in the upper gastrointestinal tract is the staging and treatment of advance dysplasia and early neoplasia in Barrett＇s esophagus. This review will describe the basis, indications, techniques, and complications of EMR, and its role in the management of Barrett＇s esophagus.

关键词： Endoscopic mucosal resection Mucosal resection Barrett's esophagus Barrett's dysplasia Therapeutic endoscopy

Iterative Selection of GOB Poles in the Context of System Modeling

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International Journal of Automation and computing 2019年第1期16卷 102-111页

作者： anis Khouaja Hassani Messaoud High Institute of Applied Science and Technology National Engineering School of Monastir (ENIM)

This paper is concerned with the problem of system identification using expansions on generalized orthonormal bases(GOB). Three algorithms are proposed to optimize the poles of such a basis. The first two algorithms determine a GOB with optimal real poles while the third one determines a GOB with optimal real and complex poles. These algorithms are based on the estimation of the dominant mode associated with a residual signal obtained by iteratively filtering the output of the process to be modelled. These algorithms are iterative and based on the quadratic error between the linear process output and the GOB based model output. They present the advantage to be very simple to implement. No numerical optimization technique is needed, and in consequence there is no problem of local minima as is the case for other algorithms in the literature. The convergence of the proposed algorithms is proved by demonstrating that the modeling quadratic error between the process output and the GOB based model is decreasing at each iteration of the algorithm. The performance of the proposed pole selection algorithms are based on the quadratic error criteria and illustrated by means of simulation results.

关键词： Generalized orthonormal bases(GOB) Laguerre functions Kautz functions pole estimation modelling identification

Coset Diagram for the Action of Picard Group on Q（i, √3）

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Algebra Colloquium 2016年第1期23卷 33-44页

作者： Qaiser Mushtaq Saima anis Department of Mathematics Quaid-i-Azam University Islamabad Pakistan Department of Mathematics COMSATS Institute of Information Technology Abbottabad Pakistan

In this paper coset diagrams, propounded by Higman, are used to investigate the behavior of elements as words in orbits of the action of the Picard group F = PSL（2, Z[i]） on Q（i, √3）. Graphical interpretation of amalgamation of the components of F is also given. Some elements a＋b√3/c of Q（i, √3） and their conjugates a-b√3/c a c over Q（i） have different signs in the orbits of the biquadratic field Q（i, √3） when acted upon by F. Such real quadratic irrational numbers are called ambiguous numbers. It is shown that ambiguous numbers in these coset diagrams form a unique pattern. It is proved that there are a finite number of ambiguous numbers in an orbit Fa, and they form a closed path which is the only closed path in the orbit Гa. We also devise a procedure to obtain ambiguous numbers of the form a-b√3/c, where b is a positive integer.

关键词： Picard group biquadratic field coset diagrams and ambiguous numbers

On Semilattice Decomposition of an Abel–Grassmann’s Groupoid

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Acta Mathematica Sinica,English Series 2012年第7期28卷 1461-1468页

作者： Madad KHAN Saima anis Department of Mathematics COMSATS Institute of Information Technology

In this paper, we have decomposed an AG-groupoid. Let S be an AG-groupoid with left identity and a relation γ be defined on S as： aγb if and only if there exist positive integers m and n such that b^m∈E （Sa）S and a^n ∈ （Sb）S for all a and b in S. We have proved that S/γ is a maximal separative Semilattice homomorphic image of S. Every AG-groupoid S is uniquely expressible as a semilattice Y of archimedean AG-groupoids Sa （a∈ Y）. The semilattice Y is isomorphic to S/γ and the Sγ （a ∈ Y） are the equivalence classes of S mod V.

关键词： AG-groupoid invertive law medial law congruence

Guillaume Broux-Quemerais,Sarah Kaakai, anis Matoussi,Wissal Sabbagh

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Probability, Uncertainty and Quantitative Risk 2024年第2期9卷 149-180页

作者： Guillaume Broux-Quemerais Sarah Kaakarl anis Matoussi Wissal Sabbagh Laboratoire Manceau de Mathematiques&FR CNRS No 2962 Institut du Risque et de I'AssuranceLeMansUniversityFrance Centre de Mathématiques Appliquees(CMAP) CNRSEcole polytechniqueInstitut Polytechnique de Paris91120 PalaiseauFrance

In this paper,we present a probabilistic numerical method for a class of forward utilities in a stochastic factor *** this purpose,we use the representation of forward utilities using the ergodic Backward Stochastic Differential Equations(eBSDEs)introduced by Liang and Zariphopoulou in[27].We establish a connection between the solution of the ergodic BSDE and the solution of an associated BSDE with random terminal time T,defined as the hitting time of the positive recurrent stochastic *** viewpoint based on BSDEs with random horizon yields a new characterization of the ergodic cost^which is a part of the solution of the *** particular,for a certain class of eBSDEs with quadratic generator,the Cole-Hopf transformation leads to a semi-explicit representation of the solution as well as a new expression of the ergodic cost>.The latter can be estimated with Monte Carlo *** also propose two new deep learning numerical schemes for ***,we present numerical results for different examples of eBSDEs and forward utilities together with the associated investment strategies.

关键词： Deep leaming scheme Forward utilities Ergodic BSDEs Markovian solution Deep learning algorithm

A column study of the hydro-mechanical behavior of mature fine tailings under atmospheric drying

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International Journal of Mining Science and Technology 2017年第2期27卷 203-209页

作者： anis Roshani Mamadou Fall Kevin Kennedy Department of Civil Engineering University of OttawaOttawa KIN 6N5Canada

In this paper, the hydro-mechanical behavior and physical properties of mature fine tailings(MFT) under atmospheric drying are investigated through a column study. In the study, evaporation takes place in the development of suction in the upper parts of the column and increasing suction leads to higher strength in the tailings. After 5 days, the suction in the first lift is around 17 k Pa in the upper part of the *** a second lift is added, the first lift initially loses strength but over a 30 days' period, the strength is recovered to its prior value and suction in the second lift reaches 500 k Pa. The vane shear strength values show a substantial increase in the strength of the MFT after 30 days under atmospheric drying and drainage. The 90% strength found in the column exceeds the threshold(5 k Pa). The hydraulic-mechanical properties of the deposited tailings are closely coupled due to several mechanisms, such as evaporation,drainage, self-consolidation, suction and crack development. The findings of this study will provide a better understanding of the placement behavior of multiple lifts of MFT and thus contribute to reclamation design standards and reduce the use of dedicated disposal areas.

关键词： Tailings Oil sand Environment Drying Multi-lift deposition

Complete Monotonicity of Functions Related to Trigamma and Tetragamma Functions

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Computer Modeling in Engineering & Sciences 2022年第4期131卷 263-275页

作者： Mona anis Hanan Almuashi Mansour Mahmoud Faculty of Science Mathematics DepartmentMansoura UniversityMansoura35516Egypt Faculty of Science Mathematics DepartmentJeddah UniversityJeddah21589Saudi Arabia Faculty of Science Mathematics DepartmentKing Abdulaziz UniversityJeddah21589Saudi Arabia

In this paper,we study the completely monotonic property of two functions involving the functionΔ(x)=[ψ′(x)]2+ψ″(x)and deduce the double inequality x^(2)+3x+3/3x^(4)(2x+1)^(2)0which improve some recent results,whereψ(x)is the logarithmic derivative of the Gamma ***,we deduce the completely monotonic degree of a function involvingψ′(x).

关键词： Trigamma function tetragamma function completely monotonic function completely monotonic degree inequality

Hepatitis C virus induced insulin resistance impairs response to anti viral therapy

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World Journal of Gastroenterology 2012年第3期18卷 212-224页

作者： Abdel-Rahman El-Zayadi Mahmoud anis Tropical Medicine Department Faculty of Medicine Ain-Shams University and Cairo liver center Tropical Medicine Department Faculty of Medicine Tanta University

Hepatitis C virus (HCV) infection is an important risk factor for insulin resistance (IR). The latter is the pathogenic foundation underlying metabolic syndrome, steatosis and cirrhosis, and possibly hepatocellular carcinoma (HCC). The interplay between genetic and environmental risk factors ultimately leads to the development of IR. Obesity is considered a major risk factor, with dysregulation of levels of secreted adipokines from distended adipose tissue playing a major role in IR. HCV-induced IR may be due to the HCV core protein inducing proteasomal degradation of insulin receptor substrates 1 and 2, blocking intracellular insulin signaling. The latter is mediated by increased levels of both tumour necrosis factor-α (TNF-α) and suppressor of cytokine signaling 3 (SOC-3). IR, through different mechanisms, plays a role in the development of steatosis and its progression to steatohepatitis, cirrhosis and even HCC. In addition, IR has a role in impairing TNF signaling cascade, which in turn blocks STAT-1 translocation and interferon stimulated genes production avoiding the antiviral effect of interferon.

关键词： Hepatitis C virus-chronic hepatitis C Insulin resistance Sustained virological response Homeostasis model assessment

Optimal Systematic Determination of Models' Base for Multimodel Representation: Real Time Application

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International Journal of Automation and computing 2014年第6期11卷 644-652页

作者： Majda Ltaief anis Messaoud Ridha Ben Abdennour Research Unit of Numerical Control of Industrial Processes National School of Engineers of Gabes University of Gabes St Omar Ibn El-Khattab6029 Gabes Tunisia

The multimodel approach is a powerful and practical tool to deal with analysis, modeling, observation, emulation and control of complex systems. In the modeling framework, we propose in this paper a new method for optimal systematic determination of models base for multimodel representation. This method is based on the classification of data set picked out of the considered system. The obtained cluster centers are exploited to provide the weighting functions and to deduce the corresponding dispersions and their models base. A simulation example and an experimental validation on a semi-batch reactor are presented to evaluate the effectiveness of the proposed method.

关键词： Multimodel approach identification classification weighting functions complex systems chemical reactor