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Communications in Computational Physics 2012年第2期11卷 456-471页

作者： abderrahmane Bendali M’Barek Fares Abdelkader Tizaoui Sebastien Tordeux Electromagnetism and Acoustics CERFACS42 Avenue Gaspard CoriolisF-31100 ToulouseFrance Toulouse University INSA-ToulouseMathematical Institute of ToulouseUMR-CNRS 5219135 avenue de RangueilF-31077 ToulouseFrance Laboratoire de Mathematiques et de leurs Applications UMR-CNRS 5142Universite de Pau et des Pays de l’AdourF-64013 PauFrance Project Team MAGIQUE-3D INRIA Bordeaux-Sud-OuestF-64013 PauFrance

In this article,we consider a domain consisting of two cavities linked by a hole of small *** derive a numerical method to compute an approximation of the eigenvalues of an elliptic operator without refining in the ne... 详细信息

关键词： Elliptic operator matched asymptotic expansions eigenvalue problem finite elements

WEIGHTED PSEUDO ALMOST-PERIODIC SOLUTIONS OF SHUNTING INHIBITORY CELLULAR NEURAL NETWORKS WITH MIXED DELAYS

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Acta Mathematica Scientia 2016年第6期36卷 1662-1682页

作者： Mohammed Salah M'HAMDI Chaouki AOUITI abderrahmane TOUATI Adel M. ALIMI Vaclav SNASEL Department of Mathematics University of Carthage Faculty of Sciences of Bizerta BP W 7021 Zarzouna Bizerta Tunisia REGIM-lab: Research Groups on Intelligent Machines University of Sfax National Engineering School of Sfax (ENIS) BP 1173 Sfax 3038 Tunisia VSB Technical University of Ostrava Czech Republic

In this paper, we prove the existence and the global exponential stability of the unique weighted pseudo almost-periodic solution of shunting inhibitory cellular neural networks with mixed time-varying delays comprising different discrete and distributed time delays. Some sufficient conditions are given for the existence and the global exponential stability of the weighted pseudo almost-periodic solution by employing fixed point theorem and differential inequality techniques. The results of this paper complement the previously known ones. Finally, an illustrative example is given to demonstrate the effectiveness of our results.

关键词： weighted pseudo almost-periodic solution shunting inhibitory cellular neuralnetworks mixed delays global exponential stability

Hele-Shaw装置中单一气泡近竖直壁面上升过程实验研究

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Hele-Shaw装置中单一气泡近竖直壁面上升过程实验研究

New design of ferroelectric solar cell combined with luminescent solar concentrator

第十二届全国流体力学学术会议

作者：菅振向诗评 abderrahmane Kherbeche Marie-Jean Thoraval 西安交通大学航天航空学院工程力学系机械结构强度与振动国家重点实验室国际应用力学中心 Université Paris-Est Laboratoire Géomatériaux et Environnement(EA4508)UPEM

本文利用高速摄像实验技术研究了二维Hele-Shaw装置中单一气泡近竖直壁面上升过程,建立了考虑附加质量效应的力平衡方程,查清了气泡几何及动力学特征量的时间演化规律,揭示了壁面对气泡上升动力学过程的影响机制。利用流变液,观察到了... 详细信息

本文利用高速摄像实验技术研究了二维Hele-Shaw装置中单一气泡近竖直壁面上升过程,建立了考虑附加质量效应的力平衡方程,查清了气泡几何及动力学特征量的时间演化规律,揭示了壁面对气泡上升动力学过程的影响机制。利用流变液,观察到了气泡上升过程清晰尾迹结构。实验中发现,气泡被释放后首先竖直上升,然后开始之字形摆动,并逐渐远离壁面。从尾迹结构的时空演化角度来看,气泡释放后首先形成直线尾迹,随后在气泡后部形成附着对称涡对,然后漩涡脱落触发之字形摆动,并最终形成卡门涡街,竖直壁面导致近壁区复杂尾迹结构的产生。

关键词：气泡 Hele-Shaw 壁面尾迹卡门涡街

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Chinese Physics B 2019年第8期28卷 417-424页

作者： Slimane Latreche Mohamed Fathi abderrahmane Kadri Unité de Développement des Equipements Solaires UDES/Centre de Développement des Energies RenouvelablesCDERTipaza 42415Algeria Laboratoire d'Etude des Matériaux Optoélectronique & Polymères Department of PhysicsUniversity of Oran 1 Ahmed Ben BellaBP 1524 El M'NaouerOran 31000Algeria

A new transparent photovoltaic panel composed of a luminescent solar concentrator and Al/BaTiO3/ZnO/Pt ferroelectric solar cells is presented,in which a portion of the incoming solar illumination is converted by the fluorophores to ultraviolet(UV)light which is then absorbed by ***,the solar cells are simulated using ***,the panel is modelled based on the obtained solar cell *** panel would be of great importance for building integrated photovoltaics domain because of its high transparency.

关键词： Atlas-Silvaco ferroelectric solar cell luminescent solar concentrator building integrated photovoltaic

MCNP Dose Calculations in a CT Phantom for Therapeutic External Photon Beam

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原子核物理评论 2011年第2期28卷 236-240页

作者： Lamyae El Gonnouni Tarek El Bardouni Mariam Zoubair Mohamed Idaomar abderrahmane Senhoo University Abdelmalek Essaadi Faculty of Sciences ERSN-LMR Department of Physics Tetuan Morocco University Abdelmalek Essaadi Faculty of Sciences BCM Department of Biology Tetuan Morocco National Institute of Oncology NIO Rabat Morocco

In this paper,we have addressed the problem of the radiation transport with the Monte Carlo N-particle(MCNP) *** is a general-purpose Monte Carlo tool designed to transport neutron,photon and electron in three dimensional *** examine the performance of MCNP5 code in the field of external radiotherapy,we performed the modeling of an Electron Density phantom(EDP) irradiated by photons from 60Co *** model was used to calculate the Percent Depth Dose(PDD) at different depths in an *** field size for PDD has been examined.A 60Co photons source placed at 80 cm source to surface distance(SSD).The results of calculations were compared to TPS data obtained at National Institute of Oncology of Rabat.

关键词： Monte Carlo method Monte Carlo N-particle electron density phantom radiotherapy CT percent depth dose

The Effects of Magnetic Dopant on the Structural and Electrical Properties in Superconducting YBaCu<sub>3</sub>O<sub>7-δ</sub>Ceramic

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Advances in Chemical Engineering and Science 2018年第1期8卷 1-10页

作者： Souheila Chamekh abderrahmane Bouabellou Thin Films and Interfaces Laboratory University of Constantine Constantine Algeria

The work reported in this paper aims at a better understanding of the magnetic doping effects on the structural and electrical properties for a series of YBa2(Cu1-xCox)3O7-δ ceramics. The Co doped YBa2Cu3O7-δ are (YBCO) prepared by conventional solid state reaction method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), differential thermal analysis (DTA) and resistivity measurements. The crystal lattice parameters are found to change due to the cobalt doping and tendency to a structure phase transition from orthorhombic to tetragonal, which is confirmed by the decrease of the degree of orthorhombicity. The morphology examination with SEM revealed gradual increases of grain size with x = 0.02 Co, a high porosity is observed in the doped samples compared to the pure one. The decomposition temperature of YBCO is pushed from temperatures above 975°C to lower temperatures of 945°C. The resistivity measurements of doped samples with x = 0.04 and 0.06;shows a deviation in from T-linear behavior due to the opening of a pseudogap.

关键词： YBCO Doped Co Electrical Properties Phase Transition High Tc Superconductivity

Darier-Ferrand Dermofibrosarcoma: A Case Report of a Cervical Localization

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International Journal of Otolaryngology and Head & Neck Surgery 2023年第5期12卷 317-325页

作者： Aminata Mbaye Ndiassé Ndiaye Ndeye Fatou Thiam Ousmane Sano Rachid Vitamine Mouhamed Salem Ould abderrahmane Maïmouna Diagne Malick Ndiaye ENT Department Thiès Regional Hospital Thies Senegal ENT Department Ouakam Military Hospital Dakar Senegal Radiology Department Thies Regional Hospital Thies Senegal ENT Department Diamniadio Children’s Hospital Dakar Senegal

Darier-Ferrand dermatofibrosarcoma (DFS) is a cutaneous mesenchymal tumor of intermediate malignancy. It is a rare but not exceptional tumor, accounting for 0.1% of malignant skin tumors. Histological examination is essential for diagnosis. Wide surgical excision is the standard treatment. DFS is a tumor whose prognosis and evolutionary risk are mainly linked to the delay in diagnosis and the quality of the first excision. Late diagnosis makes excision and reconstruction surgery difficult. The chances of recovery in the case of well-performed primary surgery are significantly greater than in the case of salvage surgery. To improve prognosis, early, codified, multidisciplinary management is essential. In our African context, and especially in the case of patients living in rural areas, errant diagnoses are often found hence the importance of raising awareness and providing information to healthcare personnel. We report a case of an enlarged left supraclavicular Darier-Ferrand dermatofibrosarcoma. The patient had come for a late consultation at a stage when the tumour was large. The CT scan was a great help in the pre-operative phase. The patient underwent complete surgical excision, the postoperative course was straightforward and the histology of the surgical specimen confirmed the diagnosis. The resection margins were healthy. The patient is alive at one year with no recurrence or metastasis.

关键词： Cervical Localization Dermatofibrosarcoma Skin Tumor Wide Surgery

Dormancy of Fig Cultivated under Moroccan Conditions

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American Journal of Plant Sciences 2012年第4期3卷 473-479页

作者： Ahmed Oukabli abderrahmane Mekaoui Plant Breeding and Genetic Resources Regional Agricultural Research Centre of Meknes Meknes Morocco

Fig (Ficus carica L.) is a deciduous species well adapted to Mediterranean conditions but its chilling requirement is still not well understood. The present study examines the pattern of bud-break in seven fig cultivars over two years under Moroccan conditions. Evaluation of dormancy behavior was made using a biological test known as “single node cuttings” carried out under controlled conditions. The responses of cultivars from Morocco, Italy, Spain and France were assessed. The period from full leaf fall to bud-break was characterized by a small variation (10 - 20 days) which did not appear to reflect the origin of the cultivars. Steady-sates were at high level in the middle of December or in January depending on the year. During the cold period, MTB didn’t exceed 200 days for “Borjassate noire”, “Ournakssi” and “Kadota” and varied from 100 to 128 days for the other cultivars. Therefore, dormancy was not deep and its period was short. Forcing bud during the coldest period allowed to a bud break but it didn’t exceed 10% and dormancy wasn’t complete. Missing bud break wasn’t observed and the geographic origin of examined cultivars didn’t seem to determine the length, and the deepness of bud dormancy. Bud-break occurred within a month of last leaf fall in the cultivars, indicating that they were all suited to commercial production in Morocco. Apparently, bud-break is more reliable in fig than it is in other Rosaceous species in this environment.

关键词： Fig Dormancy Bud Break Varieties Behaviour

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基于调性分析的唱歌旋律识别技术

基于调性分析的唱歌旋律识别技术

作者： Rachid abderrahmane 厦门大学

学位级别：硕士

任何歌唱片段都可能包含两种旋律:实际哼唱旋律和期望哼唱旋律。它们之间的区别在于,前者将每个哼唱音符的绝对音高作为哼唱歌旋律音符的音高,而后者将调性音级作为音符的音高。本文将期望哼唱旋律视为哼唱片段的正确旋律,提出了—种基... 详细信息

任何歌唱片段都可能包含两种旋律:实际哼唱旋律和期望哼唱旋律。它们之间的区别在于,前者将每个哼唱音符的绝对音高作为哼唱歌旋律音符的音高,而后者将调性音级作为音符的音高。本文将期望哼唱旋律视为哼唱片段的正确旋律,提出了—种基于哼唱旋律调性分析的哼唱音符分析方法。设计并实现了哼唱旋律自动识别系统和系统性能评估方法。通过分析相邻或“间邻”哼唱音符的音程,可以估算出最匹配的哼唱旋律片段的调性。通过比较传统的实际哼唱旋律和期望旋律的估算结果,建立了一种新的评估哼唱旋律的方法。新的评估方法涉及评估描述哼唱旋律线准确性的演算音程正确率以及评估反映系统自动修正能力的音程自动校正率。

关键词：哼唱旋律识别调性分析音调调性认知计算声音信号处理

Grain Design and Optimization Method of A Single Chamber Multi-thrust Solid Rocket Motor

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Grain Design and Optimization Method of A Single Chamber Mul...

作者： Zanat abderrahmane 北京理工大学

学位级别：硕士

装药的几何形状的确定是固体火箭发动机设计的一个重要环节,装药的几何形状的计算精度决定了发动机性能预示精度。只有确定了发动机装药结构,才能在发动机设计中获得所需要的燃面和弹道性能。本文中,针对不同类型的固体推进剂,设计了几... 详细信息

装药的几何形状的确定是固体火箭发动机设计的一个重要环节,装药的几何形状的计算精度决定了发动机性能预示精度。只有确定了发动机装药结构,才能在发动机设计中获得所需要的燃面和弹道性能。本文中,针对不同类型的固体推进剂,设计了几种插槽(径向和纵向)。本文的研究目的是优化单室多推力固体火箭发动机中药柱的开槽尺寸。首先将自变量为药柱开槽的几何尺寸的数学函数设置为目标函数,然后设置优化条件和初始参数,用MATLAB编程得出参数(槽长,槽深和槽弧半径)的最优解,最后将该优化方法应用到星形药柱上,并计算出弹道参数。

关键词：固体火箭发动机SRM 槽主要尺寸优化目标函数单腔多的推力