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Mathematical analysis of an HIV infection model including quiescent cells and periodic antiviral therapy

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International Journal of Biomathematics 2017年第5期10卷 89-120页

作者： mahieddine Kouche Bilal Boulfoul Bedr'Eddine Ainseba Departernent de Mathernatiques Universite Badji-Mokhtar-Annaba BP 12 Annaba 22000 Algeria Facultd de Technologie Universite du 20 Aout 1955-Skikda Route d'El-hadaiek B.P. 26 Skikda Algeria Institut de Mathematiques de Bordeaux UMR CNRS 52 51 Case 36 Universite Victor Segalen Bordeaux 2 3 Ter Place de la Victoire F33076 Bordeaux Cedex France

In this paper, we revisit the model by Guedj et al. [J. Guedj, R. Thibaut and D. Commenges, Maximum likelihood estimation in dynamical models of HIV, Biometrics 63 （2007） 198-206; J. Guedj, R. Thibaut and D. Commenges, Practical identifiability of HIV dynamics models, Bull. Math. Biol. 69 （2007） 2493 2513] which describes the effect of treatment with reverse transcriptase （RT） inhibitors and incorporates the class of quiescent cells. We prove that there is a threshold value 7 of drug efficiency η such that if η 〉 7, the basic reproduction number R0 〈 1 and the infection is cleared and if η〈 η^-, the infectious equilibrium is globally asymptotically stable. When the drug efficiency function η（t） is periodic and of the bang-bang type we establish a threshold, in terms of spectral radius of some matrix, between the clearance and the persistence of the disease. As stated in related works [L. Rong, Z. Feng and A. Perelson, Emergence of HIV-1 drug resistance during antiretroviral treatment, Bull. Math. Biol. 69 （2007） 2027-2060; P. De Leenheer, Within-host virus models with periodic antiviral therapy, Bull. Math. Biol. 71 （2009） 189-210.], we prove that the increase of the drug efficiency or the active duration of drug must clear the infection more quickly. We illustrate our results by some numerical simulations.

关键词： HIV equilibria persistence stability semiflow

Assessment Parameters of the Application of Solar Cell Technologies in the Built Environment

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Journal of Energy and Power Engineering 2012年第4期6卷 530-535页

作者： ali Asghar mahieddine Emzinae Solar Energy Materials ＆ Devices Laboratory Masdar Institute of Science and Technology Masdar City P.O. Box 54224 Abu Dhabi UAE

This paper presents a comprehensive overview of the different requirements for applications of solar cells in the built environment, particularly for the MENA （Middle East and North Africa） region. The authors emphasize the assessment of parameters additional to the cost and efficiency of the cells to make a more informed choice of the PV technology to use in specific buildings. They also emphasize the need for the wide use ofphotovoltaics in the built environment to produce electricity in the GCC （Gulf Cooperation Council） region and briefly mention the efforts being made in this regard.

关键词： Photovoltaics built environment Masdar BIPV.

Total phenolic content and antioxidant activity of six wild Mentha species(Lamiaceae) from northeast of Algeria

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Asian Pacific Journal of Tropical Biomedicine 2016年第9期6卷 760-766页

作者： Amina Benabdallah Chaabane Rahmoune mahieddine Boumendjel Oumayma Aissi Chokri Messaoud Department of Biology and Ecology Laboratory of Ecotoxicology and Abiotic StressUniversity Frères Mentouri Constantine 1 Department of Agronomy Laboratory on Biodiversity and Ecosystems PollutionFaculty of Nature and Life SciencesUniversity Chadli Bendjedid El-Tarf Department of Biology Laboratory of Plant BiotechnologyNational Institute of Applied Science and Technology(INSAT)

Objective:To investigate the total phenolics,flavonoids and tannins content and the in vitro antioxidant activities of methanolic extracts of six wild Mentha species which are Mentha aquatica,Mentha arvensis,Mentha piperita,Mentha pulegium,Mentha rotundifolia and Mentha ***:The Folin–Ciocalteu method was used to determine the total phenols content while flavonoids were estimated according to the aluminum chloride colorimetric *** evaluate tannins content,vanillin and HCl were added to methanolic *** antioxidant potential was measured by 1,1-diphenyl-2-picrylhydrazyl radical scavenging,ferrous ion chelating and the inhibition of b-carotene bleaching ***:The methanol extracts of Algerian mints were rich in phenolic compounds and exhibited powerful antioxidant activity ranging from 7.5 mg/mL to 44.66 mg/mL,which varied significantly among *** aquatica stood out with efficient antioxidant ability which was correlated to the high total phenolics content,followed by Mentha arvensis and Mentha piperita with very close values,comparing to Mentha pulegium,Mentha rotundifolia and Mentha villosa with lowest ***:These results show that methanolic extracts of Mentha species from Algeria have a great potential of polyphenols which can be used as a natural food preservative and antioxidant source.

关键词： Mentha Phenols Flavonoids Tannins Antioxidant activity

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基于雷达观测的目标跟踪与评估系统

基于雷达观测的目标跟踪与评估系统

作者：那比尔（mahieddine MOHAMMED NABIL）哈尔滨工业大学

学位级别：硕士

多目标跟踪是指在传感器获取的带有噪声的测量基础上,建立被监测的多个目标的轨迹的过程。多目标跟踪对于军队以及民用监视具有重要的实际意义。多目标跟踪的战略目标是从获得的数据中追踪目标,这涉及到众多特别复杂的因素,例如跟踪目... 详细信息

多目标跟踪是指在传感器获取的带有噪声的测量基础上,建立被监测的多个目标的轨迹的过程。多目标跟踪对于军队以及民用监视具有重要的实际意义。多目标跟踪的战略目标是从获得的数据中追踪目标,这涉及到众多特别复杂的因素,例如跟踪目标的数量可变,传感器噪声,错误的警报以及数据关联的不确定性等。针对这些问题,本文选用概率假设密度滤波器作为核心方法,研究实现了以该滤波器为基础的多种状态估计算法。势概率假设密度滤波器也被认为是解决方案之一,但它比PHD滤波器在计算上更为复杂。同样地,我们也在本文中实现了针对该滤波器的状态估计。在概率假设密度滤波的实现方面,本文采用了粒子滤波实现的SMC-PHD滤波器,因为它能够与非线性和非高斯动力学联系在一起。之后,本文主要对四种状态估计方法进行了研究和对比。在多目标轨迹评估方面,本文使用OSPA以获得最佳轨迹集合距离,以评估两个轨迹集合的相似程度。最后,本文将上述算法研究集成于基于雷达传感器的目标跟踪演示系统中,以提供可视化的多目标跟踪结果和算法性能的多角度评估。

关键词：多目标跟踪 PHD滤波器 CPHD滤波器 OSPA 评估雷达

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工业计算机化数控标准——BCL

机械与电子 1991年第3期9卷 40-42页

作者： F.mahieddine D.C.Webb 车明康

1983年,电子工业协会(EIA)发表了RS--494标准,这个标准通常称为BCL(二进制刀具位置)数据交换格式。BCL是一种使NC工件编程格式标准化的方法,它的目的是消除使用多种后处理软件带来的开销和混乱,并使工件程序可以在不同机床之间移植。本... 详细信息

1983年,电子工业协会(EIA)发表了RS--494标准,这个标准通常称为BCL(二进制刀具位置)数据交换格式。BCL是一种使NC工件编程格式标准化的方法,它的目的是消除使用多种后处理软件带来的开销和混乱,并使工件程序可以在不同机床之间移植。本文简单回顾介绍了BCL,还讨论了BCL数据的性质、它的实现和它对NC工业的益处。

关键词：数控机床计算机化 BCL 数控标准

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陆上地震技术新进展

国外测井技术 2008年第2期23卷 62-69页

作者： Malik Ait-Messaoud Mohamed-Zerrouk Boulegroun Aziza Gribi Rachid Kasmi mahieddine Touami Boff Anderson Peter Van Baaren Adel EI-Emam Ghassan Rached Andreas Laake Stephen Pickering Nick Moldoveanu ali Ozbek Sonatrach公司阿尔及利亚阿尔及尔西方奇科公司阿联酋迪拜科威特石油公司科威特西方奇科公司英国Gatwick 西方奇科公司美国得克萨斯州休斯敦英国剑桥

先进的地震采集和处理技术已经应用于陆上。一种高保真度、高分辨率集成式单传感器系统目前已在陆上使用。该技术的出现标志着在勘探、开发和生产应用方面取得了重大进展。

关键词：地震技术陆上传感器系统地震采集高保真度高分辨率集成式应用