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作者： JAMAL ait LAADAM 吉林大学

学位级别：硕士

从非洲统一组织(OAU)承认西撒哈拉独立时起,摩洛哥政府正式脱离该组织,成为唯一一个排除在该组织外部的非洲国家。而自从1975年西班牙将西萨哈拉的领土主权交予摩洛哥以来,西撒哈拉这片土地便一直富有争议。在这个背景下,阐明阿尔及利... 详细信息

从非洲统一组织(OAU)承认西撒哈拉独立时起,摩洛哥政府正式脱离该组织,成为唯一一个排除在该组织外部的非洲国家。而自从1975年西班牙将西萨哈拉的领土主权交予摩洛哥以来,西撒哈拉这片土地便一直富有争议。在这个背景下,阐明阿尔及利亚非国家行为体(NSA)"Numhyd"石油公司所扮演的角色,以及它促使摩洛哥最终退出非洲统一组织的策略显得尤为重要,这也是本文所集中讨论的主要问题。阿尔及利亚非国家行为体极大程度地间接破坏和影响了摩洛哥对西撒哈拉的外交政策。随之而来的是1975年年底发生在摩洛哥与其对手波利萨里奥阵线(SADR)之间的冲突。阿尔及利亚是对波利萨里奥阵线在军事、财务、后勤以及外交层面上的最大支持者。本论文的主要目的是阐明阿尔及利亚如何通过利用西撒哈拉非国家行为体,在领土问题上削弱摩洛哥外交政策的效力。然而,要以长远的眼光看待阿尔及利亚介入西撒哈拉冲突一事,尤其是在地缘政治和经济方面,它的影响不仅仅局限于地区之中,更会影响整个非洲大陆。摩洛哥王国和国际社会无法接受阿尔及利亚政府支持并游说他国承认阿拉伯撒哈拉民主共和国(SADR)是独立国家,阿尔及利亚的这种行为违反了国际法和国际惯例。因此,本论文将研究阿尔及利亚的策略,其借助西撒哈拉领土达到削弱摩洛哥的目的的具体举措,对马格里布地区产生的影响,以及国际社会对摩洛哥的认知。本论文以阿尔及利亚非国家行为体所扮演的角色及其对外交政策的影响为基本框架。阿尔及利亚的“Numhyd”公司(Numhyd公司主要从事阿尔及利亚和摩洛哥西撒哈拉地区天然气和石油的勘探与开采;此外,Numhyd公司也是石油企业在非洲石油国家的子公司)是本研究中的非国家行为体。本论文解释了阿尔及利亚政府如何利用Numhyd公司支持波利萨里奥阵线和执行其在西撒哈拉的外交政策。本论文采用单一案例研究分析法。研究Numhyd公司作为阿尔及利亚政府外交政策的工具所发挥的作用。本文使用一手材料和二手材料。一手数据包括政府文件和对摩洛哥王国外交部官员的采访。二手材料包括书籍、文章、期刊、报告和网络材料。文献部分调研相关文献研究利益集团影响摩洛哥外交决策的效力。到目前为止,利益集团或阿尔及利亚非国家行为体为我们提供了以下几个变量:利益集团类型、利益集团的金融资源和其在事件中发挥的游说作用。这些变量将是一大亮点,通过一个新视角与文献综述中的理论含义相关联。有关这一区域尤其是西撒哈拉地区的争议由来已久。首先,非洲统一组织承认西撒哈拉独立,由于是阿尔及利亚利益集团的代表,阿拉伯撒哈拉得到了阿尔及利亚对其国家地位的承认并且得到了大量的资金援助。另一个争议则是阿尔及利亚通过“numhyd”石油公司来削弱和妨碍摩洛哥涉及到国内事务的对外政策的执行。另外,阿尔及利亚的外部势力严重妨害了摩洛哥针对非洲统一组织的政策。第三个争议是阿尔及利亚通过鼓吹阿拉伯撒哈拉民主共和国享有自治权来对抗摩洛哥王国以获取西撒哈拉的自然资源以及大西洋上的出海权。最终,摩洛哥政府解决问题时并没有像美国、欧洲和海湾阿拉伯国家依赖其盟友一样依赖非洲统一组织成员国。本论文由五个章节组成,其中包括一个总结全文的结论段。第一章节将会对非洲统一组织的定义,西撒哈拉议题的具体历史背景进行简短的介绍。另外,从摩洛哥和非洲统一组织成员国接受阿拉伯撒哈拉民主共和国作为一个独立国家和承认西撒哈拉地区所存在的分歧来展示非洲统一组织的功能主义的一面。本论文将会进一步探究西撒哈拉冲突和非洲统一组织关系的未知问题,突出被现有研究成果忽视之处。这一章节还包括理论视角,强调和解释非国家行为体影响对外政策这一概念的使用,以及强调和描述利益集团在塑造和影响摩洛哥对于西撒哈拉的外交政策方面发挥的重要的作用。第二个章节则是对于阿尔及利亚和摩洛哥之间关系的概念性分析,以及阿尔及利亚和摩洛哥紧张态势背后的历史渊源。另外还就阿尔及利亚政府通过资金支持波利萨奥阵线、宣称西撒哈拉是独立国家而干涉摩洛哥内部事务进行分析。第三个章节则考察阿尔及利亚利益集团的重要作用以及其发挥作用的途径,尤其针对西撒哈拉存在争议的领土。事实上,利益集团或是所谓的非国家行为体已经能够影响对摩洛哥对外政策决议有影响的西撒哈拉地区。除此之外,并不隶属于阿尔及利亚政府的利益集团为了获得更多的经济回报,进而充当阿尔及利亚政府妨害摩洛哥决议的有效工具。第四章则是与本论文主题相符合的案例研究,并且将着重强调阿尔及利亚的利益集团在摩洛哥脱离非洲统一组织中所发挥的作用。案例分析将以非洲统一组织在解决非洲问题之西撒哈拉议题上的定位失败为例。同时案例研究也将会回答以下问题,即利益集团为什么以及如何影响有关撒哈拉地区的对外政策的制定者。摩洛哥将通过向国际社会和联合国发表演说使阿尔及利亚停止干涉别国内部事务尤其是西撒哈拉领土来表明摩洛哥在西撒哈拉问题上的战略定位。第

关键词：西撒哈拉摩洛哥非国家组织阿尔及利亚非洲统一组织波利萨里奥阵线

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基于能量检测的增强双门限频谱感知算法研究

基于能量检测的增强双门限频谱感知算法研究

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作者： ait mesbah Omar 哈尔滨工业大学

学位级别：硕士

射频(RF)频谱是一种有限的自然资源,它需要更有效地利用,以便以更高的数据速率向大量用户提供多样化的服务。由于无线宽带,多媒体用户和应用程序市场的迅速扩大,人们对这种宝贵的无线电资源的需求正在增加。在这种有限的资源中容纳更多... 详细信息

射频(RF)频谱是一种有限的自然资源,它需要更有效地利用,以便以更高的数据速率向大量用户提供多样化的服务。由于无线宽带,多媒体用户和应用程序市场的迅速扩大,人们对这种宝贵的无线电资源的需求正在增加。在这种有限的资源中容纳更多的无线应用程序似乎更具挑战性。然而,由于给定频谱分段和标准化无线系统的专用频率分配,可用频谱资源正变得日益匮乏。认知无线电(CR)技术是一种试图利用动态频谱管理原理来解决频谱拥塞和频谱利用不足之间的矛盾的频谱接入新策略,它允许CR用户适时地使用主用户的许可频谱(PU)。CR技术的一个关键要求是在短时间内实现频谱的无占用,同时避免对PU的干扰。这种能力直接取决于频谱感知,而频谱感知是决定CR系统可靠性的最重要步骤。CR频谱感知的一个巨大挑战是能够在短时间内精确检测主发射机的状态。频谱感知技术主要集中在主发射机检测上,其中包括匹配滤波器检测(MFD),循环平稳特征检测,能量检测(ED)等。能量检测(ED)由于具有广泛的适用性和简单性以及计算和实施成本低等优点,而成为了一种普及的CR频谱感知技术。然而,传统的ED方案对噪声不确定性效应敏感,由于噪声比(SNR)壁的存在,使得PU检测不具有鲁棒性,噪声功率的微小波动可能导致能量检测性能的显着下降。针对ED对噪声不确定性敏感的缺点,提出了双阈值,动态双阈值等好几算法。本文广泛地研究了频谱感知与能量检测技术。提出了一种新的基于能量检测技术框架的双阈值算法,并利用MATLAB2016a进行了仿真研究与分析。该算法提出了在协同感知下增加样本数量的方法来进行重新感知,成功提高了检测概率。这里使用“或”规则来决定主用户是否存在。将该方法的性能与现有的双阈值技术进行比较,在不考虑噪声不确定性的情况下,该方法在检测概率方面有了明显的提高。

关键词：认知无线电协作频谱感知能量检测方法双阈值检测方法

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Facebook策略对摩洛哥消费者购买行为的影响研究

Facebook策略对摩洛哥消费者购买行为的影响研究

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作者： Meriem ait ABDELKADER 江西财经大学

学位级别：硕士

Facebook是一个广泛使用的社交媒体平台,人们通常会在其中花费大量时间。目前,它被认为是通过基于人工智能的定向控制在全球范围内传播信息的好方法。因此,由于Facebook在全球范围内拥有庞大的受众群体,它在业务扩展方面也发挥着至关重... 详细信息

Facebook是一个广泛使用的社交媒体平台,人们通常会在其中花费大量时间。目前,它被认为是通过基于人工智能的定向控制在全球范围内传播信息的好方法。因此,由于Facebook在全球范围内拥有庞大的受众群体,它在业务扩展方面也发挥着至关重要的作用。如今,为了快速轻松地接触到这些客户,世界各地的商人都在利用Facebook作为营销目的的最佳工具之一。在摩洛哥,几乎每个拥有智能手机或可以访问互联网的人都使用Facebook作为他们的主要社交网站。Facebook的这种频繁使用应该会对数字营销产生影响。在本文中,我们试图通过在线调查和一些面对面的访谈来评估Facebook营销对孟加拉国客户购买行为的影响。二手数据也来自现有研究、期刊论文、在线报告和网站。经过分析,可以说Facebook Marketing拥有一系列积极的客户反馈,对摩洛哥的客户购买行为有很大影响。从现有客户的正面评价来看,也可以说新客户的影响率也非常高。

关键词： Facebook 营销客户购买行为社交媒体

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Kupffer cell restoration after partial hepatectomy is mainly driven by local cell proliferation in IL-6-dependent autocrine and paracrine manners

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Cellular & Molecular Immunology 2021年第9期18卷 2165-2176页

作者： Yeni ait Ahmed Yaojie Fu Robim M.Rodrigues Yong He Yukun Guan Adrien Guillot Ruixue Ren Dechun Feng Juan Hidalgo Cynthia Ju Fouad Lafdil Bin Gao Laboratory of Liver Diseases National Institute on Alcohol Abuse and AlcoholismNational Institutes of HealthBethesdaMDUSA UniversitéParis-Est-Créteil CréteilFrance Universitat Autònoma de Barcelona BarcelonaSpain Department of Anesthesiology McGovern Medical SchoolUniversity of Texas Health Science Center at HoustonHoustonTXUSA INSERM U955 Institut Mondor de Recherche BiomédicaleCréteilFrance Institut Universitaire de France(IUF) ParisFrance

Kupffer cells(KCs),which are liver-resident macrophages,originate from the fetal yolk sac and represent one of the largest macrophage populations in the ***,the current data on the origin of the cells that restore macrophages during liver injury and regeneration remain ***,we address the question of whether liver macrophage restoration results from circulating monocyte infiltration or local KC proliferation in regenerating livers after partial hepatectomy(PHx)and uncover the underlying *** using several strains of genetically modified mice and performing immunohistochemical analyses,we demonstrated that local KC proliferation mainly contributed to the restoration of liver macrophages after *** KC proliferation was impaired in Il6-knockout(KO)mice and restored after the administration of IL-6 protein,whereas KC proliferation was not affected in Il4-KO or Csf2-KO *** source of IL-6 was identified using hepatocyte-and myeloid-specific Il6-KO mice and the results revealed that both hepatocytes and myeloid cells contribute to IL-6 production after ***,peak KC proliferation was also impaired in myeloid-specific Il6 receptor-KO mice after PHx,suggesting that IL-6 signaling directly promotes KC *** using several inhibitors to block the IL-6 signaling pathway revealed that sirtuin 1(SIRT1)contributed to IL-6-mediated KC proliferation in *** deletion of the Sirt1 gene in myeloid cells,including KCs,impaired KC proliferation after *** conclusion,our data suggest that KC repopulation after PHx is mainly driven by local KC proliferation,which is dependent on IL-6 and SIRT1 activation in KCs.

关键词： IL-6 Sirtuin 1 Liver regeneration Kupffer cells Myeloid cells

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Theoretical Investigation of Electronic and Optical Properties of Si/SiGe Quantum Cascade Structures

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Advances in Materials Physics and Chemistry 2013年第1期3卷 19-24页

作者： Khadidja Zellat Belabbes Soudini Salah Mohamed ait Cheikh Applied Materials Laboratory (AML) University of Sidi Bel Abbès Sidi Bel Abbès Algeria Laboratoire de Dispositifs de Communication Conversion Photovoltaique Ecole Nationale Polytechnique Algiers Algeria

This paper reviews the basic properties of the SiGe alloy, presents some new results on its electronic and optical properties, and discusses the approach that has been followed to model quantum wells containing SiGe layers for applications in quantum cascade lasers. The shape of the confining potential, the subband energies and their eigen envelope wave functions are calculated by solving a one-dimensional Schr?dinger equation. The calculations of optical parameters are used to optimize the Si/SiGe quantum cascade structures. Our results are found to be in good agreement with other calculations.

关键词： SiGe Alloy Electronic and Optical Properties Quantum Cascade Lasers (QCLs)

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Dual Trigger in <i>in Vitro</i>Fertilization: A Case-Control Study

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Open Journal of Obstetrics and Gynecology 2021年第8期11卷 1064-1072页

作者： Yassir ait Benkaddour Achraf Douazi Karam Harou Abderraouf Soummani IVF Unity Department of Obstetrics and Gynecology Mohammed VI University Hospital Center and Cady Ayyad University Marrakesh Morocco

Objective: To evaluate the benefit of dual trigger (hCG + GnRH agonist) in patients underwent controlled ovarian stimulation for IVF in an antagonist protocol. Methods: A retrospective case control study was performed (January 2017 to March 2019) in a single IVF center. The dual trigger group (n = 17), ovulation trigger was achieved with both hCG and GnRH agonist while in the single trigger group (n = 34), it was achieved by hCG alone. The first endpoint was the number of mature oocytes retrieved;the secondary endpoints were total number of oocytes retrieved, the number of cleaved embryos obtained (day 3) and blastocysts (day 5/day 6), the number of embryos transferred, the ongoing-pregnancy/miscarriage rate. Results: The dual vs. the single group showed the followings. The number of retrieved oocytes of 7.1 vs. 6.4 (p = 0.68);mature oocytes of 4.6 vs. 4.1 (p = 0.62), day-3-embryos of 2.9 vs. 2.0 (p = 0.2), day-5/6-embryos of 0.3 vs. 0.03 (p = 0.13), transferred embryos of 2.1 vs. 1.8 (p = 0.48);ongoing pregnancy of 1 vs. 9 (p = 0.14);miscarriage of 0 vs. 2 (p = 1). Conclusion: A dual trigger showed no additional clinical benefits. Future large studies are needed to demonstrate a real clinical advantage.

关键词： Chorionic Gonadotropin GnRH Agonist Dual Trigger In Vitro Fertilization

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Passive Smoking and Other Principal Risk Factors Associated with Low Birth Weight

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Open Journal of Obstetrics and Gynecology 2016年第7期6卷 390-395页

作者： Yassir ait Benkaddour Btissam Fatih Farah Majdi Abderraouf Soummani Department of Obstetrics and Gynecology Faculty of Medicine and Pharmacy University Hospital Mohammed VI Cadi Ayyad University Marrakesh Morocco

Background: Neonatal morbidity and mortality is one of the most public health problems in the world. A lot of neonatal deaths occur in foetus with low birth weight (LBW). Several risk factors of LBW have been described in the literature such as maternal age, chronic and gestational hypertension infection and anémia. Smoking is one of the most important preventable risk factor of LBW in developed and developing countries. Aims: In this study, we evaluated the incidence and the impact of passive smoking and some other principle risk factors of LBW. Material & Methods: This case control study was conducted in the department of obstetrics and gynecology of Marrakesh university hospital in Morocco. During a period of 3 years, all LBW babies were included in the study. Data analysis was performed by SPSS software. The association between LBW and each variable was studied by the chi square test comparing cases and controls groups. Logistic regression analysis was performed after including all variables found to have significant differences on univariate analysis. Results: 288 cases of LBW have been identified representing 2.19% of all births. The study of the categories showed that 84.3% of babies were moderate LBW (1500 - 2500 g), including 49 babies from twin pregnancies. 15.7% were very LBW (<1500 g). Several risk factors have been identified in LBW. Passive smoking was significantly associated with LBW [(OR 1.77;CI: 1.22 - 2.25)]. Conclusion: A number of risk factors are related to low birth weight, which is one of the main predictors of infant mortality. This study shows that passive smoking is one of those risk factors and it is a preventable one.

关键词： Low Birth Weight Passive Smoking Epidemiology Risk Factors

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Colorectal cancer fecal screening test completion after age 74,sources and outcomes in French program

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World Journal of Gastrointestinal Oncology 2019年第9期11卷 729-740页

作者： Akoi Koivogui Christian Balamou Raushan Rymzhanova Tu Letrung Hamou ait Hadad Zahida Brixi Stéphane Cornelis Hélène Delattre-Massy Thomas Aparicio Robert Benamouzig Comité Départemental des Cancers(CDC-93) CRCDC-IDFSite de Seine-Saint-DenisBondy 93146France Office De Lutte contre les Cancers(ODLC-01) CRCDC-AURASite de l’AinBourg-en-Bresse 01000France Association pour le Depistage des Cancers(ADECA-FC) CRCDC-Bourgogne-Franche-ComteSite de Franche-ComteBesancon 25000France Prévention and Santé en Val-d’Oise(PSVO) Immeuble du CentaureCRCDCIDFSite de Val-d’OiseCergy Saint Christophe 95800France Association pour le Dépistage des Maladies Cancéreuses(ADMC91) CRCDC-IDFSite de l’EsonneCMC De BlignyBriis-sous-Forges 91640France Association de dépistage organisédes cancers(ADOC94) CRCDC-IDFSite de Val-de-MarneJoinville-le-Pont 94340France Association Icaunaise de Dépistage du Cancer(AIDEC) CRCDC-Bourgogne-Franche-ComtéSite de l’Yonne Saint-Georges-sur-Baulche 89000France Association pour le Dépistage Organisédes cancers(ADOC92) CRCDC-IDFSite des Hauts-de-SeineNanterre 92000France Service d'Hepato Gastro Enterologie Hopital Avicenne(AP-HP)Bobigny 93000France

BACKGROUND Elderly patients aged at least 75 years old(Elderly_75),represent 45%of colorectal cancer(CRC)*** others,the French Colorectal Cancer Screening Program(CRCSP)does not include Elderly_*** date,there is little evidence to justify stopping screening at 74 years of *** To describe CRC fecal screening test completion after age 74,source(CRCSP/Provider ordered)and outcomes of these *** The study concerned 18704 Elderly_75 residing in eleven French districts(Ain,Doubs,Essonne,Haute-Saone,Hauts-de-Seine,Jura,Seine-Saint-Denis,Territoire-de-Belfort,Val-de-Marne,Val-d'Oise,Yonne),having performed a CRC screening test between January 2008 and December *** tests performed in a circumstance of delayed response to a solicitation(DRS)from the local cancer screening managing center(Managing-Center)were distinguished from the tests non-solicited by the Managing-Center,performed after a recommendation by a General Practitioner(GP)or other provider ordered(RGP).DRS was any test realized by an Elderly_75 following an initial invitation from the ManagingCenter with a maximum 24 mo after this *** Non-DRS test was considered *** outcomes of these tests were described according to the circumstances of test *** Of 18995 screening-tests were performed at ages:75(83.5%),76-80(13.4%)and>80(3.1%)years ***_75 performed the screening test in a circumstance of DRS(71.9%)or RGP(28.1%).The proportion of the tests that could not be analyzed and not restarted was 13.2%.For these unanalyzed tests,the reason was age-related in 78.0%of cases,related to the laboratory's refusal to analyze the test of people aged≥*** colonoscopy completion rate was 81.3%.For those575 people with reported colonoscopy,no complication was listed.18.0%of the366 Elderly_75 with lesions had no anteriority in the *** neoplasia(124 Low-risk-polyps,159 High-risk-polyps,13 Unspecified-polyps and 70 CRCs)detection rate was 19.3/1000 Elderly_7

关键词： Colorectal cancer Fecal screening test Participation rate Colonoscopy completion rate Elderly

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Study of the Population Dynamics of the Olive Fly, <i>Bactrocera oleae</i>Rossi. (Diptera, Tephritidae) in the Region of Essaouira

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Open Journal of Ecology 2015年第5期5卷 174-186页

作者： Abdellaziz ait Mansour Kholoud Kahime Mohammed Chemseddine Ali Boumezzough Laboratory of Ecology and Environment (URAC 32 CNRST ERACNERS 06) Faculty of Sciences Semlalia Cadi Ayyad University Marrakesh Morocco

The Bactrocera oleae Rossi fly is the most important olive pest. It is of major economic importance in the olive production area of Essaouira, where weather conditions are optimal for the conduct of the various stages of its life cycle. The lack of phytosanitary treatments worsens this situation. The development of the larval stages and different generations are related to the phenological stages of the olive and are controlled by changes in habitat conditions. Trapping of adult males by Deltas traps baited with sex pheromone, at the four study sites, has identified some characteristics of the evolution of the adult populations’ flight dynamics. Our main results show a decreasing gradient of early emergences of different stages from the coast to the continental areas as well as the absence of the summer generation at the inner station. Soil analysis in the two stations showed that the hypogenous pupae wintering in the soil survive until June. Knowledge of the factors involved in the bio-ecology of the olive fly and the phenology of the host allows the elaboration of monitoring/ warning calendars, and phytosanitary measures in order to establish an IPM program adapted to the requirements of olive orchards in the region.

关键词： Bactrocera oleae Dynamics Generation Coastline Morocco

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The Influence of Inflow Condition on the Generation of Tumbling Flow Using Detached Eddy Simulation

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Energy and Power Engineering 2012年第1期4卷 34-40页

作者： Mustapha Mahdaoui Abdelouahad ait msaad Mhmed Mouqallid Elhoussin Affad 不详

One of the objectives of car manufacturers is to improve engine performance, reduce consumption reduce emissions. To achieve this objective, it is important to understand the phenomena involved in the combustion chambers of engines. These phenomena are numerous and complex in nature such: the aerodynamics, fuel-air mixture, turbulence, combustion and the cycle to cycle instabilities that cause more problems. One of the factors responsible for the phenomenon of cycle to cycle variations is the instability of the characteristics of the vortex flow Tumble. This instability may be due to changes in initial conditions. This study is achieved in order to contribute in a better understanding of engine flow by using a Detached Eddy Simulation Shear-Stress Transport (DES SST) model, which is a hybrid RANS/LES model. These simulations have been performed with the commercial CFD (computational fluid dynamic) code (FLUENT) coupled with our own development based on UDF facilities given by FLUENT. To explore the suitability of the 3D DES STT to simulate the internal flow, the calculation is performed for a model tumbling flow at constant volume. This flow has been measured in an experimental set up and measurements are used to initiate and to validate simulations. For this case study, we consider simplified engine geometry. To generate tumbling motion, we use non-reacting DES with a single cycle (SC) strategy. Also, with this strategy we study the effect of initial conditions on the instabilities that accompany a vortex type tumble.

关键词： Aerodynamics Cycle to Cycle Variations Detached Eddy Simulation Tumble

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