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Smart Grid and Renewable Energy 2023年第5期14卷 73-84页

作者： Ibrahima Gueye Mamadou Sall abdoulaye Kebe Laboratoire L3EPI Ecole Superieure Polytechnique Université Cheikh Anta Diop Dakar Senegal

In this study, we investigate the performance of a boost converter regulating its output voltage using two control methods: Proportional-Integral (PI) control and neural control. Both methods are implemented on a simulation platform (Matlab/Simulink) and evaluated in terms of accuracy, response speed, and robustness to disturbances. Indeed, the output voltage of converters exhibits imperfections that require a control method to optimize efficiency when applying a variable load. Results show that neural control offers superior performance in terms of accuracy and response time, with faster and more precise regulation of the output voltage. On the other hand, PI control proves to be more robust against disturbances. These findings can help guide the selection of the appropriate control method for a boost converter based on the specific requirements of each application.

关键词： Chopper PI Control Neural Control

Petrographic and Geochemical Characters of Granites of the Banfora Belt, Burkina Faso (West Africa)

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International Journal of Geosciences 2024年第9期15卷 682-697页

作者： abdoulaye Ouedraogo Seta Naba Hermann Ilboudo Laboratoire Gosciences et Environnement (LaGE) Dpartement des Sciences de la Terre Unit de Formation et de Recherche en Sciences de la Vie et de la Terre Universit Joseph KI-ZERBO Ouagadougou Burkina Faso Bureau des Mines et de la Gologie du Burkina (BUMIGEB) Ouagadougou Burkina Faso

The Banfora’s birimian greenstones belt is located in the western part of Burkina Faso (west Africa). Recent petrographic and lithogeochemical studies have highlighted plutons intruding the metasedimentary and metavolcanic series. These plutonic rocks are composed of leucogranites belonging to the so-called Ferkessedougou’s or Ferké’s batholith, granites, granodiorites, monzodiorites and quartz monzonites. From the lithogeochemical studies, these plutonic rocks have a calc-alkaline and peraluminous character. The rare earth elements spectra of the Ferké’s leucogranites let distinguished two sub-facies. One of the sub-facies is composed of quartz monzonite to granite, while the other is granitic sensu stricto. However, all these plutonic rocks were emplaced in a geodynamic context of subduction followed by collision.

关键词： Burkina Faso Banfora Greenstones Belt Plutons Geodynamic Context Subduction

The Geodynamic Context of the Cenozoic Volcanism of the Cap-Vert Peninsula (Senegal)

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International Journal of Geosciences 2014年第12期5卷 1521-1539页

作者： abdoulaye Ndiaye Papa Malick Ngom Department of Geology Faculty of Sciences and Technology Cheikh Anta Diop University Dakar Senegal

The Cenozoic alkaline volcanism of the Senegalo-Mauritania sedimentary basin presents an episodic long-lasting volcanic activity from the Eocene-Oligocene boundary up to the Quaternary. Two volcanic episodes are usually distinguished on stratigraphical grounds: a Miocene one and a Quaternary one separated by a period of quiescence of several million years corresponding to the main phase of lateritic weathering. The Tertiary lavas are highly silica-undersaturated alkaline rocks ranging from nephelinites to basanites. They contain nepheline and fassaite-type clinopyroxene in their mineralogy. The Quaternary lavas are more evolved with Hy-normative in comparison to the Tertiary ones;they are composed of basanites and medium to coarser-grained dolerites. The distribution of the REE and other incompatible elements are typical of alkaline lavas with generally strong LREE enrichment without significant Eu anomaly. The Cenozoic Cap-Vert lavas have OIB (oceanic islands basalts)-affinities as shown by their relatively radiogenic Nd and unradiogenic Sr characters closed to the HIMU-OIB. This suggests a HIMU-type end member in the magma sources which is fairly comparable to those erupted in the Canaries and Cape Verde archipelagoes during the same period.

关键词： Cenozoic Alkaline Volcanism Oceanic Islands Basalts Cap-Vert Peninsula Senegalo-Mauritania Basin

Food Security in Developing Countries: Factors and Mitigation

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American Journal of Climate Change 2024年第3期13卷 391-405页

作者： Hellen Abbo Owasa abdoulaye Fofana Fall African Center of Excellence in Agroecology and Livelihood Systems Uganda Martyrs University Kampala Uganda Department of Plant Biology Cheikh Anta Diop University of Dakar (UCAD) Dakar Senegal National Laboratory for Research on Plant Production (LNRPV) Senegalese Agricultural Research Institute (ISRA) Dakar Senegal

Since 1976, eradicating hunger has become one of the priority objectives of the United Nations, which is included in the Charter of Human Rights;the right to get adequate food. The qualification of food security in time and space must analyze not only the three components it covers but also the relationships that these three components maintain. Climate change contributes to food insecurity, but it is not the only factor. To address food insecurity in various forms, greater food security must be combined with improved sustainable agricultural practices with minimal strain on the environment. This review of literature insists on the principles of food security, which in particular allows a better understanding of food insecurity in developing countries and favors a greater contribution of agriculture and food systems in general to nutritional progress.

关键词： Food Security Developing Countries Climate Change

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巴马客运公司（马里）商业模式构建研究

巴马客运公司（马里）商业模式构建研究

作者： abdoulaye BALDE 燕山大学

学位级别：硕士

即使按照地区标准,马里的交通基础设施也很差并限制了马里的经济增长和发展。在二十一世纪初,马里交通基础设施的改善被提到了议事日程。本研究的目的是在马里的城市公共交通行业中引进和采用一种新的运输模式。该研究采用了由Ho Huyen ... 详细信息

即使按照地区标准,马里的交通基础设施也很差并限制了马里的经济增长和发展。在二十一世纪初,马里交通基础设施的改善被提到了议事日程。本研究的目的是在马里的城市公共交通行业中引进和采用一种新的运输模式。该研究采用了由Ho Huyen Tran介绍的商业模式画布来构建新项目Bama Bus的商业模式。论文首先讨论了不同作者对公交运营服务的观点,该项目可能使用的商业模式,以及影响乘客出行方式的决定因素。其次,基于相关理论和管理工具,本文分析了引入Bama Bus的原因,马里公共交通业的现状,以及可能影响Bama Bus运营的外部环境因素。为了了解出行者对交通工具的使用习惯,本文采用了问卷调研的方法进行数据收集。调查问题有开放式和封闭式两种形式。研究的目标人群约为200人,采用描述性的方式对研究结果进行分析。为进一步了解引入Bama Bus的必要性、如何处理Bama Bus运营中的挑战以及该项目启动时可能需要合作的潜在商业伙伴等信息,本文对相关专业人士进行了访谈,这些专业人士包括了新创公司的高管和运输行业从业人员和管理人员。所有的问题都是开放式的,以避免限制受访人员对问题的深入探讨。最后,基于Ho Huyen Tran介绍的商业模式画布以及本文所做的调查和访谈,本文构建了Bama Bus的商业模式。Bama Bus商业模式的构建从四个方面展开,即价值主张、顾客界面、运营管理和财务管理。人力资源和财务部门的成功合作将帮助实现公司的主要目标。因此,这两个功能将在Bama Bus商业模式的运营成功中发挥重要保障作用。这项研究非常重要,它首先包含商业模式的构建,这是论文的重要组成部分,也将对Bama Bus项目的成功发挥重要作用。该研究也探讨了一个国家公共汽车服务如何使其居民及其经济发展获益。

关键词：公共汽车运营商业模式商业模式画布马里巴马客运

Ontogeny of Psychomotor and Sensory Functions in the Rat: Effects of Sexual Dimorphism

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Journal of Behavioral and Brain Science 2023年第11期13卷 206-225页

作者： abdoulaye Bâ Lociné Bamba Seydou Silué Université F&eacutelix Houphou&eumlt-Boigny UFR Biosciences Abidjan C&ocircte d’Ivoire

Background: We studied the development of eight (8) different psychomotor and sensory functions in male and female rats, from postnatal day 10 to 45, with the aim of determining whether the ontogenesis of these functions was subject to sexual dimorphism. Methods: Wistar rats bred according to standard conditions in our laboratories were put into reproduction. Ten days after whelping, male and female pups were identified and subjected to a battery of behavioral tests on postnatal days 10, 15, 20, 25, 30 and 45, to assess the development of the following psychomotor and sensory functions: Exploratory activity, locomotor activity, emotional defecation, hind paws lifting reflex latency, wire-grasping time, Latencies of execution of crawling along the wire and of leap onto the ground, nociception (tail flick) and body weight. Results: Only complex brain functions generated by cerebral cortex activities, i.e. exploratory activity and leap execution latency, do not undergo differential development sex-dependent. However, voluntary motor functions initiated in the motor cortex, and requiring high peripheral muscle performance such as crawling execution latency and wire-grasping time developed more rapidly in males than in females. Correlatively, body weight i.e. muscle mass index increased more speedily in males than in females. On the other hand, studies of automatic motor functions such as locomotor activity, and reflex motor functions i.e. hind paws lifting reflex latency and tail flick latency showed earlier development in females than in males. In addition, the study of emotional response, an emanation of limbic structures, showed prodigious development in females compared to males. Conclusion: Our studies have shown that there is a developmental sexual dimorphism of the central nervous system in the rat. Indeed, studies of automatic and reflex motor functions, whose activities are essentially linked to the spinal cord and brainstem, indicated that hindbrain areas deve

关键词： Developing Rats Brain Ontogeny Psychomotor Functions Sexual Dimorphism

A Review on Conductive and Transparent Materials Used in the Design of Transparent Antennas

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Open Journal of Antennas and Propagation 2023年第2期11卷 11-25页

作者： abdoulaye Sissoko Cheick Oumar Sanogo Badié Diourté Université des Sciences des Techniques et des Technologies de Bamako Bamako Mali

In this review, we highlight the essential parameters of some transparent materials for use in the design of transparent antennas. ITO films with a sheet resistance of Rs = 10 Ω/sq and a T = 90% transmittance, we turn to materials that can be serious alternatives for ITO, such as graphene T = 97% for Rs = 60 Ω/sq and the micro-mesh metal. Wire mesh seems to be the best alternative T = 93% for Rs Rs = 0.022 Ω/sq at T = 81%, this is the micrometric pitch mesh.

关键词： Transmittance Resistance by Square Grid Micrometric Mesh

Boundary Exact Controllability of the Heat Equation in 1D by Strategic Actuators and a Linear Surjective Compact Operator

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Applied Mathematics 2020年第10期11卷 991-999页

作者： Cheikh Seck Libasse Ane abdoulaye Sène Département de Mathématiques de la FASTEF ex ENS de l’Université Cheikh Anta Diop de Dakar Sénégal Laboratoire d’Analyse Numérique et d’Informatique (LANI) de l’UFR SAT de l’Université Gaston Berger de Saint-Louis Sénégal Département de mathématiques et d’Informatique de la Faculté des Sciences et Techniques de l’Université Cheikh Anta Diop de Dakar Sénégal

In this paper we show a boundary result of controllability by a new approach using a linear, continuous and surjective operator built from the solution of the heat system. And, subsequently, the border exact controllability of the 1D heat equation through a compactness criterion and the use of strategic zone actuators were established.

关键词： Control Controllability Estimations Strategic Actuator

Hydro Mechanical Properties of Cement and Cellulose Stabilized Compressed Clay Bricks

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材料科学与工程（中英文A版） 2014年第11期4卷 348-355页

作者： Emmanuel Ouedraogo abdoulaye Ouedraogo Adamah Messan Laboratoire des Energies Thermique et Renouvelable universitk de Ouagadougou Burkina Faso 03 B.P. 7021 OuagadougouBurkina Faso Laboratoire Eco-Materiaux de Construction 2iE 01 BP 594 Ouagadougou 01 Burkina Faso

An experimental investigation is carried out in order to characterize the properties of new construction materials. Clay blocks stabilized with cement and recycled papers are successively tested. When these composite materials are utilized as finish for house envelops, they must have appropriate mechanical strength and water stability. Mechanical properties such as compression and tensile tresses of clay-cement and clay-cement-paper mixtures are found to be quite similar but are two to three times greater respectively for clay-paper and purely clay blocks. The former mixtures are also very stable regarding water. The above results give the optimum conditions for the utilization of these new construction materials.

关键词：电机械性能水稳定性粘土砖泥水压缩纤维素粘土水泥建筑材料

中国与喀麦隆之间的经济合作分析——以基础设施建设和投资项目为中心

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中国与喀麦隆之间的经济合作分析——以基础设施建设和投资项目为...

作者： HASSOUMI abdoulaye 吉林大学

学位级别：硕士

本研究旨在增进对中国与喀麦隆之间经济合作的理解。中国公司深度参与了喀麦隆国内的基础设施建设和投资。他们在在建项目中享有最大份额。本研究重点关注中国对喀麦隆投资对喀麦隆国内社会经济发展产生何种影响。第一章包括简介、中喀... 详细信息

本研究旨在增进对中国与喀麦隆之间经济合作的理解。中国公司深度参与了喀麦隆国内的基础设施建设和投资。他们在在建项目中享有最大份额。本研究重点关注中国对喀麦隆投资对喀麦隆国内社会经济发展产生何种影响。第一章包括简介、中喀关系背景、本研究的意义、研究问题和研究假设。双方签署经济商务合作协定后(2002),经济合作显著加强。中国是喀麦隆第一个商业合作伙伴,喀麦隆也从中国的财政支持中获得了巨大利益。双方的合作重点是基础设施建设和投资,因为喀麦隆在基础设施建设方面有巨大需求,喀麦隆也拥有大量自然资源。因此,中国可以为喀麦隆的基础设施建设和自然资源开发提供资金和技术支持。第二章是理论框架,这是本研究的科学基础。本研究运用新自由主义理论、现代化理论等经济发展理论,分析了中国投资和基础设施建设项目的相关数据。根据理论,基础设施建设为经济和社会提供了丰厚的回报。因此,为了提高经济竞争力和降低机会成本,基础设施领域可持续投资非常有必要。第三章重点关注中国在喀麦隆的基础设施建设和投资项目,展示了中国对喀麦隆社会经济的介入情况。投资项目主要集中在石油、采矿、农业、林业、供水等能源部门。基础设施项目包括高速公路、水电大坝、体育场馆和医院建设。本研究对中国在喀麦隆的主要投资进行了考察,就喀麦隆人对中国基础设施项目的看法进行了调查。调查显示,中国最重要的投资位于农林业、采矿和石油勘探领域。自2000年以来,中国公司的伐木租借地(logging concession)是全国规模最大的,占地面积达全部的10-12%(57万公顷),其次是法国和意大利的公司。自2006年以来,中国的农业投资包括将10公顷的土地用于种植稻米,玉米,木薯和其他重要作物。此外,中国石化在2008年购买了新加坡橡胶公司GMG Global 90%的股份,成为喀麦隆第一家橡胶开采公司。调查结果显示,中国企业参与建设的基础设施项目实施情况良好。这些公司涉足了约70%的喀麦隆官方规划项目。中国企业承建的Kribi工业港综合体和Lom Pangar水力发电大坝是中国公司进军喀麦隆的两个典范。前者是在中国的技术和经济援助下建造的,后者是在世界银行、非洲开发银行和欧洲投资银行的经济支持下建造的,中国公司CWEC中标承建。在喀麦隆“2035年愿景”中,这两个项目都被列为喀麦隆经济发展的支柱之一。喀麦隆可以依靠中国的投资来实现其长期发展目标。第四章分析了这些投资和基础设施项目对喀麦隆社会经济状况的影响,以及这些项目如何帮助政府实现“2035年愿景”和改善人民的生活条件。中国在喀麦隆的投资和基础设施项目对喀麦隆社会经济状况产生了积极影响。与喀麦隆的传统合作伙伴,如欧洲大国相比,中国对喀麦隆经济发展的贡献是实实在在的,反映在了具体项目上。得益于中国对喀麦隆的技术和经济援助,这些项目正在促进喀麦隆就业、技术进步和改善人民生活条件。自2007年以来,中国对喀麦隆的外商直接投资估计约为43.5亿美元,主要用于投资和基础设施项目。但是,中国的投资也还存在一些问题,影响了项目效率的提高和中喀关系的可持续发展。这些问题包括与当地社区互动、承担环境和社会责任不足、恶劣的工作条件、本地员工融合程度低和不透明等治理问题。对于第一个问题,约36.8%的受访者认为,与当地社区沟通和互动困难是中国企业在喀麦隆遇到的主要问题。由于与当地社区的互动非常有限,中国工人对当地的文化和习俗不太熟悉。这种情况可能会导致误解发生。对于第二个问题,世界自然基金会在2014年发布的报告指出,中国企业需要全面遵守各种环境保护规则。最后,中国公司和喀麦隆政府应该合作打击腐败和解决项目资金管理不善问题。提供相关中国资金和项目执行情况的官方数据,使之更加透明化。第五章包括对喀麦隆与中国经济合作的一些建议和结论。中国企业应通过结构性和综合性对话来加强与当地社区的沟通,也要积极承担社会责任和环境责任以提高形象,使喀麦隆与中国的合作更加可持续。此外,还需要增加技术转让和与当地企业家的接触。最后,喀麦隆要加强经济治理,提高透明度,这样中喀双方的合作才能取得有效成功,实现预定目标。希望这项研究将有助于实际行动者和官员更好地了解中喀合作,为解决双方合作中的问题提供帮助。

关键词：中国喀麦隆经济合作基础设施建设投资