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Impa.t of Clima.ic Pa.a.eters on the Performa.ce of Sola. Photovolta.c (PV) Module in Nia.ey

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Sma.t Grid a.d Renewa.le Energy 2017年第12期8卷 379-393页

作者： abdou La.if Bonka.ey Sa.dou Ma.ougou Ra.a.i a.a.ou Ma.ter Resea.ch Progra. Clima.e Cha.ge a.d Energy UAM Niamey Niger Ecole Norma.e Superieure UAM Niamey Niger Depa.tments of Chemistry UAM Niamey Niger

The sensitivity of mono-crysta.line sola. PV module towa.ds dust a.cumula.ion, a.bient tempera.ure, rela.ive humidity, a.d cloud cover is investiga.ed from Ma. to a.gust 2015 for Nia.ey’s environment. Two sola. modules with the sa.e cha.a.teristics ha.e been used to ca.ry out the impa.ts of the dust on the sola. PV module. One of the modules is being clea.ed every morning a.d the second one wa. used for monitoring the effect of dust a.cumula.ion onto the surfa.e of the unclea. module for Ma. a.d June. The a.bient tempera.ure a.ound the sola. PV module wa. recorded a. the sa.e time with the output volta.e a.d the output current to a.sess the impa.ts of a.bient tempera.ure on the PV conversion efficiency. In a.dition to these field test mea.urements, the sola. ra.ia.ion da.a.mea.ured in Na.iona. Center of Sola. Energy (CNES) of Nia.ey were a.so used. a.so the rela.ive humidity for the study a.ea.da.a.obta.ned Na.a.power a.ro-clima.ology website wa. used. Results show tha. the dust a.cumula.ion ha. the grea.est impa.t on the performa.ce of the PV module followed by tempera.ure, rela.ive humidity a.d cloud cover. Exposing the module in 23 da.s ha. reduced the energy output by 15.29%. The power output a.d the conversion efficiency of the PV module ha.e dropped by 2.6% a.d 0.49% respectively. The rela.ive humidity a.so ha. reduced the energy output by 4.3 Wh/m2/da..

关键词： Mono-Crysta.line Sola. PV Dust a.cumula.ion a.bient Tempera.ure Conversion Efficiency Da.ly Energy Output

High-dimensiona. supervised cla.sifica.ion in a.context of non-independence of observa.ions to identify the determining SNPs in a.phenotype

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Infectious Disea.e Modelling 2023年第4期8卷 1079-1087页

作者： a.ouba.ry Ga.e abdou Ka.Diongue Lionel Na.guep Komen a.a.ou Dia.lo Seydou Nourou Sylla.Ma.ya. Dia.ra.Cheikh Ta.la.Cheikh Loucouba. La.ora.ory for Studies a.d Resea.ch in Sta.istics a.d Development Gaston Berger University of Saint LouisSenegal Epidemiology Clinical Research and Data Science UnitInstitute Pasteur de Dakar220DakarSenegal a.rica. Institute for Ma.hema.ica. Sciences(a.MS) Senegal Informa.ion a.d Communica.ion Technologies for Development Alioune Diop University of BambeySenegal

This work a.dresses the problem of supervised cla.sifica.ion for highly correla.ed highdimensiona. da.a.describing non-independent observa.ions to identify SNPs rela.ed to a.*** use a.genera. pena.ized linea. mixed model with a.single ra.dom effect tha. performs simulta.eous SNP selection a.d popula.ion structure a.justment in highdimensiona. prediction ***,the model simulta.eously selects va.ia.les a.d estima.es their effects,ta.ing into a.count correla.ions between *** nucleotide polymorphisms(SNPs)a.e a.type of genetic va.ia.ion a.d ea.h SNP represents a.difference in a.single DNa.building block,na.ely a.*** resea.ch ha. shown tha. SNPs ca. be used to identify the correct source popula.ion of a. individua. a.d ca. a.t in isola.ion or simulta.eously to impa.t a.*** this rega.d,the study of the contribution of genetics in infectious disea.e phenotypes is of grea. *** this study,we used uncorrela.ed va.ia.les from the construction of blocks of correla.ed va.ia.les done in a.previous work to describe the most rela.ed observa.ions of the *** model wa. tra.ned with 90%of the observa.ions a.d tested with the rema.ning 10%.The best model obta.ned with the genera.ized informa.ion criterion(GIC)identified the SNP na.ed rs2493311 loca.ed on the first chromosome of the gene ca.led PRDM16((PR/SET doma.n 16))a. the most decisive fa.tor in ma.a.ia.a.ta.ks.

关键词： Non independence of observa.ions Correla.ed va.ia.les High-dimensiona. supervised cla.sifica.ion SNP Phenotype

Geochemistry of Sa.dstone Type Ura.ium Deposit in Ta.a. Forma.ion from Tim-Mersoi Ba.in in Northern Niger (West a.rica.: Implica.ion on Provena.ce, Pa.eo-Redox a.d Tectonic Setting

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Journa. of Geoscience a.d Environment Protection 2018年第8期6卷 185-225页

作者： abdou Dodo Boha.i Moussa.Ha.ouna.a.i Mosa.d Depa.tment of Geology Abdou Moumouni University Niamey Niger Depa.tment of Mining a.d Meta.lurgica. Engineering Assuit University Assuit Egypt

The study a.med a. investiga.ing the geochemistry of a.sa.dstone-type ura.ium deposit in Ta.a. forma.ion for provena.ce, pa.eo-redox, tectonic setting in order to propose a.geologica. model of ura.ium. X-Ra. Fluorescence (XRF) a.d Induced Coupled Pla.ma.Ma.s Spectrometry (ICP-MS) a.a.yses were used to determine the sa.dstone composition. Ma.or, tra.e a.d ra.e ea.th element compositions of the sa.dstones ha.e been investiga.ed to determine their provena.ce, tectonic setting a.d the influence of wea.hering conditions. Field studies of Ta.a. forma.ion revea.ed tha. a.ma.or a.cident N30° tha. ca. be interpreted a. a. extension of the a.striche a.cident ensures the controls of Ta.a. sedimenta.ion a.d minera.iza.ion deposits a.d the presence oxidized zone a.d reduced zone indica.e the direction of circula.ion of the minera.ized fluids from West to Ea.t. The ura.ium minera.iza.ion is dissemina.ed a. pitchblende tha. gives a.yellow color to the sa.dstone while, molybdenum minera.iza.ion gives a.blue color to the sa.dstone. Results of the Geochemica. a.a.ysis indica.e tha. the sa.dstone-type ura.ium deposit of Ta.a.is cla.sified into Protoqua.zite (i.e. lithea.enite a.d sublitha.enite), a.kose, suba.kose, wa.ke a.d qua.tz a.enite a.d va.ied in their ma.urity. Their Ra.e Ea.th Elements (REE) pa.tern displa.s high light REE over hea.y REE, fla. HREE a.d a.significa.t nega.ive Eu a.d Ce a.oma.ies a.d in genera. correla.ed well with the Na.C a.d Pa.S a.era.e composition. The source a.ea.ma. ha.e conta.ned qua.tzose sedimenta.y rocks. The geochemica. da.a.support deposition in reducing environment of a.id to humid clima.ic conditions rich in orga.ic ma.ter a.fected by pa.sive ma.gin (PM) tectonic setting a.d the sediments a.e derived from felsic a.d ma.ic source rocks. Tra.e a.d REE da.a.a. well a. the high va.ues of the wea.hering indices: Chemica. Index of a.tera.ion (CIa., Pla.iocla.e Index of a.tera.ion (PIa. a.d Chemica. Index of Wea.hering (CIW) suggest intermedia.e to extr

关键词： Ura.ium Genesis Geochemistry Ta.a. Forma.ion Tim-Mersoi Ba.in

Phosphorus Ba.ed Cera.ics for Positive Electrode Synthesis a.d Cha.a.teriza.ion

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Journa. of Modern Physics 2014年第15期5卷 1459-1466页

作者： Diouma.Kobor abdou Ka.ri Dia.lo Modou Tine La.ora.oire de Chimie et de Physique des Ma.éria.x (LCPM) Département de Physique University Assane Seck of Ziguinchor Ziguinchor Senegal

Historica.ly, the LiCoO2 is the most used a. a.tive ma.eria. for ba.tery positive electrode beca.se of its grea. potentia. (3.7 - 4.2 V), its interesting specific ca.a.ity (150 ma.h·g-1) a.d its excellent life cycle [1] 08D0C9Ea.9F9Ba.E118C8200a.004Ba.0B02000000080000000E0000005F005200650066003300390038003500370036003700340032000000 . However, its toxicity, the coba.t cost a.d its structura. insta.ility oriented resea.ch towa.ds new ma.eria.s more sta.le tha. ca. repla.e it. In a.other context, hybrid, electrica. vehicles a.d communica.ion (computers a.d mobile phones...) ha.e increa.ed the scientific a.d technologica. resea.ch for new ma.eria.s ca.a.le of storing a.d return energy through a.system ca.led a.cumula.or. a.d resea.ch ha. identified the phospha.e olivine structure a. the most prolific cera.ic ma.eria. for positive electrode. LiFePO4 is a.promising ca.hode ma.eria. for Lithium-ion ba.teries. It provides high therma. sta.ility a.d is synthesized using low cost ma.eria.s. Unfortuna.ely LiFePO4 suffers from a.low electrica. conductivity, which is ha.mful to its electrochemica. performa.ce. Decrea.ing the pa.ticle size, coa.ing the pa.ticles with ca.bon or doping with meta. a.oms ca. increa.e the conductivity of the ma.eria.. In this pa.er, we present the synthesis, physico-chemica. a.d electrica. cha.a.teriza.ion of lithium a.d iron doped a.-phosphorrus-ba.ed cera.ic. The NPK Fertiliser wa. used a. a. a.d phosphorus precursors. The powder XRD spectrum shows a.possible presence of LiFePO4 a.d Fe2(PO)3 in theheterostrcture. a. importa.t qua.tity of a. is found by EDX spectra.which supposed tha. the most importa.t ba.ed a.om is a.uminum a.d not Phosphorus. This ca. expla.n the increa.e of the conductivity va.ue 102 times more importa.t tha. those found in the litera.ure for LiFePO4.

关键词： Cha.a.teriza.ion X-Ra. Diffra.tion EDX Cera.ic Positive Electrode

Infectious Complica.ions in Lupus Nephritis a.d a.socia.ed Fa.tors: a.Multicenter Study

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Open Journa. of Nephrology 2021年第4期11卷 506-515页

作者： Ma.sour Mbengue Myria. Mezoua.i Seyna.ou Dia.ne abdou Nia.g Da.a. Ja.m Hospita. Dakar Senegal Pikine Hospita. Dakar Senegal

Introduction: The preva.ence of infections in pa.ients with systemic lupus erythema.osus ra.ges from 26% to 78%. Pa.ients with systemic lupus erythema.osus a.e pa.ticula.ly susceptible to infections due to a.dysfunction of immune response a.d the immunosuppressive thera.y. Pa.ients a.d method: We ca.ried out this study with the a.m of describing the preva.ence of infections in lupus nephritis a.d determining the a.socia.ed risk fa.tors. This wa. a.multi-center, observa.iona., retrospective, descriptive a.d a.a.ytica. study over a.10-yea. period from November 1, 2010 to October 31, 2020. The study wa. ca.ried out in the nephrology depa.tments of six hospita.s in Da.a.. Results: During the study period, 98 pa.ients were included. The mea. a.e wa. 32.32 ± 11.33 yea.s with a.sex ra.io of 0.21. a.ong the included pa.ients, fifty-four (55.1%) ha. a. lea.t one infectious episode, of which 53.7% ha. 1 infection, 24.1% ha. 2 infectious episodes a.d 22.2% ha. 3 infectious episodes. The overa.l incidence wa. 55.1 infections per 100 pa.ient-yea.s. 57.2% of these infectious episodes occurred within the first six months a.ter the lupus wa. dia.nosed. The ma.n sites of infection were urina.y (30.7%), ga.trointestina. (22.0%) a.d pleuropulmona.y (16.5%). The incrimina.ed germ wa. a.ba.terium in 78.18% of ca.es, a.virus in 5.46%, a.pa.a.ite in 9.09 a.d a.fungus in 7.27. The most frequently germ found wa. Escherichia.coli (29.09%). The evolution wa. ma.ked by recovery in 93.4% of ca.es. Dea.hs occurred in 15 pa.ients of which 33.3% were rela.ed to infections. Fa.tor significa.tly a.socia.ed with the onset of infection in multiva.ia.e a.a.ysis wa. the presence of a.prolifera.ive cla.s of lupus nephritis (p = 0.013). Conclusion: Infections were common during lupus nephritis. The presence of a.prolifera.ive cla.s wa. risk fa.tors for infection.

关键词： Lupus Nephritis Infection Prolifera.ive Cla.s

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振动复合泡沫驱油机理实验研究

振动复合泡沫驱油机理实验研究

作者： Ya.OUZa.abdou Ma.OMI 中国石油大学(华东)

学位级别：硕士

水驱开发后油藏的剩余油饱和度较高,为提高原油采收率各种采油技术应运而生。其中泡沫驱技术由于成本低、环保的原因,应用广泛,而泡沫性能和作用效果是泡沫驱技术的重点问题。论文研究了低频振动对提高泡沫性能的作用机理,并分析了低频... 详细信息

水驱开发后油藏的剩余油饱和度较高,为提高原油采收率各种采油技术应运而生。其中泡沫驱技术由于成本低、环保的原因,应用广泛,而泡沫性能和作用效果是泡沫驱技术的重点问题。论文研究了低频振动对提高泡沫性能的作用机理,并分析了低频振动对泡沫驱提高原油采收率的影响。首先通过岩心驱替实验,分析了低频振动对地层中水驱渗流规律、储层岩石性质和原油粘度的影响。实验所用泡沫体系由分子量为500万和1000万的部分水解聚丙烯酰胺(HPa.)和表面活性剂BK-6组成。在泡沫溶液样品制备中,使用浓度为0.5%的表面活性剂和0.15%的聚合物(HPa.),和模拟的地层水(含Na.Cl:70%,Ca.Cl:12%,Mg Cl?6HO:18%)。研究了低频振动影响泡沫性能的作用机理,主要包括:振动对静态泡沫体系性能的影响以及振动对动态泡沫体系堵塞性能的影响。通过泡沫综合值和半衰期测试,进行静态泡沫体系的发泡性能和稳定性评价;通过最大阻力系数和最大阻力系数有效期测试,进行动态泡沫封堵性能和稳定性评价。开展低频振动条件下的泡沫驱实验,将0.15PV的泡沫液和0.45PV的氮气,分三轮次注入填砂管模型中,每次注入0.05PV的泡沫液和0.15PV的氮气,对泡沫驱的EOR效率进行了评价。当泡沫在多孔介质中被破坏时,泡沫驱过程即变为表面活性剂驱过程。因此,开展了低频振动条件下的表面活性剂驱油实验,分析了低频振动对表活剂驱洗油效率和表面活性剂的乳化性能、动态吸附、扩散性能,以及提高原油采收率的效果影响。实验结果表明,低频振动能够改善储层岩石渗透率、油水相对渗透率、储层岩石润湿性,并降低毛管压力和原油粘度,故可提高原油水驱采收率;静态泡沫体系的发泡性能和稳定性在最佳振动频率和加速度下得到优化,振动时间对动态泡沫封堵的最大阻力系数没有影响,但是振动时间越长,泡沫的稳定性就越好,振动的频率和加速度对最大阻力系数和最大阻力系数的有效期有影响,但其适用参数需在油田应用实践中具体优化;低频振动条件下,泡沫调驱和表面活性剂驱提高采收率的效果均得到提高。

关键词：水驱低频振动泡沫性能表面活性剂驱原油采收率

Ga.lbla.der Ca.cinoma.of the Thyroid Revea.ed by a. a.ute Festered Thyroiditis: a.Litera.ure Study a.out a.Ca.e

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Interna.iona. Journa. of Otola.yngology a.d Hea. & Neck Surgery 2023年第3期12卷 135-139页

作者： a.iou Fa.y Ha.y Ta.l abdou Sy Fulgence abdou Fa.e Bira.e Loum Kevin Dimitri Ma.foumbi Ma.foumbi ENT Depa.tment Diourbel Heinrich Lübke Regional Hospital Centre Diourbel Senegal ENT Depa.tment Saint-Louis Regional Hospital Centre Saint-Louis Senegal ENT Depa.tment Children’s Hospital of Diamniadio Dakar Senegal Depa.tment of Medecine Bambey Alioune Diop University’s Diourbel Senegal ENT Depa.tment H&#244pital Principal de Dakar Dakar Sénégal

The cuta.eous extension of ga.lbla.der thyroid ca.cinoma.is uncommon a.d is a.ong the a.gressive forms of the disea.e. We a.e reporting the ca.e of a.woma. of 54 tha. shows a.ute festered thyroiditis worsened by a.necrotic ulcer wound on the skin la.ting 3 weeks a.id a.big neglected hetero-multinodula. goitre, evolving since 20 yea.s. The a.a.omopa.hologica. test showed a.ga.lbla.der thyroid ca.cinoma.of the thyroid with severe infla.ma.ion. The trea.ment consisted of a.complete thyroidectomy with recurrent bila.era. dredging. There wa. a.fa.oura.le evolution. Ga.lbla.der ca.cinoma. in its a.gressive a.pect, ma. be linked to the occurrence of a.ute festered thyroiditis. Therefore, the prognosis of our pa.ient wa. fa.oura.le.

关键词： Thyroiditis Ga.lbla.der Ca.cinoma Suppura.ion

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科摩罗ONICOR公司员工招聘与选拔研究

科摩罗ONICOR公司员工招聘与选拔研究

作者： Za.ibou abdou Moissi 燕山大学

学位级别：硕士

本研究试图分析和评估科摩罗ONICOR公司的人员招聘和选拔。该研究采用问卷调查的方法进行定量研究。调查问卷数据来自100名受访者和10名代表招聘人员的受访者。使用简单的随机抽样技术以保证从目标人群中选择样本。使用Excel进行数据处... 详细信息

本研究试图分析和评估科摩罗ONICOR公司的人员招聘和选拔。该研究采用问卷调查的方法进行定量研究。调查问卷数据来自100名受访者和10名代表招聘人员的受访者。使用简单的随机抽样技术以保证从目标人群中选择样本。使用Excel进行数据处理。本研究的主要目的是解决该公司招聘和选拔过程中遇到的问题并提出相应解决方案。本研究主要目标是确定ONICOR公司招聘过程的问题对员工流动离职的影响,并确定招聘和选拔过程对ONICOR公司组织生产力的影响。论文介绍了ONICOR公司招聘管理的现状,基于问卷调查数据分析了该公司在招聘管理中存在的问题,在此基础上提出了解决对策。总的来说,结果表明ONICOR公司的人力资源管理体系需要进一步完善,科摩罗人力资源管理实践的系统、结构和计划仍在不断发展,期望从整个实践中受益。为了正确进行这项研究,重点关注两到三个具体目标,包括完成ONICOR员工的绩效水平、确定其绩效的解释因素以及根据ONICOR的绩效确定招聘和选拔过程的影响。最后,希望通过这项研究为ONICOR公司的招聘和选拔工作提出有益的借鉴,并为科摩罗同类企业的招聘和选拔工作提供有益的借鉴。

关键词：雇员招聘雇员选拨奥尼科尔公司科摩罗

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影响Ca.国际银行员工绩效的激励因素研究

影响CAC国际银行员工绩效的激励因素研究

作者： a.SILa.a.Da.La. abdou 华北电力大学(北京)

学位级别：硕士

员工的工作积极性对提升员工绩效以及公司生产率至关重要。缺乏工作积极性的员工会对公司带来损失。因此,研究影响员工工作绩效的激励因素将有助于帮助管理者及时发现业绩低效的原因,从而避免不必要的损失。对本文分析了激励员工的各种... 详细信息

员工的工作积极性对提升员工绩效以及公司生产率至关重要。缺乏工作积极性的员工会对公司带来损失。因此,研究影响员工工作绩效的激励因素将有助于帮助管理者及时发现业绩低效的原因,从而避免不必要的损失。对本文分析了激励员工的各种因素,以及这些因素对他们的工作绩效产生的影响。为了回答（1）激励员工的因素是什么?（2）工作积极的员工是否更有效率?（3）缺乏工作积极性的员工是否会阻碍组织的成长?（4）为什么公司应该在员工满意度上投入更多?等四个问题。本文以吉布提Ca. Interna.iona. Ba.k的员工为研究对象,采用问卷调查法和面对面访谈法。通过对调研结果的整理和分析发现三个因素对员工的绩效影响最大。促使员工更加努力工作的动机因素是奖金,工作晋升和贷款便利。这三个因素会使员工变得更加高效,因为他们为了获得奖金、工作晋升机会和贷款便利而更加努力地工作。本文同时发现银行应区别使用不同激励因素,以促使其员工表现更好。研究表明,银行要特别注意激励因素在实际应用中的效果,因为有一少部分雇员认为这些激励因素与工作绩效无关。此时银行实施这些激励因素就可以视为公司的运作成本,因为实施这些激励因素并没有提升绩效水平。银行应认识到劳动力动机对其员工创造力的影响,减少对这些因素的忽视的做法,减轻员工对可能获取的福利或实际收入的担忧。银行的人力资源部门应该建立评估体系评估对激励因素对员工产生的影响进行全面评价,因为根据激励因素制定的相关策略会对参与员工的福祉和组织的成就产生影响。

关键词：员工的动力工作绩效奖金工作晋升