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Advanced hybrid plasmonic nano-emitters using smart photopolymer

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Photonics Research 2022年第7期10卷 1552-1566页

作者： DANDAN GE alI issa SAFI JRADI CHRISTOPHE COUTEAU SYLVIE MARGUET RENAUD BACHELOT Light NanomaterialsNanotechnologies(L2n)LaboratoryCNRS EMR 7004Universitéde Technologie de Troyes12 rue Marie Curie10004Troyes CedexFrance UniversitéParis Saclay CEACNRSNIMBEF-91191Gif sur YvetteFrance

The integration of nano-emitters into plasmonic devices with spatial control and nanometer precision has become a great *** this paper,we report on the use of a smart polymer to selectively immobilize nano-emitters on specific preselected sites of gold nanocubes(GNCs).The cunning use of the polymer is ***,it records both the selected site and the future emitters-GNC distance through plasmon-assisted ***,because the polymer is chemically functionalized,it makes it possible to attach the nano-emitters right at the preselected polymerized sites,which subsequently recognize the nano-emitters to be *** the resulting active medium is a spatial memory of specific plasmonic modes,it is anisotropic,making the hybrid nanosources sensitive to light *** ability to adjust their statistical average lifetime by controlling the thickness of the nanopolymer is demonstrated on two kinds of nano-emitters coupled to GNCs:doped polystyrene nanospheres and semiconductor colloidal quantum dots.

关键词： polymer plasmon attached

Modeling of an Automatic Optimization System of Cyanide Concentration in Carbon in Leach for Optimal Ore Processing in a Mining Company

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Energy and Power Engineering 2023年第11期15卷 443-456页

作者： Madjoyogo Herve Sirima Betaboale Naon issa Compaore Institute of Industrial and Textile Systems Engineering Polytechnic High School of Ouagadougou Ouagadougou Burkina Faso Group of Studies and Research in Mechanics Energy and Industrial Techniques University Institute of Technology Nazi Boni University Bobo-Dioulasso Burkina Faso Cooperative Mining Gaoua Burkina Faso

The optimization system, which was the subject of our study, is an autonomous chain for the automatic management of cyanide consumption. It is in the phase of industrial automation which made it possible to use the machines in order to reduce the workload of the worker while keeping a high productivity and a quality in great demand. Furthermore, the use of cyanide in leaching tanks is a necessity in the gold recovery process. This consumption of cyanide must be optimal in these tanks in order to have a good recovery while controlling the concentration of cyanide. Cyanide is one of the most expensive products for mining companies. On a completely different note, we see huge variations during the addition of cyanide. Following a recommendation from the metallurgical and operations teams, the control team carried out an analysis of the problem while proposing a solution to reduce the variability around plus or minus 10% of the addition setpoint through automation. It should be noted that this automatic optimization by monitoring the concentration of cyanide, made use of industrial automation which is a technique which ensures the operation of the ore processing chain without human intervention. In other words, it made it possible to substitute a machine for man. So, this leads us to conduct a study on concentration levels in the real world. The results show that the analysis of the modeling of the cyanide consumption optimization system is an appropriate solution to eradicate failures in the mineral processing chain. The trend curves demonstrate this resolution perfectly.

关键词： Modeling Automatic Optimization Cyanide Concentration Optimal Ore Processing

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冲突与调解：基于马里北部地区的案例研究

冲突与调解：基于马里北部地区的案例研究

作者： MamoudouDjibo issa 浙江大学

学位级别：硕士

Mali a country in West Africa was among the few countries to attained independence from France in *** post-independence era,the group of countries making up West Africa experiences various *** was once regarded a peaceful place in West Africa has endured what was initially thought to be a tribal insurrection against the central government for share of development *** this conflict in Northern Mali has taken an unprecedented proportion taken a heavy blow on the central government as well as the International *** most interesting part of this conflict is that various mediation effort since 2002 to date has not yielded the needed peace in the under developed Northern part of the *** the heart of the unresolved conflict are religion,territorial claim,and *** personal believe is that all conflict can be resolved if the parties involved adhere to the peace agreement and process and that where ever there’s conflict,mediation effort should be allowed to work to normalized the situation but this has not been the *** aim of this research is to highlights conflict and mediation in West Africa using the Northern Mali as a case *** study will also look into the root cause of conflicts in Northern Mali,and highlight some of the reasons for the failure of mediation efforts in Northern *** research will also try to establish the roles from both domestic and international players in a bid to find lasting solution to this conflict.

关键词：政治冲突国际调解马里北部地区

AGS能区粒子产生和椭圆流的RQMD模型模拟分析

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AGS能区粒子产生和椭圆流的RQMD模型模拟分析

作者： issa Kamara（易沙）哈尔滨工业大学

学位级别：硕士

高能重离子碰撞为产生和研究在极高温度和能量密度条件下的热密核物质的性质提供了机会,在这种条件下可能产生新的核物质相:夸克胶子等离子体(QGP)。相对论量子分子动力学模型(RQMD)是一个微观输运模型,它把含有新产生的粒子在内的所有... 详细信息

高能重离子碰撞为产生和研究在极高温度和能量密度条件下的热密核物质的性质提供了机会,在这种条件下可能产生新的核物质相:夸克胶子等离子体(QGP)。相对论量子分子动力学模型(RQMD)是一个微观输运模型,它把含有新产生的粒子在内的所有强子的经典传播(分子动力学)与量子效应,例如,随机散射,粒子衰变和入射核与靶核中核子碰撞时的泡利阻塞包含进来。重离子碰撞中产生的核物质的集体流是一种由动力学引起的空间-动量关联。在非对心重离子碰撞中,核物质的重叠区域是杏仁状的,坐标空间的非对称性是产生椭圆流的根源。在重离子碰撞中,粒子的产额和相空间的分布对于反应的动力学以及热密火球内部的状态来说是很敏感的。本文利用RQMD模型模拟了AGS能区的重离子碰撞,给出了2 AG eVAu+Au碰撞中产生的质子和π介子的横动量谱以及快度分布。质子的单粒子谱显示出了横向的集体流效应,而π介子的横动量谱受旁观者吸收等因素的影响较大。利用RQMD模型研究了2A G eVAu+Au碰撞中质子和π介子的椭圆流随横动量以及快度的分布。结果表明,质子与π介子的椭圆流受旁观者屏蔽效应的影响,及次级散射在流的形成和演化过程中是重要的。数据分析中,粒子的方位角分布是相对于估计事件平面计算的,由于事件的多重数受限,估计的事件平面与真实的事件平面存在一个偏离。本文利用RQMD模型,对2AGeV碰撞中估计反应平面的离散进行了分析,计算了反应平面离散的离散因子。

关键词：高能重离子碰撞 AGS能区 RQMD模型椭圆流方位角分布

如何促进发展中国家农村金融业的发展 ——以桑给巴为个案研究

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如何促进发展中国家农村金融业的发展 ...

作者： Masoud Saleh issa 西南大学

学位级别：硕士

在发展中国家,农村金融对促进贫困地区经济发展起到了重要的作用,受到经济学家、政府、政策制定者及捐赠者的广泛关注。尽管学术界和政府在农村金融发展过程中做出了许多努力,但对于发展中国家来说,它仍然是一个挑战,是发展中国家经济... 详细信息

在发展中国家,农村金融对促进贫困地区经济发展起到了重要的作用,受到经济学家、政府、政策制定者及捐赠者的广泛关注。尽管学术界和政府在农村金融发展过程中做出了许多努力,但对于发展中国家来说,它仍然是一个挑战,是发展中国家经济发展的薄弱环节。虽然在农村金融发展方面,人们已经进行了很多研究,并且取得了重大进步,但是人们的社会道德在发展农村金融中所起的作用却很少被关注。本文旨在研究人们的社会道德是否会对发展农村金融有帮助,主要经桑给巴尔为例。本研究调查了三个主要问题：ⅰ)家庭参与金融活动是否会受到社会道德的影响?ⅱ)社会价值观能否帮助完善金融活动?ⅲ)宗教机制在发展农村金融中扮演怎样的角色,以及为了加强农村金融建设,我们应该做些什么。本论文采用了定性分析法和问卷调查的方法开展研究。问卷调查过程中,采用分层随机抽样的方法,抽取131名参与者来完成问卷调查,然后用统计分析软件来分析问卷调查结果。研究结果显示,社会道德,确切的说是宗教价值观对家庭参与金融活动有着直接的影响。其次,如果社会道德能够很好地与金融体制改革结合起来,就会有利于发展促进金融业的发展,反之,会阻碍金融业的发展。此外,宗教当局及机构能够在推进农村金融建设中扮演重要的角色。此外,研究还表明伊斯兰银行体系可以成为金融体系的一个完美的替代品,因为非正式的金融体制有效性要弱一些,而正式的金融体制不仅没有为在桑给巴尔占多数的穷人服务,也不被桑给巴尔人的社会道德所接受。

关键词：农村金融社会道德发展中国家

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旅游业发展对桑给巴经济增长的影响研究

旅游业发展对桑给巴经济增长的影响研究

作者： Maryam issa Juma 西南大学

学位级别：硕士

旅游在经济增长和社会现代化进程中所起的作用已得到全世界人们广泛认可。由于这个原因,人们开始多方面尝试发展旅游业。旅游业对于很多国家来说都是具有重要价值的一项经济活动,这是一个广泛被接受的事实。旅游业的重要性还体现在它对...

旅游在经济增长和社会现代化进程中所起的作用已得到全世界人们广泛认可。由于这个原因,人们开始多方面尝试发展旅游业。旅游业对于很多国家来说都是具有重要价值的一项经济活动,这是一个广泛被接受的事实。旅游业的重要性还体现在它对外汇、就业、市场拓展、基础设施完善,以及对当地社区经济利益的影响。然而,它也可能会带来一些负面影响,诸如对文化冲突的影响。本论文研究了旅游业的增长对桑给巴尔经济增长的影响,旅游业给当地人民带来的利益和旅游业对桑给巴尔文化的影响。在20世纪80年代,丁香花的价格在国际市场下跌之后,桑给巴尔才开始在旅游领域开放。现在,在桑给巴尔,旅游业已成为它的第二支柱产业,占全GDP的14%,到2012年,有望增加到21%。具体来说,该研究测试了三种假设。它们是：旅游部门的完善对桑给巴尔GDP的增长做出了很大的贡献,当地居民从旅游业的增长中获益,以及该地的文化受到了旅游业的影响。研究结果显示,旅游业的发展对桑给巴尔的经济增长做出了重要贡献,当地居民从旅游业中获益,该地文化在一定程度上受到旅游业的影响。尽管研究显示旅游业确实对经济增长有重要贡献,但旅游业可以成为桑给巴尔一个更具潜力的经济领域。重要的是,政府要矫正所有提及的劣势,（从政策层面上）采取行动,实施这些提出的建议,例如为了桑给巴尔当前及以后长远的发展,完善基础设施,采取参与式管理。

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多级分离缓冲马铃薯收获机设计与试验

农业机械学报 2021年第2期52卷 96-109页

作者：张兆国王海翼李彦彬杨曦 IBRAHIM issa 张振东昆明理工大学农业与食品学院昆明650500 云南省高校中药材机械化工程研究中心昆明650500

针对云南山地黏土条件下马铃薯机械化收获分离效果差、明薯率低、伤薯率和破皮率较高等问题,采用多级分离振动、多重缓冲和低位侧铺的方式,设计了一种多级分离缓冲马铃薯收获机。在阐述机具整体结构及工作原理的基础上,通过理论计算确... 详细信息

针对云南山地黏土条件下马铃薯机械化收获分离效果差、明薯率低、伤薯率和破皮率较高等问题,采用多级分离振动、多重缓冲和低位侧铺的方式,设计了一种多级分离缓冲马铃薯收获机。在阐述机具整体结构及工作原理的基础上,通过理论计算确定了挖掘装置、多级分离缓冲装置、主动振动装置等主要关键部件的结构参数;建立抛送分离阶段薯土运动模型,获取微波浪形薯土分离相关技术特征;建立马铃薯筛面滑动模型,对薯块的运动特性进行理论分析,得出薯块顺流、回流的运动规律;分析土块在输送分离过程中的碰撞特性,确定了影响分离破碎效果的因素。以含杂率和土壤覆盖度为试验指标,采用二次旋转正交组合试验设计方法进行了空载试验,并利用高速摄影和三轴姿态传感器实时获取分离筛上土壤的分布状态和运动规律,结果表明,分离筛最佳工作参数组合为:一级分离筛线速度1.42 m/s、二级分离筛线速度2.2 m/s、侧输出线速度1 m/s,此时土壤覆盖度69.11%,含杂率2.56%。在分离筛最佳工作参数组合下,以明薯率、破皮率和伤薯率为试验指标进行了田间收获试验,结果表明:当工作速度1.05 m/s、挖掘深度180 mm、振动强度Ⅱ级、筛面倾角22°时,明薯率为99.1%、破皮率为1.41%、伤薯率为1.32%,各项性能指标均符合国家行业标准要求。

关键词：马铃薯收获机黏重板结土壤低位侧铺分离缓冲

钢丝网增强超高性能混凝土—混凝土组合柱轴压性能

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钢丝网增强超高性能混凝土—混凝土组合柱轴压性能

作者： issa Brown Mpalla 哈尔滨工业大学

学位级别：硕士

Construction of concrete filled UHPFRC tubes （Ultra High Performance FiberReinforced Concrete） results in systems with ductile characteristics, high stiffness andstrength. It also makes optimum use of materials based on their mechanical propertiesand resistance to corrosive environments. One such application is demonstrated inconcrete filled hybrid UHPFRC tubes. It is named Hybrid Composite Column （HCC）for the fact that it contains an additional wire mesh layer into the tube. The hybridUHPFRC tube provides the necessary additional longitudinal and transversereinforcement, as well as a permanent formwork for the concrete core. The concretecore contributes to the overall stability and stiffness of the composite system. Comparedto a conventional RC column, construction time is reduced because there are noformworks in sites, and compared to a segmental PC column, lifting load is significantlyreduced because of a void section （or empty core）. The present study is an experimentalinvestigation of HCC as structural column. The main focus of this research is on theuniaxial compression behavior of concrete confined with hybrid UHPFRC with1.5%and2%fiber volume （Vf） along with1.26%and2.52%transverse steel ratio （ρsv%）for core concrete. For the better confinement effect, the bond between the concrete coreand the tube is necessary throughout the length of the column. To achieve this, thethreaded bars were embeded through the columns as shear connectors. Size effect on strength of quasi brittle materials like concrete, ice and rock, in theliterature often referred as geo materials, has been an issue of discussion over the lastthree decades. Size effect investigations have been carried out either by experiments orthrough numerical simulations. Usually mechanical properties of specimens of differentsizes are investigated. The second part of this research has focused on the influences of specimen size ontensile behavior of an ultra high performance fiber reinforced concrete （UH

关键词：土木工程钢丝网增强超高性能混凝土混凝土组合柱轴压性能

Spectroscopic, thermal and magnetic properties of some transition metal complexes derived from 1-Phenyl-3-Substituted-4-Nitroso-5-Pyrazolones

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Natural Science 2010年第9期2卷 1035-1043页

作者： Samir A. AbdelLatif Yousry M. issa 不详

Complexes derived from some 1Phenyl3meth yl4nitroso5pyrazolone (L1), 1,3diphenyl4 nitroso5pyrazolone (L2) and 1phenyl3anilino 4nitroso5pyrazolone (L3) with Mn2+, Co2+, Ni2+, Cu2+ and Zn2+ metal ions have been prepared. Structural investigation of the ligands and their complexes has been made based on elemental analysis, infrared (FTIR), ultraviolet and visible spectra (UVVis.), proton nuclear magnetic reso nance (1H NMR), magnetic susceptibility (?eff.) and thermal analysis (TG and DTG). The effect of solvents has been carried out in organic solvents of varying polarity. The observed transition energy and oscillator strengths were also calculated. The data obtained show that all of the prepared complexes contain water molecules in their coordination sphere. The investigated ligands acts as neutral bidentate ligands bonded to the metal ions through the two oxygen atoms of the carbonyl and nitroso groups. The isolated complexes behave as nonelectro lyte in DMF solution. The Mn2+, Co2+, Ni2+ and Cu2+ complexes show high spin configurations as the ground state. The high spin values of ma gnetic susceptibility may be due to the ligands being weak ligands. The Mn2+, Co2+, Ni2+, Cu2+ and Zn2+ complexes exhibit an octahedral or distorted octahedral coordination with the investigated ligands.

关键词： Nitrosopyrazolones Transition Metal Complexes Spectroscopic Thermal Magnetic studies