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High-resolution and instantaneous imaging of latent fingerprints

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Chinese Chemical Letters 2023年第4期34卷 1-2页

作者： Ming Cheng Juli Jiang jean-claude Chambron Leyong Wang Key Laboratory of Mesoscopic Chemistry of MOE Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Institut de Chimie de Strasbourg UMR 7177CNRSUniversitéde StrasbourgStrasbourg Cedex 67008France

Fingerprints can serve as an information storage platform for individuals and play an important role in forensic investigation and security[1].Most of them are invisible to the naked eye and are called latent fingerprints(LFPs).Conventional imaging techniques suffer from limitations like low resolution and sensitivity[2],restricting the recognition of LFPs to macroscopic features,such as shape,core,ending,bifurcation,island,pores,and so on,which correspond to levels 1 and *** of level 3 including ridges and their edges,are challenging to recognize.

关键词： latent resolution restrict

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Local Plants Potentially Suitable for Phytoremediation of Soils Polluted by Heavy Metals: The Case of Landfill Sites

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Journal of Geoscience and Environment Protection 2024年第7期12卷 72-88页

作者： Kpan Kpan Kouakou Gains Touré Mamadou Ouattara Nouffou Doudjo Kouassi Kouadio claude Ehouman N’guetta Moïse Ouattara Djibril Tiho Seydou UFR Sciences de la Nature Universit Nangui Abrogoua Abidjan Cte dIvoire UFR Agroforesterie Universit Jean Lorougnon Gud Daloa Cte dIvoire

Landfills are contaminated sites that need to be cleaned up to prevent human and environmental exposure to pollutants. This article aims to identify local plants capable of restoring soil polluted by heavy metals. To this end, plant species at the Bonoua landfill were inventoried. X-ray fluorescence spectrometry was used to determine the heavy metal content of soil and plants from the landfill. The bioconcentration factor (BCF) of metals in plants was evaluated. The Bonoua landfill is covered with 62 plant species, comprising 28 botanical families and 50 genera. The BCF varied from 0.08 (titanium) to 2.27 (strontium) for Phyllanthus amarus;from 0.06 (titanium) to 1.83 (copper) for Alternanthera sessilis and from 0.03 (arsenic) to 2.10 (strontium) for Amaranthus spinosus. Phyllanthus amarus, Alternanthera sessilis, and Amaranthus spinosus are strontium-accumulating species (BCF > 1). Similarly, copper BCF values were above 1 for Phyllanthus amarus, and Alternanthera sessilis. These two plant species are therefore copper accumulators. In short, Phyllanthus amarus, Alternanthera sessilis, and Amaranthus spinosus are candidate species for phytoremediation of heavy metal-polluted soils, given their BCF > 1.

关键词： Heavy Metals Phytoremediation Phyllanthus amarus Alternanthera sessilis Amaranthus spinosus

An Empirical Analysis Study on the Efficacy of a Routing Algorithm for Saving Energy in Wireless Sensor Networks

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An Empirical Analysis Study on the Efficacy of a Routing Alg...

作者： jean claude Loua 湖南大学

学位级别：硕士

无线传感器网络(WSNs)是由大量节点部署组成的一项智能技术。对传感器网络日益增长的研究,给我们带来了众多的和多元化的应用。在其早期,传感器节点被用于军事目的,观察敌人的地理坐标、军事设备,从而定位到战场中。它也用于环境中：森... 详细信息

无线传感器网络(WSNs)是由大量节点部署组成的一项智能技术。对传感器网络日益增长的研究,给我们带来了众多的和多元化的应用。在其早期,传感器节点被用于军事目的,观察敌人的地理坐标、军事设备,从而定位到战场中。它也用于环境中：森林火灾、自然灾害;灾难、地震、火山、洪水等等。出于环境目的使用传感器节点的必要性是为了人类的生存。现在也在人类日常生活中使用,例如智能学习、交通道路控制、水质监测、管道监测等。此外,在健康(在医院监测家中的病人、显微外科手术)、农业、物业监控(建筑、汽车等)和仅列举几个例子的工业方面有良好的声誉。这些不同的应用意味着无线传感器网络是人类生活状况现代化的一个组成部分。节点的运转主要依赖储存在物理电池里的能源资源。节点的能量资源是有限的,其必须基于一个有效的路由算法以最优的方式使用。在研究工作中,我们假定一个事实,一旦传感器节点让其组件以一个低效的路由协议去实现任何基本通信,这将对数据信息的传输过程产生不利影响。它将使节点迅速耗尽能量且过早死亡因此,某些节点由于缺乏能量动力会停止通信活动。这类情况可能会导致具有两种显著不同的域：第一种,还有一些节点具有一些残留的能量,这些被算作活节点;第二种情况是死亡节点的域,这些节点没有任何可以完成通信活动的残余能量。换句话说,它们的能量水平低于阂值。特别是对于用于军事目的和民事用途的无线传感器网络的应用,第二种情况看起来很糟糕。除了能源问题,还有其他问题,这些被归类到无线传感器网络问题的第二类,也就是安全问题--数据传输安全、少量内存存储备份检索到的数据、安装在节点上的操作系统的更新问题、节点开始任何活动前保持静态和节点位置从一个地方到另一个地方的改变都仍然重要的拓扑问题、编程问题等。在所有提及的问题中,能源仍然是无线传感器网络中毋庸置疑地最有挑战性的概念,相对于以上提及的其他问题,也一直是最吸引众多研究者的领域。究其原因,自从无线传感器网络的研究开始以来,在能源演化方面没有记录足够的进步且它的图示至今仍然停滞。在这项研究中,我们遇到能源问题,并提出了一个路由算法,称为簇间平方单元多跳路由算法,旨在减轻阻塞,以便应用中任何节点之间的通信成本函数最小化。在节点设计时能量利用问题的研究依然是非常重要的,因为在大多数情况下,更换电池是不可能的。因此,这就使得能量问题变得棘手。这意味着,传感器节点的寿命在很大程度上依赖于电池的能量。在无线传感器网络中,传输过程是非常耗能的,这就是为什么现在研究的重点是在缓解能源消耗的基础上通过不同的路由算法来降低能源消耗,这些算法能够很好的降低能量消耗。为了解决这个问题,一般概念的节点通常设在有危险的环境中,在其中真实存在的人类不能如前所述的去探寻。对于这个特殊的方面,节点的设计必须遵循一个自我组织的概念。结点组件的概述表明,它配备了一个传感器、微型计算机、收发器和电源,其组件的每个实体都扮演着不同的角色,使该节点可以正常运行而没有任何副作用。在节点开始网络通信活动之前,它必须知道其邻居节点和它本身之间每一个单一连接路由的成本函数的值。使用节点能量的成本函数来选择最佳目的节点的问题是我们提出的解决方案的基石,基于最低成本函数,源节点选择这个合适的目的节点。近年来,无线传感器网络的研究工作给予成本函数更多关注,这与节点的能量消耗密切相关。为了避免传感器节点消耗大量的电力资源,研究人员提出许多路由算法来减少能源损耗。在我们的研究工作中,正如我们前面所提到的,我们旨在使用成本函数去找到一条便捷的路径,以致传感器节点能够将得到的数据传播到相应的目的节点。考虑普通节点到最后的目的节点的中间成本函数的综合,计算出成本函数值。为了实现这一有效成本函数的目标,建立一个有效的高效路由算法是可取的,从通信过程中选择最佳成本函数。这意味着,不选择代价高的路径,因此节点可以节省很多电力资源。至于成本函数方面,已有大量之前提出的方案来缓解传感器节点设计时的能量利用方法。我们的研究工作或多或少的参考其中的一些方案。我们把一些路由算法的不足之处当作灵感元素,而且也是我们研究工作的重点。我们首先观察了低功耗自适应集簇分层型协议(LEACH)。LEACH协议是第一个提出来采用随机分布式均匀成簇机制的分簇路由协议,该协议适合传感器节点同质且静态分布的环境。在LEACH中,传感器节点基于一些参数比如接受信号强度最大的簇头选择他们的主簇。在一定间隔后,一些节点被选为簇头。LEACH协议通过簇头轮转的方式来维持节点的能量平衡,在网络中均匀地分散能量负荷,且当不需要时关闭普通节点。传感器信息系统低功耗PEGASIS借鉴了LEACH中分簇算法的思想。PEGASIS形成了传感器节点链。传感器节点从邻居节点那传输或接收数据,这样PEGASIS避免簇的形成且在链中只

关键词：普通节点主节点集群平方单元传感器网络能耗成本函数

How to Create Real Labor: the Study on Work-Based Learning Model in Zhejiang Technological and Vocational Colleges-Taking Zhejiang Industry Polytechnic College as An Example

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How to Create Real Labor: the Study on Work-Based Learning M...

作者： Bigirimana jean claude 浙江师范大学

学位级别：硕士

The main objective of this research was to study the work-based learning model in Zhejiang Technological and Vocational Colleges and Zhejiang Industry Polytechnic College located in Shaoxing city was taken as a sample of vocational colleges in Zhejiang *** researcher wanted to explore the significant of the Work-based learning model as well as the strengths and challenges in implementing of this system especially by focusing on apprenticeship through practice in classroom *** study employed a qualitative research method and data were collected in Zhejiang Industry Polytechnic College in November ***（8）teachers and ten（10）students from different majors at that vocational college were participated in this *** was also employed interview with teachers,students in order to identify the strengths and challenges of the work-based learning practices in Zhejiang Province and how learners use materials available without forgetting to study the challenges encountered by teachers and students during practice in classroom *** study was analysed the link between theories in classroom and practice in classroom training through the teaching model available in work-based learning as well as the quality of the teaching assured in order to give some suggestions to policy makers and relevant stakeholders in Zhejiang Technological and Vocational *** data analysis,according to the participants’responses and the researcher’s observations the findings show strengths and challenges in work-based learning implementation in Zhejiang Industry Polytechnic College:firstly,the college has almost enough materials to train students in classroom training even if in some classroom the material is not totally due to the high number of students in some *** the classroom practices,the largest training centres named SHAOXING PUBLIC TRAINING CENTER（referred to as“the base”（基地））in Shaoxing city is located at Zhejiang Industry Polytechnic Coll

关键词： Higher Vocational Education classroom teaching Work-basedLearning

Electrochemical ageing study of mixed lanthanum/praseodymium nickelates La2-xPrxNiO4+δ as oxygen electrodes for solid oxide fuel or electrolysis cells

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Journal of Energy Chemistry 2020年第7期29卷 62-70,I0003页

作者： Vaibhav Vibhu Aurélien Flura Aline Rougier Clément Nicollet Sébastien Fourcade Teresa Hungria jean-claude Grenier jean-Marc Bassat CNRS Univ.BordeauxBordeaux INPICMCBUMR 5026F-33600 PessacFrance Centre de Microcaractérisation Raimond CASTAING Universitéde ToulouseCNRSUT3–Paul SabatierINPINSAEspace Clément Ader3 rue Caroline AigleToulouse 31400France

The chemical and electrochemical stability of lanthanide nickelates La2 NiO4+δ(LNO),Pr2 NiO4+δ(PNO)and their mixed compounds La(2-x)PrxNiO4+δ(LPNOs)with x=0.5,1 or 1.5 is *** aim is to promote these materials as efficient electrodes for solid oxide fuel cell(SOFC)and/or solid oxide electrolysis cell(SOEC).La2 NiO4+δand La1.5Pr0.5NiO4+δcompounds are chemically very stable as powders over one month in the temperature range 600-800℃,while the other materials rich in praseodymium progressively decompose into various perovskite-deriving components with additional Pr6 *** their uneven properties,all these materials are quite efficient and sustainable as electrodes on top of gadolinium doped ceria(GDCBL)//yttrium doped zirconia(8 YSZ)electrolyte,for one month at 700℃without *** polarization(300 mA·cm-2),the electrochemical performances of LNO,PNO and La1.5Pr0.5NiO4+δ(LP5 NO)quickly degrade in SOFC mode,*** the oxygen reduction reaction,while they show durability in SOEC mode,*** the oxide oxidation reaction.

关键词： Lanthanide nickelates SOFC cathode SOEC anode Stability Inductive loop Degradation

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B-spline surface fitting to mesh vertices

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Science China(Information Sciences) 2017年第7期60卷 259-261页

作者： Yang LU Junhai YONG Kanle SHI Hejin GU Ping ZHENG jean-claude PAUL School of Software Tsinghua University Department of Computer Science and Technology Tsinghua University Key Laboratory for Information System Security Ministry of Education of China Tsinghua National Laboratory for Information Science and Technology Tsinghua University Department of Research & Development Jiangxi Academy of Science Department of Mathematics and Computer Science Nanchang Normal University

Here we propose a novel method of fitting B-spline surfaces to input mesh *** a mesh model that is difficult to fit with one B-spline surface,we divide it into several patches that form a tree structure(which is called hierarchical splines[1]),and for each patch,we use one B-spline surface for ***,only a few patches are required,and G2continuity can be achieved between the adjacent surfaces.

关键词： B-spline surface fitting to mesh vertices

Efficiency and productivity analysis of vegetable farming within root and tuber-based systems in the humid tropics of Cameroon

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Journal of Integrative Agriculture 2017年第8期16卷 1865-1873页

作者： Ajapnwa Akamin jean-claude Bidogeza Jules Rene Minkoua N Victor Afari-Sefa Faculty of Economics and Management University of Yaounde IIP.O.Box 18 Soa YaoundeCameroon Liaison Office Cameroon West and Central AfricaWorld Vegetable CenterP.O.Box 2008 Messa YaoundeCameroon Samanko Research Station West and Central AfricaWorld Vegetable CenterP.O.Box 320 BemakoMali

The study analyzes the technical efficiency of vegetable farmers in root and tuber-based farming systems within selected sites of the humid tropics of Cameroon. Multistage sampling was used to collect primary data from a cross-section of vegetable farmers drawn from eight selected sites in Santa sub division, Northwest region of Cameroon. Stochastic frontier analysis was used to estimate the technical efficiency of vegetable farmer and to examine its determinants. The results showed that farmyard manure was the most productive factor input, followed by farm equipment and labor. The mean technical efficiency level was 67%, revealing production shortfalls and indicating possibilities of significantly increasing production with the current input Jevels. Female, as well as more educated farmers were found to be significantly more efficient than their counterparts. The results also showed that farmers become less technical efficient as farm sizes become larger. Our study findings suggest that smallholder farmers＇ access to manure, farm implements, and increased women participation in vegetable farming, will produce huge payoffs in vegetable production efficiency in Cameroon.

关键词： technical efficiency vegetable productivity farming systems intensification crop diversification stochasticfrontier analysis

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Results of the First 10 Cases of Coronary Bypass Surgery in Senegal

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World Journal of Cardiovascular Surgery 2024年第4期14卷 45-60页

作者： Papa Amath Diagne jean claude Ndiogou Dione Papa Ousmane Ba Momar Sokhna Diop El Hadji Boubacar Ba Momar Dioum Marième Soda Mbaye Moussa Seck Diop Mory Camara Abdou Lahad Mbengue Abdou Aziz Thiaw Abdoul Khoudoss Diallo Moussa Mareme Samba Dialtabé Ibrahima Guéssé Ba Anta Mbaye Sall Papa Salmaneba Amadou Gabriel Ciss Department of Cardiovascular and Thoracic Surgery FANN National University Hospital Dakar Senegal

This is a review of the first 10 coronary artery bypass surgeries performed by the local team. The mean age was 62 years old [45 - 74]. The patients were predominantly male, with a M/F ratio of 4:1. Cardiovascular risk factors were mainly myocardial infarction (MI) (60%), hypertension (50%), obesity (40%) and diabetes (30%), with at least two risk factors per patient. Angina was the main symptom (80%). The average time from presentation to surgery was 8 months. The mean Euroscore 2 was 2.92 ± 1.65 [1.33 - 6.60]. Coronary angiography revealed an average of 2 lesions per patient, with 3-vessel involvement in 70% of cases: the Interventricular artery (IVA) (100%), the right coronary artery (90%) and the circumflex artery (70%). On echocardiography, the mean Left ventricular ejection fraction (LVEF) was 59% [33% - 76%]. All patients underwent median sternotomy with bypass grafting. The average duration of the cardiopulmonary bypass was 150 min [46 - 275 min];that of aortic clamping, 120 min [43 - 232 min]. The grafts used were internal thoracic artery (ITA) in 100% of cases (80% on the left and 20% on the right), and the great saphenous vein (GSV) in 60% of cases (50% on the left and 10 on the right). Double bypass was performed in 60% of cases, single bypass in 30% and triple bypass in 10%. The bypasses were performed on the IVA (100%), the middle lateral of the circumflex (30%) and the bisector (20%). The average time to extubation was 11 hours and the length of stay in the intensive care unit was 7 days [03 - 17 days]. One patient had a reoperation on Day 0 post-op. The average hospital stay was 13 days [06 - 27 days]. Complications occurred in nine of the patients (90%), with a predominance of infectious and neurological complications. Overall operative mortality was 3%, all in intensive care.

关键词： Coronary Bypass Surgery Coronary Lesions Cardiac Surgery Senegal

Efficient unidirectional polarization-controlled excitation of surface plasmon polaritons

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Light(Science & Applications) 2014年第1期3卷 100-105页

作者： Anders Pors Michael G Nielsen Thomas Bernardin jean-claude Weeber Sergey I Bozhevolnyi Department of Technology and Innovation University of Southern DenmarkOdenseDenmark LICB UMR 6303 CNRS–University of BurgundyF-21078 DijonFrance

Efficient excitation of surface plasmon polaritons(SPPs)remains one of the most challenging issues in areas of plasmonics related to information communication *** particular,combining high SPP excitation efficiency and acceptance of any polarization of incident light appeared to be impossible to attain due to the polarized nature of *** we demonstrate plasmonic couplers that represent arrays of gap SPP resonators producing upon reflection two orthogonal phase gradients in respective linear polarizations of incident *** couplers are thereby capable of efficiently converting incident radiation with arbitrary polarization into SPPs that propagate in orthogonal directions dictated by the phase *** couplers operate at telecom wavelengths and feature the coupling efficiency of,25%for either of two linear polarizations of incident radiation and directivity of SPP excitation exceeding *** further demonstrate that an individual wavelength-sized unit cell,representing a meta-scatterer,can also be used for efficient and polarization sensitive SPP excitation in compact plasmonics circuits.

关键词： gap surface plasmons metamaterials metasurfaces surface plasmon polaritonsgap surface plasmons metamaterials metasurfaces surface plasmon polaritons