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Discovery of a novel 112-type iron-pnictide and la-doping induced superconductivity in Eu_(1-x)la_xFeAs_2(x=0–0.15)

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Science Bulletin 2017年第3期62卷 218-221页

作者： Jia Yu Tong Liu Bo-Jin Pan Bin-Bin Ruan Xiao-Chuan Wang Qing-ge Mu Kang Zhao gen-Fu Chen Zhi-An Ren Institute of Physics and Beijing National laboratory for Condensed Matter Physics Chinese Academy of Sciences Beijing 100190 China Collaborative Innovation Center of Quantum Matter Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100039 China

We report the discovery and characterization of a novel 112-type iron pnictide EuFeAs2, with la-doping induced superconductivity in a series of Eu1- xlaxFeAs2. The polycrystalline samples were synthesized through solid state reaction method only within a very narrow temperature window around 1073 K. Small single crystals were also grown from a flux method with the size about 100μm. The crystal structure was identified by single crystal X-ray diffraction analysis as a monoclinic structure with space group of P2 1/m. From resistivity and magnetic susceptibility measurements, we found that the parent compound EuFeAs2 shows distinct anomalies probably due to the Fe2＋ related antiferromagnetic/structural phase transition near 110K and the Eu2＋ related antiferromagnetic phase transition near 40K. la-doping suppressed both phase transitions to lower temperatures and induced superconducting transitions with a Tc - 11 K for Eu0.85la0.15FeAs2.

关键词： EuFeAs2 Superconductivity la-doping Antiferromagnetic transition

En quête de neutralité carbone:la Chine s'efforce d'atteindre ses objectifs en matiere de carbone

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中国与非洲（法文版） 2022年第4期14卷 24-25页

作者： ge LIJUN DANG XIAOFEI 不详

Ultra-broadband,fast,and polarization-sensitive photoresponse of low-symmetry 2D NdSb_(2)

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Nano Research 2022年第6期15卷 5469-5475页

作者： Gang Li Hanlin Zhang Yong Li Shiqi Yin Xucai Kan Wensen Wei Haifeng Du Binghui ge Chao An Mingliang Tian Feng Yan Sanjun Yang Tianyou Zhai Liang Li Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China Engineering Technology Research Center of Magnetic Materials School of Physics and Materials ScienceAnhui UniversityHefei 230601China Anhui Province Key laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory of the Chinese Academy of ScienceHefei 230031China Department of Applied Physics The Hong Kong Polytechnic UniversityKowloonHong Kong 999077China State Key laboratory of Materials Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China

Broadband photodetectors with polarization-sensitive ability have received extraordinary attention for modern optoelectronic *** photodetectors should possess high responsivity,fast response,and good stability,which are rare to meet at the same time in one low-symmetric two-dimentional(2D)*** this work,neodymium diantimonides(RSb_(2)),a member of light rare-earth diantimonides RSb_(2)(R=la–Nd,Sm)with low-symmetry structure,is introduced as a fascinating highly anisotropic 2D material for broadband detection(532 nm to 4μm).The photodetector exhibits a responsivity of 0.49 mA·W^(−1)with 15μs response time at 532 nm and highly stable performance under ambient conditions over 8 ***,we identify the polarization-sensitive photoresponse of the detector and demonstrate a high anisotropic factor~*** addition,strong inplane anisotropy is revealed by anisotropic phonon response and the photodetection mechanism is investigated by scanning photocurrent microscopy *** pioneer work on RSb_(2)paves the way for further exploration of 2D RSb_(2)for high performance polarized photodetectors with fast photothermoelectric response.

关键词： ultra-broadband fast response polarization-sensitive photodetector RSb_(2)

REMARQUES SUR LES QUADRIQUES ASSOCIEES AUX POINTS D’UNE SURFACE

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中国数学会学报 1937年第1期 1-5页

作者： LUCIEN GODEAUX Liége,Université

On sait que Lie a attachéàtout point d’une surface(x)unequadrique osculatrice appelée quadrique de, *** avons montréque cette quadrique est la première d’une suite de quadriques Φ,Φ,... attachée intrinsèquement àtont point x de la surface (x),d(?)quadiques consécutives de cette suite se touchant en quatre points,caractéristiques pour les deux quadriques eu question.

关键词： AUX REMARQUES SUR LES QUADRIQUES ASSOCIEES AUX POINTS D’UNE SURFACE LES SUR

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电力系统高阻接地故障保护综述

华东电力 2011年第5期39卷 753-756页

作者：葛乃成刘艳敏倪腊琴华东电网有限公司上海200002 华东电网有限公司培训中心上海200438

电力系统发生高阻接地故障时的故障电流突变量很小,常规过电流保护装置无法可靠检测。介绍了高阻接地故障的主要特征、保护动作不灵敏的原因以及与高阻接地相关的规定,并对国内外进行的相关研究、国内保护的技术指标和检测的局限性等进... 详细信息

电力系统发生高阻接地故障时的故障电流突变量很小,常规过电流保护装置无法可靠检测。介绍了高阻接地故障的主要特征、保护动作不灵敏的原因以及与高阻接地相关的规定,并对国内外进行的相关研究、国内保护的技术指标和检测的局限性等进行了分析,阐述了高阻保护装置使用的必要性、可靠性和供电连续性。

关键词：故障检测高阻接地故障低故障电流配电系统保护装置

Analysis of phototactic responses in Spodoptera frugiperda using Helicoverpa armigera as control

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Journal of Integrative Agriculture 2021年第3期20卷 821-828页

作者： LIU Ying-jie ZHANG Dan-dan YANG Li-yu DONG Yong-hao LIANG ge-mei Philip DONKERSLEY REN Guang-wei XU Peng-jun WU Kong-ming Key laboratory of Tobacco Pest Monitoring Controlling&Integrated Management Tobacco Research InstituteChinese Academy of Agricultural SciencesQingdao 266101P.R.China State Key laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China lancaster Environment Centre Lancaster UniversityLancasterLA14YQUK

Light traps are widely utilized to monitor and manage insect pest *** late 2018,the fall armyworm(FAW),Spodoptera frugiperda,invaded China through Yunnan Province representing a huge threat to grain *** estimate the efficiency of light traps on FAW moths,we first identified the opsin genes from FAW by using the *** analysis indicated that the four opsins of FAW were clustered with those of other Noctuidae *** expressed levels of opsins in *** were lower than in Helicoverpa armigera,suggesting a different phototactic response between the two ***,we determined the phototactic behavior of FAW using *** as a control,which is widely monitored and managed using light traps in *** results indicated that the two moths species showed significantly different phototactic behavior and both female and male FAW displayed faster flight-to-light speed than *** may be due to a faster flight capacity in FAW compared to ***,the capture rate of both female and male of *** was significantly lower than that of ***,which was consistent with the expression levels of *** results support the positive phototaxis of *** moths and suggest light traps could be used for monitoring and managing the pests,but with a lower efficiency than ***.

关键词： Spodoptera frugiperda Helicoverpa armigera light performance opsin genes light trap

The role of airborne particles and environmental considerations in the transmission of SARS-CoV-2

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geoscience Frontiers 2021年第5期12卷 1-16页

作者： Longyi Shao Shuoyi ge Tim Jones M.Santosh Luis F.O.Silva Yaxin Cao Marcos L.S.Oliveira Mengyuan Zhang Kelly BéruBé State Key laboratory of Coal Resources and Safe Mining China University of Mining and Technology(Beijing)Beijing 100083China College of geoscience and Surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Earth and Environmental Sciences Cardiff UniversityMuseum AvenueCardiffCF103YEUK School of Earth Sciences and Resources China University of Geosciences BeijingBeijing 100083China Department of Earth Science University of AdelaideAdelaideSA 5005Australia Department of Civil and Environmental Universidad de la CostaCalle 58#55-66080002 BarranquillaAtlánticoColombia Departamento de Ingeniería Civil y Arquitectura Universidad de LimaAvenida Javier Prado Este 4600-Santiago deSurco 1503Peru School of Biosciences Cardiff UniversityMuseum AvenueCardiff CF103AXWalesUK

Corona Virus Disease 2019(COVID-19)caused by the novel coronavirus,results in an acute respiratory condition coronavirus 2(SARS-CoV-2)and is highly *** recent spread of this virus has caused a global ***,the transmission routes of SARS-CoV-2 are being established,especially the role of environmental *** we review the environmental transmission routes and persistence of *** studies have established that the transmission of this virus may occur,amongst others,in the air,water,soil,cold-chain,biota,and surface *** has also been found that the survival potential of the SARS-CoV-2 virus is dependent on different environmental conditions and *** important pathways include aerosol and fecal *** matter may also be a carrier for *** microscopic particles can be easily absorbed by humans,more attention must be focused on the dissemination of these *** considerations are required to evolve a theoretical platform for epidemic control and to minimize the global threat from future epidemics.

关键词： Aerosol Airborne particles COVID-19 Environmental media SARS-CoV-2

西藏寺庙书屋建设现状和对策研究——以色拉寺寺庙书屋为例

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西藏艺术研究 2020年第3期 88-92页

作者：格桑拉泽西藏自治区图书馆

随着国家对西藏建设的投放量逐渐加大,建设过程中物质的与精神的并存,在社会主义新西藏,"寺庙书屋"应运而生了。"寺庙书屋"解决的是僧人阶层"看书难"、"用书难"、"借书难"的问题,迎合了僧人的精神文化需求。当前,实地考察"寺庙书屋"建... 详细信息

随着国家对西藏建设的投放量逐渐加大,建设过程中物质的与精神的并存,在社会主义新西藏,"寺庙书屋"应运而生了。"寺庙书屋"解决的是僧人阶层"看书难"、"用书难"、"借书难"的问题,迎合了僧人的精神文化需求。当前,实地考察"寺庙书屋"建设和发展情况是一项崭新和特殊的课题。文章通过案例研究的方法,实地对色拉寺的寺庙书屋进行采访,呈现出西藏"寺庙书屋"发展的一个全景,并且对"寺庙书屋"发展中存在的一些问题提出相应对策。

关键词：色拉寺寺庙书屋现状分析对策建议

关系网络与地下经济基于上海一个自行车黑市的研究

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社会 2013年第2期33卷 131-155页

作者：强舸复旦大学国际关系与公共事务学院

本文以一个自行车黑市为案例,考察关系网络与地下经济活动相互作用的动态过程。研究表明,自行车黑市活动衍生的关系网络促进了信息传递,提升了信任水平,降低了安全风险,增加了黑市的效益,塑造出互惠的交易模式。随着黑市的运作,关系网... 详细信息

本文以一个自行车黑市为案例,考察关系网络与地下经济活动相互作用的动态过程。研究表明,自行车黑市活动衍生的关系网络促进了信息传递,提升了信任水平,降低了安全风险,增加了黑市的效益,塑造出互惠的交易模式。随着黑市的运作,关系网络继续演化,当信息和信任积累到一定程度时,黑车贩子间达成了关于货源收购和价格同盟的卡特尔协议,黑市的运作方式再一次被改变。关系网络对潜在违规力量产生威慑,起到维护市场秩序的作用。

关键词：关系网络地下经济信息信任违规倾向