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Multilayer network analysis:new opportunities and challenges for studying animal social systems

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Current Zoology 2021年第1期67卷 45-48页

作者： Matthew j.hASENjAGER Matthew SILk David N.FIShER Department of Biological Sciences Royal HollowayUniversity of LondonEghamUK Centre for Ecology and Conservation University of ExeterExeterUK School of Biological Sciences University of AberdeenAberdeenUK

Introduction Many behavioral,ecological,and evolutionary processes are closely intertwined with patterns of social interactions,such as the evolution of cooperation(Croft et al.2006),information and disease transmission(VanderWaal et al.2014;Aplin et al.2015),predator-prey dynamics(Ioannou et al.2012),and dispersal decisions(Blumstein et al.2009).Even in species where individuals are traditionally viewed as leading a relatively solitary existence,interac-tions occur across diverse contexts,including territorial defense,resource competition,and courtship.

关键词： solitary predator network

Lattice expansion and smaller CuO_(x)CeO_(2-δ)particles formation by magnesium interaction for low temperature CO oxidation

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journal of Rare Earths 2021年第4期39卷 434-439页

作者： j.M.Waikar R.K.More N.R.Lavande P.M.More Department of Chemistry Institute of Chemical TechnologyMatungaMumbai400019India

A series of magnesia doped CuOxCeO_(2-δ)catalysts were prepared by co-precipitation followed by impregnation method and investigated for CO *** manuscript is devoted to explaining the role of MgO for the formation of active species on the CuOxCeO_(2-δ)*** improvement in catalytic activity is ascribed to the formation of various active species due to the interaction of magnesia with CuOxCeO_(2-δ).The catalysts were characterized by PXRD,N_(2)adsorption,h_(2)-TPR,XPS,SEM,EDS and hRTEM *** Mg doped catalyst shows lattice expansion of ceria due to the formation of smaller Ce^(3+)species with oxygen *** Mg-O bond also takes part in CO activation and oxidation,which results in the increase of CO *** Mg doped CuOxCeO_(2-δ)catalyst shows improvement in low temperature activity compared with the CuOxCeO_(2-δ).

关键词： Adsorbed oxygen Lattice expansion Low temperature oxidation Ce^(3+) Cu^(+) Rare earths

Rational design of palladium single-atoms and clusters supported on silicoaluminophosphate-31 by a photochemical route for chemoselective hydrodeoxygenation of vanillin

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Nano Research 2021年第11期14卷 4347-4355页

作者： Xiaowen Lu Chunmu Guo Mingyang Zhang Leipeng Leng j.hugh horton Wei Wu Zhijun Li joint International Research Laboratory of Advanced Chemical Catalytic Materials&Surface Science College of Chemistry and Chemical EngineeringNortheast Petroleum UniversityDaqing163318China National Center for International Research on Catalytic Technology School of Chemistry and Material ScienceHeilongjiang UniversityHarbin150080China Department of Chemistry Queen’s UniversityKingstonK7L 3N6Canada

Chemoselective hydrodeoxygenation of vanillin is of great importance in converting biomass into high value-added ***,we describe a facile photochemical route to access palladium single atoms and clusters supported on silicoaluminophosphate-31(SAPO-31)as a highly active,chemoselective,and reusable catalyst for hydrodeoxygenation of *** by aberration-corrected high-angle annular dark-field scanning transmission electron microscopy,extended X-ray absorption fine structure measurement,and CO-absorbed diffuse reflectance infrared Fourier transform spectroscopy reveal the atomically dispersed palladium single atoms and clusters are loosely bonded and randomly dispersed,without forming strong palladium-palladium metallic bonding,over the SAPO-31 *** catalyst,with a full metal availability to the reactants,exhibits exceptional catalytic activity(TOF:3,000 h^(−1),Yield:>99%)in the hydrodeoxygenation of vanillin toward 2-methoxy-4-methylphenol(MMP)under mild conditions(1 atm,80°C,30 min),along with excellent stability,scalability(up to 100-fold),and wide substrate *** superior catalytic performance can be attributed to the synergistic effect of the positively charged palladium single atoms and fully exposed clusters,as well as the strong metal-support *** work may offer a new avenue for the design and synthesis of fully exposed metal catalysts with targeted functionalities.

关键词： heterogeneous catalysis photochemical reduction palladium single atoms and clusters atomic dispersion hydrodeoxygenation vanillin

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美国白松铜矿应用标准软件进行矿床构模

国外金属矿山 1996年第5期21卷 59-64页

作者： j.h.海尔曼 j.E.蒂尔克刘勇德国萨赫特莱本矿山公司咨询部美国白松铜矿

位于美国密歇根州的白松（WhitePine）铜矿采用房柱法开采一个缓倾斜的层状铜矿床，年产原矿499万t（550万短吨）。3～5m厚的矿脉由4个富矿层组成。矿床开来以矿床中铜采出量最大为原则，按边际品位0．95％，采用4种不同的开采方式进行... 详细信息

位于美国密歇根州的白松（WhitePine）铜矿采用房柱法开采一个缓倾斜的层状铜矿床，年产原矿499万t（550万短吨）。3～5m厚的矿脉由4个富矿层组成。矿床开来以矿床中铜采出量最大为原则，按边际品位0．95％，采用4种不同的开采方式进行。在多年应用专用程序和商业矿山软件包之后，自1990年起逐渐应用标难软件包进行矿床构模。本文描述了应用SURFER软件进行钻孔数据插值和块段计算、用dBase进行开采方式优选以及应用AutoCAD进行矿床范围调整的过程。最后探讨了如何应用矿床模型编制生产计划。

关键词：铜矿矿床构模标准软件采矿

Single palladium atoms stabilized byβ-FeOOh nanorod with superior performance for selective hydrogenation of cinnamaldehyde

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Nano Research 2022年第4期15卷 3114-3121页

作者： Zhijun Li Leipeng Leng Xiaowen Lu Mingyang Zhang Qian Xu j.hugh horton junfa Zhu joint International Research Laboratory of Advanced Chemical Catalytic Materials&Surface Science College of Chemistry and Chemical EngineeringNortheast Petroleum UniversityDaqing 163318China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Department of Chemistry Queen′s UniversityKingstonK7L 3N6Canada

Atomically dispersed single atom catalysts represent an ideal means of converting less valuable organics into value-added chemicals of interest with high ***,we describe a facile synthetic approach to create defect-containingβ-FeOOh doped with isolated palladium atoms that bond covalently to the nearby oxygen and iron *** presence of singly dispersed palladium atoms is confirmed by spherical aberration correction electron microscopy and extended X-ray absorption fine structure *** single palladium atom catalyst manifests outstanding catalytic efficiency(conversion:99%;selectivity 99%;turnover frequency:2,440 h^(-1))in the selective hydrogenation of cinnamaldehyde to afford *** measurements and density functional theory(DFT)calculations elucidate the high catalytic activity and the strong metal-support interaction stem from the unique coordination environment of the isolated palladium *** findings may pave the way for the facile construction of single atom catalysts in a defect-mediated strategy for efficient organic transformations in heterogeneous catalysis.

关键词： heterogeneous catalysis palladium single atom catalyst β-FeOOh nanorod coordination environment hydrogenation of cinnamaldehyde

Electron excitation processes in low energy collisions of hydrogen-helium atoms

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Chinese Physics B 2022年第12期31卷 213-218页

作者： Kun Wang Chuan Dong Yi-Zhi Qu Ling Liu Yong Wu Xu-hai hong Robert j.Buenker Institute of Environmental Science Shanxi UniversityTaiyuan 030006China College of Optoelectronics University of Chinese Academy of SciencesBeijing 100049China National Key Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing 100088China School of Physics and Electronic Technology Liaoning Normal UniversityDalian 116029China Fachbereich C-Mathematik und Naturwissenschaften Bergische Universitat WuppertalD-42097 WuppertalGermany

The electron excitation processes of h(1s)+he(1s^(2))→h(2s/2p)+he(1s^(2))are studied in impact energy range of 20-2000 e V/u by using the quantum-mechanical molecular orbital close-coupling(QMOCC)*** and state-selective cross sections have been obtained and compared with the available theoretical and experimental *** results agree well with available measurements in the overlapping energy regions *** comparison of our results with other theoretical calculations further demonstrates the importance of considering a sufficient number of *** datasets presented in this paper,including the excitation cross sections,are openly available at https://***/10.57760/sciencedb.j00113.00083.

关键词： electron excitation processes low energy collision quantum-mechanical molecular orbital close-coupling method cross section

胶质瘤:标准或高b值扩散加权MR成像表观扩散系数图的直方图分析——与肿瘤级别的相关性

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国际医学放射学杂志 2012年第1期 85-86页

作者： S.h.Choi Y.j.Kim K.G.Kim C.h.Sohn j.h.Kim 李斌 Department of Radiology Seoul National University College of Medicine28 Yongon-dongChongno-guSeoul 110-744Korea

目的基于整个肿瘤容积数据获得表观扩散系数(ADC)图的直方图,探索其在分析确定胶质瘤级别中的作用,评价标准b值(1000s/mm2)和高b值(3000s/mm2)ADC图的诊断性能。材料与方法此回顾性研究经机构审查委员会批准,无需知情同意。27例星形细... 详细信息

目的基于整个肿瘤容积数据获得表观扩散系数(ADC)图的直方图,探索其在分析确定胶质瘤级别中的作用,评价标准b值(1000s/mm2)和高b值(3000s/mm2)ADC图的诊断性能。材料与方法此回顾性研究经机构审查委员会批准,无需知情同意。27例星形细胞瘤病人进行了b值为

关键词：胶质瘤 ADC 肿瘤级别表观扩散系数直方图扩散加权 MR 相关性