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Secure and Efficient Mutual Authentication Scheme for NFC Mobile Devices

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Journal of Electronic Science and Technology 2017年第3期15卷 240-245页

作者： you-han Tung Wen-Shenq Juang Department of Information Management National Kaohsiung First University of Science and Technology Kaohsiung 824

As the technology of mobile devices spreads fast,the price of mobile devices is getting *** of the people have mobile devices,and these devices have the technology of near field communication（NFC）.With the long time development and research,the mobile devices use NFC technology on the payment and authentication applications,and replace the smartcard,the access control card,and the credit card by using the card emulation *** helps the development of NFC *** recent years,more and more users begin using NFC technology on mobile payment and *** researches have proposed the related NFC authentication protocols,but their schemes are still lack of some security properties and functions,which are necessary for NFC authentication *** this paper,we propose a secure and efficient NFC authentication scheme between two NFC devices by the help of the authentication server that provides mutual authentication.

关键词： Index Terms--Authentication protocol informationsecurity mutual authentication near fieldcommunication (NFC)

Circular Polarization in Pulsar Integrated Profiles: Updates

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Chinese Journal of Astronomy and Astrophysics 2006年第2期6卷 237-246页

作者： Xiao-Peng you Jin-lin han National Astronomical Observatories Chinese Academy of Sciences Beijing 100012

We update the systematic studies of circular polarization in integrated pulse profiles by han et al. Data of circular polarization profiles are compiled. Sense reversals can occur in core or cone components, or near the intersection between components. The correlation between the sense of circular polarization and the sense of position angle variation for conal-double pulsars is confirmed with a much large database. Circular polarization of some pulsars has clear changes with frequency. Circular polarization of millisecond pulsars is marginally different from that of normal pulsars.

关键词： polarization - pulsars: general

Chemical reactions of oily sludge catalyzed by iron oxide under supercritical water gasification condition

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Frontiers of Chemical Science and Engineering 2022年第6期16卷 886-896页

作者： Houjun Zhang Fang Chen Jipeng Xu Jinli Zhang you han School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin UniversityTianjin 300072China

Supercritical water gasification is a promising technology in dealing with the degradation of hazardous waste,such as oily sludge,accompanied by the production of fuel *** evaluate the mechanism of Fe_(2)O_(3) catalyst and the migration pathways of heteroatoms and to investigate the systems during the process,reactive force field molecular dynamics simulations are *** terms of the catalytic mechanisms of Fe_(2)O_(3),the surface lattice oxygen is consumed by small carbon fragments to produce CO and CO_(2),improving the catalytic performance of the cluster due to more unsaturated coordination Fe sites *** oxygen combines with*H radicals to form water molecules,improving the catalytic ***,the pathway of asphaltene degradation was revealed at an atomic level,as well as ***,the adsorption of hydroxyl radical on the S atom caused breakage of the two C-S bonds in turn,forming·HSO intermediate,so that the organic S element was fixed into the inorganic liquid *** heteroatom O was removed under the effects of supercritical *** metal particles presented in the oily sludge,such as iron in association with Fe_(2)O_(3) catalyst,helped accelerate the degradation of asphaltenes.

关键词： oily sludge SCWG ReaxFF Fe_(2)O_(3) heteroatoms

Non-isothermal kinetics and characteristics of calcium carbide nitridation reaction with calcium-based additives

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Frontiers of Chemical Science and Engineering 2024年第4期18卷 49-61页

作者： Zhihan Zhang Mengxiao Yu Xiaoyu Zhang Jinli Zhang you han School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

The nitridation reaction of calcium carbide and N_(2) at high temperatures is the key step in the production of ***,the challenges faced by this process,such as high energy consumption and poor product quality,are mainly attributed to the lack of profound understanding of the *** study aimed to improve this process by investigating the non-isothermal kinetics and reaction characteristics of calcium carbide nitridation reaction at different heating rates(10,15,20,and 30℃·min^(-1))using thermogravimetric *** kinetic equation for the nitridation reaction of additive-free calcium carbide sample was obtained by combining model-free methods and model-fitting *** effect of different calcium-based additives(CaCl_(2) and CaF_(2))on the reaction was also *** results showed that the calcium-based additives significantly reduced reaction temperature and activation energy E_(a) by about 40% with CaF_(2) and by 55%-60% with CaCl_(2).The reaction model f(α)was also changed from contracting volume(R3)to 3-D diffusion models with D3 for CaCl_(2) and D4 for CaF_(2).This study provides valuable information on the mechanism and kinetics of calcium carbide nitridation reaction and new insights into the improvement of the lime-nitrogen process using calcium-based additives.

关键词： lime-nitrogen calcium carbide calciumbased additive thermogravimetric analysis nonisothermal kinetics

Lipschitz continuity of the optimal value function and KKT solution set in indefinite quadratic programs

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Applied Mathematics(A Journal of Chinese Universities) 2015年第1期30卷 102-110页

作者： han you-pan CHEN Zhi-ping ZhanG Feng School of Science Xi’an Polytechnic University Department of Computing Science School of Mathematics and Statistics Xi’an Jiaotong University

When all the involved data in indefinite quadratic programs change simultaneously, we show the locally Lipschtiz continuity of the KKT set of the quadratic programming problem firstly, then we establish the locally Lipschtiz continuity of the KKT solution set. Finally, the similar conclusion for the corresponding optimal value function is obtained.

关键词： quadratic program Lipschitz continuity value function feasible solution KKT solution set.

Special issue on “Green chemical process and intensification”

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Frontiers of Chemical Science and Engineering 2022年第11期16卷 1533-1535页

作者： you han Xiang Ma Lin-Bing Sun Jianhong Xu School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Material(SICAM)College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China The State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

In order to better unite and lead young chemical engineering scholars,the Chemical Industry and Engineering Society of China will establish youth Working *** the time of the establishment of youth Working Committee,we were invited as guest editors to organize the special issue of Frontiers of Chemical Science and Engineering on green chemical process and intensification,aiming to inspire the innovative ideas and build an energetic and academic communication platform for young scholars.

关键词： intensification process chemical

Synthesis and Crystal Structure of Bisaqua-[N,N'-bis(3,5-dichlorosalicylidene)-1,3-diaminopropano]zinc(II)

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1043-1046页

作者： you Zhong-Lu han Xiao WANG Jia CHI Jing-Yun Department of Chemistry and Chemical Engineering Liaoning Normal University Dalian 116029 China

The title mononuclear zinc（Ⅱ） complex [Zn（BCDP）（H2O）2] （BCDP = N,N＇-bis（3,5dichlorosalicylidene）-1,3-diaminopropane） was prepared and characterized by elemental analysis, 1R spectra and single-crystal X-ray diffraction. The crystal belongs to the orthorhombic system, space group Pnma with a = 7.887（1）, b = 23.788（2）, c = 10.295（4） A, Z= 4, V= 1931.5（8） ,A^3, Dc = 1.786 g/cm^3, Mr = 519.49, λ（MoKa） = 0.71073 A, μ = 1.853 mm^-1, F（000） = 1048, R = 0.0464 and wR = 0.0918. A total of 2273 unique reflections were collected, of which 1570 with 1 〉 2σ（I） were observed. The molecule of the complex has crystallographic mirror symmetry. The Zn atom is sixcoordinated in an octahedral geometry. In the crystal, the molecules are linked through intermolecular O-H…O and O-H…Cl hydrogen bonds, forming chains running along the a axis.

关键词： Schiff base zinc crystal structure hydrogen bond

Mechanistic understanding of Cu-based bimetallic catalysts

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Frontiers of Chemical Science and Engineering 2020年第5期14卷 689-748页

作者： you han Yulian Wang Tengzhou Ma Wei Li Jinli Zhang Minhua Zhang School of Chemical Enginering and Technology Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin UniversityTianjin 300072China School of Chemistry and Chemical Engineering Shihezi UniversityShihezi 832003China Key Laboratory for Green Chemical Technology of Ministry of Education Research and Development Center for Petrochemical TechnologyTianjin UniversityTianjin 300072China

Copper has received extensive attention in the field of catalysis due to its rich natural reserves,low cost,and superior catalytic ***,we reviewed two modification mechanisms of co-catalyst on the coordination environment change of Cu-based catalysts:(1)change the electronic orbitals and geometric structure of Cu without any catalytic functions;(2)act as an additional active site with a certain catalytic function,as well as their catalytic mechanism in major reactions,including the hydrogenation to alcohols,dehydrogenation of alcohols,water gas shift reaction,reduction of nitrogenous compounds,electrocatalysis and *** influencing mechanisms of different types of auxiliary metals on the structure-activity relationship of Cu-based catalysts in these reactions were especially summarized and *** mechanistic understanding can provide significant guidance for the design and controllable synthesis of novel Cu-based catalysts used in many industrial reactions.

关键词： copper bimetallic catalyst coordination modification mechanism catalytic application

Effect of Ce addition on microstructures and mechanical properties of A380 aluminum alloy prepared by squeeze-casting

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International Journal of Minerals,Metallurgy and Materials 2018年第5期25卷 554-563页

作者： Xiao-hui Ao Shu-ming Xing Bai-shui Yu Qing-you han School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Department of Mechanical Engineering Technology Purdue University

The effect of cerium(Ce)addition on the eutectic Si,β-Al_5Fe Si phase,and the tensile properties of A380 alloy specimens prepared by squeeze-casting were studied by optical microscopy(OM),scanning electron microscopy(SEM),and X-ray diffraction(XRD).The experimental results showed that Ce more effectively modified the eutectic Si and refined theβ-Al_5Fe *** refinement effect significantly increased under a specific pressure of 100 MPa with the addition of Ce from 0.1wt%to 0.9wt%.In contrast,the average length and the aspect ratio of the eutectic Si andβ-Al_5Fe Si exhibited their optimal values when the content of the added Ce was greater than 0.5wt%.Needle-like Al_8Cu_4Ce was precipitated with the addition of excessive Ce;hence,the mechanical properties of A380 gradually decreased with increasing Ce content in the range from 0.3wt%to 0.9wt%.

关键词： cerium eutectic Si Fe-rich phases squeeze-casting mechanical properties