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Eco-friendly polysaccharide coatings for antifouling and dragreduction and potential application for marine devices

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Friction 2024年第4期12卷 726-744页

作者： Hao YANG Liguo QIN Wenhui ZHAO Fagla Jules MAWIGNON Hui GUO Yongkang wu Yali zhang Guangneng DONG Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Institute of Design Science and Basic ComponentsSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Biomedical Information of Ministry of Education School of Life Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Department of Endocrinology First Affiliated Hospital of Medical CollegeXi'an Jiaotong UniversityXi’an 710061China

Traditional antifouling agents usually have a certain toxic effect on marine environments and non-target *** this study,Dictyophora indusiata polysaccharide(DIP)was applied as a natural antifouling surface modifier to prepare the surface coating for marine *** DIP coatings were prepared:*** spore polysaccharide(DISP),*** volva polysaccharide(DIVP),and *** embryonic body polysaccharide(DIEP).The antifouling,tribological,and anticorrosion behavior of the coatings were *** revealed that the three kinds of DIP coatings had excellent antifouling properties,which could effectively prevent the adhesion of Chlorella and the attachment of water-based and oily stains on the ***,the coatings showed great mechanical stability and could maintain an extremely low coefficient of friction(COF<0.05)after continuous *** drag reduction rate of the coated surfaces reached 5%,showing a powerful lubrication ***,the DIP coatings presented an outstanding corrosion resistance,where the equivalent circuit impedances were 4-9 orders of magnitude higher than the control *** research showed a promising prospect of surface coating fabrication with DIP for marine devices to achieve the purpose of antifouling and drag reduction.

关键词： Dictyophora indusiata polysaccharide(DIP)coating antifouling anticorrosion lubrication and drag reduction

Biomass-derived porous carbon with single-atomic cobalt toward high-performance aqueous zinc-sulfur batteries at room temperature

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Journal of Energy Chemistry 2024年第8期95卷 325-335,I0008页

作者： Shenfei Zhao xiaoshuai wu Jiliang {2. Chunjie Li Zixiang Cui Weihua Hu Ruguang Ma Changming Li Institute for Clean Energy&Advanced Materials School of Materials&EnergySouthwest UniversityChongqing 400715China Institute for Materials science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009JiangsuChina school of Materials science and Engineering Dalian Jiaotong UniversityDalian 116028LiaoningChina

Aqueous zinc-sulfur batteries at room temperature hold great potential for next-generation energy storage technology due to their low cost,safety and high energy ***,slow reaction kinetics and high activation energy at the sulfur cathode pose great challenges for the practical ***,biomass-derived carbon with single-atomic cobalt sites(MMPC-Co)is synthesized as the cathode in Zn-S *** catalysis of single-atom Co sites greatly promotes the transform of cathode electrolyte interface(CEI)on the cathode surface,while offering accelerated charge transfer rate for high conversion reversibility and large electrochemical surface area(ECSA)for high electrocatalytic ***,the rich pore structure not only physically limits sulfur loss,but also accelerates the transport of zinc *** addition,the large pore volume of MMPC-Co is able to relieve the stress effect caused by the volume expansion of Zn S during charge/discharge cycles,thereby maintaining the stability of electrode ***,the sulfur cathode maintains a high specific capacity of 72..96 m A h g^(-1)after 500 cycles at4 A g^(-1),which is much better than most cathode materials reported in the *** work provides new insights into the design and development of room-temperature aqueous Zn-S batteries.

关键词： Biomass-derived carbon Single-atom catalysts Rich pore structure Sulfur cathode Aqueous zinc-sulfur batteries

Elaborations of the influencing factors on the formation of secondary inorganic aerosols in a heavily polluted urban area of china

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Journal of Environmental sciences 2024年第4期138卷 406-417页

作者： Shuang Wang Qiyuan Wang Ting zhang Suixin Liu Steven Sai Hang Ho Jie Tian Hui Su Yong zhang Luyao Wang Tingting wu Junji Cao school of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Aerosol Chemistry and Physics State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China CAS Center for Excellence in Quaternary science and Global Change Xi’an 710061China National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain Xi’an 710061China Division of Atmospheric sciences Desert Research InstituteRenoNevada89512United States Hong Kong Premium Services and Research Laboratory KowloonHong Kong SARChina xi’an Institute for Innovative Earth Environment Research Xi’an 710061China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China

In this study,online water-soluble inorganic ions were detected to deduce the formation mechanism of secondary inorganic aerosol in xianyang,china during *** dominant inorganic ions of sulfate(SO_(4)^(2.)),nitrate(NO_(3)^(-)),and ammonium(NH_(4)^(+))(the sum of those is abbreviated as SNA)accounted for 17%,2.%,and 12. of PM_(2.5)mass,*** the air quality deteriorated from excellent to poor grades,the precursor gas sulfur dioxide(SO_(2.)of SO_(4)^(2.)increased and then decreased with a fluctuation,while nitrogen dioxide(NO_(2.)and ammonia(NH_(3)),precursors of NO_(3)^(-)and NH_(4)^(+),and SNA show increasing *** factors including boundary layer height(BLH),temperature,and wind speed also show decline trends,except relative humidity(RH).Meanwhile,the secondary conversion ratio shows a remarkable increasing trend,indicating that there was a strong secondary *** the perspective of chemical mechanisms,RH is positively correlated with sulfur oxidation ratios(SOR),nitrogen oxidation ratios(NOR),and ammonia conversion ratios,representing that the increase of humidity could promote the generation of ***,SOR and NOR were also positively related to the *** the one hand,the low wind speed and BLH led to the accumulation of *** the other hand,the increases of RH and ammonia promoted more formations of SNA and PM_(2.5).The results advance our identification of the contributors to the haze episodes and assist to establish more efficient emission controls in xianyang,in addition to other cities with similar emission and geographical characteristics.

关键词： Haze episodes Secondary inorganic aerosol Secondary conversion ratio Meteorological factors

Fixed Subgroups are not Compressed in Direct Products of Surface Groups

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Chinese Annals of Mathematics,Series B 2024年第5期45卷 703-708页

作者： Qiang zhang Jianchun wu Fanling GU school of Mathematics and Statistics Xi'an Jiaotong University Department of Mathematics Soochow University school of Mathematics and Statistics Xi'an Jiaotong University school of General Education Guangzhou College of Technology and Business

By constructing counterexamples, the authors show that the fixed subgroups are not compressed in direct products of free and surface groups, and hence negate a conjecture in [zhang, Q., Ventura, E. and J. wu, Fixed su... 详细信息

关键词： 2.F34 2.F65 57M07 Compression Direct product Fixed subgroup Free group Inertia Surface group

PIV适用于两相流稀相微粒速度场测量的算法探讨

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水动力学研究与进展（A辑） 2004年第4期19卷 547-551页

作者：宫武旗张义云姜华毛靖儒西安交通大学能源与动力工程学院西安710049 西安科技学院能源系西安710049

　用PIV(ParticleImageVelocimetry)技术测量两相流中稀相微粒速度场时,稀相微粒起着示踪粒子的作用,其浓度低,粒子图像离散性强,需要发展跟踪单个粒子图像的算法才能确定粒子的速度矢量。本文介绍了基于BICC(BinaryImageCross-Correlat... 详细信息

　用PIV(ParticleImageVelocimetry)技术测量两相流中稀相微粒速度场时,稀相微粒起着示踪粒子的作用,其浓度低,粒子图像离散性强,需要发展跟踪单个粒子图像的算法才能确定粒子的速度矢量。本文介绍了基于BICC(BinaryImageCross-Correlationalgorithm)算法的PIV粒子图像跟踪技术,用数值模拟的方法对几个典型的粒子图像场进行了粒子对的识别,并且对该算法模式中粒子对数、粒子半径等问题作了讨论。最后用所述方法对直管道中玻璃球-空气两相流50微米玻璃球粒子图像进行了实例分析,结果令人满意。

关键词： PIV 粒子对识别两相流

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基于混合式八叉树模型的数控加工几何仿真

系统仿真学报 2004年第4期16卷 733-735页

作者：吴宏杜建铭贠敏河南科技大学机电工程学院洛阳471004 西安交通大学机械工程学院西安710049

将混合式八叉树数据结构引入数控加工的几何仿真算法,并在简单的层次数据结构基础上加入了曲面的边界信息;叙述了从零件实体的CSG模型或B-Rep模型转换为相应的混合式八叉树数据结构过程中采用的方法,且在这一混合式八叉树模型的基础之... 详细信息

将混合式八叉树数据结构引入数控加工的几何仿真算法,并在简单的层次数据结构基础上加入了曲面的边界信息;叙述了从零件实体的CSG模型或B-Rep模型转换为相应的混合式八叉树数据结构过程中采用的方法,且在这一混合式八叉树模型的基础之上完成了仿真过程;最后通过一个零件数控加工几何仿真实例验证了所提出的算法的可行性和有效性。

关键词：几何仿真数控混合式八叉树模型数据结构

The effects of Fumaderm~ on immunological function and cytokines in a rat model of adjuvant-induced arthritis

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Journal of Pharmaceutical Analysis 2010年第1期22卷 44-50页

作者： Dian-Zeng zhang1,Hong-Ying Wang2.Feng Zhao1,Feng wu1 1.The Center for Biomedical Research,Key Laboratory of Environment & Disease Related to Genes,Ministry of Education of{2.,Medical school of xi’an jiaotong University,xi’an 710061 2.Department of Pharmaceutical science,Medical school of xi’an jiaotong University,xi’an 710061,{12..

Objective To study the therapeutic effect of Fumaderm in Freund’s complete adjuvant-induced arthritis(AIA)in Spraque-Dawley *** Adjuvant-induced arthritis(AIA)was established by intradermal injection of 0.1 mL of Freund’s complete adjuvant(CFA)in the palmar surface of the right hindpaw and Fumaderm was delivered by oral gavage for 2. *** CFA injection,the edema of the hindpaw was determined every two *** 2. days after CFA injection,the lymphocyte subsets of peripheral blood and the cytokines were determined by flow cytometry,meanwhile the histopathological examination of ankle-joints of the animals was *** Fumaderm had a significant therapeutic effect on *** hindpaw swelling was reduced significantly in a dose-dependent *** ratio of peripheral blood T lymphocytes was improved *** cytokine analysis from peripheral blood CD4+ T cells showed a decrease of proinflammatory cytokines and an increase of anti-inflammatory cytokines in Fumaderm treated animals.A strongly reduced inflammatory response in the joint synovium was *** Fumaderm has potential anti-inflammatory effects on AIA *** investigation is needed to elucidate the molecular mechanism involved in the clinical effect observed in the AIA model.

关键词： fumaric acid esters adjuvant-induced arthritis cytokine immunomodulator

Cooperative structure of Li/Ni mixing and stacking faults for achieving high-capacity Co-free Li-rich oxides

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Journal of Energy Chemistry 2024年第8期95卷 315-324,I0007页

作者： Zhen wu Yu-Han zhang Hao Wang Zewen Liu Xudong zhang xin Dai Kunyang Zou xiaoming Lou Xuechen Hu Lijing Ma Yan Liu Yongning Liu State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101ShandongChina Hefei Advanced Computing Center Operation Management Corp Ltd Hefei 230088AnhuiChina Center for High Performance Computing Network Information CenterXi’an Jiaotong UniversityXi’an 710049ShaanxiChina wuhan Dongfeng Motor Corporation Ltd Wuhan 430056HubeiChina school of Materials science and Intelligent Engineering Nanjing UniversitySuzhou 215163JiangsuChina Key Laboratory of MEMS of the Ministry of Education Southeast UniversityNanjing 210096JiangsuChina International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Co-free Li-rich layered oxides(LLOs)are emerging as promising cathode materials for Li-ion batteries due to their low cost and high ***,they commonly face severe structural instability and poor electrochemical activity,leading to diminished capacity and voltage ***,we introduce a Co-free LLO,Li_(1.167)Ni_(0.2.2.Mn_(0.611)O_(2.(Cf-L1),which features a cooperative structure of Li/Ni mixing and stacking *** structure regulates the crystal and electronic structures,resulting in a higher discharge capacity of 300.6 mA h g^(-1)and enhanced rate capability compared to the typical Co-free LLO,Li_(1.2.Ni_(0.2.Mn_(0.6)O_(2.(Cf-Ls).Density functional theory(DFT)indicates that Li/Ni mixing in LLOs leads to increased Li-O-Li configurations and higher anionic redox activities,while stacking faults further optimize the electronic interactions of transition metal(TM)3d and non-bonding O 2. ***,stacking faults accommodate lattice strain,improving electrochemical reversibility during charge/discharge cycles,as demonstrated by the in situ XRD of Cf-L1 showing less lattice evolution than *** study offers a structured approach to developing Co-free LLOs with enhanced capacity,voltage,rate capability,and cyclability,significantly impacting the advancement of the next-generation Li-ion batteries.

关键词： Co-free Li-rich oxides Li/Ni mixing Stacking faults Electronic structure

A policy-based automated negotiation for privileges in grid environments

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Journal of Pharmaceutical Analysis 2009年第1期21卷 11-16页

作者： Run-lian zhang1,2. xiao-nian {2.2.3, xiao-she Dong11.school of Electronic & Information Engineering, xi’an jiaotong University, xi’an 710049, china 2.school of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, china 3.National Laboratory for Modern Communications, Chengdu 610041, china. school of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China school of Information anf Communication Guilin University of Electronic Technology Guilin 541004 China National Laboratory of Modern Communications Chengdu 610041 China

To maintain the global consistency of the authorizing is a challenge when the system authorization is changed in grid environments. This paper proposes a policy-based automatically negotiating method to deal with this issue. An effective system framework, which includes the certificate management, the access policy repertory, the negotiator and the automatically negotiating mechanism, is designed and implemented. The experimental results show that automated negotiation can quickly regain the global authorization consistency and only cause a little system overhead increasing. Compared with the manual authorization maintaining, the presented method can reduce the negotiating time significantly, and reduce the meaningless grid jobs because the inconsistent privileges are controlled timely.

关键词： grid security authorization policy negotiation