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Dual-functional marigold-like Zn_(x)Cd_(1-x)S homojunction for selective glucose photoreforming with remarkable H_(2)coproduction

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Journal of Energy Chemistry 2023年第4期79卷 158-167页

作者： fuyan kang Cai Shi Yeling Zhu Malin Eqi Junming Shi Min Teng Zhanhua Huang Chuanling Si Feng Jiang Jinguang Hu Key Laboratory of Bio-based Material Science and Technology Ministry of EducationMaterial Science and Engineering CollegeNortheast Forestry UniversityHarbin 150040HeilongjiangChina Tianjin Key Laboratory of Pulp and Paper College of Light Industry and EngineeringTianjin University of Science and TechnologyTianjin 300457China Sustainable Functional Biomaterials Lab Department of Wood ScienceUniversity of British Columbia2424 Main MallVancouver V6T 1Z4Canada Department of Chemical and Petroleum Engineering University of Calgary2500 University DriveNWCalgaryAlberta T2N 1N4Canada

The global commitment to pivoting to sustainable energy and products calls for technology development to utilize solar energy for hydrogen(H_(2))and value-added chemicals production by biomass ***,a novel dual-functional marigold-like Zn_(x)Cd_(1-x)S homojunction has been the production of lactic acid with high-yield and H_(2)with high-efficiency by selective glucose *** optimized Zn_(0.3)Cd_(0.7)S exhibits outstanding H_(2)generation(13.64 mmol h^(-1)g^(-1)),glucose conversion(96.40%),and lactic acid yield(76.80%),over 272.80 and 19.21 times higher than that of bare ZnS(0.05 mmol h^(-1)g^(-1))and CdS(0.71 mmol h^(-1)g^(-1))in H_(2)generation,*** marigold-like morphology provides abundant active sites and sufficient substrates accessibility for the photocatalyst,while the specific role of the homojunction formed by hexagonal wurtzite(WZ)and cubic zinc blende(ZB)in photoreforming biomass has been demonstrated by density functional theory(DFT)*** is converted to lactic acid on the WZ surface of Zn_(0.3)Cd_(0.7)S via the photoactive species·O_(2)^(-),while the H_(2)is evolved from protons(H^(+))in H_(2)O on the ZB surface of Zn_(0.3)Cd_(0.7)*** work paves a promising road for the production of sustainable energy and products by integrating photocatalysis and biorefine.

关键词： Zn_(x)Cd_(1-x)S homojunction Selective glucose photoreforming Biomass valorization Sustainable H_(2) Photoreforming mechanism

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Research progress on rolling superlubricity in solid lubricants

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Science China(Technological Sciences) 2024年第7期67卷 1980-1990页

作者： LI PanPan LI HongXuan ZHU DongXiang ZHU YongQi kang fuyan WANG Wan ZHANG YaXin LIU XiaoHong JI Li ZHOU HuiDi CHEN JianMin State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemical Engineering Northwest Minzu UniversityLanzhou 730030China

Superlubricity is an ideal lubrication state where friction nearly vanishes between contact interfaces. It has become one of the most important research topics and approaches owing to its significance in reducing energy consumption and preventing device failures. As an efficient and universal lubricating principle capable of achieving superlubricity, rolling lubrication has attracted widespread attention in recent years. In this review, the theoretical concept of rolling lubrication and the experimental research progress of spherical/scroll structures are summarized. The review focuses on the possibility of achieving rolling lubrication using spherical/scroll structures(such as spherical fullerenes, carbon nanotubes, and formed and constructed spherical/scroll structures). The challenges in achieving rolling lubrication are summarized, and the possibility of molecular rolling lubrication,as well as its potential applications in superlubrication, are discussed.

关键词： spherical/scroll structure rolling lubrication superlubricity fullerene

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SmVO_4纳米粒子的制备及其可见光催化活性研究

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化工新型材料 2018年第12期46卷 81-84页

作者：付孝锦李子黎由耀辉康富彦李琴刘勇郑小刚内江师范学院化学化工学院内江641100

以硝酸钐[Sm(NO_3)_3·6H_2O]和钒酸钠(Na_3VO_4)为原料,采用直接沉淀法在三乙醇胺-丙三醇-乙醇混合有机溶剂体系中制备钒酸钐(SmVO_4)纳米粒子,考察其对罗丹明B的可见光催化降解活性,并对其进行表征。研究结果表明:浓度均为0.05mol/L的... 详细信息

以硝酸钐[Sm(NO_3)_3·6H_2O]和钒酸钠(Na_3VO_4)为原料,采用直接沉淀法在三乙醇胺-丙三醇-乙醇混合有机溶剂体系中制备钒酸钐(SmVO_4)纳米粒子,考察其对罗丹明B的可见光催化降解活性,并对其进行表征。研究结果表明:浓度均为0.05mol/L的Sm(NO_3)_3·6H_2O和Na_3VO_4溶液在三乙醇胺、丙三醇和乙醇体积配合比为1∶1∶3的溶液体系中反应3.0h获得分散性好、平均粒径约100nm、比表面积103.4m^2/g的SmVO4纳米粒子,SmVO_4纳米粒子对罗丹明B的降解率达到58.7%,具有较好的光催化活性。

关键词： SmVO4纳米粒子有机溶剂罗丹明B 光催化活性

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Spatial chaos-based image encryption design

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Science China(Physics,Mechanics & Astronomy) 2009年第2期52卷 177-183页

作者： LIU ShuTang SUN fuyan College of Control Science and Engineering Shandong UniversityJi’nan 250061China

In recent years, the chaos based cryptographic algorithms have suggested some new and efficient ways to develop secure image encryption techniques, but the drawbacks of small key space and weak security in one-dimensional chaotic cryptosystems are obvious. In this paper, permutation and sub- stitution methods are incorporated to present a stronger image encryption algorithm. Spatial chaotic maps are used to realize the position permutation, and to confuse the relationship between the ci- pher-image and the plain-image. The experimental results demonstrate that the suggested encryption scheme of image has the advantages of large key space and high security; moreover, the distribution of grey values of the encrypted image has a random-like behavior.

关键词： spatial chaos two-dimensional logistic map spatial bifurcation image encryption

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Experimental study on the simultaneous desulfurization and denitrification by duct injection

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Journal of Environmental Sciences 2004年第4期16卷 674-677页

作者： ZHAOYi fuyan-chun MAShuang-chen HUANGJian-jun SchoolofEnvironmentalScience＆Engineering NorthChinaElectricPowerUniversityBaoding071003China

The highly active absorbent with oxidization based on fly ash, lime and additive was prepared. Experiments of simultaneous desulfurization and denitrification were carried out using fixture bed and duct injection. The influencial factors for the absorptive capacity of the absorbent were studied. The absorptive capacities of 120.7 mg for SO 2 and 43.7 mg for NOx were achieved at a Ca/(S+N) molar ratio 1.2, respectively, corresponding removal efficiencies of 87% and 76%, while spent absorbent appeared in the form of dry powder. The optimal temperature and humidity of flue gas treated with this process were shown to be approximately 50℃, and 5% respectively. The mechanism of removal for SO 2 and NOx was investigated. In comparison with traditional dry FGD, this process appears to have lower cost, less complicated configuration and simpler disposal of used absorbent. The valuable references can be provided for industrial application by this process. The foreground of application will be vast in China and in the world.

关键词： simultaneous desulfurization and denitrification duct injection absorptive capacity

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Endosulfan residues and farmers’replacement behaviors of endosulfan in the north-west inland cotton region

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 35-47页

作者： Shuyan Zhou Yang Zhang Jingjing Wang Shikun Cheng fuyan Zhuo Yun Hong School of Energy and Environmental Engineering University of Science and Technology Beijing 100083China Foreign Environmental Cooperation Center Ministry of Ecology and Environment of the People’s Republic of ChinaBeijing 100035China United Nations Development Programme in China Beijing 100600China National Agro-Tech Extension and Service Center Beijing 100125China

We assessed the situation of endosulfan residues in cotton fields after the endosulfan ban came into effect and the current knowledge,attitude,and practice(KAP)of cotton farmers on the phase-out of endosulfan and the application of alternative *** samples(n=91)of cotton fields were collected from the major cotton-producing areas in China,namely the north-west inland cotton region,and the endosulfan residues were analyzed.A KAP survey was carried out for cotton farmers,and 291 questionnaires were *** influences of gender,age,education background,cotton planting years,publicity and training,income sources,and other factors on cotton farmers’KAP were *** results showed that endosulfan sulfate was the main endosulfan residue in the soil,followed byβ-endosulfan andα-endosulfan,the average residual contents were 0.569,0.139,and 0.060μg/kg,*** results of the KAP study showed that cotton farmers scored low on knowledge about the phase-out of endosulfan and the application of alternative technologies but high on attitude and *** number of family members,years of cotton planting,age,and the cottonplanting area had different degrees of influence on KAP *** training could significantly improve the KAP scores of cotton farmers;training should be more targeted and designed reasonably for key groups,such as men and the population under 30,followed by training them to use pesticides *** large-scale cotton growers,training should focus on green prevention and control technologies.

关键词： Cotton fields Endosulfan residues Farmers KAP survey Replacement behaviours

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Novel Early-Warning Model for Customer Churn of Credit Card Based on GSAIBAS-Cat Boost

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Computer Modeling in Engineering & Sciences 2023年第12期137卷 2715-2742页

作者： Yaling Xu Congjun Rao Xinping Xiao fuyan Hu School of Science Wuhan University of TechnologyWuhan430070China

As the banking industry gradually steps into the digital era of Bank 4.0,business competition is becoming increasingly fierce,and banks are also facing the problem of massive customer *** better maintain their customer resources,it is crucial for banks to accurately predict customers with a tendency to *** at the typical binary classification problem like customer churn,this paper establishes an early-warning model for credit card customer *** is a dual search algorithm named GSAIBAS by incorporating Golden Sine Algorithm(GSA)and an Improved Beetle Antennae Search(IBAS)is proposed to optimize the parameters of the CatBoost algorithm,which forms the GSAIBAS-CatBoost ***,considering that the BAS algorithm has simple parameters and is easy to fall into local optimum,the Sigmoid nonlinear convergence factor and the lane flight equation are introduced to adjust the fixed step size of *** this improved BAS algorithm with variable step size is fused with the GSA to form a GSAIBAS algorithm which can achieve dual ***,an empirical analysis is made according to the data set of credit card customers from Analyttica official *** empirical results show that the values of Area Under Curve(AUC)and recall of the proposedmodel in this paper reach 96.15%and 95.56%,respectively,which are significantly better than the other 9 common machine learning *** with several existing optimization algorithms,GSAIBAS algorithm has higher precision in the parameter optimization for *** with two other customer churn data sets on Kaggle data platform,it is further verified that the model proposed in this paper is also valid and feasible.

关键词： Customer churn early-warning model IBAS GSAIBAS-CatBoost

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Biology and pathology of the uterine micro environ merit and its natural killer cells

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Cellular & Molecular Immunology 2021年第9期18卷 2101-2113页

作者： fuyan Wang Anita Ellen Qualls Laia Marques-Fernandez Francesco Colucci Department of Obstetrics&Gynaecology University of CambridgeNational Institute for Health Research Cambridge Biomedical Research CentreCambridge CB20SWUK Department of Biochemistry and Molecular Biology and Zhejiang Key Laboratory of PathophysiologySchool of MedicineNingbo UniversityNingbo 315211China Centre for Trophoblast Research University of CambridgeCambridge CB23EGUK

Tissues are the new frontier of discoveries in *** of the immune system are an integral part of tissue physiology and *** how immune cells inhabit,housekeep,and defend gut,lung,brain,liver,uterus,and other organs helps revealing the intimate details of tissue physiology and may offer new therapeutic targets to treat *** uterine microenvironment modulates the development and function of innate lymphoid cells[ILC,largely represented by natural killer(NK)cells],macrophages,T cells,and dendritic *** immune cells,in turn,contribute to tissue *** by ovarian hormones,the human uterine mucosa(endometrium)undergoes ~400 monthly cycles of breakdown and regeneration from menarche to menopause,with its fibroblasts,glands,blood vessels,and immune cells remodeling the tissue into the transient *** more transformative changes occur upon blastocyst *** the placenta is formed,the endometrial glands feed the embryo by histiotrophic nutrition while the uterine spiral arteries are stripped of their endothelial layer and smooth muscle *** arterial remodeling is carried out by invading fetal trophoblast and maternal immune cells,chiefly uterine NK(uNK)cells,which also assist fetal *** tran sformed arteries no Ion ger resp ond to mater nal stimuli and meet the increasi ng dema nds of the growing *** review focuses on how the everchanging uterine microenvironment affects uNK cells and how uNK cells regulate homeostasis of the decidua,placenta development,and fetal *** these pathways will help understand the causes of major pregnancy complications.

关键词： Natural killer cells Uterine microenvironment Pregnancy Decidua uNK

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Effects of the physical and chemical properties of petroleum coke on its slurryability

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Petroleum Science 2012年第2期9卷 251-256页

作者： Gao fuyan Liu Jianzhong Wang Chuancheng Zhou Junhu Cen Kefa State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhouZhejiang 310027China Ningbo Institute of Technology Zhejiang UniversityNingboZhejiang 315100China

In this study, the effects of particle size distribution （PSD）, chemical composition and pore structure of petroleum coke on the slurryability of petroleum coke water slurry （PCWS） were investigated. Four petroleum cokes were studied, and they showed completely different slurryability. The solid concentration at fixed viscosity （i.e. apparent viscosity of 1000 mPa）（SCFV） of four PCWSs is different from each other, with the highest value of 70.9%, and lowest of 62.1%. The apparent viscosity of the four PCWSs all increased with an increase of the solid concentration. The results showed that the PSD, inherent moisture content, specific surface area and pore volume of petroleum coke were key factors to affect the slurryability. The slurryability was enhanced with increasing PSD range and particle packing fraction, and with decreasing inherent moisture content, specific surface area and pore volume.

关键词： Petroleum coke petroleum coke water slurry slurryability particle size distribution pore structure

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Surface defect detection competition with a bio-inspired vision sensor

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National Science Review 2023年第6期10卷 31-34页

作者： Anjing Guo Jupo Ma Renwei Dian fuyan Ma Jinjian Wu Shutao Li School of Robotics Hunan University School of Artificial Intelligence Xidian University Pazhou Laboratory (Huangpu) College of Electrical and Information Engineering Hunan University Key Laboratory of Visual Perception and Artificial Intelligence of Hunan Province

INTRODUCTION Surface defects are inevitable during the product manufacturing process,such as impurities,scratches and dirt.D efects not only reduce the aesthetics and comfort of products,but may also degrade the functional *** are very concerned about inadequate defect detection because of potential economic and reputation ***,it is significant to study automatic defect detection *** machine vision-based defect detection mostly adopts a traditional CCD or CMOS vision sensor (VS) for ***,in real-world production lines,due to dynamic environments,traditional VS encounters difficulties in meeting the demands of defect detection,especially in modern high-precision product manufacturing.

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