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Cu single-atom electrocatalyst on nitrogen-containing graphdiyne for CO_(2)electroreduction to CH4

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Chinese Journal of Catalysis 2024年第9期64卷 123-132页

作者： Hao Dai Tao Song Xian Yue Shuting Wei Fuzhi Li Yanchao Xu Siyan Shu Ziang Cui Cheng Wang Jun Gu Lele Duan Department of Chemistry Southern University of Science and TechnologyShenzhen 518055GuangdongChina Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry School of ScienceWestlake UniversityHangzhou 310030ZhejiangChina Department of Chemistry Tsinghua UniversityBeijing 100084China Division of Solar Energy Conversion and Catalysis at Westlake University Zhejiang Baima Lake Laboratory Co.LtdHangzhou 310000ZhejiangChina Institute of Natural sciences Westlake Institute for Advanced StudyHangzhou 310024ZhejiangChina

Developing Cu single-atom catalysts(SACs)with well-defined active sites is highly desirable for producing CH4 in the electrochemical CO_(2)reduction reaction and understanding the structure-property ***,a new graphdiyne analogue with uniformly distributed N2-bidentate(note that N2-bidentate site=N^N-bidentate site;N2¹dinitrogen gas in this work)sites are *** to the strong interaction between Cu and the N2-bidentate site,a Cu SAC with isolated undercoordinated Cu-N2 sites(Cu1.0/N2-GDY)is obtained,with the Cu loading of 1.0 wt%.Cu1.0/N2-GDY exhibits the highest Faradaic efficiency(FE)of 80.6%for CH4 in electrocatalytic reduction of CO_(2)at-0.96 V ***,and the partial current density of CH4 is 1.0 mA cm^(-2).The selectivity for CH4 is maintained above 70%when the total current density is 1.0 to 300 mA cm^(-2).More remarkably,the Cu1.0/N2-GDY achieves a mass activity of 53.2 A/mgCu toward CH4 under-1.1. V *** situ electrochemical spectroscopic studies reveal that undercoordinated Cu-N2 sites are more favorable in generating key*COOH and*CHO intermediate than Cu nanoparticle *** work provides an effective pathway to produce SACs with undercoordinated Metal-N2 sites toward efficient electrocatalysis.

关键词： Carbon dioxide reduction Electrocatalysis Cu single-atom catalyst N-containing graphdiyne Methane

Privacy-Preserving Decision Protocols Based on Quantum Oblivious Key Distribution

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Computers, Materials & Continua 2020年第9期64卷 1915-1928页

作者： Kejia Zhang Chunguang Ma Zhiwei Sun Xue Zhang Baomin Zhou Yukun Wang school of Computer {1. and technology Harbin Engineering UniversityHarbin150001China school of {1. science Heilongjiang UniversityHarbin150080China State Key Laboratory of Networking and Switching technology Beijing University of Posts and TelecommunicationsBeijing100876China Center for Quantum computing Peng Cheng LaboratoryShenzhen518055China College of Computer science and Engineering Shandong University of Science and TechnologyQingdao266590China school of Artificial Intelligence Shenzhen PolytechnicShenzhen518055China Department of Electrical and Computer Engineering National University of Singapore117583Singapore

Oblivious key transfer(OKT)is a fundamental problem in the field of secure multi-party *** makes the provider send a secret key sequence to the user obliviously,i.e.,the user may only get almost one bit key in the sequence which is unknown to the ***,a number of works have sought to establish the corresponding quantum oblivious key transfer model and rename it as quantum oblivious key distribution(QOKD)from the well-known expression of quantum key distribution(QKD).In this paper,a new QOKD model is firstly proposed for the provider and user with limited quantum capabilities,where both of them just perform computational basis measurement for single *** we show that the privacy for both of them can be protected,since the probability of getting other’s raw-key bits without being detected is exponentially ***,we give the solutions to some special decision problems such as set-member decision and point-inclusion by announcing the improved shifting strategies followed ***,the further discussions and applications of our ideas have been presented.

关键词： Quantum cryptography quantum computing privacy-preserving quantum oblivious key distribution set-member decision point-inclusion decision

Eigenfunction expansion method and its application to two-dimensional elasticity problems based on stress formulation

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Applied Mathematics and Mechanics(English Edition) 2010年第8期31卷 1039-1048页

作者：黄俊杰阿拉坦仓王华 school of {1. sciences Inner Mongolia University College of sciences Inner Mongolia University of Technology

This paper proposes an eigenfunction expansion method to solve twodimensional （2D） elasticity problems based on stress formulation. By introducing appropriate state functions, the fundamental system of partial differential equations of the above 2D problems is rewritten as an upper triangular differential system. For the associated operator matrix, the existence and the completeness of two normed orthogonal eigenfunction systems in some space are obtained, which belong to the two block operators arising in the operator matrix. Moreover, the general solution to the above 2D problem is given by the eigenfunction expansion method.

关键词： eigenfunction expansion method two-dimensional (2D) elasticity problem upper triangular differential system general solution

Compressive deformation behavior of an indirect-extruded Mg-8Sn-1.l-1.n alloy

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International Journal of Minerals,Metallurgy and Materials 2013年第1期20卷 49-56页

作者： Wei-li Cheng Zhong-ping Que Jin-shan Zhang Chun-xiang Xu Wei Liang Bong Sun You Sung Soo Park school of Materials {1. and Engineering Taiyuan University of Technology Korea Institute of Materials science Ulsan National Institute of science and {1.

The medium and warm deformation behaviors of an indirect-extruded Mg-8Sn-IAI-IZn alloy were investigated by compression tests at temperatures between 298 and 523 K and strain rates of 0.001.1. s-1. It was found that the twinning-slip transition temperature was strain rate dependent, and all the true stress-true strain curves could be divided into two groups： concave and convex curves. Associated microstructural investigations indicated that the dynamic recrystallization （DRX） be- havior of the alloy varied with deformation conditions. At high strain rate and low temperature, dynamically recrystallized grains preferentially nucleated and developed in the twinned regions, indicating that twinning-induced DRX was dominant. While, at low strain rate, DRX developed extensively at grain boundaries and twins, and the process of twinning contributed to both oriented nucleation and selective growth. For the studied alloy, cracks mainly initiated from the shear band and twinning lamellar over the ranges of temperature and strain rate currently applied.

关键词： magnesium alloys compression testing dynamic recrystallization microstructure

Mechanism and characteristics of thermal action of HMX explosive mixture containing high-efficiency fuel

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science China(Technological sciences) 2019年第4期62卷 578-586页

作者： LIU JiPing YANG WeiWei LIU Ying LIU XiaoBo school of Materials {1. & Engineering Beijing Institute of Technology State Key Laboratory of Explosion science and {1. Beijing Institute of Technology

In this study, the thermal stability and detonation properties of three types of explosives were investigated. Results indicated that nanoaluminum powder improved the detonation properties of HMX by increasing the specific surface area of HMX, which substantially increased the explosion heat and power. The decomposition temperatures of the three explosives containing aluminum hydride, ammonia borane, and nanoaluminum powder during slow cook-off at heating rates of 1.5 and 1.°C min–1.were measured as 246°C and 241.C, 256°C and 261.C, and 238°C and 264°C, respectively. The explosives containing hydrogen storage materials swelled; however, the nanoaluminum powder was only slightly peeled off at the edge of the grains during cookoff. Differential scanning calorimetry(DSC) curves of the explosives containing hydrogen storage materials exhibited endothermic and exothermic peaks before the major exothermic reaction peak during the cook-off tests. In contrast, only one weak peak was observed in the DSC curve of the explosive containing nanoaluminum powder before the major exothermic reaction. In addition, the additives and adhesives catalyzed the slow cook-off decomposition, which caused the transformation of HMX crystals and accelerated the thermal decomposition reaction of HMX. The addition of high-density hydrogen storage materials to HMX resulted in detonation heats and explosion powers much greater than cure HMX. This improved performance was attributed to the hydrogen storage materials in the explosives participating in a secondary reaction in the reaction zone at the instant of the explosion, effectively realizing complementary lossless energy and thus greatly improving the explosive power of the explosives.

关键词： high-density hydrogen storage material nanoparticles thermal stability cook-off explosive performance detonation reaction

AGENT-BASED SIMULATION FOR KANSEI ENGINEERING： TESTING A FUZZY LINEAR QUANTIFICATION METHOD IN AN ARTIFICIAL WORLD

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Journal of Systems science and Systems Engineering 2007年第3期16卷 308-322页

作者： Tieju MA Yoshiteru NAKAMORI school of Knowledge {1. Japan Advanced Institute of Science and Technology 1-1 Asahidai Tatsunokuchi lshikawa 923-1292 Japan International Institute for Applied Systems Analysis A-2361.Laxenburg Austria

This paper argues that agent-based simulation can be used as a way for testing Kansei Engineering methods which deal with the human reaction from sensory to mental state, that is, sensitivity, sense, sensibility, feeling, esthetics, emotion affection and intuition. A new fuzzy linear quantification method is tested in an artificial world by agent-based modeling and simulations, and the performance of the fuzzy linear method is compared with that of a genetic algorithm. The simulations can expand people＇s imagination and enhance people＇s intuition that the new fuzzy linear quantification method is effective.

关键词： Agent-based simulation Kansei Engineering

Implementing termination analysis on quantum programming

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science China(Information sciences) 2019年第12期62卷 215-222页

作者： Shusen LIU Kan HE Runyao DUAN school of Data and Computer {1. Sun Yat-sen University Institute for Quantum computing Baidu Beijing Institute for Advanced Study Tsinghua University College of Mathematics & College of Information and Computer science Taiyuan University of Technology

Termination analysis is an essential part in programming. Especially quantum programming concerning measurement, entanglement and even superposition are the foundations of bizarre behaviours in quantum programs. In this paper, we analyse and extend the theoretical theorems on termination analysis proposed by Ying et al. into computational theorems and algorithms. The new algorithm without the Jordan decomposition process has a significant acceleration with polynomial complexity both on terminating and almost-surely terminating programs. Moreover, the least upper bound of termination programs steps is studied and utilized to output the substituted matrix representation of quantum programs. We also implement four groups of experiments to illustrate the advantages of the new algorithm in case of processing a simplified quantum walk example comparing with the original counterpart.

关键词： termination analysis quantum while-language quantum programming quantum experiment terminating steps

Fuzzy Aggregator Based Energy Aware RPL Routing for IoT Enabled Forest Environment

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Computers, Materials & Continua 2022年第8期72卷 4039-4055页

作者： S.Srividhya Suresh Sankaranarayanan Sergei A.Kozlov Joel J.P.C.Rodrigues Department of Data science and Business Systems School of ComputingSRM Institute of Science and TechnologyChennai603203TamilnaduIndia Department of Networking and Communications School of ComputingSRM Institute of Science and TechnologyChennai603203TamilnaduIndia ITMO University St.PetersburgRussia Senac Faculty of Ceará FortalezaCEBrazil Instituto de Telecomunicações Covilhã6201-001Portugal

Forested areas are extremely vulnerable to disasters leading to environmental *** Fire is one among them which requires immediate *** are lot of works done by authors where Wireless Sensors and IoT have been used for forest fire ***,towards monitoring the forest fire and managing the energy efficiently in IoT,Energy Efficient Routing Protocol for Low power lossy networks(E-RPL)was *** were challenges about the scalability of the network resulting in a large end-to-end delay and less packet delivery which led to the development of Aggregator-based Energy Efficient RPL with Data Compression(CAAERPL).Though CAA-ERPL proved effective in terms of reduced packet delivery,less energy consumption,and increased packet delivery ratio for varying number of nodes,there is still challenge in the selection of aggregator which is based purely on probability percentage of *** has been research work where fuzzy logic been employed for Mobile Ad-hoc Routing,RPL routing and cluster head selection in Wireless *** has been no work where fuzzy logic is employed for aggregator selection in Energy Efficient *** accordingly,we here have proposed Fuzzy Based Aggregator selection in Energy-efficient RPL for region thereby forming DODAG for communicating to Fog/*** here have developed fuzzy inference rules for selecting the aggregator based on strength which takes residual power,Node degree,and Expected Transmission Count(ETX)as input *** Fuzzy Aggregator Energy Efficient RPL(FA-ERPL)based on fuzzy inference rules were analysed against E-RPL in terms of scalability(First and Half Node die),Energy Consumption,and aggregator node energy *** the analysis,it was found that FA-ERPL performed better than *** were simulated using MATLAB and results.

关键词： Fuzzy logic aggregator IoT RPL routing wireless sensor network

Direct Reduction of High-phosphorus Oolitic Hematite Ore Based on Biomass Pyrolysis

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Journal of Iron and Steel Research International 2016年第9期23卷 874-883页

作者： Dong-bo HUANG Yan-bing ZONG Ru-fei WEI Wei GAO Xiao-ming LIU school of Metallurgical and Ecological Engineering University of Science and Technology Beijing school of Civil and Environmental Engineering University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

Direct reduction of high-phosphorus oolitic hematite ore based on biomass pyrolysis gases （CO, H2, and CH4 ）, tar, and char was conducted to investigate the effects of reduction temperature, iron ore-biomass mass ratio, and reduction time on the metallization rate. In addition, the effect of particle size on the dephosphorization and iron recovery rate was studied by magnetic separation. It was determined that the metallization rate of the hematite ore could reach 99.35 % at iron ore-biomass mass ratio of 1.： 0.6, reduction temperature of 1.00℃, and reduction time of 55 min. The metallization rate and the aggregation degree of iron particles increase with the increase of reduction temperature. The particle size of direct reduced iron （DRI） has a great influence on the quality of the iron concentrate during magnetic separation. The separation degree of slag and iron was improved by the addition of 1. mass% sodium carbonate. DRI with iron grade of 89.1.%, iron recovery rate of 83.47%, and phosphorus content of 0.28% can be obtained when ore fines with particle size of -1.μm account for 78.1.%.

关键词： high-phosphorus oolitic hematite ore direct reduction biomass pyrolysis dephosphorization