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A Direct Liquid Fuel Cell with High Power Density Using Reduced Phosphotungstic Acid as Redox Fuel

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Energy & Environmental Materials 2022年第1期5卷 278-284页

作者： Yiyang Liu Ting Feng Shanfu Lu haining wang Yan Xiang Beijing Key Laboratory of Bio-inspired Energy Materials and Devices School of Space and EnvironmentBeihang UniversityBeijing 100191China School of Energy and Power Engineering Beihang UniversityBeijing 100191China

Direct liquid fuel cells(DLFCs)are proposed to address the problems of high cost and complex storage and transportation of hydrogen in traditional hydrogen-oxygen proton exchange membrane fuel ***,present fuels of organic small molecules used in DLFCs are restricted to problems of sluggish electrochemical kinetics and easily poisoning of precious metal ***,we demonstrate reduced phosphotungstic acid as a liquid fuel for DLFCs based on its advantages of high chemical and electrochemical stability,high electrochemical activity on common carbon material electrodes,and low permeability through proton exchange *** application of phosphotungstic acid fuel effectively solves the problems of high cost of anode catalysts and serious fuel permeation loss in traditional DLFCs.A phosphotungstic acid fuel cell achieves a peak power density of466 mW cm^(-2)at a cell voltage of 0.42 V and good stability at current densities in the range from 20 to 200 mA cm^(-2).

关键词： direct liquid fuel cell heteropoly acid phosphotungstic acid power density renewable fuel

New insights into the relationships between performance and physicochemical properties of FeO_(x)-NbO_(x)mixed oxide catalysts for the NH_(3)-SCR reactions

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Waste Disposal and Sustainable Energy 2021年第2期3卷 97-106页

作者： Dong Ye Xiaoxiang wang Hui Liu haining wang College of Quality and Safety Engineering China Jiliang UniversityHangzhou 310018China Key Laboratory of Biomass Chemical Engineering of Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China

In this study,we prepared Fe_(2)O_(3)-Nb_(2)O_(5)binary mixed oxide catalysts using co-precipitation(CP),sol-gel(SG),and solid process(SR)methods and tested their *** the catalysts exhibited over 75%NO_(x)removal efficiency between 250℃and 400℃.Compared with the samples prepared by the SR method,catalyst synthesized using CP and SG methods possessed a larger specific surface area,which could compensate for the lower surface area-normalized reaction rate originat-ing from the insufficient reactive surface oxygen species,hence exhibiting a relatively high low-temperature apparent deNO_(x)***,at a high-temperature region,limited amount of reactive surface oxygen species,together with abundant strong acid sites,facilitated the proceeding of NH_(3)reduction of NO_(x),which well explained the higher apparent activity of the catalyst prepared by SG method than the other two *** seemed that specific surface area had an important role to play in the low-temperature apparent performance of the catalysts,while chemical properties mainly decided the activity at an elevated temperature.

关键词： Selective Catalytic Reduction Fe_(2)O_(3)-Nb_(2)O_(5) Surface area Preparation methods Chemical properties

Detecting incentivized review groups with co-review graph

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High-Confidence Computing 2021年第1期1卷 35-44页

作者： Yubao Zhang Shuai Hao haining wang Department of Electrical and Computer Engineering University of DelawareNewarkDE 19716USA Department of Computer Science Old Dominion UniversityNorfolkVA 23529USA Bradley Department of Electrical and Computer Engineering Virginia TechArlingtonVA 22203 USA

Online reviews play a crucial role in the ecosystem of nowadays business(especially e-commerce platforms),and have become the primary source of consumer *** manipulate consumers’opinions,some sellers of e-commerce platforms outsource opinion spamming with incentives(e.g.,free products)in exchange for incen-tivized *** incentives,by nature,are likely to drive more biased reviews or even fake *** e-commerce platforms such as Amazon have taken initiatives to squash the incentivized review practice,sellers turn to various social networking platforms(e.g.,Facebook)to outsource the incentivized *** aggre-gation of sellers who request incentivized reviews and reviewers who seek incentives forms incentivized review *** this paper,we focus on the incentivized review groups in e-commerce *** perform the data collections from various social networking platforms,including Facebook,WeChat,and Douban.A measurement study of incentivized review groups is conducted with regards to group members,group activities,and *** identify the incentivized review groups,we propose a new detection approach based on co-review ***,we employ the community detection method to find the suspicious communities from co-review *** also build a“gold standard”dataset from the data we collected,which contains the information of reviewers who belong to incentivized review *** utilize the“gold standard”dataset to evaluate the effectiveness of our detection approach.

关键词： Incentivized review groups Co-review graph Community detection

A Flexible Three Clouds 5G Mobile Network Architecture Based on NFV & SDN

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China Communications 2015年第S1期12卷 121-131页

作者： YANG Fengyi wang haining MEI Chengli ZHANG Jianmin wang Min China Telecom Corporation Limited Technology Innovation Center

Along with the completion of the development of 4G technologies, the global mobile community starts the study of the next generation technologies, i.e. 5G technologies. This paper proposes a new flexible architecture for 5G mobile networks based on Network Function Virtualization(NFV) and Software Defined Network(SDN) technologies, which is adaptable to use cases and scenarios. Then implementation reference architecture and some typical 5G network deployment cases are discussed. Besides, some key issues for further study are also indicated at the end.

关键词： 5G network architecture NFV SDN deployment

A Hybrid Silicon-PDMS Micropump Actuated by PZT Bimorph

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稀有金属材料与工程 2006年第A3期35卷 319-320页

作者： haining wang Dafu Cui Zhaoxin Geng Xing Chen State Key Lab. of Transducer Tech. Inst. of Electronics Chinese Academy of Sciences Beijing 100080 China

The fabrication and characterization of a hybrid Silicon-PDMS micropump based on MEMS technology is presented. The micropump consists of one chamber,two passive valves and one PDMS diaphragm.A PZT bimorph working as the actuator is mounted on the PDMS *** use of the PDMS diaphragm and the PZT bimorph can give rise to large displacements of the pump diaphragm,making the micropump more efficient and easier to be *** flow rate of the micropump is a function to the voltage and frequency of the applied square *** a square wave of 100V is applied,a maximum flow rate of 317μL/min and a back-pressure of 2 kPa are achieved at 20 Hz.

关键词： micropump PZT bimorph PDMS

Optimizing flow field in an SCR system of a 600 MW power plant:effects of static mixer alignment style

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Waste Disposal and Sustainable Energy 2021年第4期3卷 339-346页

作者： Dong Ye Xiaoxiang wang Runxian wang Shujie Gao Hui Liu haining wang College of Quality and Safety Engineering China Jiliang UniversityHangzhou 310018China Key Laboratory of Biomass Chemical Engineering of Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China

The fluid flow in a selective catalytic reduction(SCR)system of a 600 MW power station is optimized using the numerical simulation method in this *** that guide plates and straightening gratings are properly installed,the relative standard deviation(C_(v))of velocity related to the inlet of an ammonia injection grid(AIG)and catalysts satisfy the engineering demand of<15%,suggesting that a relatively uniform velocity field is *** in-line arrangement of static mixers strengthens the disturbance of fluid,promoting the mixing of reductant NH_(3)with flue *** NH_(3)mole fraction C_(v)value correlated to the inlet of catalysts drops to ca.3.5%,which is lower than that in the cases when the mixers are aligned in a staggered *** results indicate that a solid foundation is achieved for the effective abatement of NO_(x)in practical applications.

关键词： Selective catalytic reduction Flow field Static mixers Alignment style Relative standard deviation

Construction of porous covalent organic polymer as photocatalysts for RhB degradation under visible light

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Science Bulletin 2017年第13期62卷 931-937页

作者： Pingxiao Liu Lingbao Xing Hongtao Lin haining wang Ziyan Zhou Zhongmin Su School of Chemical Engineering Shandong University of Technology College of Chemistry Northeast Normal University

In the present work, a novel porous, and chemically stable amine-based covalent organic polymer （POP-1） was designed and synthesized under solvothermal conditions. The porosity, crystallinity, chemical stability, electrochemical properties, and diffuse reflectance of POP-1 were investigated via N2 sorp- tion experiment, power X-ray diffraction, thermogravimetric analysis, cyclic voltammetry, and ultraviolet visible near infrared spectrometry, respectively. POP-I exhibits good chemical stability in both acidic and alkaline aqueous solutions, as well as in organic solvents. Undoped POP-1 can be directly used as a pho- tocatalyst for rhodamine B irradiation degradation under light-emitting diode and natural light. The Ea of POP-1 for RhB degradation is 82.37 kJ/mol. Furthermore, POP-1 can be reused as a catalyst in RhB degra- dation without degraded catalytic activity.

关键词： Porous organic polymerMetal-freeSolvothermal synthesisPhotocatalytic degradation

Distributed Cooperative Secondary Voltage Control in an Unbalanced Microgrid

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 222-234页

作者： Xiangzhen Yang Haixi Zhao Mengke Duan Yan Du haining wang Jian Zhang School of Electrical Engineering and Automation Hefei University of TechnologyHefei 23009China

The negative-sequence reactive power-conductance(Q^(−)-G) droop control strategy is a conventional method to compensate for the output unbalanced voltages in an islanded ***, the conflict between unbalanced voltage compensation and negative-sequence reactive power sharing, caused bythe impedance mismatching of distribution lines and distributedgenerators, has not been solved only by Q^(−)-G droop *** this paper, a distributed cooperative secondary unbalancedvoltage control strategy is proposed to decrease the outputvoltage unbalance factor (VUF) of each droop-controlled DG,as well as to further enhance the negative-sequence reactivepower sharing effectiveness among DGs by properly shiftingup and down the Q^(−)-G droop characteristics of each *** algorithm for adaptive VUF weight coefficient is proposedto better suppress VUF under severe imbalance ***, a negative-sequence small-signal model of an MGunder an unbalanced condition, considering the communicationdelay time of the proposed SUVC, is established to analyze thesystem’s stability and transient performance under the influenceof some critical parameters. Finally, the effectiveness of theproposed strategy is validated by the simulation results froma real-time emulator of StarSim HIL.

关键词： Distributed cooperative control MG negativesequence reactive power starsim real-time platform time delay voltage unbalance compensation

High Performance DNA Purification Microchip with Porous Silicon Dioxide Carrier Matrix

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稀有金属材料与工程 2006年第A3期35卷 284-287页

作者： Xing Chen Dafu Cui Changchun Liu Bo Su haining wang State Key Lab. of Transducer Tech. Inst. of Electronics Chinese Academy of Sciences Beijing 100080 China

Solid-phase extraction method has proven efficient and amenable to microchips.A novel DNA purification microchip was demonstrated using porous silicon dioxide as the solid phase *** SiO_2 was coated on the wall of the channel of the microchip to provide a surface-enlarging *** porous silicon was achieved by anodisation of the silicon reactor in a HF/ethanol mixture and then was oxidized thermally at a lower increasing/decreasing rate to form porous SiO_*** optimization of the preparing conditions a more stable microchip was *** with the microchip without the porous layer,the microchip with the porous SiO_2 layer achieved higher extracted efficiency of *** DNA from rat whole blood could be extracted and purified in 35 minutes.

关键词： microfluidic solid phase extraction porous SiO2 DNA purification