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Combined Photoredox Catalysis for Value-Added Conversion of Contaminants at Spatially Separated Dual Active Sites

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Research 2023年第3期6卷 597-607页

作者： Jieyuan Li Ruimin Chen Kaiwen Wang Yan yang Jielin Wang weiping yang Shengyao Wang Guidong yang Fan Dong Research Center for Carbon-Neutral Environmental and Energy Technology Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu 611731China Beijing Key Lab of Microstructure and Properties of Advanced Materials Beijing University of TechnologyBeijing 100124China School of Environmental Science and Engineering Institute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006GuangdongChina College of Science Huazhong Agricultural UniversityWuhan 430070China XJTU-Oxford Joint International Research Laboratory of Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China

As 2 indispensable counterparts in one catalysis system,the independent reduction and oxidation reactions require synergetic regulation for cooperatively promoting redox *** the current success in promoting the catalytic efficiency of half reduction or oxidation reactions,the lack of redox integration leads to low energy efficiency and unsatisfied catalytic ***,we exploit an emerging photoredox catalysis system by combining the reactions of nitrate reduction for ammonia synthesis and formaldehyde oxidation for formic acid production,in which superior photoredox efficiency is achieved on the spatially separated dual active sites of Ba single atoms and Ti^(3+).High catalytic redox rates are accomplished for respective ammonia synthesis(31.99±0.79 mmol gcat^(−1) h^(−1))and formic acid production(54.11±1.12 mmol gcat^(−1) h^(−1)),reaching a photoredox apparent quantum efficiency of 10.3%.Then,the critical roles of the spatially separated dual active sites are revealed,where Ba single atoms as the oxidation site using h+and Ti3+as the reduction site using e−are identified,*** efficient photoredox conversion of contaminants is accomplished with environmental importance and competitive economic *** study also represents a new opportunity to upgrade the conventional half photocatalysis into the complete paradigm for sustainable solar energy utilization.

关键词： redox catalysis accomplished

Virtual design and analysis with multi-dimension coupling for engineering machinery cooling system

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Science China(Technological Sciences) 2015年第1期58卷 117-122页

作者： CAI HuiKun QIAN YaoYi HOU Liang WANG WenWu ZHANG EnLai yang weiping Department of Mechanical and Electrical Engineering Xiamen University Shenzhen Research Institute of Xiamen University

A good cooling circle should ensure that the system can work at an appropriate temperature in the requirements of power increase,engine compartment constraint and working demands for modern engineering machinery,which asks for a thorough understanding of system thermal loads before practical ***,traditional experiment method spends a long time,costs a huge resource but lacks efficiency,whereas virtual design can avoid the shortcomings of traditional method and can analyze operating states adequately with variable loads on engine,generator,drives,battery pack and HVAC ***,this paper focuses on a new virtual design method based on multi-dimension coupled simulation adopting Flowmaster software for initial prediction and CFX tool for further *** simulation results in different operating conditions are compared and validated with *** experiment and range analysis are used to explore key parameters of cooling *** research will be helpful in guiding future design and optimization of engineering machinery.

关键词： engineering machinery cooling system virtual design multi-dimension coupled simulation radiator air inlet temperature

Real-time digital image stabilization based on regional field image gray projection

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Journal of Systems Engineering and Electronics 2016年第1期27卷 224-231页

作者： weiping yang Zhilong Zhang Yan Zhang Xinping Lu Jicheng Li Zhiguang Shi School of Electronic Science and Engineering National University of Defence Technology

Digital image stabilization technique plays important roles in video surveillance and object *** useful electronic image stabilization algorithms have been studied.A real-time algorithm is proposed based on field image gray projection which enables the regional odd and even field image to be projected into x and y directions and thus to get the regional gray projection curves in x and y directions,*** the odd field image channel,motion parameters can be estimated via iterative minimum absolute difference based on two successive field image regional gray projection *** motion compensations can be obtained after using the Kalman filter ***,the odd field image is adjusted according to the *** the mean time,motion compensation is applied to the even field image channel with the odd field image gray projection curves of the current *** minimizing absolute difference between odd and even field image gray projection curves of the current frame,the inter-field motion parameters can be ***,the even field image can be adjusted by combining the inter-field motion parameters and the odd field ***,the stabilized image sequence can be obtained by synthesizing the adjusted odd and even field *** results show that the proposed algorithm can run in real-time and have a good stabilization *** addition,image blurring can be improved.

关键词： image dithering field based processing electronic image stabilization regional gray projection minimum absolute difference.

ZnFe_(2)O_(4)/BiVO_(4)Z-scheme heterojunction for efficient visible-light photocatalytic degradation of ciprofloxacin

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Frontiers of Chemical Science and Engineering 2023年第11期17卷 1728-1740页

作者： Beibei Wang Kejiang Qian weiping yang Wenjing An Lan-Lan Lou Shuangxi Liu Kai Yu MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Technology for Complex Transmedia PollutionCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China Institute of New Catalytic Materials Science School of Materials Science and EngineeringNational Institute of Advanced MaterialsNankai UniversityTianjin 300350Chin

A novel Z-scheme ZnFe_(2)O_(4)/BiVO_(4)heterojunction photocatalyst was successfully synthesized using a convenient solvothermal method and applied in the visible light photocatalytic degradation of ciprofloxacin,which is a typical antibiotic contaminant in *** heterostructure of as-synthesized catalysts was confirmed using X-ray diffraction,scanning electron microscopy,transmission electron microscopy and X-ray photoelectron spectroscopy *** with the singlephase counterparts,ZnFe_(2)O_(4)/BiVO_(4)demonstrated considerably enhanced photogenerated charge separation efficiencies because of the Z-scheme transfer mechanism of electrons between the composite ***,the 30%ZnFe_(2)O_(4)/BiVO_(4)catalyst afforded a degradation rate of up to 97%of 20 mg/L ciprofloxacin under 30 min of visible light irradiation with a total organic carbon removal rate of 50%,which is an excellent activity compared with ever reported BiVO_(4)-based *** addition,the liquid chromatography-mass spectrometry and quantitative structure-activity relationships model analyses demonstrated that the toxicity of the intermediates was lower than that of the parent ***,the as-synthesized ZnFe_(2)O_(4)/BiVO_(4)heterojunctions were quite stable and could be reused at least four *** study thus provides a promising Z-scheme heterojunction photocatalyst for the efficient removal and detoxication of antibiotic pollutants from wastewater.

关键词： ZnFe_(2)O_(4)/BiVO_(4) Z-scheme heterojunction photocatalytic degradation ciprofloxacin

OsbZIP60-mediated unfolded protein response regulates grain chalkiness in rice

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Journal of Genetics and Genomics 2022年第5期49卷 414-426页

作者： weiping yang Pengkun Xu Juncheng Zhang Shuo Zhang Zhenwei Li Ke yang Xinyuan Chang Yibo Li aNational Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research(Wuhan) Huazhong Agricultural UniversityWuhanHubei 430070China Hubei Hongshan Laboratory WuhanHubei 430070China

Grain chalkiness,an undesirable trait caused by complex factors,has great negative impacts on the quality and economic value of ***,little is known about the regulatory mechanism of grain chalkiness,particularly the effect of endoplasmic reticulum(ER)***,a genome-wide association study(GWAS)reveals that the transcription factor Osb ZIP60 is a vital regulator of rice grain *** analysis demonstrates that knockout of Osb ZIP60 results in extremely high grain chalkiness and aberrant structure of storage ***,the expression of unfolded protein response(UPR)genes,such as OsbZIP50,Os Bi P1,Os Bi P2 and Os Bi P3,is up-regulated in the endosperm cells of osbzip60,and overexpression of all these UPR genes causes various degrees of ***,Osb ZIP60 is found to activate the expression of key genes related to grain chalkiness,such as GPA3,FSE1,FLO7,Chalk5,Os NF-YB1,and Os PK2,whose expression is significantly suppressed in osbzip60 and overexpression lines of Osb ZIP50,Os Bi P1,Os Bi P2,and Os Bi *** study provides novel insights into the function of Osb ZIP60 and the role of the UPR pathway in the formation of grain chalkiness in rice.

关键词： Rice Grain chalkiness GWAS OsbZIP60 OsbZIP50 UPR

Target rotation parameter estimation for ISAR imaging via frame processing

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红外与激光工程 2016年第3期45卷 7-17页

作者： Xuezhi Wang Yajing Huang weiping yang Bill Moran School of Electrical and Computer Engineering RMIT University School of Electronic Science and Engineering National University of Defense Technology

Frame processing method offers a model-based approach to Inverse Synthetic Aperture Radar(ISAR) imaging. It also provides a way to estimate the rotation rate of a non-cooperative target from radar returns via the frame operator properties. In this paper, the relationship between the best achievable ISAR image and the reconstructed image from radar returns was derived in the framework of Finite Frame Processing theory. We show that image defocusing caused by the use of an incorrect target rotation rate is interpreted under the FP method as a frame operator mismatch problem which causes energy dispersion. The unknown target rotation rate may be computed by optimizing the frame operator via a prominent point. Consequently, a prominent intensity maximization method in FP framework was proposed to estimate the underlying target rotation rate from radar returns. In addition, an image filtering technique was implemented to assist searching for a prominent point in practice. The proposed method is justified via a simulation analysis on the performance of FP imaging versus target rotation rate *** of the proposed method is also confirmed from real ISAR data experiments.

关键词： ISAR imaging frame theory frame processing target rotation rate radar waveforms

Comparative Analysis of Climate Conditions and Adaptability of Flue-cured Tobacco Growing in Field in Enshi Prefecture

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Meteorological and Environmental Research 2014年第8期5卷 39-40,47页

作者： yang weiping Enshi Vocational and Technical College

By the comparative analysis of climate conditions （ten-day average temperature, rainfall and sunshine hours） and physiological needs of flue-cured tobacco growing in field in Enshi Prefecture, it is found that precipitation is insufficient at the seedling stage but very sufficient in the maturation pedod, which has limited the production of high quality tobacco. To produce high quality tobacco in Enshi Prefecture, it is needed to breed middle and late varieties with longer growth period, improve current breeding methods to increase transplanting elasticity, water transported seedlings enough, and control diseases and insect pests.

关键词： Flue-cured tobacco Temperature Precipitation Physiological needs China

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新一代飞行器导航制导与控制技术发展趋势

航空学报 2024年第5期45卷 146-170页

作者：杨卫平航空工业西安飞行自动控制研究所西安710075

系统梳理了航空导航制导与控制技术的国内外发展现状,通过需求牵引、原理机理、产品实现、应用服务等方面的对比,分析了存在的差距并剖析了原因。在航空飞行器支撑体系化协同作战的大背景下,将网络化、体系化、智能化要求作为技术发展目... 详细信息

系统梳理了航空导航制导与控制技术的国内外发展现状,通过需求牵引、原理机理、产品实现、应用服务等方面的对比,分析了存在的差距并剖析了原因。在航空飞行器支撑体系化协同作战的大背景下,将网络化、体系化、智能化要求作为技术发展目标,在支撑新质作战概念、高精度自主导航、多体协同飞行器控制、新一代核心器件研发、下一代飞行器控制管理统一架构5个方面提出了导航制导与控制技术未来的发展重点和方案路线,最终在技术和管理2个层面提出行动建议,为引导中国优势创新资源有效联合,面向未来装备发展需要推进国防科技迈向高质量发展道路提供参考。

关键词：导航制导与控制航空飞行器高精度自主导航飞行控制飞行器管理

Synthesis, Characterization and Catalytic Application of H3PW12O40/MCM-48 in the Acetalization of Butyraldehyde with Glycol

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Journal of Chemistry and Chemical Engineering 2010年第4期4卷 29-33页

作者： Shuijin yang weiping Wang Baolan Lv Hubei Normal University College of Chemistry and Environmental Engineering Hubei Key Laborato~ of Pollutant Analysis ＆Reuse Technology Huangshi 435002 China

A novel environmental friendly catalyst, H3PW12O40/MCM-48, was prepared by impregnation method. The catalysts were characterized by means of XRD and FT-IR. The synthesis of butyraldehyde glycol acetal catalyzed by H3PW12O40/MCM-48 was studied with butyraldehyde and glycol as reactants. H3PW12O40/MCM-48 was an excellent catalyst for the synthesizing butyraldehyde glycol acetal and Keggin structure of H3PW12O40 kept unchanged after being impregnated on surface of the molecular sieve support. Effects of n（butyraldehyde）： n（glycol）, catalyst dosage, cyclohexane（water-stripped reagent） and reaction time on yields of the product were investigated. The optimum conditions had been found, that was, molar ratio of butyraldehyde to glycol was 1： 1.6, mass ratio of catalyst used to the reactants was 0.25% and reaction time was 75 min. Under these conditions, the yield of butyraldehyde glycol acetal can reach 79.74%.

关键词： MCM-48 molecular sieve phosphotungstic acid butyraldehyde glycol acetal catalysis acetalization.