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Progress in Semi-arid Climate Change Studies in China

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Advances in Atmospheric Sciences 2019年第9期36卷 922-937页

作者： Jianping HUANG Jieru MA Xiaodan guan yue LI Yongli HE Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China Agronomy College Shenyang Agricultural UniversityShenyang 110866China

This article reviews recent progress in semi-arid climate change research in *** indicate that the areas of semiarid regions have increased rapidly during recent years in China,with an increase of 33%during 1994-2008 compared to *** have found that the expansion rate of semi-arid areas over China is nearly 10 times higher than that of arid and sub-humid areas,and is mainly transformed from sub-humid/humid ***,the greatest warming during the past 100 years has been observed over semi-arid regions in China,and mainly induced by radiatively forced *** intensity of the regional temperature response over semi-arid regions has been amplified by land-atmosphere interactions and human *** decadal climate variation in semi-arid regions is modulated by oceanic oscillations,which induce land-sea and north-south thermal contrasts and affect the intensities of westerlies,planetary waves and blocking *** addition,the drier climates in semi-arid regions across China are also associated with the weakened East Asian summer monsoon in recent ***,dust aerosols in semi-arid regions may have altered precipitation by affecting the local energy and hydrological ***,semi-arid regions in China are projected to continuously expand in the 21st century,which will increase the risk of desertification in the near future.

关键词： semi-arid regions drying expansion warming dynamics

Virtual 5G Network Embedding in a Heterogeneous and Multi-Domain Network Infrastructure

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China Communications 2016年第10期13卷 29-43页

作者： Cunqian Yu Weigang Hou Yingying guan yue Zong Pengxing Guo School of Computer Science and Engineering Northeastern University

The pursuit of the higher performance mobile communications forces the emergence of the fifth generation mobile communication(5G). 5G network, integrating wireless and wired domain, can be qualified for the complex virtual network work oriented to the cross-domain requirement. In this paper, we focus on the multi-domain virtual network embedding in a heterogeneous 5G network infrastructure, which facilitates the resource sharing for diverse-function demands from fixed/mobile end users. We proposed the mathematical ILP model for this *** based on the layered-substrate-resource auxiliary graph and an effective six-quadrant service-type-judgment method, 5G embedding demands can be classified accurately to match different user access densities. A collection of novel heuristic algorithms of virtual 5G network embedding are proposed. A great deal of numerical simulation results testified that our algorithm performed better in terms of average blocking rate, routing latency and wireless/wired resource utilization, compared with the benchmark.

关键词： 5G virtual network embedding heterogeneous and multi-domain infrastructure wireless channel capacity data center

Characteristic and mechanism of Cr(Ⅵ) adsorption by ammonium sulfamate-bacterial cellulose in aqueous solutions

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Chinese Chemical Letters 2013年第3期24卷 253-256页

作者： Min Lu Xiao-hui guan Xiao-hui Xu De-Zhou Wei School of Chemical Engineering Northeast Dianli University School of Resources & Civil Engineering Northeastern University

A new adsorbent, ammonium sulfamate-bacterial cellulose （ASBC）, was prepared through chemical modifications of bacterial cellulose. The process of adsorbing Cr（VI） including its isotherm and kinetics, was measured and studied. The results showed that pH value was a very important parameter to the adsorbing efficiency. The adsorption kinetics can be described by a pseudo-second rate model and a particle diffusion equation. Both physical and chemical adsorptions existed in the adsorption process, but chemical adsorption was more dominatant. And particles internal diffusion was not the only rate controlling step. The adsorption equilibrium can be described by the Langmuir type, which indicated that a typical single-molecule layer adsorption of Cr（VI） by ASBC could be described. And the rate of adsorption followed the Slips model well, which indicated that ASBC had some multiphase and asymmetry. The coordination adsorption and ion exchange effect were the main mechanisms of chemical adsorption. The absorbed Cr（V1） can be desorbed effectively by 0.5 mol/L EDTA or HCI from the adsorbent, which could make it be reusable

关键词： Ammonium sulfamate-bacterial celluloseAdsorption characteristicAdsorption mechanismCr(Vl)

Processing and oxidation of co-deposited Ni-Al coatings

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 199-203页

作者： ZHOU yue-bo PENG Xiao WANG Fu-hui State Key Laboratory for Corrosion and Protection Institute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China State Key Laboratory for Corrosion and Protection Institute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China State Key Laboratory for Corrosion and Protection Institute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China

Electrodeposited Ni matrix/Al microparticles or nanoparticles dispersed composite coatings (termed as EMCCs or ENCCs) are developed from a Ni-based electrolyte bath. The Al microparticles are in a size range of 1 -5 μm and the Al nanoparticles in an average size of 75 nm. The Al content in coatings increases with increase in the particle content in the bath. Particle size effect on the degree of codeposition is not significant. However, codeposition of Al nanoparticles instead of microparticles promotes more homogenous growth of Ni deposits on {111}, {200} and {220} planes. The oxidation at 1 050 ℃ of the as-deposited composite coatings shows that at a comparable Al content, ENCC of Ni-Al exhibits a better oxidation resistance than EMCC of Ni-Al due to the fast formation of an alumina scale during the transient stage of oxidation.

关键词： electrodeposition co-deposition Ni-Al composite coating high temperature oxidation microparticle nanoparticle

Defect in an immune regulator gene BrSRFR1 leads to premature leaf senescence in Chinese cabbage

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Horticultural Plant Journal 2024年第6期10卷 1414-1423页

作者： yue Xin Gengxing Song Chong Tan hui Feng College of Horticulture Shenyang Agricultural UniversityShenyangLiaoning 110866China

Leaf senescence is the final stage of leaf development, where the nutrients and energy of senescent leaves are redistributed to developing tissues or organs for plant growth, reproduction, and defense. Outer leaves are photosynthetic organs that usually senesce at the late heading stage in Chinese cabbage, and premature leaf senescence often reduces leafy head yield and quality. In this study, 11 premature leaf senescence mutants were screened from an ethyl methanesulfonate-mutagenized population of the double haploid line ‘FT' in Chinese cabbage. At the early heading stage, the mutants exhibited edge yellowing within its outer leaves, and at the mature stage, its leafy head weight decreased significantly. Genetic analysis revealed that the mutated trait of all 11 mutants corresponds to single gene recessive inheritance. Semi-diallel cross tests showed that 5 of the 11 were allelic mutants. MutMap and Kompetitive Allele Specific PCR genotyping revealed that BraA01g001400.3C was the candidate gene, which is orthologous of Arabidopsis SUPPRESSOR OF rps4-RLD 1, encoding an immune regulator, so we named it as BrSRFR1. All the BrSRFR1 in the five allelic mutants exhibited single nucleotide polymorphisms at different positions on their exons and led to premature translation termination, which confirmed that defect in BrSRFR1 led to premature leaf senescence. These results verify the role of Br SRFR1 on leaf senescence and provide a new insight into the mechanisms of leaf senescence in Chinese cabbage, which reveals a novel function of SRFR1 in plant development.

关键词： Chinese cabbage Premature leaf senescence SRFR1 Gene cloning

Attention Markets of Blockchain-Based Decentralized Autonomous Organizations

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1370-1380页

作者： Juanjuan Li Rui Qin Sangtian guan Wenwen Ding Fei Lin Fei-yue Wang State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China Faculty of Innovation Engineering Macao University of Science and TechnologyMacao 999078China State Key Laboratory for Management and Control of Complex Systems Chinese Academy of SciencesBeijing 100190 Faculty of Innovation Engineering Macao University of Science and TechnologyMacao 999078China IEEE

The attention is a scarce resource in decentralized autonomous organizations(DAOs),as their self-governance relies heavily on the attention-intensive decision-making process of“proposal and voting”.To prevent the negative effects of pro-posers’attention-capturing strategies that contribute to the“tragedy of the commons”and ensure an efficient distribution of attention among multiple proposals,it is necessary to establish a market-driven allocation scheme for DAOs’***,the Harberger tax-based attention markets are designed to facilitate its allocation via continuous and automated trading,where the individualized Harberger tax rate(HTR)determined by the pro-posers’reputation is ***,the Stackelberg game model is formulated in these markets,casting attention to owners in the role of leaders and other competitive proposers as *** equilibrium trading strategies are also discussed to unravel the intricate dynamics of attention ***,utilizing the single-round Stackelberg game as an illustrative example,the existence of Nash equilibrium trading strategies is ***,the impact of individualized HTR on trading strategies is investigated,and results suggest that it has a negative correlation with leaders’self-accessed prices and ownership duration,but its effect on their revenues varies under different *** study is expected to provide valuable insights into leveraging attention resources to improve DAOs’governance and decision-making process.

关键词： Attention decentralized autonomous organizations Harberger tax Stackelberg game.

Mechanical properties and wear resistance of ultrafine bainitic steel under low austempering temperature

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International Journal of Minerals,Metallurgy and Materials 2020年第4期27卷 483-493页

作者： Wei Liu You-hui Jiang hui Guo yue Zhang Ai-min Zhao Yao Huang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Mechanical Engineering Weifang University of Science and TechnologyShouguang 262700China China Electric Power Research Institute Beijing 100192China

The mechanical properties and wear resistance of the ultrafine bainitic steel austempered at various temperatures were *** electron microscopy(SEM)and X-ray diffraction were used to analyze the *** worn surfaces were observed via laser scanning confocal microscopy and *** indicated that,under low austempering temperatures,the mechanical properties differed,and the wear resistance remained basically *** tensile strength of the samples was above 1800 MPa,but only one sample austempered at 230°C had an elongation of more than 10%.The weight loss of samples was approximately linear with the cycles of wear and nonlinear with the *** samples showed little difference in wear resistance at different isothermal temperatures,whereas the thickness of their deformed layers varied *** results are related to the initial hardness of the sample and the stability of the retained ***,the experimental results showed that the effect of austempering temperature on the wear resistance of ultrafine bainitic steel can be neglected under low applied loads and low austempering temperature.

关键词： bainitic steel mechanical properties wear resistance austempering temperature

Effect of Heat Treatment Process on Properties of 1000 MPa Ultra-High Strength Steel

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Journal of Iron and Steel Research International 2011年第2期18卷 64-69页

作者： YU Wei QIAN Ya-jun WU hui-bin YANG yue-hui Metallurgical Engineering Institute University of Science and Technology Beijing Beijing 100083 China

Two types of steel, C-Mn-CrMo B microalloyed steel and C-Mn-Mo-Nb-Cu-B microalloyed steel, are designed to develop 1000 MPa ultra high strength steel. Two kinds of processes, thermomeehanical controlled process （TMCP） combined with traditional off-line quenching and tempering （QT） process versus controlled rolling process （CR） combined with direct quenching and tempering （DQ＋T） process, are applied. The effect of heat treatment processing mode on the microstructure and mechanical properties is studied. The relationship between microstructure and mechanical properties is investigated by SEM and TEM. After tempering at 450 to 550 ℃ for 1 h, the steel produced by TMCP＋QT process shows combination of excellent strength and low temperature toughness. The yield strength is above 1 000 MPa, elongation above 15% and impact energy at -40 ℃ more than 30 J. After tempering at 450 ℃, a large number of ε-Cu particles precipitated in C-Mn-Mo-Nb-Cu-B steel produced by CR＋DQ＋T process lead to a significant increase in yield strength. And after tempering at 500 to 600 ℃, the yield strength of the steel is further improved to 1 030 MPa because of precipitates, such as nitride or carbide of niobium, carbide of molybedenum and vanadium. When the tempering temperature is increased above 620 ℃, the yield strength is still higher than 1 000 MPa and elongation is above 20% and impact energy at --40 ℃ is more than 35 J. After tempering at above 500 ℃, the toughness of the steel treated by TMCP＋QT process is superior to that of steel by CR＋DQ＋T process.

关键词： heat treatment high strength steel microstructure mechanical property

Evaluating multiple parameters dependency of base temperature for heating degree-days in building energy prediction

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Building Simulation 2021年第4期14卷 969-985页

作者： Qinglong Meng Yuan Xi Xingxing Zhang Monjur Mourshed yue hui School of Civil Engineering Chang’an UniversityXi’an710061China School of Industrial Technology and Business Studies Dalarna UniversityFalun79188Sweden School of Engineering Cardiff UniversityCardiffCF243AAUK

To improve the prediction accuracy of heating demand, an appropriate base temperature should be estimated before using the heating degree-days (HDD) approach. This study collected the measured data for gas consumption at half-hourly resolution and the building physical characteristics from 89 educational buildings over four years. To determine the base temperature, in addition to the ambient temperature, more detailed independent variables, i.e. solar insolation, relative humidity, wind speed, and one-day ahead residual temperature, were incorporated into a three-parameter change-point multi-variable regression (3PH-MVR) for heating. The mean base temperature using the 3PH-MVR approach was about 0.4℃ lower than the results from the 3PH method only. The relationships between base temperature and annual HDD (based on 15.5℃), building location, and mean daily solar insolation were evaluated. It is found that the annual HDD and the daily insolation had clear impacts on base temperature, while there was a plausible relationship between base temperature and building location. Compared with traditional approach, the proposed 3PH-MVR method considers multiple weather parameters and determines a more robust base temperature, thus improving the prediction accuracy of HDD with higher average R2 value at 0.86 than that of univariate regression (0.82).

关键词： base temperature heating degree-days residual temperature change-point regression gas consumption