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Nano Research 2025年第1期18卷 217-224页

作者： Taolue Sun Chen Jian Gang Wang hui zhao Guoliang Zhang Zengxi Li Chunshan Li State Key Laboratory of Mesoscience and Engineering CAS Key Laboratory of Green Process and EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China huizhou Institute of Green Energy and Advanced Materials Huizhou 516081China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516081China

Although the nickel-based catalyst is able toexhibit comparative catalytic activity to noble metal formethyl acrylate hydrogenation,it requires strict reactioncondition,which can be improved by regulation ofcoordination *** this study,we constructed akind of Ni single-atom coordinated with N and S(Ni-NSC)through the pyrolysis of organic Ni-based precursors at600℃.The existence and fine structure of Ni single-atom were confirmed by the spherical electron microscopicobservation in combination with the X-ray absorption spectroscopy(XAS)*** addition,the catalytichydrogenation assessment suggested that the as-prepared Ni-NSC catalyst exhibited higher activity and stability than theNi/NSC supported catalyst prepared by incipient wetness impregnation *** remarkable catalytic activity was dueto the high dispersion and density of Ni single-atom and weak adsorption energy of intermediates on these Ni sites.

关键词： methyl acrylate mild hydrogenation Ni single-atom coordination environment adsorption energy

The quasitriangular structures of biproduct Hopf algebras

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第1期8卷 149-157页

作者： zhao Li-hui zhao Wen-zheng Department of Mathematics Zhejiang University Hangzhou 310027 China Department of Mathematics Henan Normal University Xinxiang 453002 China

The construction of the biproduct of Hopf algebras, which consists of smash product and the dual notion of smash coproduct, was first formulated by Radford. In this paper we study the quasitriangular structures over biproduct Hopf algebras B*H. We show the necessary and sufficient conditions for biproduct Hopf algebras to be quasitriangular. For the case when they are, we determine completely the unique formula of the quasitriangular structures. And so we find a way to construct solutions of the Yang-Baxter equation over biproduct Hopf algebras in the sense of (Majid, 1990).

关键词： Hopf algebra Quasitriangular structure Biproduct

Trends of optimal dispatching of microgrid for fishery based on model predictive control

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Information Processing in Agriculture 2022年第1期9卷 135-147页

作者： ran zhao Maozhi Miao Yuntao Ju College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083China National Innovation Center for Digital Fishery Beijing 100083China

As a constrained optimization strategy,model predictive control(MPC)is widely used in the optimal dispatch of *** optimization and feedback correction strategy can effectively deal with the impact due to the system uncertainty and model mismatch which ensures the stable operation of the *** to the uncertainty of distributed power sources,MPC can be applied to solve the problem of renewable energy output in microgrid for *** paper reviews the optimal dispatch of microgrid for fishery based on model predictive ***,this article introduces the basic principles and classification of model predictive control,and then explains the remaining problems and research *** characteristics of the microgrid optimal dispatching problem are described,and the analysis are focused on how MPC solves the uncertain problems in the microgrid optimal ***,perspectives and the future research direction of model pre-dictive control in microgrid energy dispatch is reviewed.

关键词： Model predictive control Microgrid for Fishery Optimal dispatching New energy

A TWO-STAGE ESTIMATION ALGORITHM FOR A TYPE OF CURRENT STATUS DATA

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Journal of Systems Science & Complexity 2012年第3期25卷 556-566页

作者： hui zhao Ningning JIANG School of Mathematics and Statistics Central China Normal University Institute of Systems Science Academy of Mathematics and Systems ScienceChinese Academy of Sciences

Success-failure life tests are widely used in reliability engineering research to evaluate the storage life of products, where the observed data are the current status data, usually summarized as the form of ＂binomial life data＂. For this type of data, this paper proposes a two-stage algorithm to estimate some commonly used lifetime distributions. This Mgorithm is automatic, intuitively appealing and simple to implement. Simulation studies show that compared with some existing methods, the proposed algorithm is more stable and efficient, especially in small sample situations, and it can also be extended to deM with some complicated lifetime distributions.

关键词： Current status data nonparametric maximum likelihood estimation success-failure lifetest.

L^(2)Schrödinger Maximal Estimates Associated with Finite Type Phases in R^(2)

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Acta Mathematica Sinica,English Series 2024年第11期40卷 2809-2839页

作者： Zhuo ran LI Jun Yan zhao Teng Fei zhao Department of Mathematics Taizhou UniversityTaizhou225300P.R.China School of Mathematical Sciences Zhejiang Normal UniversityJinhua321004P.R.China School of Mathematics and Physics University of Science and Technology BeijingBeijing100083P.R.China

In this paper,we establish Schrödinger maximal estimates associated with the finite type phaseФ(ξ_(1),ξ_(2)):=ξ_(1)^(m)+ξ_(2)^(m),where m≥4 is an even ***[12],we prove an L2 fractal restriction estimate associated with the surface{(ξ_(1),ξ_(2),Ф(ξ_(1),ξ_(2))):(ξ_(1),ξ_(2)∈[0,]^(2)}as the main result,which also gives results on the average Fourier decay of fractal measures associated with these *** key ingredients of the proof include the rescaling technique from[16],Bourgain-Demeter’sℓ^(2)decoupling inequality,the reduction of dimension arguments from[17]and induction on *** notice that our Theorem 1.1 has some similarities with the results in[8].However,their results do not cover *** arguments depend on the positive definiteness of the Hessian matrix of the phase function,while our phase functions are degenerate.

关键词： Pointwise convergence finite type decoupling reduction of dimension arguments

Optimal Investment with Multiple Risky Assets for an Insurer with Modified Periodic Risk Process

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Journal of Systems Science & Complexity 2015年第4期28卷 997-1014页

作者： zhao hui RONG Ximin School of Science Tianjin University

This paper considers the optimal investment problem for an insurer in the sense of maximizing the adjustment coefficient of the risk *** authors propose a modified periodic risk model in which the periodic risk process is perturbed by a standard Brownian *** insurer can invest in multiple risky assets and one risk-free asset and the correlations between the risky assets and the risk process are *** strategy is obtained explicitly,which is a function of time and related to the risk *** effects of market parameters on the optimal strategy are discussed and a numerical example is also given.

关键词： Adjustment coefficient modified periodic risk model multiple risky assets optimalinvestment ruin probability.

Batch process monitoring based on WGNPE–GSVDD related and independent variables

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Chinese Journal of Chemical Engineering 2018年第12期26卷 2549-2561页

作者： Yongyong hui Xiaoqiang zhao College of Electrical and Information Engineering Lanzhou University of Technology Lanzhou 730050China Key Laboratory of Gansu Advanced Control for Industrial Processes Lanzhou University of TechnologyLanzhou 730050China National Experimental Teaching Center of Electrical and Control Engineering Lanzhou University of TechnologyLanzhou 730050China

In many batch processes, there are related or independence relationships among process variables. The traditional monitoring method usually carries out a single statistical model according to the related or independent method, and in the feature extraction there is not fully taken into account the characterization of fault information, it will make the process monitoring ineffective, so a fault monitoring method based on WGNPE(weighted global neighborhood preserving embedding)–GSVDD(greedy support vector data description) related and independent variables is proposed. First, mutual information method is used to separate the related variables and independent variables. Secondly, WGNPE method is used to extract the local and global structures of the related variables in batch process and highlight the fault information, GSVDD method is used to extract the process information of the independent variables quickly and effectively. Finally, the statistical monitoring model is established to achieve process monitoring based on WGNPE and GSVDD. The effectiveness of the proposed method was verified by the penicillin fermentation process.

关键词： Batch process Monitoring Related and independent variables Global-local Support vector data description

A synthetical geoengineering approach to evaluate the largest hydraulic fracturing-induced earthquake in the East Shale Basin, Alberta

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Petroleum Science 2023年第1期20卷 460-473页

作者： Gang hui Zhang-Xin Chen Zheng-Dong Lei zhao-Jie Song Lin-Yang Zhang Xin-ran Yu Fei Gu State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249PR China Department of Chemical and Petroleum Engineering University of CalgaryCalgaryABT2N1N4Canada Research Institute of Petroleum Exploration and Development Beijing10083PR China School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao257000ShandongPR China College of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao266580ShandongPR China

On 2019-03-04,the largest induced earthquake(ML4.18)occurred in the East Shale Basin,Alberta,and the underlying physical mechanisms have not been fully *** paper proposes a synthetical geoengineering methodology to comprehensively characterize this earthquake caused by hydraulic *** on 3D structural,petrophysical,and geomechanical models,an unconventional fracture model is constructed by considering the stress shadow between adjacent hydraulic fractures and the interactions between hydraulic and natural *** poroelastic simulations are conducted to reveal the triggering mechanisms of induced *** is found that four vertical basement-rooted faults were identified via focal mechanisms *** brittleness index(BI)along two horizontal wells has a high magnitude(BI>0.5),indicating the potential susceptibility of rock *** to the presence of overpressure,pre-existing faults in the Duvernay Formation are highly susceptible to fault *** occurrence of the earthquake clusters has been attributed to the fracturing fluid injection during the west 38^(th)-39^(th) stage and east 38^(th) stage *** brittleness,formation overpressure,and large fracturing job size account for the nucleation of earthquake clusters,and unconventional natural-hydraulic fracture networks provide fluid flow pathways to cause fault *** workflow can be used to mitigate potential seismic risks in unconventional reservoirs in other fields.

关键词： Geoengineering Hydraulic fracturing Induced seismicity Fault reactivation Mitigation strategies East Shale Basin

Surface/interface engineering of high-efficiency noble metal-free electrocatalysts for energy-related electrochemical reactions

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Journal of Energy Chemistry 2021年第3期30卷 89-104页

作者： hui zhao Zhong-Yong Yuan School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin 3000350China

To date,much efforts have been devoted to the high-efficiency noble metal-free electrocatalysts for hydrogen-and oxygen-involving energy conversion reactions,due to their abundance,low cost and ***/interface engineering is found to be effective in achieving novel physicochemical properties and synergistic effects in nanomaterials for *** various engineering strategies,heteroatom-doping has been regarded as a most promising method to improve the electrocatalytic performance via the regulation of electronic structure of catalysts,and numerous works were reported on the synthesis method and mechanism investigation of heteroatom-doping electrocatalysts,though the heteroatom-doping can only provide limited active *** of other defects such as vacancies and edge sites and construction of heterostructure have shown to open up a potential avenue for the development of noble metal-free *** addition,surface functionalization can attach various molecules onto the surface of materials to easily modify their physical or chemical properties,being as a promising complement or substitute for offering materials with catalytic *** paper gives the insights into the diverse strategies of surface/interface engineering of the highefficiency noble metal-free electrocatalysts for energy-related electrochemical *** significant advances are *** unique advantages and mechanisms for specific applications are *** current challenges and outlook of this growing field are also discussed.

关键词： Noble metal-free electrocatalysts Electrocatalysis Surface/interface engineering Metal-air battery Overall water splitting

Role of texture before rolling: a research based on texture and magnetic properties of 4.5 wt.% Si non-oriented electrical steel

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Journal of Iron and Steel Research International 2024年第8期31卷 1973-1986页

作者： Yu-fan Wang Guo-qing Zu Shi-cheng Sun Ying Han Wei-wei Zhu hui Wu Yu zhao Xu ran Key Laboratory of Advanced Structural Materials of Ministry of Education Changchun University of TechnologyChangchun 130012JilinChina CRRC Changchun Railway Vehicles Co. Ltd.Changchun 130000JilinChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina School of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia

The evolution of microstructure,texture,and magnetic properties with random texture,near-copper texture,weak near-cube texture,and strong λ fiber(/ND(normal direction))before rolling of non-oriented electrical steel was *** recrystallized hot bands with different textures but similar grain sizes were prepared by pre-annealing at low-temperature and high-temperature normalization *** was observed that the final annealed products exhibited similar recrystallized *** contrast,the final annealed product with more 2 fiber before rolling exhibited a stronger cube *** the fiber before rolling becoming stronger,the proportion of(111)deformed matrices became larger,which could be observed in the early recrystallization *** overwhelmingly dominant 2 orientation nuclei are formed in the(111)deformed matrix and become the dominant ***,the best magnetic properties are obtained in the products with strong 2 fiber before rolling,corresponding to the strong cube texture and low anisotropyparameter.

关键词： Texture before rolling Non-oriented electrical steel-Nucleation Grain growth Magnetic property