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Journal of Modern Power Systems and Clean Energy 2022年第3期10卷 577-587页

作者： Jingwei Hu Xiaoyuan Xu hongyan ma Zheng Yan Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education Shanghai Jiao Tong UniversityShanghaiChina Donghua University Shanghai 201620China

Transmission network expansion can significantly improve the penetration level of renewable ***,existing studies have not explicitly revealed and quantified the trade-off between the investment cost and penetration level of renewable *** paper proposes a distributionally robust optimization model to minimize the cost of transmission network expansion under uncertainty and maximize the penetration level of renewable *** proposed model includes distributionally robust joint chance constraints,which maximize the minimum expectation of the renewable utilization probability among a set of certain probability distributions within an ambiguity *** proposed formulation yields a twostage robust optimization model with variable bounds of the uncertain sets,which is hard to *** applying the affine decision rule,second-order conic reformulation,and duality,we reformulate it into a single-stage standard robust optimization model and solve it efficiently via commercial *** studies are carried on the Garver 6-bus and IEEE 118-bus systems to illustrate the validity of the proposed method.

关键词： Affine decision rule distributionally robust optimization joint chance constraint renewable generation transmission network expansion planning

Adsorption of cyclohexene and its dehydrogenation intermediates on nAu/Pt(100)(n = 0, 1, 2) surfaces: A DFT study

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Journal of Natural Gas Chemistry 2011年第1期20卷 34-40页

作者： hongyan ma Wenge Xu Zhenfeng Shang Guichang Wang Department of Chemistry and the Center of Theoretical and Computational Chemistry Nankai University Tianfin 300071 China College of Chemistry and Environmental Science Shanxi Datong University Datong 037009 Shanxi China

Adsorption of cyclohexene and its dehydrogenation intermediates on the nAu/Pt（100）（n = 0, 1, 2 means clean Pt, one monolayer and two layers of Au covered Pt surfaces, respectively.） has been investigated by self-consistent （GGA-PW91） density functional theory combined with periodic slab model. It is found that on the clean platinum, there are two kinds of favorable adsorption sites, i.e., hollow sites and bridge sites, and the adsorption energy at the hollow site is larger than that at the bridge site. However, on the Au/Pt and 2Au/Pt surfaces, there are three kinds of adsorption sites, and the adsorption energies are alike at both the bridge site and the top site. The magnitude order of the adsorption energies is as follows： clean Pt Au/Pt 2Au/Pt. The configurations of cyclohexene molecule have been distorted a little during the geometry optimizations. The lengths of C–M （M = Pt or Au, on the top layer of the slab） bonds are closely related to the corresponding adsorption energies.

关键词： cyclohexene dehydrogenation intermediates nAu/Pt(100) adsorption density functional theory

Research on Electricity Consumption Model of Library Building Based on Data Mining

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Energy Engineering 2022年第6期119卷 2407-2429页

作者： Jiaming Dou hongyan ma Rong Guo School of Electrical and Information Engineering Beijing University of Civil Engineering and ArchitectureBeijing102616China Institute of Distributed Energy Storage Safety Big Data Beijing University of Civil Engineering and ArchitectureBeijing102616China Beijing Key Laboratory of Intelligent Processing for Building Big Data Beijing102616China

With the exponential development of Chinese population,the massive energy consumption of buildings has recently become an interest *** much research has been conducted on residential buildings,heating ventilation and air conditioning(HVAC),little research has been conducted on the relationship between student’s behavior,campus buildings,and their *** classical seasonal decomposition,hierarchical clustering,and apriori algorithm,this paper aims to provide an empirical model for consumption data in campus *** meter data from a library in Beijing,China,is adopted in this *** electricity consumption patterns are investigated on an hourly/daily/monthly *** to the monthly analysis,electricity consumption peaks each year around June and December due to teaching programs,social exams,and outdoor *** data analysis revealed a relatively stable consumption *** shows three different types of daily load *** data analysis demonstrated a high relationship between HVAC consumption and building total consumption,with a lift value of ***,links between temperature and subsystems were also *** a case study of library,this study provides a unique insight into campus electricity *** results could help to develop operational strategies for campus facilities.

关键词： Electricity consumption data mining load profile campus building

Analysis and Optimization of Ancient Building Lighting Based on DIALux 32

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Analysis and Optimization of Ancient Building Lighting Based...

Boosting hydrogen storage performance in COF-108 by single-walled carbon nanotube insertion, boron substitution,and lithium doping at room temperature

第32届中国控制与决策会议

作者： Dou Jiaming ma hongyan Beijing University of Civil Engineering and Architecture Beijing Key Laboratory of Intelligent Processing for Building Big Data

ISBN: (数字)9781728158556

ISBN: (纸本)9781728158563

In order to provide a better interior visual experience for visitors in ancient buildings, insufficient illumination and non-uniformity need to be solved urgently. DIALux software is used to simulate an ancient building to find out its problems, like non-uniformity and north-east corner illumination lack. By the use of controlling variable method, six different cases were proposed to optimize the lighting environment. The results show that case 3 and case 4 are chosen as the best cases to solve the defects. It is verified that the overall environment has better illumination and uniformity.

关键词： Ancient Building Lighting Environment Optimization DIALux

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Science China Technological Sciences 2024年第12期67卷 3791-3800页

作者： MENG ZhaoShun ma hongyan WANG Qing YANG Xiao WANG YunHui LI XingAo Jiangsu Provincial Engineering Research Center of Low-Dimensional Physics and New Energy & College of Science Nanjing University of Posts and Telecommunications

A novel hybrid material based on covalent organic frameworks（COFs） was proposed for highly efficient hydrogen（H2） storage at room temperature. Single-walled carbon nanotubes（SWNTs） were inserted into COF-108, and additional lithium（Li） atoms were doped into the boron-substituted structures. Density functional theory calculations were used to determine the optimized hybrid structures and the reasonable force field parameters between the hydrogen in H2and the elements in the sorbent. In addition, H2adsorption simulations via the grand canonical Monte Carlo approach revealed that SWNT insertion and Li doping substantially elevated the room-temperature H2storage performance. A detailed analysis was provided on the impact of the number of doped Li atoms and the specific surface area on H2uptake. The highest excess gravimetric and volumetric H2uptake values were 5.08 wt% and 31.65 g/L, respectively, for Li-doped B-substituted SWNT（15,0）@COF-108 and SWNT（9,9）@COF-108 at 298 K and 100 bar. Surprisingly, the total H2uptake of Li-doped B-substituted SWNT（9,9）@COF-108 not only met but also surpassed the 2020 target of the U.S. Department of Energy（DOE） within the temperature and pressure limits of the *** study presents a theoretically grounded, multiple modification strategy for the design of porous materials with exceptional H2storage capabilities, offering a promising avenue for the development of advanced H2storage solutions.

关键词： hydrogen storage COF-108 single-walled carbon nanotube insertion boron substitution lithium doping density functional theory calculation grand canonical Monte Carlo simulation

Fusion mode of multi-type scientific and technological information and its application

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High Technology Letters 2024年第4期30卷 433-440页

作者： ZENG Wen LIU Xiaolin ma hongyan Institute of Scientific and Technical Information of China Beijing 100038P.R.China

The development of network and information technology has brought changes to the production environment of scientific and technological information,leading to the integration of multi-type scien-tific and technological information,which has become one of the primary research focuses in the cur-rent field of scientific and technological information *** article proposes a basic mode to realize the fusion of multi-type scientific and technological information,expounds the corresponding basic construction method,and applies it to the scientific and technological topics identification in the field of artificial intelligence(AI).The research results show that the multi-type scientific and technological information fusion mode proposed in this article has certain feasibility in specific appli-cation scenarios,which lays a foundation for the subsequent research work.

关键词： information fusion scientific and technological information fusion mode fusion method

LiFePO_(4)/C cathode materials synthesized by co-precipitation and microwave heating

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Frontiers of Chemical Science and Engineering 2008年第4期2卷 422-427页

作者： Yunlong XU Lili TAO hongyan ma Huaqing HUANG Key Laboratory for Ultrafine materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

LiFePO_(4)/C cathode materials were synthesized by a combination of co-precipitation and microwave heat-ing using polyethylene glycol(PEG)as a carbon resource and the influence of microwave heating time on the struc-ture and electrochemical performance of the materials was also *** samples were characterized by X-ray diffraction(XRD),TEM,particle-size analysis and con-stant current charge-discharge *** results show that the LiFePO_(4)/C heated for 9 min has a pure olive-type phase and excellent electrochemical *** initial discharge capacities of this sample are 154.3,139.7,123.9 mah/g at the rates 0.1C,0.2C,1C at room temperature,respectively,and after 20 cycles remain 152.3,134.3,118.5 mah/g,respectively.

关键词： lithium-ion battery cathode materials LiFePO_(4)/C microwave heating

Effects of transient temperature gradient on frost heave of saturated silty clay in an open system

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Research in Cold and Arid Regions 2023年第6期15卷 268-277页

作者： hongyan ma YuanFang Cui JianQiao Zhang Song Li Song Xu College of Civil Engineering Fuzhou UniversityFuzhouFujian 350108China Yunnan Construction and Investment Holding Co. LtdKunmingYunnan 650501China Ningbo Communications Planning Institute Co. LtdNingboZhejiang 315192China

Frost heave in seasonally frozen regions is a one-dimensional process that could severely damage infrastructure *** state,temperature and water migration are important factors for frost *** work investigated the effects of soil temperature and volumetric water content on the transient frost heave ratio during the freezing of saturated silty clay in an open system and analyzed the relationships between the transient frost heave ratio and freezing rate and between temperature gradient and frost heave *** results show that the frost heave ratio,frost heave rate,and freezing rate are positively correlated with the temperature gradient since the temperature gradient drives the water migration during freezing,indicating the transient temperature gradient could be used to evaluate the frost heave of saturated silty *** transient freezing rate and transient frost heave ratio are logarithmically related to the transient frost heave ratio and transient temperature gradient,*** effects of transient temperature gradient on frost heave are the principal mechanism responsible for different frost heave characteristics and uneven frost heave along a subgrade of the same soil type.

关键词： Saturated silty clay Frost heave Transient temperature gradient Frost heave ratio Frost heave rate

Determination of allowable subgrade frost heave with the pavement roughness index in numerical analysis

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Research in Cold and Arid Regions 2015年第5期7卷 587-593页

作者： hongyan ma Feng Zhang DeCheng Feng Bo Lin School of Transportation Science and Engineering Harbin Institute of Technology

Frost heave is an upward swelling of soil during cryogenic conditions in cold regions. It is caused by the accumulation of ice crystals in subgrade soil, which grow upwards when freezing temperatures penetrate into the subgrade. This study establishes the allowable soil subgrade frost heave based on the roughness standard of asphalt pavement in China, and aims to balance the pavement design and frost heave resistance of subgrades in cold regions. We formulated a mechanical model of pavement supported by the boundary conditions of differential frost heave, based on the elastie layered system theory. The differential soil subgrade frost heave was modeled as a sinusoidal function, and the allowable frost heave and the roughness index were modeled as the displacement boundaries for the top and bottom of the pavement structure. Then the allowable frost heave was back-calculated according to the roughness standard. Numerical results show that the allowable frost heave depends on the pavement structure, material properties, the highway grade, and other factors. In order to ensure that the actual soil subgrade frost heave is lower than the allowable frost heave, pavement structures and materials need to be selected and designed carefully. The numerical method proposed here can be applied to establish the frost heave re- sistance of subgrade when the pavement structure and materials are determined.

关键词： differential frost heave asphalt pavement elastic layered system theory roughness index allowable frost heave

Durability of calcium sulfoaluminate cement concrete

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2020年第2期21卷 118-128页

作者： Bowen TAN Monday UOKORONKWO Aditya KUmaR hongyan ma Department of Civil Architectural and Environmental EngineeringMissouri University of Science and TechnologyRollaMO 65401USA Department of Chemical and Biochemical Engineering Missouri University of Science and TechnologyRollaMO 65401USA Department of materials Science and Engineering Missouri University of Science and TechnologyRollaMO 65401USA

Calcium sulfoaluminate cement(CSAC),first developed in China in the 1970 s,has received significant attention because of its expansive(or shrinkage-compensating)and rapid-hardening characteristics,low energy-intensity,and low carbon *** production and hydration of CSAC(containing ye’elimite,belite,calcium sulfate,and minors)have been extensively studied,but aspects of its durability are not well *** to its composition and intrinsic characteristics,CSAC concrete is expected to have better performance than Portland cement(PC)concrete in several aspects,including shrinkage and cracking due to restrained shrinkage,freeze-thaw damage,alkali-silica reaction,and sulfate ***,there is a lack of consensus among researchers regarding transport properties,resistance to carbonation,and steel corrosion protectiveness of CSAC concrete,all of which are expected to be tied to the chemical composition of CSAC and attributes of the service *** example,CASC concrete has poorer resistance to carbonation and chloride penetration compared with its PC counterpart,yet some studies have suggested that it protects steel rebar well from corrosion when exposed to a marine tidal zone,because of a strong self-desiccation *** paper presents a succinct review of studies of the durability of CSAC *** suggest that more such studies should be conducted to examine the long-term performance of the material in different service *** emphasis should be given to carbonation and steel rebar corrosion,so as to reveal the underlying deterioration mechanisms and establish means to improve the performance of CSAC concrete against such degradation processes.

关键词： Calcium sulfoaluminate cement(CSAC) Durability Carbonation Chloride Steel corrosion