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Parameter-driven Level of Detail Derivation Method for Semantic Building Facade Model

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Journal of Geodesy and Geoinformation Science 2024年第3期7卷 57-75页

作者： WANG Yuefeng jiao wei Guangxi Key Laboratory of Spatial Information and Geomatics Guilin University of TechnologyGuilin 541004China College of Geomatics and Geoinformation Guilin University of TechnologyGuilin 541004China College of Environment and Resources Guangxi Normal UniversityGuilin 541006China

The relentless progress in the research of geographic spatial data models and their application scenarios is propelling an unprecedented rich Level of Detail(LoD)in realistic 3D representation and smart *** pursuit of rich details not only adds complexity to entity models but also poses significant computational challenges for model visualization and 3D *** paper introduces a novel method for deriving multi-LOD models,which can enhance the efficiency of spatial computing in complex 3D building ***,we extract multiple facades from a 3D building model(LoD3)and convert them into individual semantic facade *** the utilization of the developed facade layout graph,each semantic facade model is then transformed into a parametric ***,we explore the specification of geometric and semantic details in building facades and define three different LODs for facades,offering a unique ***,an innovative heuristic method is introduced to simplify the parameterized *** rigorous experimentation and evaluation,the effectiveness of the proposed parameterization methodology in capturing complex geometric details,semantic richness,and topological relationships of 3D building models is demonstrated.

关键词： 3D building model multi-Level of Detail(LoD) semantic facade model CityGML 3D GIS

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Microstructure and mechanical properties of hot-rolled V-microalloyed Al-containing medium-Mn steel

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Journal of Iron and Steel Research International 2020年第5期27卷 537-548页

作者： Ming Lei wei-jun Hui jiao-jiao Wang Yong-jian Zhang Xiao-li Zhao School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China

The microstructure and mechanical properties of a V-microalloyed Al-containing medium-Mn steel after hot rolling and intercritical annealing(IA)are *** tested steel exhibits a fne multiphase microstructure consisting of bimodal sizes of ferrite and retained austenite plus considerable amount of fne VC and/or M3C ***-chemical phase analysis shows that about 71.0%of the total V is in VC phase and more than 93%of VC particles is less than 5 *** calculated precipitation strengthening values of VC are^347 and^234 MPa for the specimens intercritically annealed at 625 and 750℃,*** excellent combination of strength and ductility as high as^50 GPa%and yield strength(YS)of 890 MPa was obtained at intercritical temperature(TIA)of 725℃,although it does not correspond to the maximum precipitation strengthening of VC ***,it is suggested that an optimization of TIA corresponding to both excellent combination of strength and ductility and high YS should be further explored through chemical composition and IA process optimization.

关键词： Medium-Mn steel Vanadium Intercritical annealing Microstructure Mechanical property

Thermodynamic studies on gas-based reduction of vanadium titano-magnetite pellets

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International Journal of Minerals,Metallurgy and Materials 2019年第7期26卷 822-830页

作者： Jun-wei Chen Yang jiao Xi-dong Wang Department of Energy and Resources Engineering College of Engineering Peking University

Numerous studies have focused on the reduction thermodynamics of ordinary iron ore;by contrast, the literature contains few thermodynamic studies on the gas-based reduction of vanadium titano-magnetite (VTM) in mixed atmospheres of H2, CO, H2O, CO2, and N2. In this paper, thermodynamic studies on the reduction of oxidized VTM pellets were systematically conducted in an atmosphere of a C–H–O system as a reducing agent. The results indicate that VTM of an equivalent valence state is more difficult to reduce than ordinary iron ore. A reduction equilibrium diagram using the C–H–O system as a reducing agent was obtained;it clearly describes the reduction process. Experiments were performed to investigate the effects of the reduction temperature, the gas composition, and two types of iron ores on the reduction of oxidized VTM pellets. The results show that the final reduction degree increases with increasing reduction temperature, increasing molar ratio of H2/(H2 + CO), and decreasing H2O, CO2, and N2 contents. In addition, the reduction processes under various conditions are discussed. All of the results of the reduction experiments are consistent with those of theoretical thermodynamic analysis. This study is expected to provide valuable thermodynamic theory on the industrial applications of VTM.

关键词： vanadium titano-magnetite gas-based reduction C-H-O system thermodynamics

Equitable Presentations for Multiparameter Quantum Groups

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Acta Mathematica Sinica,English Series 2021年第10期37卷 1560-1572页

作者： Nai hong HU Yu Feng PEI jiao ZHANG School of Mathematical Sciences SKLPMMPEast China Normal UniversityShanghai 200241P.R.China Department of Mathematics Shanghai Normal UniversityShanghai 200234P.R.China Department of Mathematics Shanghai UniversityShanghai 200444P.R.China

In this paper, we give an equitable presentation for the multiparameter quantum group associated to a symmetrizable Kac–Moody Lie algebra, which can be regarded as a natural generalization of the Terwilliger's equita... 详细信息

关键词： Quantum groups equitable presentation Hopf algebras

Blue carbon on the rise:challenges and opportunities

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National Science Review 2018年第4期5卷 464-468页

作者： Nianzhi jiao hong Wang Guanhua Xu Salvatore Aricò State Key Laboratory of Marine Environmental Science Xiamen University State Ocean Administration Ministry of Science and Technology China Intergovernmental Oceanographic Commission of United Nations Educational Scientific and Cultural Organization (UNESCO)

BLUE CARBON ON THE RISE Climate change is a global concern that requires urgent *** a signatory to the Paris Agreement,China has committed to have its greenhouse gas emission reach a peak by the year 2030,which means ... 详细信息

关键词： Blue carbon on the rise:challenges and opportunities

Ab initio study on crystal structure and phase stability of ZrC_(2) under high pressure

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Chinese Physics B 2021年第1期30卷 350-358页

作者： Yong-Liang Guo Jun-hong wei Xiao Liu Xue-Zhi Ke Zhao-Yong jiao School of Science and Henan Key Laboratory of Wire and Cable Structures and Materials Henan Institute of TechnologyXinxiang 453003China School of Physics Henan Normal UniversityXinxiang 453007China School of Physics and Electronic Science East China Normal UniversityShanghai 200241China

The structural stabilities and crystal evolution behaviors of the hyper stoichiometric compound ZrC_(2)(carbon rich;C/Zr> 1.0) are studied under ambient and high pressure conditions using first-principles calculations in combination with the particle-swarm optimization *** viable structures of ZrC_(2) in P21/c,Cmmm,Cmc2_(1),P4_(2)/nmc,Immm and P6/mmm symmetries are *** structures are dynamically stable as their phonon spectra have no imaginary modes at zero pressure or at the selected high-pressure *** them,the P21/c phase represents the ground state structure,whereas P21/c,P4_(2)/nmc,Immm and P6/mmm phases are part of the phase transition *** phase order and critical pressures of the phase transition are determined to be approximately 300 GPa according to the equation of states and ***,the mechanical and electronic properties are *** P21/c and Cmc2_(1) phases display a semi-metal nature,whereas the P4_(2)/nmc,Immm,P6/mmm and Cmmm phases exhibit a metallic ***,the present study reveals considerable information regarding the structural,mechanical and electronic properties of ZrC_(2),thereby providing key insights into its material properties and evaluating its behavior in practical applications.

关键词： crystal structure phase transition mechanical property electronic band first-principles calculation

习近平关于全面深化改革重要论述的原创性贡献

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学习论坛 2025年第1期 5-13页

作者：张家臻李蕉清华大学马克思主义学院北京100084

党的十八大以来,习近平围绕全面深化改革发表了一系列重要论述,以大历史观的宏大视野系统揭示了全面深化改革的历史逻辑、理论逻辑和实践逻辑,科学阐明了全面深化改革的基本思路、重要原则和科学方法,创造性提出了发展新质生产力和深化... 详细信息

党的十八大以来,习近平围绕全面深化改革发表了一系列重要论述,以大历史观的宏大视野系统揭示了全面深化改革的历史逻辑、理论逻辑和实践逻辑,科学阐明了全面深化改革的基本思路、重要原则和科学方法,创造性提出了发展新质生产力和深化相关领域体制机制改革的重要思想,创新发展了马克思主义唯物史观的思想方法和基本原理,丰富拓展了马克思主义唯物史观关于生产力和生产关系及其辩证关系的理论内涵;在社会主义发展史上第一次形成了全面深化改革的系统理论,实现了在社会主义市场经济条件下政府与市场关系理论的重大突破,创造性继承和发展了马克思主义关于社会主义社会的改革思想;科学阐明了全面深化改革的目标任务、价值取向和跳出历史周期率的实践要求,丰富了马克思主义国家学说的思想内涵和核心要义,指明了防止国家由“社会公仆”蜕变为“社会主人”的现实路径。

关键词：全面深化改革唯物史观国家学说原创性贡献

Effects of micro-alloying and production process on precipitation behaviors and mechanical properties of HRB600

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Journal of Iron and Steel Research International 2017年第5期24卷 536-543页

作者： hong-bo Pan Meng-jiao Zhang wei-ming Liu Jun Yan Hui-ting Wang Chang-sheng Xie Zhan Guo Key Laboratory of Metallurgical Emission Reduction & Resources Recycling of Ministry of Education Anhui University of Technology Ma'anshan 243002 Anhui China Anhui Province Key Laboratory of Metallurgy Engineering & Resources Recycling Anhui University of Technology Ma'anshan 243002 Anhui China School of Metallurgical Engineering Anhui University of Technology Ma'anshan 243002 Anhui China Technology Center Ma'anshan Iron & Steel Company Limited Ma'anshan 243000 Anhui China

Effects of micro-alloying elements and production process on microstructure, mechanical properties and precipitates of 600 MPa grade rebars were studied by using pilot test, metallographic observa- tion, tensile test, thermodynamic calculation and transmission electron microscopy. The results show that the tested steels are composed of ferrite and pearlite, in which the conterlt range of pearlite is 33%-45%. For vanadium micro-alloyed steel, interphase preeipitation Strengthening effect of V can be promoted and the yield strength of tested steels can be increased with increasing V content and de- creasing finishing rolling temperature. The temperature of terminated cooling should be more than 700 ℃ when the water cooling is used. When niobium is added to the steel, more coarse （Nb,V）C,N precipitates are generated at high temperature, so that the solid solubility of precipitated phases of vanadium is reduced and the precipitation strengthening effect of vanadium is weakened.

关键词： Micro-alloying High-strength steel rebar Thermo-mechanical controlling process Mechanical property Precipitation strengthening Thermodynamics

A method for evaluating paleo hydrocarbon pools and predicting secondary reservoirs:a case study of the Sangonghe Formation in the Mosuowan area,Junggar Basin

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Petroleum Science 2018年第2期15卷 252-269页

作者： wei-jiao Ma Yan-Zhao wei Shi-Zhen Tao School of Earth and Space Sciences Peking UniversityBeijing 100871China Research Institute of Petroleum Exploration and Development Beijing 100083China

Taking the Jurassic Sangonghe Formation in the Mosuowan-Mobei area of the Junggar Basin as an example, this paper provides a method that evaluates paleo hydrocarbon pools and predicts secondary reservoirs. Through Quantitative Grain Fluorescence （QGF） experiments, well-tie seismic correlation, and paleo structure analysis, the scale and distribution of paleo hydrocarbon pools in the study area are outlined. Combining current structural features and fault characteristics, the re-migration pathways of paleo oil and gas are depicted. Based on barrier conditions on the oil re-migration pathways and current reservoir distribution, we recognize three types of secondary reservoirs. By analyzing structural evolution and sand body-fault distribution, the major control factors of secondary reservoirs are specified and, consequently, favorable zones for secondary reservoirs are predicted. The results are mainly as follows. （1） In the primary accumulation period in the Cretaceous, paleo hydrocarbon pools were formed in the Sangonghe Formation of the Mosuowan uplift and their size and distribution were extensive and the exploration potential for secondary reservoirs should not be ignored. Besides, paleo reservoirs were also formed in the Mobei uplift, but just small scale. （2） In the adjustment period in the Neogene, traps were reshaped or destroyed and so were the paleo reservoirs, resulting in oil release. The released oil migrated linearly northward along the structural highs of the Mobei uplift and the Qianshao low-relief uplift and then formed secondary reservoirs when it met new traps. In this process, a structural ridge cooperated with sand bodies and faults, applying unobstructed pathways for oil and gas re-migration. （3） The secondary hydrocarbon pools are classified into three types： low-relief anticlinal type, lithologic pinch-out type and fault block type. The distribution of the first type is controlled by a residual low uplift in the north flank of the paleo-anticl

关键词： Junggar Basin Paleo hydrocarbon pools Hydrocarbon re-migration pathways Secondary reservoirs .Favorable zones