Space metallurgy is an interdisciplinary field that combines planetary space science and metallurgical engineering.It involves systematic and theoretical engineering technology for utilizing planetary resources in sit...Space metallurgy is an interdisciplinary field that combines planetary space science and metallurgical engineering.It involves systematic and theoretical engineering technology for utilizing planetary resources in situ.However,space metallurgy on the Moon is challenging because the lunar surface has experienced space weathering due to the lack of atmosphere and magnetic field,making the mi-crostructure of lunar soil differ from that of minerals on the Earth.In this study,scanning electron microscopy and transmission electron microscopy analyses were performed on Chang’e-5 powder lunar soil samples.The microstructural characteristics of the lunar soil may drastically change its metallurgical performance.The main special structure of lunar soil minerals include the nanophase iron formed by the impact of micrometeorites,the amorphous layer caused by solar wind injection,and radiation tracks modified by high-energy particle rays inside mineral crystals.The nanophase iron presents a wide distribution,which may have a great impact on the electromagnetic prop-erties of lunar soil.Hydrogen ions injected by solar wind may promote the hydrogen reduction process.The widely distributed amorph-ous layer and impact glass can promote the melting and diffusion process of lunar soil.Therefore,although high-energy events on the lun-ar surface transform the lunar soil,they also increase the chemical activity of the lunar soil.This is a property that earth samples and tradi-tional simulated lunar soil lack.The application of space metallurgy requires comprehensive consideration of the unique physical and chemical properties of lunar soil.展开更多
The paper presents a discussion on the emergence and development of metallurgical systems engineering on the account of the history and development of modern metallurgy. The contents, characteristics, methodology and ...The paper presents a discussion on the emergence and development of metallurgical systems engineering on the account of the history and development of modern metallurgy. The contents, characteristics, methodology and applications of metallurgical systems engineering are also addressed.展开更多
After nearly one hundred years of research, metallurgy(metallurgical science and engineering) has gradually become a system with three levels of knowledge:(1) micro metallurgy at the atomic/molecular scale,(2) process...After nearly one hundred years of research, metallurgy(metallurgical science and engineering) has gradually become a system with three levels of knowledge:(1) micro metallurgy at the atomic/molecular scale,(2) process metallurgy at the procedure/device, and(3) macrodynamic metallurgy at the full process/process group. Macro-dynamic metallurgy development must eliminate the concept of an "isolated system" and establish concepts of "flow," "process network," and "operating program" to study the "structure–function–efficiency" in the macrodynamic operation of metallurgical manufacturing processes. It means considering "flow" as the ontology and observing dynamic change by"flow" to solve the green and intelligent potential of metallurgical enterprises. Metallurgical process engineering is integrated metallurgy, toplevel designed metallurgy, macro-dynamic operated metallurgy, and engineering science level metallurgy. Metallurgical process engineering is a cross-level, comprehensive, and integrated study of the macro-dynamic operation of manufacturing processes. Metallurgical process engineering studies the physical nature and constitutive characteristics of the dynamic operation of steel manufacturing process, as well as the analysis-optimization of the set of procedure functions, coordination-optimization of the set of procedures' relations, and reconstruction-optimization of the set of procedures in the manufacturing process. The study establishes rules for the macro operation of the manufacturing process, as well as dynamic and precise objectives of engineering design and production operation.展开更多
Chongqing University is located inChongqing City,Sichuan Province.Foundedoriginally in 1929,the university has sincethen greatly expanded in its scope ofeducation and organization.Now it becomesone of China’s key uni...Chongqing University is located inChongqing City,Sichuan Province.Foundedoriginally in 1929,the university has sincethen greatly expanded in its scope ofeducation and organization.Now it becomesone of China’s key universities of scienceand engineering with 18 departments and38 specialities.In addition it has 20 researchinstitutes and about one hundred laboratories.The department of metallurgy and ma-terials engineering of Chongqing University展开更多
The main objective of this paper is to study the mechanical properties of a material formulated in the laboratory which is a GS （gravel slag） based on crushed aggregates treated with metallurgical waste which is the...The main objective of this paper is to study the mechanical properties of a material formulated in the laboratory which is a GS （gravel slag） based on crushed aggregates treated with metallurgical waste which is the blast furnace slag. The authors show in particular, as a road application, the treatment of gravel slag provides mechanical properties allowing its use in road construction. We will introduce different contents of slag （10%, 15%, 20%, 25% and 30%） and test the mechanical properties of the mixtures obtained through CBR Punching tests, simple compression test and tensile test. This work is in the context of the valorization of blast furnace slag, which is found in large quantities as waste dumps that came to disturb the environment.展开更多
对恶劣环境下钢包运行动作姿态信息的有效感知是钢铁安全生产管控智能化需要解决的重要问题。总结钢包运行的时序信息特征,将钢包运行时的复杂安全信息分解为一系列可识别的基础动作,在此基础上构建钢包动作识别数据集。选用时序动作检...对恶劣环境下钢包运行动作姿态信息的有效感知是钢铁安全生产管控智能化需要解决的重要问题。总结钢包运行的时序信息特征,将钢包运行时的复杂安全信息分解为一系列可识别的基础动作,在此基础上构建钢包动作识别数据集。选用时序动作检测模型识别钢包动作信息,并根据钢包运行的视觉特性及精准定位需求将原网络目标检测分支替换为改进后的你只看一次(You Only Look Once,YOLOv8)图像分割模型。试验结果表明,改进后的模型所占存储容量减少63.98%,计算需求降低40.6%;识别准确率和召回率分别提高了0.95%与0.51%,且mAP50达到98.6%,能满足钢包实时精准定位的需求。改进后的时序动作检测模型各类动作平均识别准确率达到87.44%。研究表明,所提出时空动作检测改进模型能有效检测复杂环境内钢包的位置信息与基础动作信息,可以满足钢包复杂工序识别、目标追踪、碰撞预警、倾覆洞穿预警等安全检测任务的需求,降低安全管控所需的人力物力成本。展开更多
基金CNSA for providing access to the lunar sample CE5C0200YJFM00302funding support from the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB 41000000)+5 种基金the National Natural Science Foundation of China (Nos. 42273042 and 41931077)the Youth Innovation Promotion Association Chinese Academy of Sciences (No. 2020395)Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Nos. ZDBS-SSW-JSC00710 and QYZDY-SSW-DQC028)the Young and Middleaged Academic Technology Leader Reserve Talent Project of Yunnan Province (No. 2018HB009)the Science Fund for Outstanding Youth of Yunnan Province (No. 202101 AV070007)the "From 0 to 1" Original Exploration Cultivation Project, Institute of Geochemistry, Chinese Academy of Sciences (No. DHSZZ2023-3)
文摘Space metallurgy is an interdisciplinary field that combines planetary space science and metallurgical engineering.It involves systematic and theoretical engineering technology for utilizing planetary resources in situ.However,space metallurgy on the Moon is challenging because the lunar surface has experienced space weathering due to the lack of atmosphere and magnetic field,making the mi-crostructure of lunar soil differ from that of minerals on the Earth.In this study,scanning electron microscopy and transmission electron microscopy analyses were performed on Chang’e-5 powder lunar soil samples.The microstructural characteristics of the lunar soil may drastically change its metallurgical performance.The main special structure of lunar soil minerals include the nanophase iron formed by the impact of micrometeorites,the amorphous layer caused by solar wind injection,and radiation tracks modified by high-energy particle rays inside mineral crystals.The nanophase iron presents a wide distribution,which may have a great impact on the electromagnetic prop-erties of lunar soil.Hydrogen ions injected by solar wind may promote the hydrogen reduction process.The widely distributed amorph-ous layer and impact glass can promote the melting and diffusion process of lunar soil.Therefore,although high-energy events on the lun-ar surface transform the lunar soil,they also increase the chemical activity of the lunar soil.This is a property that earth samples and tradi-tional simulated lunar soil lack.The application of space metallurgy requires comprehensive consideration of the unique physical and chemical properties of lunar soil.
文摘The paper presents a discussion on the emergence and development of metallurgical systems engineering on the account of the history and development of modern metallurgy. The contents, characteristics, methodology and applications of metallurgical systems engineering are also addressed.
文摘After nearly one hundred years of research, metallurgy(metallurgical science and engineering) has gradually become a system with three levels of knowledge:(1) micro metallurgy at the atomic/molecular scale,(2) process metallurgy at the procedure/device, and(3) macrodynamic metallurgy at the full process/process group. Macro-dynamic metallurgy development must eliminate the concept of an "isolated system" and establish concepts of "flow," "process network," and "operating program" to study the "structure–function–efficiency" in the macrodynamic operation of metallurgical manufacturing processes. It means considering "flow" as the ontology and observing dynamic change by"flow" to solve the green and intelligent potential of metallurgical enterprises. Metallurgical process engineering is integrated metallurgy, toplevel designed metallurgy, macro-dynamic operated metallurgy, and engineering science level metallurgy. Metallurgical process engineering is a cross-level, comprehensive, and integrated study of the macro-dynamic operation of manufacturing processes. Metallurgical process engineering studies the physical nature and constitutive characteristics of the dynamic operation of steel manufacturing process, as well as the analysis-optimization of the set of procedure functions, coordination-optimization of the set of procedures' relations, and reconstruction-optimization of the set of procedures in the manufacturing process. The study establishes rules for the macro operation of the manufacturing process, as well as dynamic and precise objectives of engineering design and production operation.
文摘Chongqing University is located inChongqing City,Sichuan Province.Foundedoriginally in 1929,the university has sincethen greatly expanded in its scope ofeducation and organization.Now it becomesone of China’s key universities of scienceand engineering with 18 departments and38 specialities.In addition it has 20 researchinstitutes and about one hundred laboratories.The department of metallurgy and ma-terials engineering of Chongqing University
文摘The main objective of this paper is to study the mechanical properties of a material formulated in the laboratory which is a GS （gravel slag） based on crushed aggregates treated with metallurgical waste which is the blast furnace slag. The authors show in particular, as a road application, the treatment of gravel slag provides mechanical properties allowing its use in road construction. We will introduce different contents of slag （10%, 15%, 20%, 25% and 30%） and test the mechanical properties of the mixtures obtained through CBR Punching tests, simple compression test and tensile test. This work is in the context of the valorization of blast furnace slag, which is found in large quantities as waste dumps that came to disturb the environment.
文摘对恶劣环境下钢包运行动作姿态信息的有效感知是钢铁安全生产管控智能化需要解决的重要问题。总结钢包运行的时序信息特征,将钢包运行时的复杂安全信息分解为一系列可识别的基础动作,在此基础上构建钢包动作识别数据集。选用时序动作检测模型识别钢包动作信息,并根据钢包运行的视觉特性及精准定位需求将原网络目标检测分支替换为改进后的你只看一次(You Only Look Once,YOLOv8)图像分割模型。试验结果表明,改进后的模型所占存储容量减少63.98%,计算需求降低40.6%;识别准确率和召回率分别提高了0.95%与0.51%,且mAP50达到98.6%,能满足钢包实时精准定位的需求。改进后的时序动作检测模型各类动作平均识别准确率达到87.44%。研究表明,所提出时空动作检测改进模型能有效检测复杂环境内钢包的位置信息与基础动作信息,可以满足钢包复杂工序识别、目标追踪、碰撞预警、倾覆洞穿预警等安全检测任务的需求,降低安全管控所需的人力物力成本。
