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TSC prediction and dynamic control of BOF steelmaking with state-of-the-art machine learning and deep learning methods

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Journal of Iron and Steel Research International 2024年第1期31卷 174-194页

作者： Tian-yi Xie cai-dong Zhang Quan-lin Zhou Zhi-qiang Tian Shuai Liu Han-jie Guo Material Technology Research Institute Hesteel GroupShijiazhuang050023HebeiChina Tangsteel Company Hesteel GroupTangshan063611HebeiChina School of Artificial Intelligence Beijing Technology and Business UniversityBeijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

Mathematical(data-driven)models based on state-of-the-art(SOTA)machine learning and deep learning models and data collected from 12,786 heats were established to predict the values of temperature,sample,and carbon(TSC)test,including temperature of molten steel(TSC-Temp),carbon content(TSC-C)and phosphorus content(TSC-P),which made prepa-ration for eliminating the TSC *** maximize the prediction accuracy of the proposed approach,various models with different inputs were implemented and compared,and the best models were applied to the production process of a Hesteel Group steelmaking plant in China in the *** number of tabular features(hot metal information,scrap,additives,blowing practices,and preset values)was expanded,and time series(off-gas profiles and blowing practice curves)that could reflect the entire steelmaking process were introduced as ***,the latest machine learning models(LightGBM,CatBoost,TabNet,and NODE)were used to make predictions with tabular features,and the best coefficient of determination R^(2)values obtained for TSC-P,TSC-C and TSC-Temp predictions were 0.435(LightGBM),0.857(Cat-Boost)and 0.678(LightGBM),respectively,which were higher than those of classic models(backpropagation and support vector machine).Then,making predictions was performed by using SOTA time series regression models(SCINet,DLinear,Informer,and MLSTM-FCN)with original time series,SOTA image regression models(NesT,caiT,ResNeXt,and GoogLeNet)with resized time series,and the proposed Concatenate-Model and Parallel-Model with both tabular features and time *** optimization and comparisons,it was finally determined that the Concatenate-Model with MLSTM-FCN,SCINet and Informer as feature extractors performed the best,and its R^(2)values for predicting TSC-P,TSC-C and TSC-Temp reached 0.470,0.858 and 0.710,*** field test accuracies for TSC-P,TSC-C and TSC-Temp were 0.459,0.850 and 0.685,respectively.A related importance analysis was carri

关键词： BOF steelmaking In-blow prediction TSC test Machine learning Deep learning Field application

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Natural products inspired[3+2]cycloaddition enables efficient construction of hydroxylated tetrahydrofuran acetals and concise syntheses of lignans

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Science China Chemistry 2024年第7期67卷 2306-2313页

作者： dong-Yue cai Weiming Shi Zhao-Hui Jin Zhi-Xiang Yu Jin-Xin Zhao Jian-Min Yue State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China Beijing National Laboratory for Molecular Sciences(BNLMS) Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of ChemistryPeking UniversityBeijing 100871China

Mimicking biosynthetic pathways of hongkonoids led to the development of a new Cu(Ⅰ)-catalyzed[3+2]cycloaddition ofα-hydroxyketone andβ-keto enol ethers,affording tetrahydrofuran acetals in a highly diastereoselective manner and 100%atom *** studies on the mechanism disclosed a concerted but asynchronous Michael addition/aldol *** the same importance,this methodology provides a practical biomimetic approach for one-step construction of the dibenzylbutyrolactol lignan backbone starting from two phenyl propane derivatives,opening up a powerful new approach for lignan synthesis,which is showcased by succinct total syntheses of two biologically important aryltetralin-type lignans,β-apopicropodophyllin and *** the mild and operationally simple conditions,the developed chemistry might have a promising prospect in potential industrial applications.

关键词： [3+2]cycloaddition transition-metal catalysis tetrahydrofuran lignans natural products

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Challenges and countermeasures for developing countries in addressing loss and damage caused by climate change

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Advances in Climate Change Research 2024年第2期15卷 353-363页

作者： Shuo LIU Yu-E LI Bin WANG an-dong cai Chao FENG Hua LAN Ruo-Chen ZHAO Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Agricultural Environment Ministry of Agriculture and Rural AffairsBeijing 100081China China Clean Development Mechanism Fund Management Center Beijing 100045China School of International Law China University of Political Science and LawBeijing 100088China

Loss and damage caused by extreme climate events have attracted increasing *** 28th Conference of the Parties to the United Nations Framework Convention on Climate Change(hereinafter referred to as the Convention)has agreed to adopt Loss and Damage Fund agreement,which identified the source of funding and the funds to be entrusted to the World ***,there is still ambiguous that how to allocate the funds could accelerate the effectiveness of meeting the needs for developing ***-disaster prevention and preparedness is one of the most effective measures to deal with loss and damage,which closely related to *** studies rarely analyzed quantitatively the financial needs of pre-disaster prevention and preparedness relating to adaptation to reduce loss and *** on the official reports submitted by countries under the Convention,this study analyzes the annual change in the total financial support provided by developed countries to developing countries,the proportion of pre-disaster prevention and preparedness in the adaptation needs of developing countries,and the progress in raising the current annual funding target of 100 billion USD for developed countries,to reveal the financial and technical challenges facing by developing countries on addressing loss and *** results show that by 2030,the total adaptation financial needs of developing countries are estimated to be about 3.8 trillion USD,of which pre-disaster prevention matters account for about 9%.Therefore,by 2030,developing countries will need about 342 billion USD in pre-disaster prevention and preparedness finance to withstand loss and *** addition,developing countries face a lack of technical methods to quantify information about their *** on the above analysis,this study puts forward countermeasures and suggestions,including strengthening the allocation amount of loss and damage fund on pre-disaster warning,prevention and control actions,and

关键词： Loss and damage Funding mechanism Pre-disaster warning and preparedness Convention negotiations Countermeasures

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Research progress in CALPHAD assisted metal additive manufacturing

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China Foundry 2024年第4期21卷 295-310页

作者： Ya-qing Hou Xiao-qun Li Wei-dong cai Qing Chen Wei-ce Gao Du-peng He Xue-hui Chen Hang Su China Iron&Steel Research Institute Group Beijing 100081China Thermo-Calc Software AB SolnaSE-169Sweden KTH Royal Institute of Technology StockholmSE-100Sweden Central Iron and Steel Research Institute Beijing 100081China

Metal additive manufacturing(MAM)technology has experienced rapid development in recent *** both equipment and materials progress towards increased maturity and commercialization,material metallurgy technology based on high energy sources has become a key factor influencing the future development of *** calculation of phase diagrams(CALPHAD)is an essential method and tool for constructing multi-component phase diagrams by employing experimental phase diagrams and Gibbs free energy models of simple *** combining with the element mobility data and non-equilibrium phase transition model,it has been widely used in the analysis of traditional metal *** development of CALPHAD application technology for MAM is focused on the compositional design of printable materials,the reduction of metallurgical imperfections,and the control of microstructural *** endeavor carries considerable theoretical and practical *** paper summarizes the important achievements of CALPHAD in additive manufacturing(AM)technology in recent years,including material design,process parameter optimization,microstructure evolution simulation,and properties ***,the limitations of applying CALPHAD technology to MAM technology are discussed,along with prospective research directions.

关键词： metal additive manufacturing CALPHAD integrated computational material engineering powder bed fusion material design microstructure simulation

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Clinical efficacy of Gamma Knife® combined with transarterial chemoembolization and immunotherapy in the treatment of primary liver cancer

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1601-1608页

作者： Guo-Feng Wang Chang-Xin Shu Xiao-dong cai Hong-Bo Wang Jian-Hong Xu Yu-Qing Jia Department of General Surgery Yangzhou Friendship Hospital Affiliated to Medical College of Yangzhou UniversityYangzhou 225000Jiangsu ProvinceChina

BACKGROUND This study was designed to investigate the clinical efficacy and safety of Gamma Knife®combined with transarterial chemoembolization(TACE)and immunotherapy in the treatment of primary liver *** To investigate the clinical efficacy and safety of Gamma Knife®combined with TACE and immune-targeted therapy in the treatment of primary liver *** Clinical data from 51 patients with primary liver cancer admitted to our hospital between May 2018 and October 2022 were retrospectively *** patients underwent Gamma Knife®treatment combined with TACE and *** clinical efficacy,changes in liver function,overall survival(OS),and progression-free survival(PFS)of patients with different treatment responses were evaluated,and adverse reactions were *** The last follow-up for this study was conducted on October 31,*** evaluation of the 51 patients with primary liver cancer revealed a partial response(PR)in 27 patients,accounting for 52.94%(27/51);stable disease(SD)in 16 patients,accounting for 31.37%(16/51);and progressive disease(PD)in 8 patients,accounting for 15.69%(8/51).The objective response rate was 52.94%,and the disease control rate was 84.31%.Alanine aminotransferase,aspartate aminotransferase,lactate dehydrogenase,and alpha-fetoprotein isoform levels decreased after treatment compared with pretreatment(all P=0.000).The median OS was 26 months[95%confidence interval(95%CI):19.946-32.054]in the PR group and 19 months(95%CI:14.156-23.125)in the SD+PD group,with a statistically significant difference(P=0.015).The median PFS was 20 months(95%CI:18.441-34.559)in the PR group and 12 months(95%CI:8.745-13.425)in the SD+PD group,with a statistically significant difference(P=0.002).Common adverse reactions during treatment included nausea and vomiting(39.22%),thrombocytopenia(27.45%),and leukopenia(25.49%),with no treatment-related deaths *** Gamma Knife®combined with TACE and immune-targeted th

关键词： Gamma Knife® Transarterial chemoembolization Immunotherapy Primary liver cancer Liver function

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RuCo alloy nanoparticles embedded within N-doped porous two-dimensional carbon nanosheets:a high-performance hydrogen evolution reaction catalyst

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Tungsten 2024年第1期6卷 114-123页

作者： Jin-Hui Wang Shao-Wei Yang Fu-Bin Ma Yi-Ke Zhao Shi-Nuo Zhao Zheng-Yu Xiong dong cai Hai-dong Shen Kai Zhu Qiu-Yu Zhang Yue-Ling Cao Tian-Shuai Wang He-Peng Zhang Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Xi’an Key Laboratory of Functional Organic Porous Materials School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710129China School of Power and Energy Northwestern Polytechnical UniversityXi’an 710129China Chongqing Science and Technology Innovation Center of Northwestern Polytechnical University Chongqing 401135China

Developing cost-effective electrocatalysts with high activity and stability especially at high current density is of great significance for the large-scale commercial application of electrochemical water splitting to hydrogen production but still remains ***,we report an effective confinement pyrolysis strategy to fabricate embedded ruthenium-cobalt nanoclusters supported on N-doped porous two-dimensional carbon nanosheets(RuCo@CN).Markedly,the embedded structure can effectively prevent the migration,agglomeration,and leaching of nanoparticles,thus endowing the RuCo@CN catalyst with high *** be exact,high stability with up to 650 h can be achieved at high current density(-500 and-1000 mA·cm^(-2)).Besides,the RuCo@CN catalysts also exhibit highly reactive with low overpotentials of only 11mV at-10 mA·cm^(-2).Density functional theory calculations reveal that the introduction of cobalt reduces the decomposition barrier of H_(2)O for RuCo@CN alloy,thus promoting hydrogen evolution reaction.

关键词： Hydrogen evolution reaction Confinement pyrolysis strategy Mosaic structure Stability

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我知道没有一个人值得我羡慕——小记邓一光

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扬子江文学评论 2024年第2期 8-12页

作者：蔡东深圳职业技术大学深圳文学研究中心

就要在深圳待满二十年了,细想起来,一阵恍惚,毕竟在家乡生活的日子也不过十几个年头。《了不起的盖茨比》第四章,盖茨比带尼克进城,车子行驶在大桥上,城市就在河对岸。接着,一段光彩照人的描述出现了:“从皇后区大桥看去,这座城市永远... 详细信息

就要在深圳待满二十年了,细想起来,一阵恍惚,毕竟在家乡生活的日子也不过十几个年头。《了不起的盖茨比》第四章,盖茨比带尼克进城,车子行驶在大桥上,城市就在河对岸。接着,一段光彩照人的描述出现了:“从皇后区大桥看去,这座城市永远好像是初次看见一样,那样引人入胜,充满了世界上所有的神秘和瑰丽。”“这座城市永远好像是初次看见一样”,百年前小说作品中的一句话,今天读来依然叫人心有戚戚,这仍是大城市的一大特质。面对不断生长变化的城市,无论初来者还是常住居民,心头都可能会涌起陌生和不确定的感受。

关键词：《了不起的盖茨比》邓一光小说作品盖茨比河对岸常住居民大城市尼克

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关于20世纪80年代中国马克思主义史学理论重建的反思

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湖北大学学报（哲学社会科学版） 2024年第2期51卷 57-67页

作者：董彩云山东大学儒学高等研究院山东济南250100

20世纪80年代围绕中国马克思主义史学理论重建的讨论是史学界的一次重要学术争鸣。这场讨论是在改革开放新的历史背景下,史学界为厘清中国马克思主义史学理论资源和实践上的得失、确立新的历史时期马克思主义对中国史学发展的指导进行... 详细信息

20世纪80年代围绕中国马克思主义史学理论重建的讨论是史学界的一次重要学术争鸣。这场讨论是在改革开放新的历史背景下,史学界为厘清中国马克思主义史学理论资源和实践上的得失、确立新的历史时期马克思主义对中国史学发展的指导进行的努力,对改革开放以后中国史学发展具有重要影响。站在今天的角度反思,这场学术争鸣在当时有其不可或缺的创获,譬如历史发展动力和历史创造者问题的讨论挑战了阶级斗争史观的唯一性,史学的社会功能和学术价值得到更全面理性的认识等。但讨论对唯物史观所做的正本清源工作不够彻底,意识形态因素与思想解放程度对史学方法探讨有所制约等时代局限,表明中国马克思主义史学理论重建工作尚未完成。从20世纪中国马克思主义史学发展历程来看,80年代中国马克思主义史学反思、打击了极端意识形态化,推动了新时期马克思主义史学重获新生、恢复学术活力,其历史价值不容抹杀,但对此前唯物史观与中国实际相结合的历史遗产未能较好吸收。未来中国化的马克思主义历史学研究的确立,要坚持把马克思主义基本原理同中国具体实际相结合,同中华优秀传统文化相结合,构建基于中国本土经验的历史理论体系。

关键词：马克思主义史学 20世纪80年代史学马克思主义史学理论唯物史观

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颜色编码液滴阵列的机器学习解码及其在多重数字化核酸分析中的应用

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分析化学 2024年第2期52卷 198-207页

作者：刘云帆蔡东洋桂林电子科技大学数学与计算科学学院华南理工大学附属第二医院检验科

为了解决数字化核酸分析的通量限制问题，在三原色组合液滴编码技术基础上，本研究发展了一种基于机器学习的颜色编码液滴阵列自动化解码方法。此方法借助机器学习赋予计算机程序自动获取液滴颜色-位置-数量信息的能力，通过关联核酸扩... 详细信息

为了解决数字化核酸分析的通量限制问题，在三原色组合液滴编码技术基础上，本研究发展了一种基于机器学习的颜色编码液滴阵列自动化解码方法。此方法借助机器学习赋予计算机程序自动获取液滴颜色-位置-数量信息的能力，通过关联核酸扩增前后液滴颜色-位置-数量信息，快速确定每种检测靶标对应的阳性液滴比例。将这种液滴解码策略用于多重数字化核酸分析，实验结果表明，本方法快速、准确，其解码流程可在2 min内完成，液滴识别准确率> 99%。基于此液滴解码方法获得的核酸定量分析结果与商品化数字PCR仪的定量分析结果具有良好的相关性（R2> 0.99）。

关键词：机器学习液滴编码解码多重数字化核酸分析

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工作整合型社会企业参与助残赋能的困境及其破解对策——以X店为例

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吉林大学社会科学学报 2024年第1期64卷 81-92,236,237页

作者：董才生王彦卓吉林大学哲学社会学院长春130012

助残赋能是一个动态过程,通过帮助残疾人就业以提高残疾人参与生产生活的能力,进而实现残疾人的社会融合。工作整合型社会企业(WISE)具有公益性与逐利性双重价值属性,在助残赋能中具有独特作用,其作用的发挥是政府和市场共同作用的结果... 详细信息

助残赋能是一个动态过程,通过帮助残疾人就业以提高残疾人参与生产生活的能力,进而实现残疾人的社会融合。工作整合型社会企业(WISE)具有公益性与逐利性双重价值属性,在助残赋能中具有独特作用,其作用的发挥是政府和市场共同作用的结果。采用个案研究法,选取X店作为案例,从价值层面、资源层面以及运营层面分析WISE参与助残赋能的行为逻辑与目标定位。研究发现,WISE正面临公益性与逐利性目标设定错位、资金来源不持续、市场资源获取困难、经济效益不稳定、扩张困难等困境。从政府与市场关系角度来看,该困境正是由于政府政策规制不足而无法缓解秉持逐利本质的市场对WISE助残赋能造成的消极影响。突破这一困境的关键在于加强政府政策规制,在价值层面,实现从低维度到高维度的助残价值判断标准转向;在资源层面,强化政府责任,帮助链接各方资源;在运营层面,加大对WISE的宣传,推动对优秀社会企业家的培养,以创造一个能够真正实现WISE助残赋能价值的有利环境,充分发挥WISE在助残赋能中的作用。

关键词：工作整合型社会企业助残赋能政府规制

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