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Intelligent optimization method for the dynamic scheduling of hot metal ladles of one-ladle technology on ironmaking and steelmaking interface in steel plants

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International Journal of Minerals,Metallurgy and Materials 2023年第9期30卷 1729-1739页

作者： Li Zeng zhong zheng Xiaoyuan Lian Kai Zhang Mingmei Zhu Kaitian Zhang Chaoyue Xu Fei Wang College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Shougang Jingtang Iron&.Steel Co. Ltd.Tangshan 063200China

The one-ladle technology requires an efficient ironmaking and steelmaking interface. The scheduling of the hot metal ladle in the steel plant determines the overall operational efficiency of the interface. Considering the strong uncertainties of real-world production environments, this work studies the dynamic scheduling problem of hot metal ladles and develops a data-driven three-layer approach to solve this problem. A dynamic scheduling optimization model of the hot metal ladle operation with a minimum average turnover time as the optimization objective is also constructed. Furthermore, the intelligent perception of industrial scenes and autonomous identification of disturbances, adaptive configuration of dynamic scheduling strategies, and real-time adjustment of schedules can be realized. The upper layer generates a demand-oriented prescheduling scheme for hot metal ladles. The middle layer adaptively adjusts this scheme to obtain an executable schedule according to the actual supply–demand relationship. In the lower layer, three types of dynamic scheduling strategies are designed according to the characteristics of the dynamic disturbance in the model:real-time flexible fine-tuning, local machine adjustment, and global rescheduling. Case test using 24 h production data on a certain day during the system operation of a steel plant shows that the method and system can effectively reduce the fluctuation and operation time of the hot metal ladle and improve the stability of the ironmaking and steelmaking interface production rhythm. The data-driven dynamic scheduling strategy is feasible and effective, and the proposed method can improve the operation efficiency of hot metal ladles.

关键词： hot metal ladles ironmaking and steelmaking interface one-ladle technology dynamic scheduling data-driven

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αExtractor: a system for automatic extraction of chemical information from biomedical literature

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Science China(Life Sciences) 2024年第3期67卷 618-621页

作者： Jiacheng Xiong Xiaohong Liu Zhaojun Li Hongzhong Xiao Guangchao Wang Zhenjiang Niu Chaoyuan Fei Feisheng zhong Gang Wang Wei Zhang Zunyun Fu Zhiguo Liu Kaixian Chen Hualiang Jiang Mingyue zheng Drug Discovery and Design Center State Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China AI Department Suzhou Alphama Biotechnology Co.Ltd.Suzhou 215125China College of Computer and Information Engineering Dezhou UniversityDezhou 253023China

Dear Editor,Great progress has been made using artificial intelligence(AI) techniques in learning knowledge from biomedical databases in recent years, revolutionizing the study of many fields, such as protein structure prediction and protein design(Madani et al., 2023). However, there is massive biomedical knowledge not curated in the form of structured data but hidden in primary scientific literature.

关键词： has such knowledge

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Tandem organic solar cells with 20.6% efficiency enabled by reduced voltage losses

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National Science Review 2023年第6期10卷 215-225页

作者： Jianqiu Wang zhong zheng Pengqing Bi Zhihao Chen Yafei Wang Xiaoyu Liu Shaoqing Zhang Xiaotao Hao Maojie Zhang Yongfang Li Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductoroptoelectronics Materials and Devices College of Chemistry Chemical Engineering and Materials Science Soochow University School of Chemistry and Biology Engineering University of Science and Technology Beijing School of Physics State Key Laboratory of Crystal Materials Shandong University University of Chinese Academy of Sciences CAS Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences

Large voltage losses are the main obstacle for achieving high efficiency in organic solar cells(OSCs).Here we construct ternary OSCs by introducing an asymmetric small molecule acceptor AITC into PBDB-TCl:BTP-eC9 system and demonstrate the effectiveness in simultaneously decreasing energy disorder and non-radiative voltage losses.It is found that the introduction of AITC can modify domain size and increase the degree of crystallinity,which enhances open-circuit voltage and power conversion efficiency(19.1%,certified as 18.9%).Inspiringly,an output efficiency of 20.6% of the constructed tandem OSCs based on PBDB-TCl:AITC:BTP-eC9 ternary active layer output a recorded efficiency of 20.6%(certified as 20.3%),which is the highest value in OSCs field to date.This work demonstrates that decreasing the voltage losses by ternary strategy and constructing of tandem architecture are effective approaches towards improving photovoltaic performance.

关键词： organic solar cells power conversion efficiency voltage losses tandem cells ternary strategy

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Effect of endometrial thickness on the risk of ectopic pregnancy for frozen embryo transfer

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生殖与发育医学(英文) 2024年第2期8卷 75-81页

作者： Huang Li-Juan zheng Qu Wang Xue-Jiao zhong Zhao-Hui Fu Li-Juan Lv Xing-Yu Geng Li-Hong Tang Xiao-Jun Ding Yu-Bin Wan Qi Department of Obstetrics and Gynecology Women and Children’s Hospital of Chongqing Medical University Chongqing China School of Public Health Joint International Research Laboratory of Reproduction and Development of the Ministry of Education of China Chongqing China The Reproductive Center Chengdu Xinan Gynecology Hospital Chengdu China School of Public Health Research Center for Medical and Social Development Chongqing Medical University Chongqing China Department of Pharmacology Academician Workstation Changsha Medical University Changsha China Department of Obstetrics and Gynecology West China Second Hospital Sichuan University Chengdu China

Objective: Few studies have explored the suitability of endometrial thickness (EMT) as a predictor of ectopic pregnancy (EP) in frozen embryo transfer (FET) cycles. Our study aimed to investigate the association between EMT and EP and explore the cutoff value of EMT to predict EP.Methods: This retrospective cohort study included women aged 20-45 years undergoing FET between March 2015 and September 2021. The primary outcomes and measured variables were EP and EMT, respectively. The threshold effect of EMT on EP was calculated based on a constructed smooth curve fitting. The patients were divided into two groups based on the threshold for comparison. A subgroup analysis was conducted to examine whether the relationship between EMT and EP remained consistent across the different subgroups. Additionally, a generalized linear model was used to analyze the interactions between the treatment factors and EMT in EP.Results: In total, 27,549 FET cycles were included, with 27,086 intrauterine and 463 ectopic pregnancies. The risk of EP in the EMT ≤8.7 mm group was 3.36 times higher than that in the EMT >8.7 mm group (odds ratio [OR]: 3.36, 95% confidence interval [CI]: 2.57-4.05). Subgroup analysis further indicated that a thin EMT was a risk factor for EP, independent of other risks. We also noted that diminished ovarian reserve, tubal factor infertility, transfer of two embryos, or transfer of cleavage-stage embryos may further enhance the risk of EP in patients with thin endometrium.Conclusions: Thin endometrium was associated with an increased risk of EP. Patients with EMT less than 8.7 mm need close medical observation and management after embryo transfer. In addition, diminished ovarian reserve, tubal factor infertility, transfer of two embryos, or transfer of cleavage-stage embryos may significantly enhance the effect of a thin endometrium on the risk of EP.

关键词： Endometrial thickness Thin endometrium Ectopic pregnancy FET cycle Risk factors

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Simulation of deuterium pellet ablation and deposition in the EAST tokamak with HPI2 code

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Chinese Physics B 2024年第4期33卷 561-569页

作者：李大正张洁侯吉磊李懋孙继忠 Key Laboratory of Materials Modification by Laser Ionand Electron BeamsSchool of PhysicsDalian University of TechnologyDalian 116024China Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

Pellet injection is a primary method for fueling the plasma in magnetic confinement devices.For that goal the knowledges of pellet ablation and deposition profiles are critical.In the present study,the pellet fueling code HPI2 was used to predict the ablation and deposition profiles of deuterium pellets injected into a typical H-mode discharge on the EAST tokamak.Pellet ablation and deposition profiles were evaluated for various pellet injection locations,with the aim at optimizing the pellet injection to obtain a deep fueling depth.In this study,we investigate the effect of the injection angle on the deposition depth of the pellet at different velocities and sizes.The ablation and deposition of the injected pellet are mainly studied at each injection position for three different injection angles:0°,45°,and 60°.The pellet injection on the high field side(HFS)can achieve a more ideal deposition depth than on the low field side(LFS).Among these angles,horizontal injection on the middle plane is relatively better on either the HFS or the LFS.When the injection location is 0.468 m below the middle plane on the HFS or 0.40 m above the middle plane of the LFS,it can achieve a similar deposition depth to the one of its corresponding side.When the pre-cooling effect is taken into account,the deposition depth is predicted to increase only slightly when the pellet is launched from the HFS.The findings of this study will serve as a reference for the update of pellet injection systems for the EAST tokamak.

关键词： pellet injection pellet ablation HPI2 pellet deposition

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水中微/纳塑料电化学检测及去除的研究进展

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环境科学 2024年第2期45卷 1210-1221页

作者：郑伟康刘振中项晓方南昌大学鄱阳湖环境与资源利用教育部重点实验室南昌330031 南昌大学资源与环境学院南昌330031

微/纳塑料(M/NPs)因颗粒小、易吸附和迁移性强等特点,广泛地分散在土壤、大气与水环境中,近年来在各大水体中均有检出.M/NPs作为一类新兴污染物,其生理毒性对人类健康产生很大的影响.目前该研究领域遇到的瓶颈在于对M/NPs的精准检测和... 详细信息

微/纳塑料(M/NPs)因颗粒小、易吸附和迁移性强等特点,广泛地分散在土壤、大气与水环境中,近年来在各大水体中均有检出.M/NPs作为一类新兴污染物,其生理毒性对人类健康产生很大的影响.目前该研究领域遇到的瓶颈在于对M/NPs的精准检测和高效去除.电化学技术因其在M/NPs的检测上表现出简携、灵敏和低成本等优势,对M/NPs的去除具有环保绿色、反应可控和效率高等优点,展现出巨大的应用潜力.以M/NPs的污染现状为出发点,对电化学技术应用于水环境中M/NPs的检测和去除进行了阐述和总结,分析了M/NPs的电化学传感方法以及传感器识别M/NPs的原理和特点,讨论了电絮凝、电吸附、电氧化和电还原技术对水体中M/NPs的去除效果及影响因素.结果表明,基于电化学传感方法检测M/NPs颗粒表现出良好的表征性能,通过电化学技术(电絮凝、电吸附、电氧化和电还原),M/NPs可被高效去除.电化学技术对M/NPs检测和去除的影响因素主要与传感器装置、电极材料、材料界面调控、参数条件和反应器体系有关.研究者未来应从传感器的设计、电极材料的开发和反应过程的优化这三方面聚焦,有望实现M/NPs从实验室的检测和去除转化到实际水体当中的应用.

关键词：微/纳塑料(M/NPs) 电化学检测去除影响因素

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Visible-light induced transition-metal and photosensitizer-free conversion of aldehydes to acyl fluorides under mild conditions

Green Synthesis and Catalysis

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Green Synthesis and Catalysis 2022年第4期3卷 373-376页

作者： Yatao Lang Xinlong Han Xiangjun Peng zhong zheng Chaojun Li Huiying Zeng The State Key Laboratory of Applied Organic Chemistry and the College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education Gannan Medical UniversityGanzhou 341000China Department of Chemistry and FQRNT Centre for Green Chemistry and CatalysisMcGill UniversityMontrealQuebec H3A 0B8Canada

Acyl fluorides are powerful synthons for acylation with wide application in the synthesis of valued compounds,especially peptides.Herein,a practical and catalyst-free method for the synthesis of acyl fluorides from aldehydes via C(sp^(2))-H fluorination is reported.This method enables the conversion of both aliphatic and aromatic aldehydes into acyl fluorides in good to excellent yields by visible-light under mild conditions in the absence of transition-metal and external photosensitizer.A variety of functional groups were well tolerated for this transformation.This green method provides a practical pathway to synthesize acyl fluorides under mild conditions.

关键词： Visible-light induced Transition-metal and photosensitizer free Acyl fluorides Aliphatic and aromatic aldehydes C(sp2)-H fluorination

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土地出让市场化对城市碳排放绩效的影响研究--基于城市面板数据的检验分析

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华东经济管理 2024年第2期38卷 75-84页

作者：钟文郑明贵钟昌标江西理工大学矿业发展研究中心江西赣州341000 江西理工大学经济管理学院江西赣州341000 云南财经大学商学院云南昆明650221

文章基于2011—2022年中国地级市的面板数据,测算地级市土地出让市场化水平与地级市碳排放绩效,采用空间面板模型、工具变量法及调节效应模型等实证方法,检验了土地出让市场化对城市碳排放绩效的影响及其内在机制。研究发现:土地出让市... 详细信息

文章基于2011—2022年中国地级市的面板数据,测算地级市土地出让市场化水平与地级市碳排放绩效,采用空间面板模型、工具变量法及调节效应模型等实证方法,检验了土地出让市场化对城市碳排放绩效的影响及其内在机制。研究发现:土地出让市场化与城市碳排放绩效之间呈显著的“U”型非线性关系,且通过系列稳健性检验与内生性处理后,该结论依然成立;作用机制检验表明,资源配置与产业结构升级在土地出让市场化对城市碳排放绩效的作用机制中发挥中介作用;调节效应检验表明,双重目标约束在土地出让市场化与碳排放绩效关系中发挥显著调节作用。研究结论有助于深入理解土地出让市场化对城市碳排放绩效的影响效果和内在机理,为推进土地出让市场化发展、提升城市碳排放绩效和优化目标约束提供有益借鉴。

关键词：土地出让市场化城市低碳发展目标约束空间溢出

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Highly Stable Organic Solar Cells Based on an Ultraviolet-Resistant Cathode Interfacial Layer

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CCS Chemistry 2022年第3期4卷 938-948页

作者： Qing Liao Qian Kang Yi Yang zhong zheng Jinzhao Qin Bowei Xu Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049

Although the photovoltaic efficiency of organic solar cells(OSCs)has exceeded 17%,poor lifetime excludes OSCs from practical use.In particular,UV rays in sunlight may cause the decomposition of organic photovoltaic materials,which has been proved to be the main reason for the efficiency decay.At present,there is still no effective approach to substantially improve the device stability.Herein,we fabricate a highly efficient OSC with exceptional stability under sunlight illumination by incorporating a UV-resistant cathode interlayer(CIL),namely(sulfobetaine-N,Ndimethylamino)propyl naphthalene diimide(NDI-B).NDI-B was designed and synthesized based on the naphthalene diimide(NDI)unit,thereby exhibiting excellent capability of electron collection.Moreover,NDI-B shows strong absorption in the UV region and has good UV resistance.Devices using NDI-B as a CIL exhibited a photovoltaic efficiency of 17.2%,representing the state-of-the-art photovoltaic performance of OSCs.Notably,the NDI-B-modified OSC exhibited a T80 of over 1800 h under full-sun AM 1.5 G illumination(100 mW cm^(−2)),which represents the best stability for OSCs.We demonstrate that the unique ability of the NDI-B interlayer to convert UV light to an additional photocurrent can effectively protect photovoltaic materials from UV-induced decomposition,which is the key to obtain high OSC stability under operational conditions.

关键词： organic solar cell power conversion efficiency cathode interlayer device stability zwitterion

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Bending analysis of a functionally graded piezoelectric cantilever beam

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Science China(Physics,Mechanics & Astronomy) 2007年第1期50卷 97-108页

作者： YU Tao zhong zheng School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai 200092China

A new analysis based on Airy stress function method is presented for a functionally graded piezoelectric material cantilever beam. Assuming that the mechanical and electric properties of the material have the same variations along the thickness direction, a two-dimensional plane elasticity solution is obtained for the coupling electroelastic fields of the beam under different loadings. This solution will be useful in analyzing FGPM beam with arbitrary variations of material properties. The influences of the functionally graded material properties on the structural response of the beam subjected to different loads are also studied through numerical examples.

关键词： functionally graded piezoelectric material cantilever beam bending electroelastic fields

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