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Novel method for improving iron recovery from electric arc furnace slag: on-site hot modification

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Journal of Iron and Steel Research International 2022年第8期29卷 1224-1235页

作者： Xiang Lu Xiao-li Huang Ru-fei Wei Wen Chen da-qiang Cang Fei-hua Yang Chun-lei Pu Changsha Research Institute of Mining&Metallurgy Co. Ltd.Changsha 410012HunanChina School of Metallurgy and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Technological Institute of Development and Strategy Studies Panzhihua 617000SichuanChina School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243000AnhuiChina State Key Laboratory of Solid Waste Reuse for Building Materials(SKL-SWR) Beijing Building Materials Academy of Sciences Research(BBMA)Beijing 100083China Iron and Steel Technology Research Institute HUATIAN Engineering&Technology CorporationMCCNanjing 210019JiangsuChina

The iron element in electric arc furnace(EAF)slag is extremely difficult to recycle due to the low specific magnetic susceptibility of the RO phase(a solid solution of FeO,MgO,CaO,and MnO).Landfilling EAF slag is strictly forbidden for environmental consideration because of poisonous Cr^(6+) *** original RO phase could be transformed to a spinel structure,whose specific magnetic susceptibility is much higher than that of other minerals,through hot modification,resulting in significantly increased iron recovery by magnetic *** of spinel crystals encloses chromium,such that iron and chromium could be recovered *** chromium in obtained iron concentrates is considerably useful for stainless steel making rather than polluting the *** a result,recovering iron and chromium is truly beneficial for cleaner *** modification of EAF slag should be conducted at 1500-1600ºC for at least 60 min to guarantee homogeneous liquid *** liquid slag was poured onto an iron mold to obtain modified slag(MS)through air *** was characterized by thermodynamic analysis,X-ray diffraction,and scanning electron microscopy combined with energy-dispersive spectroscopy to correlate the relationship between mineral structures and iron *** iron recovery rate of MS first increased and then decreased with increasing *** was less than 10%when the modifier addition amount was below 12 wt.%,but it increased rapidly as the modifier addition amount increased from 16 to 24 wt.%,mainly due to spinel *** highest iron recovery rate was 81.9%when the modifier amount reached 20 wt.%.Meanwhile,Cr^(6+) was enriched in the spinel phase but was not observed in other *** tests were performed on-site with the modifier ranging from 12 to 18 wt.%because additional heat was not provided during the *** showed that MS with 18 wt.%modifier addition exhibited an iron recovery rate of 61.0%,much h

关键词： EAF slag On-site hot modification Iron recovery Chromium recovery Spinel Industrial test

Deep reinforcement learning:a survey

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Frontiers of Information Technology & Electronic Engineering 2020年第12期21卷 1726-1744页

作者： Hao-nan WANG Ning LIU Yi-yun ZHANG da-wei FENG Feng HUANG Dong-sheng LI Yi-ming ZHANG Science and Technology on Parallel and Distributed Processing Laboratory National University of Defense TechnologyChangsha 41OOOOChina

Deep reinforcement learning(RL)has become one of the most popular topics in artificial intelligence *** has been widely used in various fields,such as end-to-end control,robotic control,recommendation systems,and natural language dialogue *** this survey,we systematically categorize the deep RL algorithms and applications,and provide a detailed review over existing deep RL algorithms by dividing them into modelbased methods,model-free methods,and advanced RL *** thoroughly analyze the advances including exploration,inverse RL,and transfer ***,we outline the current representative applications,and analyze four open problems for future research.

关键词： Reinforcement learning Deep reinforcement learning Reinforcement learning applications

One-step and Continuous Fabrication of Coaxial Piezoelectric Fiber for Sensing Application

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Chinese Journal of Polymer Science 2023年第11期41卷 1778-1785,I0009页

作者： Shuai-Shuai Gui Bing-Xu da Fei Peng Guo-Qiang Zheng Kun dai Chun-Tai Liu Chang-Yu Shen College of Materials Science and Engineering Key Laboratory of Material Processing and Mold(Ministry of Education)Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhou 450001China

Although there has been rapid advancement in piezoelectric sensors,challenges still remain in developing wearable piezoelectric sensors by a one-step,continuous and environmentally friendly *** this work,a 1D flexible coaxial piezoelectric fiber was directly fabricated by melt extrusion molding,whose core and sheath layer are respectively slender steel wire(i.e.,electrode)and PVDF(i.e.,piezoelectric layer).Moreover,such 1D flexible coaxial piezoelectric fiber possesses short response time and high sensitivity,which can be used as a selfpowered sensor for bending and vibration *** interestingly,such 1D flexible coaxial piezoelectric fiber(1D-PFs)can be further endowed with 3D helical ***,a wearable and washable motion monitoring system can be constructed via braiding such 3D helical piezoelectric fiber(3D-PF)into commercial *** work paves a new way for developing 1D and 3D piezoelectric fibers through a one-step,continuous and environmentally friendly method,showing potential applications in the field of sensing and wearable electronics.

关键词： Coaxial piezoelectric fiber Melt extrusion molding Bending and vibration sensing Motion monitoring system

Physiological Effect of Kinetin on the Photosynthetic Apparatus and Antioxidant Enzymes Activities During Production of Anthurium

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Horticultural Plant Journal 2018年第5期4卷 182-192页

作者： de MOURA Fabiana B. VIEIRA Marcos R. da S. SIMOES Adriano do N. FERREIRA-SILVA Sérgio L. de SOUZA Carlos A.V. de SOUZA Eduardo S. da ROCHA Alexandre T. da SILVA Luzia F. JUNIOR Miguel A. Faculty of Agronomy Federal University of Pará Postgraduate Program in Plant Production Serra Talhada Academic UnitFederal Rural University of Pernambuco Department of Production Vegetable Unidade Academica de GaranhusFederal Rural University of Pernambuco

The results observed in the literature raise the hypothesis according to which cytokinin plays important roles in photosynthetic metabolisms and antioxidant enzymes. Thus, the study aimed to evaluate the effect of foliar application of the isolated cytokinin kinetin at the production cycle, seeking to analyze its effects on enzyme activity and photosynthetic parameters. The plants treated with CK presented reduction of leaf CO_2 assimilation rate(Pn) and stomatal conductance(Gs), while that transpiration rate(Tr) was unaffected. The internal CO_2 concentrations decreased with the increase in cytokinin levels, but were maintained under CK 50 mg·L^(-1). The plants treated with CK 75 mg·L^(-1) was verified higher carboxylation efficiency(Pn/Ci), which was associated to values of CO_2 assimilation and transpiration unaltered. Apparent electron transport rate showed variations in the concentration of 25 mg·L^(-1). Considering the study of enzyme activity, on the other hand, it cannot be stated that kinetin has an effective action in delaying oxidative damage. It presents mixed results, since an efficiency in the application of cytokinin was not observed, presenting induction levels of ascorbate peroxidase activity. Thus, further research is needed to determine more precisely the effects of kinetin on gas exchange and antioxidant enzymes in anthurium plants.

关键词： anthurium kinetin photosynthesis senescence plant hormone oxidative stress

基于异或门的动态可重构的ROPUF设计与验证

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集成电路应用 2024年第1期41卷 8-10页

作者：赵达张竣昊魏江杰张锐骆思成中电科申泰信息科技有限公司江苏214100

阐述物理不可克隆函数(Physical Unclonable Function,PUF)技术的新结构、响应纠错、安全性及其应用,这是可重构物理不可克隆技术电路结构的研究,属于PUF新结构研究的一个分支。针对已提出的环形振荡器物理不可克隆函数(Ring Oscillator... 详细信息

阐述物理不可克隆函数(Physical Unclonable Function,PUF)技术的新结构、响应纠错、安全性及其应用,这是可重构物理不可克隆技术电路结构的研究,属于PUF新结构研究的一个分支。针对已提出的环形振荡器物理不可克隆函数(Ring Oscillator Physical Unclonable Functions,RO PUF)鲁棒性不足的缺点,提出基于异或门的可重构环形振荡器(XOR Ring Oscillator,XOR RO)的物理不可克隆函数电路。为了验证新型PUF结构的有效性。借助Vivado工具制造硬宏,在多块同型号Xilinx XCVU440上分析基于异或门的可重构环形振荡器的物理不可克隆函数电路。相比传统ROPUF,基于异或门的可重构环形振荡器的物理不可克隆函数电路,展现更高的片间汉明距离和更低的片内汉明距离。

关键词：物理不可克隆函数环形振荡器可重构异或门

Making FAIR Easy with FAIR Tools:From Creolization to Convergence

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data Intelligence 2020年第1期2卷 87-95,305页

作者： Mark Thompson Kees Burger Rajaram Kaliyaperumal Marco Roos Luiz Olavo Bonino da Silva sa.tos Leiden University Medical Center Leiden2333 ZAThe Netherlands GO FAIR international Support&Coordination Office(GFISCO) LeidenThe Netherlands

Since their publication in 2016 we have seen a rapid adoption of the FAIR principles in many scientific disciplines where the inherent value of research data and,therefore,the importance of good data management and data stewardship,is *** has led to many communities asking“What is FAIR?”and“How FAIR are we currently?”,questions which were addressed respectively by a publication revisiting the principles and the emergence of FAIR ***,early adopters of the FAIR principles have already run into the next question:“How can we become(more)FAIR?”This question is more difficult to answer,as the principles do not prescribe any specific standard or ***,there does not yet exist a mature ecosystem of tools,platforms and standards to support human and machine agents to manage,produce,publish and consume FAIR data in a user-friendly and efficient(i.e.,“easy”)*** this paper we will show,however,that there are already many emerging examples of FAIR tools under *** paper puts forward the position that we are likely already in a creolization phase where FAIR tools and technologies are merging and combining,before converging in a subsequent phase to solutions that make FAIR feasible in daily practice.

关键词： FAIR data FAIR in practice FAIR tools FAIR application support creolization and convergence

Enhancement Effect of CpG DNA on the Somatostatin DNA Vaccine in Mice

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Agricultural Sciences in China 2007年第7期6卷 882-889页

作者： XUE Chun-lin MAO da-gan YANG Li-guo CHENG Bao College of Animal Science and Technology Huazhong Agricultural University Wuhan 430070 P.R.China Research Institute of Animal Breeding ＆ Reproduction Nanjing Agricultural University Nanjing 210095 P.R.China Yancheng Institute of Animal Husbandry ＆ Veterinary Yancheng 224002 P.R. China

To study the immune effect of CpGDNA on somatostatin （SS） DNA vaccine, the 20-day-old experimental mice were immunized with 20 lag SS eukaryotic expression plasmid pES/2SS with different adjuvants in equal dose, such as the synthetic CpG-ODN, the pE-CpG plasmid, E. coli DNA and the crude liposome. A booster was given two weeks later. The results showed that the body weight gain of female mice in the SS immunized group was higher than that of the control （P 〈0.05）. The levels of antibodies against SS, IgG2a/IgG1, spleen lymphocyte proliferation activity and the concentrations of GH and IGF-Ⅰ in the DNA vaccine groups combined with CpGDNA were significantly increased compared to that of the group immunized with DNA vaccine alone. All these suggested the recombinant SS expression plasmid can stimulate animals to produce antibodies against SS, and CpGDNA adjuvant can enhance the immune effect of DNA vaccine against SS and influence the concentration of GH and IGF-Ⅰ .

关键词： immnostimulatory sequence CpGDNA somatostatin DNA vaccine

Visible-light-driven external-photocatalyst-free alkylative carboxylation of alkenes with CO_(2)

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Science China Chemistry 2021年第7期64卷 1164-1169页

作者： Ya-Nan Niu Xing-Hao Jin Li-Li Liao He Huang Bo Yu Yu-Ming Yu da-Gang Yu Urumqi Key Laboratory of Green Catalysis and Synthesis Technology Key Laboratory of Energy Materials ChemistryMinistry of EducationKey Laboratory of Advanced Functional MaterialsAutonomous RegionCollege of ChemistryXinjiang UniversityUrumqi 830046China Key Laboratory of Green Chemistry&Technology of Ministry of Education College of ChemistrySichuan UniversityChengdu 610064China

Herein,we report a novel protocol for visible-light-driven alkylative carboxylation of alkenes with CO_(2) in the absence of external *** the irradiation of visible light,a variety of 4-alkyl-1,4-dihydropyridines(alkyl-DHPs)serve as not only alkyl radical precursors but also photoexcited reductants probably with the potential to reduce benzyl *** styrenes and acrylates are applicable in this reaction to give structurally diverse carboxylic acids in good to excellent *** reactions feature mild reaction conditions(1 atm of CO_(2),room temperature,visible light,photocatalyst-and transition metalfree),good functional group tolerance,easy scalability,as well as high regio-,and *** investigations provide evidence that alkyl radical,benzyl radical and carbanion might be involved in this reaction,providing a novel strategy for CO_(2) utilization.

关键词： carbon dioxide external-photocatalyst-free visible light alkylative carboxylation alkene

学生制作微课在高专天然药物化学课程建设中的应用探索

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云南化工 2024年第2期51卷 167-170页

作者：杨惠邱艳明毛群芳李达刘颖新湖南中医药高等专科学校药学系湖南株洲412002

在“互联网+”时代,教育紧跟时代步伐,已经发生了翻天覆地的变化,其中微课已成为各大高校信息化教学常用的手段和载体。在推进信息化教育的进程中,无论教师还是学生都面临着一系列的挑战和创新。通过从学生制作微课这一全新模式出发,阐... 详细信息

在“互联网+”时代,教育紧跟时代步伐,已经发生了翻天覆地的变化,其中微课已成为各大高校信息化教学常用的手段和载体。在推进信息化教育的进程中,无论教师还是学生都面临着一系列的挑战和创新。通过从学生制作微课这一全新模式出发,阐明了具体实施的全过程,进行了天然药物化学课程建设的创新改革,为建设高水平的线上线下混合教学精品课提供参考。

关键词：学生微课天然药物化学课程建设