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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang Xuheng Chen Junfang bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

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Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang Wei Pi Sheng Hu Haifeng bao Na Yao Wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

股骨假体对位不齐对骨质疏松患者膝关节内侧单髁置换后外侧间室结构应力的影响

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中国组织工程研究 2025年第15期29卷 3153-3158页

作者：刘蒙飞孙荣鑫姜侃新疆医科大学第六附属医院新疆维吾尔自治区乌鲁木齐市830000

背景:假体对位不齐和患者骨质情况是影响单髁置换预后的重要因素,内侧单髁置换后外侧间室骨关节炎进展是导致其高翻修率的主要并发症。因此,这将成为今后的研究热点。目的:分析不同股骨假体倾斜角度对正常骨质和骨质疏松患者内侧单髁置... 详细信息

背景:假体对位不齐和患者骨质情况是影响单髁置换预后的重要因素,内侧单髁置换后外侧间室骨关节炎进展是导致其高翻修率的主要并发症。因此,这将成为今后的研究热点。目的:分析不同股骨假体倾斜角度对正常骨质和骨质疏松患者内侧单髁置换后外侧间室结构应力的影响,并探讨骨质疏松与术后外侧间室骨关节炎的相关性。方法:使用经验证的膝关节有限元模型,建立正常骨质(M1)和骨质疏松(M2)单髁置换模型,并分别建立股骨假体倾斜模型(正常骨质组:内倾3°,6°,9°,12°、标准位置0°、外倾3°,6°,9°,12°;骨质疏松组:内倾3°,6°,9°,12°、标准位置0°、外倾3°,6°,9°,12°),共计18种工况。评估不同股骨假体倾斜角度对外侧间室半月板、胫骨软骨和股骨软骨的应力大小和分布的影响。结果与结论:①两组模型外侧间室半月板表面和胫骨软骨表面的高应力值随假体内倾角度的增加而增加,随假体外倾角度的增加而减小,相同工况下骨质疏松组半月板表面的峰值应力大于正常骨质组,但骨质疏松组胫骨软骨表面的峰值应力却小于正常骨质组;②两组模型外侧间室股骨软骨的高应力值随假体内倾和外倾角度的增加而增加,相同工况下骨质疏松组股骨软骨的峰值应力大于正常骨质组;③提示固定平台股骨假体内倾时,正常骨质和骨质疏松膝关节内侧单髁置换后外侧间室结构的应力均将增加,骨质疏松膝关节外侧间室应力增加更为明显;所以单髁置换过程中应特别注意假体安放位置,尽量避免内倾和外倾;同时,研究结果证实了骨质疏松可能会加重内侧单髁置换后外侧间室骨关节炎的进展。

关键词：膝骨关节炎骨质疏松单髁置换股骨组件生物力学

Posttraumatic stress symptoms among Chinese university students during the COVID-19 pandemic:Prevalence,correlates,and mental health help-seeking

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World Journal of Psychiatry 2025年第1期15卷 145-152页

作者： Rui-Yao Wu Lin-Feng Ge bao-Liang Zhong Department of Psychiatry The Affiliated Wuhan Mental Health CenterTongji Medical College of Huazhong University of Science&TechnologyWuhan 430012Hubei ProvinceChina Department of Psychiatry Wuhan Mental Health CenterWuhan 430012Hubei ProvinceChina

BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking behavior of individuals with PTSSs has critical implications for public mental health strategies in future medical *** To investigate the prevalence and correlates of PTSSs among university students during the first wave of the COVID-19 pandemic in China and to examine mental health help-seeking behaviors among these *** A total of 2507 Chinese university students were recruited via snowball *** students completed the Seven-item Screening Scale for Post-traumatic Stress Disorder during the first wave of the COVID-19 pandemic in ***-graphic characteristics,pandemic-related characteristics,and mental health help-seeking behaviors of students with PTSSs were also *** The prevalence of PTSSs among the participants was 28.0%.Seven significant correlates of PTSSs were identified(odds ratio=1.23-3.65,P≤0.024):Female sex,being 19 years old or older,living with others or alone,a low level of family economic status,fair or poor interpersonal relationships,severe or very severe local pandemic,and having family members diagnosed with ***,only 3.28%of the students with PTSSs reported seeking help from mental health *** the 23 students who sought help from mental health specialists,13 opted for online or telephone-based psychological *** Our data suggest that there was a high risk of PTSSs among university students and a high level of unmet mental health needs during the COVID-19 *** delivery of mental health services online or via telephone is a promising approach to address these unmet needs.

关键词： Posttraumatic stress symptoms University students COVID-19 Mental health help-seeking China

Positive role of nitrite as electron acceptor on anoxic denitrifying phosphorus removal process

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Chinese Science Bulletin 2007年第16期52卷 2179-2183页

作者： HUANG rongxin LI Dong LI XiangKun bao LinLin JIANG AnXi ZHANG Jie School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China School of Architecture and Civil Engineering Beijing Univerity of Technology Beijing 100022 China

Literatures revealed that the electron acceptor-nitrite could be inhibitory or toxic in the denitrifying phosphorus removal process. Batch test experiments were used to investigate the inhibitory effect during the anoxic condition. The inoculated activated sludge was taken from a continuous double-sludge denitrifying phosphorus and nitrogen removal system. Nitrite was added at the anoxic stage. One time injection and sequencing batch injection were carried on in the denitrifying dephosphorus procedure. The results indicated that the nitrite concentration higher than 30 mg/L would inhibit the anoxic phosphate uptake severely,and the threshold inhibitory concentration was dependent on the characteristics of the activated sludge and the operating conditions; instead,lower than the inhibitory concentration would not be detrimental to anoxic phosphorus uptake,and it could act as good electron acceptor for the anoxic phosphate accumulated. Positive effects performed during the denitrifying biological dephosphorus all the time. The utility of nitrite as good electron acceptor would provide a new feasible way in the denitrifying phosphorus process.

关键词：脱氮除磷细菌亚硝酸盐电子接收体抑制浓度废水处理

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第01期 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-Song Yang Fu-Min Zhang Ai-Jun Ma bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

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Dynamic Evolvement of Agricultural System and Typical Patterns of Modern Agriculture in Coastal China:A Case of Suzhou

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Chinese Geographical Science 2009年第3期19卷 249-257页

作者： ZHAI rongxin LIU Yansui Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Shandong Provincial Land Survey ＆ Planning Institute Jinan 250014 China

Based on dynamic theory of system, agriculture is a complex system composed by element, structure, function and development. Firstly, this paper analyzes their connotation and relationship, which could be simply described that in virtue of element integrating and structure optimizing, agricultural system may achieve multifunctionality to meet increasingly diverse demands. As a case study of Suzhou, it concludes that Suzhou has a LP-dependence on agricultural element, and the growth extent of agricultural productivity correlates to the ratio of agricultural labor reduc- ing rate to farmland reducing rate. Agricultural structure of Suzhou changed with time, and in the early 1980s and 2000s it was most notable. Correspondingly, agricultural function has experienced a succession process: 'production', 'production-living', and 'production-living-ecology'. At last, based on questionnaires and interviews, some new characteristics and problems of agricultural development in coastal developed region of China have been put forward. Meanwhile, some typical patterns of modern agriculture in Suzhou which adapt to system evolving are also brought up such as export-oriented agriculture, enterprises-leading agriculture, agricultural science and technology parks, characteristic and stereoscopic agriculture, tourism and sightseeing agriculture.

关键词： modern agriculture agricultural system Suzhou coastal China

A new entropic force scenario and holographic thermodynamics

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Science China(Physics,Mechanics & Astronomy) 2011年第11期54卷 1915-1924页

作者： GU Wei LI Miao MIAO rongxin Interdisciplinary Center for Theoretical Study University of Science and Technology of China Hefei 230026 China Kavli Institute for Theoretical Physics Key Laboratory of Frontiers in Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China

We propose a new holographic program of gravity in which we introduce a surface stress *** proposal differs from Verlinde's in several ***,we use an open or a closed ***,the temperature is not necessary,but a surface energy density and pressure are *** surface stress tensor is proportional to the extrinsic ***,the energy we use is Brown-York energy and the equipartition theorem is violated by a non-vanishing surface *** discuss holographic thermodynamics of a gas of weak gravity and find a chemical potential,and then show that Verlinde's program does not lead to reasonable *** holographic entropy is similar to the Bekenstein entropy bound.

关键词： entropic gravity entropy bound the holographic principle

Distributed Region Tracking and Perimeter Surveillance for Second-Order Multi-Agent Systems in Star-Shaped Sets

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Journal of Systems Science & Complexity 2024年第5期37卷 1995-2020页

作者： SHANG Juan MO Lipo MI rongxin CAO Xianbing School of Mathematics and Statistics Beijing Technology and Business UniversityBeijing 100048China The Department of Foundation Shijiazhuang Institute of Railway TechnologyShijiazhuang 050041China School of Computer and Artificial Intelligence Beijing Technology and Business UniversityBeijing 100048China Research Centre for Agri-Product Quality Traceability Beijing Technology and Business UniversityBeijing 100048China Coordination Center of China National Computer Network Emergency Response Technical TeamBeijing 100029China

This paper investigates region tracking and perimeter surveillance of second-order multiagent systems,where all agents move within a star-shaped ***,by coordination transformations,the region tracking problem is converted from the star-shaped sets to a circular *** authors employ communication and collaboration to complete region tracking and perimeter surveillance tasks,and then revert back to the star-shaped set by using inverse ***,the authors propose a distributed control strategy based on attractive and interaction potential functions,under which all agents can quickly track a given circular region and move around the ***,the authors validate the effectiveness and performance advantages of the proposed method through simulation experiments.

关键词： Distributed control multi-agent systems star-shaped sets target tracking