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Mineralogical properties and co.sintering characteristics of fluxed iron ore with magnetite co.centrates

Journal of Iron and Steel Research(International) 2024年第2期31卷 318-328页

作者： Le-le Niu Zheng-jian Liu Jian-liang Zhang Yao-zu Wang Zhen-xing Yang Si-da Li Chang-dong Shan Ben Feng School of Metallurgical and Eco.ogical Engineering University of Science and Technology BeijingBeijing100083China Institute of Artificial Intelligence University of Science and Technology BeijingBeijing100083China Xinxing Casting Pipe xinjiang co. Bayingol841300XinjiangChina

To investigate the feasibility of co.sintering of fluxed iron ore with magnetite co.centrates, the mineralogical properties of a novel fluxed iron ore were studied using particle size analysis, microsco.ic morphology characterization, and X-ray diffraction Rietveld analysis. Following that, the experiments for granulation performance and basic sintering characteristics were designed under seven different fluxed iron ore ratios, and the integrated ranking of different fluxed iron ore ratios was determined using gray relation analysis. Finally, the results of the industrial trails were co.bined with the feasibility analysis. Test and experimental results show that the fraction of the fluxed iron ore particles larger than 0.5 mm can acco.nt for more than 48%, and the particles have two morphologies: spherical-rough and flaky-smooth. Ca elements are found in the form of calcite (Caco.) and dolomite (CaMg(co.)2). The average particle size of granules and powder removal rate can be improved from 2.50 to 3.16 mm and 39.60% to 24.20%, respectively, with the increase in the fluxed iron ore ratio. Furthermore, the fluxed iron ore can improve assimilability and liquid fluidity of magnetite co.centrates. In terms of overall granulation performance and sintering characteristics, the fluxed iron ore ratios are graded from best to worst as follows: 12%, 15%, 9%, 18%, 21%, 6% and 3%. The industrial trails show that when the fluxed iron ore ratio is increased, the beneficial effect of the superior sintering characteristics of the fluxed iron ore itself is ideally balanced with the negative effect of the lower amount of additional CaO at 12% ratio, and thus, it is feasible to bring the fluxed iron ore into production at a level of roughly 12%.

关键词： Fluxed iron ore Magnetite co.centrate Granulation performance Sintering characteristics Gray relation analysis

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Modeling of LF refining process:a review

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Journal of Iron and Steel Research(International) 2024年第2期31卷 289-317页

作者： Zi-cheng Xin Jiang-shan Zhang Kai-xiang Peng Jun-guo Zhang Chun-hui Zhang Qing Liu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China Tangshan Branch Hebei Iron and Steel Co.Ltd.Tangshan063000HebeiChina xinjiang Bayi Iron and Steel co. Ltd.Baosteel GroupWulumuqi830022XinjiangChina

With the increasing demand for energy co.servation and emission reduction,more attentions have been paid to the intelligentization,greenization and low carbonization during the transformation and upgrading of steelmaking *** furnace(LF)refining is one of the key procedures in steelmaking process and has been widely used in steelmaking plants for its high equipment matching degree,low equipment investment and outstanding refining *** to the main tasks of LF refining process,the modeling methods of temperature prediction model,slag-making model,alloying model,argon blowing model and model of inclusions behavior were systematically reviewed,and the advantages and disadvantages of each modeling method were *** addition,the technical framework for the future has also been proposed based on existing works,including classification of raw materials,graphic representation of knowledge,introduction,upgradation and management of device/equipment,customization of steelmaking,modeling of refining process,synergy of models,intelligentization of decision-making,automation of co.trol,and digitization of processes and operations,aiming to provide a reference for the modeling and intelligent development of LF refining process.

关键词： LF refining Temperature prediction Slag-making Alloying Argon blowing Inclusion behavior Modeling method

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Asymmetric dark matter and Sommerfeld enhancement

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co.munications in Theoretical Physics 2024年第08期76卷 120-125页

作者： Sujuan Qiu Hoernisa Iminniyaz Wensheng Huo School of Physics science and technology Xinjiang University

We study the relic density of asymmetric dark matter with long-range interactions by co.sidering the Sommerfeld effect. We find that the annihilation cross section of asymmetric dark matter is enhanced by the Sommerfeld effect and thus the relic density is decreased. Then we use the Planck data to co.strain the asymmetry factor, co.pling, and to derive the upper bounds on the dark matter mass in s-wave and p-wave annihilation cases.

关键词： asymmetric dark matter relic density Sommerfeld enhancement

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Advanced rare earth tantalate RETaO4（RE=Dy,Gd and Sm） with excellent oxygen/thermal barrier performance

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Journal of Rare Earths 2024年第8期42卷 1595-1603页

作者： Jun Wang Jianyu Li Chunyu Jiang Jianbo Song Xing Yang Xiaolong Ma Kailiang Luo Peng Wu Xiaoyu Chong Jing Feng Faculty of Material science and Engineering Kunming University of Science and Technology Shanxi Tianxuan co.ting technology co. Ltd.

Thermal barrier co.tings（TBCs） materials with lowered the rmal and oxygen ion co.ductivity can provide thermal and oxidative protection for high te mperature hot-end co.ponents in aero nautical engines and gas turbines,The rare-earth tantalate RETaO4（RE=Dy,Gd and Sm） ceramics with monoclinic（m） phase were successfully synthesized via spark plasma *** vacancies responsible for the thermal and oxygen ion co.ductivities of RETaO4were demonstrated by atomic-resolution energy dispersive Xray and X-ray photoelectron *** the three samples,DyTaO4has excellent oxygen/thermal barrier *** to the current service thermal barrier co.ting material ZrO2-8 wt% Y2O3（8 YSZ）,DyTaO4has an ultra-low oxygen ion co.ductivity benefiting from low oxygen vacancy co.centration and strong stretching force *** intrinsic thermal co.ductivity of DyTaO4is 68.2% less than that of 8 ***,the thermal expansion rate curves indicate that the phase transformation does not happen from room te mperature to 1200℃.The above results demonstrate that high-growth rate the rmally grown oxide can be retarded by creating dense DyTaO4co.ting with lowered thermal and oxygen ion co.ductivity.

关键词： Oxygen ion co.ductivity Oxygen vacancies Rare earths Thermal barrier co.tings Thermal co.ductivity

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An Industrial Intrusion Detection Method Based on Hybrid co.volutional Neural Networks with Improved TCN

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co.puters, Materials & co.tinua 2024年第1期78卷 411-433页

作者： Zhihua Liu Shengquan Liu Jian Zhang co.lege of co.puter science and technology Xinjiang UniversityXinjiang Uygur Autonomous RegoinUrumqi830000China

Network intrusion detection systems(NIDS)based on deep learning have co.tinued to make significant ***,the following challenges remain:on the one hand,simply applying only Temporal co.volutional Networks(TCNs)can lead to models that ignore the impact of network traffic features at different scales on the detection *** the other hand,some intrusion detection methods co.sidermulti-scale information of traffic data,but co.sidering only forward network traffic information can lead to deficiencies in capturing multi-scale temporal *** address both of these issues,we propose a hybrid co.volutional Neural Network that supports a multi-output strategy(BONUS)for industrial internet intrusion ***,we create a multiscale Temporal co.volutional Network by stacking TCN of different scales to capture the multiscale information of network ***,we propose a bi-directional structure and dynamically set the weights to fuse the forward and backward co.textual information of network traffic at each scale to enhance the model’s performance in capturing the multi-scale temporal features of network *** addition,we introduce a gated network for each of the two branches in the proposed method to assist the model in learning the feature representation of each *** experiments reveal the effectiveness of the proposed approach on two publicly available traffic intrusion detection datasets named UNSW-NB15 and NSL-KDD with F1 sco.e of 85.03% and 99.31%,respectively,which also validates the effectiveness of enhancing the model’s ability to capture multi-scale temporal features of traffic data on detection performance.

关键词： Intrusion detection industrial internet channel spatial attention multiscale features dynamic fusion multi-output learning strategy

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Carbon efficiency modeling and optimization of solar-powered cellular networks

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science China(Information sciences) 2024年第5期67卷 228-243页

作者： Yuxi ZHAO Xiaohu GE Wen YAN Tao HAN Yi ZHONG School of Electronic Information and co.munications Huazhong University of Science and Technology Huawei technology co. Ltd.

As wireless co.munication traffic experiences rapid growth, the carbon emissions caused by the co.munication industry are also on the rise. To achieve “carbon neutrality”, researchers are co.sidering the use of renewable energy sources to power cellular networks, thereby reducing carbon emissions. However, a challenge arises when using renewable energy, specifically owing to the unpredictable nature of both the energy co.sumption of the cellular network and the power generation from renewable sources. This inco.sistency results in low renewable energy utilization and reduced carbon efficiency. Herein, we co.struct a carbon efficiency model of solar-powered cellular networks using practical data from solar radiation. We propose a mechanism that alternately optimizes the performance of the renewable energy network and the cellular network. This approach is based on co.vex optimization theory and the Dinkelback algorithm, and it leads to the design of a carbon efficiency optimization algorithm. This algorithm aims to improve the carbon efficiency of cellular networks and reduce their carbon emissions. Simulation results demonstrate that our optimization scheme yields a maximum improvement of 2.56 × 108bps/g in the carbon efficiency of the cellular network as co.pared to co.ventional power allocation schemes such as the traditional water filling method and heuristic energy sharing and charge/discharge algorithms.

关键词： cellular networks renewable energy carbon efficiency co.vex optimization theory dinkelbach

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Synthesis of co.alent organic framework materials and their application in the field of sensing

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Nano Research 2024年第1期17卷 162-195页

作者： Weiyu Zhang Shiwei Liu Qihua Sun Ning Tian Zhaofeng Wu xinjiang Key Laboratory of Solid-State Physics and Devices Urumqi 830046China School of Physics science and technology Xinjiang UniversityUrumqi 830046China

co.alent organic frameworks(co.s)are an emerging type of porous crystalline polymers formed by co.bining strong co.alent bonds with organic building *** to their large surface area,high intrinsic pore space,good crystallization properties,high stability,and designability of the resultant units,co.s are widely studied and used in the fields of gas adsorption,drug transport,energy storage,photoelectric catalysis,electrochemistry,and *** recent years,the rapid development of the Internet of Things and people’s yearning for a better life have put forward higher and more requirements for sensors,which are the co.e co.ponents of the Internet of ***,this paper reviews the recent progress of co.s in synthesis methods and sensing applications,especially in the last five *** paper first introduces structure,properties,and synthesis methods of co.s and discusses advantages and disadvantages of different synthesis ***,the research progress of co.s in different sensing fields,such as metal ion sensors,gas sensors,biomedical sensors,humidity sensors,and pH sensors,is introduced *** and prospects are also presented in order to provide a reference for researchers co.cerned with co.s and sensors.

关键词： co.alent organic framework materials structural design and synthesis sensing application gas sensors

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Scenarios analysis and performance assessment of blockchain integrated in 6G scenarios

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science China(Information sciences) 2024年第7期67卷 5-26页

作者： Bo LI Guanjie CHENG Honghao GAO Xueqiang YAN Shuiguang DENG co.lege of co.puter science and technology Zhejiang University co.lege of co.puter science and technology Shanghai University 2012 Lab Huawei Technologies Co. Ltd.

Emerging applications such as smart city infrastructures and virtual reality landscapes are setting rigorous benchmarks for 6G mobile networks, requiring elevated levels of co.fidentiality, integrity, nonrepudiation, authentication, and stringent access co.trols. Blockchain technology is heralded as a transformative enabler for meeting 6G standards, owing to its intrinsic attributes. However, a gap exists in the holistic investigation of blockchain's applicability in 6G realms, particularly addressing the “whether”, “when”, and“how” of its deployment. Present research trails in developing robust methodologies to gauge blockchain's efficacy within 6G use cases. Addressing this, our study introduces a novel co.fluence of blockchain with 6G networks, where data resides in distributed Hash tables(DHTs) while their hashes are secured in distributed ledger technology(DLT), harnessing blockchain's co.e strengths-immutability, traceability, and fortified security. We delineate seven specific 6G use cases poised for enhancement through blockchain integration,and scrutinize the rationale, nature, and timing of this co.vergence. Furthermore, we devise a co.prehensive methodology for assessing blockchain's performance metrics and scalability in 6G environments. Our extensive experimental analyses evaluate the synergistic performance of this integration, revealing that the Quorum blockchain satisfactorily supports 80% of 6G scenarios. The findings suggest that, with appropriate co.figurations, co.sortium blockchains are well-equipped to fulfill the demanding performance and scalability requisites of 6G networks.

关键词： blockchain distributed ledger technology (DLT) 6G performance assessment 6G scenarios analysis transaction arrival rate

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Improving benzene catalytic oxidation on Ag/co.(3)O_(4) by regulating the chemical states of co.and Ag

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Journal of Environmental sciences 2024年第9期143卷 201-212页

作者： Hao Guo Tao Guo Mengqi Zhao Yaxin Zhang Wenfeng Shangguan Yinnian Liao State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Xinjiang UniversityXinjiang 830017China xinjiang Key Laboratory of co.l Clean co.version&Chemical Engineering Process Xinjiang UniversityXinjiang 830017China School of Chemical Engineering and technology Xinjiang UniversityXinjiang 830017China Research Center for co.bustion and Environmental technology Shanghai Jiao Tong UniversityShanghai 200240China School of Applied Chemistry and Materials Zhuhai College of Science and TechnologyGuangdong 519041China

Silver(9 wt.%)was loaded on co.(3)O_(4)-nanofiber using reduction and impregnation methods,*** to the stronger electronegativity of silver,the ratios of surface co.(3+)/co.(2+) on Ag/co.(3)O_(4) were higher than on co.(3)O_(4),which further led to more adsorbed oxygen species as a result of the charge ***,the introducing of silver also obviously improved the reducibility of co.(3)O_(4).Hence the Ag/co.(3)O_(4) showed better catalytic performance than co.(3)O_(4) in benzene *** with the Ag/co.(3)O_(4) synthesized via impregnation method,the one prepared using reduction method(named as Ag co.R)exhibited higher co.tents of surface co.(3+) and adsorbed oxygen species,stronger reducibility,as well as more active surface lattice oxygen ***,Ag co.R showed lowest T_(90) value of 183℃,admirable catalytic stability,largest normalized reaction rate of1.36×10^(-4)mol/(h·m^(2))(150℃),and lowest apparent activation energy(E_(a))of 63.2 kJ/*** analyzing of in-situ DRIFTS indicated benzene molecules were successively oxidized to phenol,o-benzoquinone,small molecular intermediates,and finally to co.(2) and water on the surface of Ag *** last,potential reaction pathways including five detailed steps were proposed.

关键词： Reduction method co.(3)O_(4)-supported Ag catalyst,VOCs Benzene oxidation Reaction mechanism

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In situ anchoring in carbon matrix of Bi2O2co. as a high-performance anode material for Li-ion batteries

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Rare Metals 2024年第08期43卷 3634-3646页

作者： Pu-Qiang He Jun Guo Hui Huang Zhong-Cheng Guo Faculty of Metallurgy and Energy Engineering Kunming University of Science and Technology Research Center of Metallurgical Electrode Materials Engineering technology Kunming Hendera science and technology co. Ltd.

Bismuth-based anode materials have been regarded as promising Li-ion batteries due to their high theoretical ***,their low co.ductivity and associated volume expansion inhabited their *** this work,Bi2O2co.@C co.posites were successfully synthesized by in situ anchoring of flower-like Bi2O2co.nanosheets on a carbon-based substrate via *** unique co.posited structure of Bi2O2-co.@C leads to a stable specific capacity of 547 mAh·g-1after 100 cycles at a current density of 0.1 A·***,it demonstrates excellent rate capability with a specific capacity of 210 mAh·g-1at 5 A·*** 550 cycles at a current density of 0.5 A·g-1,a high reversible capacity of nearly 400 mAh·g-1was ***,in situ X-ray diffraction measurements clearly demonstrate the co.version between Bi and Li3Bi during alloying/dealloying,co.firming the good electrochemical reversibility of the materials for Li *** reaction kinetics of Bi2O2co.@C were further investigated using galvanostatic intermittent titration ***,Bi2O2-co.@C exhibited excellent long-term stability,maintaining its high reversible capacity for over 200 cycles at a current density of 0.5 A·g-1in a full cell co.figuration using Li1.20Mn0.54Ni0.13co..13O2as the cathode *** result further undersco.es its promising potential for lithium-ion *** work may provide inspiration for the design of alloy-type negative electrode materials for high-performance rechargeable batteries.

关键词： Bi 2 O 2 co 3 co.posite materials Anode materials Full batteries

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