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Effects of carbon content on the microstructure and tensile properties of a low-density steel

international Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 391-401页

作者： Yongxuan Shang Mingyu Fan Shuyong Jiang Zhongwu Zhang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China State Key Laboratory of Metal Material for Marine Equipment and application Iron&Steel Research Institute of Ansteel Group CorporationAnshan 114009China

Carbon can change the phase components of low-density steels and influence the mechanical *** this study,a new method to control the carbon content and avoid the formation ofδ-ferrite by decarburization treatment was *** microstructural changes and mechanical characteristics with carbon content induced by decarburization were systematically ***-Jaoul(C-J)analysis was employed to examine the work hardening characteristics during the tensile *** decarburization by heat treatments,the carbon content within the austenite phase decreased,while Mn and Al were almost unchanged;this made the steel with full austenite transform into the austenite and ferrite dual ***,(Ti,V)C carbides existed in both matrix phase and the mole fraction almost the *** addition,the formation of other carbides *** loss induced a decrease in strength due to the weakening of the carbon solid *** the steel with the single austinite,the deformation mode of austenite was the dislocation planar glide,resulting in the formation of *** the dual-phase steel,the deformation occurred by the dislocation planar glide of austenite first,with the increase in strain,the cross slip of ferrite took place,forming dislocation cells in *** the late stage of deformation,the work hardening of austinite increased rapidly,while that of ferrite increased slightly.

关键词： low-density steels carbon content decarburization strengthening mechanisms work hardening behavior

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Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

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international Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： Chao Tan Junling Lü Chunchi Zhang Dong Liang Lei Yang Zegao Wang College of Materials science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China Electronics Technology Group corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical health,and many other ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with nano-level size,lower power consumption,and accurate ***,few of them has the capability of impulse detection which is a path function,expressing the cumulative effect of the force on the particle over a period of *** we fabricated the flexible polymethyl methacrylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signals(I_(ds))to the detected impulse(I).The applied force was detected and recorded by I_(ds)with a low power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is able to detect and locate the normal force applied on ***,there was almost no performance loss for the device as left in the air for two months.

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array

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Biomass materials for zinc-based sustainable and green energy storage devices:Strategy and mechanism

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Nano Research 2025年第1期18卷 294-314页

作者： Xiaotong Yang Xiaoxin Nie Chenke Tang Yiyang Xiao Qiongguang Li Du Yuan Meng Yao College of Materials science and Engineering Changsha University of Science and TechnologyChangsha 410004China College of Materials science and Engineering Sichuan UniversityChengdu 610065China Anhui Province international Research Center on Advanced Building Materials School of Materials and Chemical EngineeringAnhui Jianzhu UniversityHefei 230601China

As next-generation rechargeable alternatives,zincbased energy storage devices(ZESs)are being intensely explored due to their merits of abundant resource,low cost,safety and environmental ***,ZESs face a succession of critical challenges on pursuing advancing performance,including the stability and kinetics of cathode,stability and transport of zinc electrolyte,reversibility and deep utilization of metallic Zn ***,possessing unique molecular structures with abundant functionals groups,motivates the interdisciplinary field emerging from biomass and aqueous rechargeable *** its high compatibility with ZES design,we here summarize the application of biomass materials in ZESs from the aspects of cathode,electrolyte,membrane/separator and Zn anode,with their corresponding operational mechanisms and attractive functionalities from polymeric ***,the outlooks and perspectives are provided,regarding current challenges and future *** anticipate our minireview paves way on exploring the roles of biomass in aqueous rechargeable batteries.

关键词： zinc biomass materials skeleton/host coating solid-electrolyte interphase(SEI)

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Co/Co_(7)Fe_(3)heterostructures with controllable alloying degree on carbon spheres as bifunctional electrocatalyst forrechargeable zinc-air batteries

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international Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 476-487页

作者： Junkang Chen Yongyue Zhuang Yanxin Qiao Yu Zhang Aihua Yuan Hu Zhou School of Materials science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Exploring efficient and nonprecious metal electrocatalysts of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is crucial for developing rechargeable zinc-air batteries(ZABs).Herein,an alloying-degree control strategy was employed to fabricate nitrogen-doped carbon sphere(NCS)decorated with dual-phase Co/Co_(7)Fe_(3)heterojunctions(CoFe@NCS).The phase composition of materials has been adjusted by controlling the alloying *** optimal CoFe_(0.08)@NCS electrocatalyst displays a half-wave potential of 0.80 V for ORR and an overpotential of 283 mV at 10 mA·cm^(-2)for OER in an alkaline *** intriguing bifunctional electrocatalytic activity and durability is attributed to the hierarchically porous structure and interfacial electron coupling of highly-active Co_(7)Fe_(3)alloy and metallic Co *** the CoFe_(0.08)@NCS material is used as air-cathode catalyst of rechargeable liquid-state zinc-air battery(ZAB),the device shows a high peak power-density(157 mW·cm^(-2))and maintains a stable voltage gap over 150 h,outperforming those of the benchmark(Pt/C+RuO_(2))-based *** particular,the as-fabricated solid-state flexible ZAB delivers a reliable compatibility under different bending *** work provides a promising strategy to develop metal/alloy-based electrocatalysts for the application in renewable energy conversion technologies.

关键词： bifunctional electrocatalysts oxygen reduction reaction oxygen evolution reaction zinc-air battery metal/alloy carbon sphere

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application of the improved dung beetle optimizer,muti-head attention and hybrid deep learning algorithms to groundwater depth prediction in the Ningxia area,China

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Atmospheric and Oceanic science Letters 2025年第1期18卷 18-23页

作者： Jiarui Cai Bo Sun Huijun Wang Yi Zheng Siyu Zhou Huixin Li Yanyan Huang Peishu Zong Collaborative Innovation Center on forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment ChangeNanjing University of Information Science and TechnologyNanjingChina Southern Marine science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina China Meteorological Administration Key Laboratory of Transportation MeteorologyNanjingChina Jiangsu Meteorological Observatory NanjingChina

Due to the lack of accurate data and complex parameterization,the prediction of groundwater depth is a chal-lenge for numerical *** learning can effectively solve this issue and has been proven useful in the prediction of groundwater depth in many *** this study,two new models are applied to the prediction of groundwater depth in the Ningxia area,*** two models combine the improved dung beetle optimizer(DBO)algorithm with two deep learning models:The Multi-head Attention-Convolution Neural Network-Long Short Term Memory networks(MH-CNN-LSTM)and the Multi-head Attention-Convolution Neural Network-Gated Recurrent Unit(MH-CNN-GRU).The models with DBO show better prediction performance,with larger R(correlation coefficient),RPD(residual prediction deviation),and lower RMSE(root-mean-square error).Com-pared with the models with the original DBO,the R and RPD of models with the improved DBO increase by over 1.5%,and the RMSE decreases by over 1.8%,indicating better prediction *** addition,compared with the multiple linear regression model,a traditional statistical model,deep learning models have better prediction performance.

关键词： Groundwater depth Multi-head attention Improved dung beetle optimizer CNN-LSTM CNN-GRU Ningxia

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TROPICAL CYCLONE UNUSUAL INTENSITY AND STRUCTURE CHANGE IN THE WESTERN NORTH PACIFIC OBSERVED BY RECONNAISSANCE AIRCRAFT DURING TPARC/TCS08 AND ITOP/TCS10

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Tropical Cyclone Research and Review 2012年第1期1卷 55-65页

作者： PETER G.BLACK science application international corporation Atmospheric Sciences Division

The combined Tropical Cyclone Structure(TCS-08)and THORPEX Pacific-Asia Regional Campaign(TPARC)field programs during August and September 2008 and the combined Impact of Typhoons on the Ocean in the Pacific(ITOP)and TCS-10 field programs during August,September,and October 2010 have provided unique simultaneous observations of typhoon structure and intensity together with underlying oceanic conditions during rapid intensification and rapid decay events in the northwest Pacific Ocean basin during the tropical cyclone life cycle.A new observational strategy from aircraft reconnaissance,involving combination(’COMBO’)deployments of Global Positioning System(GPS)dropwindsondes and Airborne e Xpendable Bathythermographs(AXBTs)has allowed for simultaneous observations of TC structure and intensity while also observing oceanic eddy structure beneath the *** strategy,together with deployment of drifting buoys and floats ahead of the TC,has led to observations in Super-TYphoon(STY)Jangmi(2008)and STY Megi(2010)that show the ocean control over TC Rapid Intensification(RI)and Rapid Decay(RD)due to pre-existing warm and cold ocean eddy features,as well as the intensity-limiting effects of oceanic’cold wakes’generated by Typhoons(TYs)Fanapi(2010)and Malakas(2010).Observations made during’unusual’track changes in TY Fanapi illustrate how the TC passes over different ocean eddy features than would have occurred with a’normal’straight *** track changes led to unusual intensity changes due to subsequent movement over a warm ocean eddy feature that led to unexpected TC intensification,and this was followed by movement over shallow ocean mixed layers that led to strong’cold wake’*** feature of ocean control then limited Fanapi’s intensification to values well below their Maximum Potential Intensity(MPI).In addition,’COMBO’observations within pre-TC disturbances show contrasting impacts on typhoon development/non-development for cases of strong ocean control and

关键词： Tropical Cyclone Structure Ocean Pacific

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Iterative Learning Control Algorithm with a Fixed Step

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Chinese Journal of Mechanical Engineering 2011年第4期24卷 669-675页

作者： WANG Yan NIU Jianjun School of Transportation science and Engineering Beihang University Beijing 100191 China international Petroleum Exploration and Production corporation China Petroleum ＆ Chemical Corporation Beijing 100083 China

Iterative Learning Control （ILC） captures interests of many scholars because of its capability of high precision control implement without identifying plant mathematical models, and it is widely applied in control engineering. Presently, most ILC algorithms still follow the original ideas of ARIMOTO, in which the iterative-learning-rate is composed by the control error with its derivative and integral values. This kind of algorithms will result in inevitable problems such as huge computation, big storage capacity for algorithm data, and also weak robust. In order to resolve these problems, an improved iterative learning control algorithm with fixed step is proposed here which breaks the primary thought of ARIMOTO. In this algorithm, the control step is set only according to the value of the control error, which could enormously reduce the computation and storage size demanded, also improve the robust of the algorithm by not using the differential coefficient of the iterative learning error. In this paper, the convergence conditions of this proposed fixed step iterative learning algorithm is theoretically analyzed and testified. Then the algorithm is tested through simulation researches on a time-variant object with randomly set disturbance through calculation of step threshold value, algorithm robustness testing,and evaluation of the relation between convergence speed and step size. Finally the algorithm is validated on a valve-serving-cylinder system of a joint robot with time-variant parameters. Experiment results demonstrate the stability of the algorithm and also the relationship between step value and convergence rate. Both simulation and experiment testify the feasibility and validity of the new algorithm proposed here. And it is worth to noticing that this algorithm is simple but with strong robust after improvements, which provides new ideas to the research of iterative learning control algorithms.

关键词： iterative learning control fixed step time variant system simulating study robot control

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Innovative approaches towards an economic fusion reactor

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National science Review 2020年第2期7卷 245-247页

作者： Houyang Guo Francis Y C Thio Michl W Binderbauer Richard J Buttery Thomas R Jarboe Rajesh Maingi John S Sarff Peter C Stangeby Derek A SutherlAND Mickey R Wade Michael C Zarnstorff General Atomics Breakthrough Fusion international corporation

Nuclear fusion potentially offers a clean,environmentally friendly and intrinsically safe energy source with an abundant fuel supply. Magnetic fusion energy research is approaching a new era of fusion power reactor design and construction planning. New physics understanding and powerful predictive tools have become available for improving fusion performance, developing and optimizing various magnetic confinement concepts. Emerging transformative

关键词： Innovative approaches towards an economic fusion reactor

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Synthesis and Characterization of Sphere-like Pt Nanoparticles Supported on DWCNT/WO_3 Nanorods with Electrocatalytic Activity

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Journal of Materials science & Technology 2015年第9期31卷 888-894页

作者： Yanhong Yin Chun'an Ma Ziping Wu Man Zhao Litao Chen Youqun Chu State Key Laboratory Breeding Base for Green Chemistry Synthesis Technology International Science & Technology Cooperation Base of Energy Materials and Application College of Chemical Engineering Zhejiang University of Technology Engineering Research Center of High-efficiency Development and application Technology of Tungsten Resources (Ministry of Education) School of Materials Science and Engineering Jiangxi University of Science and Technology

Tungsten oxide （WO3） nanorods, which were used to load platinum （Pt） nanoparticles, were investi- gated. H2WO4 nanorods with diameters from 10 to 50 nm were obtained when tungsten precursor was added into homogenous double-walled carbon nanotubes （DWCNT） and ethylene glycol （EG） solution. Nanosized rod-like WO3 were achieved after calcination of the DWCNT/H2W04 composite. Sphere-like Pt nanoparticles were loaded on the surface of the nanorods by EG in-situ reduction. Pt particles were isolated by DWCNT/WO3 nanorods and secondary accumulation could be prevented when Pt particles appeared in the DWCNT/WO3 nanorod/EG dispersion solution. Therefore, Pt nanoparticles with mean di- ameters of 2-6 nm could be obtained. Pt-deposited on DWCNT/WO3 nanorods exhibited high electrochemical activity, which could facilitate the low-cost mass production of Pt catalyst.

关键词： PlatinumTungsten oxideDouble-walled carbon nanotubesNanorodsElectrocatalysis

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Reducing the influence of STI on SONOS memory through optimizing added boron implantation technology

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Journal of Semiconductors 2010年第9期31卷 21-24页

作者：徐跃闫锋李志国杨帆王永刚常建光 College of Electronic science & Engineering Nanjing University of Posts and Telecommunications College of Electronic science & Engineering Nanjing University Semiconductor Manufacturing international(Shanghai) corporation

The influence of shallow trench isolation（STI） on a 90 nm polysilicon-oxide-nitride-oxide-silicon structure non-volatile memory has been studied based on *** has been found that the performance of edge memory cells adjacent to STI deteriorates *** compressive stress and boron segregation induced by STI are thought to be the main causes of this *** order to mitigate the STI impact,an added boron implantation in the STI region is developed as a new *** kinds of boron implantation experiments have been implemented to evaluate the impact of STI on edge cells,*** experimental results show that the performance of edge cells can be greatly improved through optimizing added boron implantation technology.

关键词： shallow trench isolation compressive stress boron segregation added boron implantation

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