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Softening and melting behaviors of ferrous burden in hydrogen-rich blast furnace cohesive zone

Journal of Iron and Steel Research International 2023年第12期30卷 2366-2377页

作者： bin-bin Lyu Guang Wang Fan Yang Hai-bin Zuo Qing-guo Xue Jing-song Wang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China

The changes in the softening and melting behaviors of ferrous burden in the cohesive zone and the characteristics of the slag–iron–coke interface in a blast furnace were investigated by simulating an actual blast furnace under hydrogen-rich *** to the variation in the transient shrinkage of the burden under different atmospheres,the shrinkage start temperature of the sinter was higher than that of the *** negative shrinkage rate of the pellets was greater than that of the ***,the softening start temperature in the blast furnace decreased under hydrogen-rich conditions,giving the blast furnace a broader range of softening *** softening start temperatures of the pellets and sinter decreased from 1102 to 949℃ and 1152 to 1080℃,*** hydrogen-rich traditional blast furnace conditions narrowed the melting zone temperature range and shifted it toward the high-temperature zone,significantly improving the burden layer ***,under the hydrogen-rich oxygen blast furnace conditions,there were a decrease in the melting start temperature,a shift of the melting zone location to the low-temperature zone,and an increase in the burden layer permeability and pressure difference.A comparison of the slag–iron–coke interface characteristics under different atmospheric conditions showed that the carbon content in metallic iron decreased under hydrogen-rich traditional blast furnace conditions compared with traditional blast furnace ***,under hydrogen-rich oxygen blast furnace conditions,the carbon content in metallic iron increased compared with oxygen blast furnace *** findings provide guidance for the development of low-carbon ironmaking processes in blast furnaces.

关键词： Ferrous burden-Hydrogen Softening Melting Cohesive zone Slag-iron-coke interface

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On-line batch production of ferrate with an chemical method and its potential application for greywater recycling with Al(Ⅲ) salt

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Journal of Environmental Sciences 2017年第2期29卷 1-7页

作者： Yarui song bin Men Dongsheng Wang Jianwei Ma Northeast Petroleum University Institute of Civil Engineering and Construction State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Ferrate（Ⅵ ） salt is an oxidant and coagulant for water and wastewater treatment. It is considered as a possible alternative method in greywater treatment. However, challenges have existed in putting ferrate（Ⅵ ） technology into full-scale practice in water and wastewater treatment due to the instability of ferrate solution and high production cost of solid ferrate products. This study demonstrated a new approach of greywater treatment with on-line batch production of Fe（Ⅵ ） to which Fe（Ⅲ ） salt was oxidized at a weak acidity solution. A series of experiments were conducted to investigate the effect of Fe（Ⅵ ） on light greywater（total organic carbon（TOC） = 19.5 mg/L） and dark greywater（TOC = 55 mg/L）treatment under different conditions with varying p H and Fe（Ⅵ ） doses. In addition, the combination use of Fe（Ⅵ ） and Al（Ⅲ ） salts was proved to be more efficient than using the Fe（Ⅵ ） salts alone at greywater recycling. The optimum dosage of Fe（Ⅵ ）/Al（Ⅲ ） salts was 25/25 mg/L for light greywater, 90/60 mg/L for dark greywater, respectively. The TOC values of both light greywater and dark greywater were reduced to less than 3 mg/L with the *** cost for treating greywater was 0.06–0.2 $/ton at ferrate（Ⅵ ） dosage of 25–90 mg/L and0.008–0.024 $/ton at AlCl3 dosage of 25–60 mg/L. The full operating cost needs further assessment before the Fe（Ⅵ ）/Al（Ⅲ ） technology could be implemented in greywater treatment.

关键词： On-line Ferrate Coagulation Oxidation Greywater AlCl3

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An updated review and conceptual model for optimizing WEEE management in China from a life cycle perspective

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Frontiers of Environmental Science & Engineering 2017年第5期11卷 21-32页

作者： Xiaolong song Jingwei Wang Jianxin Yang bin Lu WEEE Research Center of Shanghai Polytechnic University Shanghai 201209 China Shanghai Collaborative Innovation Center for WEEE Recycling Shanghai 201209 China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Waste electrical and electronic equipment （WEEE） is a rapidly growing category of solid waste. China is now facing WEEE problems from both growing domestic generation and illegal imports. Currently, the amount of WEEE formally treated has increased steadily in China. The layout of the formal sector has been basically completed. Meanwhile, by controlling illegal disassembly activities, the informal sector has been gradually transformed to formal one. Beginning with the overview of the WEEE recycling industry in China, this paper first lists the latest progress in WEEE management from such aspects as the new edition of China RollS Directive （Restriction of Hazardous Substances Directive）, the updated WEEE Treatment List, the updated WEEE fund standard, the revised National Hazardous Waste List, and a brand-new plan on extended producer responsibility. In so doing, we elucidate the current challenges on WEEE management in detail： the imbalance between fund levies and subsidies, the gap in the supervision scope, the homogenization of recycling industry and the lack of life cycle approaches. Finally, a conceptual framework for integrated management of WEEE is proposed from a life cycle perspective. Overall, the life cycle management of WEEE includes three aspects： developing life cycle information for decision-making, implementing life cycle engineering with life cycle tools, and improving WEEE legislation based on life cycle thinking. By providing specific operating strategies, this life cycle framework should help to optimize WEEE management in developing countries where legislation is imperfect and the recycling system is relatively immature.

关键词： Waste electrical and electronic equipment E-wasteLife cycle management China

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Secure and reliable computation offloading in blockchain-assisted cyber-physical IoT systems

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Digital Communications and Networks 2022年第5期8卷 625-635页

作者： Dan Wang bin song Yingjie Liu Mingjun Wang The State Key Laboratory of Integrated Services Networks Xidian UniversityXi'an710071China

With the development of the Cyber-Physical Internet of Things System(CPIoTS),the number of Cyber-Physical System(CPS)applications accessed in networks has increased ***-sensitive resource orchestration in CPS applications is extraordinarily essential for maintaining the Quality of Experience(QoE)for *** edge-cloud computing performs effectively in achieving latency-aware resource allocation in CPIoTS,existing methods fail to jointly consider the security and reliability requirements,thereby increasing the process latency of tasks and degrading the QoE of *** paper aims to minimize the system latency of edge-cloud computing coupled with CPS while simultaneously considering the security and reliability *** first consider a time-varying channel model as a Finite-State Markov Channel(FSMC)and propose a distributed blockchain-assisted CPIoTS to realize secure consensus and reliable resource orchestration by offloading computation tasks in edge-cloud ***,we propose an efficient resource allocation algorithm,PPO-SRRA,that optimizes computing offloading and multi-dimension resource(e.g.,communication,computation,and consensus resource)allocation by using a policy-based Deep Reinforcement Learning(DRL)*** experimental results show that the proposed resource allocation scheme can reduce the system latency and ensure consensus security.

关键词： Cyber-physical internet of things system Blockchain Reinforcement learning(RL) Edge-cloud computing

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灵芝发酵茶提取液对小鼠抗疲劳作用的研究

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食用菌学报 2002年第3期9卷 18-21页

作者：林新坚郑永标陈济琛林戎斌蔡海松福建省农科院土肥所福州350013

试验采用BABL/c小鼠 ,按体重随机分为对照组和灵芝发酵茶高 (4.198g/kg)、中(3.35 8g/kg) 、低 (2 .798g/kg)剂量组。连续给样 30d ,末次给样 30min后 ,进行小鼠负重游泳试验与测定血清尿素氮、血乳酸和肝糖原三个生化指标的抗疲劳试验... 详细信息

试验采用BABL/c小鼠 ,按体重随机分为对照组和灵芝发酵茶高 (4.198g/kg)、中(3.35 8g/kg) 、低 (2 .798g/kg)剂量组。连续给样 30d ,末次给样 30min后 ,进行小鼠负重游泳试验与测定血清尿素氮、血乳酸和肝糖原三个生化指标的抗疲劳试验。结果表明。

关键词：灵芝发酵茶提取液小鼠抗疲劳作用茶叶基质

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Effect of atmosphere and basicity on softening-melting behavior of primary slag formation in cohesive zone

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Journal of Iron and Steel Research International 2023年第2期30卷 227-235页

作者： bin-bin Lyu Guang Wang Lian-da Zhao Hai-bin Zuo Qing-guo Xue Jing-song Wang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China

The softening-melting characteristics of ferrous burden play a crucial role in the thickness and position of the cohesive *** influence of the basicity and experimental atmosphere on the softening-melting behavior of primary slag under slag-coke interaction was investigated using in situ visualization *** mechanism was analyzed using the FactSage software,X-ray diffraction,and electron probe *** softening and melting temperatures of the samples increased with increasing basicity under different *** difference between softening and melting temperatures is smaller in a H_(2) atmosphere than in a CO atmosphere;in H_(2) atmosphere,the range of softening zone in the cohesive zone was significantly *** formed low-melting-point FeO-bearing phases decrease when H_(2) was used as the reducing *** addition,according to FactSage calculations,the high content of metallic iron reduced in the H_(2) atmosphere raised the softening temperature of the primary *** also narrowed and moved downward the cohesive zone due to an increase in softening and melting ***,the increase in basicity promoted the decrease in liquid ratio and improved the permeability of cohesive zone.

关键词： Primary slag Cohesive zone Softening-melting behavior Coke bed Interface characteristic

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Effect of Dual-Tasks Walking on Human Gait Patterns

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Journal of Bionic Engineering 2022年第4期19卷 991-1002页

作者： Xiyuan Zhang Ke rong Guangming Chen Aihong Ji Yawei song Lab of Locomotion Bioinspiration and Intelligent Robots College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and Astronautics29 Yudao StreetNanjing 210016China Olympic College Communication University of China NanjingNanjing 211162China Department of Sports Health Sciences Nanjing Sport Institute8 Linggusi RoadNanjing 210014China Centre of Scientific Experiment Nanjing Sport InstituteNanjing 210014China

A human gait pattern conformed to the law of the inverted pendulum and could be described by the movement of its center of mass(COM).A sinusoidal function based on an inverted pendulum was used to plan the COM trajectory of humanoid robots for gait ***,studying the human dual-tasks gait pattern is essential for improving the gait adaptability of humanoid *** well-known humanoid robot prototypes can complete stable walking,running,jumping,and other movements closely mimicking human *** study provides a theoretical reference for the gait planning and design of humanoid robots by comparing differences in the stride time,cadence,step length,step width,stride length,walking speed and COM movement during single-and dual-tasks *** showed no significant difference in the time *** dual-tasks walking,the walking speeds decreased(P=0.001)and the COM sidewise movement increased,indicating an enhancement in the automatic motion rhythm in cognitive *** can easily select new different speeds to better adapt to the competition of attention *** enhance the adaptability of humanoid robots to the COM offset,the independent motion of the hip joint separated from the trunk and lower limbs must be considered in the robot design.

关键词： Gait analysis Kinematics COM trajectory Kinesiology

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Multi-Objective Optimization Design through Machine Learning for Drop-on-Demand Bioprinting

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Engineering 2019年第3期5卷 586-593页

作者： Jia Shi Jinchun song bin song Wen F. Lu School of Mechanical Engineering and Automation Northeastern University Shenyang 110819 China Department of Mechanical Engineering National University of Singapore Singapore 119077 Singapore Singapore Institute of Manufacturing Technology Singapore 637662 Singapore

Drop-on-demand (DOD) bioprinting has been widely used in tissue engineering due to its highthroughput efficiency and cost effectiveness. However, this type of bioprinting involves challenges such as satellite generation, too-large droplet generation, and too-low droplet speed. These challenges reduce the stability and precision of DOD printing, disorder cell arrays, and hence generate further structural errors. In this paper, a multi-objective optimization (MOO) design method for DOD printing parameters through fully connected neural networks (FCNNs) is proposed in order to solve these challenges. The MOO problem comprises two objective functions: to develop the satellite formation model with FCNNs;and to decrease droplet diameter and increase droplet speed. A hybrid multi-subgradient descent bundle method with an adaptive learning rate algorithm (HMSGDBA), which combines the multisubgradient descent bundle (MSGDB) method with Adam algorithm, is introduced in order to search for the Pareto-optimal set for the MOO problem. The superiority of HMSGDBA is demonstrated through comparative studies with the MSGDB method. The experimental results show that a single droplet can be printed stably and the droplet speed can be increased from 0.88 to 2.08 m·s^-1 after optimization with the proposed method. The proposed method can improve both printing precision and stability, and is useful in realizing precise cell arrays and complex biological functions. Furthermore, it can be used to obtain guidelines for the setup of cell-printing experimental platforms.

关键词： Drop-on-demand printing Inkjet Gradient descent multi-objective optimization Fully connected neural networks

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茯苓发酵茶利尿作用初探

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食用菌学报 2003年第1期10卷 57-58页

作者：陈济琛郑永标林新坚林戎斌蔡海松福建省农科院土壤肥料研究所福州350013

试验采用SD雄性大鼠 ,按体重随机分为对照组和高 ( 5 .5 3g kg)、中 ( 4 .4 2 g kg)、低( 3.69g kg)三个剂量组。采用代谢笼养法。结果表明。

关键词：茯苓发酵茶利尿作用代谢笼养法剂量

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Effect of Nanoscale Cu-Riched Clusters on Strength and Impact Toughness in a Tempered Cu-Bearing HSLA Steel

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Acta Metallurgica Sinica(English Letters) 2022年第4期35卷 537-550页

作者： Yubin Du Xiaofeng Hu Yuanyuan song Yangpeng Zhang Lijian rong CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

The effect of Cu-riched clusters on strength and impact toughness in a tempered Cu-bearing high-strength low-alloy(HSLA)steel is investigated. With increasing the tempering temperature, it is found that the yield strength increases firstly, achieving the maximum value(~ 1053 MPa) at the tempering temperature of 450 ℃, and then decreases significantly with the rise of tempering temperature. The tempering temperature-dependent yield strength is closely related to the precipitation of Cu-riched clusters. When tempering at 450 ℃, the peak strength will be reached as the nanoscale Cu-riched clusters with small size and high number density will cause a strong precipitation strengthening(~ 492 MPa) due to the dislocation shearing mechanism. However, the Cu-riched clusters will coarsen with further increasing tempering temperature, resulting in obvious decrement of yield strength owing to the dislocation bypassing mechanism. Compared with the yield strength,the variation in impact energy displays an inverse tendency and the impact energy is only 7 J for the sample tempered at 450 ℃. The fracture mode can be well explained by the competition between the cleavage fracture strength( σ F) and “yield strength”( σ Y). Although transgranular cleavage fracture can be found in samples tempered at 450 and 550 °C, the crack propagation along the lath boundaries is prevented in the sample tempered at 550 ℃. The reason is that the number density of Cu-riched clusters at lath boundaries decreases and the segregation of Mo element at the lath boundaries is induced,which will increase the bonding energy.

关键词： High-strength low-alloy(HSLA)steel Cu-riched cluster Strengthening mechanism Lath boundary Impact energy

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