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High-efficiency Carbonation Modification Methods of Recycled co.rse Aggregates

Journal of Wuhan University of technology(Materials Science) 2024年第2期39卷 386-398页

作者：张美香 YANG Xiaolin 丁亚红 SUN Bo ZHANG Xianggang LÜXiuwen Department of Civil Engineering Henan Polytechnic UniversityJiaozuo 454150China co.lege of Architectural Engineering Xinyu UniversityXinyu 336500China

To solve the problem of only surface carbonation and realize high-efficiency carbonation of recycled co.rse aggregate,the method of carbonated recycled co.rse aggregate with nano materials pre-soaking was first put *** carbonation effect of modified recycled co.rse aggregate with three different carbonation methods was evaluated,and water absorption,apparent density and crush index of modified recycled co.rse aggregate were *** with XRD,SEM,and MIP microsco.ic analysis,the high-efficiency carbonation strengthening mechanism of modified recycled co.rse aggregate was *** experimental results show that,co.pared with the non-carbonated recycled co.rse aggregate,the physical and microsco.ic properties of carbonated recycled co.rse aggregate are *** method of carbonation with nano-SiO_(2) pre-soaking can realize the high-efficiency carbonation of recycled co.rse aggregate,for modified recycled co.rse aggregate with the method,water absorption is reduced by 23.03%,porosity is reduced by 44.06%,and the average pore diameter is 21.82 *** high-efficiency carbonation strengthening mechanism show that the pre-socked nano-SiO_(2) is bound to the hydration product Ca(OH)_(2) of the old mortar with nano-scale C-S-H,which can improve the co.(2) absorption rate,accelerate the carbonation reaction,generate more stable Caco.(3) and nano-scale silica gel,and bond to the dense three-dimensional network structure to realize the bidirectional enhancement of nano-materials and pressurized *** is co.cluded that the method of carbonation with nano-SiO_(2) pre-soaking is a novel high-efficiency carbonation modification of recycled co.rse aggregate.

关键词： recycled co.rse aggregate pressurized carbonation high-efficiency carbonation nano-SiO2 strengthening mechanism

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Study on metal reco.ery process and kinetics of oxidative leaching from spent LiFePO_(4)Li-batteries

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Chinese Journal of Chemical Engineering 2024年第4期68卷 94-102页

作者： Xiaoming Zhang Wen Xie Xiaolei Zhou Wenjie Zhang Jiawei Wen Xin Wang Guoyong Huang Shengming Xu co.lege of New Energy and Materials China University of PetroleumBeijing 102249China State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of PetroleumBeijing 102249China Beijing Spacecrafts Beijing 100094China Ganfeng Lithium Group co. Ltd.Xinyu 338000China Institute of Nuclear and New Energy technology Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Fine Ceramics Tsinghua UniversityBeijing 100084China

A green environmental protection and enhanced leaching process was proposed to reco.er all elements from spent lithium iron phosphate(LiFePO_(4)) lithium *** order to reduce the influence of Al impurity in the reco.ery process,NaOH was used to remove *** impurity removal,the spent LiFePO_(4) cathode material was used as raw material under the H_(2)SO_(4) system,and the pressure oxidation leaching process was adopted to achieve the preferential leaching of *** E-pH diagram of the Fe-P-Al-H_(2)O system can determine the stable region of each element in the reco.ery process of spent LiFePO_(4)*** the optimal co.ditions(500 r·min^(-1),15 h,363.15 K,0.4 MPa,the liquid-solid ratio was 4:1 ml·g^(-1)and the acid-material ratio was 0.29),the leaching rate of Li was 99.24%,Fe,Al,and Ti were 0.10%,2.07%,and 0.03%,*** Fe and P were precipitated and reco.ered as FePO_(4)·2H_(2)*** kinetic analysis shows that the process of high-pressure acid leaching of spent LiFePO_(4) materials depends on the surface chemical *** the life cycle assessment(LCA)of the spent LiFePO_(4) whole reco.ery process,eight midpoint impact categories were selected to assess the impact of reco.ery *** results can provide basic environmental information on production process for recycling industry.

关键词： Spent LiFePO_(4)Li-batteries Oxidative leaching Kinetic study Life cycle assessment

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Geometric quality evaluation of three-dimensional printable co.crete using co.putational fluid dynamics

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Frontiers of Structural and Civil Engineering 2024年第7期18卷 963-976页

作者： Weijiu CUI Haijun SUN Jiangang ZHOU Sheng WANG xinyu SHI Yaxin TAO Department of Civil Engineering Qingdao University of TechnologyQingdao 266000China Innovation Institute for Sustainable Maritime Architecture Research and technology Qingdao University of TechnologyQingdao 266000China Intelligent co.struction Lab Qingdao University of TechnologyQingdao 266000China Shandong Zhaojin Industrial Development co. Ltd.Yantai 264000China Architectural Engineering Institute Weifang Engineering Vocational CollegeWeifang 261000China Qingjian Group co. Ltd.Qingdao 266000China co.lege of Architecture and Urban Planning Qingdao University of TechnologyQingdao 266000China Department of Structural Engineering and Building Materials Ghent UniversityGhent 9000Belgium Institute of Building Materials ETH ZurichZurich 8064Switzerland

The importance of geometrical co.trol of three dimensional(3D)printable co.crete without the support of formwork is widely *** this study,a numerical model based on co.putational fluid dynamics was developed to evaluate the geometrical quality of a 3D printed *** numerical results were co.pared,using image analysis,with physical cross-sectional sawn *** influence of printing parameters(printing speed,nozzle height,and nozzle diameter)and the rheological behavior of printed materials(yield stress),on the geometrical quality of one printed layer was *** addition,the yield zone of the printed layer was analyzed,giving insights on the critical factors for geometrical co.trol in 3D co.crete *** indicated that the developed model can precisely describe the extrusion process,as well as the cross-sectional quality.

关键词： digital fabrication 3D co.crete printing geometric quality co.putational fluid dynamics printing parameters yield stress

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Reco.ery of cathode co.per and ternary precursors from CuS slag derived by waste lithium-ion batteries:Process analysis and evaluation

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Chinese Chemical Letters 2024年第7期35卷 178-182页

作者： Yun Wei Lei Zhou Wenbin Hu Liming Yang Guang Yang Chaoqiang Wang Hui Shi Fei Han Yufa Feng Xuan Ding Penghui Shao Xubiao Luo National-Local Joint Engineering Research Center of Heavy Metals Pollutants co.trol and Resource Utilization Nanchang Hangkong UniversityNanchang 330063China School of Life Science Jinggangshan UniversityJi’an 343009China CAS Key Laboratory of Green Process and Engineering National Engineering Research Center of Green Recycling for Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest co.trol Anhui Agricultural UniversityHefei 230036China jiangxi Ganfeng Recycling technology co.LTD. Xinyu 338004China

The efficient and environmentally friendly recycling technology of waste residue that including abundant heavy metal produced during the reco.ery of lithium batteries has beco.e a research ***,a novelty process of acid leaching-selective electrodeposition-deep impurity removal-regeneration was proposed to reco.ery of the CuS slag,which has been efficient transferred to high purity cathode co.per and co.mercially available ternary *** cathode with a purity of 99.67%was prepared under electrochemical reaction co.ditions at-0.55 V for 2 h.A novel impurity remover-Mn powder,which was used to remove the residual impurities and as a feedstock for the ternary ***,NCM523 was regenerated by *** process is superior to the traditional process in eco.omy,energy co.sumption,co.(2)emissions,product purity and process *** study provides a new approach for solid waste reco.ery and precious metal enrichment.

关键词： CuS slag Electrodeposition Cathode co.per Ternary precursor Solid waste reco.ery

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Method for the real-time detection of tomato ripeness using a phenotype robot and RP-YolactEdge

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International Journal of Agricultural and Biological Engineering 2024年第2期17卷 200-210页

作者： Yuanqiao Wang Wenbo Gou Chuanyu Wang Jiangchuan Fan Weiliang Wen Xianju Lu xinyu Guo Chunjiang Zhao co.lege of Information Engineering Northwest A&F UniversityYangling 712100ShaanxiChina China National Engineering Research Center for Information technology in Agriculture(NERCITA) Beijing 100097China Beijing Key Laboratory of Digital Plant Beijing Research Center for Information Technology in AgricultureBeijing 100097China Beijing PAIDE Science and technology Development co. Ltd.Beijing 100097China

In order to address the challenge of non-destructive detection of tomato fruit ripeness in co.trolled environments,this study proposed a real-time instance segmentation method based on the edge *** method co.bined the principles of phenotype robots and machine vision based on deep learning.A co.pact and remotely co.trollable phenotype detection robot was employed to acquire precise data on tomato *** video data were then processed by using an efficient backbone and the FeatFlowNet structure for feature extraction and analysis of key-frame to non-key-frame mapping from video *** enhance the diversity of training datasets and the generalization of the model,an innovative approach was chosen by using random enhancement ***,the PolyLoss optimization technique was applied to further improve the accuracy of the ripeness multi-class detection *** validation,the method of this study achieved real-time processing speeds of 90.1 fps(RTX 3070Ti)and 65.5 fps(RTX 2060 S),with an average detection accuracy of 97%co.pared to manually measured *** is more accurate and efficient than other instance segmentation models acco.ding to actual testing in a ***,the results of this research can be deployed in edge devices and provide technical support for unmanned greenhouse monitoring devices or fruit-picking robots in facility environments.

关键词： instance segmentation phenotype robot tomato greenhouse-based plant phenotyping ripeness detection

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Prediction model of end-point phosphorus co.tent for BOF based on monotone-co.strained BP neural network

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Journal of Iron and Steel Research International 2022年第5期29卷 751-760页

作者： Kai-xiao Zhou Wen-hui Lin Jian-kun Sun Jiang-shan Zhang De-zheng Zhang Xiao-ming Feng Qing Liu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China School of co.puter and co.munication Engineering University of Science and Technology BeijingBeijing100083China xinyu Iron and Steel co. Ltd.Xinyu338001JiangxiChina

Dephosphorization is essential co.tent in the steelmaking process,and the process after the co.verter has no dephosphorization ***,phosphorus must be removed to the required level in the co.verter *** order to better co.trol the end-point phosphorus co.tent of basic oxygen furnace(BOF),a prediction model of end-point phosphorus co.tent for BOF based on monotone-co.strained backpropagation(BP)neural network was *** the theoretical analysis of the dephosphorization process,ten factors that affect the end-point phosphorus co.tent were determined as the input variables of the *** co.relations between influencing factors and end-point phosphorus co.tent were determined as the co.straint co.dition of the model.200 sets of data were used to verify the accuracy of the model,and the hit ratios in the range of±0.005%and±0.003%are 94%and 74%,*** fit co.fficient of determination of the predicted value and the actual value is 0.8456,and the root-mean-square error is 0.0030;the predictive accuracy is better than that of ordinary BP neural network,and this model has good *** can provide useful reference for real production and also provide a new approach for metallurgical predictive modeling.

关键词： co.verter End-point phosphorus co.tent Monotonic co.straint BP neural network Prediction model Steelmaking

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First Rocketsonde Launched from an Unmanned Semi-submersible Vehicle

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Advances in Atmospheric Sciences 2019年第4期36卷 339-345页

作者： Hongbin CHEN Jun LI Yuejian XUAN Xiaosong HUANG Weifeng ZHU Keping ZHU Wenzheng SHAO Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicChinese Academy of Sciences School of the Earth Science Chinese Academy of Science University co.laborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology jiangxi xinyu guoke technology co. Ltd

The unmanned semi-submersible vehicle(USSV) developed by the unmanned surface vehicle team of the Institute of Atmospheric Physics is an unmanned, rugged, and high-endurance autonomous navigation vessel designed for the co.lection of long-term, co.tinuous and real-time marine meteorological measurements, including atmospheric sounding in the lower troposphere. A series of river and sea trials were co.ducted from May 2016 to November 2017, and the first rocketsonde was launched from the USSV. Real-time meteorological parameters in the marine atmospheric boundary layer(MABL) were obtained, including sea surface temperature, and vertical profiles of the pressure, temperature, relative humidity, wind speed,and wind direction. These data are extremely useful and important for research on air–sea interactions, sea surface heat and latent heat flux estimations, MABL modeling, and marine satellite product validation.

关键词： unmanned semi-submersible vehicle rocketsonde marine meteorological observation marine atmospheric boundary layer

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Stratospheric balloon-based dropsonde technology:Development and preliminary assessment over the Tibetan Plateau

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Atmospheric and Oceanic Science Letters 2021年第3期14卷 30-35页

作者： Jinqiang Zhang Hongbin Chen Yunfei Du Wenzheng Shao Runping Zeng Keping Zhu Yi Liu Yuejian Xuan Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina co.laborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjingChina co.lege of Electronic Engineering Chengdu University of Information TechnologyChengduChina jiangxi xinyu guoke technology co. LtdXinyuChina

To co.plement the atmospheric profile measurements under co.plex geographical environments and extreme weather co.ditions,a stratospheric balloon-based dropsonde technology,which is carried by a stratospheric balloon platform from the Earth's surface to the upper troposphere and lower stratosphere(UTLS)to release the dropsonde for measurements,is independently developed and preliminarily assessed over the Tibetan Plateau(TP)in this *** dropsonde system is mainly co.posed of the dropsonde chamber,dropsonde with a parachute,data receiving and co.munication antennas,dropsonde-releasing device,and GPS(Global Positioning System)*** dropsonde measurements can be sent in real time through satellite co.munication links and by radio signals to a data receiver at the ground co.trol center for storage and processing.A total of eight dropsondes aboard the stratospheric balloon were successfully released during the TP campaign in 2020.A preliminary assessment was co.ducted based on a case co.parison between the dropsonde and radiosonde measurements,which indicated that the dropsonde technology we developed can generally provide reasonable atmospheric ***,further efforts are still required to improve the detection performance of the dropsonde sensors after long-term locating in the UTLS and to assess the accuracy and precision of the detection technology more carefully.

关键词： Dropsonde technology Stratospheric balloon Development Atmospheric profile Tibetan Plateau

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Development status and prospect of co.d chain logistics of fruits,vegetables,and agricultural products based on intelligent technology

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智能化农业装备学报（中英文） 2024年第3期5卷 63-74页

作者： ZHANG Ruizhi LIU Qianyuan HUANG Yuying LIU Bing CHANG Zhiguang WANG Jiaoling Zhongnong guoke(Nanjing)Planning and Design co.Ltd. Nanjing 210014China Nanjing Institute of Agricultural Mechanization Ministry of Agriculture and Rural AffairsNanjing 210014China Key Laboratory of Agro-Products Processing and Storage Ministry of Agriculture and Rural AffairsNanjing 210014China

The co.d chain in the production area of fruits and vegetables is the primary link to reduce product loss and improve product quality,but it is also a weak *** the application of big data technology in co.d chain logistics,intelligent devices,and technologies have beco.e important carriers for improving the efficiency of co.d chain logistics in fruit and vegetable production areas,extending the shelf life of fruits and vegetables,and reducing fruit and vegetable *** have many advantages in fruit and vegetable pre-co.ling,sorting and packaging,testing,warehousing,transportation,and other *** article summarizes the rapidly developing and widely used intelligent technologies at home and abroad in recent years,including automated guided vehicle intelligent handling based on electromagnetic or optical technology,intelligent sorting based on sensors,electronic optics,and other technologies,intelligent detection based on co.puter vision technology,intelligent transportation based on perspective imaging technology,*** analyses and studies the innovative research and achievements of various scholars in applying intelligent technology in fruit and vegetable co.d chain storage,sorting,detection,transportation,and other links,and improves the efficiency of fruit and vegetable co.d chain ***,applying intelligent technology in fruit and vegetable co.d chain logistics also faces many *** challenges of high co.t,difficulty in technological integration,and talent shortages have limited the development of intelligent technology in the field of fruit and vegetable co.d *** solve the current problems,it is proposed that co.ts be co.trolled through independent research and development,technological innovation,and other means to lower the entry threshold for small *** integrating intelligent technology and co.d chain logistics systems to improve data security and system *** the same time,the government

关键词： fruits and vegetables co.d chain logistics automated guided vehicle intelligent handling co.puter vision spectral detection

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Effect of lanthanum co.tent on microstructure and magnetic properties of non-oriented electrical steels

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Journal of Rare Earths 2013年第7期31卷 727-733页

作者：万勇陈伟庆吴绍杰 State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology Beijing technology Center of xinyu Iron and Steel co. Ltd.

The effect of lanthanum co.tent in the range of 04）.01 1 wt.%, on the inclusion size distribution, microstructure, texture and magnetic properties of three non-oriented electrical steels was studied. After final annealing, lanthanum effectively inhibited the precipitation of MnS precipitates in steel, the formations of La2O2S and LaS inclusions not only acted as nuclei of AlN precipitates, but also co.bined with A1203 and formed co.posite inclusions with larger size. Grain size firstly increased and then decreased with lanthanum co.tent increasing. Steel co.taining 0.0066 wt.% lanthanum obtained the largest grain size, the strongest { 110} 〈 110〉 texture and the weakest { 112}〈110〉 texture among all the tested steels. Magnetic flux density firstly increased and then decreased, co.e loss firstly dramatically decreased and then slightly decreased with lanthanum co.tent increasing. Among the three tested steels, steel with 0.0066 wt.% lanthanum demonstrated the best co.prehensive magnetic properties mainly through the development of favorable texture and appropriate final grain size.

关键词： lanthanum non-oriented electrical steel grain size texture magnetic property rare earths

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