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Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent liCoO_(2)cathode material

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie Shi Changle Hou Jingjing Dong Dong Chen jianzhong li Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(liBs),properly recycling spent liBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of liB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to liCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/liCoO_(2)mass ratio of 3:1,the leaching efficiency of li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in liCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of liB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

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EFFECTS OF SURFACE CURVATURES ON HYDRAUliC CHARACTERISTICS AND TURBULENT BOUNDARY LAYER

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Journal of Hydrodynamics 1992年第1期4卷 98-105页

作者： Niu, Zhengming li, jianzhong Shaanxi Inst of Mechanical Engineering Xi'an China

Hydraulic characteristics of turbulent boundary layer of bucket are very important for hydraulic engineering designs. Some hydraulic measurements for the bucket of modeling overflow dams have been completed. The effects of surface curvatures of the bucket on velocity, pressure and turbulent boundary layer have been systematically investigated. The bucket was specially designed using different surface curvatures with seven radii. The results have shown that the effects of the surface curvatures on the velocity distributions are not proportional and the centrifugal pressure coefficient has a transitional quality. A definition of the turbulent layer thickness of the bucket was suggested and the development of the turbulent layer was indicated experimentally. It is found that the maximum value of the relative boundary layer thickness appears about 0.25 of relative arc length.

关键词： Flow of Fluids Boundary Layer

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A survey of uncertain data management

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Frontiers of Computer Science 2020年第1期14卷 162-190页

作者： lingli li Hongzhi WANG jianzhong li Hong GAO Department of Computer Science and Technology Heilongjiang UniversityHeilongjiang 150001China Department of Computer Science and Technology Harbin Institute of TechnologyHeilongjiang 150001China

Uncertain data are data with uncertainty information,which exist widely in database *** recent years,uncertainty in data has brought challenges in almost all database management areas such as data modeling,query representation,query processing,and data *** is no doubt that uncertain data management has become a hot research topic in the field of data *** this study,we explore problems in managing uncertain data,present state-of-the-art solutions,and provide future research directions in this *** discussed uncertain data management techniques include data modeling,query processing,and data mining in uncertain data in the forms of relational,XML,graph,and stream.

关键词： uncertain data probabilistic database probabilistic XML semi-structured data data stream

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Influence of Nb^(5+) Doping on Structure and Electrochemical Properties of Spinel li_(1.02)Mn_2O_4

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Journal of Materials Science & Technology 2012年第9期28卷 817-822页

作者： jianzhong li Yanwen Tian Chaqing Xu School of Material and Metallurgy Northeastern UniversityShenyang 110819China

The li1.02NbxMn2-xO4 （x=0, 0.005, 0.01, 0.0：2, 0.04 and 0.1） materials were prepared by solid-state reaction method in which li2CO3, electrolytic MnO2 and Nb2O5 were used as reactants. The influences of the Nb5＋ doping on structure, morphology and electrochemical performance were systemically investigated by means of X-ray diffraction （XRD）, scanning electron microscopy （SEM）, cyclic voltammetry （CV） and AC impedance. XRD test showed that the prepared samples had single spinel structure although there was impurity phase of liNbO3 existing in li1.02NbxMn2-xO4 phase after Nb5＋ doping. The doped materials with Nb5＋ had smaller lattice parameters and crystal volume compared with pristine li1.02Mn2O4. The endurance of overcharge was largely improved. In addition, the small amount of Nb5＋ doping could increase the material conductivity.

关键词： lithium-ion battery Cathode material Nb-doping Cyclic voltammograms

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Damage investigation of girder bridges under the Wenchuan earthquake and corresponding seismic design recommendations

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Earthquake Engineering and Engineering Vibration 2008年第4期7卷 337-344页

作者： li jianzhong Peng Tianbo Xu Yan State Key Lab for Disaster Reduction in Civil Engineering Tongji University Shanghai 200092 China

An investigation of girder bridges on National Highway 213 and the Doujiangyan-Wenchuan expressway after the Wenchuan earthquake showed that typical types of damage included： span collapses due to unseating at expansion joints; shear key failure; and damage of the expansion joint due to the slide-induced large relative displacement between the bottom of the girder and the top of the laminated-rubber bearing. This slide, however, can actually act as a form of isolation for the substructure, and as a result, the piers and foundation of most of the bridges on state route 213 suffered minor damage. The exception was the Baihua Bridge, which suffered severe damage. Corresponding seismic design recommendations are presented based on this investigation.

关键词： Wenchuan earthquake bridge damage investigation seismic design recommendation

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Interaction Dynamics Characteristics of Detonation Waves with Coolant Flow in a Hydrogen Fuelled Detonation Chamber

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Transactions of Nanjing University of Aeronautics and Astronautics 2016年第6期33卷 -页

作者： li jianzhong Yuan li Wang Jiahua Jiangsu Province Key Laboratory of Aerospace Power System Nanjing University of Aeronautics and Astronautics School of National Defense Engineering PLA University of Science and Technology

To analyze the dynamic interaction between detonation waves and coolant flow in a hydrogen fuelled detonation chamber,a hydrogen fuelled detonation chamber with a cooled liner was designed and a simulation model was *** explicit high-resolution total variation diminishing(TVD)scheme was developed to solve the two-dimensional Euler equations implemented with an augmented reduced mechanism of the hydrogen/air mixture.A point-implicit method was used to solve the numerical stiffness of the chemical reaction source *** interaction between detonative was and coolant flow were *** interaction dynamics between detonation waves and coolant flow in a detonation chamber were *** results indicated that there were some negative interaction effects between detonation waves and coolant flow.

关键词： pulse detonation engine detonation wave augmented reduced mechanism numerical simulation

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Double deck bridge behavior and failure mechanism under seismic motions using nonlinear analyzes

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Earthquake Engineering and Engineering Vibration 2013年第3期12卷 447-461页

作者： Shirin Alali li jianzhong Guo Guanzhong Department of Civil Engineering Tongji University

This paper investigates the behavior and the failure mechanism of a double deck bridge constructed in China through nonlinear time history analysis. A parametric study was conducted to evaluate the influence of different structural characteristics on the behavior of the double deck bridge under transverse seismic motions, and to detect the effect of bi- directional loading on the seismic response of this type of bridge. The results showed that some characteristics, such as the variable lateral stiffness, the foundation modelling, and the longitudinal reinforcement ratio of the upper and lower columns of the bridge pier bents have a major impact on the double deck bridge response and its failure mechanism under transverse seismic motions. It was found that the soft story failure mechanism ：is not unique to the double deck bridge and its occurrence is related to some conditions and structural characteristics of the bridge structure. The analysis also showed that the seismic vulnerability of the double deck bridge under bi-directional loading： was severely increased compared to the bridge response under unidirectional transverse loading, and out-of-phase movements were triggered between adjacent girders.

关键词： double deck bridge seismic response nonlinear time history analysis soft story mechanism bidirectional motion

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An improved creep model for unsaturated reticulated red clay

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第11期16卷 4754-4768页

作者： Chuang Zhang Junhui Zhang jianzhong li Key Laboratory of Special Environment Road Engineering of Hunan Province Changsha University of Science and TechnologyChangsha410114China School of Traffic and Transportation Engineering Changsha University of Science and TechnologyChangsha410114China Department of Architecture and Civil Engineering City University of Hong KongChina School of Geosciences and Info-Physics Central South UniversityChangsha410083China

Establishment of a creep model is an important method to analyze the relationship between soil creep deformation and time,and the element model is widely used for studying soil ***,the element creep model is employed for fitting saturated soil,and the mechanical element model is generally linear,which cannot well fit the nonlinear deformation of the soil with time in *** creep process of the soil is not only time-dependent,but also related to the deviatoric stress ***,the fractional calculus theory and a parameter n reflecting the effect of deviatoric stress level on the creep properties of the soil were introduced into the element model,and the fractional qBurgers creep model was established by using the fractional Koeller dashpot and Caputo fractional *** proposed model was used to fit the triaxial test data of reticulated red clay under different net confining pressures and matric suctions by unsaturated triaxial *** proposed model can well describe the nonlinearity of unsaturated reticulated red clay,has memory and global correlation to the creep development process of unsaturated reticulated red clay,and has clear physical *** functional relationships of the model parameters with the matric suction,net confining pressure and deviatoric stress level were deduced,so that the creep curves of unsaturated reticulated red clay can be obtained for any conditions,which is of great value for the study of unsaturated soils.

关键词： Fractional calculus Creep model Burgers Parameter study Unsaturated reticulated red clay

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Mining Conditional Functional Dependency Rules on Big Data

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Big Data Mining and Analytics 2020年第1期3卷 68-84页

作者： Mingda li Hongzhi Wang jianzhong li the Department of Computer Science University of CaliforniaLos AnglesCA 90095USA the Department of Computer Science and Technology Harbin Institute of TechnologyHarbin 150000China

Current Conditional Functional Dependency(CFD)discovery algorithms always need a well-prepared training *** condition makes them difficult to apply on large and low-quality *** handle the volume issue of big data,we develop the sampling algorithms to obtain a small representative training *** design the fault-tolerant rule discovery and conflict-resolution algorithms to address the low-quality issue of big *** also propose parameter selection strategy to ensure the effectiveness of CFD discovery *** results demonstrate that our method can discover effective CFD rules on billion-tuple data within a reasonable period.

关键词： data mining conditional functional dependency big data data quality

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Diversification on big data in query processing

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Frontiers of Computer Science 2020年第4期14卷 135-154页

作者： Meifan ZHANG Hongzhi WANG jianzhong li Hong GAO Department of Computer Science and Technology Harbin Institute of TechnologyHarbin150001China

Recently,in the area of big data,some popular applications such as web search engines and recommendation systems,face the problem to diversify results during query *** this sense,it is both significant and essential to propose methods to deal with big data in order to increase the diversity of the result *** this paper,we firstly define the diversity of a set and the ability of an element to improve the overall *** on these definitions,we propose a diversification framework which has good performance in terms of effectiveness and ***,this framework has theoretical guarantee on probability of ***,we design implementation algorithms based on this framework for both numerical and string ***,for numerical and string data respectively,we carry out extensive experiments on real data to verify the performance of our proposed framework,and also perform scalability experiments on synthetic data.

关键词： diversification query processing big data

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