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A review of functions and mechanisms of clay soil conditioners and catalysts in thermal remediation compared to emerging photo-thermal catalysis

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Journal of Environmental Sciences 2025年第1期147卷 22-35页

作者： Juan Zhang Shuo Wang Xin Wang Wentao Jiao Minghua Zhang Fujun Ma State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China College of Agricultural and Environmental Sciences University of CaliforniaDavisCA 95616USA State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

High temperatures and providing sufficient time for the thermal desorption of persistent organic pollutants(POPs)from contaminated clay soils can lead to intensive energy ***,this article provides a critical review of the potential additives which can improve soil texture and increase the volatility of POPs,and then discusses their enhanced mechanisms for contributing to a green ***-based additives have been used to reduce plasticity of bentonite clay,absorb water and replenish system *** contrast,non-Ca-based additives have been used to decrease the plasticity of kaolin *** soil structure and soil plasticity can be changed through cation exchange and flocculation *** transitionmetal oxides and alkalimetal oxides can be applied to catalyze and oxidize polycyclic aromatic hydrocarbons,petroleum and emerging *** this system,reactive oxygen species(•O_(2)^(-)and•OH)are generated fromthermal excitation without strong chemical ***,multiple active ingredients in recycled solid wastes can be controlled to reduce soil plasticity and enhance thermal ***,the alkali,nano zero-valent iron and nano-TiN can catalyze hydrodechlorination of POPs under reductive ***,photo and photo-thermal catalysis are discussed to accelerate replacement of fossil fuels by renewable energy in thermal remediation.

关键词： Persistent organic contaminants Clay soils Thermal remediation Soil conditioning Synergistic catalysis

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Competitive behaviors between tungsten and iron in TBP-HCl-H_(2)O extraction system

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Transactions of Nonferrous Metals Society of china 2025年第3期35卷 990-999页

作者： Li-qin dENG Xu-heng LIU Xing-yu CHEN Jiang-tao LI Li-hua HE Feng-long SUN Zhong-wei ZHAO School of Metallurgy and Environment Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Metallurgy and Material Processing of Rare Metals Central South UniversityChangsha 410083China

The distribution and competitive behaviors of phosphotungstic acid and ferric chloride in the TBP-HCl-H_(2)O system were investigated by controlling the extractant concentration and the solution *** results revealed that phosphotungstic acid exhibited a strong affinity for TBP with decreasing TBP *** acidity significantly improved the W extraction efficiency with TBP,and the lower Cl^(-)concentration reduced the extraction efficiency of *** the organic phase approached saturation point,phosphotungstic acid competitively displaced Fe to combine with *** hydrogen bond structure(P=O·HO-P-W-O)between phosphotungstic acid and TBP was characterized by FT-Ir,and the salting-out effect induced by FeCl_(3) was *** summary,high acidity is beneficial for exhaustive extraction of W,and an effective W/Fe separation can be achieved by reducing the concentrations of TBP and Cl^(-).

关键词： extraction tri-butyl phosphate tungsten/iron separation distribution equilibrium competitive behavior

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Quantitative method and influencing factors analysis of demand response performance of air conditioning load with rebound effect

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Building Simulation 2025年第2期18卷 295-320页

作者： ran Wang Xiaoyue Xin Jiatao Liu Shilei Lu Yongjun Sun Wenduan Zhao School of Environmental Science and Engineering Tianjin UniversityTianjin300072China Tianjin Key Laboratory of Built Environment and Energy Application Tianjin UniversityTianjinChina Department of Architecture and Civil Engineering City University of Hong KongHong KongChina

Under the emerging trend of the new power systems,enhancing the energy flexibility of air conditioning loads to promote electricity demand response is crucial for regulating the real-time *** a typical temperature-controlled loads,air conditioning loads can generate rebound effect when participating in demand response,resulting in sudden load increases and posing risks to grid ***,the existing research mainly focuses on the energy flexibility,which leads to an imperfect demand response mechanism and thus affects the optimal scheduling ***,the study proposes a comprehensive quantification method in view of rebound effect for the demand response performance of air conditioning loads,by using probability distribution,Latin hypercube sampling,Monte Carlo simulation,and scenario analysis *** demand response event was divided into response phase and recovery phase,and by considering energy flexibility during the response phase and rebound effect during the recovery phase,three dimensionless evaluation indexes for comprehensive demand response performance were *** this quantification method,the impact patterns of three types of random variables were compared,including meteorological,design variables,and control ***,considering the differences in building types(office and hotel buildings)and building capacities(small,medium,and large),the effectiveness of air conditioning load participation in demand response measures in different building application scenarios was *** results show that the influence of the design variables on the response performance is less than that of the control variables,but significant,reaching 45%compared to the control ***,the influence varies with building type,capacity and climate zone,and building demand response design has more potential in the following scenarios:the cold climate,the hot summer and cold winter climate,the medium building and the

关键词： demand response air conditioning load energy flexibility rebound effect parameter analysis scenario analysis

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A Normalizing Flow-Based Bidirectional Mapping residual Network for Unsupervised defect detection

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Computers, Materials & Continua 2024年第2期78卷 1631-1648页

作者： Lanyao Zhang Shichao Kan Yigang Cen Xiaoling Chen Linna Zhang Yansen Huang School of Mechanical Engineering Guizhou UniversityGuiyang550025China School of Computer Science and Engineering Central South UniversityChangsha410083China School of Computer and Information Technology Beijing Jiaotong UniversityBeijing100044China College of Civil Engineering Guizhou UniversityGuiyang550025China Guizhou Lianjian Civil Engineering Quality Inspection Monitoring Center Co. Ltd.Guiyang550025China

Unsupervised methods based on density representation have shown their abilities in anomaly detection,but detection performance still needs to be ***,approaches using normalizing flows can accurately evaluate sample distributions,mapping normal features to the normal distribution and anomalous features outside ***,this paper proposes a Normalizing Flow-based Bidirectional Mapping residual Network(NF-BMr).It utilizes pre-trained Convolutional Neural Networks(CNN)and normalizing flows to construct discriminative source and target domain feature ***,to better learn feature information in both domain spaces,we propose the Bidirectional Mapping residual Network(BMr),which maps sample features to these two spaces for anomaly *** two detection spaces effectively complement each other’s deficiencies and provide a comprehensive feature evaluation from two perspectives,which leads to the improvement of detection *** experimental results on the MVTec Ad and dAGM datasets against the Bidirectional Pre-trained Feature Mapping Network(B-PFM)and other state-of-the-art methods demonstrate that the proposed approach achieves superior *** the MVTec Ad dataset,NF-BMr achieves an average AUrOC of 98.7%for all 15 ***,it achieves 100%optimal detection performance in five *** the dAGM dataset,the average AUrOC across ten categories is 98.7%,which is very close to supervised methods.

关键词： Anomaly detection normalizing flow source domain feature space target domain feature space bidirectional mapping residual network

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Using dNN-Compensator Coupling Pd-Controller Strategy Control Two-Wheeled robots Upright Motion Balance

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JOUrNAL OF FIELd rOBOTICS 2024年第0期

作者： Tang, Zhaojia Han, Yu Wang, Ping Sun Yat Sen Univ Sch Intelligent Syst Engn Shenzhen Peoples R China Guangdong Prov Key Lab Fire Sci & Intelligent Emer Guangzhou Peoples R China

Aiming at the problem that the two-wheeled mobile self-balancing robot (TWMSr) is challenging to control balance when TWMSr drives on uneven surface road, this study adds a dNN-compensator specially used to curb the TWMSr's toppling based on the traditional PId motion balance control system. A coupling function couples the control value between the Pd-controller and the dNN-compensator. Its effect is that when the Pd-controller's output value is insufficient to maintain the TWMSr's balance, the dNN-compensator will compensate the Pd-controller's output. The experimental results show that using our dNN-compensator coupling Pd-controller balance control strategy to control the TWMSr movement on uneven surface road can maintain the TWMSr drive stability;compared to traditional Pd-controller, our control strategy braking performance is better, and the pitch angle (phi $\varphi $) fluctuation range is smaller, TWMSr topple over is difficult.

关键词： balance compensator balance controller field robot two-wheeled mobile self-balancing robot unstructured terrain environment

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data-driven Predictive Voltage Control for distributed Energy Storage in Active distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第5期10卷 1876-1886页

作者： Yanda Huo Peng Li Haoran Ji Hao Yu Jinli Zhao Wei Xi Jianzhong Wu Chengshan Wang School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China Digital Power Grid Research Institute China Southern Power GridGuangzhou 510630China School of Engineering Cardiff UniversityCardiff CF243AAU.K.

Integration of distributed energy storage(dES)is beneficial for mitigating voltage fluctuations in highly distributed generator(dG)-penetrated active distribution networks(AdNs).Based on an accurate physical model of AdN,conventional model-based methods can realize optimal control of ***,absence of network parameters and complex operational states of AdN poses challenges to model-based *** paper proposes a data-driven predictive voltage control method for ***,considering time-series constraints,a data-driven predictive control model is formulated for dES by using measurement ***,a data-driven coordination method is proposed for dES and dGs in each *** boundary information interaction,voltage mitigation effects can be improved by interarea coordination ***,control performance is tested on a modified IEEE 33-node test *** studies demonstrate that by fully utilizing multi-source data,the proposed predictive control method can effectively regulate dES and dGs to mitigate voltage violations.

关键词： distribution network distributed energy storage(dES) distributed generators(dGs) data-driven predictive voltage control

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Multi-point impact behavior and the relationship between CAI strength and dBIP of PMI foam sandwich structures

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Chinese Journal of Aeronautics 2024年第10期37卷 265-274页

作者： keyu ZHU Xitao ZHENG Jiaming SUN Guoyue WANG Leilei YAN School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

Sandwich structures are vulnerable to multi-point impacts,and such impacts can result in a reduction in residual strength even catastrophic ***,the multi-point impact behaviors of PMI foam sandwich structure are investigated and studied using experimental and numerical coupled *** impact energy levels and five distances Between Impact Positions(dBIP)are considered in details,and representative impact characteristics are compared to reveal the association between Compression After Impact(CAI)strength and *** indicate that the interference between the multi-point impact events has a dominant effect on CAI strength when dBIP is small,and the variation in bending stiffness induced by the boundary effect is the dominant factor affecting CAI strength when dBIP ranges from 20 mm to 60 *** addition,matrix damage represents the primary damage mode in multi-point impact,and the calculated ratio of energy absorbed by the top face sheet and honeycomb core,in relation to the total absorbed energy,serves as a clear indicator of the damage severity experienced by both *** work is enlightening for the structural design of impact-resistant composites.

关键词： Multi-point impact damage mechanism Interference effect CAI strength Numerical method

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Superconducting states in La_(3)Ni_(2)O_(7) with a parallel magnetic field

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Science china(Physics,Mechanics & Astronomy) 2025年第6期68卷 187-194页

作者： Tianyang Xie Wei Zhu School of Physics Zhejiang UniversityHangzhou 310027China School of Science Westlake UniversityHangzhou 310024China

Since the discovery of a superconducting state in La_(3)Ni_(2)O_(7) with Tc=80 K under high pressure,numerous experimental and theoretical studies have been initiated on this *** this paper,we study the candidate superconducting states in this system,i.e.,interlayer s-wave pairing and intralayer d-wave pairing,in response to the parallel magnetic *** find that the interlayer s-wave state effectively screens the parallel magnetic field,thereby forming a Fulde-Ferrell(FF)***,the intralayer d-wave state cannot efficiently screen the magnetic field,leading to minor perturbations in the spatial distribution of the order *** propose a method utilizing Josephson junctions to distinguish these two distinct superconducting *** findings are anticipated to enrich the understanding of superconducting phases.

关键词： superconductivity pairing symmetries magnetic field

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Blockchain based federated learning for intrusion detection for Internet of Things

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Frontiers of Computer Science 2024年第5期18卷 109-119页

作者： Nan SUN Wei WANG Yongxin TONG Kexin LIU School of Cyber Science and Technology Beihang UniversityBeijing 100191China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Zhongguancun Laboratory Beijing 100094China School of Computer Science and Engineering Beihang UniversityBeijing 100191China

In Internet of Things(loT),data sharing among different devices can improve manufacture efficiency and reduce workload,and yet make the network systems be more vulnerable to various intrusion *** has been realistic demand to develop an efficient intrusion detection algorithm for connected *** of existing intrusion detection methods are trained in a centralized manner and are incapable to identify new unlabeled attack *** this paper,a distributed federated intrusion detection method is proposed,utilizing the information contained in the labeled data as the prior knowledge to discover new unlabeled attack ***,the blockchain technique is introduced in the federated learning process for the consensus of the entire *** results are provided to show that our approach can identify the malicious entities,while outperforming the existing methods in discovering new intrusion attack types.

关键词： intrusion detection federated learning new attacks discovering blockchain

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regulating fracture behaviors and mechanical properties of sintered Nd-Fe-B magnet by reconstructing grain boundaries

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rArE METALS 2025年第5期44卷 3351-3361页

作者： Bao, Xiao-Qian Yu, Ying Wang, Zi-Hao Gao, Shuo Yu, Hai-Jun Guan, Sheng-En Li, Ji-Heng Qin, Ming-Li Gao, Xue-Xu Univ Sci & Technol Beijing State Key Lab Adv Met & Mat Beijing 100083 Peoples R China

In this paper, the fracture behaviors and interface stresses of sintered Nd-Fe-B magnets were investigated. It was revealed that cracks propagated along the interfaces of Nd2Fe14B/Nd2Fe14B, Nd2Fe14B/Nd-rich phases and within Nd-rich phases. The misfits between 2:14:1 and Nd-rich phases were quantitatively determined, reflecting the concentration of interface stresses in magnet. Grain boundaries of magnet were reconstructed by diffusing Tb-containing and Tb-free sources, respectively. The Tb-rich shells at extensive layers of 2:14:1 grains caused lattice distortion, i.e., internal stresses, resulting in the crack mode changing from intergranular to transgranular in near surfaces of Tb-containing diffused magnets. Therefore, the bending strengths were deteriorated although the coercivities were apparently enhanced. In the case of Tb-free Pr-Cu diffused magnet, the Pr and Cu elements were enriched at grain boundaries, and the misfits between 2:14:1 and Nd-rich phases were declined, lowering interface stresses and strengthening grain boundaries. The mechanical and magnetic properties of Pr-Cu diffused magnet were simultaneously improved. (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic)(sic)(sic), (sic)(sic)(sic) Nd2Fe14B/Nd2Fe14B,Nd2Fe14B/(sic)Nd(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)Nd(sic)(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic)(sic)(sic)(sic)2:14:1(sic)(sic)(sic)Nd(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic)(sic)(sic)(sic)(sic)(sic)Tb(sic)(sic)(sic)Tb(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).2:14:1(sic)(sic)(sic)(sic)(sic)(sic)Tb(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic

关键词： Nd-Fe-B magnet Microstructure Mechanical behaviour Coercivity

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