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CSEE Journal of Power and Energy Systems 2025年第1期11卷 329-339页

作者： Mengmeng Cai Wenbo wang Xin Fang Anthony R.Florita Michael Ingram Dane Christensen National Renewable Energy Laboratory GoldenCO15013USA Department of Electrical and Computer Engineering Mississippi State UniversityUSA

Modern power systems become more vulnerable to cyber threats due to their growing interconnectivity, interdependence, and complexity. Widespread deployment of distributed energy resources (DERs) further expands the threat landscape to the grid edge, where fewer cybersecurity protections exist. In this article, a systematic cyber-physical events demonstration, enabled by an integrated transmission, distribution, and communication co-simulation framework, is performed. It analyzes cyber risks to power grid under DER-enabled automatic generation control from different angles. Unlike existing works, the simulation captures millisecond-to-minutes frequency and voltage transient dynamics at a cross-region system scale.

关键词： Cyber-physical events distributed energy resources T&D dynamic co-simulation

Influence of environmental factors on arsenic accumulation and biotransformation using the aquatic plant species Hydrilla verticillata

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Journal of Environmental Sciences 2020年第4期32卷 244-252页

作者： Yuan Zhao Zhuo Zhen Zhenhong wang Liqing Zeng Changzhou yan Key Laboratory of Urban Environment and Health Fujian Key Laboratory of Watershed EcologyInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China School of Chemistry and Environment Fujian Province Key Laboratory of Modern Analytical Science and Separation TechnologyMinnan Normal UniversityZhangzhou 363000China

Hydrilla verticillata(waterthyme)has been successfully used for phytoremediation in arsenic(As)contaminated *** evaluate the effects of environmental factors on phytoremediation,this study conducted a series of orthogonal design experiments to determine optimal conditions,including phosphorus(P),nitrogen(N),and arsenate(As(Ⅴ))concentrations and initial pH levels,for As accumulation and biotransformation using this aquatic plant species,while also analyzing As species transformation in culture media after 96-hr *** of variance and the signal-to-noise ratio were used to identify both the effects of these environmental factors and their optimal conditions for this *** indicated that both N and P significantly impacted accumulation,and N was essential in As species *** N and intermediate P levels were critical to As accumulation and biotransformation by ***,while high N and low P levels were beneficial to As species transformation in culture *** highest total arsenic accumulation was(197.2±17.4)μg/g dry weight when As(V)was at level 3(375μg/L),N at level 2(4 mg/L),P at level 1(0.02 mg/L),and pH at level 2(7).Although *** is highly efficient in removing As(Ⅴ)from aquatic environments,its use could be potentially harmful to both humans and the natural environment due to its release of highly toxic *** cost-effective and ecofriendly phytoremediation of As-contaminated water,both N and P are helpful in regulating As accumulation and transformation in plants.

关键词： Phytoremediation Orthogonal design pH Phosphorus Nitrogen

Dynamic response and damage evolution of Zr-based bulk metallic glass under shock loading

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Journal of Materials Science & Technology 2021年第34期93卷 119-127页

作者： yan Li Xingwang Cheng Zhaolong Ma Xuhai Li Meng wang National Key Laboratory of Science and Technology on Materials under Shock and Impact School of Material Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Science and Technology on Shock Waves and Detonation Physics Laboratory Institute of Fluid PhysicsChinese Academy of Engineering PhysicsMianyang 621900.China

Dynamic response and damage evolution of Zr_(70)Cu_(13)Ni_(9.8)Al_(3.6)Nb_(3.4)Y_(0.2) bulk metallic glass(Zr-based BMG)under impact pressure ranging from 4.03 GPa to 27.22 GPa were *** Hugoniot Elastic Limit(HEL)and the spalling Strength(σ_(sp))were measured as 7.09 GPa and 2.28 GPa,and the curve of impact velocity(D)and particle velocity(u)were also *** the strain rate of~10^(5)s^(-1),local crystallization phenomenon was *** increasing the impact pressure,the failure mode of Zr-based BMG changed from spallation to fragmentation caused by the combination of spalling cracks and longitudinal ***-cup structures were also observed in the internal spalling zone via nano-CT *** increasing the impact pressure,the thickness of Zr-based BMG increased after impact and the remelting and cladding layers were also observed on the fracture *** fragments of the specimen were welded after impact due to the high temperature remelting,which causes plastic deformation of Zr-based BMG under shock loading.

关键词： Zr-based bulk metallic glass Shock loading Dynamic response Damage evolution

Elucidating the effect of oxides on the zeolite catalyzed alkylation of benzene with 1-dodecene

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Chinese Journal of Chemical Engineering 2023年第4期56卷 126-135页

作者： Shiyong Xing yan Cui Tiefeng wang Jinwei He Minghan Han Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Petrochemical Research Institute PetroChina Company LimitedBeijing 100195China Henan Energy and Chemical Industry Group Company Limited Zhengzhou 450046China

In the present work, the effect of oxides on the alkylation of benzene with 1-dodecene was comprehensively investigated over MCM-49 n-heptanol, n-heptaldehyde and n-heptanoic acid were selected as the model oxides herein, and obvious decrease of lifetime could be caused by only trace amount of oxides added in the feedstocks. However, the deactivated catalysts were difficult to be regenerated by extraction with hot benzene. Additionally, coke-burning was also proved to be incapable to regenerate the deactivated catalysts mainly for the dealumination during calcination. Further characterizations complementary with DFT calculations were conducted to demonstrate that the deactivation was mainly due to the firm adsorption of oxides on the acid sites.

关键词： Zeolite 1-dodecene Alkylation Oxides Deactivation

Porous β-cyclodextrin nanotubular assemblies enable high-efficiency removal of bisphenol micropollutants from aquatic systems

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Nano Research 2020年第7期13卷 1933-1942页

作者： Wenya He Xiaoyan Ren Zhiqiang yan Jin wang Lehui Lu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China University of Chinese Academy of Sciences Beijing 100039China Department of Chemistry&Physics State University of New York at Stony BrookStony BrookNew York 11790USA

The performance of water purification by adsorption method has been limited owing to the fact that most of current available adsorbents fail to achieve satisfactory removal performance for organic ***,we report the design and synthesis of novel porous polymeric adsorbent built fromβ-cyclodextrin(B-CD),in whichβ-CD molecules are arranged in an ordered bis(β-CD)tubular *** induction of bis(B-CD)units renders them high adsorption affinity toweard bisphenols(bisphenol A and its analogues bisphenol B,bisphenol F and bisphenol S),the typical endocrine disruptors,via the formation of stable host-guest inclusion complexes in aquatic *** combination with their high porosity(Brunauer-Emmett-Teller(BET)surface area of 150 m2·g-1),abundantβ-CD content and fast sorption kinetics,the obtained adsorbent outperforms commercial water purifier in elimination of bisphenol micropollutants from potable *** work may open a new avenue for designing highly eficient adsorbents for removal of organic micropollutants from aquatic systems.

关键词： water remediation bisphenol micropollutant polymeric p-cyclodextrin(β-CD) binding affinity β-CD dimer

Vapor-and temperature-triggered reversible optical switching for multi-response Cu_(8)cluster supercrystals

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Chinese Chemical Letters 2024年第11期35卷 499-504页

作者： yan wang Si-Meng Zhai Peng Luo Xi-yan Dong Jia-Yin wang Zhen Han Shuang-Quan Zang Henan Key Laboratory of Crystalline Molecular Functional Materials and College of ChemistryZhengzhou UniversityZhengzhou 450001China Key Laboratory for Special Functional Materials of Ministry of Education Henan UniversityKaifeng 475004China College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China

Multi-response metal cluster supercrystal materials,which can simultaneously display various such as color,photoluminescence,changes by bearing only one stimulus,have huge potential as stimuliresponsive intelligent material,but are rarely ***,we report three Cu_(8)cluster supercrystals,Cu_(8)-1,Cu_(8)-2,and Cu_(8)-3,with homologous cluster molecule units[Cu_(8)(PNP)_(3)(EPPTA)_(6)](PF_(6))_(2)but distinct *** supercrystals display brightμs-long photoluminescence with a high quantum yield of up to 26.6%in solid-state at room temperature and aggregation-induced emission(AIE)*** thermal stability and blue-excitable bright yellow emission make Cu_(8)-3 serve as a yellow phosphor for white light-emitting ***,upon being stimulated by solvent vapor and temperature,reversible supercrystal-to-supercrystal transformations can be witnessed accompanied by remarkable color and luminescence *** work not only provides a kind of Cu cluster supercrystal model but also motivates the further development of metal clusters in multi-response materials.

关键词： Copper cluster Supercrystal Photoluminescence Stimuli-response Reversible switching

Fast synthesis of monodisperse TiO_2 submicrospheres via a modified sol-gel approach

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Rare Metals 2008年第1期27卷 1-4页

作者： wang hong＇en LI Bo yan Zaoxuea LU Zhouguang CHENG Ruijing QIAN Donga College of Chemistry and Chemical Engineering Central South University Changsha 410083 China Sinopec Changling Catalyst Division Yueyang 414012 China State Key Laborotory of Powder Metallurgy Central South University Changsho 410083China

Monodisperse titania glycolate submicrospheres were synthesized by a modified sol-gel route, in which ultrasonic treatment was introduced to improve the reaction efficiency. The as-prepared products were characterized by means of Fourier transform infrared spectrum （FT-IR）, transmission electron microscopy （TEM）, powder X-ray diffraction （XRD）, and scanning electron microscopy （SEM）. The results indicate that the as-prepared products are titania glycolate submicrospheres with diameters of 230-330 nm. The average particle diameter is estimated to be about 280 nm. Ultrasonic treatment has an important influence on the morphology of the produced titania glycolates. After calcination at 450°C for 2 h, these titania glycolates were completely converted into anatase TiO2. The morphology of TiO2 particles was well reserved during the calcination process except for a reduction of 18% in the average particle size.

关键词： TiO2 submicrosphere sol-gel monodisperse ultrasonic treatment

A topology and risk-aware access control framework for cyber-physical space

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Frontiers of Computer Science 2020年第4期14卷 181-195页

作者： yan CAO Zhiqiu HUANG Yaoshen YU Changbo KE Zihao wang School of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing211106China Key Laboratory of Safety-Critical Software Ministry of Industry and Information TechnologyNanjing211106China Collaborative Innovation Center of Novel Software Technology and Industrialization Nanjing211106China School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing210023China

Cyber-physical space is a spatial environment that integrates the cyber world and the physical world,aiming to provide an intelligent environment for users to conduct their day-to-day *** interplay between the cyber space and physical space proposes specific security requirements that are not captured by traditional access control *** one hand,the security of the physical space and the cyber space should be both concerned in the cyber-physical *** the other hand,the bad results caused by failure in providing secure policy enforcement may directly affect the controlled physical *** this paper,we propose an effective access control framework for the cyber-physical ***,a topology-aware access control(TAAC)model is *** can express the cyber access control,the physical access control,and the interaction access control ***,a risk assessment approach is proposed for the policy enforcement *** is used to evaluate the user behavior and ensures that the suspicious behaviors executed by authorized users can be handled ***,we propose a role activation algorithm to ensure that the objects are accessed only by legal and honest ***,we evaluate our approach by using an illustrative example and the performance *** results demonstrate the feasibility of our approach.

关键词： cyber-physical space access control risk management role activation

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基于改进YOLOv7的磁瓦表面缺陷识别

制造业自动化 2025年第1期47卷 103-111页

作者：王衍宁欧阳八生南华大学机械工程学院湖南衡阳421001

针对传统视觉检测磁瓦表面缺陷精度低的问题,提出一种改进的YOLOv7磁瓦表面缺陷识别方法。首先,结合图像处理技术对有限的缺陷图像数据进行数据增强处理,制作了磁瓦表面缺陷数据集;其次,采用WIoU替换原YOLOv7模型中的CIoU,提升对普通质... 详细信息

针对传统视觉检测磁瓦表面缺陷精度低的问题,提出一种改进的YOLOv7磁瓦表面缺陷识别方法。首先,结合图像处理技术对有限的缺陷图像数据进行数据增强处理,制作了磁瓦表面缺陷数据集;其次,采用WIoU替换原YOLOv7模型中的CIoU,提升对普通质量锚框的关注度,同时在模型主干部分添加全局注意力模块GAM,使得模型在多个维度上对图像重要特征进行捕捉,提高检测精度;然后,通过使用部分卷积PConv减少改进后的模型参数量和计算量;最后,通过实验对比分析,表明改进后的模型相较于原模型的平均精度提升了4%、召回率提升了10.4%,单张图像处理时间为52.6 ms;同时与目前几种主流的算法进行比较,发现改进后的YOLOv7模型效果更佳,对磁瓦表面缺陷检测具有较大的应用价值。

关键词： YOLOv7 缺陷识别磁瓦注意力机制

Extrusion-Based 3D-Printed Supercapacitors:Recent Progress and Challenges

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Energy & Environmental Materials 2022年第3期5卷 800-822页

作者： Xiao yan Yueyu Tong Xinzhong wang Feng Hou Ji Liang Research Centre for Information Technology Shenzhen Institute of Information TechnologyShenzhen 518172China Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNorth Wollongong NSW 2500Australia Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China

Supercapacitors have been regarded as promising power supplies for future electronics due to their high power density,superior stability,easy integration,and ***-based three-dimensional printing technologies hold promise to satisfy the demands for integrated and flexible supercapacitors because of their highly versatile manufacturing *** this review article,a comprehensive and timely review of these state-of-theart technologies is *** start with a brief introduction of fundamental concepts of supercapacitors,including energy storage mechanisms and device ***,the latest progress of extrusionbased three-dimensional printing technologies(e.g.,fused deposition modeling,inkjet printing,and direct ink writing)along with their applications for manufacturing supercapacitors is *** choice of printable materials(e.g.,graphene,carbon nanotubes,metal oxides,and MXenes),printing process,and the resulted electrochemical performances of supercapacitors are especially ***,the development of extrusion-based three-dimensional printing supercapacitors is summarized,with existing challenges diagnosed,possible solutions proposed,and future outlooks *** hope this review can offer insights to further improve the performance of three-dimensional-printed supercapacitors for practical applications.

关键词： 3D printing direct ink writing fused deposition modeling inkjet printing supercapacitors