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Guest Editorial:Special Section on Battery Energy Storage Systems for Net-zero Power Systems and Markets

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 321-322页

作者： Pierluigi Mancarella nikos Hatziargyriou Chongqing Kang The University of Melbourne MelbourneAustralia The University of Manchester ManchesterUK National Technical University of Athens(NTUA) AthensGreece Tsinghua University BeijingChina IEEE

Battery energy storage technologies have witnessed both dramatic cost reduction and technical evolution in recent *** is leading to widespread deployment of battery energy storage systems(BESSs)worldwide,particularly to support operation of power grids with already deep penetration of *** the development of new battery technologies with different power-to-energy ratios and for various engineering applications,BESSs could play a strategic role towards a net-zero energy *** opportunities are emerging for BESSs to participate in several markets,provide different grid services,and perform“value stacking”,eventually allowing development of new business cases and improved BESS *** configurations that are“behind the meter”,“in front of the meter”,hybrid plants co-located with renewables,and so forth,are only some of the exciting propositions that are being seen in different countries and at different scales,from highly distributed(virtual power plants),to neighbourhood-level(community batteries),to utility scale.

关键词： Battery battery eventually

Collateral Monetary Policy,Regional Financial Development,and Nonfinancial Firms'Shadow Banking Activities

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China & World Economy 2024年第5期32卷 166-196页

作者： Chao Yuan Hai Jiang Jiawen Ren nikos Kapitsinis School of Finance Guangdong University of Finance and EconomicsChina Department of Finance School of EconomicsJinan UniversityChina University of Copenhagen Denmark

The disparity in credit access between large firms and small and medium-sized enterprises contributes to the prevalence of shadow banking activities,where large,nonfinancial firms with high credit ratings have become new financial *** activities vary geographically and are afected significantly by collateral monetary *** paper examines the effect of collateral monetary policy,its reform,and regional financial development characteristics on large firms'shadow banking activities,with a focus on the medium-term lending facility(MLF),the primary collateral monetary policy instrument in *** results indicate that the MLF encouraged large firms'shadow banking ***,the MLF reform in 2018 mitigated this effect by broadening the range of acceptable *** financial development,such as a higher number of bank branches around firms,facilitated large firms'shadow banking activities and amplified the MLF's stimulating *** contrast,regional advancements in digital finance and market development limited both shadow banking activities and MLF's impact.

关键词： collateral monetary policy financial geography medium-term lending facilities shadow banking

Secure smart contract-based digital twins for the Internet of Things

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BLOCKCHAIN-RESEARCH AND APPLICATIONS 2024年第1期5卷 39-49页

作者： Pittaras, Iakovos Fotiou, nikos Karapapas, Christos Siris, Vasilios A. Polyzos, George C. Athens Univ Econ & Business Sch Informat Sci & Technol Dept Informat Mobile Multimedia Lab Athens 10434 Greece Chinese Univ Hong Kong Sch Data Sci Shenzhen 518172 Peoples R China

The proliferation of Internet of Things (IoT) devices that operate unattended providing a multitude of important and often sensitive services highlights the need for seamless interoperability and increased security. We argue that digital twins of IoT devices, with the right design, can enhance the security, reliability, auditability, and interoperability of IoT systems. The salient features of digital twins have made them key elements for the IoT and Industry 4.0. In this paper, we leverage advances in W3C's Web of Things (WoT) standards and distributed ledger technologies (DLTs) to present a novel design of the smart contract-based digital twins with enhanced security, transparency, interoperability, and reliability. We provide two different variations of that general design using two different blockchains (one public and one private, permissioned blockchain), and we present design tradeoffs. Furthermore, we introduce an architecture for accessing and controlling IoT devices securely and reliably, providing full auditability, while at the same time using the proposed digital twins as an indirection mechanism (proxy). The proposed architecture leverages the blockchain to offer notable properties, namely,decentralization, immutability, auditability, non-repudiation, availability, and reliability. Moreover, it introduces mass actuation, easier management of IoT devices, and enhanced security to the IoT gateways, enables new business models, and makes consumer devices (vendor-)agnostic.

关键词： Digital twins Internet of Things Web of Things Distributed ledger technologies Hyperledger Fabric Ethereum

Evacuating Populations with Special Needs Using Analytical Hierarchy Process (AHP) Method and GIS

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Journal of Geographic Information System 2024年第4期16卷 276-288页

作者： nikos Polakis Nikolas Koupatou Androniki Tsouchlaraki School of Chemical and Environmental Engineering Technical University of Crete Chania Greece

The present study is focused on the development of a methodology pertaining to the evacuation plans improvement in a scenario where infrastructures are located in residential settlements that might be threatened by fires;the aforesaid settlements are oftentimes found to be resided by vulnerable population groups, namely elderly people, handicapped people and children. The study pinpoints Evacuation Assembly Points (E.A.P.s) on the outskirts of their settlement and examines the evacuation routes accessibility and safety by way of utilizing Geographic Information Systems (GISs). What is more, our meticulously planned methodology combining quantitative analysis, as well as participatory planning, allows for improve strategies targeted on how to effectively ensure the vulnerable population groups evacuation. The study’s results exhibit how vital it is to integrate technological tools in combination with each community’s partaking in the process of preparing and implementing evacuation plans. The study’s findings furthermore suggest the need to further research the evolution of dynamic evacuation models, which would take the ever-changing and ever-evolving needs of vulnerable population groups into account.

关键词： GIS Evacuation Control Strategies Disaster Response Fire Safety

面向多场景辅助服务的大规模电动汽车聚合可调度容量建模

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电力系统自动化 2024年第7期48卷 103-115页

作者：王杨洋茆美琴杨铖周堃杜燕 nikos D.HATZIARGYRIOU 教育部光伏系统工程研究中心合肥工业大学安徽省合肥市230009 国网安徽省电力有限公司安徽省合肥市230000 国网安徽省电动汽车服务有限公司安徽省合肥市230000 雅典国立理工大学希腊雅典15780

大规模电动汽车聚合可调度容量是含电动汽车的虚拟电厂参与多层级多场景电力平衡辅助服务的重要技术指标之一。然而,现有电动汽车聚合可调度容量模型难以适应大规模电动汽车与省级电力调度中心互动场景。为此,文中从面向电力系统调峰、... 详细信息

大规模电动汽车聚合可调度容量是含电动汽车的虚拟电厂参与多层级多场景电力平衡辅助服务的重要技术指标之一。然而,现有电动汽车聚合可调度容量模型难以适应大规模电动汽车与省级电力调度中心互动场景。为此,文中从面向电力系统调峰、调频和调压多级多场景调控新视角,提出了数据驱动和机器学习相结合的双层聚类电动汽车聚合可调度容量建模方法。该方法通过构建电动汽车-充电桩广义储能单元的个体可调度容量模型,结合基于密度空间的聚类算法和改进的自组织映射深度聚类算法,有效地融合了电动汽车电量的时间分布和充电桩的空间分布特性,构建了面向调峰、调频和调压多场景调控的聚合可调度容量模型。采用了某省实际充电记录数据对提出的方法进行了验证,获得了“早间型”“中午型”“晚间型”等多种充电画像类型,实现了时空分布各异的电动汽车广义储能系统的自主聚合和省市级规模电动汽车参与电网不同辅助服务潜能的评估,并为聚合可调度容量的预测奠定了数据基础。

关键词：电动汽车辅助服务数据驱动广义储能系统电动汽车与电网互动可调度容量聚合模型双层聚类

Twenty years of population dynamics in European beech-oak forest at their rear range margin anticipate changes in its structure and composition

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Forest Ecosystems 2024年第3期11卷 358-370页

作者： álvaro Rubio-Cuadrado Iciar Alberdi Isabel Canellas Fernando Montes Jesús Rodríguez-Calcerrada Rosana López Guillermo G.Gordaliza María Valbuena-Carabana nikos Nanos Ramón Perea Luis Gil Departamento de dinamica y gestion forestal Instituto de Ciencias Forestales(ICIFOR-INIA)CSICCtra.La Coruna km 7.528040MadridSpain Departamento de Sistemas y Recursos Naturales Escuela Tecnica Superior de Ingeniería de MontesForestal y del Medio NaturalUniversidad Politecnica de Madrid.Ciudad Universitaria s/n28040MadridSpain School of Forestry and Natural Environment Aristotle University of ThessalonikiUniversity Campus54124ThessalonikiGreece

There is an increasing interest in restoring degraded forests,which occupy half of the forest *** the forms of restoration,passive restoration,which involves the elimination of degrading factors and the free evolution of natural dynamics by applying minimal or no management,is gaining *** dynamics is difficult to predict due to the influence of multiple interacting factors such as climatic and edaphic conditions,composition and abundance of species,and the successional character of these ***,we study the natural dynamics of a mixed forest located in central Spain,which maintained an open forest structure,due to intensive use,until grazing and cutting were banned in the *** most frequent woody species in this forest are Fagus sylvatica,Quercus petraea,Quercus pyrenaica,Ilex aquifolium,Sorbus aucuparia,Sorbus aria and Prunus avium,with contrasting shade and drought *** species are common in temperate European deciduous forest and are found here near their southern distribution limit,except for *** order to analyze forest dynamics and composition,three inventories were carried out in 1994,2005 and *** results show that,despite the Mediterranean influence,the natural dynamics of this forest has been mainly determined by different levels of shade *** the abandonment of grazing and cutting,*** expanded rapidly due to its lower shade tolerance,whereas after canopy closure and forest densification,shade-tolerant species gained ground,particularly ***,despite its lower drought and late-frost *** the current dynamics continue,*** will overtake the rest of the species,which will be relegated to sites with shallow soils and steep ***,all the multi-centennial beech trees,which are undergoing a rapid mortality and decline process,will disappear.

关键词： Forest succession Secondary forest Woodland Mixed forest Competition Recruitment

Probabilistic fragility analysis:A tool for assessing design rules of RC buildings

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Earthquake Engineering and Engineering Vibration 2008年第1期7卷 45-56页

作者： nikos D Lagaros Institute of Structural Analysis&Seismic Research National Technical University of AthensGreece Lecturer

In this work, fragility analysis is performed to assess two groups of reinforced concrete structures. The first group of structures is composed of buildings that implement three common design practices; namely, fully infilled, weak ground story and short columns. The three design practices are applied during the design process of a reinforced concrete building. The structures of the second group vary according to the value of the behavioral factors used to define the seismic forces as specified in design procedures. Most seismic design codes belong to the class of prescriptive procedures where if certain constraints are fulfilled, the structure is considered safe. Prescriptive design procedures express the ability of the structure to absorb energy through inelastic deformation using the behavior factor. The basic objective of this work is to assess both groups of structures with reference to the limit-state probability of exceedance. Thus, four limit state fragility curves are developed on the basis of nonlinear static analysis for both groups of structures. Moreover, the 95% confidence intervals of the fragility curves are also calculated, taking into account two types of random variables that influence structural capacity and seismic demand.

关键词： probabilistic fragility analysis design practice behavior factor Monte Carlo simulation method

Circulating microRNA expression and nonalcoholic fatty liver disease in adolescents with severe obesity

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World Journal of Gastroenterology 2024年第4期30卷 332-345页

作者： Yi-Jie Li Brittney O Baumert nikos Stratakis Jesse A Goodrich Hao-Tian Wu Jing-Xuan He Yin-Qi Zhao Max T Aung Hong-Xu Wang Sandrah P Eckel Douglas I Walker Damaskini Valvi Michele A La Merrill Justin R Ryder Thomas H Inge Todd Jenkins Stephanie Sisley Rohit Kohli Stavra A Xanthakos Andrea A Baccarelli Rob McConnell David V Conti Lida Chatzi Department of Population and Public Health Sciences Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCA 90032United States Barcelona Institute of Global Health Barcelona Institute of Global HealthBarcelona 08036Spain Department of Environmental Health Sciences Mailman School of Public HealthColumbia UniversityNew YorkNY 10032United States Gangarosa Department of Environmental Health Rollins School of Public HealthEmory UniversityAtlantaGA 30329United States Department of Environmental Medicine and Public Health Icahn School of Medicine at Mount SinaiNew YorkNY 10029United States Department of Environmental Toxicology University of CaliforniaDavisCA 95616United States Department of Surgery Lurie Children’s Hospital of ChicagoChicagoIL 60611United States Northwestern University Feinberg School of Medicine Northwestern UniversityChicagoIL 60611United States Division of Biostatistics and Epidemiology Cincinnati Children's Hospital Medical CenterCincinnatiOH 45229United States Department of Pediatrics University of Cincinnati College of MedicineCincinnatiOH 45229United States Department of Pediatrics Children’s Nutrition Research Center USDA/ARSBaylor College of MedicineHoustonTX 77030United States Department of Gastroenterology Children’s Hospital Los AngelesLos AngelesCA 90027United States Division of Gastroenterology Hepatology and NutritionCincinnati Children's Hospital Medical CenterCincinnatiOH 45229United States

BACKGROUND Nonalcoholic fatty liver disease(NAFLD)is one of the most common chronic liver diseases in children and *** ranges in severity from isolated hepatic steatosis to nonalcoholic steatohepatitis(NASH),wherein hepatocellular inflammation and/or fibrosis coexist with *** microRNA(miRNA)levels have been suggested to be altered in NAFLD,but the extent to which miRNA are related to NAFLD features remains *** analysis tested the hypothesis that plasma miRNAs are significantly associated with histological features of NAFLD in *** To investigate the relationship between plasma miRNA expression and NAFLD features among adolescents with *** This study included 81 adolescents diagnosed with NAFLD and 54 adolescents without NAFLD from the Teen-Longitudinal Assessment of Bariatric Surgery ***-operative core liver biopsies were collected from participants and used to characterize histological features of *** samples were collected during surgery for miRNA profiling.A total of 843 plasma miRNAs were profiled using the HTG EdgeSeq *** examined associations of plasma miRNAs and NAFLD features using logistic regression after adjusting for age,sex,race,and other key *** Pathways Analysis was used to identify biological functions of miRNAs that were associated with multiple histological features of *** We identified 16 upregulated plasma miRNAs,including miR-193a-5p and miR-193b-5p,and 22 downregulated plasma miRNAs,including miR-1282 and miR-6734-5p,in adolescents with ***,52,16,15,and 9 plasma miRNAs were associated with NASH,fibrosis,ballooning degeneration,and lobular inflammation,***,16 miRNAs were associated with two or more histological features of *** those miRNAs,miR-411-5p was downregulated in NASH,ballooning,and fibrosis,while miR-122-5p,miR-1343-5p,miR-193a-5p,miR-193b-5p,and miR-7845-5p were consistently and posi

关键词： MicroRNA Nonalcoholic fatty liver disease Non-alcoholic steatohepatitis Liver fibrosis Lobular inflammation Ballooning degeneration

pH-responsive AIE-active Polyethylene-based Block Copolymers

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Chinese Journal of Polymer Science 2019年第9期37卷 930-935页

作者： Yu Jiang nikos Hadjichristidis Physical Sciences and Engineering Division KAUST Catalysis Center Polymer Synthesis Laboratory King Abdullah University of Science and Technology (KAUST)

A novel synthetic strategy towards pH-responsive aggregation-induced emission (AIE)-active tetraphenylethene (TPE)- functionalized polyethylene-based block copolymers is presented. Tris(3-(4-(l,2,2-triphenylvinyl)phenoxy)propyl)borane was used to initiate the polyhomologation of dimethylsulfoxonium methylide to afford well-defined a-TPE-ω-OH linear polyethylenes (PE). The terminal hydroxyl groups were transformed to atom transfer radical polymerization (ATRP) initiating sites by esterification with bromoisobutyryl bromide, followed by polymerization of rert-butyl acrylate (tBA) to provide TPE-PE-b-PtBA block copolymers. After hydrolysis of the rBu group to COOH group, the corresponding pH-responsive TPE-PE-b-PAA block copolymers were obtained. All synthesized block copolymers revealed AIE behavior either in solution or bulk. Due to the pH-responsivity of PAA chains, the aggregation state at different pH and consequently the fluorescence intensity changed. Also, the synthesized block copolymers exhibited ion-specificity fluorescence properties.

关键词： Polyhomologation ATRP Polyethylene-b-poly(acrylic acid) AIE pH-responsivity Ion-specificity