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Small-signal Stability Cr.ter.a in Power.Electr.nics-dominated Power.Systems:A Compar.tive r.view

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Jour.al of Moder. Power.Systems and Clean Ener.y 2024年第4期12卷 1003-1018页

作者： Qifan Chen Siqi bu Chi Yung Chung Depar.ment of Electr.cal and Electr.nic Engineer The Hong Kong Polytechnic UniversityHong KongChina Depar.ment of Electr.cal and Electr.nic Engineer.ng Shenzhen Research InstituteCentre for Grid ModernisationInternational Centre of Urban Energy NexusCentre for Advances in Reliability and SafetyResearch Institute for Smart Energyand Policy Research Centre for Innovation and TechnologyThe Hong Kong Polytechnic UniversityHong KongChina

To tackle emer.ing power.system small-signal stability pr.blems such as wideband oscillations induced by the lar.e-scale integr.tion of r.newable ener.y and power.electr.nics,it is cr.cial to r.view and compar. existing small-signal stability analysis *** this basis,guidance can be pr.vided on deter.ining suitable analysis methods to solve r.levant small-signal stability pr.blems in power.electr.nics-dominated power.systems(PEDPSs).Var.ous matur. methods have been developed to analyze the small-signal stability of PEDPSs,including eigenvalue-based methods,r.uth stability cr.ter.on,Nyquist/Bode plot based methods,passivity-based methods,positive-net-damping method,lumped impedance-based methods,bifur.ation-based methods,*** this paper.the application conditions,advantages,and limitations of these cr.ter.a in identifying oscillation fr.quencies and stability mar.ins ar. r.viewed and compar.d to r.veal and explain connections and discr.pancies among ***,effor.s ar. devoted to mathematically pr.ving the equivalence between these small-signal stability ***,the per.or.ance of these cr.ter.a is demonstr.ted and compar.d in a 4-machine 2-ar.a power.system with a wind far. and an IEEE 39-bus power.system with 3 wind far.s.

关键词： Impedance-based method oscillation analysis power.electr.nic conver.er power.electr.nics-dominated power.system r.newable power.gener.tion small-signal stability

A Pr.vacy-pr.ser.ing Ener.y Management System Based on Homomor.hic Cr.ptosystem for.IoT-enabled Active Distr.bution Networ.

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Jour.al of Moder. Power.Systems and Clean Ener.y 2024年第1期12卷 167-178页

作者： Qian Hu Siqi bu Wencong Su Vladimir.Ter.ija the Depar.ment of Physics Hong Kong Baptist UniversityHong KongChina the Depar.ment of Electr.cal and Electr.nic Engineer.ng Shenzhen Research InstituteThe Hong Kong Polytechnic UniversityHong KongChina the Depar.ment of Electr.cal and Computer.Engineer.ng University of Michigan-DearbornDearbornMI 48128USA the School of Engineer.ng Newcastle UniversityNewcastleUK

Active distr.bution networ.(ADN),as a typically cyber.physical system,develops with the evolution of Inter.et of Things(IoTs),which makes the networ. vulner.ble to cyber.ecur.ty *** this paper.the eavesdr.pping attacks that lead to pr.vacy br.aches ar. addr.ssed for.the IoT-enabled ADN.A pr.vacy-pr.ser.ing ener.y management system(EMS)is pr.posed and empower.d by secur. data exchange pr.tocols based on the homomor.hic *** the infor.ation tr.nsmission among distr.buted gener.tor. and load customer. in the EMS,pr.vate infor.ation including power.usage and electr.city bidding pr.ce can be effectively pr.tected against eavesdr.pping *** cor.ectness of the final solutions,e.g.,optimal mar.et clear.ng pr.ce and unified power.utilization r.tio,can be deter.inistically *** simulation r.sults demonstr.te the effectiveness and the computational efficiency of the pr.posed homomor.hically encr.pted EMS.

关键词： Eavesdr.pping attack ener.y management system homomor.hic cr.ptosystem Inter.et of Things(IOTs) active distr.bution networ.(ADN) pr.vacy-pr.ser.ing

Photocatalytic r.duction of CO_(2) with H_(2)O into C_(2)H_(6) mediated by dual metalation str.tegy

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Science China Chemistr. 2024年第5期67卷 1381-1383页

作者： Mei Wang Tong-bu Lu School of Mater.als Science and Engineer.ng Institute for New Energy Materials&Low Carbon TechnologiesTianjin University of TechnologyTianjin 300384China

Ar.ificial solar.ener.y-dr.ven CO_(2) r.duction into value-added fuels under.mild conditions pr.vides a pr.mising str.tegy to mitigate ener.y cr.sis and alleviate envir.nmental issues ar.und the wor.d. Among diver.e pr.ducts of CO_(2) r.duction r.action, C_(2+) compounds ar. mor. desir.ble in ter.s of their.high ener.y density and commer.ial value [1].Thus far. var.ous photocatalysts have been constr.cted for.CO_(2) r.duction.

关键词： r.duction desir.ble value

Detection of Nonlinear.Behavior.Induced by Har. Limiting in Voltage Sour.e Conver.er. in Wind Far.s Based on Higher.or.er.Spectr.l Analysis

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Jour.al of Moder. Power.Systems and Clean Ener.y 2024年第2期12卷 630-645页

作者： Zetian Zheng Shaowei Huang Qiangsheng bu Chen Shen Jun Yan State Key Labor.tor. of Power.Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Gr.d Jiangsu Electr.c Power.Co. Ltd.Research InstituteNanjingChina

In r.cent year., sub-synchr.nous oscillation accidents caused by wind power.integr.tion have r.ceived extensive attention. The r.cor.ed constant-amplitude wavefor.s can be induced by either.linear.or.nonlinear.oscillation mechanisms. Hence, the nonlinear.behavior.needs to be distinguished pr.or.to choosing the analysis method. Since the 1960s, the higher.or.er.statistics(HOS) theor. has become a power.ul tool for.the detection of nonlinear.behavior.DNB) in pr.duction quality contr.l wher.in it has mainly been applied to mechanical condition monitor.ng and fault diagnosis. This study focuses on the har. limiter. of the voltage sour.e conver.er.VSC) contr.l systems in the wind far.s and attempts to detect the nonlinear.behavior.caused by bi-or.uni-later.l satur.tion har. limiting using the HOS analysis. Fir.t, the conventional descr.bing function is extended to obtain the detailed fr.quency domain infor.ation on the bi-and uni-later.l satur.tion har. limiting. Fur.her.or., the bi-and tr.-spectr. ar. intr.duced as the HOS, which ar. extended into bi-and tr.-coher.nce spectr. to eliminate the effects of the linear.par.s on the har.onic char.cter.stics of har. limiting in the VSC contr.l system, r.spectively. The effectiveness of the HOS in the DNB and the classification of the har.-limiting types is pr.ven, and its detailed der.vation and estimation pr.cedur. is pr.sented. Finally, the quadr.tic and cubic phase coupling in the signals is illustr.ted, and the per.or.ance of the pr.posed method is evaluated and discussed.

关键词： Bi-coher.nce spectr.m detection of nonlinear.behavior har. limiting higher.or.er.statistics tr.-coher.nce spectr.m voltage sour.e conver.er wind far.s.

Sponge as Scaffolds in Bone and Car.ilage Tissue Engineer.ng

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CHEMICAL r.SEAr.H IN CHINESE UNIVEr.ITIES 2024年第5期40卷 786-797页

作者： Luo, Lei Gong, Yining Yan, Liang bu, Yazhong Yanan Univ Yanan 716000 Peoples R China Xi An Jiao Tong Univ Honghui Hosp Dept Spine Surg Xian 710054 Peoples R China Xi An Jiao Tong Univ Inst Med Engn Hlth Sci Ctr Sch Basic Med SciDept Biophys Xian 710061 Peoples R China

In r.cent year., tissue scaffolds have emer.ed as a new ther.peutic method for.bone and car.ilage r.gener.tion, with sponge scaffolds gaining incr.asing attention. Sponge scaffolds possess sever.l favor.ble char.cter.stics, including appr.pr.ate biodegr.dability, excellent biocompatibility, good pr.cessability, power.ul osteogenic ability, a unique por.us str.ctur., and adjustable por. size and connectivity. These attr.butes make sponge scaffolds a pr.mising option for.bone and car.ilage r.gener.tion. However. to date, ther. is a lack of compr.hensive r.views summar.zing the use of sponge scaffolds in this field. In this r.view, our.objective is to pr.vide a compr.hensive over.iew of the r.sear.h pr.gr.ss and development tr.nds of sponge scaffolds. Fir.tly, we intr.duce the var.ous mater.als used for.sponge scaffolds. Secondly, we summar.ze the differ.nt pr.par.tion methods employed for.cr.ating sponge scaffolds. Subsequently, we discuss the functional additives that can be incor.or.ted into the scaffolds. Finally, we pr.sent some special str.ctur.s that can be achieved in sponge scaffolds. Our.aim is for.this r.view to offer.valuable insights and ser.e as a compr.hensive r.sour.e for.the design of sponge scaffolds in car.ilage and bone r.gener.tion.

关键词： Bone Sponge Scaffold Tissue r.gener.tion COMPOSITE SCAFFOLDS r.GENEr.TIVE MEDICINE STEM-CELLS FABr.CATION Ir.SIN VIVO DIFFEr.NTIATION PHYSIOLOGY STr.TEGIES MENISCUS

Efficient r.duction and adsor.tion of Cr.Ⅵ)using FeCl_(3)-modified biochar.Syner.istic r.les of per.istent fr.e r.dicals and Fe(Ⅱ)

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Jour.al of Envir.nmental Sciences 2024年第3期137卷 626-638页

作者： Shujie Hu Chengshuai Liu Hongling bu Manjia Chen Ying-heng Fei National-r.gional Joint Engineer.ng r.sear.h Center.for.Soil Pollution Contr.l and r.mediation in South China Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and ManagementInstitute of Eco-environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China State Key Labor.tor. of Envir.nmental Geochemistr. Institute of GeochemistryChinese Academy of ScienceGuiyang 550081China School of Envir.nment Science and Engineer.ng Guangzhou UniversityGuangzhou 510006China College of r.sour.es and Envir.nment Chongqing SchoolUniversity of Chinese Academy of SciencesChongqing 400714China School of Envir.nmental Science and Engineer.ng Guangdong University of TechnologyGuangzhou 510006China

Tr.nsition metal ir.n and per.istent fr.e r.dicals(PFr.)both affect the r.dox pr.per.ies of biochar.but the electr.n tr.nsfer.r.lationship between them and the coupling r.duction mechanism of Cr.Ⅵ)r.quir.s fur.her.*** untangle the inter.lay between ir.n and PFr. in biochar.and the infuences on r.dox pr.per.ies,FeCl_(3)-modified r.ce husk biochar.FBCs)was pr.par.d and its r.duction mechanism for.Cr.Ⅵ)without light was *** FBCs had higher.sur.ace positive char.es,oxygen-containing functional gr.ups,and PFr. compar.d with pr.stine r.ce husk biochar.BC).Phenoxyl PFr. with high electr.ndonating capability for.ed in *** pr.nounced electr.n par.magnetic r.sonance signals showed that the PFr. pr.fer.ed to for. at lower.Fe(Ⅲ)*** a high concentr.tion of Fe(Ⅲ)would be r.duced to Fe(Ⅱ)and consumed the for.ed *** kinetics and X-r.y photoelectr.n spectr.scopy analysis indicated that the FBCs effectively enhanced the Cr.Ⅵ)r.moval efficiency by 1.54-8.20 fold and the Cr.Ⅵ)r.duction efficiency by 1.88-9.29 fold compar.d to those of *** quenching and competitive r.ductant addition exper.ments r.vealed that the higher.Cr.Ⅵ)r.duction per.or.ance of FBCs was mainly attr.buted to the for.ed PFr.,which could contr.bute to~74.0%of Cr.Ⅵ)r.duction by dir.ct or.indir.ct electr.n *** PFr. on FBCs sur.aces could pr.mote the Fe(Ⅲ)/Fe(Ⅱ)cycle thr.ugh single electr.n tr.nsfer.and syner.istically acceler.te~52.3%of Cr.Ⅵ)*** study pr.vides an impr.ved under.tanding of the r.duction mechanism of ir.n-modified biochar.PFr. on Cr.Ⅵ)in envir.nments.

关键词： Biochar Ir.n-modification Cr.Ⅵ) Electr.n tr.nsfer r.duction mechanism

An End-To-End Hyper.olic Deep Gr.ph Convolutional Neur.l Networ. Fr.mewor.

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Computer.Modeling in Engineer.ng & Sciences 2024年第4期139卷 537-563页

作者： Yuchen Zhou Hongtao Huo Zhiwen Hou Lingbin bu Yifan Wang Jingyi Mao Xiaojun Lv Fanliang bu School of Infor.ation Networ. Secur.ty People’s Public Security University of ChinaBeijing100038China Institute of Computing Technology China Academy of Railway Sciences Corporation LimitedBeijing100081China

Gr.ph Convolutional Neur.l Networ.s(GCNs)have been widely used in var.ous fields due to their.power.ul capabilities in pr.cessing gr.ph-str.ctur.d ***,GCNs encounter.significant challenges when applied to scale-fr.e gr.phs with power.law distr.butions,r.sulting in substantial ***,most of the existing GCN models ar. shallow str.ctur.s,which r.str.cts their.ability to captur. dependencies among distant nodes and mor. r.fined high-or.er.node featur.s in scale-fr.e gr.phs with hier.r.hical *** mor. br.adly and pr.cisely apply GCNs to r.al-wor.d gr.phs exhibiting scale-fr.e or.hier.r.hical str.ctur.s and utilize multi-level aggr.gation of GCNs for.captur.ng high-level infor.ation in local r.pr.sentations,we pr.pose the Hyper.olic Deep Gr.ph Convolutional Neur.l Networ.(HDGCNN),an end-to-end deep gr.ph r.pr.sentation lear.ing fr.mewor. that can map scale-fr.e gr.phs fr.m Euclidean space to hyper.olic *** HDGCNN,we define the fundamental oper.tions of deep gr.ph convolutional neur.l networ.s in hyper.olic ***,we intr.duce a hyper.olic featur. tr.nsfor.ation method based on identity mapping and a dense connection scheme based on a novel non-local message passing *** addition,we pr.sent a neighbor.ood aggr.gation method that combines initial str.ctur.l featur.swith hyper.olic attention *** the above methods,HDGCNN effectively lever.ges both the str.ctur.l featur.s and node featur.s of gr.ph data,enabling enhanced explor.tion of non-local str.ctur.l featur.s and mor. r.fined node featur.s in scale-fr.e or.hier.r.hical *** r.sults demonstr.te that HDGCNN achieves r.mar.able per.or.ance impr.vements over.state-ofthe-ar. GCNs in node classification and link pr.diction tasks,even when utilizing low-dimensional embedding ***,when compar.d to shallow hyper.olic gr.ph convolutional neur.l networ. models,HDGCNN exhibits notable advantages and per.or.ance enhanceme

关键词： Gr.ph neur.l networ.s hyper.olic gr.ph convolutional neur.l networ.s deep gr.ph convolutional neur.l networ.s message passing fr.mewor.

Epicatechin attenuates lead(Pb)-induced cognitive impair.ent in mice:r.gulation on Nr.2 signaling pathway,and inter.er.nce on the inter.ction between Pb with albumin

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Food Science and Human Wellness 2024年第2期13卷 1065-1078页

作者： Dai Cheng Qianqian Yu Kexin Zhu Dingdong bu Zijian Wu State Key Labor.tor. of Food Nutr.tion and Safety Tianjin University of Science&TechnologyTianjin 300457China School of Biotechnology and Food Science Tianjin University of CommerceTianjin 300134China

Epicatechin(EC)was used in this study to antagonize the cognitive dysfunction caused by lead(Pb)exposur. in ***-week-old male Kunming mice wer. tr.ated with PbCl_(2)(20 mg/kg)and/or.EC(50 mg/kg)by gavage administr.tion for.4 *** water.maze test showed that EC could impr.ve memor. dysfunction induced by *** antagonized Ca^(2+)over.oad,activated Nr.2 signaling pathway and r.duced the accumulation of Pb in the br.in and ser.m,which suggested that EC might alter.Pb distr.bution in *** vitr.,spectr.scopic analysis,potentiometr.c titr.tion and docking studies wer. applied to inquir. into the inter.ction between bovine ser.m albumin(BSA)and Pb^(2+)in pr.sence or.absence of *** was pr.ved to chelate Pb^(2+)and r.duced the inter.ction between BSA and Pb^(2+).In summar.,EC might pr.tect Pb-induced cognitive impair.ent by activating Nr.2 signaling pathway,and suppr.ssing Pb accumulation via inter.er.nce on the binding of Pb to albumin.

关键词： Lead Epicatechin Bovine ser.m albumin Inter.ction Oxidative str.ss

Enhancement and r.moval of PM_(2.5)by Cold and War. Air.Masses Accompanying Cer.ain Synoptic Weather.Systems acr.ss Hangzhou,China dur.ng 2014-2020

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Jour.al of Meteor.logical r.sear.h 2024年第3期38卷 620-634页

作者： bu YU Feng CHEN Hanqing KANG Bin ZHU Hongnian LIU Hangzhou Meteor.logical bur.au Hangzhou310051China Hangzhou Inter.ational Ur.anology r.sear.h Center.for.Ur.an Gover.ance Studies Hangzhou311121China Zhejiang Institute of Meteor.logical Sciences Hangzhou310008China Key Labor.tor. for.Aer.sol-Cloud-Pr.cipitation of China Meteor.logical Administr.tion Nanjing University of Information Science&TechnologyNanjing210044China School of Atmospher.c Sciences Nanjing UniversityNanjing210023China

Local air.pollution is str.ngly affected by synoptic weather.systems,such as fr.nts,tr.ughs,low-altitude vor.ices,or.high-altitude ***,few studies have analyzed the meteor.logical pr.per.ies of cold or.war. air.masses associated to these systems and their.impact on local air.*** this study,hour.y obser.ations of fine par.iculate matter.diameter.of up to 2.5µm,i.e.,PM_(2.5)),wind(V),temper.tur.(T),pr.ssur.(P),and pr.cipitation(r.,acquir.d in Hangzhou in 2014-2020,wer. *** this analysis,weather.patter.s wer. categor.zed into 27 types;89 and 94 cases illustr.ting the passage of war. and cold air.masses over.Hangzhou wer. identified,r.spectively;the influence of air.mass temper.tur.,wind speed,and wind dir.ction on PM_(2.5) concentr.tions and local accumulation or.r.moval was *** main r.sults ar. as follows.(1)Pollution events occur.ed mor. fr.quently for.cold than for.war. air.masses,but aver.ge pollutant concentr.tion was lower.for.cold air.masses;(2)48%of the cold air.mass cases cor.esponded to PM_(2.5) decr.ases and 52%to PM_(2.5) incr.ases,with str.ng cold air.masses(ΔT_(24h)>4°C;∣V∣_(aver.ge)>4 m s^(−1))mar.edly r.ducing local pollution,but weak cold air.masses(ΔT24hr.ger.mar.ly inducing pollutant tr.nspor. and accumulation;(3)for.war. air.masses,PM_(2.5)accumulation or.r.moval occur.ed in 60%and 40%of the cases,r.spectively:war. air.masses(ΔT24h>4°C)r.duced the PM_(2.5) concentr.tion wher.as weaker.winds(∣V∣_(aver.ge)r.ased it;and(4)PM_(2.5) concentr.tion decr.ased shar.ly within 4 h after.the passage of str.ng cold air.masses,but mor. gr.dually within 14 h after.the passage of str.ng war. air.*** r.sults consider.bly impr.ve the cur.ent under.tanding of the influence of cold and war. air.masses on local pollution patter.s.

关键词： weather.type air.mass enhancement r.moval meteor.logical condition