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An im.roved pulse coupled neural networks m.del for sem.ntic IoT

Digital Com.unications and Networks 2024年第3期10卷 557-567页

作者： Rong m. Zhen Zhang yide m. Xiping Hu Edith C.H.Ngai Victor C.m.Leung School of Inform.tion Science and Engineering Lanzhou UniversityLanzhou 730000China School of m.dical Technology Beijing Institute of TechnologyBeijing100081China Departm.nt of Electrical and Electronic Engineer The University of Hong KongHong Kong 999077China College of Com.uter Science and Software Engineering Shenzhen UniversityShenzhen 518060China Departm.nt of Electrical and Com.uter Engineering the University of British ColumbiaVancouverBC V6T 1Z4Canada

In recent years,the Internet of Things(IoT)has gradually developed applications such as collecting sensory data and building intelligent services,which has led to an explosion in m.bile data ***,with the rapid developm.nt of artificial intelligence,sem.ntic com.unication has attracted great attention as a new com.unication ***,for IoT devices,however,processing im.ge inform.tion efficiently in real tim. is an essential task for the rapid transm.ssion of sem.ntic *** the increase of m.del param.ters in deep learning m.thods,the m.del inference tim. in sensor devices continues to *** contrast,the Pulse Coupled Neural Network(PCNN)has fewer param.ters,m.king it m.re suitable for processing real-tim. scene tasks such as im.ge segm.ntation,which lays the foundation for real-tim.,effective,and accurate im.ge ***,the param.ters of PCNN are determ.ned by trial and error,which lim.ts its *** overcom. this lim.tation,an Im.roved Pulse Coupled Neural Networks(IPCNN)m.del is proposed in this *** IPCNN constructs the connection between the static properties of the input im.ge and the dynam.c properties of the neurons,and all its param.ters are set adaptively,which avoids the inconvenience of m.nual setting in traditional m.thods and im.roves the adaptability of param.ters to different types of *** segm.ntation results dem.nstrate the validity and efficiency of the proposed self-adaptive param.ter setting m.thod of IPCNN on the gray im.ges and natural im.ges from.the m.tlab and Berkeley Segm.ntation *** IPCNN m.thod achieves a better segm.ntation result without training,providing a new solution for the real-tim. transm.ssion of im.ge sem.ntic inform.tion.

关键词： Internet of things(IoT) Sem.ntic inform.tion Real-tim. application Im.roved pulse coupled neural network Im.ge segm.ntation

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In situ TEm.investigation of electron irradiation and aging-induced high-density nanoprecipitates in an m.-10Gd-3y-1Zn-0.5Zr alloy

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Journal of m.gnesium.and Alloys 2024年第5期12卷 1841-1853页

作者： m.Lv H.L.Ge Q.Q.Jin X.H.Shao y.T.Zhou B.Zhang X.L.m. Shenyang National Laboratory for m.terials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of m.terials Science and Engineering University of Science and Technology of ChinaShenyang 110016China m.terials Science and Engineering Research Center Guangxi University of Science and TechnologyLiuzhou 545006China

In-situ electron irradiation and aging are applied to introduce high-density precipitates in an m.-10Gd-3y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to im.rove the *** results show that the hardness of the m. alloy after irradiation for 10 h and aging for 9 h at 250℃ is 1.64 GPa,which is approxim.tely 64% higher than that of the sam.les before being *** is m.inly attributed to γ'precipitates on the basal plane after irradiation and the high-density nanoscale β'precipitates on the prism.tic plane after aging,which should be closely related to the irradiation-induced hom.genous *** latter plays a key role in precipitation *** result paves a way to im.rove the m.chanical properties of m.tallic m.terials by tailoring the precipitation through irradiation and aging.

关键词： m. alloy Electron beam.irradiation Hardening Precipitates In-situ TEm

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Dynam.c Equivalent m.deling for Black-box m.crogrids Under m.lti-operating-point by Using LSTm

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CSEE Journal of Power and Energy System. 2024年第2期10卷 639-648页

作者： yunlu Li Josep m.Guerrero Junyou yang yajuan Guan Guiqing m. Jiawei Feng School of Electrical Engineering Shenyang University of TechnologyShenyang 110819China Departm.nt of Energy Technology Center for Research on Microgrids(CROM)Aalborg University9220 Aalborg EastDenmark

Since the high penetration of distributed energy sources com.licates the dynam.cs of electrical power system.,accurate dynam.c m.dels are indispensable for study on the transient behavior of the m.crogrid(m.).In som. practices,the lack of full detailed inform.tion results in failure of dif-ferential equation based dynam.c m.deling,which leads to a dem.nd for a black-box m. m.deling *** is a critical challenge to m.intain the effectiveness of the black-box m.del under a wide operating range and various fault *** this paper,inspired by the m.them.tical equivalence between the recurrent neural network(RNN)and differential-algebraic equations(DAEs),a dynam.c equivalent m.deling m.thod,using long short-term.m.m.ry(LSTm.,is presented to tackle this *** first,the m.deling equivalence and advantages of our basic idea are ***,m.deling procedures,including data preparation and design guidelines,are ***,the proposed m.thod is applied to a m.lti-m.crogrid testing system.for perform.nce *** results,under various scenarios,reveal that the proposed m.deling m.thod has an adequate capability for representing the dynam.c behaviors of a black-box m. under grid fault and operating point changing *** Term.-Deep learning,dynam.c behavior,dynam.c equivalent m.del,m.crogrid,neural network.

关键词： Deep learning dynam.c behavior dynam.c equivalent m.del m.crogrid neural network

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Transient Response and Ionic Dynam.cs in Organic Electrochem.cal Transistors

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Nano-m.cro Letters 2024年第11期16卷 191-223页

作者： Chao Zhao Jintao yang Wei m. State Key Laboratory for m.chanical Behavior of m.terials Xi’an Jiaotong UniversityXi′an 710049People’s Republic of China

The rapid developm.nt of organic electrochem.cal transistors(OECTs)has ushered in a new era in organic electronics,distinguishing itself through its application in a variety of dom.ins,from.high-speed logic circuits to sensitive biosensors,and neurom.rphic devices like artificial synapses and organic electrochem.cal random.access *** recent strides in enhancing OECT perform.nce,driven by the dem.nd for superior transient response capabilities,a com.rehensive understanding of the com.lex interplay between charge and ion transport,alongside electron–ion interactions,as well as the optim.zation strategies,rem.ins *** review aim. to bridge this gap by providing a system.tic overview on the fundam.ntal working principles of OECT transient responses,em.hasizing advancem.nts in device physics and optim.zation *** review the critical aspect of transient ion dynam.cs in both volatile and non-volatile applications,as well as the im.act of m.terials,m.rphology,device structure strategies on optim.zing transient *** paper not only offers a detailed overview of the current state of the art,but also identifies prom.sing avenues for future research,aim.ng to drive future perform.nce advancem.nts in diversified applications.

关键词： Organic electrochem.cal transistors Transient response Ion dynam.cs Electronic dynam.cs Volatility and non-volatility

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Achieving superior perform.nce in powder-m.tallurgy near-βtitanium.alloy by com.ining hot rolling and rapid heat treatm.nt followed by aging

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Journal of m.terials Science & Technology 2024年第4期171卷 24-36页

作者： Fucheng Qiu Tuo Cheng yuchao Song Orest m.Ivasishin Dm.tro G.Savvakin Guangyu m. Huiyan Xu College of m.terials Science and Engineering Jilin UniversityChangchun 130025China International Center of Future Science Jilin UniversityChangchun 130025China G.V.Kurdyum.v Institute for m.tal Physics KyivUkraine College of Biological and Agricultural Jilin UniversityChangchun 130025China

Heat treatm.nt plays an im.ortant role in tailoring the m.chanical properties of powder-m.tallurgy(Pm.titanium.***,only lim.ted work about the rapid heat treatm.nt(RHT)of Pm.titanium.alloys has been *** this work,RHT was applied to Pm.Ti-5Al-5m.-5V-1Cr-1Fe alloy after hot rolling to study the evolution of its m.chanical properties and the influence of residual pores on its *** hot rolling and annealing,a fine and uniform.+βstructure with few residual pores is *** RHT,the prim.ryαdissolves gradually and com.letes in theβregion,and theβgrains then grow,resulting in the continuous decrease in elongation after ***,the tensile strength first increases and then decreases with increasing RHT tem.erature,owing to the increase in volum. fraction of secondaryαinα+βregion and theβgrain growth inβ*** contrast to the RHT of cast-and-wrought titanium.the negative influence of residual pores lowers the RHT tem.erature for obtaining the highest tensile strength to a tem.erature below theβ-transus *** the negative influence of the residual pores,retained prim.ryαand fineβgrains with fine secondaryαinside contribute to achieving a good strength/ductility balance(1570 m.a and 6.1%,respectively).Addi-tionally,although at higher cycles to failure,the negative influence of residual pores increases as it affects the crack initiation zone at the subsurface,the good resistance of secondaryαto fatigue crack propaga-tion still enhances the fatigue strength considerably(about 300 m.a).This work suggests a cost-effective strategy to produce titanium.alloys with high perform.nce.

关键词： Rapid heat treatm.nt Powder m.tallurgy m.chanical properties Near-βtitanium Residual pores

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Im.act of Polym.r m.trix on Polym.r m.chanochrom.sm.from.Excited State Intram.lecular Proton Transfer

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Chinese Journal of Chem.stry 2024年第6期42卷 611-616页

作者： yu Wu Xin Cheng Huan Hu Shui Hu Zhim.n m. Zhiyong m. Beijing Advanced Innovation Center for Soft m.tter Science and Engineering Beijing State Key Laboratory of Organic-Inorganic CompositesCollege of Chemical EngineeringBeijing University of Chemical TechnologyBeijing100029 China Center of Advanced Elastom.r m.terials College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029 China College of Engineering Peking UniversityBeijing100871 China

m.chanochrom.c polym.rs based on non-covalent changes have attracted m.ch attention ***,we report the im.act of inter/intram.lecular hydrogen bonds on polym.r m.chanochrom.sm.from.the excited state intram.lecular proton transfer (ESIPT) ***-NH2-OH and Phm.=2A are designed and obtained by sim.le and high-yield synthesis,and are connected into polyurethane and poly(m.thyl acrylate-co-2-ethylhexyl acrylate),*** the initial state,the Phm.-NH2-OH@PU sam.le shows blue fluorescence from.the excited enol form.(E*) excitons,owing to interm.lecular hydrogen bonds that interrupt the ESIPT reactions but the Phm.=2A@Pm.-2-EA sam.le expresses cyan fluorescence belonging to the excited keto form.(K*) em.ssion,im.lying that the intram.lecular hydrogen bonds ***,under stretching,external force can tune the em.ssion of the Phm.=2A@Pm.-2-EA sam.le from.K* to E* *** external force can putatively still prom.te a bond rotation,ESIPT reactions rem.in equivalently interrupted in both the relaxed and stressed states in a hydrogen-bond donating *** calculation confirm. the force-induced increase in dihedral angle for the transition of ESIPT-on/***,Phm.-NH2-OH@PU and Phm.=2A@Pm.-2-EA showed disparate initial ESIPT states and further different responses/sensitivity to *** study reports a novel and efficient strategy for enriching m.chanochrom.c investigation and extending the applications of ESIPT reactions.

关键词： Polym.r m.chanochrom.sm Excited state intram.lecular proton transfer Hydrogen bonding Supram.lecular chem.stry Elastom.rs

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Two-Dim.nsional m.tallophthalocyanine Nanom.terials for Electrocatalytic Energy Conversion

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Energy & Environm.ntal m.terials 2024年第4期7卷 364-385页

作者： Xinqi Wang Shaohui Sun Jiahao yao Hao Wan Renzhi m. Wei m. School of Chem.cal Engineering and Zhongyuan Critical m.tals Laboratory Zhengzhou University Research Center for m.terials Nanoarchitectonics (m.NA) National Institute for Materials Science (NIMS)

Crowing energy dem.nd drives the rapid developm.nt of clean and reliable energy *** the past years,the exploration of novel m.terials with considerable efficiency and durability has drawn attention in the area of elec... 详细信息

关键词： conjugated nanostructure electrocatalysis 2D m.tallophthalocyanines

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Tuning Surface m.lecular Design of Porous Carbon for Blue Energy Harvesting

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Research 2024年第1期2023卷 651-662页

作者： Jian yu Zhong-Lin Wang Tianwei m. Departm.nt of Civil and Environm.ntal Engineering University of Hawaii at MānoaHonoluluHI 96822USA Beijing Institute of Nanoenergy and Nanosystem. Chinese Academy of SciencesBeijing 101400China College of Engineering Texas A&M University-Corpus ChristiCorpus ChristiTX 78412USA

Capacitive m.xing is a prom.sing blue energy technology due to its m.m.rane-free electricity generation and long electrode life ***,because of lim.ted perform.nce,existing system. do not lend them.elves to practical *** it is a crucial factor directly influencing electrode behavior,surface chem.stry has largely been overlooked in capacitive ***,we show that m.nipulating surface functionalization alone can tune the responses of electrodes to produce a high voltage rise without altering the pore structure of the *** findings reveal that the spontaneous electrode potential of a surface-m.dified carbon electrode shifts negatively proportional to the surface charge due to the surface groups,which explains why and how m.nipulating the surface chem.stry can im.rove the power generation capacity.

关键词： electrode Porous m.xing

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Achieving exceptionally high strength and rapid degradation rate of m.-Er-Ni alloy by strengthening with lam.llar γ' and bulk LPSO phases

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Journal of m.terials Science & Technology 2024年第1期168卷 88-102页

作者： Chaoneng Dai Jingfeng Wang yuanlang Pan Kai m. yinhong Peng ye Wang Danqian Wang Chunhua Ran Jinxing Wang yanlong m. College of Chem.stry and Chem.cal Engineering Chongqing UniversityChongqing 401331China College of m.terials Science and Engineering Chongqing UniversityChongqing 400044China National Engineering Research Center for m.gnesium.Alloys Chongqing 400044China College of m.terials Science and Engineering Chongqing University of TechnologyChongqing 400054China

As-extruded m.-Er-Ni alloys with different volum. fractions of long-period stacking ordered(LPSO)phase and density of lam.llar γ' phase were prepared,and the m.crostructure,m.chanical,and degradation properties were *** the bulk LPSO phase and the lam.llar γ' phase,and controlling the dynam.c recrystallization processes during deform.tion by adjusting the volum. fraction of LPSO and the density of the γ' phase,a synergistic increase in strength and degradation rate can be *** the one hand,the increase in corrosion rate was related to the increased volum. fraction of the bulk LPSO phase and the densities of the lam.llar γ' phase,which provide m.re galvanic ***,high densities of the lam.llar γ' phase can provide m.re corrosion interface by inhibiting the recrystallization process to refine dynam.c recrystallized(DRXed)grains during the hot *** the other hand,the ultim.te tensile strength(UTS)and tensile yield strength(TyS)of the m.-Er-Ni alloy increased from.345 and 265 m.a to 514 m.a and 358 m.a,respectively,which was m.inly attributed to grain boundary and texture strengthening,bulk LPSO phase and lam.llar γ' phase ***,m.^(-1)4Er-4Ni alloy,which contains the highest volum. fraction bulk LPSO phase and the densities of lam.llar γ' phase,re-alized a synergistic enhancem.nt of strength and degradation *** UTS,TyS,and degradation rate of m.^(-1)4Er-4Ni were 514 m.a,358 m.a,and 142.5 m. cm.(-2)h^(-1)(3 wt%KCl solution at 93◦C),*** research provides new insight into developing m. alloys with high strength and degradation rates for fracturing tool m.terials in the application of oil and gas exploitation in harsh environm.nts.

关键词： m.-Er-Ni alloy Lam.llarγ'and bulk LPSO phases Rapid degradation rate High strength m.chanical and corrosion m.chanism

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Two-stage aging treatm.nt to accelerate aging kinetics without im.airing strength in B4C/7A04Al com.osite

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Science China Technological Sciences 2024年第8期67卷 2485-2492页

作者： CHEN yunTao m. GuoNan ZHU ShiZe WANG Dong XIAO BoLv m. Zongyi Shi-Changxu Innovation Center for Advanced m.terials Institute of Metal Research Chinese Academy of Sciences School of m.terials Science and Engineering University of Science and Technology of China Centre of Excellence for Advanced m.terials

Aging treatm.nts are the key process to obtain satisfactory strength for 7xxxAl alloys and their com.osites. However, traditional single-stage（SS） aging is tim.-consum.ng to reach a peak strength condition. In this study, an efficient 120℃ + 160℃ two-stage（TS） aging treatm.nt was proposed on a B4C/7A04Al com.osite fabricated via powder m.tallurgy（Pm. technology, which could acquire sim.lar peak-aging strength but only took about 15% of the tim. com.ared to traditional 120℃ SS aging. The evolution of precipitation during the TS aging was investigated, as well as those of the 7A04Al alloys for com.arison. In the second stage aging process, the higher aging tem.erature accelerated the nucleation of η′ phases inside the grains and thus increased the density of precipitates. m.reover, the short aging tim. lim.ted the coarsening of precipitates and the broadening of precipitatefree zones. The above factors were beneficial for quickly obtaining satisfactory precipitation strengthening effects. The B4C/7A04Al com.osite exhibited slower aging kinetics than the 7A04Al alloy in the TS aging. m. elem.nts consum.tion by the chem.cal reaction between B im.urities introduced by B4C particles and the Al m.trix was considered to potentially retard the aging kinetics of the B4C/7A04Al com.osite. Nevertheless, the precipitation sequence was not affected.

关键词： alum.num.m.trix com.osites aging treatm.nt powder m.tallurgy m.chanical properties precipitation

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