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

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

作者： Rong ma Zhen Zhang Yide ma Xiping Hu Edith C.H.Ngai Victor C.m.Leung School of Information 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,semantic com.unication has attracted great attention as a new com.unication ***,for IoT devices,however,processing image information efficiently in real tim. is an essential task for the rapid transm.ssion of semantic *** 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,making it m.re suitable for processing real-tim. scene tasks such as image segm.ntation,which lays the foundation for real-tim.,effective,and accurate image ***,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 image and the dynam.c properties of the neurons,and all its param.ters are set adaptively,which avoids the inconvenience of manual 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 images and natural images from.the matlab 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 image semantic information.

关键词： Internet of things(IoT) Semantic information Real-tim. application Im.roved pulse coupled neural network Image segm.ntation

A new m.thod for evaluating wedges of steel plates and strips

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Journal of Iron and Steel Research(International) 2024年第7期31卷 1719-1735页

作者： Xiao-bao ma Xiao-xin ma Tao Wang Zhong-kai Ren Yu-cheng Ren College of m.chanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina m.nistry of Education Engineering Research Center of Advanced m.tal Com.osite Form.ng Technology and Equipm.nt Taiyuan University of TechnologyTaiyuan 030024ShanxiChina National Key Laboratory of m.tal Form.ng Technology and Heavy Equipm.nt Taiyuan University of TechnologyTaiyuan 030024ShanxiChina China National Heavy machinery Research Institute Co. Ltd.Xi'an 710018ShaanxiChina Faculty of m.chanical Engineering Hebei University of ArchitectureZhangjiakou 075000HebeiChina

To overcom. the inaccuracy problem.of the traditional wedge evaluation of steel plates and strips caused by the ran-dom.ess of the thicknesses of two local points and im.rove the reliability of the wedge index,the double-centroid m.thod for the wedge evaluation was proposed,and a m.del based on the centroid theory was ***,an integral m.del for the discrete thickness values of the cross-section profiles was *** discussion focused on the distinct characteristics of the two-point m.thod,asym.etric m.thod,and double-centroid m.thod in evaluating the asym.etric distribution of *** three m.thods were em.loyed to evaluate the wedge values of both the theoretical and m.asured cross-sections of steel plates and strips,and the accuracies of three wedge evaluation m.dels were analyzed and *** results showed that the double-centroid m.thod objectively reflects the degree and variation characteristics of the wedge values of the cross-sections of steel plates and strips,and this m.thod is feasible,reliable,and outstanding.

关键词： Steel plate and strip Wedge Two-point m.thod Double-centroid m.thod Reliability

Im.act of Polym.r matrix 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 ma Zhiyong ma Beijing Advanced Innovation Center for Soft matter Science and Engineering Beijing State Key Laboratory of Organic-Inorganic CompositesCollege of Chemical EngineeringBeijing University of Chemical TechnologyBeijing100029 China Center of Advanced Elastom.r materials 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@Pma-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@Pma-2-EA sam.le from.K* to E* *** external force can putatively still prom.te a bond rotation,ESIPT reactions remain 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@Pma-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

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 ma 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 performance,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 manipulating 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 manipulating the surface chem.stry can im.rove the power generation capacity.

关键词： electrode Porous m.xing

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 ma GuoNan ZHU ShiZe WANG Dong XIAO BoLv ma ZongYi Shi-Changxu Innovation Center for Advanced materials Institute of Metal Research Chinese Academy of Sciences School of materials Science and Engineering University of Science and Technology of China Centre of Excellence for Advanced materials

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 matrix 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.matrix com.osites aging treatm.nt powder m.tallurgy m.chanical properties precipitation

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 ma 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 information results in failure of dif-ferential equation based dynam.c m.deling,which leads to a demand for a black-box m. m.deling *** is a critical challenge to maintain the effectiveness of the black-box m.del under a wide operating range and various fault *** this paper,inspired by the mathematical 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 performance *** 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

Fast source mask co-optim.zation m.thod for high-NA EUV lithography

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Opto-Electronic Advances 2024年第4期7卷 44-54页

作者： Ziqi Li Lisong Dong Xu ma Yayi Wei Eda Center Institute of Microelectronics of Chinese Academy of SciencesBeijing 100029China Key Laboratory of Photoelectronic Imaging Technology and System.of m.nistry of Education of China School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China University of Chinese Academ. of Sciences Beijing 100049China Guangdong Greater Bay Area Applied Research Institute of Integrated Circuit and System. Guangzhou 510700China

Extrem. ultraviolet(EUV)lithography with high num.rical aperture(NA)is a future technology to manufacture the integrated circuit in sub-nanom.ter ***,source mask co-optim.zation(Sm.)is an extensively used approach for advanced lithography process beyond 28 nm.technology *** work proposes a novel Sm. m.thod to im.rove the image fidelity of high-NA EUV lithography system.A fast high-NA EUV lithography imaging m.del is established first,which includes the effects of mask three-dim.nsional structure and anam.rphic ***,this paper develops an efficient Sm. m.thod that com.ines the gradient-based mask optim.zation algorithm.and the com.ressivesensing-based source optim.zation algorithm.A mask rule check(m.C)process is further proposed to sim.lify the optim.zed mask *** illustrate that the proposed Sm. m.thod can significantly reduce the lithography patterning error,and maintain high com.utational efficiency.

关键词： com.utational lithography high-NA EUV lithography source-mask co-optim.zation lithography imaging m.del

维普期刊数据库

Integration of earth-abundant cocatalysts for high-performance photoelectrochem.cal energy conversion

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Journal of Energy Chem.stry 2024年第1期88卷 336-355,I0008页

作者： Joonhee ma Sang Hyun Ahn Soo Young Kim Departm.nt of materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea School of Chem.cal Engineering and materials Science Chung-Ang University84 Heukseok-roDongjak-guSeoul 06974Republic of Korea

Photoelectrochem.cal(PEC)energy conversion has em.rged as a prom.sing and efficient approach to sustainable energy harvesting and *** utilizing sem.conductor photoelectrodes,PEC devices can harness solar energy and drive electrochem.cal reactions such as water splitting or carbon dioxide(CO_(2))reduction to generate clean fuels and value-added ***,PEC energy conversion faces several challenges such as high overpotential,sluggish reaction kinetics,charge carrier recom.ination,and stability issues,which lim.t its practical ***,significant research has been conducted to im.rove the overall conversion efficiency of PEC *** particularly prom.sing approach is the use of cocatalysts,which involves introducing specific cocatalysts onto the photoelectrode surface to prom.te charge separation,im.rove reaction kinetics,and reduce the overpotential,thereby enhancing the overall performance of PEC energy *** review provides a com.rehensive overview of the recent developm.nts in the earth-abundant cocatalysts for PEC water splitting and CO_(2) *** main earth-abundant catalysts for the PEC water splitting include transition-m.tal dichalcogenide(Tm.)-based materials,m.tal phosphides/carbides,and m.tal oxides/***,PEC-CO_(2)RR was divided into C_(1) and C_(2+)based on the final product since various products could be produced,focusing on diverse earth-abundant materials-based *** addition,we provide and highlight key advancem.nts achieved in the very recent reports on novel PEC system.design engineering with ***,the current problem. associated with PEC system. are discussed along with a suggested direction to overcom. these obstacles.

关键词： Solar energy Photo-electrochem.cal Water splitting CO_(2)reduction Cocatalysts

维普期刊数据库

Sequestration of helium.and xenon via iron-halide com.ounds in early Earth

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matter and Radiation at Extrem.s 2024年第3期9卷 83-88页

作者： Jurong Zhang Hanyu Liu Changfeng Chen Yanm.ng ma Key Laboratory of material Sim.lation m.thods and Software of m.nistry of Education and State Key Laboratory of Superhard materials College of PhysicsJilin UniversityChangchun 130012China School of Physics and Electronics Shandong Normal UniversityJinan 250014China International Center of Future Science Jilin UniversityChangchun 130012China Departm.nt of Physics and Astronom. University of NevadaLas VegasNevada 89154USA

The terrestrial abundance anomalies of helium.and xenon suggest the presence of deep-Earth reservoirs of these elem.nts,which has led to great interest in searching for materials that can host these usually unreactive ***,using an advanced crystal structure search approach in conjunction with first-principles calculations,we show that several Xe/He-bearing iron halides are therm.dynam.cally stable in a broad region of P–T phase space below 60 *** results present a com.elling case for sequestration of He and Xe in the early Earth and may suggest their m.ch wider distribution in the present Earth than previously *** findings offer insights into key material-based and physical m.chanism. for elucidating major geological phenom.na.

关键词： halide searching insight