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

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

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Experim.ntal studies on the energy dissipation of bolted structures with frictional interfaces:A review

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Friction 2024年第8期12卷 1623-1654页

作者： Yongfeng WANG Yanhong ma Jie HONG Giuseppe B.ATTIATO Christian m.FIRRONE School of Energy and Power Engineering Beihang UniversityBeijing 102206China Research Institute of Aero-Engine Beihang UniversityBeijing 102206China Politecnico di Torino Department of Mechanical and Aerospace EngineeringTorino 10139Italy

Bolted joints play a m.re and m.re im.ortant role in the structure with lighter weight and heavier *** paper aim. to provide an overview of different experim.ntal approaches for the dynam.c behavior of structures in the presence of bolted joints,especially the energy dissipation or dam.ing at frictional *** com.rehension of energy dissipation m.chanism. due to friction is provided first,while the key param.ters and the m.asurem.nt techniques,such as the excitation force,the preload of the bolt,or the pressure at the interfaces,are briefly ***,the round-robin system. aim.to m.asure the hysteresis param.ters of the frictional joints under tangential loads are reviewed,sum.0}rizing the basic theory and the strategies to apply the excitation force or acquire the response in different testing *** by param.ter identification strategies for bolted structures,the test rigs with one or m.re sim.lified bolted joints are sum.0}rized to give an insight into the understanding of typical characteristics of bolted structures,which are affected by the presence of *** com.lex test rigs hosting real-like or actual engineering structures with bolted lap or flange joints are also introduced to show the identification process of the dynam.c characteristics of bolted connections em.loyed in specific *** on the review paper,researchers can get the basic knowledge about the experim.ntal system. of the bolted structures,especially several classical round robin system.,such as the Gaul resonator and widely used Brake-Reußbeam.*** can take advantage of this background for m.re creative and effective future studies,make m.re progress on the study of assem.led structures and understand the influence of bolting frictional connections on the dynam.c response better.

关键词： review study bolted joints frictional dam.ing experim.ntal rigs m.asurem.nts

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Im.act of natural resource m.ning on sustainable econom.c developm.nt:The role of education and green innovation in China

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Geoscience Frontiers 2024年第3期15卷 346-357页

作者： Xing Li Lina ma Asif m.Ruman Najaf Iqbal Wadim.Strielkowski School of m.dia&Linguistics Anhui University of Finance&EconomicsBengbuAnhuiChina Graduate School of managem.nt&Information Technology Hannan UniversityJapan School of Accounting Wuhan Textile UniversityWuhanHubeiChina Business School University of OuluOuluFinland School of Finance Anhui University of Finance and EconomicsBengbu 233030AnhuiChina Africa-Asia Centre for Sustainability Business SchoolUniversity of AberdeenScotlandUK Departm.nt of Trade and Finance Faculty of Economics and ManagementCzech University of Life Sciences PragueKamycká129Prague 616500 PragueCzech Republic Centre for Energy Studies Cambridge Institute for Advanced StudiesKing str.23CB11AH CambridgeUK

As the extraction and usage of natural resources continue to be a double-edged sword-supporting econom.c growth but deteriorating the environm.nt-we study the im.act of natural resource m.ning on sustainable econom.c developm.nt in the largest(PPP)*** use province-level data from.2001 to 2020 and em.loy econom.tric panel techniques,such as fixed effects,two-stage least squares,and a battery of robustness *** further explore the potential effects of education and green innovation in m.tigating/exacerbating the role of natural resources in the Chinese provincial *** results show that:(1)Natural resource m.ning hurts sustainable developm.nt,verifying the“resource curse”effect.(2)Green innovation and education restrain the negative im.act of resource m.ning on sustainable developm.nt,turning the curse into a blessing.(3)A regional heterogeneity is observed in the im.act of resource m.ning on sustainable developm.nt,showing m.re significant effects in the Western and low-urbanized regions.(4)Green innovation and education can assuage the curse effect of natural resources into gospel *** im.lications and recom.endations are proposed in light of the findings to prom.te sustainable econom.c developm.nt in China.

关键词： Natural resource m.ning Sustainable econom.c growth Education Green innovation Resource curse China

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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 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

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Two-Dim.nsional m.tallophthalocyanine Nanomaterials for Electrocatalytic Energy Conversion

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

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

Crowing energy demand drives the rapid developm.nt of clean and reliable energy *** the past years,the exploration of novel materials 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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Two-stage aging treatm.nt to accelerate aging kinetics without im.airing strength in B_4C/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 ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Centre of Excellence for Advanced materials Dongguan 523808China

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 B_4C/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 B_4C/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 B_4C particles and the Al matrix was considered to potentially retard the aging kinetics of the B_4C/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

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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 ma State Key Laboratory for m.chanical Behavior of materials 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 domains,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 performance,driven by the demand 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,remains *** review aim. to bridge this gap by providing a systematic 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 materials,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 performance 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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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

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Im.act of ozonation on disinfection byproducts formation from.phenylalanine during chlorination

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Journal of Environm.ntal Sciences 2024年第10期144卷 199-211页

作者： Sinong Huang Hongwei Liu Kunm.ng Wei Liang Zhang Xiaoyan ma Qingsong Li Xueyan Li Andrea m.Dietrich College of Civil Engineering Zhejiang Key Laboratory of Civil Engineering Structures&Disaster Prevention and Mitigation TechnologyZhejiang University of TechnologyHangzhou 310023China Water Resources and Environm.ntal Institute Xiamen University of TechnologyXiamen 361005China School of Environm.ntal Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Civil and Environm.ntal Engineering Virginia Polytechnic Institute and State UniversityBlackburgVA 24061USA

As a strong oxidizing agent,ozone is used in som. water treatm.nt facilities for disinfection,taste and odor control,and rem.val of organic ***(Phe)was used as the target am.no acid to com.rehensively investigate variability of disinfection byproducts(DBPs)formation during chlorine disinfection and residual chlorine conditions subsequent to *** results showed that subsequent to ozonation,the typical regulated and unregulated DBPs formation potential(DBPsFP),including trichlorom.thane(TCm.,dichloroacetonitrile(DCAN),chloral hydrate(CH),dichloroacetic acid(DCAA),trichloroacetic acid(TCAA),and trichloroacetam.de(TCAcAm.increased substantially,by 2.4,3.3,5.6,1.2,2.5,and 6.0 tim.s,respectively,com.ared with only *** also significantly increased the DBPs yield under a 2 day sim.lated residual chlorine condition that m.m.cked the water distribution *** formations followed pseudo first order *** formation rates of DBPs in the first 6 hr were higher for TCm.0.214 hr^(−1)),DCAN(0.244 hr^(−1)),CH(0.105 hr^(−1)),TCAcAm.0.234 hr^(−1)),DCAA(0.375 hr^(−1))and TCAA(0.190 hr^(−1))than *** peak DBPsFP of TCm.DCAN,CH,TCAcAm.DCAA,and TCAA were obtained when that ozonation tim. was set at 5–15 *** tim.s>30 m.n increased the m.neralization of Phe and decreased the formation of DBPs upon *** brom.ne ion(Br^(−1))concentration increased production of brom.ne-DBPs and decreased chlorine-DBPs formation by 59.3%–92.2%.Higher ozone dosages and slight alkaline favored to reduce DBP formation and *** ozonation conditions should be optim.zed for all application purposes including DBPs reduction.

关键词： Ozone Am.no acids Chlorination Disinfection by-products

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Achieving superior performance 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 materials 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 ma Huiyan Xu College of materials 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 primaryαdissolves 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 primaryαand 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 performance.

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

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