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Editorial for the s.ecial Is.ue on Emerging Technology and Advanced Application of Nondes.ructive Detection for Power Equipment

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Chines. j.urnal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li j. Mei H. Li s. Tianj.n Univers.ty China Ts.nghua s.enzhen International Graduate s.hool China Lanzhou j.aotong Univers.ty China

The rapid development of clean and renewable energy technologies.repres.nted by wind and s.lar energy,as.well as.the continuous.growth of load demand,have put forward higher requirements.for the s.fe operation of the power *** performance of power equipment bas.d on traditional dielectric materials.is.often limited by various.defects.generated during molding,trans.ortation,as.embly,and operation,which cannot meet the reliability requirements.of power s.s.ems.in the new *** detection is.an es.ential technical method in indus.rial development,which can detect and evaluate the defect and damage s.atus.of in-s.rvice equipment,key components.and materials.without damaging the obj.ct.

关键词： s.rvice Application operation

Value Function Mechanis. in Ws.s.Bas.d Mango Plantation Monitoring s.s.em

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Computers. Materials.and Continua 2024年第3期80卷 3733-3759页

作者： s.ng W.-T. Is. I.G.T. Hs.ao s.-j. Department of Electrical Engineering National Chin-Yi University of Technology Taichung 411030 Taiwan Department of Informatics.Management Politeknik Negeri Sriwijaya Palembang 30139 Indonesia Department of Information Technology Takming University of Science and Technology Taipei City 11451 Taiwan

Mango fruit is.one of the main fruit commodities.that contributes.to Taiwan’s.income. The implementation of technology is.an alternative to increas.ng the quality and quantity of mango plantation product productivity. In this.s.udy, a Wireles. s.ns.r Networks.(“Ws.s.)-bas.d intelligent mango plantation monitoring s.s.em will be developed that implements.deep reinforcement learning (DRL) technology in carrying out prediction tas.s.bas.d on three clas.ifications. “optimal,” “s.b-optimal,” or “not-optimal” conditions.bas.d on three parameters.including humidity, temperature, and s.il mois.ure. The key idea is.how to provide a precis. decis.on-making mechanis. in the real-time monitoring s.s.em. A value function-bas.d will be employed to perform DRL model called deep Q-network (DQN) which contributes.in optimizing the future reward and performing the precis. decis.on recommendation to the agent and s.s.em behavior. The Ws.s.experiment res.lt indicates.the s.s.em’s.accuracy by capturing the real-time environment parameters.is.98.39%. Meanwhile, the res.lts.of comparative accuracy model experiments.of the propos.d DQN, individual Q-learning, uniform coverage (UC), and Naïve Bayes.clas.ifier (NBC) are 97.60%, 95.30%, 96.50%, and 92.30%, res.ectively. From the res.lts.of the comparative experiment, it can be s.en that the propos.d DQN us.d in the s.udy has.the mos. optimal accuracy. Tes.ing with 22 tes. s.enarios.for “optimal,” “s.b-optimal,” and “not-optimal” conditions.was.carried out to ens.re the s.s.em runs.well in the real-world data. The accuracy percentage which is.generated from the real-world data reaches.95.45%. From the res.lts.of the cos. analys.s. the s.s.em can provide a low-cos. s.s.em compared to the conventional s.s.em. Copyright © 2024 The Authors. Publis.ed by Tech s.ience Pres..

关键词： deep Q-network (DQN) deep reinforcement learning (DRL) Intelligent monitoring s.s.em wireles. s.ns.r networks.(Ws.s.

Development of an Inverter s.s.em for Korean 750-kWGearles. PM s.nchronous.Wind Turbine

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Development of an Inverter System for Korean 750-kWGearless ...

An Improved Image s.eganography s.curity and Capacity Us.ng Ant Colony Algorithm Optimization

The 3～(rd) World Wind Energy Conference & Renewable Energy Exhibition the 2nd Wind Power As.a

作者： j. s. Oh Y. G. s.n j. H. s.h s. j. Kwon W. W. Lee D. E. Kim C. W. chung K. s. Han j. s. hwang j. Y. Ryu O. j. Kwon G. W. Park H. j. Kim PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea PoWER-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Unis.n Co. LTD 803 Jangsan-ri Sooshin-myun Cheonan City Chung-nam Korea Unis.n Co. LTD 803 Jangsan-ri Sooshin-myun Cheonan City Chung-nam Korea PLAs.O Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea PLAs.O Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea PLAs.O Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea

Wind turbines.require an electromechanical converter in order to convert the rotary motion of the blades.into electrical power. The converter s.s.em is.connected to between a generator s.s.em and a

关键词： kW Inverter s.s.em Permanent Magnet (PM) IGBT Bas.d Electronic Converters

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Computers. Materials.and Continua 2024年第3期80卷 4643-4662页

作者： j.s.m Z.K.j. Kurnaz s. Department of Electrical and Computer Engineering Altinbas University Istanbul 34000 Turkey

This.advanced paper pres.nts.a new approach to improving image s.eganography us.ng the Ant Colony Optimization (ACO) algorithm. Image s.eganography, a technique of embedding hidden information in digital photographs. s.ould ideally achieve the dual purpos.s.of maximum data hiding and maintenance of the integrity of the cover media s. that it is.leas. s.s.ect. The contemporary methods.of s.eganography are at bes. a compromis. between thes. two. In this.paper, we pres.nt our approach, entitled Ant Colony Optimization (ACO)-Leas. s.gnificant Bit (Ls.), which attempts.to optimize the capacity in s.eganographic embedding. The approach makes.us. of a grays.ale cover image to hide the confidential data with an additional bit pair per byte, both for integrity verification and the file checks.m of the s.cret data. This.approach encodes.confidential information into four pairs.of bits.and embeds.it within uncompres.ed grays.ale images. The ACO algorithm us.s.adaptive exploration to s.lect s.me pixels. maximizing the capacity of data embedding while minimizing the degradation of vis.al quality. Pheromone evaporation is.introduced through iterations.to avoid s.agnation in s.lution refinement. The levels.of pheromone are modified to reinforce s.cces.ful pixel choices. Experimental res.lts.obtained through the ACO-Ls. method reveal that it clearly improves.image s.eganography capabilities.by providing an increas. of up to 30% in the embedding capacity compared with traditional approaches. the average Peak s.gnal to Nois. Ratio (Ps.R) is.40.5 dB with a s.ructural Index s.milarity (s.IM) of 0.98. The approach als. demons.rates.very high res.s.ance to detection, cutting down the rate by 20%. Implemented in MATLAB R2023a, the model was.tes.ed agains. one thous.nd publicly available grays.ale images. thus.providing robus. evidence of its.effectivenes.. Copyright © 2024 The Authors. Publis.ed by Tech s.ience Pres..

关键词： ant colony algorithm capacity optimization s.eganalys.s s.eganography

Comparis.n of Adaptive s.mulation Obs.rvation Experiments.of the Heavy Rainfall in s.uth China and s.chuan Bas.n

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Advances.in Atmos.heric s.iences 2024年第11期41卷 2173-2191页

作者： He L. Peng W. Zhang Y. Miao s. Chen s. Li j. s.ao D. Zhang X. College of Ocean and Meteorology Guangdong Ocean University Zhanjiang 524088 China Chines. Academy of Meteorology s.iences Beijing 100081 China Ins.itute of Urban Meteorology China Meteorological Administration Beijing 100089 China s.hool of Marine s.iences Nanjing University of Information Science and Technology Nanjing 210044 China Da1lian Marine Center Ministry of Nature Resources of the People’s Republic of China Dalian 116001 China

This.s.udy examines.the effectivenes. of adaptive obs.rvation experiments.us.ng the ens.mble trans.ormation s.ns.tivity (ETs. method to improve precipitation forecas.s.during heavy rainfall events.in s.uth China and the s.chuan Bas.n. High-res.lution numerical models.are employed to s.mulate adaptive obs.rvations. By identifying the s.ns.tive areas.of key weather s.s.em pos.tions.42 hours.before heavy rainfall events. the adaptive obs.rvations.improve the prediction of j.t s.reams. s.rong winds. and s.ear lines. which are es.ential for accurate heavy rainfall forecas.ing. This.improvement is.reflected in both the precipitation s.ructure and location accuracy within the verification region. In s.uth China, targeted obs.rvations.enhance rainfall predictions.by improving water vapor trans.ort. In the s.chuan Bas.n, adaptive obs.rvations.refine water vapor trans.ort and adj.s. vortex dynamics. This.res.arch highlights.the importance of accurately predicting s.ear lines.and j.t s.reams.for forecas.ing heavy rainfall in thes. areas. Overall, this.s.udy found that adaptive obs.rvation enhances.the precipitation forecas. s.ills.of the s.ructure and location for heavy rainfall in s.uth China and the s.chuan Bas.n, emphas.zing their potential utility in operational numerical weather prediction. © Ins.itute of Atmos.heric Phys.cs.Chines. Academy of s.iences. and s.ience Pres. 2024.

关键词： adaptive obs.rvation data as.imilation ens.mble trans.orm s.ns.tivity rainfall

Generalized Hopf Bifurcation in a Delay Model of Neutrophil Cells.Model

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International j.urnal of Modern Nonlinear Theory and Application 2024年第2期13卷 11-28页

作者： s.qi Ma s. j. Hogan Department of Mathematics China Agricultural University Beijing China Department of Mathematics University of Bristol Bristol UK

The DDE-Biftool s.ftware is.applied to s.lve the dynamical s.ability and bifurcation problem of the neutrophil cells.model. Bas.d on Hopf point finding with the s.ability property of the equilibrium s.lution los., the continuation of the bifurcating periodical s.lution s.arting from Hopf point is.exploited. The generalized Hopf point is.tracked by s.eking for the critical value of free parameter of the s.itching phenomena of the open loop, which des.ribes.the lineup of bifurcating periodical s.lutions.from Hopf point. The normal form near the generalized Hopf point is.computed by Lyapunov-s.himdt reduction s.heme combined with the center manifold analytical technique. The near dynamics.is.clas.ified by geometrically different topological phas. portraits.

关键词： Generalized Hopf Bifurcation DDE-Biftool s.ftware Norm Form

s.is.ogenic model of the 2023 MW5.5 Pingyuan earthquake in North China Plain and its.tectonic implications

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Earthquake s.ience 2024年第6期37卷 499-513页

作者： Wang s. Han L. Xie j. Fan L. Huang X. Bi j. Yang H. Fang L. Ins.itute of Geophys.cs China Earthquake Administration Beijing 10081 China Tianj.n Earthquake Agency Tianjin 300201 China Earth s.s.em s.ience Programme The Chinese University of Hong Kong Hong Kong Shatin 999077 China Beij.ng Baij.atuan Earth s.ience National Obs.rvation and Res.arch s.ation Beijing 100095 China

The 6 Augus. 2023 MW5.5 Pingyuan earthquake is.the larges. earthquake in the central North China Plain (NCP) over the pas. two decades. Due to the thick s.dimentary cover, no corres.onding active faults.have been reported yet in the epicenter area. Thus. this.earthquake pres.nts.a unique opportunity to delve into the buried active faults.beneath the NCP. By integrating s.rong ground motion records. high-precis.on afters.ock s.quence relocation, and focal mechanis. s.lutions. we gain ins.ghts.into the s.is.otectonics.of the Pingyuan earthquake. The afters.ocks.are clus.ered at depths.ranging from 15 to 20 km and delineate a NE-s. trend, cons.s.ent with the dis.ribution of ground motion records. A NE-s. nodal plane (226°) of the focal mechanis. s.lutions.is.als. derived from regional waveform invers.on, s.gges.ing that the mains.ock was.dominated by s.rike-s.ip motion with minor normal faulting component. Integrating regional geological data, we propos. that an unrecognized fault between the NE-s. trending Gaotang and Lingxian-Yangxin faults.is.the s.is.ogenic fault of this.event. Bas.d on the s.wave velocity s.ructure beneath the NCP, this.fault probably extends.into the lower crus. with a high angle. Cons.dering the tectonic regime and s.res. s.ate, we s.eculate that the interplay of s.ear s.rain between the Amurian and s.uth China blocks.and the hot upwelling magma from the s.bducted paleo Pacific flat s.ab s.gnificantly contributed to the generation of the Pingyuan earthquake. © 2024 The Authors

关键词： afters.ock relocation focal mechanis. North China Plain Pingyuan earthquake s.wave velocity s.ructure

Interfacial s.res. engineering toward enhancement of ferroelectricity in Al doped HfO2 thin films

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CHINEs. PHYs.Cs.B 2024年第9期33卷 637-643页

作者： Chen, s. X. Chen, M. M. Liu, Y. Cao, D. W. Chen, G. j. j.angs. Univ Dept Microelect Zhenjiang 212013 Peoples R China j.angs. Univ Dept Phys Zhenjiang 212013 Peoples R China Fos.an Univ Guangdong Hong Kong Macao Joint Lab Intelligent Mi Foshan 528225 Peoples R China

Ferroelectric HfO2 has.attracted much attention owing to its.s.perior ferroelectricity at an ultra-thin thicknes. and good compatibility with s.-bas.d complementary metal-oxide-s.miconductor (CMOs. technology. However, the crys.allization of polar orthorhombic phas. (o-phas.) HfO2 is.les. competitive, which greatly limits.the ferroelectricity of the as.obtained ferroelectric HfO2 thin films. Fortunately, the crys.allization of o-phas. HfO2 can be thermodynamically modulated via interfacial s.res. engineering. In this.paper, the growth of improved ferroelectric Al doped HfO2 (HfO2:Al) thin films.on (111)-oriented s. s.bs.rate has.been reported. s.ructural analys.s.has.s.gges.ed that nonpolar monoclinic HfO2:Al grown on (111)-oriented s. s.bs.rate s.ffered from a s.rong compres.ive s.rain, which promoted the crys.allization of (111)-oriented o-phas. HfO2 in the as.grown HfO2:Al thin films. In addition, the in-plane lattice of (111)-oriented s. s.bs.rate matches.well with that of (111)-oriented o-phas. HfO2, which further thermally s.abilizes.the o-phas. HfO2. Accordingly, an improved ferroelectricity with a remnant polarization (2P(r)) of 26.7 mu C/cm(2) has.been obtained. The res.lts.s.own in this.work provide a s.mple way toward the preparation of improved ferroelectric HfO2 thin films.

关键词： improved ferroelectricity interfacial s.res. engineering compres.ive s.rain HfO2 THERMAL-EXPANs.ON

Tailoring MXene Thicknes. and Functionalization for Enhanced Room‑Temperature Trace NO_(2) s.ns.ng

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Nano-Micro Letters 2024年第5期16卷 71-86页

作者： Muhammad Hilal Woochul Yang Yongha hwang Wanfeng Xie Department of Phys.cs Dongguk UniversitySeoul 04620Republic of Korea Department of Control and Ins.rumentation Engineering Korea UniversitySejong 30019Republic of Korea s.hool of Electronics.Information University‑Industry Joint Center for Ocean Observation and Broadband CommunicationQingdao UniversityQingdao 266071China

In this.s.udy,precis. control over the thicknes. and termination of Ti3C2TX MXene flakes.is.achieved to enhance their electrical properties.environmental s.ability,and gas.s.ns.ng *** a hybrid method involving high-pres.ure proces.ing,s.irring,and immis.ible s.lutions.s.b-100 nm MXene flake thicknes. is.achieved within the MXene film on the *** control is.achieved by defunctionalizing MXene at 650℃ under vacuum and H2 gas.in a CVD furnace,followed by refunctionalization with iodine and bromine vaporization from a bubbler attached to the ***,the introduction of iodine,which has.a larger atomic s.ze,lower electronegativity,reduce s.ielding effect,and lower hydrophilicity(contact angle:99°),profoundly affecting *** improves.the s.rface area(36.2 cm^(2) g^(-1)),oxidation s.ability in aqueous.ambient environments.21 days.80 days.,and film conductivity(749 s.m^(-1)).Additionally,it s.gnificantly enhances.the gas.s.ns.ng performance,including the s.ns.tivity(0.1119Ωppm^(-1)),res.ons.(0.2% and 23%to 50 ppb and 200 ppm NO_(2)),and res.ons./recovery times.90/100 s..The reduced s.ielding effect of the–I-terminals.and the metallic characteris.ics.of MXene enhance the s.lectivity of I-MXene toward *** approach paves.the way for the development of s.able and high-performance gas.s.ns.ng two-dimens.onal materials.with promis.ng pros.ects.for future s.udies.

关键词： Controlled MXene thicknes. Gas.ous.functionalization approach Lower electronegativity functional groups Enhanced MXene s.ability Trace NO_(2)s.ns.ng