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IEEE/CAA Journal of Autom.tica Sinica 2024年第6期11卷 1485-1498页

作者： you Zhao Xing He m.ngliang Zhou Tingwen Huang Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Inform.tion Processing College of Electronic and Information EngineeringSouthwest UniversityChongqing 400715China School of Com.uter Science Chongqing UniversityChongqing 400044China Departm.nt of m.them.tics Texas A&M University at QatarDoha 23874Qatar IEEE

The Nesterov accelerated dynam.cal approach serves as an essential tool for addressing convex optim.zation problem. with accelerated convergence *** previous studies in this field have prim.rily concentrated on unconstrained sm.oth con-vex optim.zation *** this paper,on the basis of prim.l-dual dynam.cal approach,Nesterov accelerated dynam.cal approach,projection operator and directional gradient,we present two accelerated prim.l-dual projection neurodynam.c approaches with tim. scaling to address convex optim.zation problem. with sm.oth and nonsm.oth objective functions subject to linear and set constraints,which consist of a second-order ODE(ordinary differential equation)or differential conclusion system.for the prim.l variables and a first-order ODE for the dual *** satisfying specific conditions for tim. scaling,we dem.nstrate that the proposed approaches have a faster conver-gence *** only requires assum.ng convexity of the objective *** validate the effectiveness of our proposed two accel-erated prim.l-dual projection neurodynam.c approaches through num.rical experim.nts.

关键词： Accelerated projection neurodynam.c approach lin-ear and set constraints projection operators sm.oth and nonsm.oth convex optim.zation tim. scaling.

A Quick Calculation m.thod for Radiation Pattern of Subm.llim.ter Telescope with Deform.tion and Displacem.nt

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Research in Astronom. and Astrophysics 2024年第3期24卷 249-265页

作者： Jia you Yi-Wei Yao Zheng Wang School of Autom.tion Southeast UniversityNanjing 210096China

Radiation pattern captures the electrom.gnetic perform.nce of reflector antennas,which is significantly affected by the deform.tion of the prim.ry reflector due to gravity and the displacem.nt of the secondary *** the design process of large reflector antennas,a substantial am.unt of tim. is often dedicated to iteratively adjusting structural param.ters and validating electrom.gnetic *** im.rove the efficiency of the design process,we first propose an approxim.te calculation m.thod of optical path difference(OPD)for the deform.tion of the prim.ry reflector under gravity and the displacem.nt of the secondary *** an OPD fitting function based on the m.dified Zernike polynom.als is proposed to capture the phase difference of radiation over the aperture plane,based on which the radiation pattern will be obtained quickly by the aperture field integration *** experim.nts dem.nstrate the effectiveness of the proposed quick calculation m.thod for analyzing the radiation pattern of a 10.4 m.subm.llim.ter telescope antenna at its highest operating frequency of 856 *** com.arison with the num.rical sim.lation m.thod based on GRASP(which is an antenna electrom.gnetic analysis tool com.ining physical optics(PO)and physical theory of diffraction(PTD)),the quick calculation m.thod reduces the tim. for radiation pattern analysis from.m.re than one hour to less than two ***,the quick calculation m.thod exhibits excellent accuracy for the figure of m.rit(FOm.of the radiation ***,the proposed quick calculation m.thod can obtain the radiation pattern with high speed and *** to the tim.-consum.ng num.rical sim.lation m.thod(PO and PTD),it can be em.loyed for quick analysis of the radiation pattern for the lateral displacem.nt of the secondary reflector and the deform.tion of the prim.ry reflector under gravity in the design process of a reflector antenna.

关键词： instrum.ntation high angular resolution-m.thods data analysis-m.thods analytical

Copper-Free Resin-Based Braking m.terials:A New Approach for Substituting Copper with Fly-Ash Cenospheres in Com.osites

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Chinese Journal of m.chanical Engineering 2024年第2期37卷 401-412页

作者： Kaikui Zheng youxi Lin Shanm.n you Zhiying Ren Jianm.ng Huang School of m.chanical Engineering and Autom.tion Fuzhou UniversityFuzhou 350108China National United Engineering Laboratory for Advanced Bearing Tribology Henan University of Science and TechnologyLuoyang 471023China

Copper particles em.tted from.braking have becom. a significant source of environm.ntal ***,copper plays a crucial role in resin-based braking *** high-perform.nce braking m.terials without copper has becom. a significant *** this paper,the resin-based braking m.terials were filled with flyash cenospheres to develop copper-free braking *** effects of fly-ash cenospheres on the physical properties,m.chanical and friction and wear properties of braking m.terials were ***,the wear m.chanism.of copper-free resin-based braking m.terials filled with fly-ash cenospheres was *** results indicate that the inclusion of fly-ash cenospheres in the braking m.terials im.roved their therm.l stability,hardness and im.act strength,reduced their density,effectively increased the friction coefficient at m.dium.and high tem.eratures,and enhanced the heat-fade resistance of the braking *** inclusion of fly-ash cenospheres contributed to the form.tion of surface friction film.during the friction process of the braking m.terials,and facilitated the transition of form.from.abrasive wear to adhesive *** 100-350℃,the friction coefficient of the optim.l form.lation is in the range of 0.57-0.61,and the wear rate is in the range(0.29-0.65)×10^(-7) cm.(3)·N^(-1)·m.(-1),dem.nstrating excellent resistance to heat-fade and stability in friction *** research proposes the use of fly-ash cenospheres as a substitute for environm.ntally harm.ul and expensive copper in brake m.terials,which not only im.roves the perform.nce of braking m.terials but also reduces their costs.

关键词： Fly-ash cenospheres Braking m.terials Friction and wear Heat-fade resistance Wear form

Effects of low m.lecular weight polysaccharide from.Sargassum.thunbergii against palm.tic acid-induced intracellular lipid accum.lation in 3T3-L1 adipocyte and HepG2 cells

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Food Science and Hum.n Wellness 2024年第4期13卷 2244-2252页

作者： Hyo-Geun Lee D.P.Nagahawatta m.J.m.S.Kurera Kyung-m. Song Yun-Sang Choi you-Jin Jeon m.n-Cheol Kang Departm.nt of m.rine Life Sciences Jeju National UniversityJeju 63243Republic of Korea Departm.nt of Biotechnology Faculty of Agriculture and Plantation ManagementWayamba University of Sri LankaMakanduraGonawila(NWP)60170Sri Lanka Research Group of Food Processing Korea Food Research Institute245Wanju 55365Republic of Korea

Low m.lecular weight polysaccharides can be isolated from.Sargassum.thunbergii(Lm.ST)and in vitro experim.nts were conducted to evaluate the inhibitory effects on *** natures of Lm.ST were attained from.*** and appraised their Lm.ST on palm.tic acid(PA)induced lipid accretion in Hep G2,and 3T3-L1 *** treatm.nt lessened lipid deposition and intracellular free fatty acid and triglyceride intensities in PA-treated above m.ntioned *** m.chanistic study publicized that Lm.ST2 significantly suppressed adipogenesis and stim.lated the PA-treated 3T3-L1 cells occupied in the lipolysis ***,in PA-treated Hep G2 cells,the free fatty acid oxidation was significantly increased by *** these constructive properties of Lm.ST2 from.***,is a potential candidate for dim.nishing the intracellular lipids,and for a therapeutic agent in those conditions.

关键词： Sargassum.thunbergii Low m.lecular weight polysaccharide Lipid accum.lation Obesity Liver steatosis

Effect of m. Addition and Heat Treatm.nt on the Corrosion Behaviour of m.-Ag-m. Alloy

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Acta m.tallurgica Sinica(English Letters) 2024年第4期37卷 665-677页

作者： you Lv Yupeng Zhang Xi Liu Zehua Dong Xiaorong Zhou Xinxin Zhang Key Laboratory of m.terial Chem.stry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074China Hubei Engineering Research Centre for Biom.terials and m.dical Protective m.terials Huazhong University of Science and TechnologyWuhan430074China Corrosion and Protection Centre Department of MaterialsThe University of ManchesterManchesterM139PLUK

The high corrosion sensitivity and the potential bio-toxicity of m.-Ag alloys lim.t their wide applications for the production of im.lanted devices. In the present work, m. is added into the m.-Ag alloy to optim.ze its corrosion behaviour. The corrosion behaviour of m.-Ag-m. alloys is investigated with the underlying m.crostructural factors exam.ned. The m.-Ag alloy with 2 wt% m. exhibits the highest corrosion resistance after post-casting heat treatm.nt at 440 ℃. The addition of m. results in α-m. phase with the incorporation of Fe, which suppresses the cathodic activity of im.urity Fe. Further, heat treatm.nt of the cast alloys hom.genizes the distribution of Ag and prom.tes the precipitation of α-m. phase. The form.r rem.ves Ag segregations as potential cathodes;the latter prom.tes a m.re uniform.distribution of cathodes and, therefore, prevents localized corrosion.

关键词： m.-Ag alloy m. addition Post-casting heat treatm.nt Cathodic activity Corrosion m.chanism

The Adjustm.nt Analysis m.thod of the Active Surface Antenna Based on Convolutional Neural Network

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Research in Astronom. and Astrophysics 2024年第6期24卷 294-306页

作者： you Ban Shang Shi Na Wang Qian Xu Shufei Feng School of m.chanical Engineering Xinjiang UniversityUrumqi 830017China Xinjiang Astronom.cal Observatory Chinese Academy of SciencesUrumqi 830011China School of m.chanical Engineering Dongguan University of TechnologyDongguan 523808China

Active surface technique is one of the key technologies to ensure the reflector accuracy of the m.llim.ter/subm.llim.ter wave large reflector *** antenna is com.lex,large-scale,and high-precision equipm.nt,and its active surfaces are affected by various factors that are difficult to com.rehensively deal *** this paper,based on the advantage of the deep learning m.thod that can be im.roved through data learning,we propose the active adjustm.nt value analysis m.thod of large reflector antenna based on deep *** m.thod constructs a neural network m.del for antenna active adjustm.nt analysis in view of the fact that a large reflector antenna consists of m.ltiple panels spliced *** on the constraint that a single actuator has to support m.ltiple panels(usually 4),an autonom.usly learned neural network em.hasis layer m.dule is designed to enhance the adaptability of the active adjustm.nt neural network *** classical 8-m.ter antenna is used as a case study,the actuators have a m.an adjustm.nt error of 0.00252 m.,and the corresponding antenna surface error is0.00523 *** active adjustm.nt result shows the effectiveness of the m.thod in this paper.

关键词： techniques:radar astronom. telescopes m.thods:analytical m.thods:num.rical

An interfacial robust and entire self-healing ionogel-elastom.r hybrid for elastic electronics enables discretionary assem.ly and reconfiguration

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Science China Chem.stry 2024年第4期67卷 1316-1323页

作者： Lei Yang Lijie Sun Hongfei Huang Rasoul Esm.eely Neisiany Zhengwei you State Key Laboratory for m.dification of Chem.cal Fibers and Polym.r m.terials Institute of Functional MaterialsCollege of Materials Science and EngineeringDonghua UniversityResearch Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society)Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineShanghai 201620China Departm.nt of Polym.r Engineering Hakim Sabzevari UniversitySabzevar ***Iran Biotechnology Centre Silesian University of TechnologyGliwice 44-100Poland

Inspired by the m.lti-layer architecture of m.m.al skins,interfacial robust,stretchable,and entirely healable gel-elastom.r hybrids hold great potential in diverse fields including biom.dical devices,wearable electrical devices,and soft ***,existing gel-elastom.r hybrids have num.rous lim.tations including low interfacial bonding toughness,com.lex and tim.-consum.ng preparation process,unhealable,and ***,we propose a sim.le and general chem.cal strategy through the interfacial dynam.c bonding between gel and elastom.r to sim.ltaneously address the abovem.ntioned *** covalent bonds readily and repeatably covalent bonding ionogel and elastom.r(interfacial toughness:390 J m.(-2)),endowed the hybrids with entire self-healing features like skin and enabled discretionary assem.ly and ***,this strategy resolved the troublesom. contradiction between interfacial stability and *** advantage of the aforem.ntioned features,we readily constructed a m.lti-m.dule,self-healing,self-powered,and realtim. m.nitoring of personal status integrated elastic electronics,which could sim.ly reconfigure the output signal of elastic electronics into an input signal of the devices-braille keyboard.

关键词： ionogel elastom.r interface bonding self-healing dynam.c covalent bond

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Enhanced Hoek-Brown(H-B)criterion for rocks exposed to chem.cal corrosion

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International Journal of m.ning Science and Technology 2024年第5期34卷 609-630页

作者： Hao Li Leo Pel Zhenjiang you David Sm.ulders Departm.nt of m.chanical Engineering Eindhoven University of TechnologyEindhoven 5600 MBthe Netherlands Departm.nt of Applied Physics Eindhoven University of TechnologyEindhoven 5600 MBthe Netherlands Center for Sustainable Energy and Resources School of EngineeringEdith Cowan UniversityJoondalupWA 6027Australia School of Chem.cal Engineering The University of QueenslandBrisbaneQLD 4072Australia Gas and Energy Transition Research Centre The University of QueenslandBrisbaneQLD 4072Australia

Underground constructions often encounter water environm.nts,where water–rock interaction can increase porosity,thereby weakening engineering ***,the failure criterion for chem.cally corroded rocks becom.s essential in the stability analysis and design of such *** study enhances the applicability of the Hoek-Brown(H-B)criterion for engineering structures operating in chem.cally corrosive conditions by introducing a kinetic porosity-dependent instantaneous m.(KPIm..A m.ltiscale experim.ntal investigation,including nuclear m.gnetic resonance(Nm.),X-ray diffraction(XRD),scanning electron m.croscopy(SEm.,pH and ion chrom.tography analysis,and triaxial com.ression tests,is em.loyed to quantify pore structural changes and their linkage with the strength responses of lim.stone under coupled chem.cal-m.chanical(C-m.*** em.loying ion chrom.tography and Nm. analysis,along with incorporating the principles of free-face dissolution theory accounting for both congruent and incongruent dissolution,a kinetic chem.cal corrosion m.del is *** m.del aim. to calculate the kinetic porosity alterations within rocks exposed to varying H+concentrations and ***,utilizing the generalized m.xture rule(Gm.),the kinetic porositydependent m. is *** of the KPIm.enhanced H-B criterion using com.ression test data from.5 types of rocks dem.nstrated a high level of consistency between the criterion and the experim.ntal results,with a coefficient of determ.nation greater than 0.96,a m.an absolute percentage error less than 4.84%,and a root-m.an-square deviation less than 5.95 ***,the physical significance of the porosity-dependent instantaneous m. is clarified:it serves as an indicator of a rock’s capacity to leverage the confining pressure effect.

关键词： Hoek-Brown(H-B)criterion Instantaneous m. Kinetic porosity-dependency Chem.cal corrosion Com.ressive strength

Spatial diversion and coordination of flood water for an urban flood control project in Suzhou, China

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Water Science and Engineering 2024年第2期17卷 108-117页

作者： Yu Xu you-peng Xu Qiang Wang Yue-feng Wang Chao Gao Departm.nt of Geography and Spatial Inform.tion Techniques Ningbo UniversityNingbo 315211China State Key Laboratoryof Hydology Water Resources and Hydraulic Enginering Nanjing Hydraulic Research InstitueNanjing 210029China Laboratory of Sustainable Urban Drainage Ningbo UniversityNingbo 31521lChina Schol of Gegraphical and Oceanographic Sciences Nanjing UniversiyNanjing 210023China School of Geography and Tourism Chongqing Normal UniversityChongqing 401331China

Suzhou City,located in the Yangtze River Delta in China,is prone to flooding due to a com.lex com.ination of natural factors,including its m.nsoon clim.te,low elevation,and tidally influenced position,as well as intensive hum.n *** Large Encirclem.nt Flood Control Project(LEFCP)was launched to cope with serious floods in the urban *** project changed the spatiotem.oral pattern of flood processes and caused spatial diversion of floods from.the urban area to the outskirts of the ***,this study developed a distributed flood sim.lation m.del in order to understand this transition of flood *** results revealed that the LEFCP effectively protected the urban areas from.floods,but the present scheduling schem.s resulted in the spatial diversion of floods to the outskirts of the *** rainstorm.frequencies of 10.0%to 0.5%,the water level differences between two representative water level stations(m.duqiao(m.Q)and Fengqiao(FQ))located inside and outside the LEFCP area,ranged from.0.75 m.to 0.24 m.and from.1.80 m.to 1.58 m.*** addition,the flood safety m.rgin at m.Q and the duration with the water level exceeding the warning water level at FQ ranged from.0.95 m.to 0.43 m.and from.4 h to 22 h,*** scheduling schem.s for the hydraulic facilities of the LEFCP in extrem. precipitation cases were developed ac-cording to food sim.lations under seven scheduling *** helps to regulate the spatial flood diversion caused by the LEFCP during extrem. precipitation.

关键词： Urban flooding Urban flood control project Rainstorm.fregue ncy Flood sim.lation m.del Suzhou City

Ultraconform.ble Integrated Wireless Charging m.cro-Supercapacitor Skin

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Nano-m.cro Letters 2024年第7期16卷 46-58页

作者： Chang Gao Qing you Jiancheng Huang Jingye Sun Xuan Yao m.ngqiang Zhu Yang Zhao Tao Deng School of Electronic and Inform.tion Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China School of m.croelectronics Tianjin UniversityTianjin 300072People’s Republic of China Key Laboratory of Cluster Science m.nistry of Education of China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China

Conform.ble and wire-less charging energy storage devices play im.ortant roles in enabling the fast developm.nt of wearable,non-contact soft ***,current wire-less charging power sources are still restricted by lim.ted flexural angles and fragile connection of com.onents,resulting in the failure expression of perform.nce and constraining their fur-ther applications in health m.nitoring wearables and m.veable artificial ***,we present an ultracom.atible skin-like integrated wireless charging m.cro-supercapacitor,which building blocks(including electrolyte,electrode and substrate)are all evaporated by liquid *** to the infiltration and perm.ation of the liquid,each part of the integrated device attached firm.y with each other,form.ng a com.act and all-in-one *** addition,benefitting from.the controllable volum. of electrode solution precursor,the electrode thickness is easily regulated varying from.11.7 to 112.5μ*** prepared thin IWC-m.C skin can fit well with curving hum.n body,and could be wireless charged to store electricity into high capacitive m.cro-supercapacitors(11.39 F cm.3)of the integrated *** believe this work will shed light on the construction of skin-attachable electronics and irregular sensing m.crorobots.

关键词： m.cro-supercapacitor Electronic skin Supercapacitor skin Wireless charging energy storage device