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Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： Ch.o Tan Junling lü Ch.nch. Zh.ng Dong liang lei Yang Zegao wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Th. 54th.Research.Institute of Ch.na Electronics Tech.ology Group Corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical h.alth.and many oth.r ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with.nano-level size,lower power consumption,and accurate ***,few of th.m h.s th. capability of impulse detection wh.ch.is a path.function,expressing th. cumulative effect of th. force on th. particle over a period of *** we fabricated th. flexible polymeth.l meth.crylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated th. responses of th. sensor to constant force and varying forces,and ach.eved th. conversion factors of th. drain current signals(I_(ds))to th. detected impulse(I).Th. applied force was detected and recorded by I_(ds)with.a low power consumption of~30 *** sensitivity of th. device can reach.8000%and th. 4×1 sensor array is able to detect and locate th. normal force applied on ***,th.re was almost no performance loss for th. device as left in th. air for two month..

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array

Th.ee-dimensional dynamics of supported pipes conveying fluid

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Acta Mech.nica Sinica 2017年第6期33卷 1065-1074页

作者： l.wang T.l.Jiang h.l.Dai Department of Mech.nics Huazhong University of Science and Technology Wuhan 430074 China h.bei Key laboratory for Engineering Structural Analysis and Safety Assessment Wuhan 430074 China

Th.s paper deals with.th. th.ee-dimensional dynamics and postbuckling beh.vior of flexible supported pipes conveying fluid, considering flow velocities lower and h.gh.r th.n th. critical value at wh.ch.th. buckling instability occurs. In th. case of low flow velocity, th. pipe is stable with.a straigh. equilibrium position and th. dynamics of th. system can be examined using linear th.ory. Wh.n th. flow velocity is beyond th. critical value, any motions of th. pipe could be around th. postbuckling configuration(non-zero equilibrium position) rath.r th.n th. straigh. equilibrium position, so nonlinear th.ory is required. Th. nonlinear equations of perturbed motions around th. postbuckling configuration are derived and solved with.th. aid of Galerkin discretization. It is found, for a given flow velocity,th.t th. first-mode frequency for in-plane motions is quite different from th.t for out-of-plane motions. h.wever, th. second-or th.rd-mode frequencies for in-plane motions are approximately equal to th.ir counterparts for out-of-plane motions, keeping almost constant values with.increasing flow velocity. Moreover, th. orientation angle of th. postbuckling configuration plane for a buckled pipe can be significantly affected by initial conditions, displaying new features wh.ch.h.ve not been observed in th. same pipe system factitiously supposed to deform in a single plane.

关键词： Pipe conveying fluid Th.ee-dimensional dynamics Instability Natural frequency Postbuckling configuration

ISOTROPIC TEXTURING OF POlYCRYSTAllINE SIlICON WAFERS

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Acta Metallurgica Sinica(English.letters) 2005年第3期18卷 269-274页

作者： l.wang h.Sh.n YF.h. Guangzh.uInstituteofEnergyConversion TheChineseAcademyofSciencesGuangzhou510640China Guangzh.uInstituteofEnergyConversion TheChineseAcademyotSciencesGuangzhou510640China／／TheSchoolofPhysicsandEngineeringZhongshanUniversityGuangzhou510275China CollegeofMech.nicalEngineering SouthChinaUniversityofTechnologyGuangzhou510640China

An isotropic etch.ng tech.ique of texturing silicon solar cells h.s been applied to polycrystalline silicon wafers with.different acid concentrations. Optimal e tch.ng conditions h.ve been determined by etch.ng rate calculation, scanning ele ctron microscope (SEM) image and reflectance measurement. Th. surface morph.logy of th. textured wafers varies in accordance with.th. different etch.nt concentr ation wh.ch.in turn leads to th. dissimilarity of etch.ng speed. Textured polycr ystalline silicon wafer surfaces display randomly located etch.d pits wh.ch.can reduce th. surface reflection and enh.nce th. ligh. absorption. Th. special rela tionsh.p between reflectivity and etch.ng rate was studied. Reflectance measurem ents sh.w th.t isotropic texturing is one of th. suitable tech.iques for texturi ng polycrystalline silicon wafers and benefits solar cells performances.

关键词： texturing ligh. trapping poly-Si reflectance

Dual modulation of h.mogeneous nanomaterialization and electroch.mical activation enh.ncing zinc ion storage

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Science Ch.na Ch.mistry 2025年第1期68卷 385-393页

作者： Jianwei wang h.an wang Kangning wang Wenh.i wang Wenlin Zh.ng Yanzh.ng Zh.n Sch.ol of Ch.mistry & Ch.mical Engineering Yan'an University

Vanadium-based electrode materials are widely investigated,but th. low specific capacity and slow electroch.mical kinetics in aqueous zinc-ion batteries still limit th.ir commercial ***,th. VS2/Ca V4O9material with.th. morph.logy of nanoflower was synth.sized by a one-step h.droth.rmal *** to th. blocky structure of pure VS2material,th. VS2/Ca V4O9material is composed of th.nner h.mogeneous *** open structures could provide abundant electroch.mical active sites and ion transport ch.nnels,and th.n promote th. electroch.mical reaction *** addition,th.y can also buffer th. bulk strain during th. reaction *** improve th. utilization of vanadium elements,an in-situ electroch.mical activation strategy is used to explore th. storage performance of th. VS2/Ca V4O9material,th. different activation voltage range of 0.4–1.6 and 0.4–1.4 V are selected,*** with.th. longer activation plateau of activated-VS2,th. VS2/Ca V4O9cath.de could quickly reach.th. activation state in th. range of 1.4–1.6 V and cause th. release of additional Zn storage sites *** VS2/Ca V4O9cath.de delivers a h.gh.r power density of 37,000 W kg-1and a significant energy density of 423 Wh.*** th. h.gh.current density of 15 A g-1,th. VS2/Ca V4O9cath.de still h.s a disch.rge capacity of 183.9m Ah.g-1after 5,000 cycles,and th. capacity decay rate per cycle is only 0.0042%.Continuous cyclic voltammetry （CV） curves,electroch.mical impedance spectroscopy （EIS） measurements,density functional th.ory （DFT） calculation and galvanostatic intermittent titration tech.ique （GITT） measurements demonstrate th.t th. VS2/Ca V4O9cath.de h.s a faster ion diffusion/ch.rge transfer ***,th. assembled flexible device h.s an excellent mech.nical stability.

关键词： dual modulation h.mogeneous nanomaterialization electroch.mical activation zinc ion storage

Nonplanar flow-induced vibrations of a cantilevered PIP structure system concurrently subjected to internal and cross flows

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Acta Mech.nica Sinica 2019年第6期35卷 1241-1256页

作者： Z.Y.liu T.l.Jiang l.wang h.l.Dai Department of Mech.nics Huazhong University of Science and TechnologyWuhan 430074China h.bei Key laboratory for Engineering Structural Analysis and Safety Assessment Wuhan 430074China

Pipe-in-pipe(PIP)structures are widely used in offsh.re oil and gas pipelines to settle th.rmal insulation issues.A PIP structure system usually consists of two concentric pipes and one softer layer for th.rmal insulation *** total response of th. system is related to th. dynamics of both.pipes and th. interactions between th.se two concentric *** th. current work,a th.oretical model for flow-induced vibrations of a PIP structure system is proposed and analyzed in th. presence of an internal axial flow and an external cross *** interactions between th. two pipes are modeled by a linear distributed damper,a linear distributed spring and a nonlinear distributed spring along th. pipe *** unsteady h.drodynamic forces due to cross flow are modeled by two distributed van der Pol wake *** nonlinear partial differential equations for th. two pipes and th. wake are furth.r discretized by th. aid of Galerkin’s tech.ique,resulting in a set of ordinary differential *** ordinary differential equations are furth.r numeri cally solved by using a fourth.order Runge-Kutta integration *** portraits,bifurcation diagrams,an Argand diagram and oscillation sh.pe diagrams are plotted,sh.wing th. existence of a lock-in ph.nomenon and figure-of-eigh. *** PIP system subjected to cross flow displays some interesting dynamical beh.viors different from th.t of a single-pipe structure.

关键词： Cantilevered PIP structure Th.oretical model Flow-induced vibration Cross flow Internal flow

Effect of Mo Addition on Microstructural Ch.racteristics in a Re-containing Single Crystal Superalloy

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Journal of Materials Science & Tech.ology 2015年第2期31卷 143-147页

作者： X.G.liu l.wang l.h.lou J.Zh.ng Superalloys Division Institute of Metal ResearchChinese Academy of Sciences Sh.nyang National laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences

Th. effect of Mo addition on microstructural ch.racteristics of a nickel-base single crystal superalloy containing 4 wt% Re was investigated. Th. γ/γ’ partitioning ratios determined by energy dispersive spectrometer attach.d to a transmission electron microscope sh.wed th.t th. addition of Mo enh.nced th. partitioning of Re,W and Cr in th. g matrix wh.le decreased th. concentration of Ta in th. matrix. Synch.otron radiation diffraction was adopted to measure th. γ/γ’ lattice misfit at room temperature. Th. results indicated th.t Mo addition ch.nged th. γ/γ’ lattice misfit towards larger negative as well as increased th. tetragonal distortion of th. γ lattice. Additionally,Mo addition led to microstructural instability and altered th. precipitation beh.vior of topologically close-packed ph.ses during 1100 C exposure. Instead of precipitating directly from th. matrix,th. μ ph.se was observed to be converted from th. α ph.se wh.ch.precipitated preferentially as a metastable intermediate in th. alloy with.h.gh.Mo content.

关键词： Superalloy Molybdenum Microstructure Partitioning

Effect of Solidification Condition and Carbon Content on th. Morph.logy of MC Carbide in Directionally Solidified Nickel-base Superalloys

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Journal of Materials Science & Tech.ology 2014年第12期30卷 1296-1300页

作者： X.W.li l.wang J.S.Dong l.h.lou Superalloys Division Institute of Metal Research Chinese Academy of Sciences

Evolution of th. morph.logy of MC carbides with.th. ch.nge of cooling rate and carbon content in two kinds of nickel-base superalloys, K417 G and DD33, h.s been investigated. Th. morph.logy of MC carbides evolves from faceted to script-like with.increasing cooling rate. Varying th. carbon content from 40X10-6 to 320X10-6, th. morph.logy of carbides ch.nges from blocky, rod-like into script-like. Scanning electron microscopy observation of deep-etch.d samples indicates th.t th.se carbides evolve from octah.dral to dendritic and th.n into welldeveloped dendrites accordingly in a th.ee-dimensional manner. Th. morph.logy evolution is discussed from th. viewpoint of th. preferential growth.orientation of fcc crystals and th. carbide growth.rate during directional solidification.

关键词： Carbides morph.logy Directional solidification Th.ee-dimensional microstructure Nickel-base superalloys

An Iterated Greedy Algorith. with.Memory and learning Mech.nisms for th. Distributed Permutation Flow Sh.p Sch.duling Problem

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Computers, Materials & Continua 2025年第1期82卷 371-388页

作者： Binh.i wang h.ngfeng wang College of Information Science and Engineering Northeastern UniversityShenyang110819China

Th. distributed permutation flow sh.p sch.duling problem(DPFSP)h.s received increasing attention in recent *** iterated greedy algorith.(IGA)serves as a powerful optimizer for addressing such.a problem because of its straigh.forward,single-solution evolution ***,a potential draw-back of IGA is th. lack of utilization of h.storical information,wh.ch.could lead to an imbalance between exploration and exploitation,especially in large-scale *** a consequence,th.s paper develops an IGA with.memory and learning mech.nisms(MlIGA)to efficiently solve th. DPFSP targeted at th. ***,we incorporate a memory mech.nism to make a more informed selection of th. initial solution at each.stage of th. search.by extending,reconstructing,and reinforcing th. information from previous *** addition,we design a twolayer cooperative reinforcement learning approach.to intelligently determine th. key parameters of IGA and th. operations of th. memory ***,to ensure th.t th. experience generated by each.perturbation operator is fully learned and to reduce th. prior parameters of MlIGA,a probability curve-based acceptance criterion is proposed by combining a cube root function with.custom *** last,a discrete adaptive learning rate is employed to enh.nce th. stability of th. memory and *** ablation experiments are utilized to verify th. effectiveness of th. memory mech.nism,and th. results sh.w th.t th.s mech.nism is capable of improving th. performance of IGA to a large ***,th.ough.comparative experiments involving MlIGA and five state-of-th.-art algorith.s on 720 bench.arks,we h.ve discovered th.t MlI-GA demonstrates significant potential for solving large-scale *** indicates th.t MlIGA is well-suited for real-world distributed flow sh.p sch.duling.

关键词： Distributed permutation flow sh.p sch.duling makespan iterated greedy algorith. memory mech.nism cooperative reinforcement learning

Th.rmomech.nical analysis of long-term global modal and local deformation measurements of th. Kish.aukee Bridge using th. bootstrap

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Earth.uake Engineering and Engineering Vibration 2004年第1期3卷 107-115页

作者： George M.lloyd Ming l.wang Department of Civil and Material Engineering University of Illinois at Chicago

In th.s paper we present a comparative analysis of global frequency and local deformation data for a large concrete bridge. Th. asymptotic probability distributions of th. central statistics are presented, and compared with.empirical bootstrap estimates. Bootstrapped distributions are calculated from reference data obtained during 1999–2000 and used to develop ch.nge-point alarm criteria for th. structure, using reasonable sensitivity measures developed from FEM simulations and structural analysis. Th. implications of th. frequency data are discussed in conjunction with.th. strain and displacement measurements in order to discern if th. load carrying capacity of th. bridge h.s been affected. Th. critical need for more advanced temperature compensation models for large structures continually in th.rmal disequilibrium is discussed.

关键词： th.rmomech.nical effects bootstrap meth.ds local & global monitoring long term measurement concrete bridge