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New developments for vacuum coating of steel strips

Baosteel Technical Research 2010年第S1期4卷 40-页

作者： Christoph METZNER Bert SCHEFFEL Jens Peter HEINSS Henry MORGNER Frank HAENDEL Fraunhofer institute for Electron Beam and Plasma Technology(FEP) Winterbergstrasse 28 D-01277 DresdenGermany

Vapor deposited coatings onto strip steel are a promising alternative as functional layers for corrosion protection or high abrasion *** coating systems have some limits regarding environmental compatibility,the range of coating materials and application properties. Physical vapor deposition(PVD) is an environment-friendly technology and enables nearly unlimited material and process *** beam high-rate evaporation with deposition rates up to some micrometers per second is the most productive PVD technology for low cost *** combination of evaporation with powerful plasma is an efficient way to improve the layer *** developed plasma sources can be used for special plasma enhanced chemical vapor deposition(PECVD) processes too. The paper gives an overview about the latest developments in these ***,the paper explains some examples of new layer stacks onto steel *** enhanced corrosion protection can be obtained by magnesium,aluminium or copper containing coatings other functional surface properties come more and more in the focus of *** instance,decorative gold colored layers,transparent scratch resistant layers,hard coatings and photo catalytic layers were deposited on running steel *** layers and layer systems for energy saving and sun energy absorption by solar thermal effects and photo voltaics are under *** coatings are prepared under the conditions of very high deposition rates using our in-line vacuum coater for metallic strips and sheets with the name *** influence of the process and plasma parameters on the layer properties were investigated and will be demonstrated for some applications.

关键词： surface technology steel strip vacuum coating PVD plasma activated electron beam evaporation PECVD corrosion protection decorative coatings

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A Study on the Application Analysis of the Railway System of Tap-Changing Transformer

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Journal of Energy and Power Engineering 2021年第5期15卷 169-176页

作者： Jong-young Park Chang-Mu Lee Hanmin Lee Moon-Seob Han Korea Railroad Research institute Cheoldobangmulgwan-ro Uiwang-siGyeonggi-do 437-757Korea

In this paper,a new type of automatic transmitter(AT)is proposed to properly adjust the voltage of the train without installing additional *** proposed tap-changing AT is expected to raise the voltage between catenary and rail by regulating the turn-ratio between primary and secondary winding according to catenary voltage and verified its effects through the multi ports network analysis technique modeling of *** the simulation and analysis of the electric railway systems,it is shown that it can secure the load capacity and solve the large voltage drop problem by raising the voltage across railway vehicles back to the normal voltage level.

关键词： Railway voltage drop tap-changing AT power compensation

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ter Multiplicative Decomposition Applied to Thermoelastic Geometrically-Exact Rods Dedicated to Professor Karl Stark Pister for his 95th birthday

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Computer modeling in Engineering & Sciences 2021年第12期 1395-1417页

作者： Alexander Humer Hans Irschik institute of Technical Mechanics Johannes Kepler UniversityAltenberger Str.694040 LinzAustria

This paper addresses the application of the continuum mechanics-based multiplicative decomposition for thermohyperelastic materials by Lu and Pister to Reissner’s structural mechanics-based,geometrically exact theory for finite strain plane deformations of beams,which represents a geometrically consistent non-linear extension of the linear shear-deformable Timoshenko beam ***,the Lu-Pister multiplicative decomposition of the displacement gradient tensor is reviewed in a three-dimensional setting,and the importance of its main consequence is emphasized,i.e.,the fact that isothermal experiments conducted over a range of constant reference temperatures are sufficient to identify constitutive material parameters in the stress-strain *** address various isothermal stress-strain relations for isotropic hyperelastic materials and their extensions to *** particular,a model belonging to what is referred to as Simo-Pister class of material laws is used as an example to demonstrate the proposed procedure to extend isothermal stress-strain relations for isotropic hyperelastic materials to thermoelasticity.A certain drawback of Reissner’s structural-mechanics based theory in its original form is that constitutive relations are to be stipulated at the one-dimensional level,between stress resultants and generalized strains,so that the standardized small-scale material testing at the stress-strain level is not at *** order to overcome this,we use a stress-strain based extension of the Reissner theory proposed by Gerstmayr and Irschik for the isothermal case,which we utilize here in the framework of the considered thermoelastic extension of the Simo-Pister stressstrain *** with the latter extension,we derive non-linear thermo-hyperelastic constitutive relations between stress-resultants and general *** emphasis is given to linearizations and their consequences.A numerical example demonstrates the efficacy of the struct

关键词： Thermoelasticity constitutive modeling multiplicative decomposition geometrically exact beam theory

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Particle Filter based Neural Network modeling of Nonlinear systems for State Space Estimation

Particle Filter based Neural Network Modeling of Nonlinear S...

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2009中国控制与决策会议

作者： M.V Rajesh Archana R A Unnikrishnan R Gopikakaumari Govt.Model Engineering College Thrikkakara(PO)CochinKeralaIndia-682 021 Federal institute of Science & Technology MookkannurAngamaliKeralaIndia Naval Physical & Oceanographic Laboratory (DRDO-Govt.of India)CochinKeralaIndia-682021 Cochin University of Science & Technology CUSAT(PO)KeralaIndia-682022

＜正＞The system identification/modeling problem looks for a suitably parameterized model,representing a given *** parameters of the model are adjusted to optimize a performance function based on error between the given process output and identified process *** linear system identification field is well established with many classical approaches whereas most of those methods cannot be applied for nonlinear *** problem becomes tougher if the system is completely unknown with only the output time series is *** has been reported that the capability of Artificial Neural Network to approximate all linear and nonlinear input-output maps makes it predominantly suitable for the identification of nonlinear systems,where only the output time series is available.[1][2][4][5].The work reported here is an attempt of modeling certain nonlinear systems using recurrent neural networks with Extended Kalman Filtering（EKF） and Particle Filtering（PF） approaches[19].An assessment on the model performances in the mean square error（MSE） sense has also been done for both.

关键词： EKF MSE Particle Filter State Space modeling RNN,Monte Carlo Integration SIR

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Application of Thermodynamic and Kinetic modeling to Diffusion Simulations in Nickel-Base Superalloy systems

Application of Thermodynamic and Kinetic Modeling to Diffusi...

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第十四届全国相图会议暨国际相图与材料设计研讨会

作者： Anders Engstrm Lars Hglund Henrik Larsson Paul Mason Thermo-Calc Software AB Stockholm Technology ParkSE-113 47 StockholmSweden Division of Physical Metallurgy Department of Materials Science and EngineeringThe Royal Institute of Technology (KTH)SE-100 44 StockholmSweden Thermo-Calc Software Inc. 4160 Washington RoadMcMurray PA 15317USA

＜正＞This paper presents a brief review and some new results on simulation of interdiffusion in Ni-base superalloy diffusion couples,by means of a thermodynamic and kinetic modelling approach as taken in a commercial finite-difference code,*** code solves the multi-component diffusion equations,combining assessed thermodynamic and kinetic data in order to determine the full

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Preface

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Science China(Technological Sciences) 2014年第4期57卷 651-651页

作者： DING Yong ZHANG Yuan WANG Xiang YAN XiaoLang KRYLOV Andrey S. institute of VLSI Design Zhejiang University Laboratory of Mathematical Methods of Image Processing Lomonosov Moscow State University

A good objective metric of image quality assessment(IQA)should be consistent with the subjective judgment of human *** this paper,a four-stage perceptual approach for full reference IQA is *** the first stage,the visual features are extracted by 2-D Gabor filter that has the excellent performance of modeling the receptive fields of simple cells in the primary visual *** in the second stage,the extracted features are post-processed by the divisive normalization transform to reflect the nonlinear mechanisms in human visual *** the third stage,mutual information between the visual features of the reference and distorted images is employed to measure the visual *** in the last pooling stage,the mutual information is converted to the final objective quality *** results show that the proposed metic has a high correlation with the subjective assessment and outperforms other state-of-the-art metrics.

关键词：纳米尺度机械性能散装材料可靠性问题热响应性非晶材料晶体材料微米级

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Engineering Review Food Extrusion Technology and Its Applications

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Journal of Food Science and Engineering 2016年第3期6卷 149-168页

作者： Kehinde Adedeji Adekola institute of Agricultural Products Processing and Storage College of Biological and Agricultural Engineering Jilin UniversityChangchun 130022 China

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Controlled mechanical assembly of complex 3D mesostructures and strain sensors by tensile buckling

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npj Flexible Electronics 2018年第1期2卷 120-126页

作者： Xiaogang Guo Xueju Wang Dapeng Ou Jilong Ye Wenbo Pang Yonggang Huang John A.Rogers Yihui Zhang Department of Engineering Mechanics Center for Mechanics and Materials and Center for Flexible Electronics TechnologyAMLTsinghua University100084 BeijingPeople’s Republic of China Department of materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA State Key Laboratory of Tribology Tsinghua University100084 Beijing People’s Republic of China Center for Nano and Micro Mechanics Tsinghua University100084 Beijing People’s Republic of China Departments of Civil and Environmental Engineering Mechanical Engineeringand Materials Science and EngineeringNorthwestern UniversityEvanstonIL 60208USA Departments of materials Science and Engineering Biomedical EngineeringNeurological SurgeryChemistryMechanical EngineeringElectrical Engineering and Computer ScienceCenter for Bio-Integrated ElectronicsSimpson Querrey Institute for BioNanotechnologyNorthwestern UniversityEvanstonIL 60208USA

Recent research establishes methods of controlled mechanical assembly as versatile routes to three-dimensional(3D)mesostructures from patterned 2D films,with demonstrated applicability to a broad range of materials(e.g.,semiconductors,polymers,metals,and their combinations)and length scales(e.g.,from sub-microscale to centimeter scale).Previously reported schemes use pre-stretched elastomeric substrates as assembly platforms to induce compressive buckling of 2D precursor structures,thereby enabling their controlled transformation into 3D ***,we introduce tensile buckling as a different,complementary strategy that bypasses the need for a pre-stretched platform,thereby simplifying the assembly process and opening routes to additional classes of 3D geometries unobtainable with compressive buckling.A few basic principles in mechanics serve as guidelines for the design of 2D precursor structures that achieve large out-of-plane motions and associated 3D transformations due to tensile *** and computational studies of nearly 20 examples demonstrate the utility of this approach in the assembly of complex 3D mesostructures with characteristic dimensions from micron to millimeter *** results also establish the use of nonlinear mechanics modeling as a mechanism for designing systems that yield desired 3D geometries.A strain sensor that offers visible readout and large detectable strain range through a collection of mechanically triggered electrical switches and LEDs serves as an application example.

关键词： strain buckling thereby

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Mechanochemistry of an Interlocked Poly[2]catenane:From Single Molecule to Bulk Gel

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CCS Chemistry 2020年第1期2卷 513-523页

作者： Hao Xing Zhandong Li Wenbo Wang Peiren Liu Junkai Liu Yu Song Zi Liang Wu Wenke Zhang Feihe Huang State Key Laboratory of Chemical Engineering Department of ChemistryCenter for Chemistry of High-Performance&Novel MaterialsZhejiang UniversityHangzhou 310027(China) State Key Laboratory of Supramolecular Structure and materials College of ChemistryJilin UniversityChangchun 130012(China) Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027(China) Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced StudyDepartment of Chemical and Biological Engineering and Division of Life ScienceThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong(China)

Mechanically interlocked molecules(MIMs)are prototypical molecular machines with parts that enable controlled,large-amplitude movement with one component positioned relative to *** MIMs into polymeric matrices is promising for the designing of functional materials with unprecedented ***,the central issue is the challenges involved with establishing the mechanistic linkage between the single-molecule and the bulk ***,we explore the mechanochemical properties and energetic details of a linear poly[2]catenane with strong intercomponent hydrogen bonding(IHB)revealed by single-molecule force *** results showed that the individual linear poly[2]catenane chain exhibited typical sawtooth pattern,corresponding to the reversible unlocking and relocking transitions under external force or upon stimulations to dissociate or re-form the strong ***,when a poly[2]catenane-based polymer gel was prepared using a thiol-ene click reaction between thiol-ended poly[2]catenane and a low-molecule-weight cross-linker,the resultant gel showed excellent mechanical adaptability and dynamic properties,which correlated well with the molecular-level *** unique poly[2]catenane structure also contributed to the gel formation with an extraordinary IHB-mediated swelling behavior and shape memory *** our present results demonstrate the functioning of bulk material in a linear tandem manner from the behavior of a single molecule,a finding which should be applicable to other systems with versatile properties and promising applications.

关键词： polycatenane supramolecular polymer mechanochemistry single-molecule force spectroscopy

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Wireless,battery-free,and fully implantable electrical neurostimulation in freely moving rodents

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Microsystems & Nanoengineering 2021年第4期7卷 127-138页

作者： Alex Burton Sang Min Won Arian Kolahi Sohrabi Tucker Stuart Amir Amirhossein Jong Uk Kim Yoonseok Park Andrew Gabros John A.Rogers Flavia Vitale Andrew G.Richardson Philipp Gutruf Department of Biomedical Engineering University of ArizonaTucsonAZ 85721USA Department of Electrical and Computer Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Department of Neurosurgery Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA 19104USA Querrey Simpson institute for Bioelectronics Northwestern UniversityEvanstonIL 60208USA Center for Bio-Integrated Electronics Northwestern UniversityEvanstonIL 60208USA Department of Mechanical Engineering Northwestern UniversityEvanstonIL 60208USA Department of Biomedical Engineering Northwestern UniversityEvanstonIL 60208USA Department of materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA Department of Neurological Surgery Feinberg School of MedicineNorthwestern UniversityChicagoIL 60611USA Department of Neurology BioengineeringPhysical Medicine&RehabilitationCenter for Neuroengineering and TherapeuticsUniversity of PennsylvaniaPhiladelphiaPA 19104USA Bio5 institute and Neuroscience GIPP University of ArizonaTucsonAZ 85721USA Department of Electrical and Computer Engineering University of ArizonaTucsonAZ 85721USA

Implantable deep brain stimulation(DBS)systems are utilized for clinical treatment of diseases such as Parkinson's disease and chronic ***,long-term efficacy of DBS is limited,and chronic neuroplastic changes and associated therapeutic mechanisms are not well *** and mechanistic investigation,typically accomplished in small animal models,is difficult because of the need for chronic stimulators that currently require either frequent handling of test subjects to charge battery-powered systems or specialized setups to manage tethers that restrict experimental paradigms and compromise *** overcome these challenges,we demonstrate a fully implantable,wireless,battery-free platform that allows for chronic DBS in rodents with the capability to control stimulation parameters digitally in real *** devices are able to provide stimulation over a wide range of frequencies with biphasic pulses and constant voltage control via low-impedance,surface-engineered platinum *** devices utilize off-the-shelf components and feature the ability to customize electrodes to enable broad utility and rapid *** of the system is demonstrated with a readout of stimulation-evoked neural activity in vivo and chronic stimulation of the medial forebrain bundle in freely moving rats to evoke characteristic head motion for over 36 days.

关键词： stimulation battery moving

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