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Recent progress and perspective in additive manufacturing of EMI shielding functional polymer nanocomposites

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Nano Research 2023年第1期16卷 1-17页

作者： Amirjalal Jalali Ruiyan Zhang Reza Rahmati Mohammadreza Nofar Mohini Sain Chul b.park Center for biocomposites&biomaterials Processing John H.Daniels Faculty of ArchitectureLandscapeand DesignUniversity of TorontoTorontoOntario M5S 3B3Canada Microcellular Plastics Manufacturing Laboratory Department of Mechanical and Industrial EngineeringUniversity of Toronto5 King's College RoadTorontoOntario M5S 3G8Canada State Key Laboratory of high-Efficiency Utilization of Coal and Green Chemical Engineering Key Laboratory of Photovoltaic MaterialsSchool of Materials and New EnergyNingxia UniversityYinchuan 750021China Metallurgical&Materials Engineering Department Faculty of Chemical and Metallurgical EngineeringIstanbul Technical UniversityMaslakIstanbul 34469Turkey

because of rapid progress in the electronics industry,the market has faced a huge demand for novel materials in the field of electromagnetic interference(EMI)*** functional polymer composites have demonstrated great potential to fulfill this *** synthesize the polymeric composites,functional conductive nanoadditives such as graphene,carbon nanotubes,and MXene are commonly added to polymeric matrices,and the conductive polymer nanocomposites exhibit promising electrical conductivity as well as EMI shielding *** manufacturing(AM),also referred to as threedimensional(3D)printing,has been increasingly employed to fabricate complicated geometry components in the medical,aerospace,and automotive *** has also been used to fabricate advanced EMI shielding materials for sensors,supercapacitors,energy storage devices,and flexible *** review aims at introducing the different 3D printing methods applied for the fabrication of EMI shielding polymer *** impact of the AM process on the functionality of the samples is also ***,the influence of the nanofiller type and amount on the microstructure and performance of the fabricated nanocomposites is ***,the prospects and recommended works for future study are outlined.

关键词： additive manufacturing electromagnetic interference(EMI)shielding functional polymer nanocomposites stretchable electronics

Earth return path impedances of underground cable for three-layer earth

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第8期10卷 1191-1198页

作者： b.hEMMATIAN b.VAhIDI S.h.hOSSEINIAN Department of Electrical Engineering Amirkabir University of Technology

One of the factors that affect the parameters of an underground cable is earth return path *** developed a formula for the case of one-layer(homogenous) *** in practice the earth is composed of several *** this study we develop a new formula for earth return path impedance in the case of a three-layer *** check the accuracy of the obtained results,a comparison has been made with the finite element method(FEM).A comparison between the results of the Pollaczek formula and results of the obtained formula for a three-layer earth has been made,showing that the use of the Pollaczek formula instead of the actual formula can cause serious errors.

关键词： Underground cables Earth return path impedance Earth stratification Finite element method (FEM)

Stagnant lids and mantle overturns:Implications for Archaean tectonics, magmagenesis,crustal growth, mantle evolution, and the start of plate tectonics

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Geoscience Frontiers 2018年第1期9卷 19-49页

作者： Jean h.bédard Geological Survey of Canada GSC-Québec

The lower plate is the dominant agent in modern convergent margins characterized by active subduction,as negatively buoyant oceanic lithosphere sinks into the asthenosphere under its own *** is a strong plate-driving force because the slab-pull force is transmitted through the stiff sub-oceanic lithospheric *** geological and geochemical data seem inconsistent with the existence of modernstyle ridges and arcs in the Archaean,a periodically-destabilized stagnant-lid crust system is proposed ***-lid intervals may correspond to periods of layered mantle convection where efficient cooling was restricted to the upper mantle,perturbing Earth's heat generation/loss balance,eventually triggering mantle *** basalts were derived from fertile mantle in overturn upwelling zones(OUZOs),which were larger and longer-lived than post-Archaean *** cratons/continents probably formed above OUZOs as large volumes of basalt and komatiite were delivered for protracted periods,allowing basal crustal cannibalism,garnetiferous crustal restite delamination,and coupled development of continental crust and sub-continental lithospheric *** mixing and rehomogenization during overturns retarded development of isotopically depleted MORb(mid-ocean ridge basalt)*** after the start of true subduction did sequestration of subducted slabs at the coremantle boundary lead to the development of the depleted MORb mantle *** Archaean mantle overturns,pre-existing continents located above OUZOs would be strongly reworked;whereas OUZOdistal continents would drift in response to mantle *** leading edge of drifting Archaean continents would be convergent margins characterized by terrane accretion,imbrication,subcretion and anatexis of unsubductable oceanic *** Earth cooled and the background oceanic lithosphere became denser and stiffer,there would be an increasing probability that oceanic crustal segments could

关键词： Archaean Mantle-overturn Stagnant-lid Continental crust Oceanic crust Subcretion

SYNThESIS, ChARACTERIZATION AND SPECTROSCOPIC INVESTIGATION OF PYRAZINOPORPhYRAZINE NETWORK POLYMER-SUPPORTED METAL (Ⅱ)-bASED CATALYSTS

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Chinese Journal of Polymer Science 2013年第2期31卷 242-250页

作者： h.h. Abdel-Razik b.h. Asghar E. Kenawy Chemistry Department Faculty of Science Mansoura University Chemistry Department Faculty of Science Taif University Chemistry Department Faculty of Applied Sciences Umm Al-Qura University Chemistry Department Polymer Research Group Faculty of Science Tanta University

Chloranil through condensation reaction with vicinal diamine such as diaminomaleonitrile produced heterocyclic monomer, p-benzoquinonebis[2,3-b; 2＇,3＇-b＇]pyrazine-5,6-dinitrile. The tetranitrile monomer was cyclo-tetramerised using lithium/pentanol and acetic acid affording the corresponding tetrap-benzoquinone bis[2,3-b; 2＇,3＇-b＇]pyrazinoporphyrazine）]- based network polymer （2h-Pz）. The tetranitril monomer was cyclo-tetramerised using metal salt and quinoline affording the corresponding porphyrazinato-metal II-based network polymers （M-Pz）, M = Co, Ni or Cu. Elemental analytical results, IR and NMR spectral data of the prepared molecules are consistent with their assigned formulations. Molecular masses and metal contents of the synthesized polymers proved to be of high molecular masses which confirm the efficiency of tetramerization polymerization and complexation reactions. The prepared pyrazinoporphyrazines were used as efficient catalysts for the oxidation of thiophenol and benzylthiol to their disulfides in the presence of air atmosphere. The results of oxidation of thiophenol and benzylthiol show that after 15 min the maximum yield of the corresponding disulfides reached 95%, 91%, respectively.

关键词： Pyrazinoporphyrazine Polymer-supported metal (II)-based catalysts Chloranil.

hydroclimatological data and analyses from a headwaters region of Mongolia as boundary objects in interdisciplinary climate change research

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Frontiers of Earth Science 2017年第3期11卷 457-468页

作者： N.b.h. VENAbLE ESS-Watershed Science Colorado State University Fort Collins CO 80523-1476 USA

Collaborative work on increasingly complex hydroclimatic investigations often crosses disciplinary boundaries. Elements of scientific inquiry, such as data or the results of analyses can become objectified, or capable of being adopted and/or adapted by users from multiple disciplinary realms. These objects often provide a bridge for collaborative endeavors, or are used as tools by individuals pursuing multi-disciplinary work. boundary object terminology was first formalized and applied by social scientists. however, few examples of the application of this useful framework are found in the hydrologic literature. The construct is applied here to identify and discuss how common researcb products and processes are used both internally and externally through providing examples from a project examining the historical and paleo proxy-based hydroclimatology of a headwaters region of Mongolia. The boundary object concept is valuable to consider when conducting and critiquing basic research, collaborating across multiple disciplinary teams as when studying climate change issues, as an individual researcher working in a cross boundary sense using methods from differing disciplines to answer questions, and/or when one group adapts the work of another to their own research problems or interpretive needs, as occurred with selected products of this project.

关键词： Mongolia boundary objects climate change,hydroclimate

bound state solutions of the Dirac equation with the Deng–Fan potential including a Coulomb tensor interaction

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Chinese Physics b 2014年第3期23卷 123-130页

作者： S.Ortakaya h.hassanabadi b.h.Yazarloo Institute of Natural and Applied Sciences Erciyes University Department of basic Sciences Shahrood Branch Islamic Azad University

Approximate analytical solutions of the Dirac equation in the case of pseudospin and spin symmetry limits are inves- tigated under the Deng-Fan potential by applying the asymptotic iteration method for the arbitrary quantum numbers n and ~~. Some of the numerical results are also represented in both pseudospin symmetry and spin symmetry limits.

关键词： Dirac equation Deng-Fan potential pseudospin and spin symmetries tensor interaction

A Lookahead Read Cache： Improving Read Performance for Deduplication backup Storage

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Journal of Computer Science & Technology 2017年第1期32卷 26-40页

作者： Dongchul park Ziqi Fan Young Jin Nam David h. C. Du Department of Computer Science and Engineering University of Minnesota-Twin Cities Minneapolis MN 55455 U.S.A.

Data deduplication （dedupe for short） is a special data compression technique. It has been widely adopted to save backup time as well as storage space, particularly in backup storage systems. Therefore, most dedupe research has primarily focused on improving dedupe write performance. however, backup storage dedupe read performance is also a crucial problem for storage recovery. This paper designs a new dedupe storage read cache for backup applications that improves read performance by exploiting a special characteristic： the read sequence is the same as the write sequence. Consequently, for better cache utilization, by looking ahead for future references within a moving window, it evicts victims from the cache having the smallest future access. Moreover~ to further improve read cache performance. it maintains a small log buffer to judiciously cache future access data chunks. Extensive experiments with real-world backup workloads demonstrate that the proposed read cache scheme improves read performance by up to 64.3%

关键词： deduplication dedupe read cache backup

Impulsive effect on exponential synchronization of neural networks with leakage delay under sampled-data feedback control

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Chinese Physics b 2014年第7期23卷 218-229页

作者： S.Lakshmanan Ju h.park Fathalla A.Rihan R.Rakkiyappan Department of Mathematical Sciences College of ScienceUAE University Nonlinear Dynamics Group Department of Electrical EngineeringYeungnam University Department of Mathematics Bharathiar University

We consider the impulsive effect on the exponential synchronization of neural networks with leakage delay under the sampled-data feedback control. We use an appropriate Lyapunov-Krasovskii functional combined with the input delay approach and some inequality techniques to derive sufficient conditions that ensure the exponential synchronization of the delayed neural network. The conditions are formulated in terms of the leakage delay, the sampling period, and the exponential convergence rate. Numerical examples are given to demonstrate the usefulness and the effectiveness of the results.

关键词： exponential synchronization impulsive effect leakage delay sampled-data feedback

Relativistic bound and Scattering Amplitude of Spinless Particles in Modified Schioberg Plus Manning–Rosen Potentials

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Communications in Theoretical Physics 2017年第1期67卷 71-75页

作者： b.h.Yazarloo h.Mehraban Physics Department Semnan UniversityP.O.Box 35195-363SemnanIran

by using an approximation for the centrifugal term, we study relativistic bound and scattering states of spin-zero particles in the presence of equal scalar and vector modified Schioberg plus Manning–Rosen potentials for any quantum numbers n and l. Energy eigenvalues and the scattering amplitude are calculated. Some special cases of the problem are also investigated.

关键词： modified Schioberg plus Manning–Rosen potentials Klein–Gordon equation bound state scattering state scattering amplitude