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arXiv 2023年

作者： Leszczyński, Pawel Kutorasiński, Kamil Szewczyk, Marcin Pawlowski, Jaroslaw Division of Power Apparatus Protection and Control Faculty of Electrical Engineering Electrical Power Engineering Institute Warsaw University of Technology Koszykowa 75 St. Warszawa00-662 Poland Department of Condensed Matter Physics Faculty of Physics and Applied Computer Science AGH University of Krakow Reymonta 19 St. Kraków30-059 Poland Institute of Theoretical Physics Wroclaw University of Science and Technology Wyb. Wyspiańskiego 27 St. Wroclaw50-370 Poland

We present a general framework for modeling power magnetic materials characteristics using deep neural networks. Magnetic materials represented by multidimensional characteristics (that mimic measurements) are used to train the neural autoencoder model in an unsupervised manner. The encoder is trying to predict the material parameters of a theoretical model, which is then used in a decoder part. The decoder, using the predicted parameters, reconstructs the input characteristics. The neural model is trained to capture a synthetically generated set of characteristics that can cover a broad range of material behaviors, leading to a model that can generalize on the underlying physics rather than just optimize the model parameters for a single measurement. After setting up the model, we prove its usefulness in the complex problem of modeling magnetic materials in the frequency and current (out-of-linear range) domains simultaneously, for which we use measured characteristics obtained for frequency up to 10 MHz and H-field up to saturation. Copyright © 2023, The Authors. All rights reserved.

关键词： Deep neural networks

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ARGUABLY @ AI Debater-NLPCC 2021 Task 3: Argument Pair Extraction from Peer Review and Rebuttals 10th

ARGUABLY @ AI Debater-NLPCC 2021 Task 3: Argument Pair Extra...

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10th CCF Conference on Natural Language Processing and Chinese Computing, NLPCC 2021

作者： Kohli, Guneet Singh Kaur, Prabsimran Singh, Muskaan Ghosal, Tirthankar Rana, Prashant Singh Department of Computer Science and Engineering Thapar Institute of Engineering and Technology Patiala India Institute of Formal and Applied Linguistics Faculty of Mathematics and Physics Charles University Prague Czech Republic

ISBN: (纸本)9783030884826

This paper describes our participating system run to the argumentative text understanding shared task for AI Debater at NLPCC 2021 (http://***/sharedtask/AIDebater21/*** ). The tasks are motivated towards developing an autonomous debating system. We make an initial attempt with Track-3, namely, argument pair extraction from peer review and rebuttal where we extract arguments from peer reviews and their corresponding rebuttals from author responses. Compared to the multi-task baseline by the organizers, we introduce two significant changes: (i) we use ERNIE 2.0 token embedding, which can better capture lexical, syntactic, and semantic aspects of information in the training data, (ii) we perform double attention learning to capture long-term dependencies. Our proposed model achieves the state-of-the-art results with a relative improvement of 8.81% in terms of F1 score over the baseline model. We make our code available publicly at https://***/guneetsk99/ArgumentMining_SharedTask. Our team ARGUABLY is one of the third prize-winning teams in Track 3 of the shared task. © 2021, Springer Nature Switzerland AG.

关键词： Extraction

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Integrability and Linearizability of a Family of Three-Dimensional Polynomial Systems

arXiv

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arXiv 2024年

作者： Huang, Bo Mastev, Ivan Romanovski, Valery LMIB School of Mathematical Sciences Beihang University Beijing100191 China Center for Applied Mathematics and Theoretical Physics MariborSI-2000 Slovenia Faculty of Natural Science and Mathematics University of Maribor MariborSI-2000 Slovenia Faculty of Electrical Engineering and Computer Science University of Maribor MariborSI-2000 Slovenia

We investigate the local integrability and linearizability of a family of three-dimensional polynomial systems with the matrix of the linear approximation having the eigenvalues 1, ζ, ζ2, where ζ is a primitive cubic root of unity. We establish a criterion for the convergence of the Poincaré–Dulac normal form of the systems and examine the relationship between the normal form and integrability. Additionally, we introduce an efficient algorithm to determine the necessary conditions for the integrability of the systems. This algorithm is then applied to a quadratic subfamily of the systems to analyze its integrability and linearizability. Our findings offer insights into the integrability properties of three-dimensional polynomial systems. Copyright © 2024, The Authors. All rights reserved.

关键词： Eigenvalues and eigenfunctions

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Design of A Rotated 3D-Printed Lens Antenna Assembly with An Ultra-Wideband Antenna for Beam Steering Applications

Design of A Rotated 3D-Printed Lens Antenna Assembly with An...

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International Electrical Engineering Congress (iEECON)

作者： Patchadaporn Sangpet Wanwisa Thaiwirot Prayoot Akkaraekthalin Nonchanutt Chudpooti Department of Electrical and Computer Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok Bangkok Bangkok Thailand Department of Industrial Physics and Medical Instrumentation Faculty of Applied Science King Mongkut's University of Technology North Bangkok Bangkok Bangkok Thailand

ISBN: (数字)9798350383591

ISBN: (纸本)9798350383607

The paper presents the rotated 3D-printed dielectric lens assembly with an ultra-wideband (UWB) antenna for use in the beam-steering applications. The focus is on achieving beam steering by combining the rotated 3D-printed dielectric lens assembly with a hemispherical lens and UWB antenna. The UWB antenna is fabricated on an FR-4 substrate, while the hemispherical lens and the rotated 3D-printed lens assembly are made from Acrylonitrile Butadiene Styrene (ABS). To enable the hemispherical lens to rotate to the specified angle, a set of rotatable 3D-printed lenses was etched to determine five angles: -60degrees, -30degrees, 0degrees, 30degrees, and 60degrees. Both simulation and measurement results indicate that at a beginning frequency of 3.5 GHz, the beam cannot be steered when using the UWB antenna with the 3D-printed ABS lens rotated hemispherical lens assembly. However, at middle and high frequencies of 7.0 GHz and 10.0 GHz, respectively, the beam can be steered according to the direction of rotation of the hemispherical lens.

关键词： Antenna measurements Beam steering Ultra wideband antennas Frequency measurement Dielectrics High frequency Assembly

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Genuine multifractality in time series is due to temporal correlations

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Physical Review E 2023年第3期107卷 034139-034139页

作者： Jarosław Kwapień Pawel Blasiak Stanisław Drożdż Paweł Oświęcimka Complex Systems Theory Department Institute of Nuclear Physics Polish Academy of Sciences ul. Radzikowskiego 152 31-342 Kraków Poland Institute for Quantum Studies Chapman University Orange California 92866 USA Faculty of Computer Science and Telecommunications Cracow University of Technology ul. Warszawska 24 31-155 Kraków Poland Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University ul. Łojasiewicza 11 30-348 Kraków Poland

Based on the mathematical arguments formulated within the multifractal detrended fluctuation analysis (MFDFA) approach it is shown that, in the uncorrelated time series from the Gaussian basin of attraction, the effects resembling multifractality asymptotically disappear for positive moments when the length of time series increases. A hint is given that this applies to the negative moments as well and extends to the Lévy stable regime of fluctuations. The related effects are also illustrated and confirmed by numerical simulations. This documents that the genuine multifractality in time series may only result from the long-range temporal correlations, and the fatter distribution tails of fluctuations may broaden the width of the singularity spectrum only when such correlations are present. The frequently asked question of what makes multifractality in time series—temporal correlations or broad distribution tails—is thus ill posed. In the absence of correlations only the bifractal or monofractal cases are possible. The former corresponds to the Lévy stable regime of fluctuations while the latter to the ones belonging to the Gaussian basin of attraction in the sense of the central limit theorem.

关键词： Scaling laws of complex systems Stochastic processes & statistics

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Backtesting Framework for Concentrated Liquidity Market Makers on Uniswap V3 Decentralized Exchange

arXiv

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arXiv 2024年

作者： Urusov, Andrey Berezovskiy, Rostislav Yanovich, Yury Vega Institute Foundation Moscow Russia Faculty of Applied Mathematics Physics and Information Technologies Chuvash State University Cheboksary Russia International Laboratory of Stochastic Analysis and its Applications HSE University Moscow Russia Skolkovo Institute of Science and Technology Moscow Russia Faculty of Computer Science HSE University Moscow Russia

Decentralized finance (DeFi) has revolutionized the financial landscape, with protocols like Uniswap offering innovative automated market-making mechanisms. This article explores the development of a backtesting framework specifically tailored for concentrated liquidity market makers (CLMM). The focus is on leveraging the liquidity distribution approximated using a parametric model, to estimate the rewards within liquidity pools. The article details the design, implementation, and insights derived from this novel approach to backtesting within the context of Uniswap V3. The developed backtester was successfully utilized to assess reward levels across several pools using historical data from 2023 (pools Uniswap v3 for pairs of altcoins, stablecoins and USDC/ETH with different fee levels). Moreover, the error in modeling the level of rewards for the period under review for each pool was less than 1%. This demonstrated the effectiveness of the backtester in quantifying liquidity pool rewards and its potential in estimating LP’s revenues as part of the pool rewards, as focus of our next research. The backtester serves as a tool to simulate trading strategies and liquidity provision scenarios, providing a quantitative assessment of potential returns for liquidity providers (LP). By incorporating statistical tools to mirror CLMM pool liquidity dynamics, this framework can be further leveraged for strategy enhancement and risk evaluation for LPs operating within decentralized exchanges. © 2024, CC BY.

关键词： Decentralized finance

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Interdigital CPW Metamaterial Surfaces for Modern Wireless Communication Systems

Interdigital CPW Metamaterial Surfaces for Modern Wireless C...

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2023 IEEE International Symposium on Antennas and Propagation, ISAP 2023

作者： Chomtong, Pongsathorn Krachodnok, Piyaporn Chudpooti, Nonchanutt Akkaraekthalin, Prayoot Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut’s University of Technology North Bangkok Bangkok10800 Thailand Institute of Engineering School of Telecommunication Engineering Suranaree University of Technology Nakhon Ratchasima Thailand Department of Industrial Physics and Medical Instrumentation Faculty of Applied Science King Mongkut’s University of Technology North Bangkok Bangkok10800 Thailand Department of Electrical and Computer Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok Bangkok10800 Thailand

ISBN: (纸本)9798350341140

This paper proposes the design of metamaterial surfaces based on interdigital coplanar waveguide (CPW) unit cells. By using this technique, the unit cell can have negative permeability with size reduction to λ/8. The result causes from the slow wave effect on transmission line in the structure, which electrical and physical lengths of transmission line are not equal from that effect. The proposed matamaterial surfaces at some resonant frequencies have been designed and used as reflectors and directors applied for antenna applications. Using the designed reflectors or directors, the antenna performances have been increased. The proposed metamaterial surfaces will be appropriate for modern wireless communication systems. © 2023 IEEE.

关键词： director interdigital CPW unit cell metamaterial reflector metamaterial surface

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High pressure microreactor for minute amounts of catalyst on planar supports: a case study of CO2 hydrogenation over Pd0.25Zn0.75Ox nanoclusters

SSRN

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SSRN 2024年

作者： Abbas, Imran Romeggio, Filippo Pilarczyk, Kacper Kuhn, Simon Damsgaard, Christian Danvad Kibsgaard, Jakob Lievens, Peter Grandjean, Didier Janssens, Ewald Quantum Solid-State Physics Department of Physics and Astronomy KU Leuven Celestijnenlaan 200D Leuven3001 Belgium Department of Physics Technical University of Denmark Kongens Lyngby2800 Denmark Faculty of Physics and Applied Computer Science AGH University of Science and Technology al. A. Mickiewicza 30 Kraków30-059 Poland Department of Chemical Engineering KU Leuven Celestijnenlaan 200F Leuven3001 Belgium National Centre for Nano Fabrication and Characterization Technical University of Denmark Kongens Lyngby2800 Denmark

igh-pressure studies of well-defined catalysts, deposited on planar supports in ultra-high vacuum using physical methods, may bridge the gap between surface science and applied catalysis approaches in order to develop better catalysts for crucial reactions such as CO2 hydrogenation. However, the chemical reactors necessary for such investigations, typically involving catalyst quantities down to a few hundred nanograms, are lacking. We present the novel design and evaluation of a 50 µL rectangular microchannel reactor capable of testing small quantities of catalyst at pressures up to 40 bar and temperatures up to 240°C. To evaluate the microreactor performance, Pd0.25Zn0.75Ox nanoclusters soft-landed on SiO2-coated mica sheets using the cluster beam deposition technique, were tested for the reverse water-gas shift reaction through a series of kinetic experiments. Experimental results, combined with computational fluid dynamics and mass transport analysis, demonstrate that the proposed microreactor setup allows for testing minute quantities of catalysts with very high sensitivity at industrially relevant temperatures and pressures. Although not restricted to a particular catalyst preparation method, the setup is an excellent platform for conducting catalytic tests on composition-controlled, mass-selected, gas-phase nanoparticles deposited on planar substrates, facilitating the determination of reliable structure-activity relationships and enabling a more rational design of catalysts © 2024, The Authors. All rights reserved.

关键词： Water gas shift

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A $(k, n)$-Secret Image Sharing With Steganography Using Generalized Tent Map

A $(k, n)$-Secret Image Sharing With Steganography Using Gen...

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International Conference on Modern Circuits and Systems Technologies (MOCAST)

作者： Bishoy K. Sharobim Salwa K. Abd-El-Hafiz Ahmed G. Radwan Heba K. Aslan Nanoelectronics Integrated Systems Center (NISC) Nile University Giza Egypt Centre of Informatics Science Faculty of Information Technology and Computer Science Nile University Giza Egypt Engineering Mathematics and Physics Department Faculty of Engineering Cairo University Giza Egypt School of Engineering and Applied Sciences Nile University Giza Egypt

ISBN: (数字)9798350385427

ISBN: (纸本)9798350385434

Secret Image Sharing (SIS) transfers an image to mutually suspicious receivers as $n$ meaningless shares, where $k$ or more shares must be present to recover the secret. This paper proposes a $(k, n)$ -SIS system for any image type using polynomial interpolation based on Lagrange polynomials, where the generated shares are of size $1/k$ of the secret image size. A full encryption system, consisting of substitution and permutation stages, is employed by using the generalized Tent map as a source of randomness. In addition to using a long and sensitive system key, steganography using the Least Significant Bits (LSBs) embedding technique is utilized to improve security. Detailed experimental analysis of the security, robustness and performance of the proposed system is provided, which is more comprehensive than the analyses given in other related works. Security is demonstrated using statistical tests, and robustness against noise and cron attacks is validated.

关键词： Steganography Interpolation Circuits and systems Noise Receivers Robustness Polynomials

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Channel nonlocality under decoherence

arXiv

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arXiv 2024年

作者： Rico, Albert Morán, Moisés Bermejo Shahbeigi, Fereshte Życzkowski, Karol Faculty of Physics Astronomy and Applied Computer Science Institute of Theoretical Physics Jagiellonian University Kraków30-348 Poland Laboratoire d’Information Quantique Université libre de Bruxelles Belgium RCQI Institute of Physics Slovak Academy of Sciences Dúbravská cesta 9 Bratislava84511 Slovakia Center for Theoretical Physics Polish Academy of Science Warszawa02-668 Poland

The implementation of realistic quantum devices requires a solid understanding of the nonlocal resources present in quantum channels, and the effects of decoherence on them. Here we quantify nonlocality of bipartite quantum channels and identify its component resisting the effects of dephasing noise. Despite its classical nature, we demonstrate that the latter plays a relevant role in performing quantum protocols, such as state transformations and quantum coding for noisy communication. In the converse direction, we show that simulating certain stochastic processes with quantum channels undergoing decoherence has a communication advantage with respect to their classical simulation. Copyright © 2024, The Authors. All rights reserved.

关键词： Stochastic systems

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