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MRP 2020: The Second Shared Task on Cross-Framework and Cross-Lingual Meaning Representation Parsing 24

MRP 2020: The Second Shared Task on Cross-Framework and Cros...

Shared Task: Cross-Framework Meaning Representation Parsing at 24th Conference on Computational Natural Language Learning, CoNLL 2020

作者： Oepen, Stephan Abend, Omri Abzianidze, Lasha Bos, Johan Hajič, Jan Hershcovich, Daniel Li, Bin O’Gorman, Tim Xue, Nianwen Zeman, Daniel University of Oslo Department of Informatics Norway The Hebrew University of Jerusalem School of Computer Science and Engineering Israel Utrecht University UiL OTS Netherlands University of Groningen Center for Language and Cognition Netherlands Charles University Prague Faculty of Mathematics and Physics Institute of Formal and Applied Linguistics Czech Republic University of Copenhagen Department of Computer Science Denmark Nanjing Normal University School of Chinese Language and Literature China University of Massachusetts at Amherst College of Information and Computer Sciences United States Brandeis University Department of Computer Science United States

ISBN: (纸本)9781952148644

The 2020 Shared Task at the Conference for Computational Language Learning (CoNLL) was devoted to Meaning Representation Parsing (MRP) across frameworks and languages. Extending a similar setup from the previous year, five distinct approaches to the representation of sentence meaning in the form of directed graphs were represented in the English training and evaluation data for the task, packaged in a uniform graph abstraction and serialization;for four of these representation frameworks, additional training and evaluation data was provided for one additional language per framework. The task received submissions from eight teams, of which two do not participate in the official ranking because they arrived after the closing deadline or made use of additional training data. All technical information regarding the task, including system submissions, official results, and links to supporting resources and software are available from the task web site at: http://***. © 2020 Association for Computational Linguistics.

关键词： Directed graphs

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Probabilistic Neural Network - parameters adjustment in classification task

Probabilistic Neural Network - parameters adjustment in clas...

引用

International Joint Conference on Neural Networks (IJCNN)

作者： Piotr A. Kowalski Maciej Kusy Szymon Kubasiak Szymon Łukasik Faculty of Physics and Applied Computer Science AGH University of Science and Technology Cracow Poland Systems Research Institute Polish Academy of Sciences Warsaw Poland Faculty of Electrical and Computer Engineering Rzeszow University of Technology Rzeszow Poland

ISBN: (数字)9781728169262

ISBN: (纸本)9781728169279

This work presents a comparative analysis of probabilistic neural network training methods applied to achieve best performance in various classification tasks. Two result from classical mathematical methods based on the theory of kernel density estimators: the plug-in method and cross-validation procedure. The other two methods are more advanced: a metaheuristic algorithm of particle swarm optimization, and a procedure based on reinforcement learning. Ten data sets, regarded in eleven classification problems, taken from the UCI repository are used for the numerical analysis. A comparative analysis of probabilistic neural network learning methods leads to interesting conclusions. Although it does not allow for unambiguous selection of the best learning method, it provides a possibility of choosing a method that is adequate for the given conditions. The description of this is included in the work.

关键词： Kernel Biological neural networks Smoothing methods Task analysis Probabilistic logic Training Neurons

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Exploring Quantum Average-Case Distances: Proofs, properties, and examples

arXiv

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arXiv 2021年

作者： Maciejewski, Filip B. Puchala, Zbigniew Oszmaniec, Michal Center for Theoretical Physics Polish Academy of Sciences Al. Lotników 32/46 Warszawa02-668 Poland Mountain ViewCA94043 United States Institute of Theoretical and Applied Informatics Polish Academy of Sciences Gliwice44-100 Poland Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland

In this work, we present an in-depth study of average-case quantum distances introduced in [1]. The average-case distances approximate, up to the relative error, the average Total-Variation (TV) distance between measurement outputs of two quantum processes, in which quantum objects of interest (states, measurements, or channels) are intertwined with random quantum circuits. Contrary to conventional distances, such as trace distance or diamond norm, they quantify average-case statistical distinguishability via random quantum circuits. We prove that once a family of random circuits forms an δ-approximate 4-design, with δ = o(d−8), then the average-case distances can be approximated by simple explicit functions that can be expressed via simple degree two polynomials in objects of interest. For systems of moderate dimension, they can be easily explicitly computed-no optimization is needed as opposed to diamond norm distance between channels or operational distance between measurements. We prove that those functions, which we call quantum average-case distances, have a plethora of desirable properties, such as subadditivity w.r.t. tensor products, joint convexity, and (restricted) data-processing inequalities. Notably, all distances utilize the Hilbert-Schmidt (HS) norm, which provides this norm with a new operational interpretation. We also provide upper bounds on the maximal ratio between worst-case and average-case distances, and for each of them, we provide an example that saturates the bound. Specifically, we show that for each dimension d this ratio is at most d12, d, d32 for states, measurements, and channels, respectively. To support the practical usefulness of our findings, we study multiple examples in which average-case quantum distances can be calculated analytically. Copyright © 2021, The Authors. All rights reserved.

关键词： Data handling

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Noninvertibility as a requirement for creating a semigroup under convex combinations of channels

arXiv

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arXiv 2021年

作者： Jagadish, Vinayak Srikanth, R. Petruccione, Francesco Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland Poornaprajna Institute of Scientific Research Bangalore560 080 India Quantum Research Group School of Chemistry and Physics University of KwaZulu-Natal Durban4001 South Africa Durban4001 South Africa

We study the conditions under which a semigroup is obtained upon convex combinations of channels. In particular, we study the set of Pauli and generalized Pauli channels. We find that mixing only semigroups can never produce a semigroup. Counter-intuitively, we find that for a convex combination to yield a semigroup, most of the input channels have to be noninvertible. © 2021, CC BY.

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Universality of local spectral statistics of products of random matrices

引用

Physical Review E 2020年第5期102卷 052134-052134页

作者： Gernot Akemann Zdzislaw Burda Mario Kieburg Faculty of Physics Bielefeld University Postfach 100131 D-33501 Bielefeld Germany Faculty of Physics and Applied Computer Science AGH University of Science and Technology al. Mickiewicza 30 PL-30059 Krakow Poland School of Mathematics and Statistics University of Melbourne 813 Swanston Street Parkville Melbourne VIC 3010 Australia

We derive exact analytical expressions for correlation functions of singular values of the product of M Ginibre matrices of size N in the double scaling limit M,N→∞. The singular value statistics is described by a determinantal point process with a kernel that interpolates between Gaussian unitary ensemble statistic and Dirac-delta (picket-fence) statistic. In the thermodynamic limit N→∞, the interpolation parameter is given by the limiting quotient a=N/M. One of our goals is to find an explicit form of the kernel at the hard edge, in the bulk, and at the soft edge for any a. We find that in addition to the standard scaling regimes, there is a transitional regime which interpolates between the hard edge and the bulk. We conjecture that these results are universal, and that they apply to a broad class of products of random matrices from the Gaussian basin of attraction, including correlated matrices. We corroborate this conjecture by numerical simulations. Additionally, we show that the local spectral statistics of the considered random matrix products is identical with the local statistics of Dyson Brownian motion with the initial condition given by equidistant positions, with the crucial difference that this equivalence holds only locally. Finally, we have identified a mesoscopic spectral scale at the soft edge which is crucial for the unfolding of the spectrum.

关键词： Brownian motion Critical phenomena Integrable systems Random matrix theory

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Synthesis of europium-based crystals containing As or P by a flux method: attempts to grow EuAgP single crystals

arXiv

引用

arXiv 2025年

作者： Podgórska, Karolina Rybicki, Damian Tran, Lan Maria Tabiś, Wojciech Gondek, Lukasz Babij, Michal AGH University of Krakow Faculty of Physics and Applied Computer Science al. A. Mickiewicza 30 Kraków30-059 Poland Institute of Low Temperature and Structure Research Polish Academy of Sciences Okólna 2 Wroclaw50-422 Poland

Europium-based materials are highly attractive due to their diverse range of physical properties. In these studies, we aimed to synthesize single crystals of the potentially topological semimetallic compound EuAgP, which up to this day has only been obtained in polycrystalline form. The flux method was employed for the syntheses, using fluxes such as: Bi, Sn, Pb, and In, in their various ratios. The purpose of using Bi flux was to try synthesizing an analog of EuAgAs single crystals, by fully substituting arsenic with phosphorus. The obtained crystals were characterized by x-ray diffraction and scanning electron microscopy. Despite many unsuccessful attempts to synthesize EuAgP single crystals, the study provides valuable insights into how different fluxes and their ratios influence the final synthesis product. It also underscores the complexity of designing analogs between arsenides and phosphides. © 2025, CC BY.

关键词： Crystal growth from melt

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Charge order above room-temperature in a prototypical kagome superconductor La(Ru1−xFex)3Si2

arXiv

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arXiv 2023年

作者： Plokhikh, I. Mielke, C. Nakamura, H. Petricek, V. Qin, Y. Sazgari, V. Küspert, J. Bialo, I. Shin, S. Ivashko, O. Zimmermann, M.V. Medarde, M. Amato, A. Khasanov, R. Luetkens, H. Fischer, M.H. Hasan, M.Z. Yin, J.-X. Neupert, T. Chang, J. Xu, G. Nakatsuji, S. Pomjakushina, E. Gawryluk, D.J. Guguchia, Z. Laboratory for Multiscale Materials Experiments Paul Scherrer Institut Villigen PSICH-5232 Switzerland Laboratory for Muon Spin Spectroscopy Paul Scherrer Institute Villigen PSICH-5232 Switzerland Physik-Institut Universität Zürich Winterthurerstrasse 190 ZürichCH-8057 Switzerland University of Tokyo Chiba Kashiwa277-8581 Japan Institute of Physics CAS Na Slovance 1999/2 Praha Czech Republic Wuhan National High Magnetic Field Center School of Physics Huazhong University of Science and Technology Wuhan430074 China AGH University of Science and Technology Faculty of Physics and Applied Computer Science Kraków30-059 Poland Laboratory for Multiscale Materials Experiments Paul Scherrer Institut Villigen PSI5232 Switzerland Deutsches Elektronen-Synchrotron DESY Notkestraße 85 Hamburg22607 Germany Department of Physics Princeton University PrincetonNJ08544 United States

The kagome lattice [1] is an intriguing and rich platform [2–5] for discovering, tuning and understanding the diverse phases of quantum matter, which is a necessary premise for utilizing quantum materials in all areas of modern and future electronics in a controlled and optimal way. The system LaRu3Si2 [6, 7] was shown to exhibit typical kagome band structure features near the Fermi energy formed by the Ru-dz2 orbitals [8] and the highest superconducting transition temperature Tc 7 K among the kagome-lattice materials. However, the effect of electronic correlations on the normal state properties remains elusive. Here, we report the discovery of charge order in La(Ru1−xFex)3Si2 (x = 0, 0.01, 0.05) beyond room-temperature. Namely, single crystal X-ray diffraction reveals charge order with a propagation vector of (1/4, 0, 0) below TCO−I 400 K in all three compounds. At lower temperatures, we see the appearance of a second set of charge order peaks with a propagation vector of (1/6, 0, 0). The introduction of Fe, which is known to quickly suppress superconductivity [8], does not drastically alter the onset temperature for charge order. Instead, it broadens the scattered intensity such that diffuse scattering appears at the same onset temperature, however does not coalesce into sharp Bragg diffrac- tion peaks until much lower in temperature. Our results present the first example of a charge ordered state at or above room temperature in the correlated kagome lattice with bulk superconductivity. Copyright © 2023, The Authors. All rights reserved.

关键词： Room temperature

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Graphene Terahertz Devices for Sensing and Communication

arXiv

引用

arXiv 2024年

作者： Samaha, Anna-Christina Doumani, Jacques Kritzell, T. Elijah Xu, Hongjing Baydin, Andrey Ajayan, Pulickel M. Tahchi, Mario El Kono, Junichiro Laboratory of Biomaterials and Intelligent Materials Department of Physics Faculty of Sciences 2 Lebanese University P.O. Box 90656 Jdeidet Lebanon Department of Electrical and Computer Engineering Rice University 6100 Main Street HoustonTX77005 United States Applied Physics Graduate Program Smalley–Curl Institute Rice University 6100 Main Street HoustonTX77005 United States Department of Physics and Astronomy Rice University 6100 Main Street HoustonTX77005 United States Smalley–Curl Institute Rice University 6100 Main Street HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University 6100 Main Street HoustonTX77005 United States Carbon Hub Rice University 6100 Main Street HoustonTX77005 United States

Graphene-based terahertz (THz) devices have emerged as promising platforms for a variety of applications, leveraging graphene’s unique optoelectronic properties. This review explores recent advancements in utilizing graphene in THz technology, focusing on two main aspects: THz molecular sensing and THz wave modulation. In molecular sensing, the environment-sensitive THz transmission and emission properties of graphene are utilized for enabling molecular adsorption detection and biomolecular sensing. This capability holds significant potential, from the detection of pesticides to DNA at high sensitivity and selectivity. In THz wave modulation, crucial for next-generation wireless communication systems, graphene demonstrates remarkable potential in absorption modulation when gated. Novel device structures, spectroscopic systems, and metasurface architectures have enabled enhanced absorption and wave modulation. Furthermore, techniques such as spatial phase modulation and polarization manipulation have been explored. From sensing to communication, graphene-based THz devices present a wide array of opportunities for future research and development. Finally, advancements in sensing techniques not only enhance biomolecular analysis but also contribute to optimizing graphene’s properties for communication by enabling efficient modulation of electromagnetic waves. Conversely, developments in communication strategies inform and enhance sensing capabilities, establishing a mutually beneficial relationship. © 2024, CC BY.

关键词： Graphene

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Radio resource management in 5G networks

Radio resource management in 5G networks

引用

2020 International Conference Engineering and Telecommunication, En and T 2020

作者： Chernov, Alexey Matyukhin, Vladislav Somov, Michael Barashov, Egor Chernova, Julia Mishin, Victor MIPT-School of Applied Mathematics and Computer Science Moscow Institute of Physics and Technology Moscow Russia Moscow State University Moscow Russia V.A. Trapeznikov Institute of Control Sciences Moscow State University Moscow Russia Moscow State University Faculty of Mechanics and Mathematics Moscow Russia

ISBN: (纸本)9781728188294

In this work, we study the resource allocation problem for downlink in5G New Radio (NR) mobile networks in the case of orthogonal frequency-division multiple access (OFDMA). One of the key features of 5G mobile networks is the usage of antenna arrays that allows them to form beams in a specific direction and send data to several users at the same transmission time interval (TTI) via the same carrier or resource block (RB). Antenna arrays usually contain up to 64 single antennas. We modeled the process of the data transmission from the cell to the user device or user equipment (UE), formulated mathematical abstraction of the resource allocation problem, and proposed a lightweight algorithm that uses a proportional fair metric. © 2020 IEEE.

关键词： 5G mobile communication systems

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Quantum Resource Theories beyond Convexity

arXiv

引用

arXiv 2024年

作者： Salazar, Roberto Czartowski, Jakub Rodríguez, Ricard Ravell Rajchel-Mieldzioć, Grzegorz Horodecki, Pawel Życzkowski, Karol Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland Doctoral School of Exact and Natural Sciences Jagiellonian University ul. Lojasiewicza 11 Kraków30-348 Poland Campus Universitat Illes Balears Palma de MallorcaE-07122 Spain NASK National Research Institute ul. Kolska 12 Warszawa01-045 Poland ICFO-Institut de Ciencies Fotoniques The Barcelona Institute of Science and Technology Av. Carl Friedrich Gauss 3 Castelldefels Barcelona08860 Spain International Centre for Theory of Quantum Technologies University of Gdańsk Wita Stwosza 63 Gdańsk80-308 Poland Center for Theoretical Physics Polish Academy of Sciences Warszawa02-668 Poland

A class of quantum resource theories, based on non-convex star-shape sets, presented in this work captures the key quantum properties that cannot be studied by standard convex theories. We provide operational interpretations for a resource of this class and demonstrate its advantage to improve performance of correlated quantum discrimination tasks and testing of quantum combs. Proposed techniques provide useful tools to describe quantum discord, total correlations in composite quantum systems and to estimate the degree of non-Markovianity of an analyzed quantum dynamics. Other applications include the problem of unistochasticity of a given bistochastic matrix, with relevance for quantization of classical dynamics and studies of violation of CP-symmetry in high energy physics. In all these cases, the non-linear witnesses introduced here outperform the standard linear witnesses. Importance of our findings for quantum information theory is also emphasized. Copyright © 2024, The Authors. All rights reserved.

关键词： Quantum optics

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