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3rd Conference on Facing the Multicore-Challenge

作者： Bialas, Piotr Kowal, Jakub Strzelecki, Adam Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University ul. Reymonta 4 30-059 Krakow Poland

ISBN: (纸本)9783642358920

This contribution is concerned with an efficient implementation of the Monte- Carlo simulations of the φ 4 model[1]. The problem is defined as follows: having a vector field φ defined on a regular rectangular two or three dimensional grid we want to generate the field configurations with probability proportional to exp(-H(φ)) where H(φ) is some function of all the fields φ i . © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Monte Carlo methods

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Scaled tight-binding model for a two-dimensional electron gas at the (001) LaAlO3/SrTiO3 interface

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Physical Review applied 2025年第5期23卷 054051-054051页

作者： Paweł Wójcik Roberta Citro Bartłomiej Szafran Faculty of Physics and Applied Computer Science AGH University of Krakow Al. Mickiewicza 30 Kraków 30-059 Poland Physics Department “E. R. Caianiello” and CNR-SPIN Universitá degli Studi di Salerno INFN Gruppo Collegato di Salerno 84084-Fisciano (Sa) Italy

Progress in the fabrication of nanoscale systems based on the two-dimensional electron gas (2DEG) at the interface between LaAlO3 and SrTiO3 (LAO/STO) has created increased demand for simulations of these nanostructures, which typically range in size from tens to hundreds of nanometers. Due to the low lattice constant of LAO/STO, approximately 0.39 nm, these calculations become extremely time-consuming. Here, we present a scaling procedure for the tight-binding approximation of the LAO/STO 2DEG, defined on a square lattice that can be several times larger than in the conventional approach. The scaled model is analyzed within the context of quantum transport simulations and electronic structure calculations. Our findings demonstrate that the scaled model closely aligns with the ordinary one up to a scaling factor of 8. The applicability of the scaled Hamiltonian for systems with interacting electrons is also discussed. These results pave the way for more efficient simulations of LAO/STO nanostructures with realistic sizes relevant to experimental applications.

关键词： Lattice constants

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Reconstruction techniques and physics case for displaced tracks and vertices at LHC 32

Reconstruction techniques and physics case for displaced tra...

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32nd International Workshop on Vertex Detectors, VERTEX 2023

作者： Oblakowska-Mucha, Agnieszka Faculty of Physics and Applied Computer Science AGH University of Krakow Al. Mickiewicza 30 Krakow30-059 Poland

The primary focus of the LHC experiments was the observation of Standard Model particles and the search for unexplored signatures indicative of New physics. Given the current discoveries and measurements done so far, the detectors and the trigger architecture are being changed to allow for the searches of long-lived particles. LHCb's trackers have excelled in the precise reconstruction of heavy flavour hadrons, and the experiment is now at the forefront of designing flexible trigger systems. Similarly, ATLAS and CMS, with their precise trackers, are also exploring new avenues by implementing innovative triggers to search for long-lived particles. The techniques of the reconstruction of displaced tracks and vertices in the upgraded LHCb detector, complementary with other general-purpose detectors at the LHC, are presented in this proceedings. © Copyright owned by the author(s)

关键词： Hadrons

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Studying π+π− photoproduction beyond Pomeron exchange

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Physical Review D 2025年第1期111卷 014002-014002页

作者： Łukasz Bibrzycki Nadine Hammoud Vincent Mathieu Robert J. Perry Alex Akridge César Fernández-Ramírez Gloria Montaña Alessandro Pilloni Arkaitz Rodas AGH University of Krakow Faculty of Physics and Applied Computer Science PL-30-059 Kraków Poland Institute of Nuclear Physics Polish Academy of Sciences 31-342 Kraków Poland Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos Universitat de Barcelona E-08028 Barcelona Spain Center for Exploration of Energy and Matter Indiana University Bloomington Indiana 47403 USA Department of Physics Indiana University Bloomington Indiana 47405 USA Departamento de Física Interdisciplinar Universidad Nacional de Educación a Distancia (UNED) E-28040 Madrid Spain Theory Center Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA Dipartimento di Scienze Matematiche e Informatiche Scienze Fisiche e Scienze della Terra Università degli Studi di Messina I-98166 Messina Italy INFN Sezione di Catania I-95123 Catania Italy Department of Physics Old Dominion University Norfolk Virginia 23529 USA

Forward photoproduction of π+π− pairs with invariant mass of the order of mρ∼770 MeV is traditionally attributed to Pomeron exchange. Based on a detailed analysis of the CEBAF Large Acceptance Spectrometer photoproduction data collected at photon energies below 4 GeV, it is shown from a study of the angular moments that the dynamics of two-pion photoproduction for |t|≳0.5 GeV2 cannot be explained by Pomeron exchange alone. This motivates the development of a new theoretical model of two-pion photoproduction which incorporates both two-pion and pion-nucleon resonant contributions. After fitting free parameters, the model provides an excellent description of the low moments of the angular distribution measured at CLAS and enables an assessment of the relative contributions of particular production mechanisms and an interpretation of the various features of the data in terms of these mechanisms.

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Least squares K-SVCR multi-class classification 1

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14th International Conference on Learning and Intelligent Optimization, LION 2020

作者： Moosaei, Hossein Hladík, Milan Department of Mathematics Faculty of Science University of Bojnord Bojnord Iran Department of Applied Mathematics School of Computer Science Faculty of Mathematics and Physics Charles University Prague Czech Republic

ISBN: (数字)9783030535520

ISBN: (纸本)9783030535513

The support vector classification-regression machine for K-class classification (K-SVCR) is a novel multi-class classification method based on "1-versus-1-versus-rest" structure. In this paper, we propose a least squares version of K-SVCR named as LSK-SVCR. Similarly as the K-SVCR algorithm, this method assess all the training data into a "1-versus-1-versus-rest" structure, so that the algorithm generates ternary output $$ \{-1, 0, +1\}$$. In LSK-SVCR, the solution of the primal problem is computed by solving only one system of linear equations instead of solving the dual problem, which is a convex quadratic programming problem in K-SVCR. Experimental results on several benchmark data set show that the LSK-SVCR has better performance in the aspects of predictive accuracy and learning speed. © Springer Nature Switzerland AG 2020.

关键词： Support vector machines

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Phase Separation in PCDTBT:PCBM Blends:from Flory-Huggins Interaction Parameters to Ternary Phase Diagrams

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Chinese Journal of Polymer science 2020年第9期38卷 1025-1033,I0009页

作者： Monika Biernat Pawel Dabczynski Pawel Biernat Jakub Rysz Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science ul.lojasiewicza 1130-348 KrakówPoland Mathematisches Institut Rheinische Friedrich-Wilhelms-Universitat BonnEndenicher Allee 6053115 BonnGermany

The substantial increase in the efficiency of organic solar cells achieved in recent years would not have been possible without work on the synthesis of new materials and understanding the relationship between the morphology and performance of organic photovoltaic *** structure of solvent-cast active layers is a result of phase separation in mixtures of donor and acceptor *** a large extent,this process depends on the interactions between the components of the ***,we present a systematic analysis of the morphology of poly[N-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)](PCDTBT)and[6,6]-phenyl-C71-butyric acid methyl ester(PC70BM)films in terms of the ternary phase *** interaction parameters between PCDTBT and four different solvents,namely chloroform,chlorobenzene,o-dichlorobenzene,and toluene,were estimated based on swelling *** on these values,ternary phase diagrams of PCDTBT:PC70BM in different solvents were *** morphology of spin-coated films with different blend ratios cast from different solvents is discussed in terms of the obtained phase diagrams.

关键词： PCDTBT Ternary phase diagrams Interaction parameter Swelling

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Modal structure of a cylindrical duct acoustic field-theoretical predictions and experimental verification 7

Modal structure of a cylindrical duct acoustic field-theoret...

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7th Forum Acusticum, FA 2014

作者： Gorazd, Lukasz Kolber, Karolina Raab, Slawomir Smolik, Damian Department of Mechanics and Vibroacoustics Faculty of Mechanical Engineering and Robotics AGH University of Science and Technology Cracow Poland Faculty of Physics and Applied Computer Science AGH University of Science and Technology Cracow Poland

ISBN: (纸本)9788361402282

The paper presents consistence of the theoretical predictions with obtained experimental results of the pressure field inside a wave-guide modeled mathematically as an infinite/semi-infinite cylindrical duct. The experiments were carried out in two ducts of radius 77 mm and 150 mm. The distribution of the acoustic pressure was measured by means of 1/4 inch microphone on four different duct cross sections with the step 5 mm along the duct radius and 15° in the azimuthal angle. Based on the measurement data the complex amplitudes (i.e. amplitude module and phase) were calculated solving the inverse problem by means of the least square method The obtained experimental data present, in general, consistence with the theoretical predictions, however the accuracy has been improved with the duct radius. The up to date experimental results confirm the multimodal structure of the sound field inside a cylindrical duct. Moreover, the theoretical values of the cut-on frequencies calculated for a hard duct are in very good agreement with the observed ones. These findings confirm that the assumptions of the hard duct and the lossless environment are well justified.

关键词： Ducts

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Experimental studies of three-nucleon-system dynamics in proton-induced deuteron breakup at 108 MeV

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Physical Review C 2025年第5期111卷 054001-054001页

作者： A. Łobejko E. Stephan I. Ciepał J. Golak N. Kalantar–Nayestanaki S. Kistryn B. Kłos A. Kozela P. Kulessa W. Parol R. Skibiński I. Skwira-Chalot A. Szadziński A. Wilczek H. Witała B. Włoch J. Zejma Institute of Physics University of Silesia PL-41500 Chorzów Poland Institute of Experimental Physics Faculty of Mathematics Physics and Informatics University of Gdańsk PL-80308 Gdańsk Poland Institute of Nuclear Physics PAS PL-31342 Kraków Poland Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University PL-30348 Kraków Poland ESRIG University of Groningen 9747 AA Groningen The Netherlands Faculty of Physics University of Warsaw PL-02093 Warszawa Poland Université de Bordeaux CNRS LP2I Bordeaux FR-33170 Gradignan France

The differential cross sections for the H2(p,pp)n reaction have been measured for 84 angular configurations of the outgoing protons in the range of polar angles from 13∘ to 33∘ with a proton beam of 108 MeV. Data have been collected in the Cyclotron Center Bronowice at the Institute of Nuclear physics PAS in Kracow using the BINA detector setup. Analysis leading to determination of the breakup cross-section values is described. Absolute normalization is obtained by normalization to the simultaneously measured H2(p,d)p scattering events. Experimental results are compared to the state-of-the-art theoretical calculations. Global analysis shows significant influence of the Coulomb interaction and small effects of three-nucleon force in the studied phase-space region.

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Critical Behaviour of the Ising S=1/2 and S=1 Model on(3,4,6,4)and(3,3,3,3,6)Archimedean Lattices

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Communications in Computational physics 2011年第9期10卷 912-919页

作者： F.W.S.Lima J.Mostowicz K.Malarz Dietrich Stauffer Computational Physics Lab Departamento de FisicaUniversidade Federal do Piaui64049-550 TeresinaPiauiBrazil Faculty of Physics and Applied Computer Science AGH University of Science and Technologyal.Mickiewicza 30PL-30059 KrakowPoland.

We investigate the critical properties of the Ising S=1/2 and S=1 model on(3,4,6,4)and(34,6)Archimedean *** system is studied through the extensive Monte Carlo *** calculate the critical temperature as well as the critical point exponentsγ/ν,β/ν,andνbasing on finite size scaling *** calculated values of the critical temperature for S=1 are kBTC/J=1.590(3),and kBTC/J=2.100(4)for(3,4,6,4)and(34,6)Archimedean lattices,*** critical exponentsβ/ν,γ/ν,and 1/ν,for S=1 areβ/ν=0.180(20),γ/ν=1.46(8),and 1/ν=0.83(5),for(3,4,6,4)and 0.103(8),1.44(8),and 0.94(5),for(34,6)Archimedean *** results differ from the Ising S=1/2 model on(3,4,6,4),(34,6)and square *** evaluated effective dimensionality of the system for S=1 are Deff=1.82(4),for(3,4,6,4),and Deff=1.64(5)for(34,6).

关键词： Monte Carlo simulation Ising model critical exponents

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A feature weighted K-nearest neighbor algorithm based on association rules

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Journal of Ambient Intelligence and Humanized Computing 2024年第7期15卷 2995-3008页

作者： Manzali, Youness Barry, Khalidou Abdoulaye Flouchi, Rachid Balouki, Youssef Elfar, Mohamed Laboratory of Applied Physics Computer Science and Statistics Faculty of Sciences Dhar El Mehraz Sidi Mohamed Ben Abdellah University Fez Morocco Laboratory of Microbial Biotechnology and Bioactive Molecules Science and Technologies Faculty Sidi Mohamed Ben Abdellah University Fez Morocco Science and Technologies Faculty University Hassan 1st Settat Morocco

K-nearest neighbors (kNN) is a popular machine learning algorithm because of its clarity, simplicity, and efficacy. kNN has numerous drawbacks, including ignoring issues like class distribution, feature relevance, neighbor contribution, and the number of individuals for each class. In particular, some features could be more important than others for classifying a data point, and increasing their weight in the distance computation can make the kNN algorithm more accurate. Researchers propose different feature weightings, such as correlation-based feature selection, mutual information, and chi-square feature selection. This paper presents a new feature weighting technique based on association rules and information gain. The proposed approach gives a good performance compared to other similar methods. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Association rules

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