检索结果-内蒙古大学图书馆

arXiv 2023年

作者： Alghamdi, T. Alanazi, Y. Battaglieri, M. Bibrzycki, L. Golda, A.V. Blin, A.N. Hiller Isupov, E.L. Li, Y. Marsicano, L. Melnitchouk, W. Mokeev, V.I. Montaña, G. Pilloni, A. Sato, N. Szczepaniak, A.P. Vittorini, T. Department of Computer Science Old Dominion University NorfolkVA23529 United States Department of Computer Science College of Computer Science and Information Technology Al-Baha University Al-Baha Alaqiq65779 Saudi Arabia Thomas Jefferson National Accelerator Facility Newport NewsVA23606 United States INFN sezione di Genova GenovaI-16146 Italy AGH University of Krakow Faculty of Physics and Applied Computer Science KrakówPL-30-059 Poland Faculty of Physics Lomonosov Moscow State University Moscow119991 Russia Institute for Theoretical Physics Tübingen University TübingenD-72076 Germany Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow119234 Russia CSSM and CDMPP Department of Physics University of Adelaide 5005 Australia Dipartimento di Scienze Matematiche e Informatiche Scienze Fisiche e Scienze della Terra Università degli Studi di Messina MessinaI-98166 Italy INFN Sezione di Catania CataniaI-95123 Italy Department of Physics Indiana University BloomingtonIN47405 United States Center for Exploration of Energy and Matter Indiana University BloomingtonIN47403 United States Università di Genova GenovaI-16146 Italy

AI-supported algorithms, particularly generative models, have been successfully used in a variety of different contexts. In this work, we demonstrate for the first time that generative adversarial networks (GANs) can be used in high-energy experimental physics to unfold detector effects from multi-particle final states, while preserving correlations between kinematic variables in multidimensional phase space. We perform a full closure test on two-pion photoproduction pseudodata generated with a realistic model in the kinematics of the Jefferson Lab CLAS g11 experiment. The overlap of different reaction mechanisms leading to the same final state associated with the CLAS detector’s nontrivial effects represents an ideal test case for AI-supported analysis. Uncertainty quantification performed via bootstrap provides an estimate of the systematic uncertainty associated with the procedure. The test demonstrates that GANs can reproduce highly correlated multidifferential cross sections even in the presence of detector-induced distortions in the training datasets, and provides a solid basis for applying the framework to real experimental data. Copyright © 2023, The Authors. All rights reserved.

关键词： Generative adversarial networks

来源：评论

学校读者我要写书评

暂无评论

Multi-photon time-of-flight MLEM application for the positronium imaging in J-PET

arXiv

引用

arXiv 2023年

作者： Shopa, Roman Y. Dulski, Kamil Department of Complex Systems National Centre for Nuclear Research Świerk Otwock Poland Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków Poland Center for Theranostics Jagiellonian University Kraków Poland INFN Laboratori Nazionali di Frascati Frascati Italy

We develop a positronium imaging method for the Jagiellonian PET (J-PET) scanners based on the time-of-flight maximum likelihood expectation maximisation (TOF MLEM). The system matrix elements are calculated on-the-fly for the coincidences comprising two annihilation and one de-excitation photons that originate from the ortho-positronium (o-Ps) decay. Using the Geant4 library, a Monte Carlo simulation was conducted for four cylindrical 22Na sources of β+ decay with diverse o-Ps mean lifetimes, placed symmetrically inside the two JPET prototypes. The estimated time differences between the annihilation and the positron emission were aggregated into histograms (one per voxel), updated by the weights of the activities reconstructed by TOF MLEM. The simulations were restricted to include only the o-Ps decays into back-to-back photons, allowing a linear fitting model to be employed for the estimation of the mean lifetime from each histogram built in the log scale. To suppress the noise, the exclusion of voxels with activity below 2% – 10% of the peak was studied. The estimated o-Ps mean lifetimes were consistent with the simulation and distributed quasi-uniformly at high MLEM iterations. The proposed positronium imaging technique can be further upgraded to include various correction factors, as well as be modified according to realistic o-Ps decay models. © 2023, CC BY.

关键词： Medical imaging

来源：评论

学校读者我要写书评

暂无评论

Collisions of weakly-bound kinks in the Christ-Lee model

arXiv

引用

arXiv 2023年

作者： Dorey, Patrick Gorina, Anastasia Romanczukiewicz, Tomasz Shnir, Yakov Department of Mathematical Sciences Durham University United Kingdom African Institute for Mathematical Sciences Muizenberg South Africa Osmanaga Mahallesi Vahapbey Sokak No:8 Kadiköy Istanbul34714 Turkey Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków Poland Institute of Physics University of Oldenburg OldenburgD-26111 Germany

We investigate soliton collisions a one-parameter family of scalar field theories in 1+1 dimensions which was first discussed by Christ and Lee [1]. The models have a sextic potential with three local minima, and for suitably small values of the parameter its kinks have an internal structure in the form of two weakly-bound subkinks. We show that for these values of the parameter kink collisions are best understood as an independent sequence of collisions of these subkinks, and that a static mode analysis is not enough to explain resonant structures emerging in this model. We also emphasise the role of radiation and oscillon formation in the collision process. © 2023, CC BY.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Bulk-boundary correspondence from Hyperinvariant tensor networks

arXiv

引用

arXiv 2024年

作者： Bistroń, Rafal Hontarenko, Mykhailo Życzkowski, Karol Institute of Theoretical Physics Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University ul. Lojasiewicza 11 Kraków30-348 Poland Doctoral School of Exact and Natural Sciences Jagiellonian University ul. Lojasiewicza 11 Kraków30-348 Poland Polish Academy of Sciences Al. Lotników 32/46 Warszawa02-668 Poland

We introduce a tensor network designed to faithfully simulate the AdS/CFT correspondence, akin to the multi-scale entanglement renormalization ansatz (MERA), following hyper-invariant tensor network. The proposed construction integrates bulk indices within the network architecture to uphold the key features of the HaPPY code, including complementary recovery. This framework accurately reproduces the boundary conformal field theory's (CFT) two- and three-point correlation functions, while considering the image of any bulk operator. Furthermore, we provide an explicit methodology for calculating the correlation functions in an efficient manner. Our findings highlight the physical aspects of the relation between bulk and boundary within the tensor network models, contributing to the understanding and simulation of holographic principles in quantum information. © 2024, CC BY.

关键词： Tensors

来源：评论

学校读者我要写书评

暂无评论

A Comparative Simulation Study of DG-MOSFETs: PCMS Approach in FETMOSS vs. CMS in Silvaco TCAD 3

A Comparative Simulation Study of DG-MOSFETs: PCMS Approach ...

引用

3rd Novel Intelligent and Leading Emerging sciences Conference, NILES 2021

作者： Salem, Marwa S. El-Banna, Mohamed Abouelatta, Mohamed Saeed, Ahmed Shaker, Ahmed University of Ha'il Department of Computer Engineering Computer Science and Engineering College Ha'il Saudi Arabia Ain Shams University Engineering Physics and Mathematics Department Faculty of Engineering Cairo Egypt Ain Shams University Electronics and Communication Department Faculty of Engineering Cairo Egypt Future University in Egypt Electrical Engineering Department Faculty of Engineering and Technology Cairo Egypt

ISBN: (纸本)9781665421577

The simulation of quantum transport in DG-MOSFETs could be effectively accomplished by the Partial-Coupled Mode Space (PCMS) approach, which is realized by separating the odd and even modes solutions. This technique combines the merits of Coupled Mode Space (CMS) regarding the accuracy and Uncoupled Mode Space (UMS) as far as reducing computational time is concerned. In this work, a comparison study between PCMS using our developed FETMOSS simulator and CMS using Silvaco TCAD is carried out. The simulation is performed on a set of short-channel DG-MOSFETs. The accuracy at room temperature is found to be less than 8% along the whole range of the supply voltage. Based on this study, the PCMS approach in FETMOSS simulator is validated and proved to trace device performance in reasonable times compared to the TCAD high computational times. © 2021 IEEE.

关键词： MOSFET devices

来源：评论

学校读者我要写书评

暂无评论

applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application

引用

Optoelectronics Letters 2021年第5期17卷 298-301页

作者： Mohd Hafiz Jali Hazli Rafis Abdul Rahim Md Ashadi Md Johari Maslinda Mat Sharif Siti Halma Johari Siddharth Thokchom Habibah Mohamed Moh Yasin Sulaiman Wadi Harun Department of Electrical Engineering University of MalayaKuala Lumpur50603Malaysia Faculty of Electrical Engineering Universiti Teknikal Malaysia MelakaMelaka76100Malaysia Faculty of Electronic and Computer Engineering Universiti Teknikal Malaysia MelakaMelaka76100Malaysia Faculty of Electrical and Electronic Engineering Technology Universiti Teknikal Malaysia MelakaMelaka76100Malaysia School of Technology Assam Don Bosco UniversityGuwahatiAssam781017India Malaysia-Japan International Institute of Technology Universiti Teknologi MalaysiaKuala Lumpur54100Malaysia Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

In this letter,a humidity sensor is demonstrated by applying a whispering gallery mode(WGM)from a microsphere resonator onto the ZnO nanorods coated glass *** diameter of the microsphere was 234μm and the glass surface was coated with ZnO nanorods using the hydrothermal method at growth duration of 12 h.A significant response to humidity level ranging from 35%RH to 85%RH has been observed with the sensitivity of 0.0142 nm/%*** proposed humidity sensor has successfully employed to enhance interaction between the whispering gallery mode evanescent and surrounds analyte with the assistance of ZnO nanorods coated glass.

关键词： WGM ZnO applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application

来源：评论

学校读者我要写书评

暂无评论

Assessment of Biocidal Properties of Nanometric Zinc Films Obtained by Sol-Gel Method

SSRN

引用

SSRN 2024年

作者： Dulian, Piotr Stodolak-Zych, Ewa Nosidlak, Natalia Kluska, Stanislawa Szymczak, Patryk Rapacz-Kmita, Alicja Jaglarz, Janusz Jurzecka-Szymacha, Maria Faculty of Chemical Engineering and Technology Cracow University of Technology Warszawska Street 24 Krakow31-155 Poland Faculty of Materials Science and Ceramics AGH University of Krakow Mickiewicza Av. 30 Krakow30-059 Poland Department of Physics Cracow University of Technology Podchorążych Street 1 Krakow30-084 Poland Academic Centre for Materials and Nanotechnology Kawiory Street 30 Krakow30-055 Poland Institute of Materials Engineering Cracow University of Technology Jana Pawla II Av. 37 Krakow31-864 Poland

The microbiocidal properties of zinc in both elemental and oxide forms are well known. In this paper, a sol-gel was used to form nanometric ZnO layers (40-150nm) on glass substrate. A series of layers of differing in the number of dips (3/6) and the number of heat treatment cycles (773K/1h) were prepared. The first group of prepared layers was annealed after each immersion (x), the second group was annealed once - after all immersions (x*).The obtained layers were characterized in terms of phase composition by X-ray diffraction (XRD) and surface morphology by atomic force microscopy (AFM) and electron scanning microscopy (SEM). The thickness of the layer and its homogeneity were determined by spectroscopic ellipsometry (SE). It was shown that the size of crystallites and the thickness strongly depends on the thermal treatment sequence used;for the layers fixed each time it is in range (18-28nm), for the layers annealed once it is (10-13nm).The presence of crystallites of varying size affects the roughness and wettability of the layer, as well as its bactericidal properties. The obtained layers induce biofilm reduction while maintaining a high degree of translucency, which allows their practical application as a layers for touchscreens, packaging or photovoltaic cells. © 2024, The Authors. All rights reserved.

关键词： Sol-gel process

来源：评论

学校读者我要写书评

暂无评论

Non-equilibrium dynamics of long-range field configurations in the Proca theory and the counterexample to the law of periodic charge oscillations

arXiv

引用

arXiv 2025年

作者： Damski, Bogdan Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science Lojasiewicza 11 Kraków30-348 Poland

Long-range field configurations exist in the Proca theory and their non-equilibrium evolution is of interest in this work. General arguments suggest that a charge can be assigned to them and that its evolution is governed by the law of periodic charge oscillations. We discuss an elegant analytically-solvable example of a field configuration in the Proca theory respecting such a law. We also identify a weak point in the aforementioned general arguments, construct the counterexample to the law of periodic charge oscillations in the Proca theory, and comprehensively discuss it. The Gibbs-Wilbraham phenomenon is discussed in the course of these studies. Copyright © 2025, The Authors. All rights reserved.

关键词： Dynamics

来源：评论

学校读者我要写书评

暂无评论

Time-adjusted analysis shows weak associations between BCG vaccination policy and COVID-19 disease progression 21

Time-adjusted analysis shows weak associations between BCG v...

引用

21st Conference Information Technologies - Applications and Theory, ITAT 2021

作者： Bod’ová, Katarína Boža, Vladimír Brejová, Broňa Kollár, Richard Mikušová, Katarína Vinař, Tomáš Department of Mathematical Analysis and Numerical Mathematics Faculty of Mathematics Physics and Informatics Comenius University Mlynská dolina Bratislava842 48 Slovakia Department of Applied Informatics Faculty of Mathematics Physics and Informatics Comenius University Mlynská dolina Bratislava842 48 Slovakia Department of Computer Science Faculty of Mathematics Physics and Informatics Comenius University Mlynská dolina Bratislava842 48 Slovakia Department of Applied Mathematics and Statistics Faculty of Mathematics Physics and Informatics Comenius University Mlynská dolina Bratislava842 48 Slovakia Department of Biochemistry Faculty of Natural Sciences Comenius University Ilkovičova 6 Bratislava842 48 Slovakia

In this study, we ascertain the associations between BCG vaccination policies and the disease progression in the initial phases of COVID-19 pandemics through analysis of various time-adjusted indicators either directly extracted from the incidence and death reports, or estimated as parameters of disease progression models. We observe weak correlation between BCG vaccination status and indicators related to disease reproduction characteristics. We did not find any associations with case fatality rates (CFR), but the differences in CFR estimates were likely dominated by differences in testing and case reporting between countries. Copyright © 2021 for this paper by its authors.

关键词： Cell proliferation

来源：评论

学校读者我要写书评

暂无评论

An Omnidirectional Antenna with Dual-Gain and High-Gain for WiFi-6 Applications

An Omnidirectional Antenna with Dual-Gain and High-Gain for ...

引用

IEEE International Conference on Electronic Information and Communication technology (ICEICT)

作者： Haolin Wang Botao Feng Xiao Ding Li Deng Sanshan Sun Wenzhe Gu College of Electronics and Information Engineering Shenzhen University Shenzhen China Faculty of Humanities and Arts Macau University of Science and Technology Macau China College of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China College of Physics and Electronic Engineering Sichuan Normal University Sichuan China School of Computer Science and Engineering Huizhou University Huizhou China

This letter proposes a high-gain omnidirectional antenna with dual-band for WiFi-5/WiFi -6 applications. The antenna is basically comprised of several slotted semi-circular radiation patches, L-shaped branch structure patches and coaxial feed sources. Here, symmetrical rectangular slots are used to increase impedance matching. The planar size of antenna is 12×35 mm 2 , which is much smaller than other dual-band WIFI antennas. The simulated results tell that the antenna can be used at 2.4~2.485 GHz and 5.15~5.85 GHz (|S11|

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：