检索结果-内蒙古大学图书馆

36th Annual International Symposium on Lattice Field Theory, LATTICE 2018

作者： Alexandrou, Constantia Bacchio, Simone Constantinou, Martha Howarth, Dean Lauer, Colin Hadjiyiannakou, Kyriakos Koutsou, Giannis Jansen, Karl Department of Physics University of Cyprus P.O. Box 20537 Nicosia1678 Cyprus Computation-based Science and Technology Research Center Cyprus Institute 20 Konstantinou Kavafi Str. Nicosia2121 Cyprus Department of Physics Temple University PhiladelphiaPA United States Physics Division Argonne National Laboratory ArgonneIL United States NIC DESY Platanenallee 6 ZeuthenD-15738 Germany

In this work we present preliminary results on the nucleon axial and tensor charges, the quark momentum fraction and the first moment of the helicity distribution. The simulations have been performed using two Nf=2 and Nf=2+1+1 ensembles. Both ensembles have a twisted mass action with a clover term with the quark masses fixed at their physical values (physical point) and volumes of 643×128. The extracted quantities are compared with results from an existing Nf=2 (483×96) ensemble. This comparison allows one to address volume and quenching effects. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Lattice theory

来源：评论

学校读者我要写书评

暂无评论

Generalized form factors of the pion and kaon using twisted mass fermions 40

Generalized form factors of the pion and kaon using twisted ...

引用

40th International Symposium on Lattice Field Theory, LATTICE 2023

作者： Delmar, Joseph Alexandrou, Constantia Bacchio, Simone Cloët, Ian Constantinou, Martha Koutsou, Giannis Department of Physics Temple University 1925 N.12th Street PhiladelphiaPA19122-1801 United States Department of Physics University of Cyprus P.O.Box 20537 Nicosia1678 Cyprus Computation-based Science and Technology Research Center The Cyprus Institute 20 Kavafi Str. Nicosia2121 Cyprus Physics Division Argonne National Laboratory LemontIL60439 United States

We present an update on our lattice calculations of the Mellin moments of PDFs and GPDs for the pion and kaon, using momentum-boosted meson *** particular, we focus on the calculation of the scalar and tensor local operators, and the vector operator with up to three-covariant *** corresponding matrix elements allow us to extract the scalar and tensor charges, as well as 〈xn〉 with n = 1, 2, *** addition, we introduce momentum transfer between the initial and final meson state that leads to the scalar, vector, and tensor form factors, and the generalized form factors up to three covariant *** above results are obtained using two ensembles of maximally twisted mass fermions with clover improvement with two degenerate light, a strange, and a charm quark (N f = 2 + 1 + 1) at lattice spacings of 0.093 fm and 0.081 *** pion mass of the ensembles is about 260 *** study excited-states effects by analyzing four values of the source-sink time separation (1.12-1.67 fm).We also examine discretization and volume *** lattice data are renormalized non-perturbatively, and the results are presented in the MS scheme at a scale of 2 GeV. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Tensors

来源：评论

学校读者我要写书评

暂无评论

Comparison of deuterium retention in tungsten exposed to deuterium plasma and gas

arXiv

引用

arXiv 2019年

作者： Ye, Xiaoqiu Wang, Wei Wang, Yifang Chen, Xiaohong Wu, Jiliang Xiao, Yao Wang, Xuefeng Yan, Jun Yu, Wenzhen Chen, Changan Science and Technology on Surface Physics and Chemistry Laboratory Mianyang621907 China School of Sciences and Research Center for Advanced Computation Xihua University Chengdu610039 China

Deuterium(D) retention behavior in tungsten(W) exposed to deuterium plasma and gas was studied by means of thermal desorption spectroscopy (TDS): deuterium plasma exposure in which W was exposed to D plamsa with 35 eV/D+ at 393 K to the fluence of 3.8×1024 D/m2;D2 gas charging in which W was exposed to D2 gas of 500 kPa at 773 K for 4 hours. TDS shows that the total D retention in plasma exposure W is ~1022 D/m2, one order of magnitude higher than that of gas charging W;however, the D2 desorption peak of gas charging W is 952 K, much higher than 691 K of plasma exposure W. The detrapping energies of deuterium were determined experimentally from the measured peak temperatures at different heating rates and were found to be 2.17 eV for gas charging W and 1.04 eV for plasma exposure W, respectively. Copyright © 2019, The Authors. All rights reserved.

关键词： Tungsten

来源：评论

学校读者我要写书评

暂无评论

Selective and incremental fusion for fuzzy and uncertain data based on probabilistic graphical model

Selective and incremental fusion for fuzzy and uncertain dat...

引用

作者： Zhu, Yungang Liu, Dayou Li, Yong Wang, Xinhua College of Computer Science and Technology Jilin University No. 2699 Qianjin Street Changchun China State Key Laboratory of Applied Optics Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun Jilin China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun China College of Mathematics Jilin University Changchun China

Active and dynamic fusion for fuzzy and uncertain data have key challenges such as high complexity and difficult to guarantee accuracy, etc. In order to resolve the challenging issues, in this article a selective and incremental data fusion approach based on probabilistic graphical model is proposed. General Bayesian networks are adopted to represent the relationship among the data and fusion result. It purposively selects the most informative and decision-relevant data for fusion based on Markov Blanket in probabilistic graphical model. Meanwhile we present a special incremental learning method for updating the fusion model to reflect the temporal changes of environment. Theoretical analysis and experimental results all demonstrate the proposed method has higher accuracy and lower time complexity than existing state-of-the-art methods. © 2015 - IOS Press and the authors. All rights reserved.

关键词： Data fusion

来源：评论

学校读者我要写书评

暂无评论

An R-SIFT Image Matching Intelligent Algorithm Applied to Hardware Trojan Detection

An R-SIFT Image Matching Intelligent Algorithm Applied to Ha...

引用

作者： Chen Sun Pujiang Liang Lingling Li Jingjing Ma Licheng Jiao Fang Liu Science and Technology on Reliability Physics and Application of Electronic Component Laboratory Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education International Research Center for Intelligent Perception and ComputationJoint International Research Laboratory of Intelligent Perception and ComputationSchool of Artificial IntelligenceXidian University

Malicious modification, deletion or addition of some modules in the integrated circuits(ICs) will cause the chip to be attacked, which is called Hardware Trojans(HTs). Reverse engineering(RE) is a classic destructive method and widely used in HTs detection. However, RE is very time-consuming and error prone. In this paper, based on RE, we propose the R-SIFT algorithm to match image and reformulate the Trojan detection problem as change detection problem. For the R-SIFT algorithm, the ratio of exponentially weighted averages(Roewa) operator is introduced into the scale-invariant feature transform(SIFT) algorithm. Experiments show that the proposed method has 7 to 56 times more matching points than the original SIFT can be effectively applied to HTs detection.

关键词： Trojan detection R-SIFT Image matching

来源：评论

学校读者我要写书评

暂无评论

The Optical Properties of Few-Layer Mos2 by Dft Calculations

SSRN

引用

SSRN 2023年

作者： Tan, Fengxue Li, Jinhua Fang, Xuan Guan, Li Nanophotonics and Biophotonics Key Laboratory of Jilin Province School of Physics Changchun University of Science and Technology Changchun130022 China Key Laboratory of High-precision Computation Application of Quantum Field Theory of Hebei Province College of Physics Science and Technology Hebei University Baoding071002 China

In this work, the electric and optical properties of few layer MoS2 were systematically investigated theoretically and experimentally, especially monolayer and bilayer. Firstly, the effects of different pseudopotentials on the calculation results of MoS2 have been investigated. It indicates that the normal-conserving pseudopotential is suitable for accurate calculations of the electronic properties. Then, for deep understanding of the photoluminescence mechanism of MoS2, the electronic structure and optical properties of MoS2 were calculated by first-principles calculations with normal-conserving pseudopotential. The density of states of bilayer MoS2 at the Fermi level was higher than that of monolayer MoS2, indicating that bilayer MoS2 has a larger carrier density. Comparing the optical properties of monolayer and bilayer MoS2, it can be concluded that along the C-axis direction, bilayer MoS2 exhibits higher absorption in the wavelength range of 496-1240 nm, while the monolayer one has a remarkable absorption below 496 nm. These findings indicate that bilayer MoS2 preferentially absorbs visible and near-infrared light, while monolayer MoS2 tends to absorb ultraviolet light. These explained the different absorption characteristics of monolayer and bilayer MoS2 and give guidance for selecting the thickness of MoS2 material in applications of optoelectronic devices. © 2023, The Authors. All rights reserved.

关键词： Monolayers

来源：评论

学校读者我要写书评

暂无评论

Ultra-stable tellurium-doped carbon quantum dots for cell protection and near-infrared photodynamic application

引用

science Bulletin 2020年第18期65卷 1580-1586,M0004页

作者： Hao Chen Kaikai Wen Jingya Chen Wang Xing Xiaoxi Wu Qinqin Shi Aidong Peng Hui Huang Center of Materials Science and Opto-electronic Technology College of Materials Science and Opto-electronic Technology&CAS Center for Excellence in Topological Quantum Computation&CAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(1AM)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech UniversityNanjing 211816China

It is important to regulate the concentration of reactive oxygen species(ROS)in cells since they play important roles in ***,developing nanoreagents to control the ROS is ***,tellurium-doped carbon quantum dots(Te-CDs)were developed by a simple and efficient hydrothermal method,which can scavenge H2O2 to protect cells under ambient condition,but generateáOH under 808 nm irradiation as photodynamic *** contribution presented a kind of novel CDs with dual-functions,which can potentially regulate ROS under different conditions.

关键词： Reactive oxygen species regulation Tellurium Carbon quantum dots Scavenge free-radical Photodynamic effect

来源：评论

学校读者我要写书评

暂无评论

Renormalization group theory for perturbed evolution equations

引用

Physical Review E 2002年第4期66卷 046625-046625页

作者： Tao Tu G. Cheng Laboratory of Quantum Communication and Quantum Computation University of Science and Technology of China Hefei 230026 People’s Republic of China CCAST(World Laboratory) P. O. Box 8730 Beijing People’s Republic of China Department of Astronomy and Applied Physics University of Science and Technology of China Hefei 230026 People’s Republic of China

We show that proto-RG (renormaliation group) theory can be used to give a systematic description of the evolution of soltion of perturbed equations. The equations describing the deformation of its shape as the effect of perturbation are proto-RG equations. The RG approach may be simpler than inverse scattering theory (IST) and another approaches, because it dose not rely on any knowledge of IST. It is very concise and easy to understand.

关键词： Nonlinear equations

来源：评论

学校读者我要写书评

暂无评论

Berry curvature as a lower bound for multiparameter estimation

引用

Physical Review A 2016年第4期93卷 042115-042115页

作者： Wei Guo Wei Zhong Xiao-Xing Jing Li-Bin Fu Xiaoguang Wang State Key Laboratory of Modern Optical Instrumentation Department of Physics Zhejiang University Hangzhou 310027 China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials SPTE South China Normal University Guangzhou 510006 China Department of Physics Zhejiang Institute of Modern Physics Zhejiang University Hangzhou 310027 China National Key Laboratory of Science and Technology on Computation Physics Institute of Applied Physics and Computational Mathematics Beijing 100088 China

Quantum Fisher information (QFI) is a key concept in quantum state estimation, and Berry curvature (BC) is another basic concept to describe geometric properties of quantum states. In this paper, we consider pure states undergoing unitary parametrization processes and show that the BC serves as a lower bound for the product of QFIs corresponding to two different parameters through the Heisenberg uncertainty relation. This relation between QFI and BC implies that the estimation precisions of two different parameters are mutually restrictive due to finite BC, and the notion of QFI squeezing is introduced. A scenario of general su(2) parametrization is considered in detail to verify the relation between the QFI and BC.

关键词： Geometric & topological phases Quantum parameter estimation

来源：评论

学校读者我要写书评

暂无评论

Nonlocal Effects on Magnetism in the Diluted Magnetic Semiconductor Ga1−xMnxAs

引用

Physical Review Letters 2010年第3期104卷 037201-037201页

作者： Unjong Yu Abdol-Madjid Nili Karlis Mikelsons Brian Moritz Juana Moreno Mark Jarrell Department of Physics and Astronomy & Center for Computation and Technology Louisiana State University Baton Rouge Louisiana 70803 USA Department of Applied Physics Gwangju Institute of Science and Technology Gwangju 500-712 Korea Department of Physics University of Cincinnati Cincinnati Ohio 45221 USA Stanford Institute for Materials and Energy Science SLAC National Accelerator Laboratory and Stanford University Stanford California 94305 USA

The magnetic properties of the diluted magnetic semiconductor Ga1−xMnxAs are studied within the dynamical cluster approximation. We use the k·p Hamiltonian to describe the electronic structure of GaAs with spin-orbit coupling and strain effects. We show that nonlocal effects are essential for explaining the experimentally observed transition temperature and saturation magnetization. We also demonstrate that the cluster anisotropy is very strong and induces rotational frustration and a cube-edge direction magnetic anisotropy at low temperature. With this, we explain the temperature-driven spin reorientation in this system.

关键词： Temperature

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：