检索结果-内蒙古大学图书馆

Temperature-Dependent Decay of Quasi-Two-Dimensional Vortices across the BCS-BEC Crossover

Physical Review Letters 2022年第16期129卷 163602-163602页

作者： Xiang-Pei Liu Xing-Can Yao Xiaopeng Li Yu-Xuan Wang Chun-Jiong Huang Youjin Deng Yu-Ao Chen Jian-Wei Pan Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences University of Science and Technology of China Hefei 230026 China Shanghai Research Center for Quantum Science and CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai 201315 China Hefei National Laboratory University of Science and Technology of China Hefei 230088 China State Key Laboratory of Surface Physics Institute of Nanoelectronics and Quantum Computing and Department of Physics Fudan University Shanghai 200433 China Shanghai Qi Zhi Institute AI Tower Xuhui District Shanghai 200232 China Department of Physics and HKU-UCAS Joint Institute for Theoretical and Computational Physics at Hong Kong The University of Hong Kong Hong Kong China MinJiang Collaborative Center for Theoretical Physics College of Physics and Electronic Information Engineering Minjiang University Fuzhou 350108 China

We systematically study the decay of quasi-two-dimensional vortices in an oblate strongly interacting Fermi gas over a wide interaction range and observe that, as the system temperature is lowered, the vortex lifetime increases in the Bose-Einstein condensate (BEC) regime but decreases at unitarity and in the Bardeen-Cooper-Schrieffer (BCS) regime. The observations can be qualitatively captured by a phenomenological model simply involving diffusion and two-body collisional loss, in which the vortex lifetime is mostly determined by the slower process of the two. In particular, the counterintuitive vortex decay in the BCS regime can be interpreted by considering the competition between the temperature dependence of the vortex annihilation rate and that of unpaired fermions. Our results suggest a competing mechanism for the complex vortex decay dynamics in the BCS-BEC crossover for the fermionic superfluids.

关键词： BEC-BCS crossover Fermi gases Quantum simulation

来源：评论

学校读者我要写书评

暂无评论

Parallel Intelligence Method for Timetable Rescheduling of High-speed Railways under Disturbances

Parallel Intelligence Method for Timetable Rescheduling of H...

引用

Digital Twins and Parallel Intelligence (DTPI), IEEE International Conference on

作者： Xuan Liu Min Zhou Haifeng Song Shigen Gao Chenkun Jin Hairong Dong State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China School of Electronic and Information Engineering Beijing Jiaotong University Beijing China Institute of Computing Technology Academy of Railway Sciences Beijing China

This paper focuses on solving the real-time timetable rescheduling problem for dispatching systems of high-speed railway systems (HSRs) in case of temporary speed restriction by utilizing the parallel intelligence method. We construct a parallel intelligent system framework, which combines the actual and artificial dispatching systems through computational experiments and parallel execution. Then a rescheduling model includes retiming, recording and rerouting, and a solution method based on rolling horizon optimization are both proposed. Finally, a timetable of Beijing-Shanghai HSR within the jurisdiction of the Beijing Railway Bureau based case study indicates that the proposed parallel intelligence method can effectively decrease the total delay.

关键词： Digital twin Conferences Rail transportation Dispatching Real-time systems Data models Delays

来源：评论

学校读者我要写书评

暂无评论

A Study on Sensing Properties of Nickel Protected and Embedded Fiber Bragg Grating Based on Stress Analysis 5

A Study on Sensing Properties of Nickel Protected and Embedd...

引用

5th IEEE International Conference on Computer and Communications, ICCC 2019

作者： Ying, Wang Jianfeng, Xie Wei, Rao Baohong, Liu Renxian, Zeng Cuiping, Zeng Nanchang Institute of Technology Jiangxi Province Key Laboratory of Water Information Cooperative Sensing Intelligent Processing School of Information Engineering NanChang China

ISBN: (数字)9781728147437

ISBN: (纸本)9781728147437

The Fiber Bragg Grating (FBG) sensor was embedded in cement mortar after it was nickel electroplating protected. The stresses on the embedded FBG under varied temperature were analyzed. The temperature sensitivity of embedded FBG was achieved in theory base on stress analysis and verified by experiment. The temperature sensitivity of embedded FBG is 19.2188 pm/°C in theory, while the experiment result is 20.688 pm/°C. A finite element analysis software (ANSYS) was used to simulate the stresses on the embedded FBG. The results of theoretical analysis match the ones from experiments and simulations very well. © 2019 IEEE.

关键词： Stress analysis

来源：评论

学校读者我要写书评

暂无评论

A lightweight edge computing platform designed on embeded system

A lightweight edge computing platform designed on embeded sy...

引用

2019 IEEE International Conference on Signal, information and Data Processing, ICSIDP 2019

作者： Lin, Qin Pan, Ling Jia, Mingquan Liu, Hongwei Wu, Mingqin Zhang, Hao Zhong, Yu Key Laboratory of Agile Intelligent Computing 10th Research Institute of China Electronics Technology Group Corporation Chengdu China

ISBN: (纸本)9781728123455

Edge computing platform is a critical component to form next-generation intelligent equipment. In an effort to support new military and industrial applications with more flexible computing power, a new lightweight edge computing platform is introduced in this paper. This platform is fully based on embedded hardware, such as ARM, DSP and FPGA. Platform's management and scheduling architecture is developed using Go language to minimize code size and dependence on three-party libraries. In addition, the management and scheduling commands transmit across the platform over the Ethernet, while data transmit among computing nodes via the RapidIO network to isolate the commands and data channels. An experimental letter count application was performed to validate the feasibility of the platform and also supply optimization hint with a data throughput test. This work has the potential to reduce developer's experience in parallel and distributed systems, and then the cost and time in development of embedded intelligent equipment. © 2019 IEEE.

关键词： Edge computing

来源：评论

学校读者我要写书评

暂无评论

Customized Conversational Recommender Systems

arXiv

引用

arXiv 2022年

作者： Li, Shuokai Zhu, Yongchun Xie, Ruobing Tang, Zhenwei Zhang, Zhao Zhuang, Fuzhen He, Qing Xiong, Hui Institute of Computing Technology Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China WeChat Search Application Department Tencent China King Abdullah University of Science and Technology Thuwal Saudi Arabia Institute of Artificial Intelligence Beihang University Beijing100191 China Sklsde School of Computer Science Beihang University Beijing100191 China Artificial Intelligence Thrust The Hong Kong University of Science and Technology Guangzhou China The Key Lab of Intelligent Information Processing of Chinese Academy of Sciences China

Conversational recommender systems (CRS) aim to capture user's current intentions and provide recommendations through real-time multi-turn conversational interactions. As a human-machine interactive system, it is essential for CRS to improve the user experience. However, most CRS methods neglect the importance of user experience. In this paper, we propose two key points for CRS to improve the user experience: (1) Speaking like a human, human can speak with different styles according to the current dialogue context. (2) Identifying fine-grained intentions, even for the same utterance, different users have diverse finegrained intentions, which are related to users' inherent preference. Based on the observations, we propose a novel CRS model, coined Customized Conversational Recommender System (CCRS), which customizes CRS model for users from three perspectives. For human-like dialogue services, we propose multi-style dialogue response generator which selects context-aware speaking style for utterance generation. To provide personalized recommendations, we extract user's current fine-grained intentions from dialogue context with the guidance of user's inherent preferences. Finally, to customize the model parameters for each user, we train the model from the meta-learning perspective. Extensive experiments and a series of analyses have shown the superiority of our CCRS on both the recommendation and dialogue service. © 2022, CC BY-SA.

关键词： Recommender systems

来源：评论

学校读者我要写书评

暂无评论

A Novel RFID Authentication Protocol Based on A Block-Order-Modulus Variable Matrix Encryption Algorithm

arXiv

引用

arXiv 2023年

作者： Wang, Yan Liu, Ruiqi Gao, Tong Shu, Feng Lei, Xuemei Wu, Yongpeng Gui, Guan Wang, Jiangzhou School of Information and Communication Engineering Hainan University Haikou570228 China Wireless and Computing Research Institute ZTE Corporation Beijing100029 China College of Electronic Science and Engineering Jilin University Changchun130012 China School of Information and Communication Engineering and Collaborative Innovation Center of Information Technology Hainan University Haikou570228 China School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing210094 China College of Electronic Information Engineering Inner Mongolia University Hohhot010021 China Shanghai Key Laboratory of Navigation and Location Based Services Shanghai Jiao Tong University Minhang Shanghai200240 China College of Telecommunications and Information Engineering Nanjing University of Posts and Telecommunications Nanjing210003 China School of Engineering University of Kent CanterburyCT2 7NT United Kingdom

In this paper, authentication for mobile radio frequency identification (RFID) systems with low-cost tags is studied. Firstly, an adaptive modulus (AM) encryption algorithm is proposed. Subsequently, in order to enhance the security without additional storage of new key matrices, a self-updating encryption order (SUEO) algorithm is designed. Furthermore, a diagonal block local transpose key matrix (DBLTKM) encryption algorithm is presented, which effectively expands the feasible domain of the key space. Based on the above three algorithms, a novel joint AM-SUEO-DBLTKM encryption algorithm is constructed. Making full use of the advantages of the proposed joint algorithm, a two-way RFID authentication protocol, named AM-SUEO-DBLTKM-RFID, is proposed for mobile RFID systems. In addition, the Burrows-Abadi-Needham (BAN) logic and security analysis indicate that the proposed AM-SUEO-DBLTKM-RFID protocol can effectively combat various typical attacks. Numerical results demonstrate that the proposed AM-SUEO-DBLTKM algorithm can save 99.59% of tag storage over traditional algorithms. Finally, the low computational complexity as well as the low storage cost of the proposed AM-SUEO-DBLTKM-RFID protocol facilitates deployment within low-cost RFID tags. Copyright © 2023, The Authors. All rights reserved.

关键词： Authentication

来源：评论

学校读者我要写书评

暂无评论

DHMM-Based Asynchronous Finite-Time Sliding Mode Control for Markovian Jumping Lur’e Systems

Research Square

引用

Research Square 2021年

作者： Nie, Rong Du, Wenli Li, Zhongmei Zhou, Zhao He, Shuping Key Laboratory of Smart Manufacturing in Energy Chemical Process East China University of Science and Technology Ministry of Education Shanghai200237 China Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education School of Electrical Engineering and Automation Anhui University Hefei230601 China School of Electronic Information and Electrical Engineering Chengdu University Chengdu610106 China

This paper is concerned with the asynchronous problem for a class of Markovian jumping Lur’s system (MJLSs) via sliding mode control (SMC) in continuous-time domain. Specifically, the discrete hidden Markovian model (DHMM) is employed to describe the nonsynchronization between the controller modes and the MJLSs modes. In particular, considering the nonlinearity of MJLSs, a novel Lur’e-integral-type sliding surface is constructed. In order to ensure the finite-time stability of sliding mode dynamics and the accessibility of the specified sliding surface, the asynchronous Lur’e-type SMC law of the detector mode is presented. Finally, an example of DC motor is provided to demonstrate the effectiveness of the proposed technique. © 2021, CC BY.

关键词： Sliding mode control

来源：评论

学校读者我要写书评

暂无评论

Measurement of Very-High-Energy Diffuse Gamma-Ray Emissions from the Galactic Plane with LHAASO-WCDA

引用

Physical Review Letters 2025年第8期134卷 081002-081002页

作者： Zhen Cao F. Aharonian Axikegu Y. X. Bai Y. W. Bao D. Bastieri X. J. Bi Y. J. Bi W. Bian Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center Institute of High Energy Physics Chinese Academy of Sciences 100049 Beijing China University of Chinese Academy of Sciences 100049 Beijing China TIANFU Cosmic Ray Research Center Chengdu Sichuan China Dublin Institute for Advanced Studies 31 Fitzwilliam Place 2 Dublin Ireland Max-Planck-Institut for Nuclear Physics P.O. Box 103980 69029 Heidelberg Germany School of Physical Science and Technology & School of Information Science and Technology Southwest Jiaotong University 610031 Chengdu Sichuan China School of Astronomy and Space Science Nanjing University 210023 Nanjing Jiangsu China Center for Astrophysics Guangzhou University 510006 Guangzhou Guangdong China Tsung-Dao Lee Institute & School of Physics and Astronomy Shanghai Jiao Tong University 200240 Shanghai China

The diffuse Galactic gamma-ray emission is a very important tool used to study the propagation and interaction of cosmic rays in the Milky Way. In this Letter, we report the measurements of the diffuse emission from the Galactic plane—covering Galactic longitudes from 15° to 235° and latitudes from −5° to +5°, in an energy range of 1 to 25 TeV—made with the Water Cherenkov Detector Array (WCDA) of the Large High Altitude Air Shower Observatory. After the sky regions of known sources are masked, the diffuse emission is detected with 24.6σ and 9.1σ significance in the inner Galactic plane (15°

关键词： Cosmic rays

来源：评论

学校读者我要写书评

暂无评论

Terahertz Generation via Picosecond Spin-to-Charge Conversion in IrMn3/Ni−Fe Heterojunction

引用

Physical Review Applied 2021年第2期16卷 024058-024058页

作者： Cheng Li Bin Fang Like Zhang Qian Chen Xiangnan Xie Nuo Xu Zhongming Zeng Zhenyu Wang Liang Fang Tian Jiang Institute for Quantum Information & State Key Laboratory of High Performance Computing National University of Defense Technology Changsha 410073 China Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia Suzhou Institute of Nano-Tech and Nano-Bionics CAS Suzhou 215123 China College of Electronic and Information Engineering Wuxi University Wuxi 214105 China National Innovation Institute of Defense Technology Academy of Military Sciences PLA China Beijing 100010 China Beijing Academy of Quantum Information Sciences Beijing 100193 China Beijing Institute for Advanced Studies National University of Defense Technology 100010 China

Experimental investigations of ultrafast electro-optical properties in magnetic materials manifest their great potential for emerging spintronic optoelectronic devices. Here, using time-resolved terahertz emission spectroscopy, we construct a spintronic terahertz emitter consisting of an IrMn3/Ni−Fe heterojunction. A femtosecond spin current pulse is generated in the thin film of the Ni−Fe layer when it absorbs a femtosecond laser pulse, and then the spin current is converted into a transient charge current by the metallic IrMn3 layer on picosecond timescales. We timely record the terahertz emission associated with this ultrafast conversion process by means of electro-optic sampling. Besides, the spin-to-charge conversion efficiency of the IrMn3/Ni−Fe heterojunction is determined via quantitative analysis of the spin torque ferromagnetic resonance results. We have both optically verified and electrically studied the spin-to-charge conversion of the IrMn3/Ni−Fe heterojunction. Our results enlarge the material choice range of spintronic terahertz emitters, which may promote further investigations of ultrafast spin-to-charge conversion in different heterojunction materials.

关键词： Magnetization dynamics Optical sources & detectors Optoelectronics Spin current Spin-orbit coupling Ultrafast magnetic effects Magnetic multilayers Terahertz techniques

来源：评论

学校读者我要写书评

暂无评论

Manipulating the hydrogen-induced insulator-metal transition through artificial microstructure engineering

arXiv

引用

arXiv 2025年

作者： Zhou, Xuanchi Yao, Xiaohui Lu, Wentian Guo, Jinjian Ji, Jiahui Lang, Lili Zhou, Guowei Yao, Chunwei Qiao, Xiaomei Ji, Huihui Yuan, Zhe Xu, Xiaohong Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials Science Shanxi Normal University Taiyuan030031 China Research Institute of Materials Science Shanxi Key Laboratory of Advanced Magnetic Materials and Devices Shanxi Normal University Taiyuan030031 China National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China Interdisciplinary Center for Theoretical Physics and Information Sciences Institute of Nanoelectronic Devices and Quantum Computing Fudan University Shanghai200433 China

Hydrogen-associated filling-controlled Mottronics within electron-correlated system provides a groundbreaking paradigm to explore exotic physical functionality and phenomena. Dynamically controlling hydrogen-induced phase transitions through external fields offers a promising route for designing protonic devices in multidisciplinary fields, but faces high-speed bottlenecks owing to slow bulk diffusion of hydrogens. Here, we present a promising pathway to kinetically expedite hydrogen-related Mott transition in correlated VO2 system by taking advantage of artificial microstructure design. Typically, inclined domain boundary configuration and cR-faceted preferential orientation simultaneously realized in VO2/Al2O3 (1 1¯ 02) heterostructure significantly lower the diffusion barrier via creating an unobstructed conduit for hydrogen diffusion. As a result, the achievable switching speed through hydrogenation outperforms that of counterpart grown on widely-reported c-plane Al2O3 substrate by 2-3 times, with resistive switching concurrently improved by an order of magnitude. Of particular interest, an anomalous uphill hydrogen diffusion observed for VO2 with a highway for hydrogen diffusion fundamentally deviates from basic Fick’s law, unveiling a deterministic role of hydrogen spatial distribution in tailoring electronic state evolution. The present work not only provides a versatile strategy for manipulating ionic evolution, endowing with great potential in designing high-speed protonic devices, but also deepens the understanding of hydrogen-induced Mott transitions in electron-correlated system. © 2025, CC BY.

关键词： Microstructural evolution

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：