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2024

Record 37 of

Title:GLGAT-CFSL: Global–Local Graph Attention Network-Based Cross-Domain Few-Shot Learning for Hyperspectral Image Classification

Author Full Names:Ding, Chen(1); Deng, Zhicong(1); Xu, Yaoyang(1); Zheng, Mengmeng(1); Zhang, Lei(2); Cao, Yu(3); Wei, Wei(2); Zhang, Yanning(2)
Source Title:IEEE Transactions on Geoscience and Remote Sensing
Language:English
Document Type:Journal article (JA)
Abstract:— Few-shot learning (FSL) is an effective approach to address the issue of limited labeled data in hyperspectral image classification (HSIC). However, it overlooks the domain shift between the source domain (SD) and the target domain (TD) in cross-domain tasks. Most existing domain adaptation (DA) methods alleviate the domain shift problem to some extent, but DA methods based on traditional convolutional operators overlook the nonlocal spatial relationships in HSI, while methods based on graph neural networks (GNNs), although effective in leveraging nonlocal spatial information for domain alignment, overly emphasize global relationships, which is disadvantageous for pixel-level classification in HSI. To solve these issues, this article proposes a novel globalp–local graph attention network-based cross-domain FSL (GLGAT-CFSL), which comprehensively reduces domain shift through global-to-local domain alignment. It has the following advantages: 1) an innovative dynamic triplet graph attention network is devised to identify nonlocal spatial relationships in HSI for global graph alignment (GGA) while also addressing common overfitting and oversmoothing issues in GNNs; 2) an ingenious local similarity learning (LSL) strategy is designed after global domain alignment, utilizing intradomain connectivity structures and interdomain node similarities for local DA, promoting cross-domain information propagation and more comprehensive reduction of domain shift; and 3) we propose a novel triaxial dynamic convolutional neural network (TDCNN) as the feature extractor, promoting cross-dimensional interaction between spectral and spatial dimensions, establishing a more generalizable and rich feature representation between the SD and the TD. The experimental results on three HSI datasets demonstrate the superiority and effectiveness of the proposed GLGAT-CFSL. ? 2024 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.
Affiliations:(1) the School of Computer Science and Technology, Shaanxi Key Laboratory of Network Data Analysis and Intelligent Processing, Xi’an Key Laboratory of Big Data and Intelligent Computing, Xi’an University of Posts and Telecommunications, Xi’an; 710121, China; (2) Shaanxi Provincial Key Laboratory of Speech and Image Information Processing, the National Engineering Laboratory for Integrated Aerospace-Ground-Ocean Big Data Application Technology, School of Computer Science, Northwestern Polytechnical University, Xi’an; 710072, China; (3) Xi’an Institute of Optics and Precision Mechanics, the Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi’an; 710119, China
Publication Year:2024
Volume:62
Start Page:1-19
DOI Link:10.1109/TGRS.2024.3407812
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20242516280257
Record 38 of

Title:Experimental Demonstration of Controllable PT and Anti- PT Coupling in a Non-Hermitian Metamaterial

Author Full Names:Li, Chang(1,2); Yang, Ruisheng(1,3,4); Huang, Xinchao(1,5); Fu, Quanhong(1); Fan, Yuancheng(1); Zhang, Fuli(1)
Source Title:Physical Review Letters
Language:English
Document Type:Journal article (JA)
Abstract:Non-Hermiticity has recently emerged as a rapidly developing field due to its exotic characteristics related to open systems, where the dissipation plays a critical role. In the presence of balanced energy gain and loss with environment, the system exhibits parity-time (PT) symmetry, meanwhile as the conjugate counterpart, anti-PT symmetry can be achieved with dissipative coupling within the system. Here, we demonstrate the coherence of complex dissipative coupling can control the transition between PT and anti-PT symmetry in an electromagnetic metamaterial. Notably, the achievement of the anti-PT symmetric phase is independent of variations in dissipation. Furthermore, we observe phase transitions as the system crosses exceptional points in both anti-PT and PT symmetric metamaterial configurations, achieved by manipulating the frequency and dissipation of resonators. This work provides a promising metamaterial design for broader exploration of non-Hermitian physics and practical application with a controllable Hamiltonian. ? 2024 American Physical Society.
Affiliations:(1) Key Laboratory of Light Field Manipulation, Information Acquisition Ministry of Industry and Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China; (2) European Center for Quantum Sciences, CESQ-ISIS, UMR7006, University of Strasbourg, CNRS, Strasbourg, France; (3) Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai; 200092, China; (4) Shanghai Frontiers Science Research Base of Digital Optics, Tongji University, Shanghai; 200092, China; (5) European XFEL GmbH, Holzkoppel 4, Schenefeld; 22869, Germany
Publication Year:2024
Volume:132
Issue:15
Article Number:156601
DOI Link:10.1103/PhysRevLett.132.156601
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20241515902801
Record 39 of

Title:Ultralow-Noise K-Band Soliton Microwave Oscillator Using Optical Frequency Division

Author Full Names:Niu, Rui(1,2,3); Hua, Tian-Peng(2,4); Shen, Zhen(1,2,3); Wang, Yu(1,2,3); Wan, Shuai(1,2,3); Sun, Yu Robert(2,4); Wang, Weiqiang(5,6); Zhao, Wei(5,6); Guo, Guang-Can(1,2,3); Zhang, Wenfu(5,6); Liu, Wen(7); Hu, Shui-Ming(2,3,4); Dong, Chun-Hua(1,2,3)
Source Title:ACS Photonics
Language:English
Document Type:Journal article (JA)
Abstract:Compact, low-noise microwave oscillators are required throughout a wide range of applications such as radar systems, wireless networks, and frequency metrology. Optical frequency division via an optical frequency comb provides a powerful tool for low-noise microwave signal generation. Here, we experimentally demonstrate an optical reference down to 26 GHz frequency division based on the dissipative Kerr soliton comb, which is generated on a CMOS-compatible, high-index doped silica glass platform. The optical reference is generated through two continuous wave lasers locked to an ultralow expansion cavity. The dissipative Kerr soliton comb with a repetition rate of 26 GHz acts as a frequency divider to derive an ultralow-noise microwave oscillator, with a phase noise level of ?101.3 dBc/Hz at a 100 Hz offset frequency and ?132.4 dBc/Hz at a 10 kHz offset frequency. Furthermore, the Allan deviation of the oscillator reaches 6.4 × 10-13 at a 1 s measurement time. Our system is expected to provide an ultralow-noise microwave oscillator for future radar systems and the next generation of wireless networks. ? 2024 American Chemical Society.
Affiliations:(1) CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei; 230026, China; (2) CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei; 230088, China; (3) Hefei National Laboratory, University of Science and Technology of China, Anhui, Hefei; 230088, China; (4) Department of Chemical Physics, University of Science and Technology of China, Hefei; 230026, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, CAS, Xi’an; 710119, China; (6) University of Chinese Academy of Sciences, Beijing; 100049, China; (7) Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei; 230026, China
Publication Year:2024
Volume:11
Issue:4
Start Page:1412-1418
DOI Link:10.1021/acsphotonics.3c01247
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20241215760586
Record 40 of

Title:Signature of room-temperature two-dimensional ferromagnetism in Ta0.67 V0.33 Se2

Author Full Names:Du, Yuhan(1); Ma, Yuanji(1); Zhang, Luo-Zhao(2); Liu, Yiting(1); Zhu, Xun(1); Feng, Qi(1); Zhang, Changjian(1); Wang, Xinyi(3); Wang, Yuxiang(4); Wang, Hongru(5); Meng, Jing(5); Liu, Binglin(1); Wu, Wenbin(1); Meng, Xianghao(1); Shi, Zeping(1); Sun, Lin(5); Zhang, Cheng(4,6); Shi, Xueliang(3,7); Yang, Hai-Bo(3,7); Shen, Hao(1); Zhang, Xiaolei(1); Jin, Qinyuan(1); Cui, Jizhai(2); Mei, Yongfeng(2); Li, Ying(8); Zhang, Shengli(8); Sun, Zhenrong(1,9); Chu, Junhao(5,9,10); Yuan, Xiang(1,9,11,12)
Source Title:Physical Review B
Language:English
Document Type:Journal article (JA)
Abstract:The discovery of ferromagnetism in van der Waals materials attracts intense research interest and holds profound implications for two-dimensional spintronic devices. However, in most cases the Curie temperature of van der Waals ferromagnets is much lower than room temperature, hindering their potential for device applications. In this study we report the discovery of room-temperature ferromagnetism in layered Ta0.67V0.33Se2. The single crystal is synthesized through the partial replacement of tantalum with vanadium. The crystal structure of Ta0.67V0.33Se2 closely resembles that of both 1T-VSe2 and 1T-TaSe2. The resultant Ta0.67V0.33Se2 exhibits a Hall sign reversal at around 60K, with the dominant carrier changing from electron type at higher temperatures to hole type at lower temperatures. The anomalous peak is observed in the longitudinal resistivity near the critical temperature, which is ascribed to the temperature-induced Lifshitz transition. Despite the fact that bulk 1T-VSe2 and 1T-TaSe2 are paramagnetic, Ta0.67V0.33Se2 displays room-temperature ferromagnetism, as evidenced by the hysteresis behavior observed in the field-dependent magnetization. Collective anomalies are observed at about 60K in both magnetization and transport measurements, indicating a strong correlation between electric and magnetic degrees of freedom. Moreover, room-temperature ferromagnetism is confirmed in few-layer Ta0.67V0.33Se2 through magneto-optic Kerr measurements. Our work provides a strategy for accessing two-dimensional high-Curie-temperature magnets, which hold promise for potential applications in spintronic devices. ? 2024 American Physical Society.
Affiliations:(1) State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai; 200241, China; (2) Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai; 200438, China; (3) Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai; 200241, China; (4) State Key Laboratory of Surface Physics, Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai; 200433, China; (5) Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai; 200241, China; (6) Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai; 201210, China; (7) School of Chemistry and Molecular Engineering, East China Normal University, Shanghai; 200062, China; (8) MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'An Jiaotong University, Xi'an; 710049, China; (9) School of Physics and Electronic Science, East China Normal University, Shanghai; 200241, China; (10) Institute of Optoelectronics, Fudan University, Shanghai; 200438, China; (11) Shanghai Center of Brain-Inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai; 200241, China; (12) Chongqing Institute, East China Normal University, Chongqing; 401120, China
Publication Year:2024
Volume:110
Issue:18
Article Number:184427
DOI Link:10.1103/PhysRevB.110.184427
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20244917488694
Record 41 of

Title:Electrically tunable on-chip quantum Deutsch-Jozsa algorithm with lithium niobate metasurfaces

Author Full Names:Li, Haoyu(1,2); Yang, Ruisheng(1,2,3); Zhang, Yinan(4); Dou, Linyuan(1,2); Luo, Yijie(1,2); Liang, Haigang(1,2); Fan, Yuancheng(5); Wei, Zeyong(1,2,3)
Source Title:RSC Advances
Language:English
Document Type:Journal article (JA)
Abstract:Owing to the inherent advantages of parallelism, rapid processing speed, and minimal energy consumption, optical analog computing has witnessed a progressive development. Quantum optical computing exceeds the capabilities of classical computing in terms of computational speed in numerous tasks. However, existing metamaterial-based quantum Deutsch-Jozsa (DJ) algorithm devices have large structural dimensions and are not suitable for miniaturized optical computing systems. Furthermore, most reported on-chip metasurface devices, rendered monofunctional after fabrication, do not possess sophisticated optical systems. In this work, we develop an electrically tunable on-chip DJ algorithm device on a lithium-niobate-on-insulator (LNOI) platform. The on-chip device consists of various etched slots, each with carefully designed size. By applying different external voltages to each individual unit, precise phase redistribution across the device is attainable, enabling the realization of tunable DJ algorithm. Notably, we can determine whether the oracle metasurface yields a constant or balance function by measuring the output electric field. The on-chip device is miniaturized and easy to integrate while enabling functional reconfiguration, which paves the way for numerous applications in optical computing. ? 2024 The Royal Society of Chemistry
Affiliations:(1) Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai; 200092, China; (2) MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai; 200092, China; (3) Shanghai Frontiers Science Research Base of Digital Optics, Tongji University, Shanghai; 200092, China; (4) Institute of Photonic Chips, University of Shanghai for Science and Technology, Shanghai; 200093, China; (5) Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology and School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China
Publication Year:2024
Volume:14
Issue:26
Start Page:18311-18316
DOI Link:10.1039/d4ra02001d
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20242416241100
Record 42 of

Title:Infrared imaging of magnetic octupole domains in non-collinear antiferromagnets

Author Full Names:Wang, Peng(1,2); Xia, Wei(3,4); Shen, Jinhui(1,5); Chen, Yulong(1,5); Peng, Wenzhi(1,5); Zhang, Jiachen(1,5); Pan, Haolin(1,5); Yu, Xuhao(1,5); Liu, Zheng(5,6); Gao, Yang(5,6); Niu, Qian(5,6); Xu, Zhian(3); Yang, Hongtao(7); Guo, Yanfeng(3,4); Hou, Dazhi(1,5)
Source Title:National Science Review
Language:English
Document Type:Journal article (JA)
Abstract:Magnetic structure plays a pivotal role in the functionality of antiferromagnets (AFMs), which not only can be employed to encode digital data but also yields novel phenomena. Despite its growing significance, visualizing the antiferromagnetic domain structure remains a challenge, particularly for non-collinear AFMs. Currently, the observation of magnetic domains in non-collinear antiferromagnetic materials is feasible only in Mn3Sn, underscoring the limitations of existing techniques that necessitate distinct methods for in-plane and out-of-plane magnetic domain imaging. In this study, we present a versatile method for imaging the antiferromagnetic domain structure in a series of non-collinear antiferromagnetic materials by utilizing the anomalous Ettingshausen effect (AEE), which resolves both the magnetic octupole moments parallel and perpendicular to the sample surface. Temperature modulation due to AEE originating from different magnetic domains is measured by lock-in thermography, revealing distinct behaviors of octupole domains in different antiferromagnets. This work delivers an efficient technique for the visualization of magnetic domains in non-collinear AFMs, which enables comprehensive study of the magnetization process at the microscopic level and paves the way for potential advancements in applications. ? The Author(s) 2023. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.
Affiliations:(1) International Center for Quantum Design of Functional Materials (ICQD), School of Emerging Technology, University of Science and Technology of China, Hefei; 230026, China; (2) College of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao; 266061, China; (3) School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; (4) ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai; 201210, China; (5) Department of Physics, University of Science and Technology of China, Hefei; 230026, China; (6) CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei; 230026, China; (7) Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an; 710119, China
Publication Year:2024
Volume:11
Issue:6
Article Number:nwad308
DOI Link:10.1093/nsr/nwad308
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20242016101916
Record 43 of

Title:Differential Cortical Connectivity in Migraine: Insights from High-Density EEG and Steady-State Visual Evoked Potentials

Author Full Names:Abdulhussein, Msallam Abbas(1,2); Aldeen, Ali W.(3,4); Al-Abboodi, Hamid(5,6)
Source Title:Traitement du Signal
Language:English
Document Type:Journal article (JA)
Abstract:This investigation explores cortical connectivity in individuals diagnosed with migraine, employing high-density electroencephalography (HD-EEG) and steady-state visual evoked potentials (SSVEP) to discern distinctions between migraine with aura (MWA) and migraine without aura (MWoA). The cohort comprised 22 participants suffering from migraines, categorized into MWA (13 participants, including 7 females) and MWoA (9 participants, with 5 females), alongside a control group of 19 healthy individuals (8 females), exhibiting no history of migraines. The ages of the migraine and control groups were 29±1 and 27±1 years, respectively. The methodology involved exposing subjects to visual stimuli at frequencies of four Hz and six Hz, each for a duration of 2 seconds, interspersed with inter-stimulus intervals of 1 to 1.5 seconds. The frequencies were presented in a randomized sequence, with each being delivered 100 times. Through the acquisition of EEG data from 128 custom electrode positions, inter- and intra-hemispheric coherence during the interictal phase was meticulously analyzed. It was observed that individuals with migraines exhibited a pronounced reduction in alpha-wave pattern uniformity across both intra- and interhemispheric connections, a phenomenon markedly accentuated in the MWA group. Further, a unique functional connectivity metric derived from HD-EEG data during repeated SSVEP stimulation emerged as a potential biomarker capable of differentiating between MWA and MWoA subjects. Notably, a significant discrepancy in the slope between Block 1 and Block 6 was observed in MWA subjects, highlighting a distinct response irrespective of stimulation frequency. These findings underscore the clinical significance of cortical connectivity measures in understanding migraine pathophysiology and developing targeted treatments. The variation in alpha-band coherence could reflect differential sensory processing and neural communication mechanisms, potentially linked to Cortical Spreading Depression (CSD). Despite the promising insights, the limited sample size underscores the need for cautious interpretation of the results and further research. This study contributes to the body of knowledge on migraine-induced alterations in brain function, paving the way for refined diagnostic and therapeutic strategies. ? 2024 International Information and Engineering Technology Association. All rights reserved.
Affiliations:(1) Department of Biomedical Engineering, College of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin; 300072, China; (2) Faculty of Computer Science and Mathematics, University of Kufa, Najaf; 54001, Iraq; (3) State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an; 710072, China; (4) Department of Materials Engineering, College of Engineering, University of Kufa, Najaf; 54001, Iraq; (5) State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an; 710072, China; (6) Kut Technical Institute, Middle Technical University, Baghdad; 10001, Iraq
Publication Year:2024
Volume:41
Issue:2
Start Page:811-826
DOI Link:10.18280/ts.410222
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20241816026867
Record 44 of

Title:Synergistic Toughening and Strain Releasing Strategy in Metal Halide Perovskite Photovoltaics

Author Full Names:Wang, Chenyun(1); Shang, Chuanzhen(1); Feng, Haoyang(1); Lei, Yudong(2); Qu, Duo(1); Zhou, Bin(1); Zhang, Xinyue(1); Hu, Hanwei(1); Zhang, Yajie(1); Zhang, Zhanfei(3); Li, Bin(3); Bao, Zheng(4); Ye, Fengjun(4); Zheng, Zebang(2); Wang, Zhenhua(1); Sun, Lijie(3); Tu, Yongguang(1)
Source Title:Advanced Functional Materials
Language:English
Document Type:Journal article (JA)
Abstract:Metal halide perovskite with high Young's modulus is prone to form cracks when subjected to mechanical stresses such as bending, twisting, or impacting, ultimately leading to a permanent decline in the performance of their photovoltaic devices. These mechanical properties pose challenges to the durability of long-term service of photovoltaic devices and the production of flexible devices. To address this issue, the poly (lipoic acid-co-Styrene) elastomer is employed to modulate the modulus of perovskite films. The peak force quantitative nanomechanical atomic force microscopy measurements and nanoindentation tests demonstrated a reduction in modulus, with the lower modulus preventing the formation of cracks and defects during deformation. Moreover, this approach also suppressed the non-radiative recombination of perovskite solar cells by leveraging the interaction between functional groups and defects. Through this method, the rigid inverted devices attained a power conversion efficiency of 24.42% alongside remarkable stability. Concurrently, flexible inverted devices achieved a power conversion efficiency of 22.21%. This strategy offers a promising avenue for fabricating flexible perovskite solar cells and enhancing their mechanical durability. ? 2024 Wiley-VCH GmbH.
Affiliations:(1) Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE), MIIT Key Laboratory of Flexible Electronics, Shaanxi Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Shaanxi, Xi'an; 710072, China; (2) State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment, School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi, Xi'an; 710072, China; (3) State Key Laboratory of Space Power Sources, Shanghai Institute of Space Power-Sources, Shanghai; 200245, China; (4) Beijing Solarverse Optoelectronic Technology Co., Ltd, Beijing; 100176, China
Publication Year:2024
Volume:34
Issue:52
Article Number:2410621
DOI Link:10.1002/adfm.202410621
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20243516930154
Record 45 of

Title:Low-Symmetry 2D t-InTe for Polarization-Sensitive UV-Vis-NIR Photodetection

Author Full Names:Zhou, Nan(1,2); Dang, Ziwei(1); Li, Haoran(1); Sun, Zongdong(3); Deng, Shijie(1); Li, Junhao(4); Li, Xiaobo(1,2); Bai, Xiaoxia(1); Xie, Yong(1); Li, Liang(5); Zhai, Tianyou(3,6)
Source Title:Small
Language:English
Document Type:Journal article (JA)
Abstract:Polarization-sensitive photodetection grounded on low-symmetry 2D materials has immense potential in improving detection accuracy, realizing intelligent detection, and enabling multidimensional visual perception, which has promising application prospects in bio-identification, optical communications, near-infrared imaging, radar, military, and security. However, the majority of the reported polarized photodetection are limited by UV–vis response range and low anisotropic photoresponsivity factor, limiting the achievement of high-performance anisotropic photodetection. Herein, 2D t-InTe crystal is introduced into anisotropic systems and developed to realize broadband-response and high-anisotropy-ratio polarized photodetection. Stemming from its narrow band gap and intrinsic low-symmetry lattice characteristic, 2D t-InTe-based photodetector exhibits a UV–vis–NIR broadband photoresponse and significant photoresponsivity anisotropy behavior, with an exceptional in-plane anisotropic factor of 1.81@808?nm laser, surpassing the performance of most reported 2D counterparts. This work expounds the anisotropic structure-activity relationship of 2D t-InTe crystal, and identifies 2D t-InTe as a prospective candidate for high-performance polarization-sensitive optoelectronics, laying the foundation for future multifunctional device applications. ? 2024 Wiley-VCH GmbH.
Affiliations:(1) Shaanxi Joint Key Laboratory of Graphene, School of Advanced Materials and Nanotechnology, Xidian University, Xi'an; 710126, China; (2) Guangzhou Institute of Technology, Xidian University, Guangzhou; 710068, China; (3) State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan; 430074, China; (4) Institute of Information Sensing, Xidian University, Xi'an; 710126, China; (5) Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei; 230031, China; (6) Optics Valley Laboratory, Hubei; 430074, China
Publication Year:2024
Volume:20
Issue:40
Article Number:2400311
DOI Link:10.1002/smll.202400311
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20242216188813
Record 46 of

Title:Formation mechanism of the "Green Above, Brown Below" phenomenon in Yaozhou Kiln Celadon

Author Full Names:Wang, Zhigang(1); Wang, Xiaohu(2,3,4); Chen, Minxiao(5); Zhang, Maolin(5); Wen, Rui(6,7)
Source Title:Journal of the European Ceramic Society
Language:English
Document Type:Journal article (JA)
Abstract:Yaozhou Kiln is a famous ancient center for celadon production in China, located in present-day Shaanxi Province. While analyzing its olive-green celadon produced during the Song Dynasty, a common occurrence of brownish base (foot and bottom) was observed. This phenomenon can also be found in porcelain produced at other kilns in China and Vietnam. However, previous research has not systematically explored the coloration mechanism behind it. Through different analytical methods, coupled with reproduction firing experiments, this paper concludes that the brownish base is attributed to the diffusion of iron from the body and sand cushion into the thinly applied glaze on the base, as well as the crystallization formed by the combination of the sand cushion and the surface glaze. Factors influencing the depth of the brownish color include: (1) the iron content of the body; (2) the thickness of the base glaze; and (3) the sand cushion material. ? 2023 Elsevier Ltd
Affiliations:(1) Dalian University of Technology, School of Optoelectronic Engineering and Instrumentation Science, Liaoning Province, Dalian; 116024, China; (2) Dalian University of Technology, School of Mechanical Engineering, Liaoning Province, Dalian; 116024, China; (3) Dalian University of Technology, State Key Laboratory of High-Performance Precision Manufacturing, Liaoning Province, Dalian; 116024, China; (4) Shandong Key Laboratory of Cultural Heritage Conservation and Archaeological Sciences, Shandong University, Shandong Province, Qingdao; 266200, China; (5) Jingdezhen Ceramic University, Ancient Ceramics Research Center, Jiangxi Province, Jingdezhen; 333001, China; (6) Ministry of Education, Key Laboratory for Cultural Heritage Study and Conservation (Northwest University), Xi'an, China; (7) Research Center for Archaeological Science, Northwest University, Xi'an, China
Publication Year:2024
Volume:44
Issue:5
Start Page:3429-3438
DOI Link:10.1016/j.jeurceramsoc.2023.12.051
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20240115321453
Record 47 of

Title:Automatic identification of factor profiles can be achieved by improved machine learning model

Author Full Names:Xu, Bo(1,2); Huang, Junbo(1,2); Ge, Yi(3); Zhang, Chun(3); Xu, Han(1,2); Wang, Feng(4); Zhao, Huan(1,2); Zhang, Linlin(5); Liu, Jinxing(6,7); Feng, Yinchang(1,2); Shi, Guoliang(1,2)
Source Title:Atmospheric Environment
Language:English
Document Type:Journal article (JA)
Abstract:The identification of factor profiles is a pivotal step in the source apportionment model. Currently, this process heavily relies on human experience, resulting in high subjectivity in the results and requiring a time-consuming procedure. In this study, a pseudo label extra trees classifier model was proposed to facilitate the automated identification of factor profiles. The source profiles serve as domain knowledge to train the model, as they accurately reflect the distinctive characteristics of emission sources. The findings indicate that the recognition rate of seven factors is 94.3%, significantly outperforming four factors (25%), five factors (30%), six factors (60%). Significantly, the model demonstrates its proficiency in determining the optimal number of factors. And the factor profiles identified using this approach demonstrate complete concurrence with manual recognition. For offline datasets, the model is also proficient at identifying factor profiles and exhibits excellent generalization. This approach facilitates the identification of emission sources in intricate environments and advances the model's capacity to automatically discern source categories by utilizing domain knowledge characteristics. ? 2024 Elsevier Ltd
Affiliations:(1) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, Tianjin Key Laboratory of Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China; (2) CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research (CLAER), College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China; (3) Shaanxi Province Environmental Monitoring Center, Xian; 710054, China; (4) School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin; 300384, China; (5) China National Environmental Monitoring Centre, Beijing; 100012, China; (6) State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin Key Laboratory of Air Pollutants Monitoring Technology, School of Precision Instrument and Optoelectronics Engineering, TianJin University, TianJin; 300072, China; (7) Gigantic Technology (TianJin) Co., Ltd, TianJin; 300072, China
Publication Year:2024
Volume:323
Article Number:120407
DOI Link:10.1016/j.atmosenv.2024.120407
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20240815613466
Record 48 of

Title:Double read-out system for the calorimeter of the HERD experiment

Author Full Names:Liu, X.(1,2); Adriani, O.(3,4); Bai, X.H.(5); Bai, Y.L.(5); Bao, T.W.(1); Berti, E.(3); Betti, P.(3,4); Bottai, S.(3); Cao, W.W.(5); Casaus, J.(6); Chen, Z.(5); Cui, X.Z.(1); D’Alessandro, R.(3,4); Dong, Y.W.(1); Formato, V.(7); Gao, J.R.(5); Giovacchini, F.(6); Li, R.(5); Liang, X.Z.(5); Liao, C.L.(1,2); Lu, Y.P.(1); Lyu, L.W.(5); Marin, J.(6); Martinez, G.(6); Mori, N.(3); Pacini, L.(3); Pillera, R.(8); Pizzolotto, C.(9); Qin, J.J.(5); Quan, Z.(1); Shi, D.L.(5); Starodubtsev, O.(3); Tiberio, A.(3,4); Vagelli, V.(10,11); Velasco, M.A.(6); Venere, L.D.(8); Wang, B.(5); Wang, J.J.(1); Wang, L.(5); Wang, R.J.(1); Wang, Z.G.(1); Xu, M.(1); Zampa, G.(9); Zampa, N.(9); Zhang, L.(1); Zheng, J.K.(5)
Source Title:Proceedings of Science
Language:English
Document Type:Conference article (CA)
Conference Title:38th International Cosmic Ray Conference, ICRC 2023
Conference Date:July 26, 2023 - August 3, 2023
Conference Location:Nagoya, Japan
Conference Sponsor:et al.; Institute for Cosmic Ray Research (ICRR) Univeristy of Tokyo; International Union of Pure and Applied Physics (IUPAP); JPS; Nagoya Convention and Visitors Bureau; Nagoya University
Abstract:The High Energy cosmic-Radiation Detection (HERD) facility has been proposed as a space cosmic-ray and gamma-ray detector, which will be installed on the China Space Station around 2027. HERD will be able to measure proton and nuclei fluxes up to the cosmic ray knee region (about 1 PeV), electron + positron flux up to tens of TeV and gamma rays above 100 MeV. The CALO, a homogeneous and 3D segmented calorimeter, is the core detector of HERD. It consists of about 7500 LYSO cubes with 3 cm side length, corresponding to about 55 radiation lengths (X0) and 3 nuclear interaction lengths for centrally incident particles in any direction. The fluorescence light produce by each LYSO cube is read out using two independent systems. The first one uses wavelength shifting fibers to deliver the light to Intensified scientific CMOS(IsCMOS) cameras, whereas the second one makes use of photo-diode sensors. Both systems feature a dynamic range larger than 107. In this paper we will report the status of the CALO hardware and Monte Carlo simulation studies on its performance. ? Copyright owned by the author(s) under the terms of the Creative Commons.
Affiliations:(1) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; 100049, China; (2) University of Chinese Academy of Sciences, Beijing; 101408, China; (3) INFN sezione di Firenze, Sesto Fiorentino, Florence; I-50019, Italy; (4) Department of Physics and Astronomy, University of Florence, Sesto Fiorentino, Florence; I-50019, Italy; (5) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (6) Centro de Investigaciones Energéticas, Medioambientales y Tecnoló gicas (CIEMAT), Madrid; E-28040, Spain; (7) INFN Sezione di Roma Tor Vergata, Roma; 00133, Italy; (8) INFN Sezione di Bari, Bari; 70126, Italy; (9) INFN Sezione di Trieste, Trieste; I-34149, Italy; (10) Agenzia Spaziale Italiana (ASI), Roma; I-00133, Italy; (11) INFN Sezione di Perugia, Perugia; I-06123, Italy
Publication Year:2024
Volume:444
Article Number:097
數(shù)據(jù)庫(kù)ID（收錄號(hào)）:20245117555839

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