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1,447 results on '"Cao, An‐Min"'

2. Hollow Multishelled Structure: Synthesis Chemistry and Application

Author

Mao, Dan, Wang, Chao, Li, Wei, Zhou, Liang, Liu, Jian, Zheng, Zijian, Zhao, Yong, Cao, An-min, Wang, Shutao, Huang, Jiaxing, Huo, Fengwei, Chen, Hongyu, Mai, Liqiang, Yu, Ranbo, Wang, Lianzhou, Lu, Yunfeng, Yu, Chengzhong, Yang, Qihua, Yang, Zhenzhong, Zeng, Hua Chun, Zhao, Huijun, Tang, Zhiyong, Zhao, Dongyuan, and Wang, Dan

Published
2024
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4. Hash Food Image Retrieval Based on Enhanced Vision Transformer

Author

CAO Pindan, MIN Weiqing, SONG Jiajun, SHENG Guorui, YANG Yancun, WANG Lili, JIANG Shuqiang

Subjects
food image retrieval, food computing, hash retrieval, vision transformer network, deep hash learning, Food processing and manufacture, TP368-456
Abstract

Food image retrieval, a major task in food computing, has garnered extensive attention in recent years. However, it faces two primary challenges. First, food images exhibit fine-grained characteristics, implying that visual differences between different food categories may be subtle and often can only be observable in local regions of the image. Second, food images contain abundant semantic information, such as ingredients and cooking methods, whose extraction and utilization are crucial for enhancing the retrieval performance. To address these issues, this paper proposes an enhanced ViT hash network (EVHNet) based on a pre-trained Vision Transformer (ViT) model. Given the fine-grained nature of food images, a local feature enhancement module enabling the network to learn more representative features was designed in EVHNet based on convolutional structure. To better leverage the semantic information in food images, an aggregated semantic feature module aggregating the information based on class token features was designed in EVHNet. The proposed EVHNet model was evaluated under three popular hash image retrieval frameworks, namely greedy hash (GreedyHash), central similarity quantization (CSQ), and deep polarized network (DPN), and compared with four mainstream network models, AlexNet, ResNet50, ViT-B_32, and ViT-B_16. Experimental results on the Food-101, Vireo Food-172, and UEC Food-256 food datasets demonstrated that the EVHNet model outperformed other models in terms of comprehensive retrieval accuracy.

Published
2024
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10. Quantum coherence and distribution of N-partite bosonic fields in noninertial frame

Author

Wu, Shu-Min, Zeng, Hao-Sheng, and Cao, Hui-Min

Subjects
Quantum Physics, General Relativity and Quantum Cosmology
Abstract

We study the quantum coherence and its distribution of N-partite GHZ and W states of bosonic fields in the noninertial frames with arbitrary number of acceleration observers. We find that the coherence of both GHZ and W state reduces with accelerations and freezes in the limit of infinite accelerations. The freezing value of coherence depends on the number of accelerated observers. The coherence of N-partite GHZ state is genuinely global and no coherence exists in any subsystems. For the N-partite W state, however, the coherence is essentially bipartite types, and the total coherence is equal to the sum of coherence of all the bipartite subsystems.

Published
2022
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16. A long-lived compact jet in the black hole X-ray binary candidate AT2019wey

Author

Cao, Hong-Min, Migliori, Giulia, Giroletti, Marcello, Frey, Sándor, Yang, Jun, Gabányi, Krisztina É., Cui, Lang, An, Tao, Hong, Xiao-Yu, and Zhang, Wen-Da

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

AT2019wey is a transient discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey in December of 2019. Follow-up optical, radio, and X-ray observations led to classification of this source as a Galactic black hole X-ray binary. We carried out one-epoch 6.7 GHz European VLBI (Very Long Baseline Interferometry) Network (EVN) and two-epoch multiple-frequency (1.6, 4.5, 6.7 GHz) Very Long Baseline Array (VLBA) observations within a year after its discovery. These observations reveal a fading and flat-spectrum radio source with no discernible motion. These features suggest the detection of a compact jet. The source appears resolved at milliarcsecond scales, and the source angular size versus frequency trend is consistent with scatter broadening. This allows us to constrain the lower limit of the source distance to 6 kpc, if the scattering medium is in a Galactic spiral arm. For a source location larger than 3 kpc, the estimated upper limit of the peculiar velocity, relative to the local standard of rest, suggests the asymmetric natal kick may have occurred during the black hole formation stage., Comment: pages 9, 4 figures, A&A accepted for publication

Published
2021
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27. Multi-branch decision point generation strategy for parallel simulation

Author

YANG Fan, CAO Zhi-min, JIA Zhen, WU Zhang-hua

Subjects
parallel simulation, multi-branch simulation, decision point, Military Science
Abstract

In the parallel simulation deducing based on real-time situation, the uncertainty of battlefield requires the ability of multi-branch simulation. In the process of multi-branch extension, the generation of related branches is realized by the traction of decision points. The traditional decision point selection depends on expert system, which is difficult to meet the requirement of parallel simulation on the efficiency of decision point generation. This paper analyzes the difference between off-line multi-branch inference and real-time multi-branch inference, and proposes a parallel simulation-oriented decision point generation strategy. Based on case-based reasoning, decision points are quickly determined and generated to realize real-time multi-branch inference, which reduces the generation of some invalid branches and guarantees the credibility and effectiveness of multi-branch generation under parallel simulation.

Published
2023
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31. Research progress on prediction of postoperative intraocular lens position

Author

Hu, Jun, Zhang, Wan-Ping, Cao, Dan-Min, and Lei, Qiong

Subjects
Learning strategies, Cataract -- Surgery, Health
Abstract

Byline: Jun. Hu, Wan-Ping. Zhang, Dan-Min. Cao, Qiong. Lei With the progress in refractive cataract surgery, more intraocular lens (IOL) power formulas have been introduced with the aim of reducing [...]

Published
2024

38. The loud and the quiet: searching for radio counterparts of two radio-weak BL Lac candidates with VLBI

Author

Cao, Hong-Min, Frey, Sándor, Gabányi, Krisztina É., Yang, Jun, Cui, Lang, Hong, Xiao-Yu, and An, Tao

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract

BL Lac objects are known to have compact jets inclined to our line of sight at a small angle, showing prominent radio emission. Two radio-weak BL Lac candidates with no counterparts in current radio surveys were recently reported by Massaro et al. (2017). Both sources were selected as candidate low-energy counterparts of unassociated Fermi {\gamma}-ray sources. We carried out very long baseline interferometry (VLBI) observations with the European VLBI Network (EVN) at 5 GHz to explore their radio properties at milli-arcsecond (mas) scale. One target, J1410+7405, is clearly detected with the EVN. Its measured 5-GHz flux density, 2.4 mJy, is consistent with recent interferometric measurements with the Karl G. Jansky Very Large Array, suggesting that the radio emission is confined to the inner < ~10 mas region. J1410+7405 is therefore identified as a radio-loud jetted active galactic nucleus, and its brightness temperature exceeds ~10^9 K. Its properties are similar to those of other {\gamma}-ray detected BL Lac objects. On the other hand, the second target, J0644+6031, remains undetected with the EVN with a 6-{\sigma} brightness upper limit of 0.12 mJy/beam. This source is thus radio-quiet, confirming its peculiarity, or possibly questioning its BL Lac nature., Comment: 6 pages, 2 figures, MNRAS Letter accepted

Published
2018
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45. Constructing an Asymmetric Covalent Triazine Framework to Boost the Efficiency and Selectivity of Visible‐Light‐Driven CO2 Photoreduction

Author

Qi, Guang‐Dong, primary, Ba, Dan, additional, Zhang, Yu‐Jie, additional, Jiang, Xue‐Qing, additional, Chen, Zihao, additional, Yang, Miao‐Miao, additional, Cao, Jia‐Min, additional, Dong, Wen‐Wen, additional, Zhao, Jun, additional, Li, Dong‐Sheng, additional, and Zhang, Qichun, additional

Published
2024
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