Search

Your search keyword '"Li, Xiao‐Gang"' showing total 896 results
Start Over Author "Li, Xiao‐Gang"
896 results on '"Li, Xiao‐Gang"'

12. Implementation of a 46-node quantum metropolitan area network

Author

Chen, Teng-Yun, Jiang, Xiao, Tang, Shi-Biao, Zhou, Lei, Yuan, Xiao, Zhou, Hongyi, Wang, Jian, Liu, Yang, Chen, Luo-Kan, Liu, Wei-Yue, Zhang, Hong-Fei, Cui, Ke, Liang, Hao, Li, Xiao-Gang, Mao, Yingqiu, Wang, Liu-Jun, Feng, Si-Bo, Chen, Qing, Zhang, Qiang, Li, Li, Liu, Nai-Le, Peng, Cheng-Zhi, Ma, Xiongfeng, Zhao, Yong, and Pan, Jian-Wei

Subjects
Quantum Physics
Abstract

Quantum key distribution (QKD) enables secure key exchanges between two remote users. The ultimate goal of secure communication is to establish a global quantum network. The existing field tests suggest that quantum networks are feasible. To achieve a practical quantum network, we need to overcome several challenges, including realising versatile topologies for large scales, simple network maintenance, extendable configuration, and robustness to node failures. To this end, we present a field operation of a quantum metropolitan-area network with 46 nodes and show that all these challenges can be overcome with cutting-edge quantum technologies. In particular, we realise different topological structures and continuously run the network for 31 months, by employing standard equipment for network maintenance with an extendable configuration. We realise QKD pairing and key management with a sophisticated key control center. In this implementation, the final keys have been used for secure communication such as real-time voice telephone, text messaging, and file transmission with one-time pad encryption, which can support 11 pairs of users to make audio calls simultaneously. Combined with inter-city quantum backbone and ground-satellite links, our metropolitan implementation paves the way toward a global quantum network., Comment: 14 pages, 5 figures

Published
2021
Full Text
View/download PDF

24. Effect of Microalloying Element Composite Adjustment on the Corrosion Resistance of Q345qE Bridge Steel

Author

YUAN Hao, LI Xue-dong, CHENG Bing-gui, LIU Chao, YANG Shu-feng, LI Xiao-gang

Subjects
q345qe, microalloying element, adjustment, corrosion resistance, Materials of engineering and construction. Mechanics of materials, TA401-492, Technology
Abstract

In order to investigate the effect of microalloying element composite adjustment on the corrosion resistance of Q345qE bridge steel, the influences of alloy element Cr, Ni, and Cu composite adjustment on the corrosion resistance of Q345qE bridge steel were studied by confocal laser scanning microscopy (CLSM), electrochemical workstation, field emission scanning electron microscopy (FE-SEM), and X-ray diffraction (XRD). Results showed that the compactness and protectiveness of the rust layer were improved after the composite adjustment of Cr, Ni and Cu microalloying elements. The Cr element in the rust layer on the Q345qE bridge steel surface could be enriched in the inner rust layer, which effectively blocked the penetration and transmission of corrosive ions such as Cl- and enhanced the protective ability of the rust layer on the substrate. After alloying element adjustment, the proportion of α-FeOOH that was more stable than γ-FeOOH in the rust layer of Q345qENH steel increased. Generally, Q345qE bridge steel with composite adjustment by microalloying elements possessed better corrosion resistance compared to ordinary Q345qE in 3.5% NaCl solution.

Published
2023
Full Text
View/download PDF

41. Genomic characterization of a bla KPC-2–producing IncM2 plasmid harboring transposon ΔTn 6296 in Klebsiella michiganensis.

Author

Song, Jian-Mei, Long, Hu-Bo, Ye, Mei, Yang, Bao-Rui, Wu, Guang-Juan, He, Hong-Chun, Wang, Jun-Ling, Li, Hong-Wei, Li, Xiao-Gang, Deng, De-Yao, Li, Bo, and Yuan, Wen-Li

Subjects
CARBAPENEM-resistant bacteria, PULSED-field gel electrophoresis, SOUTHERN blot, WHOLE genome sequencing, ESCHERICHIA coli
Abstract

Klebsiella michiganensis is an emerging hospital-acquired bacterial pathogen, particularly strains harboring plasmid-mediated carbapenemase genes. Here, we recovered and characterized a multidrug-resistant strain, bla KPC-2–producing Klebsiella michiganensis LS81, which was isolated from the abdominal drainage fluid of a clinical patient in China, and further characterized the co-harboring plasmid. K. michiganensis LS81 tested positive for the bla KPC-2 genes by PCR sequencing, with bla KPC-2 located on a plasmid as confirmed by S1 nuclease pulsed-field gel electrophoresis combined with Southern blotting. In the transconjugants, the bla KPC-2 genes were successfully transferred to the recipient strain E. coli EC600. Whole-genome sequencing and bioinformatics analysis confirmed that this strain belongs to sequence type 196 (ST196), with a complete genome comprising a 5,926,662bp circular chromosome and an 81,451bp IncM2 plasmid encoding bla KPC-2 (designated pLS81-KPC). The IncM2 plasmid carried multiple β-lactamase genes such as bla TEM-1B, bla CTX-M-3, and bla KPC-2 inserted in truncated Tn 6296 with the distinctive core structure IS Kpn27 – bla KPC-2–IS Kpn6. A comparison with 46 K. michiganensis genomes available in the NCBI database revealed that the closest phylogenetic relative of K. michiganensis LS81 is a clinical isolate from a wound swab in the United Kingdom. Ultimately, the pan-genomic analysis unveiled a substantial accessory genome within the strain, alongside significant genomic plasticity within the K. michiganensis species, emphasizing the necessity for continuous surveillance of this pathogen in clinical environments. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results