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373 results on '"Li, Shubin"'

7. 3D Monitoring Model for Real-Time Displacement of Metro Tunnel under 'Dual Carbon' Background

Author

Chai, Jianyong, Jia, Limin, Cao, Jian, Liu, Jianfeng, Chen, Zhe, Li, Shubin, and Wang, Xuejuan

Subjects
Information accessibility, Sustainable development -- Case studies -- Models, Ecological footprint -- Case studies -- Models, Railroad tunnels -- Case studies -- Models, Air quality management -- Case studies -- Models, Emissions (Pollution) -- Case studies -- Models, Information management -- Case studies -- Models
Abstract

Real-time automatic displacement monitoring of metro tunnels is vital for ensuring operational safety and contributes to carbon reduction goals by improving system efficiency. This study focuses on key monitoring elements such as displacement, settlement, convergence, and cracking. Through the analysis of continuous monitoring data, a real-time displacement monitoring model for metro tunnels based on robotic total stations is proposed. This model can timely identify potential risks, thereby ensuring the safe operation of tunnels and reducing carbon emissions from unnecessary maintenance operations, thereby reducing the carbon footprint of metro operations. This article takes the Jinan Metro Tunnel Displacement Real-time Monitoring Project in China as a case study and constructs a comprehensive monitoring framework using robotic total stations, intelligent automated deformation monitoring data collectors, and cloud servers. The implementation details of the project, displacement monitoring principles, monitoring system construction, and data analysis processes are elaborated in detail. Taking the monitoring data of Jinan Metro Line 2 from April 1, 2022, to May 31, 2023, as an example, the results show that the tunnel displacement is within the safe range, verifying the practical application value of the method proposed in this paper. It can effectively ensure the safe operation of the metro and promote sustainable development and low-carbon metro construction., Author(s): Jianyong Chai [1,2,3]; Limin Jia (corresponding author) [1]; Jian Cao [4]; Jianfeng Liu [3]; Zhe Chen [5]; Shubin Li [6]; Xuejuan Wang [5]; Hong Han [5] 1. Introduction With [...]

Published
2024
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16. Denser glasses relax faster: Enhanced atomic mobility and anomalous particle displacement under in-situ high pressure compression of metallic glasses

Author

Cornet, Antoine, Garbarino, Gaston, Zontone, Federico, Chushkin, Yuriy, Jacobs, Jeroen, Pineda, Eloi, Deschamps, Thierry, Li, Shubin, Ronca, Alberto, Shen, Jie, Morard, Guillaume, Neuber, Nico, Frey, Maximilian, Busch, Ralf, Gallino, Isabella, Mezouar, Mohamed, Vaughan, Gavin, and Ruta, Beatrice

Published
2023
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32. The synthesis of an amended membrane coated with graphene oxide and dopamine and guanidyl-based modifier and its antifouling properties

Author

Li Dongmei, Li Wenjie, Li Shubin, Zhan Zhiqiang, Liao Junyu, Zhang Tianyue, Liu Xiaoyong, Huang yi, Chen Haiqiang, and Liao Zhicheng

Subjects
amino-modified graphene oxide, antimicrobial behaviors, dopamine and guanidyl based modifier, flux recovery rate, interception performance, pvdf membrane, Environmental technology. Sanitary engineering, TD1-1066
Abstract

The membrane fouling issue has aroused great concern. To improve their antifouling properties, surface grafting with oxidative deposition were employed to amend a polyvinylidene fluoride (PVDF) membrane. The modifiers were amino-modified graphene oxide (AMGO), dopamine (DPA) and 1,3-diaminoguanidine hydrochloride (DAGH). To take bovine serum albumin (BSA, 1 g/l) as an example of organic materials, BSA interception rate and pure water flux recovery rate increased to 93.65% and 66.74%, respectively, while the corresponding values for the original membrane were much lower (72.82% and 31.72%). The optimum synthesis conditions were found to be 1.5 mg/ml of DPA, 1 wt% of DAGH, 2 mg/ml of AMGO, 4 h of DPA oxidation deposition time and 1 h of AMGO grafting time. Many functional groups like C = N, -NH2, C = O and -OH improved the membrane surface hydrophilicity leading to a higher resistance to organic pollution. Dopamine and guanidyl facilitated the antimicrobial performance of the modified membrane, whose antimicrobial rate was up to 96%, while the raw membrane had no antimicrobial activity. The amended membrane possessed 40% higher mechanical strength than the initial one. It could withstand a high pumping suction force. The noteworthy property was that the irreversible fouling rate decreased by 55%. Therefore, the amended membrane could restore its flux much more easily. HIGHLIGHTS The graphene oxide, dopamine and guanidine-based composite modification offered high hydrophilic and antibacterial radicals.; The irreversible pollution rate of the modified membrane decreased by 55%, its pure water flux recovery rate increased by twice and BSA interception rate was around 94%.; The antimicrobial rate of the modified membrane reached 96%, while the original one did not display any antimicrobial behaviors.;

Published
2022
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