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Your search keyword '"Yang, Guangxin"' showing total 313 results
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313 results on '"Yang, Guangxin"'

1. Research on Traffic Flow Prediction and Traffic Light Timing Recommendation Technology Based on Vehicle Data Analysis

Author

Wang, Tong, Xue, Shuyu, Yang, Guangxin, Gao, Shan, Ouyang, Min, Chen, Liwei, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Sun, Yuqing, editor, Lu, Tun, editor, Wang, Tong, editor, Fan, Hongfei, editor, Liu, Dongning, editor, and Du, Bowen, editor

Published
2024
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26. Determination of Free Glycidol and Total Free Monochloropropanediol in Fish and Krill Oil with Simple Aqueous Derivatization and High-Performance Liquid Chromatography–Tandem Mass Spectrometry.

Author

Yang, Guangxin, Tang, Yunyu, Liu, Xiaoxia, Wang, Longlong, Qin, Lixia, Li, Dan, Shen, Xiaosheng, Kong, Cong, Zhai, Wenlei, Fodjo, Essy Kouadio, and Fan, Chengqi

Subjects
KRILL oil, EDIBLE fats & oils, FISH oils, SAMPLING (Process), DIETARY supplements
Abstract

This study introduces a novel method for detecting free glycidol and total free monochloropropanediol (MCPD) in fish and krill oil. Before analysis on high-performance liquid chromatography–tandem mass spectrometry (HPLC-MS), p-(dimethylamino)phenol was used for derivatization of these compounds, enabling the sensitive determination of these contaminants. The sample preparation procedure includes a simple, efficient pretreatment using NaCl aqueous solution extraction and C18 sorbent cleanup (for demulsification), distinguishing glycidol from MCPD under varied reaction conditions for derivatization (weak acidic and strong alkaline aqueous environments). This approach shows broad linearity from 1 to at least 256 ng·mL−1, improved sensitivity compared to standard GC-MS methods, with the limit of detection (LOD) and limit of quantification (LOQ) for MCPD and glycidol in both oil samples verified at 0.5 ng·mL−1 and 1 ng·mL−1, respectively. Different from previous HPLC-MS methods for direct detection of glycidol esters or MCPD esters, this is the first HPLC-MS method used for the detection of free glycidol and total free MCPD in edible oil. Furthermore, this method can be potentially developed for glycidol or monochloropropane diol esters, which is similar to the current official methods adopted for indirect detection of these contaminants in different food matrices. Application of this detection method to real dietary supplements (fish oil and krill oil) revealed MCPD residues in fish oil (maximum detected: 32.78 ng·mL−1) and both MCPD (maximum detected: 2767.3 ng·mL−1) and glycidol (maximum detected: 22.2 ng·mL−1) in krill oil, emphasizing its effectiveness and accuracy for assessing contamination in these supplements. [ABSTRACT FROM AUTHOR]

Published
2024
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40. Triple plasmon-induced transparency and polarization-insensitive optical switch based on monolayer patterned graphene metamaterial.

Author

Liu, Zhimin, Qin, Yipeng, Zhou, Fengqi, Zhuo, Shanshan, Ji, Cheng, Yang, Guangxin, Xie, Yadong, Yang, Ruihan, and Luo, Xin

Subjects
OPTICAL switches, GRAPHENE, METAMATERIALS, FERMI level, OPTOELECTRONIC devices
Abstract

This study introduces a single-layer patterned graphene metamaterial, composed of a graphene ring (GR), two parallel graphene strips (TPGSs), two vertical graphene strips (TVGSs), and a graphene block (GB), which achieves triple plasmon-induced transparency (TPIT) in the terahertz (THz) frequency range using coupled mode theory (CMT) and the finite-difference time-domain (FDTD) technique. Moreover, a synchronized electro-optical switch with four modulation modes is implemented by dynamically adjusting graphene's Fermi level, exhibiting modulation degrees of amplitude (MDA) of 88.3%, 94.7%, 86.9%, and 89.0% at 1.69 THz, 3.14 THz, 3.95 THz, and 4.67 THz, respectively. In addition, the modes excited by TPGSs and TVGSs interconvert due to the proposed structure's symmetry, accounting for the polarization insensitivity of TPIT. The enhanced MDA and polarization insensitivity of the electro-optical switch presented in this study significantly surpass those of comparable electro-optical switches. As a result, the polarization insensitivity of multiple optical switches to incident light fields offers a promising approach for designing optoelectronic devices. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Design and performance evaluation of a multi-disc magnetorheological fluid brake for A00-class minicars.

Author

Yang, Guangxin, Yao, Lan, Dong, Tao, and Wang, Daoming

Subjects
MAGNETORHEOLOGICAL fluids, BRAKE fluids, DISC brakes, THERMAL strain, LOW temperatures, BRAKE systems, THERMAL stresses
Abstract

This paper presents the design and performance evaluation of a multi-disc magnetorheological fluid (MRF)-based brake (MRB) for A00-class minicars. The braking performance of the MRB is studied by means of theoretical analysis and experimental verification. Firstly, the MRB is designed according to the shear model of the MRF, and the structure optimization is carried subsequently. Secondly, multi-physical simulations of the MRB are conducted to investigate the transient temperature field, thermal stress and thermal strain distribution of the MRB under different braking models; Finally, a performance evaluating testbed is built to experimentally assess the braking performance of the MRB. The results indicate that the theoretical braking torque of the MRB fulfills the target value. The thermal strain-induced deformation of the disc is minimal and has a negligible effect on the torque output. In addition, the MRB is experimentally validated to exhibit excellent braking performance in terms of sufficient torque output capacity, rapid response, low temperature rise characteristic, as well as favorable velocity following property. [ABSTRACT FROM AUTHOR]

Published
2024
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50. Evaluation of 3-MCPD content of commonly consumed food in Côte d'Ivoire using bimodal UV-Vis/electrochemistry technique

Author

Aka, Martin Alla, Fodjo, Essy Kouadio, Williams, Irie Bi Irié, Narcisse, Pomi Bi Boussou, Sylvestre, Koffi Koffi Kra, Albert, Trokourey, Yang, Guangxin, and Kong, Cong

Subjects
Materials Science (miscellaneous), Business and International Management, General Agricultural and Biological Sciences, General Business, Management and Accounting, Industrial and Manufacturing Engineering, Colorimetric method, electrochemical method, cysteine modified silver nanostructure, food contaminant, neo-formed contaminant, 3-monochloropropanediol
Abstract

3-monochloropropane-1,2-diol (3-MCPD) is known as one of the neo-formed contaminants widely distributed in foodstuffs, especially in processed foods with high sides effects for human health. In this study, 3-monochloropropane-1,2-diol (3-MCPD) content for eleven (11) different types of foods from local market were evaluated in two ways using: (1) cysteine modified AgNPs (Cys-AgNPs) as functional nanomaterials for UV-Vis technique, and (2) gold-modified by Cys-AgNPs (Cys-AgNPs/Au) in electrochemistry sensor. High concentrations of 3-MCPD were found in most studied samples namely in liquid foods (palm oil and frying oil from tuna fish), fried foods (fried ripe banana, roasted peanut, banana chips, fried tuna and potato fries), smoked mackerel and roasted foods (pork barbecue). The maximum 3-MCPD content were 1085 μg/kg in liquid foods, 582 μg/kg in fried foods, 156 μg/kg in smoked and 716 μg/kg in roasted foods. As exhibited, the level of 3-MCPD in food products on the Ivorian market is relatively higher. This study indicates the importance of monitoring 3-MCPD content in food products for both domestic and industrial processing.

Published
2022

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