Search

Your search keyword '"Li, Youxin"' showing total 537 results
Start Over Author "Li, Youxin"
537 results on '"Li, Youxin"'

10. Fog Seal and Mastic Seal

Author

Li, Feng, Feng, Jinyan, Li, Youxin, Zhou, Siqi, Roess, Roger P., Series Editor, Li, Feng, Feng, Jinyan, Li, Youxin, and Zhou, Siqi

Published
2021
Full Text
View/download PDF

15. Chip Seal and Fiber Seal

Author

Li, Feng, Feng, Jinyan, Li, Youxin, Zhou, Siqi, Roess, Roger P., Series Editor, Li, Feng, Feng, Jinyan, Li, Youxin, and Zhou, Siqi

Published
2021
Full Text
View/download PDF

44. Analysis and Treatment of Flue Duct Vibration of 1000MW Generator Set with High Load

Author

Wang Lipeng, An Jingxue, Cheng Jinwu, Li Youxin, and Wang Lei

Subjects
Environmental sciences, GE1-350
Abstract

In view of the serious flue duct vibration problem of the outlet of a 1000MW unit with a load of 80%BRL and above, combined the vibration test with the calculation of the acoustic standing wave frequency, the cause of the flue duct vibration was analyzed and determined. A modification plan is proposed to install clapboards to change the standing wave frequency of the flue duct and keep it away from the measured resonance frequency. After the clapboards are installed, the flue duct vibration frequency of the induced draft fan outlet is dispersed from the two main frequencies of 61.3Hz and 61.4Hz before the clapboards were installed to 6.88Hz~204Hz; the maximum amplitude of the flue duct is reduced from 105.0μm to 12.6μm, and the problem of the flue duct vibration is fundamentally solved. This case provides a new idea for solving the problem of vibration of the flue duct in the large-scale power station boiler.

Published
2022
Full Text
View/download PDF

48. Folic acid-modified reverse micelle-lipid nanocapsules overcome intestinal barriers and improve the oral delivery of peptides.

Author

He, Jibiao, Ding, Ruihuan, Tao, Yuping, Zhao, Zhenyu, Yuan, Ranran, Zhang, Houqian, Wang, Aiping, Sun, Kaoxiang, Li, Youxin, and Shi, Yanan

Subjects
NANOCAPSULES, BIOAVAILABILITY, ORAL drug administration, FOLIC acid, SMALL intestine, INTESTINAL absorption, TYPE 2 diabetes
Abstract

The oral absorption of exenatide, a type 2 diabetes medication, can be increased by employing lipid nanocapsules (LNC). To increase mucus permeability and exenatide intestinal absorption, reverse micelle lipid nanocapsules (RM-LNC) were prepared and their surface was modified with DSPE-PEG-FA. The RM-LNC with surface modification of DSPE-PEG-FA (FA-RM-LNC) were able to target enterocytes and reduce mucus aggregation in the intestine. Furthermore, in vitro absorption at different intestinal sites and flip-flop intestinal loop experiments revealed that LNCs with surface modification significantly increased their absorption efficiency in the small intestine. FA-RM-LNC delivers more drugs into Caco-2 cells via caveolin-, macrophagocytosis-, and lipid raft-mediated endocytosis. Additionally, the enhanced transport capacity of FA-RM-LNC was observed in a study of monolayer transport in Caco-2 cells. The oral administration of exenatide FA-RM-LNC resulted in a prolonged duration of hypoglycemia in diabetic mice and a relative bioavailability (BR) of up to 7.5% in rats. In conclusion, FA-RM-LNC can target enterocytes and has promising potential as a nanocarrier for the oral delivery of peptides. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

49. Cement pavement void detection algorithm based on GPR signal and continuous wavelet transform method

Author

Yu qiuqin, Li youxin, Luo tingyi, Jun Zhang, Tao liang, Zhu xin, Luo liufen, Xu xinxin, and Zhang Yun

Abstract

The dimension of the void area in pavement is crucial to its structural safety. However, there is no effective method to measure its geometric parameters. To address this issue, a void size extraction algorithm based on the continuous wavelet transform (CWT) method was proposed using ground-penetrating radar (GPR) signal. Firstly, the Finite-Difference Time-Domain (FDTD) method was used to investigate void areas with different shapes, sizes, and depths. Next, the GPR signal was processed using the CWT method, and a 3D image of the CWT result was used to visualize the void area. Based on the differences between the void and normal pavement in the time and frequency domains, the signal with maximum energy at the CWT time-frequency result was extracted and combined to reconstruct the B-scan image, where void areas have energy concentration phenomenon, which represent the location of the void area. And width and depth of void detection algorithm was proposed to recognize the energy concentration area. Finally, the detection algorithm was verified both in numerical model and physical lab model. The results indicated that the CWT time-frequency energy spectrum can be used to enhance the void feature, and the 3D CWT image can clearly visualize the void area with a highlighted energy area. After fully testing and validating in numerical and lab models, our proposed method achieved high accuracy for void width and depth extraction, providing a precise method for estimating void dimension in pavement. This method can guide DOT departments to carry out pre-maintenance, thereby ensuring pavement safety.

Published
2023

Catalog

Books, media, physical & digital resources
See catalog results