Search

Your search keyword '"LIU Ya-Lin"' showing total 125 results
Start Over Author "LIU Ya-Lin"
125 results on '"LIU Ya-Lin"'

13. Study on transmission characteristics and factors influencing T-elbow aerodynamic noise in ventilation and air-conditioning pipelines.

Author

Liu, Ya Lin, Wang, Ke, and Zhao, Lei

Subjects
AERODYNAMIC noise, COMPUTATIONAL fluid dynamics, AIR conditioning, VENTILATION, ACOUSTIC intensity, VORTEX motion, AIR flow, NATURAL gas pipelines
Abstract

Local ductwork components, such as shunt T-elbows, generate aerodynamic noise in ventilation and air-conditioning systems where turbulent air flow dissipates pulsation. The noise generated by airflow propagates along the ductwork to the end that terminates into a room. The incident acoustic energy may affect the working efficiency and health of the occupants. In this study, computational fluid dynamics and acoustic finite element methods were used to solve the Lighthill acoustic equation and simulate the flow field through T-elbows and the noise field generated by the airflow. The goal is to explore generation and transmission of aerodynamic noise through ductwork in a ventilation and air-conditioning system. The effects of inflow velocity, flow distribution ratio and T-elbow geometry on the noise intensity and acoustic energy propagation were investigated. The results show that low-frequency noises at the branch of the T-elbow are dominant and are caused by local unsteady vortex motion when the air flow diverges rapidly. In addition, the noise intensity and the propagated acoustic energy vary with the inflow velocity, branch flow rate ratio and branch geometry. Finally, the optimal structure for reducing noise in specific conditions can be determined by analysing and comparing various T-elbow geometries. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

16. Long Persistent Luminescence in The Infrared

Author

苑佳琪 Yuan Jia-qi, 刘 峰 Liu Feng, 翁维易 Weng Wei-yi, 于雅淳 Yu Ya-chun, 杨 峰 Yang Feng, 杨 慧 Yang Hui, 刘娅琳 Liu Ya-lin, and 王笑军 Wang Xiao-jun

Subjects
Radiation, Materials science, Persistent luminescence, Infrared, business.industry, Optoelectronics, Condensed Matter Physics, business, Electronic, Optical and Magnetic Materials
Published
2018

22. Predictors of 1-year mortality in patients on prolonged mechanical ventilation after surgery in intensive care unit: a multicenter, retrospective cohort study

Author

Sun, Yue-ming, primary, Li, Shuangling, additional, Wang, Shu-Peng, additional, Li, Chen, additional, Li, Gang, additional, Xu, Jia-Xuan, additional, Wang, Hong-Zhi, additional, Liu, Fei, additional, Yao, Gai-Qi, additional, Chang, Zhi-Gang, additional, Liu, Ya-Lin, additional, Shang, Mei-Xia, additional, and Wang, Dong-xin, additional

Published
2019
Full Text
View/download PDF

24. Two new sesquiterpenoid glycosides from the stems of Zanthoxylum armatum DC

Author

Liu, Ya-Lin, Gao, Liang-Liang, Song, Tong-Tong, Guo, Tao, and Chang, Jun

Abstract

Two new sesquiterpenoid glycosides as dihydrophaseic acid 4′-O-[6″-O-(4″′-hydroxy-3″′, 5″′-dimethoxy) benzoyl)]-β-D-glucopyranoside (1) and dihydrophaseic acid 4′-O-[6″-O-(3″′-methoxy- 4″′-hydroxy) benzoyl)]-β-D-glucopyranoside (2), were isolated from the stems of Zanthoxylum armatum in the study. The compound 1 and 2 showed moderate scavenging activity in DPPH free radical assay with IC50 values of 241 and 264 μM, respectively.

Published
2019
Full Text
View/download PDF

25. A new ent-kaurane diterpene from Isodon henryi.

Author

Jiang, Xue, Zhang, Ling-Xia, Feng, Qing-Mei, Wu, Hong, Liu, Ya-Lin, Wang, De-Qin, Dai, Li-Ping, and Wang, Zhi-Min

Subjects
DITERPENES, ETHYL acetate, MOLECULAR structure, CIRCULAR dichroism, CELL lines
Abstract

One new ent-Kaurane diterpenoid (1) was isolated from the ethyl acetate fraction of Isodon henryi. Along with ten diterpenoids (2–11) were isolated from this plant for the first time, including six 7,20-epoxy diterpenoids, three enmenol-type diterpenoids and one 6,7-seco-ent-kaurene diterpenoid. Their structures were elucidated by 1 D and 2 D NMR, confirmed by HRESIMS and electronic circular dichroism analyses. Furthermore, the cytotoxicities of twelve compounds were investigated in five human cancer cell lines, including A2780, BGC-823, HCT-116, HepG2 and HeLa. And the IC50 values of these diterpenoids ranged from 2.1 to 88.8 μM in the tested cell lines. Based on the molecular structures of 12 compounds and the bioassay results, it suggests that α,β-unsaturated pentanone is the cytotoxic active site of 7,20 epoxy ent-kaurane diterpenoid, but it does not contribute much to enmenol-type diterpenoid. Supplemental data for this article can be accessed at . Supplemental data for this article can be accessed at . [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

28. Two new sesquiterpenoid glycosides from the stems of Zanthoxylum armatum DC.

Author

Liu, Ya-Lin, Gao, Liang-Liang, Song, Tong-Tong, Guo, Tao, and Chang, Jun

Subjects
ZANTHOXYLUM, GLYCOSIDES, FREE radicals
Abstract

Two new sesquiterpenoid glycosides as dihydrophaseic acid 4′-O-[6″-O-(4″′-hydroxy-3″′, 5″′-dimethoxy) benzoyl)]-β-D-glucopyranoside (1) and dihydrophaseic acid 4′-O-[6″-O-(3″′-methoxy- 4″′-hydroxy) benzoyl)]-β-D-glucopyranoside (2), were isolated from the stems of Zanthoxylum armatum in the study. The compound 1 and 2 showed moderate scavenging activity in DPPH free radical assay with IC50 values of 241 and 264 μM, respectively. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

31. Long Persistent Luminescence in The Infrared

Author

LIU Feng, 刘 峰, primary, YANG Feng, 杨 峰, additional, YANG Hui, 杨 慧, additional, YUAN Jia-qi, 苑佳琪, additional, WENG Wei-yi, 翁维易, additional, YU Ya-chun, 于雅淳, additional, LIU Ya-lin, 刘娅琳, additional, and WANG Xiao-jun, 王笑军, additional

Published
2018
Full Text
View/download PDF

46. An N-, C-terminally truncated basic fibroblast growth factor and LPD (liposome-polycation-DNA) complex elicits a protective immune response against murine colon carcinoma

Author

Zhang, Xiao-ping, primary, Yang, Li, additional, Shi, Hua-shan, additional, Zhao, Xia, additional, Deng, Hong Xin, additional, Xiao, Wen-jing, additional, Mao, Yong-qiu, additional, Kan, Bing, additional, Liu, Ya-lin, additional, Zhang, Shuang, additional, Li, Zhi-mian, additional, Zhang, Jing, additional, and Wei, Yu-quan, additional

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results