Search

Your search keyword '"Zhang, Li-min"' showing total 1,929 results
Start Over Author "Zhang, Li-min"
1,929 results on '"Zhang, Li-min"'

35. Comprehensive Evaluation Model of MOOC Teaching Quality of Accounting Major Based on Rete Algorithm

Author

Zhang, Li-min, Akan, Ozgur, Editorial Board Member, Bellavista, Paolo, Editorial Board Member, Cao, Jiannong, Editorial Board Member, Coulson, Geoffrey, Editorial Board Member, Dressler, Falko, Editorial Board Member, Ferrari, Domenico, Editorial Board Member, Gerla, Mario, Editorial Board Member, Kobayashi, Hisashi, Editorial Board Member, Palazzo, Sergio, Editorial Board Member, Sahni, Sartaj, Editorial Board Member, Shen, Xuemin (Sherman), Editorial Board Member, Stan, Mircea, Editorial Board Member, Jia, Xiaohua, Editorial Board Member, Zomaya, Albert Y., Editorial Board Member, Fu, Weina, editor, Liu, Shuai, editor, and Dai, Jianhua, editor

Published
2021
Full Text
View/download PDF

36. Research on Internal Cost Accounting and Control of Education System Based on Activity Based Costing

Author

Zhang, Li-min, Akan, Ozgur, Editorial Board Member, Bellavista, Paolo, Editorial Board Member, Cao, Jiannong, Editorial Board Member, Coulson, Geoffrey, Editorial Board Member, Dressler, Falko, Editorial Board Member, Ferrari, Domenico, Editorial Board Member, Gerla, Mario, Editorial Board Member, Kobayashi, Hisashi, Editorial Board Member, Palazzo, Sergio, Editorial Board Member, Sahni, Sartaj, Editorial Board Member, Shen, Xuemin (Sherman), Editorial Board Member, Stan, Mircea, Editorial Board Member, Jia, Xiaohua, Editorial Board Member, Zomaya, Albert Y., Editorial Board Member, Fu, Weina, editor, Liu, Shuai, editor, and Dai, Jianhua, editor

Published
2021
Full Text
View/download PDF

49. Energy analysis of vibratory penetration of large-scale steel cylinders

Author

Lu, Wenjun, Zhang, Li Min, Li, J.H., Jiang, Ruochen, Li, B., Lu, Wenjun, Zhang, Li Min, Li, J.H., Jiang, Ruochen, and Li, B.

Abstract

Vibratory penetration was successfully used to install 120 integral thin-walled steel cylinders 22 m in diameter in the Hong Kong-Zhuhai-Macao Bridge. However, the eight-hammer group was found overpowered at the western island and underpowered at the eastern site due to insufficient understanding of the mechanisms of vibratory piling. In this study, energy analysis was conducted to reveal the energy characteristics of vibratory penetration, including the periodical energy superposition along the cylinder shaft, the continuous energy consumption in the soil, and the dynamic equilibrium of the total energy. The influences of vibratory soil resistance and loading frequency on the energy distributions have been thoroughly discussed. In contrast to the notion that larger input energy leads to a faster penetration, it is revealed that the vibratory penetration velocity positively correlates to the energy stored in the cylinder, the ratio of kinetic to strain energy, and the characteristic frequencies of the soil-pile system. The actual output power of the vibratory motors is influenced by the vibratory force, the ultimate soil resistance, and the soil mobilization degree. The vibration frequency is optimized as 31.1 Hz for Cylinder E9 and 15 Hz for Cylinder W36 to ensure efficiency and safety. © 2023

Published
2024

50. Mechanical behaviour and grain breakage characteristics of Tibetan glacial tills under triaxial compression

Author

Zeng, Zhixiong, Zhang, Li Min, Xu, Zhengdan, Kamali Zarch, Mohsen, Zeng, Zhixiong, Zhang, Li Min, Xu, Zhengdan, and Kamali Zarch, Mohsen

Abstract

Deglaciation due to warming climate has left a great amount of glacial tills in ravine slopes and channels in southern Tibet, which can lead to destructive debris flows and pose great threats to downstream residents and infrastructures. The mechanical properties and grain size characteristics of glacial tills are key factors that influence the initiation and development of these debris flows. In this work, a series of consolidated undrained (CU) triaxial compression tests under different confining pressures were carried out on Zelongnong glacial tills at various relative densities of 9.2%, 49.5%, 69.0% and 88.7%. The grain size distribution change before and after the CU tests was also determined. Results show that the glacial tills at relative densities of 9.2%, 49.5% and 69.0% exhibited a remarkable strain-softening and contractive behaviour during shearing, while those at a relative density of 88.7% presented a dilatant behaviour. As the relative density increased, the shear strength, elastic modulus and shearing friction angle increased, reducing the liquefaction potential. Based on the increasing rate of mechanical resistance with the increasing relative density, a critical value of 69.0% was identified to appreciate the distinct mechanical responses of the specimens. From the grain size distributions before and after CU tests, the content of grains with a diameter larger than 0.85 mm decreased due to the grain breakage while that of grains smaller than 0.3 mm increased. The higher the specimen relative density, the larger the grain breakage ratio owing to the increasing friction resistance. This grain breakage in turn causes a downward shift of the critical state line on the plane of void ratio and mean effective stress. © 2024, The Author(s).

Published
2024

Catalog

Books, media, physical & digital resources
See catalog results