Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Sifeng Zhang"'
Autor:
Hengyuan Zhang, Sifeng Zhang
Publikováno v:
BMC Geriatrics, Vol 24, Iss 1, Pp 1-15 (2024)
Abstract Background China’s government has invested a great deal of resources to improve the coverage rate of community care facilities for the elderly. However, the facilities that have been built are underutilized. Methods Referring to the Anders
Externí odkaz:
https://doaj.org/article/392e72670fb7492abee820c1669cbd65
Publikováno v:
Frontiers in Earth Science, Vol 11 (2024)
In recent years, super-long and super-large diameter pipe piles have been gradually applied to the foundation in the Yellow River flood area. However, its bearing mechanism is not clear, especially the unclear bearing characteristics of the pile unde
Externí odkaz:
https://doaj.org/article/fdcb2fb0caa842c3ab349daceef8fb04
Autor:
Yongqian Zhao, Guoqing Zhang, Gengchen Zang, Guojian Zhang, Wengang Sang, Sifeng Zhang, Wanqiu Li
Publikováno v:
Applied Sciences, Vol 13, Iss 19, p 10838 (2023)
Dynamic deflection deformation is a crucial index which can reflect the healthy operation of bridges; due to their limitations, monitoring technologies (e.g., sensors, automatic total stations, and GPS) cannot perform high-frequency and whole-process
Externí odkaz:
https://doaj.org/article/10f304d439874aa2b5e34d7bced9dad3
Autor:
Sifeng Zhang, Wenxiang Meng, Lulu Wang, Lingxin Li, Yanju Long, Yunrui Hei, Luting Zhou, Shenglan Wu, Ziguang Zheng, Lijun Luo, Fengzhi Jiang
Publikováno v:
Nanoscale Research Letters, Vol 15, Iss 1, Pp 1-13 (2020)
Abstract In the present work, a tubular nano-copper sulfide was successfully synthesized by hydrothermal method. The physical and chemical properties of the prepared materials were characterized by XRD, SEM, TEM, and BET. The synthesized copper sulfi
Externí odkaz:
https://doaj.org/article/3acab5de21af4a098653c0939977c68b
Autor:
Xiao Feng, Chong Xia, Sifeng Zhang, Chuangui Li, Hongkui Zhao, Jianfeng Wu, Mengjun Chen, Jia Yan
Publikováno v:
Geofluids, Vol 2022 (2022)
In the treatment of goafs in traffic engineering, technical problems such as those related to large-volume grouting and the precise control of material properties are often encountered. To address these issues, we developed a new composite material c
Externí odkaz:
https://doaj.org/article/c2fc52f10fcc4e06860499b2e1b19968
Publikováno v:
Advances in Civil Engineering, Vol 2022 (2022)
Vertical plate anchors are an effective technique to enhance the stability of various structures, such as retaining walls and sheet piles. More research has been devoted to their bearing capacity and macroscopically affecting parameters, while less r
Externí odkaz:
https://doaj.org/article/6cba6be6091541ccb9656dde5281e001
Publikováno v:
Advances in Materials Science and Engineering, Vol 2022 (2022)
To study the contact mechanical characteristics and breakage mechanism of single particle, the particle contact experiment is simulated using the discrete element method. In this paper, to solve the problem that the envelope of the shear strength of
Externí odkaz:
https://doaj.org/article/f8306166be35475aa5addb4198f94f49
Autor:
Guojian Zhang, Zhiyong Liu, Wei Xiong, Sifeng Zhang, Shengzhen Liu, Zhiwei Wang, Yushuai Wang
Publikováno v:
Applied Sciences, Vol 12, Iss 22, p 11468 (2022)
The penetration of large-diameter tubular piles and their relevant construction effect have significant influences on the bearing capacity of piles and nearby buildings (structures). This study focuses on developing an indoor test model device for th
Externí odkaz:
https://doaj.org/article/c4d590d3110a4d5590721d52003b5090
Publikováno v:
Energies, Vol 15, Iss 19, p 7270 (2022)
Mining coal, oil and other energy will form much slope engineering, such as open-pit mine slope and oil depot slope. The groundwater seepage seriously affects the stability of these slope engineering projects. Drainage pipes are commonly used in slop
Externí odkaz:
https://doaj.org/article/359c1376e9d8488797a147f2216af357
Publikováno v:
Healthcare, Vol 9, Iss 2, p 112 (2021)
With the increase in aging in China, the health problems of older adults, especially mental health problems, have become a concern for the whole society. This article selected urban and rural older adults and analyzed the impact of social support on
Externí odkaz:
https://doaj.org/article/fc24e91e5202441497df3bb370d91080