Results 21 to 30 of about 13,805,690 (177)

Deformation Prediction of Tunnel-Surrounding Rock Considering the Time Effect of the Viscosity Coefficient: A Case of an NATM-Excavated Tunnel

open access: yesFrontiers in Earth Science, 2022
Considering engineering problems such as complicated stress and the difficulty in controlling large deformation while a tunnel passes through a soft rock stratum, a theoretical prediction model of convergence deformation of tunnel-surrounding rock is ...
Da Hu   +5 more
doaj   +1 more source

Differentiation of human pluripotent stem cells to brain microvascular endothelial cell-like cells suitable to study immune cell interactions

open access: yesSTAR Protocols, 2021
Summary: We describe the extended endothelial cell culture method (EECM) for the differentiation of human pluripotent stem cells (hPSCs) into brain microvascular endothelial cell (BMEC)-like cells.
Hideaki Nishihara   +5 more
doaj   +1 more source

Fractional Order Derivative Nishihara Model of Artificial Frozen Soil

open access: yesAdvances in Engineering Research, 2014
Strength and creep performance is the most important in the frozen soil mechanics, It is an important basic basis on engineering foundation construction in cold region and artificial freezing method in shaft sinking. However, the nature of the frozen soil creep is complex, as well as the restriction of objective conditions, it has not been fully ...
Ying XU   +3 more
openaire   +1 more source

Creep behaviour and constitutive model of coal filled with gas

open access: yesInternational Journal of Mining Science and Technology, 2017
Coal exhibits different creep behaviours when filled with different amounts of gas. Creep tests of coal filled with 0 and 0.5 MPa gas were performed, and strain under different axial stress was compared.
Xiangchun Li   +6 more
doaj   +1 more source

Polypyridyl Coordination Motifs as Precursors for Ordered Carbonaceous Frameworks Toward High‐Density Ru Single‐Atom Catalysts

open access: yesAngewandte Chemie, EarlyView.
Here, we introduce a molecular design principle that fundamentally expands the bottom‐up synthesis of single‐atom catalysts (SACs). Coordinatively flexible polypyridyl units enable bottom‐up formation of ordered carbonaceous frameworks containing atomically dispersed Ru (∼11 wt%) by simple carbonization.
Koki Chida   +13 more
wiley   +2 more sources

Unloading Rheological Test and Model Research of Hard Rock under Complex Conditions

open access: yesAdvances in Materials Science and Engineering, 2020
In order to study the unloading rheological properties of hard rock under complicated conditions, the proposed Mengdigou hydropower station with a granite dam foundation was taken as the research object.
Longyun Zhang, Shangyang Yang
doaj   +1 more source

Improved Nishihara model considering the effect of moisture content on the whole shear creep process of shale

open access: yes, 2022
Abstract The moisture content is closely related to the shear creep deformation behavior of soft rock, and the linear creep deformation behavior of soft rock can be described by the classical Nishihara model. However, the classical Nishihara model cannot describe the deformation characteristics of the whole process of shear creep including ...
Bin Hu   +5 more
openaire   +1 more source

Nonlinear Viscoelastic–Plastic Creep Model Based on Coal Multistage Creep Tests and Experimental Validation

open access: yesEnergies, 2019
The development of fractures, which determine the complexity of coal creep characteristics, is the main physical property of coal relative to other rocks.
Junxiang Zhang   +3 more
doaj   +1 more source

The Research on the Effect of Humidity on the Rheological Model of Swelling Rock

open access: yesAdvances in Civil Engineering, 2020
The research on the rheological mechanical behaviour of swelling rock in the condition of humidity field has a significant meaning for large rock engineering, such as deep coal mining, tunnelling, and slope engineering.
Ming Ji, Yi-Dong Zhang
doaj   +1 more source

Shear Creep Properties and Creep Model of Gravel Sliding Zone: A Case Study of the Zhoujia Landslide in China

open access: yesFrontiers in Earth Science, 2022
Creep behavior of landslide sliding zones is closely related to the long-term stability and safety of landslides. In this paper, shear creep tests are carried out on undisturbed samples of the gravel sliding zone in the Zhoujia landslide.
Shizhuang Chen   +10 more
doaj   +1 more source

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