Experimental study of the surface potential characteristics of coal containing gas under different loading modes (uniaxial, cyclic and graded)

2019 ◽  
Vol 249 ◽  
pp. 102-111 ◽  
Author(s):  
Yongjie Liu ◽  
Xuelong Li ◽  
Zhonghui Li ◽  
Peng Chen ◽  
Tao Yang
Keyword(s):  
Experimental Study ◽  
Surface Potential ◽  
Loading Modes

Experimental study on variation laws of coal surface potential during gas adsorption

2019 ◽  
Vol 43 (5) ◽  
pp. 634-643
Author(s):  
Yongjie Liu ◽  
Xuelong Li ◽  
Jiangong Li ◽  
Peng Chen ◽  
Tao Yang
Keyword(s):  
Experimental Study ◽  
Surface Potential ◽  
Gas Adsorption ◽  
Coal Surface

Behaviour of Flow-Drilling Screw Connections

2014 ◽  
Vol 794-796 ◽  
pp. 413-415 ◽  
Author(s):  
Johan Kolstø Sønstabø ◽  
Petter Henrik Holmstrøm ◽  
David Morin ◽  
Magnus Langseth
Keyword(s):  
Experimental Study ◽  
Deformation And Fracture ◽  
Loading Modes ◽  
Flow Drilling ◽  
Cross Test

An experimental study on the behaviour and fracture of flow-drilling screw connections was carried out. Cross test specimens were used to study the deformation and fracture of the connections under different loading modes. For comparison, tests were also carried out on self-piercing rivet connections.

scholarly journals Experimental study on the influence of seismic subsidence of Loess under bidirectional loading modes

2021 ◽  
pp. 100064
Author(s):  
Gaofeng Che ◽  
Ping Wang ◽  
Qian Wang ◽  
Xiaowu Pu ◽  
Jinlian Ma ◽  
...  
Keyword(s):  
Experimental Study ◽  
Loading Modes

scholarly journals An experimental study of hamstring muscle rupture under different loading modes

2020 ◽  
Vol 23 (sup1) ◽  
pp. S223-S225
Author(s):  
Baptiste Pillet ◽  
Pierre Badel ◽  
Pascal Edouard ◽  
Baptiste Pierrat
Keyword(s):  
Experimental Study ◽  
Hamstring Muscle ◽  
Muscle Rupture ◽  
Loading Modes

The effects of surface absorbed monolayer microdiffraction patterns

1988 ◽  
Vol 46 ◽  
pp. 680-681
Author(s):  
M. Pan ◽  
J.M. Cowley
Keyword(s):  
Surface Potential ◽  
Electron Probe ◽  
Potential Distribution ◽  
Crystal Surface ◽  
Normal Direction ◽  
Surface Image ◽  
Extended Surface ◽  
Gas Molecules ◽  
Surface Nature ◽  
Electron Microdiffraction

Electron microdiffraction patterns, obtained when a small electron probe with diameter of 10-15 Å is directed to run parallel to and outside a flat crystal surface, are sensitive to the surface nature of the crystals. Dynamical diffraction calculations have shown that most of the experimental observations for a flat (100) face of a MgO crystal, such as the streaking of the central spot in the surface normal direction and (100)-type forbidden reflections etc., could be explained satisfactorily by assuming a modified image potential field outside the crystal surface. However the origin of this extended surface potential remains uncertain. A theoretical analysis by Howie et al suggests that the surface image potential should have a form different from above-mentioned image potential and also be smaller by several orders of magnitude. Nevertheless the surface potential distribution may in practice be modified in various ways, such as by the adsorption of a monolayer of gas molecules.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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