Results 91 to 100 of about 4,570,024 (235)

Evolution of broken pressure and fracture morphology in indirect fracturing for broken-soft coal

open access: yesMeitan xuebao
Indirect fracturing using a horizontal well in roof is a promising technology for methane exploitation in broken soft and low-permeability coal seams. Stratum-penetration fracturing and a complex fracture network with good conductivity are two keys for ...
Dijie ZHU   +5 more
doaj   +1 more source

Effect of Mining Thickness on Overburden Movement and Underground Pressure Characteristics for Extrathick Coal Seam by Sublevel Caving with High Bottom Cutting Height

open access: yesAdvances in Civil Engineering, 2018
Because the coal seam is particularly thick and the mining intensity is large, the mining of extremely thick coal seams often causes a wide range of disturbed fractures, which in turn induces the phenomenon of strong underground pressure such as induced ...
Yongkang Yang   +4 more
doaj   +1 more source

In-situ cross linking of polyvinyl alcohol [PDF]

open access: yes, 1981
A method of producing a crosslinked polyvinyl alcohol structure, such as a battery separator membrane or electrode envelope is described. An aqueous solution of a film-forming polyvinyl alcohol is admixed with an aldehyde crosslinking agent a basic pH to
Hsu, L. C.   +2 more
core   +1 more source

Strongly connected ex-situ MgB2 polycrystalline bulks fabricated by solid-state self-sintering

open access: yes, 2012
We have investigated the microstructure, normal-state electrical connectivity, and critical current density of ex-situ MgB2 polycrystalline bulks prepared by systematically varying the sintering conditions under low pressure.
Kishio, Kohji   +4 more
core   +1 more source

Tool repairs tube components in situ [PDF]

open access: yes, 1969
Two versions of a portable tool repair the seats of tube fittings and the flared ends of tubing. Each version operates on the principle of lapping to remove imperfections from tube and fitting interfacing ...
Rush, R. E., Tucker, P. E.
core   +1 more source

Post-growth annealing of GaMnAs under As capping - an alternative way to increase Tc

open access: yes, 2004
We demonstrate that in situ post-growth annealing of GaMnAs layers under As capping is adequate for achieving high Curie temperatures (Tc) in a similar way as ex situ annealing in air or in N2 atmosphere practiced earlier.Comment: 13 pages, 4 ...
Adell, M.   +9 more
core   +3 more sources

The subject-in-situ generalization revisited [PDF]

open access: yes, 2008
The goal of this paper is to re-examine the status of the condition in (1) proposed in Alexiadou and Anagnostopoulou (2001; henceforth A&A 2001), in view of recent developments in syntactic theory.
Alexiadou, Artemis   +1 more
core  

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