Geofluids, 2021 The safe and efficient mining of deep coal resources is severely restricted by the dynamic disasters caused by high gas and high ground stress. Taking a deep mine in China as the research background, a mechanical model of the front supporting stress with
Yang Yu +5 more
doaj +1 more source
Study on Gas Control in Goaf of High Gas Coal Seam: A Case Study of Tingnan Coal Mine, China
Geofluids, 2022 When stratified mining is used in extrathick coal seam, the gas emission in goaf of the first mining face is large, and it is easy to cause gas overrun in the upper corner during the rapid advance of the working face, which seriously affects the safe and
Jiamei Chai
doaj +1 more source
Investigation of the wake energy recovery of cross-flow turbines in paired configuration by means of 3d-CFD and analysis of the streamwise momentum budget [PDF]
E3S Web of Conferences, 2021 Literature suggests that cross-flow turbines (CFTs) could be suitable for off-shore wind farms because of the high power-density achievable by shortening the distance between arrays as allowed by a fast wake energy recovery experimentally detectable.
Zanforlin Stefania, Lupi Paola
doaj +1 more source
Empennage sizing with the tail volume complemented with a method for dorsal fin layout [PDF]
INCAS Bulletin, 2021 Purpose: Provide good values for the tail volume coefficient and the lever arm as a percentage of the fuselage length. Provide a statistical method for dorsal fin layout.
Dieter SCHOLZ
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NUMERICAL ANALYSIS OF A NOVEL VERTICAL-AXIS WIND TURBINE LAYOUT
INMATEH Agricultural Engineering, 2023 Governmental incentives, technological progress, and lowering costs have made renewable energy more accessible and more affordable for residential areas. Switching to renewable energy sources not only reduces greenhouse gas emissions but also provides long-term financial gains, energy independence, and a cleaner environment for communities.
Dragos PREDA +5 more
openaire +1 more source
Area-Universal Rectangular Layouts [PDF]
, 2009 A rectangular layout is a partition of a rectangle into a finite set of interior-disjoint rectangles. Rectangular layouts appear in various applications: as rectangular cartograms in cartography, as floorplans in building architecture and VLSI design ...
Eppstein, David +3 more
core +4 more sources
Optimal layout of roadway under goaf of shallow coal seam group in Donggou Coal Mine
Meikuang Anquan, 2022 In order to study the roadway layout and reasonable staggered distance of the lower coal seam during the mining of short-range shallow coal seam, taking Xinjiang Donggou Coal Mine as the engineering background, the simulation of the layout of internal ...
ZHENG Guanghui +2 more
doaj +1 more source
Study of vertical milling machine layout in terms of rigidity
IOP Conference Series: Materials Science and Engineering, 2020 Abstract The paper explores the signs of static elastic deformation when operating milling machines. The research is concerned with the issue of simulation of a machine-device-tool-workpiece system for preliminary evaluation of elastic deformation on treatment in order to eliminate rejects.
R M Khusainov +2 more
openaire +1 more source
Radiation-hard ASICs for optical data transmission in the ATLAS pixel detector [PDF]
, 2003 We have developed two radiation-hard ASICs for optical data transmission in the ATLAS pixel detector at the LHC at CERN: a driver chip for a Vertical Cavity Surface Emitting Laser (VCSEL) diode for 80 Mbit/s data transmission from the detector, and a Bi ...
Arms, K E +14 more
core +3 more sources
Structure from motion systems for architectural heritage. A survey of the internal loggia courtyard of Palazzo dei Capitani, Ascoli Piceno, Italy [PDF]
, 2015 We present the results of a point-cloud-based survey deriving from the use of image-based techniques, in particular with multi-image monoscopic digital photogrammetry systems and software, the so-called “structure-from-motion” technique.
Ippoliti, Elena +2 more
core +4 more sources