Results 41 to 50 of about 453,863 (195)
ENTEROLITHS SECONDARY TO STENOSIS OF LEFT COLON [PDF]
Acta Medica Iranica, 1998 A case of an acute intestinal obstruction in a 64 -year - old man, due to cicatriceal stricture of tlie left colon with secondary enteroliths in colon, is presented.
A. Behdad
doaj +2 more sources
Assessment of Coating Performance on Waterwalls and Superheaters in a Pulverised Fuel-Fired Power Station [PDF]
, 2017 Protective coatings offer one route to increase the lives of heat exchangers in pulverised fuel power plants. A range of candidate coatings have been exposed on the waterwall and superheaters of a 500 MWe UK power station unit for periods of up to ~4 ...
Davis, Colin +3 more
core +2 more sources
Results in EngineeringAn electrical arc in open air (EAOA) represents one of the most complex and critical phenomena in power systems, whose occurrence on transmission lines directly affects network reliability and stability while playing a decisive role in insulation design,
Mahyar Abasi +2 more
doaj +1 more source
Intelligent-single-phase auto-reclosing scheme using line-voltage-phasor-side analysis
Results in EngineeringDue to the extended length of transmission lines, electrical equipment is frequently exposed to various faults. To ensure a continuous supply of electricity to consumers and maintain the stability of the power grid, the implementation of reconnection ...
Mohammad Hassan Tanha +3 more
doaj +1 more source
Some Secondary Effects in a Simple Piping Structure Under Heating [PDF]
, 1964 Bending and torsion are the principal sources of relief from thermal expansion in most piping configurations. However, secondary influences, viz., (a) axial deformation, (b) shearing deformation, (c) beam-column action, and (d) shortening owing to ...
Brock, John E.
core +1 more source
Comparison and analysis of the fault arc characteristics of flexible DC transmission lines
The Journal of Engineering, 2019 VSC-HVDC grid is one of the important development directions of the smart grid in the future. The arc characteristics of transient fault on the transmission line are the theoretical basis for determining reclosing time and reclosing strategy of DC ...
Botong Li +3 more
doaj +1 more source
Modeling and simulation of muzzle flow field of railgun with metal vapor and arc
Defence Technology, 2020 During the electromagnetic railgun launching process, there will be a complex flow field with high temperature in the muzzle area because of the high-speed friction, transition and secondary arc-ignition. This paper models the muzzle area of railgun when
Yuan Gao +5 more
doaj +1 more source
Topology of RNA-RNA interaction structures [PDF]
, 2011 The topological filtration of interacting RNA complexes is studied and the role is analyzed of certain diagrams called irreducible shadows, which form suitable building blocks for more general structures.
Andersen, Jørgen E. +3 more
core +3 more sources
The Group of Disjoint 2-Spheres in 4-Space
, 2019 We compute the group of link homotopy classes of link maps of two 2-spheres into 4-space. It turns out to be free abelian, generated by geometric constructions applied to the Fenn-Rolfsen link map and detected by two self-intersection invariants ...
Schneiderman, Rob, Teichner, Peter
core +1 more source
Modeling secondary arc based on identification of arc parameters from staged fault test records
International Journal of Electrical Power & Energy Systems, 2003 Abstract A realistic representation of the secondary arcs is essential in determining the auto-reclosure performance of EHV transmission lines. In this paper the dynamic behavior of the arc is presented as a time-varying resistance using the MODELS feature of the ATP–EMTP program.
László Prikler +3 more
openaire +1 more source