Results 21 to 30 of about 351,030 (147)

Flow coupling during three-phase gravity drainage [PDF]

open access: yes, 2011
We measure the three-phase oil relative permeability k(ro) by conducting unsteady-state drainage experiments in a 0.8 m water-wet sand pack. We find that when starting from capillary-trapped oil, k(ro) shows a strong dependence on both the flow of water ...
Aminzadeh, B.   +3 more
core   +1 more source

Integrated busbar protection scheme utilizing a numerical technique based on coherence method

open access: yesThe Journal of Engineering, 2022
A Busbar (BB) is one of the most important elements of a power system, which links a variety of elements such as generators, power transformers, transmission lines and loads.
R. A. Mahmoud
doaj   +1 more source

Weak bisimulation for coalgebras over order enriched monads [PDF]

open access: yes, 2015
The paper introduces the notion of a weak bisimulation for coalgebras whose type is a monad satisfying some extra properties. In the first part of the paper we argue that systems with silent moves should be modelled coalgebraically as coalgebras whose ...
Brengos, Tomasz
core   +1 more source

Research on oil displacement mechanism in conglomerate using CT scanning method

open access: yesPetroleum Exploration and Development, 2014
Taking the conglomerate from Xinjiang Oilfield as study object, the porosity distribution characteristics of the conglomerate were analyzed with CT scanning; through the online monitoring of the water and polymer flooding process in a conglomerate core ...
Shiguan DENG   +9 more
doaj   +1 more source

Extra‐sensitive impedance differential protection immune to CT saturation

open access: yesIET Generation, Transmission & Distribution, 2020
For extra‐high voltage transmission lines configured with a communication channel, the current differential protection is facing a dilemma between sensitivity and security. On the one hand, the resistive coverage will not be sufficiently high if security
Ning Tong   +6 more
doaj   +1 more source

PLA Films Containing Montmorillonite Nanoclay–Citronella Essential Oil Hybrids for Potential Active Film Formulation

open access: yesMacromol, 2023
This work evaluated the synergistic effect of citronella essential oil (Ct) and montmorillonite (MMT) (called hybrid compound) incorporated in Poly(lactic acid) (PLA) films at different concentrations (3, 10, 15, and 20 wt%). PLA films were characterized
Rafaela R. Ferreira   +3 more
doaj   +1 more source

Solving the Shortest Vector Problem in Lattices Faster Using Quantum Search [PDF]

open access: yes, 2013
By applying Grover's quantum search algorithm to the lattice algorithms of Micciancio and Voulgaris, Nguyen and Vidick, Wang et al., and Pujol and Stehl\'{e}, we obtain improved asymptotic quantum results for solving the shortest vector problem.
A. Ambainis   +39 more
core   +2 more sources

Saturation Detection-Based Blocking Scheme for Transformer Differential Protection

open access: yesEnergies, 2014
This paper describes a current differential relay for transformer protection that operates in conjunction with a core saturation detection-based blocking algorithm.
Byung Eun Lee   +5 more
doaj   +1 more source

The test bench for simulation impact of core saturation on the current transformer on coordination of inverse relay protection [PDF]

open access: yesE3S Web of Conferences
When the measurement-type Current Transformer (CT) is used for protection schemes, this condition causes problems related to the operation of the protection relay.
Supriyanto, Utomo Heri Budi, Sunarto
doaj   +1 more source

Investigation of the relationship of CO-RADS and CT patterns with laboratory parameters in COVID-19 patients and a new perspective on the total CT scoring system

open access: yesBMC Medical Imaging, 2022
Background It is important to determine the correlation of the CO-RADS classification and computed tomography (CT) patterns of the lung with laboratory data.
Nevin Aydin   +17 more
doaj   +1 more source

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