Results 11 to 20 of about 351,030 (147)

Short relaxation times but long transient times in both simple and complex reaction networks [PDF]

open access: yes, 2015
When relaxation towards an equilibrium or steady state is exponential at large times, one usually considers that the associated relaxation time $\tau$, i.e., the inverse of that decay rate, is the longest characteristic time in the system.
Henry, Adrien, Martin, Olivier
core   +3 more sources

CT Saturation Detection with Calculation of Instantaneous Impedance of Magnetic Branch Using FILT [PDF]

open access: yesمجله مدل سازی در مهندسی, 2017
Accurate indiscrimination of CT saturation can be caused mal-operation of protection systems. Due to nonlinear and loss characteristic behavior of CTs, it is necessary to use a numerical method to detect CT saturation, accurately.
Alireza Fallahi   +2 more
doaj   +1 more source

Modeling the effect of soil meso- and macropores topology on the biodegradation of a soluble carbon substrate [PDF]

open access: yes, 2015
Soil structure and interactions between biotic and abiotic processes are increasingly recognized as important for explaining the large uncertainties in the outputs of macroscopic SOM decomposition models.
Chenu, Claire   +9 more
core   +5 more sources

Improved rotor position estimation by signal injection in brushless AC motors, accounting for cross-coupling magnetic saturation [PDF]

open access: yes, 2007
The paper presents an improved signal injection- based sensorless control method for permanent magnet brushless AC (BLAC) motors, accounting for the influence of cross-coupling magnetic saturation between the d- and q-axes.
Bingham, Chris   +4 more
core   +1 more source

Polymeric foams as the matrix of voltammetric sensors for the detection of catechol, hydroquinone, and their mixtures [PDF]

open access: yes, 2018
Producción CientíficaPorous electrodes based on polymethylmethacrylate and graphite foams (PMMA_G_F) have been developed and characterized. Such devices have been successfully used as voltammetric sensors to analyze catechol, hydroquinone, and their ...
Fernández Blanco, C.   +4 more
core   +1 more source

Imaging spontaneous imbibition in full Darcy‐scale samples at pore‐scale resolution by fast X‐ray tomography [PDF]

open access: yes, 2019
Spontaneous imbibition is a process occurring in a porous medium which describes wetting phase replacing nonwetting phase spontaneously due to capillary forces.
Bartels, W. B.   +9 more
core   +2 more sources

An Accurate CT Saturation Classification Using a Deep Learning Approach Based on Unsupervised Feature Extraction and Supervised Fine-Tuning Strategy

open access: yesEnergies, 2017
Current transformer (CT) saturation is one of the significant problems for protection engineers. If CT saturation is not tackled properly, it can cause a disastrous effect on the stability of the power system, and may even create a complete blackout.
Muhammad Ali   +3 more
doaj   +1 more source

EVALUATION OF CURRENT SIGNALS AT OBSERVED POINTS OF THE ELECTRICAL NETWORK IN PROBLEMS OF IDENTIFICATION OF CURRENT TRANSFORMER SATURATION

open access: yesВестник Северо-Кавказского федерального университета, 2022
Despite the fact that the problem of saturation of current transformers (CT) has been known for a long time, it has not lost its relevance now. Cases of malfunctioning as a result of oversaturation of CT are still recorded today.
P. Shagimardanov
doaj   +1 more source

Ischaemic strokes in patients with pulmonary arteriovenous malformations and hereditary hemorrhagic telangiectasia: associations with iron deficiency and platelets. [PDF]

open access: yes, 2014
BackgroundPulmonary first pass filtration of particles marginally exceeding ∼7 µm (the size of a red blood cell) is used routinely in diagnostics, and allows cellular aggregates forming or entering the circulation in the preceding cardiac cycle to lodge ...
AD Kjeldsen   +83 more
core   +3 more sources

Experimental Study on the Shear Band of Methane Hydrate-Bearing Sediment

open access: yesJournal of Marine Science and Engineering, 2021
The occurrence of a shear band is often thought as the precursor of failure. To study the initiation of shear banding in gas hydrate-bearing sediments, two groups of triaxial compression tests combined with a CT (computer tomography) scan were conducted ...
Xiaobing Lu   +5 more
doaj   +1 more source

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