Results 31 to 40 of about 35,118 (269)

Bifurcation analysis of a three dimensional system

open access: yesJournal of Hebei University of Science and Technology, 2018
In order to enrich the stability and bifurcation theory of the three dimensional chaotic systems, taking a quadratic truncate unfolding system with the triple singularity equilibrium as the research subject, the existence of the equilibrium, the ...
Yongwen WANG, Zhiqin QIAO, Yakui XUE
doaj   +1 more source

Subcritical bifurcation and bistability in thermoacoustic systems

open access: yes, 2013
This paper analyses subcritical transition to instability, also known as triggering in thermoacoustic systems, with an example of a Rijke tube model with an explicit time delay.
Subramanian, Priya   +2 more
core   +2 more sources

Stability and activity of doped transition metal zeolites in the hydrothermal processing

open access: yesFrontiers in Energy Research, 2015
This study investigates the stability and activity of HZSM-5 doped with metals such as molybdenum, nickel, copper and iron in under hydrothermal conditions used for the direct liquefaction of microalgae.
Thomas François Robin   +3 more
doaj   +1 more source

Effects of extraction methods on the quality of elderberry seed oil

open access: yesShipin yu jixie, 2022
Objective: This study aimed to compare the effects of different extraction methods including cold pressing extraction, soxhlet extraction and subcritical butane extraction on the yield, physicochemical properties, fatty acid composition and in vitro ...
XUE Qing   +7 more
doaj   +1 more source

Cygnus Performance in Subcritical Experiments [PDF]

open access: yes2007 IEEE 34th International Conference on Plasma Science (ICOPS), 2007
Summary form only given. The Cygnus Dial Beam Radiographic Facility consists of two identical radiographic sources with the following specifications: 4-rad dose at 1 m, 1-mm spot size, 50-ns pulse length, 2.25-MeV endpoint energy. The facility is located in an underground tunnel complex at the Nevada Test Site.
J. Smith   +9 more
openaire   +1 more source

Physicochemical characteristics of chitosan from swimming crab (Portunus trituberculatus) shells prepared by subcritical water pretreatment

open access: yesScientific Reports, 2021
The physicochemical properties of chitosan obtained from the shells of swimming crab (Portunus trituberculatus) and prepared via subcritical water pretreatment were examined.
Gengxin Hao   +6 more
doaj   +1 more source

Kinetics of Formic Acid Decomposition in Subcritical and Supercritical Water - A Raman Spectroscopic Study [PDF]

open access: yes, 2019
The decomposition of formic acid is studied in a continuous sub- or supercritical water reactor at temperatures between 300 and 430°C, a pressure of 25 MPa, residence times between 4 and 65 s, and a feedstock concentration of 3.6 wt%.
Brian, Pinkard   +5 more
core   +1 more source

Comparative evaluation of extraction methods for fragrant semen Trichosanthis oil: Cold pressing, conventional solvent, subcritical n-butane and supercritical CO2

open access: yesFood Chemistry: X
The physicochemical properties, chemical compositions, antioxidant activities, and volatile profiles of fragrant Semen Trichosanthis oil (FSTO) extracted by cold pressing (CP), solvent extraction (SE), subcritical n-butane extraction (SBE), and ...
Ling-Biao Gu   +9 more
doaj   +1 more source

The pulsed subcritical amplifier of neutron flux driven by high-intensity neutron generator [PDF]

open access: yesNuclear Technology and Radiation Protection, 2019
The subcritical reactor driven by external neutron source could apply as useful instrument for modern nuclear energy applications requiring high-level irradiation of different materials by the high-energy and high-intense neutron flux (e. g.
Babenko Vladimir   +2 more
doaj   +1 more source

Global bifurcations to subcritical magnetorotational dynamo action in Keplerian shear flow [PDF]

open access: yes, 2013
Magnetorotational dynamo action in Keplerian shear flow is a three-dimensional, non-linear magnetohydrodynamic process whose study is relevant to the understanding of accretion processes and magnetic field generation in astrophysics.
Cossu, Carlo   +11 more
core   +1 more source

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