Results 61 to 70 of about 2,839 (96)

Effect of boron on the recovery of nitrification efficiency after high ammonia nitrogen impact

open access: yesGongye shui chuli
By increasing the concentration of ammonia nitrogen, the stable nitrification system was inhibited, and then boron was added to the reactor to improve the recovery of nitrification efficiency.
ZHAO Yingying   +3 more
doaj   +1 more source

On the convergence of the SAOR method and the error bounds for its acceleration

open access: yesJournal of Computational and Applied Mathematics, 1988
The symmetric accelerated overrelaxation (SAOR) method is an iterative method similar to the symmetric successive overrelaxation (SSOR) method, but it differs from that better known method in that it requires the use to choose two rather than one acceleration parameter. If the two parameters are equal, the SAOR method is the same as the SSOR method. In
Evans, D.J., Li, C.
openaire   +1 more source

Derived equivalences induced by good silting complexes

open access: yes, 2017
Consider a (possibly big) silting object $U$ in a derived category over a (dg-)algebra $A$. Under some fairly general appropriate hypotheses, we show that it induces derived equivalences between the derived category over $A$ and a localization of the ...
Breaz, Simion, Modoi, George Ciprian
core  

Staphylococcus aureus con resistencia múltiple a los antibióticos (MDR) en un Hospital de Maracaibo-Venezuela

open access: yesKasmera, 2016
: Oxacillin-resistant Staphylococcus aureus (ORSA) has remained a major cause of nosocomial infections worldwide. The antibiotic resistance of isolations was determined and we classify them in multidrug-resistant, extensively drug-resistant or pandrug ...
Gómez-Gamboa Liliana   +4 more
doaj  

Etnicidad, nacionalismo y el Estado en Afganistán

open access: yes, 2002
The paper begins by surveying the cultural, linguistic, occupational and sectarian diversity of Afghanistan's population, going on to discuss the origins of the modern Afghan state in the reign of Amir Abdur Rahman Khan in the late 19th century.
Beattie, Hugh
core  

$t$-Structures on stable derivators and Grothendieck hearts

open access: yes, 2018
We prove that given any strong, stable derivator and a $t$-structure on its base triangulated category $\cal D$, the $t$-structure canonically lifts to all the (coherent) diagram categories and each incoherent diagram in the heart uniquely lifts to a ...
Saorín, Manuel   +2 more
core  

A Rhampsinitus Story from Skye

open access: yesScottish Studies, 1958
James Ross
doaj  

Further Development of Chebyshev Acceleration in Connection with SAOR Method

open access: yesFurther Development of Chebyshev Acceleration in Connection with SAOR Method
P(論文) The paper is concerned with an improvement over the symmetric accelerated overrelaxation (SAOR) method for an iterative solution of large linear systems. At first, the Chebyshev acceleration (or semi-iteration) procedure is introduced to the SAOR method, and the Non-Adaptive SAOR-SI algorithm is developed.
openaire  

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