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APPROXIMATION BY FUZZY B-SPLINE SERIES
BLAGA, PETRU,BEDE, BARNABAS 한국전산응용수학회 2006 Journal of applied mathematics & informatics Vol.20 No.1
We study properties concerning approximation of fuzzy-number-valued functions by fuzzy B-spline series. Error bounds in approximation by fuzzy B-spine series are obtained in terms of the modulus of continuity. Particularly simple error bounds are obtained for fuzzy splines of Schoenberg type. We compare fuzzy B-spline series with existing fuzzy concepts of splines.
ON THE GEOMETRY OF COMPLEX METALLIC NORDEN MANIFOLDS
Blaga, Adara Monica,Kumar, Rakesh,Rani, Rachna Korean Mathematical Society 2022 대한수학회보 Vol.59 No.5
We study almost complex metallic Norden manifolds and their adapted connections with respect to an almost complex metallic Norden structure. We study various connections like special connection of the first type, special connection of the second type, Kobayashi-Nomizu metallic Norden type connection, Yano metallic Norden type connection etc., on almost complex metallic Norden manifolds. We establish classifications of almost complex metallic Norden manifolds by using covariant derivative of the almost complex metallic Norden structure and also by using torsion tensor on the canonical connections.
The Critical Point Equation on 3-dimensional α-cosymplectic Manifolds
Blaga, Adara M.,Dey, Chiranjib Department of Mathematics 2020 Kyungpook mathematical journal Vol.60 No.1
The object of the present paper is to study the critical point equation (CPE) on 3-dimensional α-cosymplectic manifolds. We prove that if a 3-dimensional connected α-cosymplectic manifold satisfies the Miao-Tam critical point equation, then the manifold is of constant sectional curvature -α<sup>2</sup>, provided Dλ ≠ (ξλ)ξ. We also give several interesting corollaries of the main result.
Effect of bed configuration of immobilized biocatalysts on penicillin G hydrolysis efficiency
Anca-Irina Galaction,Alexandra Cristina Blaga,Ramona Mihaela Matran,Dan Caşcaval 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.2
The external and internal mass transfer of Penicillin G in the process of its enzymatic hydrolysis to 6-Aminopenicillanicacid under competitive and non-competitive inhibitions have been comparatively analyzed for a bioreactorwith mobile bed vs. a stationary basket bioreactor, both with Penicillin amidase immobilized in Eupergit C. ThePenicillin G mass transfer and hydrolysis enzymatic rates have been analyzed by means of the ratios’ values betweenthe oxygen mass transfer coefficients, effectiveness factors, external mass flows and Penicillin G concentrations at thebiocatalyst particle surface for the considered bioreactors. The results indicated that the bioreactor with mobile bed ismore efficient especially for biocatalyst particles with diameter under 1.5 mm. For larger particles the performances ofthe two bioreactors become similar. Moreover, taking into consideration the external mass flow of Penicillin G and thenumber of enzymatic hydrolysis cycles, the basket bioreactor is recommended. The mathematical equations proposedare in good concordance with the experimental results, the average deviations varying from ±4.11% for the bioreactorwith mobile bed of immobilized Penicillin amidase to ±5.03% for the basket bioreactor.