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101.
In this paper we introduce qualification conditions for multivalued functions in Banach spaces involving the A-approximate subdifferential, and we show that these conditions guarantee metric regularity of multivalued functions. The results are then applied for deriving Lagrange multipliers of Fritz—John type and Kuhn—Tucker type for infinite non-smooth vector optimization problems. 相似文献
102.
A. Asthana K. Momeni A. Prasad Y. K. Yap R. S. Yassar 《Applied Physics A: Materials Science & Processing》2011,102(4):909-914
The energetics and dynamics of electromigration of the oxygen vacancy is investigated with first-principles calculations and
kinetic Monte Carlo methods. To simulate the charged oxygen vacancy under external fields within the first-principles approach,
we introduce a slab model with electron-accepting dopants in the surface. The analysis of the density of states confirms that
the oxygen vacancies are positively charged. When the external field is applied, the total energy of the slab linearly changes
with respect to the position of the charged vacancy in the field direction, which allows for probing local permittivity around
the vacancy site. The activation energy of vacancy migration is lowered along the field direction in a manner that the charge
state of the vacancy is maintained along the migration path. Kinetic Monte Carlo simulations based on the first-principles
inputs are also carried out and it is shown that the high-temperature condition is important for the fast redistribution of
charged vacancies. 相似文献
103.
The focus of this paper was to gain a true understanding of the impact of a multifunctional epoxide (Joncryl®;ADR-4368) on the interfacial properties of biopolymer blends based on poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT). The effect of Joncryl on the shear rheological, morphological, and interfacial properties of the blends was systematically investigated. For the deformed drop retraction experiments, different sandwich model systems (droplet/matrix), representing various scenarios of compatibilization, were prepared, aiming to probe the role of the epoxy-functionalized chains on the interface. The decrease of the interfacial tension in the modified/compatibilized PLA_PBAT and the formation of the PLA-Joncryl-PBAT copolymer were highlighted. A new relaxation peak relative to this copolymer was detected by the relaxation spectrum. Transient start-up shear and nonlinear stress relaxation experiments were carried out and confirmed the obtained results. In addition, the interface contribution was demonstrated using the Lee and Park model. The relaxation time increased with the amount of added Joncryl. Hence, the coexistence of chain extension/branching chains coupled to the PLA-Joncryl-PBAT copolymer formation had to be taken into account to explain the improved mechanical properties. 相似文献
104.
105.
Ahmed El Akkaoui Marie-Aude Hiebel Abderrahim Mouaddib Sabine Berteina-Raboin Gérald Guillaumet 《Tetrahedron》2012,68(44):9131-9138
A two-step sequence is reported giving access to diverse 5H-pyrido[2′,1′:2,3]imidazo[4,5-b]indoles and analogues via a Bienaymé multicomponent reaction followed by N-arylation. The desired polycylic scaffolds were obtained in high yield using copper iodide in association with TMEDA in aqueous or dioxane media. 相似文献
106.
Serdar Serdas Alexander Schwarz Jörg Schröder Stefan Turek Abderrahim Ouazzi Masoud Nickaeen 《PAMM》2013,13(1):301-302
The focus of this contribution is the examination of the influence of different interpolation orders (especially for the pressure field) by solving the stationary incompressible Navier-Stokes equations with least-squares finite elements. We consider two different div-grad first-order systems which result in a three-field formulation with stresses, velocitites and pressure, see e.g. SCHWARZ & SCHRÖDER [1] and BOCHEV & GUNZBURGER [2]. Additionally, a numerical example is presented to show the performance of the considered formulations. (© 2013 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
107.
Our aim in this paper is to present sufficient conditions for error bounds in
terms of Fréchet and limiting Fréchet subdifferentials in
general Banach spaces. This allows us to develop sufficient
conditions in terms of the approximate subdifferential for systems
of the form (x, y) C × D, g(x, y, u) = 0, where
g takes values in an infinite-dimensional space and u plays
the role of a parameter. This symmetric structure offers us the
choice of imposing conditions either on C or D. We use these
results to prove the nonemptiness and weak-star compactness of
Fritz–John and Karush–Kuhn–Tucker multiplier sets, to establish the
Lipschitz continuity of the value function and to compute its
subdifferential and finally to obtain results on local
controllability in control problems of nonconvex unbounded
differential inclusions. 相似文献
108.
Bouach Abderrahim Haddad Tahar Thibault Lionel 《Journal of Optimization Theory and Applications》2022,193(1):785-830
Journal of Optimization Theory and Applications - We consider the Volterra integro-differential equation with a time-dependent prox-regular constraint that changes in an absolutely continuous way... 相似文献
109.
Armelle Cul Anthony Pesquet Adam Daïch Abderrahim Chihab‐Eddine tefan Marchalín 《Journal of heterocyclic chemistry》2003,40(3):499-505
Fused isoindolo[1,3]benzo(or thieno)oxazepines 8a,b and one of their positional isomers aromatic tricyclic N,O‐acetals 13b are reported to occur efficiently in a three‐step sequence from N‐hydroxy‐methylphthalimide (6) . The key step of this methodology is the intramolecular arylation of an endocyclic and/or exocyclic N‐acyliminium cation. The mechanism leading to these species, in particular to a tricyclic lactam 13b , is discussed. 相似文献
110.
Jana Sikoraiov Tefan Marchalín Abderrahim Chihab‐Eddine Adam Daïch 《Journal of heterocyclic chemistry》2002,39(2):383-390
Dedicated to Professor Jean Morel for his retirement The title compounds 4 have been prepared from suitable β‐amino‐ alcohol 2 and phthalic anhydride ( 5 ) in a three‐step sequence in moderate to good yields (58‐94%). The key step of this methodology is based on an intramolecular O‐cationic cyclization involving N‐acyliminium species. The high levels of the observed chemoselectivity during the intermolecular or intramolecular cyclization were also discussed. 相似文献