Results 61 to 70 of about 561,686 (251)
European Ports as Energy Hubs: A Sustainability Index to Assess Territorial Development
Business Strategy and the Environment, EarlyView.ABSTRACT The capacity of ports to act as energy hubs is increasingly relevant in light of sustainability challenges and global crises like the Ukraine conflict, the COVID‐19 pandemic and energy scarcity. Numerous international and national initiatives are shaping the future of port development to address environmental and economic concerns.
Paolo Mazzocchi +3 more
wiley +1 more source
Mathematics, 2022 As is well-known, unlike the one-dimensional case, there exist nonnegative polynomials in several real variables that are not sums of squares. First, we briefly review a method of approximating any real-valued nonnegative continuous compactly supported ...
Octav Olteanu
doaj +1 more source
ChemElectroChem, EarlyView.A computational framework is presented for reproducing the full X‐ray absorption fine structure (XAFS) through quantum‐chemical simulations. The near‐edge region is captured using time‐dependent density‐functional perturbation theory applied to core excitations, while ab initio molecular dynamics provides sampling of core‐excitation energies and ...
Philipp Hönicke +2 more
wiley +1 more source
On the limit of non-standard q-Racah polynomials
, 2012 The aim of this article is to study the limit transitions from non-standard q-Racah polynomials to big q-Jacobi, dual q-Hahn, and q-Hahn polynomials such that the orthogonality properties and the three-term recurrence relations remain ...
Gasper +13 more
core +1 more source
A [3]Rotaxane Containing {Ti7Ga} Rings Linking CuII: Synthesis, Structure, and Spectroscopic Studies
Chemistry – A European Journal, EarlyView.Extended hybrid inorganic‐organic [2]‐ and [3]‐rotaxanes are reported based on heterometallic rings with threads that link CuII complexes; the crystal structures are reported, and the solution behavior is investigated by double electron electron resonance spectroscopy methods.
Selena J. Lockyer +7 more
wiley +1 more source
Bethe Ansatz Solutions to Quasi Exactly Solvable Difference Equations
Symmetry, Integrability and Geometry: Methods and Applications, 2009 Bethe ansatz formulation is presented for several explicit examples of quasi exactly solvable difference equations of one degree of freedom which are introduced recently by one of the present authors.
Ryu Sasaki, Wen-Li Yang, Yao-Zhong Zhang
doaj +1 more source
Journal of Advanced Research, 2010 Formulae expressing explicitly the q-difference derivatives and the moments of the polynomials Pn(x ; q) ∈ T (T ={Pn(x ; q) ∈ Askey–Wilson polynomials: Al-Salam-Carlitz I, Discrete q-Hermite I, Little (Big) q-Laguerre, Little (Big) q-Jacobi, q-Hahn ...
Eid H. Doha, Hany M. Ahmed
doaj +1 more source
Spectral Transformations and Associated Linear Functionals of the First Kind
Axioms, 2021 Given a quasi-definite linear functional u in the linear space of polynomials with complex coefficients, let us consider the corresponding sequence of monic orthogonal polynomials (SMOP in short) (Pn)n≥0.
Juan Carlos García-Ardila +1 more
doaj +1 more source
Orthogonal polynomials and Laurent polynomials related to the Hahn-Exton q-Bessel function [PDF]
, 1995 Laurent polynomials related to the Hahn-Exton $q$-Bessel function, which are $q$-analogues of the Lommel polynomials, have been introduced by Koelink and Swarttouw.
Koelink, Erik, Van Assche, Walter
core +3 more sources
International Journal of Mathematics and Mathematical Sciences, 2006 We show that if v is a symmetric regular Laguerre-Hahn linear form (functional), then the linear form u defined by u=−λx−2v+δ0 is also regular and symmetric Laguerre-Hahn linear form for every complex λ except for a discrete set of numbers depending ...
M. Sghaier, J. Alaya
doaj +1 more source