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The macroscopic properties of a quantum system strongly depend on the spreading of the physical eigenfunctions (wavefunctions) of its Hamiltonian operador over its confined domain. The wavefunctions are often controlled by classical or hypergeometric-type orthogonal polynomials (Hermite, Laguerre and Jacobi). Here we discuss the spreading of these polynomials over its orthogonality interval by means of various information-theoretic quantities which grasp some facets of the polynomial distribution not yet analyzed. We consider the information-theoretic lengths closely related to the Fisher information and Rényi and Shannon entropies, which quantify the polynomial spreading far beyond the celebrated standard deviation. 相似文献
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Julio Becerra Guerrero ngel Rodríguez Palacios 《Journal of Mathematical Analysis and Applications》2009,360(1):108-118
Almost transitive superreflexive Banach spaces have been considered in [C. Finet, Uniform convexity properties of norms on superreflexive Banach spaces, Israel J. Math. 53 (1986) 81–92], where it is shown that they are uniformly convex and uniformly smooth. We characterize such spaces as those convex transitive Banach spaces satisfying conditions much weaker than that of uniform convexity (for example, that of having a weakly locally uniformly rotund point). We note that, in general, the property of convex transitivity for a Banach space is weaker than that of almost transitivity. 相似文献
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Jesús Guillermo Soriano‐Moro Gabriel Jaramillo‐Soto Ramiro Guerrero‐Santos Eduardo Vivaldo‐Lima 《大分子反应工程》2009,3(4):178-184
Calculations of polymerization kinetics and molecular weight development in the dithiolactone‐mediated polymerization of styrene at 60 °C, using 2,2′‐azobisisobutyronitrile (AIBN) as initiator and γ‐phenyl‐γ‐butirodithiolactone (DTL1) as controller, are presented. The calculations were based on a polymerization mechanism based on the persistent radical effect, considering reverse addition only, implemented in the PREDICI® commercial software. Kinetic rate constants for the reverse addition step were estimated. The equilibrium constant (K = kadd/k‐add) fell into the range of 105–106 L · mol?1. Fairly good agreement between model calculations and experimental data was obtained.
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H.-D. Pfannes D. S. Vieira Junior R. Paniago J. H. Dias Filho 《Hyperfine Interactions》2005,165(1-4):247-252
The formation of local moments and the effect of charge carrriers in dilute magnetic semiconductors can be well understood using local probe techniques like Mossbauer Spectroscopy. We report here on Mossbauer studies in the systems Fe0.008Ge1 ? x D x (D = As, Bi), Fe0.008Ge1 ? x In x , and Fe0.008Ge1 ? x Sn x . At room temperature magnetic interactions were observed for donor (D) impurities at the Fe site in the Fe0.008Ge system. No such magnetic ordering was observed for acceptor (In) or neutral (Sn) impurities. 相似文献
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Alain Pruvost François Becher Patrick Bardouille Catherine Guerrero Christophe Creminon Jean-François Delfraissy Cécile Goujard Jacques Grassi Henri Benech 《Rapid communications in mass spectrometry : RCM》2007,21(13):2167-2167
The original article to which this Erratum refers was published in Rapid Commun Mass Spectrom. 2001; 15 : 1401–1408. 相似文献