150 resultados para Bessel
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Bibliography: p. ix.
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Bibliography: p. [753]-788.
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Mode of access: Internet.
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Translation of O kořenech funkci Besselových, issued as čis. 28, roč. 29 (1920) of Rozpravy České akademie ved a uměmí, Trida II, Mathematicko-Přírodnická.
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Mode of access: Internet.
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Mode of access: Internet.
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Available on demand as hard copy or computer file from Cornell University Library.
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We report on recent progress in the generation of non-diffracting (Bessel) beams from semiconductor light sources including both edge-emitting and surface-emitting semiconductor lasers as well as light-emitting diodes (LEDs). Bessel beams at the power level of Watts with central lobe diameters of a few to tens of micrometers were achieved from compact and highly efficient lasers. The practicality of reducing the central lobe size of the Bessel beam generated with high-power broad-stripe semiconductor lasers and LEDs to a level unachievable by means of traditional focusing has been demonstrated. We also discuss an approach to exceed the limit of power density for the focusing of radiation with high beam propagation parameter M2. Finally, we consider the potential of the semiconductor lasers for applications in optical trapping/tweezing and the perspectives to replace their gas and solid-state laser counterparts for a range of implementations in optical manipulation towards lab-on-chip configurations. © 2014 Elsevier Ltd.
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We study the continuity of pseudo-differential operators on Bessel potential spaces Hs|p (Rn ), and on the corresponding Besov spaces B^(s,q)p (R ^n). The modulus of continuity ω we use is assumed to satisfy j≥0, ∑ [ω(2−j )Ω(2j )]2 < ∞ where Ω is a suitable positive function.
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2000 Mathematics Subject Classification: 33C10, 33-02, 60K25
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2000 Mathematics Subject Classification: 42B20, 42B25, 42B35
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Mathematics Subject Classification: Primary 35R10, Secondary 44A15
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Mathematics Subject Class.: 33C10,33D60,26D15,33D05,33D15,33D90
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2000 Math. Subject Classification: Primary 42B20, 42B25, 42B35
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Mathematics Subject Classification: 33D15, 44A10, 44A20