Community overlays upon real-world complex networks |
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Authors: | X Ge H Wang |
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Institution: | 1.School of Information Science and technology,DaLian Maritime University,DaLian,P.R. China;2.Faculty of Electrical Engineering, Mathematics and Computer Science,Delft University of Technology,Delft,The Netherlands |
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Abstract: | An approximation for the dynamic structure factor
S(q, ω) of the linear harmonic chain with periodic
boundary conditions is obtained from a recurrence relation approach. It is compared with
(numerically) exact results for S(q, ω). Explicit
expressions for the moments of the structure factor are obtained from the short time
expansion up to order n = 12. For the long-wavelength as well as the
deep-inelastic limit, simple expressions are derived permitting to some extent analytic
results for S(q, ω). Introducing a linear regression, an
approximation scheme is defined which shows excellent agreement with the numerical
results. |
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Keywords: | |
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