Scientific Reports
The preprint collection of the Department of Mathematics.
Full-text generally not available for preprints prior to may 2006.
Found 866 products
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QDD2 - 06/14/2006
Klee, V. ; Maluta, E. ; Zanco, C.
Basic properties of evenly convex sets | Abstract | | A subset of a finite-dimensional real vector space is called evenly convex if it is the intersection of a collection of open halfspaces. The study of such sets was initiated in 1952 by Werner Fenchel, who defined a natural polarity operation and mentioned
some of its properties. Over the years since then, evenly convex sets have made occasional appearances in the literature but there has been no systematic study of their basic properties. Such a
study is undertaken in the present paper. |
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QDD1 - 05/16/2006
Salvati, S. ; Fumagalli, E. ; Lo Schiavo, L. ; Secchi, P.
Analysis Of The Methodology Adopted By The Italian Regulatory Authority For Identifying Major Event Days | Abstract | | The Italian regulatory mechanism for quality of service in electricity distribution links the tariff to the SAIDI indicator, net of contributions from exceptional events. In the year 2004 a two-step statistical methodology was introduced to identify major event days (MEDs). This statistical criterion defines a potential MED as a day with a daily CAIDI greater than the mean plus one standard deviation of the annual distribution of daily CAIDI for the relevant spatial unit, the territorial district; within this subset, a MED is a day with a daily SAIDI greater than the mean plus three standard deviations of the daily SAIDI distribution. A one year experience with this approach confirms its validity and suggests an alternative definition of the first step. The suggested definition is still based on a model-free statistical approach, but refers instead to percentiles. This modification would enhance the robustness of the method and enable to drop a currently necessary ex-post adjustment of the regulatory procedure. |
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QDD5 - 05/01/2006
Caliò, F. ; Marchetti, E.; Muresan, V.
On some Volterra-Fredholm integral equations
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650-P - 01/01/2006
Masiero Federica
Regularizing properties for transition semigroups and semilinear parabolic equations in Banach spaces
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648-P - 12/01/2005
Frezzotti, Aldo
A Numerical Investigation of the Steady Evaporation of a Polyatomic Gas
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649-P - 12/01/2005
Gregoratti, Matteo
A Universal Dilation of Discrete Markov Evolutions
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640-P - 11/01/2005
Collini, Tiziana ; Prouse, Giovanni ; Bottero, Chiara
On a mathematical model relative to the doping of semiconductors
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643-P - 11/01/2005
Bacchelli, Valeria ; Vessella, Sergio
Lipschitz Stability for a Stationary 2-D Inverse Problem with Unknow Polygonal Boundary
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