187,652 research outputs found
Galileo's Mathematization of Nature at the Crossroad between the Empiricist and the Kantian Tradition
No full textIntroduzione al calcolo differenziale colla teorica dei massimi e minimi
No full textIntroduzione al calcolo differenziale colla teorica dei massimi e minimi / Luigi Pedrotti. - Milano : Sonzogno, 1907. - 62 p. ; 17 cm
Fa parte della collana: Biblioteca del popol
Introduzione al calcolo differenziale colla teorica dei massimi e minimi
No full textIntroduzione al calcolo differenziale colla teorica dei massimi e minimi / Luigi Pedrotti. - Milano : Sonzogno, 1907. - 62 p. ; 17 cm
Fa parte della collana: Biblioteca del popol
Modelling of structures made of filiform beams: Development of a curved finite element for wires
No full textThis paper presents a finite element formulation of curved thin beams, useful for modelling structures made of filiform elements. The proposed element is intended to model structures formed by several wires, subjected to very large bending displacements so that their final shapes can be completely different from the original ones. The model is based on the description of the planar wire geometry through the integration of the radius of curvature, which is approximated by means of a cubic polynomial. The solution of an overdetermined system is necessary to compute the coefficients of the polynomial. This approach allows determining the stiffness matrix of the curved wire in closed form, through the application of Castigliano's Theorem. A technique for automatic remeshing during large deformations, based on the curvature change, is also discussed in the paper. To validate the model refined finite element analyses and an experimental test have been carried out. The solution is performed analytically, and it allows to identify the actual stiffness matrix of a curved wire, considering only the degrees of freedom at the ends
Il valore aggiunto nell'Italia delle province. Struttura e distribuzione nelle regioni Lazio, Abruzzo e Molise
No full text
Abitazioni e pressione residenziale. Il non occupato abitativo come discriminante spaziale nelle aree urbane italiane
No full textDeep Learning Methods for Space Situational Awareness in Mega-Constellations Satellite-Based Internet of Things Networks
No full textArtificial Intelligence of things (AIoT) is the combination of Artificial Intelligence (AI) technologies and the Internet of Things (IoT) infrastructure. AI deals with the devices’ learning process to acquire knowledge from data and experience, while IoT concerns devices interacting with each other using the Internet. AIoT has been proven to be a very effective paradigm for several existing applications as well as for new areas, especially in the field of satellite communication systems with mega-constellations. When AIoT meets space communications efficiently, we have interesting uses of AI for Satellite IoT (SIoT). In fact, the number of space debris is continuously increasing as well as the risk of space collisions, and this poses a significant threat to the sustainability and safety of space operations that must be carefully and efficiently addressed to avoid critical damage to the SIoT networks. This paper aims to provide a systematic survey of the state of the art, challenges, and perspectives on the use of deep learning methods for space situational awareness (SSA) object detection and classification. The contributions of this paper can be summarized as follows: (i) we outline using AI algorithms, and in particular, deep learning (DL) methods, the possibility of identifying the nature/type of spatial objects by processing signals from radars; (ii) we present a comprehensive taxonomy of DL-based methods applied to SSA object detection and classification, as well as their characteristics, and implementation issues
Introduzione al calcolo differenziale colla teorica dei massimi e minimi
No full textIntroduzione al calcolo differenziale colla teorica dei massimi e minimi / Luigi Pedrotti. - Milano : Sonzogno, 1907. - 62 p. ; 17 cm
Fa parte della collana: Biblioteca del popol
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