Search results for "Modell"
showing 10 items of 2134 documents
Rilievo e monitoraggio di architetture storiche: il caso studio di Villa Lampedusa ai Colli a Palermo
2014
Il rilievo e il monitoraggio delle architetture storiche che versano in un stato di abbandono e degrado rappresentano delle fasi fondamentali per la corretta progettazione di interventi di recupero e di riqualificazione. In particolare, Villa Lampedusa ai Colli, storica residenza palermitana situata nella Piana dei Colli, rappresenta un tipico esempio di questa situazione. Per questo motivo la villa è stata scelta come luogo per sperimentare approcci di rilievo integrato con tecniche fotogrammetriche terrestri e da UAV. Il lavoro svolto ha permesso di realizzare una dettagliata ricostruzione tridimensionale dell’esterno della villa e di valutare lo stato di degrado dell’edificio utilizzando…
Tecniche fotogrammetriche digitali per la conservazione e il restauro di apparati decorativi
2009
The paper describes the photogrammetric survey of the frescoes in the church of Saints Cosma and Damiano in Cefalù and in the “Sala della Fontana” of the “Palazzo della Zisa” in Palermo. The use of the digital photogrammetry, besides guaranteeing the precision and the reliability of the measurements, allow a simplification of the operations for investigate the state of conservation. The photogrammetric operations have been carried out in different way in consideration of the different logistic situation. The interior of the Church of the Saints Cosma and Damiano didn't introduce particular problems of accessibility; the frescoes were situated in an enough favourable position for topographic…
Valutazioni sull'impiego della fotogrammetria sferica nella costruzione di modelli digitali 3D: l’oratorio della chiesa di Santa Caterina a Zejtun (M…
2013
L’utilizzo di immagini sferiche per la documentazione dell’architettura è una realtà ormai da tempo consolidata, tuttavia solo di recente si assiste all’implementazione di procedure e allo sviluppo di software per l’estrazione di informazioni metriche da manufatti architettonici. Il presente contributo indaga l’efficacia e le potenzialità d’impiego delle immagini sferiche nella fotogrammetria digitale per la costruzione di modelli 3D attraverso tecniche di image-based 3D modeling utilizzando dati metrici acquisiti nell’ambito di uno studio su manufatti in pietra da taglio maltesi realizzati tra il XVI e XVIII secolo. Nello specifico si descrivono le procedure di modellazione e comparazione …
Multifractal models and their formal properties in urban geography
2019
International audience; Fractal analysis for exploring the spatial organization of settlement patterns is used since a coupleof years. On the one hand, scaling behavior turned out to be a suitable approach for characterizingsuch patterns, but town sections, issued from different periods of urban history or corresponding toparticular planning concepts show different types of scaling behavior what aided classifying urbanpatterns. However, on the scale of agglomerations these different scaling behaviors are mixed. Thatincites asking whether multifractal approaches could be of interest when considering urban patternsor settlement systems, as local properties like different degrees of concentrat…
Design of Measurement-Based Stochastic Wideband MIMO Channel Simulators
2009
In this paper, we propose a method for designing measurement-based stochastic models for simulating wideband multiple-input multiple-output (MIMO) wireless channels. The proposed method allows synthesizing channel transfer functions with the spatial-temporal-frequency correlation properties approximating those of real-world radio channels. The parameters of a channel simulator are determined by fitting the space-timefrequency cross-correlation matrix of the simulation model to the estimated space-time-frequency cross-correlation matrix of a physical channel. For this purpose, an iterative parameter computation algorithm has been developed. The proposed design method is verified by creating …
Fuzzy Discrete Event Simulation for Fuzzy Production Systems Analysis
1998
Abstract Fuzzy production systems are characterised by vagueness in data and requirements that very often cannot be reduced to stochastic models. Therefore, such production systems cannot be analysed by using classical techniques such as Queue Theory or Discrete Simulation Analysis. On the other hand the great diffusion of Fuzzy Production environments in small and medium enterprises claims for the development of new analysis tools. This paper proposes a new approach to Discrete Event Simulation able to treat with fuzzy variables. A new methodology has been proposed to process fuzzy information within discrete event simulation and a prototype of a Fuzzy Discrete Event Simulator has been dev…
Optimization Under Fuzzy Max-t-Norm Relation Constraints
2019
Fuzzy relation equations and inequalities play an important role in many tools of fuzzy modelling and have been extensively studied. In many practical applications they are used as constraints in optimization. Algorithms for specific objective functions have been proposed by many authors. In this paper we introduce a method to convert a system of fuzzy relation constraints with max-t-norm composition to a linear constraint system by adding integer variables. A numerical example is provided to illustrate the proposed method.
Aspects and Potentiality of Unconventional Modelling of Processes in Sporting Events
1999
This paper describes how inexact processes as presented in sporting events can be recorded, analysed, and evaluated by means of neural networks and fuzzy modelling.
Gestione dell’irrigazione del vigneto attraverso l’uso di modelli di simulazione e misure di campo.
2008
In the paper the applicability of a numerical model, i.e. SWAP (Soil Water Atmosphere Plant), and a functional model, i.e. FAO 56, for irrigation scheduling is assessed. Model validation was initially carried out through the comparison between simulated and measured water content of a soil profile. The two models were then used in order to verify the possibility to simulate the typical irrigation management of the study area. In particular, the attitude of the two models to simulate the number and the distribution of watering, as well as the seasonal water consumption found in the ordinary management irrigation was assessed. Different scenarios of irrigation management allowed the analysis …
A new plant wide modelling approach for the reduction of greenhouse Gas emission from wastewater treatment plants
2017
Recent studies about greenhouse gas (GHG) emissions show that sewer collection systems and wastewater treatment plants (WWTPs) are anthropogenic GHG potential sources. Therefore, they contribute to the climate change and air pollution. This increasing interest towards climate change has led to the development of new tools for WWTP design and management. This paper presents the first results of a research project aiming at setting-up an innovative mathematical model platform for the design and management of WWTPs. More specifically, the study presents the project’s strategy aimed at setting-up a plant-wide mathematical model which can be used as a tool for reducing/controlling GHG from WWTP.…