Search results for "input"
showing 10 items of 213 documents
Chapter 24 Bihemispheric plasticity after acute hand deafferentation
2003
Publisher Summary This chapter summarizes experiments showing that deprivation of somatosensory input could also elicit organizational changes in the hemisphere contralateral to the deafferented one. The existence of interactions among homotopic sites within cortical representations in both hemispheres provides a substrate for such an effect. It has been proposed that chronic deafferentation, in association with long-term practice as in blind, deaf, or individuals with amputation results in compensatory gains in the same and in other sensory modalities. However, the long-term changes described are mild and the question whether blind or deaf people develop enhanced capacities of their remain…
Input-output finite-time stability of positive switched linear systems with state delays
2013
This paper is concerned with the problem of input-output finite-time stability (IO-FTS) for a class of discrete-time positive switched systems with time-varying delays. Two sufficient conditions for the existence of IO-FTS of such systems with respect to two different input signals are presented, respectively. All the results obtained are formulated in a set of linear inequalities. Two numerical examples are given to illustrate the effectiveness of the proposed results.
Confronto tra la nematofauna delle monoculture di mais e quella dei sistemi erbacei
2023
Gli studi sugli effetti dell'agricoltura sulla biodiversità del suolo sono diventati molto importanti, al fine di proteggere la salute dell'ambiente e migliorare la qualità dell'agricoltura. Le comunità di nematodi hanno dimostrato di offrire un potente strumento ecologico per valutare gli effetti delle pratiche agricole sul suolo. La ricerca è stata condotta in una monocoltura di mais (della durata di 20 anni) e in un ecosistema erbaceo seminaturale, dominato da Festuca spp. e Trifolium spp.. Ciascun sistema è stato sottoposto a due diverse pratiche di gestione delle colture (input alto (H) e basso (L)). L'obiettivo era quindi quello di studiare gli effetti di due diversi ecosistemi e dive…
Influence of seabird guano on the contamination level of a Sicilian coastal area (Marinello ponds).
2010
A technique for the dynamic identification of civil systems
2012
A statistical moments based approach for the dynamic identification of civil structures
2012
In recent years, interest in developing identification techniques that are valid in the case of unmeasured input has increased. In this field some interesting parametric approaches have been proposed. Nevertheless, the improvement of the available techniques or the formulation of new techniques is desirable. In this paper a time domain dynamic identification approach based on the statistical moments of the response of civil structures under base random excitations is discussed. Two types of models are used: the classically damped models characterized by mass proportional damping and the so-called “potential models” which are non linear in damping and stiffness. By applying the Itô different…
Robust Discrete-Time Lateral Control of Racecars by Unknown Input Observers
2023
This brief addresses the robust lateral control problem for self-driving racecars. It proposes a discrete-time estimation and control solution consisting of a delayed unknown input-state observer (UIO) and a robust tracking controller. Based on a nominal vehicle model, describing its motion with respect to a generic desired trajectory and requiring no information about the surrounding environment, the observer reconstructs the total force disturbance signal, resulting from imperfect knowledge of the time-varying tire-road interface characteristics, presence of other vehicles nearby, wind gusts, and other model uncertainty. Then, the controller actively compensates the estimated force and as…
3D Map Computation from Historical Stereo Photographs of Florence
2018
The analysis of early photographic sources is fundamental for documenting and understanding the evolution of a city so rich in history and art as Florence. Indeed, by the 1860s several photographers used to work in town, and their images (often obtained through stereoscopic set-ups) can help us to reconstruct Florence in 3D as it was by the time of the Italian unification. The first and most delicate part of such reconstruction process is the computation of disparity maps from the historical stereo pairs. This is a very challenging task for fully-automatic computer vision algorithms, since XIX century photographs are affected by several problems—ranging from superficial damages to asynchron…
A dynamic model to value the economic impact and the economic sustainability of tourism in a resort area
2007
The systemic approach in studying tourism is firmly accepted in literature because of the complexity of the topic both from the supply side (the heterogeneity of goods and services making the tourism product) and the demand side (not every operator in the tourism network chain has a direct contact with tourists). To face this complexity the Input-Output analysis, theorized by Wassily Leontief, is widely used in empirical studies of tourism. Yet, in spite of such a diffusion and importance in tourism literature, the Input-Output models have several limits. In order to overcome some of these limits, the static Input-Output analysis is translated into a dynamic one by making use of System Dyna…
Dependence of 85Kr(β)-Clearance rCBF Determination on the Input Function
1969
Two procedures have been proposed for the quantitative determination of rCBF by analysis of radioactive inert gas clearance curves, following intra-arterial injection: 1. the slope-method [1], 2. the height-over-area-method [4].