Search results for "Lorenz"
showing 10 items of 70 documents
Global linear feedback control for the generalized Lorenz system
2006
Abstract In this paper we show how the chaotic behavior of the Chen system can be controlled via feedback technique. We design both a nonlinear feedback controller and a linear one which globally regulate the closed-loop system states to a given point. We finally show that our approach works also for the whole family of the generalized Lorenz system.
La facciata della chiesa di San Lorenzo a Trapani
2013
Il secondo ordine della facciata della cattedrale di San Lorenzo a Trapani, realizzata dal 1736 dall’architetto e trattatista Giovanni Amico, presenta un andamento sinuoso contenete diversi elementi di stereotomia, quali un arco in curva e due archi rampanti del tipo capo alzato.
Constitution and Truth. The controversy between Rafael de Vélez and Joaquín Lorenzo Villanueva with regards to the Apología del Trono
2017
This paper examines anti-liberal reactionary discourse in the first few years of the Spanish (liberal) Revolution. It is centred on the controversy that liberal congressman Joaquín Lorenzo Villanueva and publicist and Capuchin Friar Rafael de Vélez courted between 1820 and 1825. The sources used refer directly to the writings of both protagonists taking Friar Vélez’s «Apología del Trono» as their starting point. Methodologically, the analysis’ perspective adopts part of the theoretical consideration that critique of Liberalism, in its diverse manifestations, was an inherent part of the revolutionary process rather than a marginal element of it. Analysis of said writings reveals the historic…
Joaquín Lorenzo Villanueva (1757-1837): un paradigma del tránsito de la Ilustración al liberalismo
2020
Estudio de la vida y obra de Joaquín Lorenzo Villanueva (1757-1837), cuya biografía nos sirve de paradigma o referente de la crisis de la Ilustración española en el tránsito al liberalismo. El análisis de su vida y pensamiento ejemplifica las tensiones que hubo en el tránsito de un siglo a otro entre las viejas herencias del Antiguo Régimen y las nuevas ideas que aportaba la revolución liberal. Villanueva, como eclesiástico y hombre cercano a la Corte y al poder, ilustraba a la perfección las limitaciones de ese paso hacia el nuevo modelo de Estado y sociedad, al tiempo que es ejemplo del clero reformista, que dudaba en autoproclamarse “liberal” por temor a la carga simbólica de ese concept…
Time-delay control for stabilization of the Shapovalov mid-size firm model
2020
Control and stabilization of irregular and unstable behavior of dynamic systems (including chaotic processes) are interdisciplinary problems of interest to a variety of scientific fields and applications. Using the control methods allows improvements in forecasting the dynamics of unstable economic processes and offers opportunities for governments, central banks, and other policy makers to modify the behaviour of the economic system to achieve its best performance. One effective method for control of chaos and computation of unstable periodic orbits (UPOs) is the unstable delay feedback control (UDFC) approach, suggested by K. Pyragas. This paper proposes the application of the Pyragas' me…
La repercussió de l'obra de Lorenzo Palmireno en la filologia catalana
1991
It is always useful to set bounds to a semantic field when attempting to discuss lexical transmission. Once our attention is phocused on the names of birds collected by Palmireno in his Vocabulario del Humanista (1569), the influence of Belon, Gesner and specially of Joan B. Agnes becomes evident. On the other hand, it is also evident that the Catalan lexicographer Pere Torra (17th century) used in a rather indiscriminate manner Palmireno's work while assimilating in his Dictionnary words which on the base of their formal and / or their semantic structure can not be considered as Catalan. Some of these words have been nevertheless accepted by 20th century lexicographers.
Localization and dimension estimation of attractors in the Glukhovsky-Dolzhansky system
2016
Le parti e il tutto. La memoria dei Ciompi e la semantica del popolo
2020
Tra XIV e XV secolo nell’Italia comunale la natura del popolo rimaneva un problema aperto. A differenza di altre aree, a rendere più difficile nella Penisola lo sforzo di definizione era il fatto che dalla metà Duecento il «popolo» si era manifestato spesso anche come organizzazione di parte e persino come regime. Questo aveva esasperato la tradizionale ambivalenza semantica del termine («popolo» come parte della comunità e «popolo» come universale politico). In questo contributo vengono analizzati alcuni momenti della memoria della rivolta dei Ciompi (in particolare la cronaca di Giovanni Cavalcanti) per mostrare da un lato come si mantenne l’ambivalenza del termine, e dall’altro come prog…
THE SCENOGRAPHY OF SERPOTTA STUCCOES REVISITED - MATERIAL AND FORM
2015
The material that lies beneath the smooth shining surface of the stuccoes of the Serpotta family who used to work in Sicily from 1670 to 1730, has been thoroughly studied in previous papers, disclosing the deep, albeit empirical, knowledge of materials science that guided the artists in creating their masterpieces. In this work, attention is focused on the solid perspective and on the scenographic sculpture by Giacomo Serpotta, who is acknowledged as the leading exponent of the School. The study deals with some particular works of the artist, the “small-scaled plastic theatres”, so-called “teatrini”, which he made for the San Lorenzo Oratory in Palermo. On the basis of archival documents an…
Computing Difficulties for Deriving Poverty Indices from Some Functional Forms of Lorenz Curves
2014
We examine three families of classical one-parameter functional forms for estimating a Lorenz curve: the power form (Pareto, elementary form), the exponential form (Gupta, elementary form) and fractional form (Rohde). For the first time, we systematically study these functions not for their ability to be estimated but on the point of view of the possibility of deriving poverty indices, which implies first determining the headcount ratio (i.e., the percentage of poor). We show that computing difficulties have been largely underestimated. Two forms, the most simple ones, pose no problem: the elementary power and exponential forms. However, the Pareto functional form poses problem with a restr…