Search results for " multilevel"
showing 10 items of 65 documents
Il rinvio della fecondità in Italia e Ungheria: analogie e differenze
2008
Selective harmonic mitigation with asymmetrical staircase voltage waveform for a three-phase five-level Cascaded H-Bridge Inverter
2020
Selective harmonics elimination or mitigation strategies are used in all applications where it is necessary to rise the efficiency and reliability of the overall system. This paper presents a simple approach to reduce the low order harmonics amplitude of an asymmetrical staircase voltage waveform for a five-level, three-phase Cascaded H-Bridge Inverter without solving non-linear equations. Through this simple approach, polynomial equations to evaluate the control angels in real-time operations have been found. The effectiveness of the harmonic mitigation method has been tested through the simulation analysis in MatLab/PLECS environment.
Evolutionary Pathways of Political Representation in a Multi-Level Constitutional System: the Italian experience
2004
Il saggio cerca di studiare e individuare adeguati strumenti di raccordo e nuove forme di governance idonei ad assicuarare legittimità democratica ai sistemi politici complessi con particolare riferimento al sistema italiano profondamente mutato a seguito del processo di integrazione europea e dopo la riforma del titolo V della Costituzione italiana.
Modelling students' mobility in Italy: an analysis of the determinants by combining individual and aggregated data
The migratory phenomenon consisting in the enrolment of some students in a University different from the one nearest to their place of origin goes under the name of students’ mobility (SM). This phenomenon can be studied for different territorial aggregations, depending on the aims and the availability of data. In Italy several analyses have been carried out to detect the determinants of such a phenomenon. Two approaches are mostly followed. The former considers the analysis of aggregate data (AD) flows, and it is aimed at detecting the characteristics of the Universities and the territories in which they are situated, the latter analyzes the determinants of SM on the grounds of the student…
Consumption Patterns and Family Life-Cycle. Some Evidence from Italy
2015
As a social and economic entity the family is changing continuously. Changes in family size and composition have significant effects on the family decision making process. The Italian context is an interesting subject for research as a result of the impact of demographic and economic changes in the early 2000s on new family structures and economic behaviour. Furthermore, in Italy in contrast to the past, both men and women are aiming for job security and satisfaction before marrying and starting a family. In the light of that, it is particularly interesting to investigate if consumption behaviour changes along the life cycle stages. Considering different family life stages enables us to exp…
Prosociality and life satisfaction: A daily-diary investigation among Spanish university students
2018
Abstract With a diary study, we tested the positive effect of prosociality on life satisfaction. Fifty-six Spanish undergraduate students (45 females; Mage = 21.08 years) rated their life satisfaction, prosociality, self-esteem, and physical appearance for 5 consecutive days. Multilevel results indicated that within-individual positive deviations in prosociality (i.e., behaving more prosocial than usual) were uniquely and significantly associated with higher life satisfaction on that specific day. Students' self-esteem, physical appearance, and positive daily events were also predictive of life satisfaction. Exploratory analyses revealed that the positive effect of prosociality on life sati…
Novel Computational Method for Harmonic Mitigation for Three-phase Five-level Cascaded H-Bridge Inverter
2018
The efficiency of the system is a very important parameter for high power electrical drives applications,. Moreover, in the system the efficiency of the power converter play a fundamental role and for this reason, the soft switching modulation techniques represent the best choice. This paper presents a novel computational method for harmonic mitigation on the output voltage of a five-level, three-phase Cascaded H-Bridge Inverter without solving non-linear equations. Through this simple approach the Working Areas have been identified in which the harmonics reference have minimum amplitude possible. Moreover, polynomial equations to evaluate the control angels have been found. In this way, th…
Overview and experimental analysis of MC SPWM techniques for single-phase five level cascaded H-bridge FPGA controller-based
2016
This paper presents an overview and experimental analysis of the MC SPWM techniques for single-phase cascaded H-bridge inverter. The multilevel power converters are an alternative to traditional converters known as “three-level converters”. The voltage waveforms and the related frequency spectra, which have been obtained by simulation analysis in Matlab-Simulink environment, are here reported for all the proposed modulation techniques. The simulation results have been experimentally validated through means of a DC/AC, five-level, single-phase converter prototype with an appropriate test bench.
Tutela e sicurezza del lavoro tra centro e periferia: la sicurezza sui luoghi di lavoro
2013
Il saggio prende in esame la complessa questione del riparto di competenze tra Stato e Regioni alla luce del Titolo V della Costituzione in materia di salute e sicurezza sui luoghi di lavoro. Il riparto di competenze tra centro e periferia è stato oggetto di una limitata analisi da parte della dottrina e della giurisprudenza, che si sono concentrate in particolare sulla disciplina del mercato del lavoro. L’Autore descrive un sistema multilivello, caratterizzato dalla compresenza di fonti nazionali e regionali, della contrattazione collettiva, nonché di codici di condotta. Sulla scorta di una ricostruzione del quadro normativo e dei percorsi della giurisprudenza, il saggio propone una lettur…
The Introduction of the “Balanced Budget” Principle into the Italian Constitution: What Perspectives for the Financial Autonomy of Regional and Local…
2013
This paper analyses the impact on regional and local authorities of Articles 117 and 119 of the Italian Constitution as amended by Constitutional Law no. 1/2012. In particular, it attempts to verify whether the new formulation of these constitutional provisions materializes the risk of a significant reduction in the financial autonomy of both Regions and Local Governments. With the constitutional reform the legislative competence of “harmonization of public account” has become an exclusive State competence, the “balanced budget” principle has been extended to Regions and local authorities and public borrowing has been broadly prohibited. What is the actual significance of the changes introd…