Search results for "pac"

Impact Evaluation of Innovative Selective Harmonic Mitigation Algorithm for Cascaded H-Bridge Inverter on IPMSM Drive Application

2021

This paper presents a detailed analysis of the use of a novel Harmonic Mitigation algorithm for Cascaded H-Bridge Multilevel Inverter in electrical drives for the transportation field. For this purpose, an enhanced mathematical model of Interior Permanent Magnet Synchronous Motor (IPMSM), that takes into account simultaneously saturation, cross-coupling, spatial harmonics, and iron loss effects, has been used. In detail, this model allows estimating accurately the efficiency and the torque ripple of the IPMSM, crucial parameters for transportation applications. Moreover, two traditional pulse width modulation strategies, Sinusoidal Phase-Shifted and Switching Frequency Optimal Phase-Shifted…

Stress sensitivity of stylolite morphology

2009

International audience; Stylolites are rough surfaces that form by localized stress-induced dissolution. Using a set of limestone rock samples collected at different depths from a vertical section in Cirque de Navacelles (France), we study the influence of the lithostatic stress on the stylolites morphology on the basis of a recent morphogenesis model. We measured the roughness of a series of bedding-parallel stylolites and show that their morphology exhibits a scaling invariance with two self-affine scaling regimes separated by a crossover-length (L) at the millimeter scale consistent with previous studies. The importance of the present contribution is to estimate the stylolite formation s…

When Social Media Influencers Go Political: An Exploratory Analysis on the Emergence of Political Topics Among Finnish Influencers

2022

Social media influencers are often understood as non-political actors who, due to the impact they exert on their followers’ purchase decisions and brand attitudes, play an important role in marketing and branding. In recent years, various influencers have addressed political issues during important political events such as elections. This political aspect of social media influencing has not received much scholarly interest thus far. In one of the first exploratory studies on the topic, we surveyed over one hundred Finnish influencers and investigated the degree to which they engaged with political topics. Our results show that political topics are commonly brought up among Finnish influence…

Personality characteristics related to interpersonal relations and self-perception measured by Rorschach (CS) and self-reported interpersonal problem…

1998

Some fixed point theorems for occasionally weakly compatible mappings in probabilistic semi-metric spaces

2009

We prove some common fixed point theorems in probabilistic semi-metric spaces for occasionally weakly compatible mappings satisfying a generalized contractive condition. We give also results of common fixed point for mappings satisfying a condition of integral type.

Automated Detection of Microaneurysms Using Scale-Adapted Blob Analysis and Semi-Supervised Learning

2014

International audience; Despite several attempts, automated detection of microaneurysm (MA) from digital fundus images still remains to be an open issue. This is due to the subtle nature of MAs against the surrounding tissues. In this paper, the microaneurysm detection problem is modeled as finding interest regions or blobs from an image and an automatic local-scale selection technique is presented. Several scale-adapted region descriptors are then introduced to characterize these blob regions. A semi-supervised based learning approach, which requires few manually annotated learning examples, is also proposed to train a classifier to detect true MAs. The developed system is built using only…

High precision numerical approach for Davey–Stewartson II type equations for Schwartz class initial data

2020

We present an efficient high-precision numerical approach for Davey–Stewartson (DS) II type equa- tions, treating initial data from the Schwartz class of smooth, rapidly decreasing functions. As with previous approaches, the presented code uses discrete Fourier transforms for the spatial dependence and Driscoll’s composite Runge–Kutta method for the time dependence. Since DS equations are non-local, nonlinear Schrödinger equations with a singular symbol for the non-locality, standard Fourier methods in practice only reach accuracy of the order of 10−6or less for typical examples. This was previously demonstrated for the defocusing integrable case by comparison with a numerical approach for …

La nature au supermarché Sur le packaging des produits dits biologiques

2015

Altri cibi. Il packaging degli alimenti veg

2017

Il tema di questo contributo riguarda il packaging dei prodotti vegani e vegetariani nel mercato italiano della distribuzione organizzata. La scelta degli ambiti del packaging della gdo e del vegetarianismo ha a che fare con le attuali tendenze dietetiche che, come spesso accade con le scelte e le mode alimentari, mentre si diffondono massivamente si intrecciano tra di loro. Se, infatti, in linea di principio l’astensione dal mangiare carne è il passaggio giusto e inevitabile per portare avanti coerentemente gli interessi degli esseri animali, ed è dunque espressione di una presa di posizione etico-politica animalista, è vero che cibi vegani e vegetariani sempre più spesso entrano a far par…

Il Grande Cretto di Gibellina

2022

The essay aims to make explicit the methodological criteria underlying the semiotic analysis of a space, taking as an example the case of the Grande Cretto that Alberto Burri realised in Gibellina in the second half of the 1980s. An impressive Land Art work that presents at first sight a series of clear-cut oppositions, but which on closer inspection calls them into question, rather emphasising gradations and nuances. The essay considers the discourses of space and those on space, the levels of the generative path, the plastic and figurative languages, showing how the analysis is the outcome of a continuous adjustment between the researcher and the text: the former engaged in constructing a…