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Unsupervised Electric Motor Fault Detection by Using Deep Autoencoders

IEEE/CAA Journal of Automatica Sinica 2019年第2期6卷 441-451页

作者： Emanuele Principi damiano rossetti Stefano Squartini Francesco Piazza the Department of Information Engineering Università Politecnica delle Marche Loccioni Group Angeli di Rosora IEEE

Fault diagnosis of electric motors is a fundamental task for production line testing, and it is usually performed by experienced human operators. In the recent years, several methods have been proposed in the literature for detecting faults automatically. Deep neural networks have been successfully employed for this task, but, up to the authors' knowledge, they have never been used in an unsupervised scenario. This paper proposes an unsupervised method for diagnosing faults of electric motors by using a novelty detection approach based on deep autoencoders. In the proposed method, vibration signals are acquired by using accelerometers and processed to extract LogMel coefficients as features. Autoencoders are trained by using normal data only, i.e., data that do not contain faults. Three different autoencoders architectures have been evaluated: the multilayer perceptron(MLP) autoencoder, the convolutional neural network autoencoder, and the recurrent autoencoder composed of long short-term memory(LSTM) units. The experiments have been conducted by using a dataset created by the authors, and the proposed approaches have been compared to the one-class support vector machine(OC-SVM) algorithm. The performance has been evaluated in terms area under curve(AUC) of the receiver operating characteristic curve, and the results showed that all the autoencoder-based approaches outperform the OCSVM algorithm. Moreover, the MLP autoencoder is the most performing architecture, achieving an AUC equal to 99.11 %.

关键词： Autoencoder convolutional neural networks electric motor fault detection long short-term memory neural networks novelty detection

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Mature versus emerging technologies for CO2 capture in power plants： Key open issues in post-combustion amine scrubbing and in chemical looping combustion

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Frontiers of Chemical Science and Engineering 2018年第2期12卷 315-325页

作者： Giorgia De Guido Matteo Compagnoni Laura A. Pellegrini Ilenia rossetti Department of Chemistry Materials and Chemical Engineering "Giulio Natta" Politecnico di Milano Piazza Leonardo da Vinci 32 20133 MilanItaly Department of Chemistry Universita degli Studi di Milano INSTM Unit Milano-Universita and CNR-ISTM Via Camillo Golgi 19 20133 Milan Italy

Carbon capture and storage （CCS） have acquired an increasing importance in the debate on global wanning as a mean to decrease the environmental impact of energy conversion technologies, by capturing the CO2 produced from the use of fossil fuels in electricity generation and industrial processes. In this respect, post-combustion systems have received great attention as a possible near-term CO2 capture technology that can be retrofitted to existing power plants. This capture technology is, however, energy-intensive and results in large equipment sizes because of the large volumes of the flue gas to be treated. To cope with the demerits of other CCS technologies, the chemical looping combustion （CLC） process has been recently considered as a solution for CO2 separation. It is typically referred to as a technology without energy penalty. Indeed, in CLC the fuel and the combustion air are never mixed and the gases from the oxidation of the fuel （i.e., CO2 and H2O） leave the system as a separate stream and can be separated by condensation of H2O without any loss of energy. The key issue for the CLC process is to find a suitable oxygen carrier, which provides the fuel with the activated oxygen needed for combustion. The aim of this work is to explore the feasibility of using perovskites as oxygen carriers in CLC and to consider the possible advantages with respect to the scrubbing process with amines, a mature post-combustion technology for CO2 separation.

关键词： CO2 capture monoethanolamine chemical looping combustion oxygen carder perovskites

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Hypoallergenicity of a thickened hydrolyzed formula in children with cow’s milk allergy

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World Journal of Clinical Cases 2019年第16期7卷 2256-2268页

作者： Danilo rossetti Salvatore Cucchiara AlessANDra Morace Beatrice Leter Salvatore Oliva Department of Pediatrics Sapienza University of Rome

BACKGROUND Allergy to cow’s milk is the most frequent allergy occurring in infants and young *** dietary management of these patients consists of the elimination of any cow’s milk proteins from the diet,and for formula-fed infants,the substitution of the usual infant formula with an adapted formula that is generally based on extensively hydrolyzed cow’s milk *** American Academy of Pediatrics has established specific criteria to confirm the hypoallergenicity of a formula intended for these *** To assess the hypoallergenicity of a new thickened extensively hydrolyzed casein-based formula (TeHCF) in children with cow’s milk allergy (CMA).METHODS Children diagnosed with CMA through a double-blind placebo-controlled food challenge (DBPCFC) were randomly administered increased doses of a placebo formula or the TeHCF [Allernova,new thickener including fibres (Novalac)] under double-blind conditions and medical surveillance on two separate ***,both of these formulas and a cow’s milk-based formula were randomly introduced to children who were highly suspected of having CMA on three separate *** and late reactions occurring after the introduction of any of these formulas were thoroughly recorded by the physician at the hospital and reported by parents to the physician after hospital discharge,*** the children tolerated the TeHCF during the DBPCFC,they were exclusively fed this formula during a 3-mo period where potential allergic symptoms,anthropometric parameters,as secondary outcomes,and adverse events were *** Cow’s Milk-related Symptoms Score (CoMiSSTM) was assessed and anthropometric parameters were compared to World Health Organization (WHO) reference *** Of the 30 children included in the study,the CMA diagnosis of 29 (mean age: 8.03 ± 7.43 mo) patients was confirmed by a *** children all tolerated the TeHCF during both the challenge and the subsequent 3-mo feeding period,which the

关键词： Cow's milk allergy Hypoallergenicity Tolerance Thickened extensively hydrolyzed formula Digestive comfort Dietary management

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Topography,structural and exhumation history of the Admiralty Mountains region,northern Victoria Land,Antarctica

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Geoscience Frontiers 2020年第5期11卷 1841-1858页

作者： Maria Laura Balestrieri Valerio Olivetti Federico rossetti Cecile Gautheron Silvia Catto Massimiliano Zattin Istituto di Geoscienze e Georisorse Consiglio Nazionale delle RicercheSede Secondaria Firenzevia G.La Pira 450121FirenzeItaly Dipartimento di Geoscienze Universita di PadovaPadovaItaly Dipartimento di Scienze Universita degli Studi Roma 3RomaItaly GEOPS Univ.Paris SudCNRS Universite Paris-Saclay91405OrsayFrance

The Admiralty Mountains region forms the northern termination of the northern Victoria Land,*** quantitative data are available to reconstruct the Cenozoic morpho-tectonic evolution of this sector of the Antarctic plate,where the Admiralty Mountains region forms the northern termination of the western shoulder of the Mesozoic-Cenozoic West Antarctica Rift *** this study we combine new low-temperature thermochronological data(apatite fission-track and(U-Th-Sm)/He analyses)with structural and topography *** regional pattern of the fission-track ages shows a general tendency to older ages(80-60 Ma)associated with shortened mean track-lengths in the interior,and younger fission-track ages clustering at 38-26 Ma with long mean track-lengths in the coastal *** from other regions of Victoria Land,the younger ages are found as far as 50-70 km *** grain apatite(U-Th-Sm)/He ages cluster at 50-30 Ma with younger ages in the coastal *** analysis reveals that the Admiralty Mountains has high local relief,with an area close to the coast,180 km long and 70 km large,having the highest local relief of>2500 *** coincides with the location of the youngest fission-track *** shape of the area with highest local relief matches the shape of a recently detected low velocity zone beneath the northern TAM,indicating that high topography of the Admiralty Mountains region is likely sustained by a mantle thermal *** used the obtained constraints on the amount of removed crustal section to reconstruct back-eroded profiles and calculate the erosional load in order to test flexural uplift *** found that our back-eroded profiles are better reproduced by a constant elastic thickness of intermediate values(Te=20-30 km).This suggests that,beneath the Admiralty Mountains,the elastic properties of the lithosphere are different with respect to other TAM sectors,likely due to a stationary Cenozoic upper mantle thermal an

关键词： Antarctica Thermochronology Transantarctic mountains Rift margin uplift

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The role of dietary nitrate supplementation in neurovascular function

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Neural Regeneration Research 2021年第7期16卷 1419-1420页

作者： Masahiro Horiuchi Gabriella M.K.rossetti Samuel J.Oliver Division of Human Environmental Science Mount Fuji Research InstituteYamanashiJapan School of Sport Health and Exercise SciencesCollege of Human SciencesBangor UniversityBangorUK

A healthy diet combined with increased physical activity levels may protect against cerebrovascular dysfunction and cognitive impairments(Gorelick et al., 2011).Compared with the number of studies on the effects of physical activity, studies on how diet affects cerebral blood flow(CBF) regulation and cognitive function are relatively ***, we focus on the potential role of dietary nitrate supplementation in CBF regulation and cognitive function under normoxic and hypoxic conditions.

关键词： al. nitrate conditions.

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