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Torque production mechanism of switched reluctance machines with field modulation principle

中国科学:技术科学英文版 2023年第9期66卷 2743-2754页

作者： SUN YuHua ZHAO WenXiang JI JingHua LING ZhiJian CHEN YiFan bianchi nicola School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013China School of Industrial Engineering University of PadovaPadova 35131Italy

This paper aims to investigate the torque production mechanism and its improvement design in switched reluctance machines(SRMs) based on field modulation principle. Firstly, the analytical expressions of the air-gap magnetic field are derived from the perspective of DC-and AC-components, respectively. Meanwhile, different slot/pole combinations and winding arrangements are considered. Secondly, the torque productions are analyzed and evaluated with emphasis on the interaction between the DCand AC-components of air-gap fields. Thirdly, the 12-slot/8-pole and 12-slot/10-pole SRMs are established and studied by using the finite-element method. The effects of slot/pole combination and winding arrangement on the average torque production are clarified. Then, two new designs to improve the average torque are proposed. Finally, the prototype of the 12-slot/10-pole SRM is manufactured, and the experiments are carried out for validation.

关键词： switched reluctance machine(SRM) slot/pole combination winding arrangement torque field modulation principle

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Electric Drive for an In-wheel Fractional-slot Axial Flux Machine

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电力电子技术 2008年第10期42卷 7-10页

作者： Luigi Alberti nicola bianchi Department of Electrical Engineering University of Padova via Gradenigo 61A 1-35131 Padova Italy

This paper describes the electric drive for an in-wheel fractional-slot axial flux machine,designed for achieving a wide flux-weakening operating *** using a slotted stator with fractional-slot windings and additional cores enclosing end windings,the axial flux machine reaches a wide constant power speed *** machine is designed for increasing flux-weakening capability while obtaining low harmonic back-electromotive force and low cogging torque.A 10 N.m axial flux machine exhibiting 3 to 1 flux-weakening speed range has been built.A flux-weakening controller,able to maximize the output torque in the flux-weakening region,is designed and *** goodness of both design and control algorithm is proved by experimental ***,such a fractional-slot machine has not only *** losses are very high,and they have to be properly considered during the design process.

关键词：电气传动技术轴向磁机电子技术传动系统

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Levels of Mercury and Polychlorobiphenyls in Bluefin Tuna from the Western Mediterranean Sea: A Food Safety Issue?

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Journal of Environmental Protection 2014年第2期5卷 106-113页

作者： Monia Renzi Alessandro Cau nicola bianchi Silvano E. Focardi Department of Biological and Environmental Sciences and Technologies University of the Salento Lecce Italy Department of Life and Environmental Sciences University of Cagliari Cagliari Italy Department of Physical Hearth and Environmental Sciences University of Siena Siena Italy

In this paper, the presence and amount of mercury and polychlorobiphenyls (PCBs) were determined in 23 bluefin tuna samples collected in the spring of 2012 in Porto Scuso (South West Sardinia, Italy) and Villa Putzu (South East Sardinia, Italy) in order to assess the current levels of these two contaminants in fish muscle and the consequent risk to humans consuming said fish. Values of polychlorobiphenyls in bluefin tuna muscle vary between 0.155 and 1.403 mg/kg f.w.;the average of PCBs in tuna muscle is 0.732 mg/kg f.w. With regard to PCBs the presence of more elevated concentrations is confirmed in larger fish. The results regarding mercury in muscle show an average of 0.660 mg/kg f.w. and mercury values vary between 0.140 f.w. and 2.211 mg/kg f.w.;for mercury as well, the highest concentrations were found in the largest bluefin tuna. Six samples, 26% of total, contained more than 1 mg/kg f.w., which is the maximum level set by the European Commission (EC, Regulation n. 1881/2006) for this species. Mercury, in particular methylmercury, poses a risk to public health, therefore, taking into account the important nutritional contribution that tuna fish makes to the diet, it is advisable that women of childbearing age, pregnant and breastfeeding women as well as young children strictly limit their consumption of tuna from this area of the Mediterranean.

关键词： Bluefin Tuna Human Consumption Mercury PCBs

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Current trends and perspectives in interventional radiology for gastrointestinal cancers

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World Journal of Radiology 2021年第10期13卷 314-326页

作者： Elisa Reitano nicola de'Angelis Giorgio bianchi Letizia Laera Stavros Spiliopoulos Roberto Calbi Riccardo Memeo Riccardo Inchingolo Division of General Surgery Department of Translational MedicineUniversity of Eastern PiedmontNovara 28100Italy Unit of Minimally Invasive and Robotic Digestive Surgery "F.Miulli"General Regional HospitalAcquaviva delle Fonti 70021Italy Department of Oncology "F.Miulli"General Regional HospitalAcquaviva delle Fonti 70021Italy 2^(nd) Department of Radiology School of MedicineNational and Kapodistrian University of AthensAthens 12461Greece Department of Radiology "F.Miulli"General Regional HospitalAcquaviva delle Fonti 70124Italy Unit of Hepato-Pancreatic-Biliary Surgery "F.Miulli"General Regional HospitalAcquaviva delle Fonti 70021Italy Interventional Radiology Unit "F.Miulli"General Regional HospitalAcquaviva delle Fonti 70021Italy

Gastrointestinal(GI)cancers often require a multidisciplinary approach involving surgeons,endoscopists,oncologists,and interventional radiologists to diagnose and treat primitive cancers,metastases,and related *** this context,interventional radiology(IR)represents a useful minimally-invasive tool allowing to reach lesions that are not easily approachable with other *** the last years,through the development of new devices,IR has become increasingly relevant in the context of a more comprehensive management of the oncologic *** embolization,ablative techniques,and gene therapy represent useful and innovative IR tools in GI cancer ***,IR can be useful for the management of GI cancer-related complications,such as bleeding,abscesses,GI obstructions,and neurological *** aim of this study is to show the principal IR techniques for the diagnosis and treatment of GI cancers and related complications,as well as to describe the future perspectives of IR in this oncologic field.

关键词： Interventional radiology Radiology Colorectal cancer Gastric cancer Malignancy Embolization

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Clinical and economic impact of infliximab one-hour infusion protocol in patients with inflammatory bowel diseases:A multicenter study

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World Journal of Gastrointestinal Pharmacology and Therapeutics 2017年第2期8卷 131-136页

作者： Anna Viola Giuseppe Costantino Antonino Carlo Privitera Fabrizio Bossa Angelo Lauria Laurino Grossi Maria Beatrice Principi nicola Della Valle Maria Cappello Gastroenterology and Hepatology Section Dipartimento Biomedico di Medicina Interna e Specialistica University of Palermo IBD Unit Dipartimento di Medicina Interna e Terapia Medica University of Messina IBD and PelvicF loor Unit Azienda Ospedaliera per l’Emergenza Ospedale Cannizzaro Gastroenterology Section Casa Sollievo della Sofferenza S. Giovanni Rotondo Gastroenterology and Endoscopy Unit A.O.Bianchi-Melacrino-Morelli Fisiopatologia Digestiva Ospedale Spirito Santo Gastroenterology Section Gastroenterologia

AIM To assess the impact of short infliximab(IFX) infusion on hospital resource utilization and *** All inflammatory bowel diseases(IBD) patients who received IFX 1 h infusion from March 2007 to September 2014 in eight centers from Southern Italy were included in the analysis. Demographic, clinical and infusion related data were collected. The potential benefits related to the short infusion protocol were assessed both in terms of time saving and increased infusion unit capacity. In addition, indirect patient-related cost savings were *** One hundred and twenty-five patients were recruited(64 with ulcerative colitis and 61 with Crohn's disease). Median duration of disease was of 53 mo and mean age of pts at diagnosis was of 34 years(SD: ± 13). Adverse infusion reactions were reported in less than 4% both before and after short infusion. The total number of infusions across the selected centers was of 2501(30.5% short infusions). In the analyzed cohort, 1143 h were saved(762 in the infusion and 381 in observation phases) through the rapid IFX infusion protocol. This time saving(-15% compared to the standard protocol in infusion phase) represents, from the hospital perspective, an opportunity to optimize infusion unit capacity by allocating the saved time in alternative cost-effective treatments. This is the case of opportunity cost that represents the value of forgone benefit which could be obtained from a resource in its next-best alternative use. Hence, an extra hour of infusion in the case of standard 2-h IFX represents a loss in opportunity to provide other cost effective services. The analysis showed that the short infusion increased the infusion units capacity up to 50% on days when the IFX infusions were scheduled(infusion phase). Furthermore, the analysis showed that the short IFX infusion protocol leads to time savings also in the post-infusion phase(observation) leading to a time saving of 10% on average among the analyzed centers. F

关键词： Infliximab One-hour infusion Cost savings Economic impact Multicenter study

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