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Fractal-based autonomous partial discharge pattern recognition method for mV motors

High Voltage 2018年第2期3卷 103-114页

作者： Zhuo ma Yang Yang martin Kearns Kevin Cowan Huajie Yi donald m.hepburn Chengke Zhou School of Engineering and Built Environment Glasgow Caledonian UniversityGlasgowG40BAUK Electrical System Group Engineering DivisionNuclear GenerationEDF EnergyGlasgowG745PGUK

On-line partial discharge(PD)monitoring is being increasingly adopted to improve the asset management and maintenance of medium-voltage(mV)*** study presents a novel method for autonomous analysis and classification of motor PD patterns in situations where a phase-reference voltage waveform is not *** main contributions include a polar PD(PPD)pattern and a fractal theory-based autonomous PD recognition *** pattern that is applied to convert the traditional phase-resolved PD pattern into a circular form addresses the lack of phase information in on-line PD monitoring *** fractal theory is then presented in detail to address the task of discrimination of 6 kinds of single source and 15 kinds of multi-source PD patterns related to motors,as outlined in IEC *** classification of known and unknown defects is calculated by a method known as centre *** of the proposed method is demonstrated using data from laboratory experiments on three typical PD *** study also discusses the application of the proposed techniques with 24 sets of on-site PD measurement data from 4 motors in 2 nuclear power *** results show that the proposed method performs effectively in recognising not only the single-source PD but also multi-source PDs.

关键词： method autonomous fractal

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Observation of Touch in Residential Aged Care

Observation of Touch in Residential Aged Care

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The 8th Asia/Oceania Regional Congress of Gerontology and Geriatrics

作者： Lynette m.Reid Louise A.martin Complementary Therapy hepburn Health Service DaylesfordAustralia Education hepburn Health Service DaylesfordAustralia

＜正＞A research project was conducted at hepburn Health Service to observe touching of residents in nursing care situations other than during routine clinical *** nursing home residents experience social isolation, l... 详细信息

关键词： Touch isolation loneliness communication comfort

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