Explore the spatial pattern of carbon emissions in urban functional zones: a case study of Pudong, Shanghai, China
In: Environmental science and pollution research: ESPR, Band 31, Heft 2, S. 2117-2128
ISSN: 1614-7499
8 Ergebnisse
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In: Environmental science and pollution research: ESPR, Band 31, Heft 2, S. 2117-2128
ISSN: 1614-7499
In: Children and youth services review: an international multidisciplinary review of the welfare of young people, Band 88, S. 96-102
ISSN: 0190-7409
In: Science and technology of nuclear installations, Band 2015, S. 1-15
ISSN: 1687-6083
Gear and bearing play an important role as key components of rotating machinery power transmission systems in nuclear power plants. Their state conditions are very important for safety and normal operation of entire nuclear power plant. Vibration based condition monitoring is more complicated for the gear and bearing of planetary gearbox than those of fixed-axis gearbox. Many theoretical and engineering challenges in planetary gearbox fault diagnosis have not yet been resolved which are of great importance for nuclear power plants. A detailed vibration condition monitoring review of planetary gearbox used in nuclear power plants is conducted in this paper. A new fault diagnosis method of planetary gearbox gears is proposed. Bearing fault data, bearing simulation data, and gear fault data are used to test the new method. Signals preprocessed using dilation-erosion gradient filter and fast Fourier transform for fault information extraction. The length of structuring element (SE) of dilation-erosion gradient filter is optimized by alpha stable distribution. Method experimental verification confirmed that parameter alpha is superior compared to kurtosis since it can reflect the form of entire signal and it cannot be influenced by noise similar to impulse.
In: Children and youth services review: an international multidisciplinary review of the welfare of young people, Band 95, S. 209-216
ISSN: 0190-7409
In: Child indicators research: the official journal of the International Society for Child Indicators, Band 12, Heft 4, S. 1147-1166
ISSN: 1874-8988
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 273, S. 116141
ISSN: 1090-2414
In: Children and youth services review: an international multidisciplinary review of the welfare of young people, Band 121, S. 105787
ISSN: 0190-7409
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