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In order to know well about the system operating conditions, use FLUKE435 to carry out the harmonics survey of the Dongguan distribution network. The damage such as excess losses of the capacitors caused by different harmonics pollution were quantitative calculated based on the measured data. The results show that the harmonics cause great waste of energy and equipment resources.
Litter dynamics of grassland ecosystems was studied by modelling. Dynamics of litter production, decomposition and accumulation is described by a general mathematical model: dX(tt = g(t) -k (t X(t), where t is time,X (t) is litter biomass, g(t) is production rate and k(t) is decomposition rate. The litter long-term dynamics characters in grassland ecosystems were analysed.(1) If yearly decomposition...
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