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In opportunistic networks, messages are delivered based on a store-forward-carry paradigm. Network topology varies with time and dynamism of the links between nodes has a primary effect on the message delay, one of the network performance indicators. To get a precise estimation of the network latency with less complexity, a rigorous framework modeling the information propagation process is developed...
To effectively utilize wind energy, many learning-based autoregressive models have been proposed in the literature. Improving their short-term prediction accuracy, however, is difficult, which mainly result from the stochastic nature of wind. Moreover, the incorporation of seasonal effects to improve their accuracies has not been considered, as most reported studies only relied on relatively short...
Forecasting of energy consumption has always been an essential part of energy planning and policy. This paper presents grey model (GM), multiple regression model (MRM) and the integration model of grey model and multiple regression model (IGMMRM) to forecast the number and trend of energy consumption in Zhejiang. The three prediction models established are the highly accurate forecasting, but the...
A. new forecasting model based on HHT and combination of ANN is proposed in the paper. Load data can be decomposed into several IMF components and remainder by EMD firstly. Through calculating the spectrum of decomposed series by Hilbert transform algorithm, we can choose one appropriate forecasting model for each low frequency component, while use combination of ANN model for the high frequency component,...
Electricity consumption has always been one of the critical economic issues in Wenzhou. This paper presents a combination method of grey prediction models and multivariate statistical techniques to forecast the trend of electrical energy consumption in Wenzhou. Hierarchical cluster analysis and discriminant analysis grouped 18 sampling years into three clusters, i.e., relatively less electrical energy...
The ecological footprint of Zhejiang from 1997 to 2003 and the forecast models of ecological footprint and ecological capacity were calculated in the paper. Results showed that the ecological footprint per capita gradually increased from 1.2368 hm2 in 1997 to 1.3878 hm2 in 2003, and the ecological deficit increased from 0.7705 hm2 in 1997 to 0.9677 hm2 in 2003, and while the ecological capacity decreased...
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