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Numerous works have investigated the vulnerability of Global Navigation Satellite Systems (GNSS) against attacks. Upcoming systems make provisions for cryptographic civilian signal protection. However, this alone does not fully protect GNSS-based localization. In this paper, we show that attacks at the physical layer, without modification of navigation messages, can be severely effective. We analyze...
Facing the requirement of the virtual pedagogy application to have the ability of evaluating English learners' pronunciation quality, the paper proposes an automatic assessment method based on a bimodal fusion decision algorithm. The pronunciation level is scored by comparing the similarity between learner and standard's audio and video speech signals separately. The final score of the learner's pronunciation...
Safety evaluation is a complex problem that is often faced by decision makers in the power supply enterprises. It has a significant impact on the safety of power industry. Safety evaluation in power supply enterprises is a multiple criteria decision making (MCDM) problem. The evaluation model is constructed according to China State Grid's regulation. A hybrid of elimination et choice translating reality...
In order to forecast power futures price exactly, a radial basis function neural network (RBF NN) method is used in this paper. The RBF NN method has the advantages of rapid training, generality and simplicity over feed-forward neural network. The data of Nordic electricity market is adopted for case analysis. Empirical results reveal that the RBF NN method has a more accurate result than back-propagation...
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