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Based on the real situation of radio telegraphic training and using the net classroom, this paper proposes a design of radio telegraphic training and an assessment system which adopts C/S mode. It conducts careful analysis on various key technologies, such as manual key keying signal processing, MORSE code store-and-forward and intersystem data interaction, and put forwards corresponding solutions...
Recently, more and more research is devoted for ontology in the semantic web domain. Firstly, a method for choosing the set of candidate similar concepts is presented based on ontology graphical structural features and data mining. Secondly, a calculation method of conceptual similarity is proposed based on the characteristics of the concept ontology and information content. Finally, the optimized...
The bearing and range estimation of near-field sources is studied and a novel method is presented. In our proposed algorithm the second-order statistics was used to estimate bearing of near-field sources. By exploiting the Toeplitz property of covariance matrix of far-field sources, we reconstruct a far-field approximate covariance matrix with respect to bearing only for near-field sources, which...
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