A new approach is proposed for synthesizing the standard12-lead ECG from three differential leads formed by pairs of proximal electrodes on the body surface. The method is supported by a statistical analysis that gives the best personalized positions of electrodes. Our algorithm searches for optimal differential leads and the corresponding personalized transformation matrix that is used to synthesize the standard 12- lead ECG. The algorithm has been evaluated on 99 multichannel ECGs measured on 30 healthy subjects and 35 patients scheduled for elective cardiac surgery. It is shown that the algorithm significantly outperforms the synthesis based on the EASI lead system with medians of correlation coefficients greater than 0.954 for all 12 standard leads. The analysis shows that 3 is the optimal number of differential leads for practical applications.
COBISS.SI-ID: 24909607
A framework of hierarchical feature distribution for object matching in a network of visual sensors is proposed. In our approach, information is hierarchically distributed such that each individual node maintains only a small amount of information about the objects seen by the network. Nevertheless, this amount is sufficient to efficiently route queries through the network without any degradation of the matching performance. A set of requirements that have to be fulfilled by the object-matching method to be used in such a framework is defined. To show the performance of our approach four well-known, object-matching methods were mapped onto the hierarchical feature distribution scheme and tested using publically available data sets. The results show that the amount of data transmitted through the network can be significantly reduced in comparison to naive feature distribution schemes such as flooding.
COBISS.SI-ID: 8282452
In the paper we present a solution of a binary alloy solidification simulation (Al 4.5% Cu) under the realistic process conditions. We manage to successfully simulate the macrosegregation and for the first time we show that such an analysis is possible. The problem is solved by two completely different methods, our original local meshless and more classical FVM formulation. We show good results agreement and convergence behaviour. The article is a result of a bilateral cooperation project PROTEUS: Advanced modeling of solidification with the French research centre Institut Jean Lamour within the French project SMACKS.
COBISS.SI-ID: 1905659