Knowledge Organization and Its Role in Temporal and Causal Signal Understanding: The ALVEN and CAA Projects
This paper describes the ALVEN and CAA projects. These projects share many basic concepts particularly with respect to the representation of knowledge and to the hypothesize and test nature of the control strategy. They both deal with temporally rich data interpretation tasks. However, they focus on very different aspects of interpretation. ALVEN processes images of a time-varying sequence in a real-time fashion (although not in real time), while CAA considers an entire signal, as if time were a second spatial dimension. ALVEN deals with the assessment of the performance of the human left ventricle from an X-ray image sequence, while CAA considers the causal relationships of the electrophysiologv of the human heart and the resulting electrocardiogram signal, and tries to detect and classify anomalies of rhythm. The contributions of these works lie in the elucidation of a representation and control structure for the knowledge-based interpretation of time-varying signals.
KeywordsRight Ventricle Causal Link Knowledge Organization Cardiac Conduction System Similarity Link
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