This paper presents a task-driven approach to perspective-taking for qualitative reasoning . Central to our approach is the notion that model formulation and selection is an integral part of reasoning about complex physical systems . Using the domain of electronic circuits as an example, we investigate three perspective-taking dimensions in qualitative reasoning : topological configuration, str...

In this paper we consider the problem of classification of qualitative data. We present an approach to overcome several difficulties which show SAHN (sequential, agglomerative, hierarchic, nonoverlapping) clustering methods to classify qualitative data when using centroids to compute similarities between pairs of classes. The approach is based on a recently proposed class of qualitative weighte...

Superconductor fault current limiter (SFCL) is an effective device to suppress high fault currents. This paper presents a comparative study of resistive and inductive fault current limiters from transient stability point of view.  Appropriate location and type of the limiters in a HV substation is selected by a qualitative approach based on the equal area criterion. Study system is simulated by...

We describe a methodology for the analysis of radiographic images which is based on two major techniques: (1) qualitative geometric abstraction and (2) ontological analysis of anatomical structures. The first technique is a bottom-up approach to extract qualitative spatial relations from medical radiographic images and the second technique is a top-down approach to determine which qualitative r...

In this paper, we present an approach to qualitative description of images containing non-overlapping 2D objects. This approach consists of extracting the properties of the main points of the objects in an image and applying qualitative models to them. Qualitative models of shape and size describe visual features of the objects in the image, while qualitative models of orientation and distance ...