W. Qiu

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— By decentralized diagnosis we mean diagnosis using multiple diagnosers, each possessing it's own set of sensors, without involving any communication among diagnosers or to any coordinators. We formalize the notion of decentralized diagnosis by introducing the notion of codiagnosability that requires that a failure be detected by one of the diagnosers(More)
CL_MATCONT is a MATLAB package for the study of dynamical systems and their bifurcations. It uses a minimally augmented system for continuation of the Hopf curve. The Continuation of Invariant Subspaces (CIS) algorithm produces a smooth orthonormal basis for an invariant subspace R(s) of a parameter-dependent matrix A(s). We extend a minimally augmented(More)
Cone beam computed tomography (CBCT) provides a volumetric image reconstruction from tomographic projection data. Image quality is the main concern for reconstruction in comparison to conventional CT. The reconstruction algorithm used is clearly important and should be carefully designed, developed and investigated before it can be applied clinically. The(More)
Cone beam computed tomography (CBCT) enables a volumetric image reconstruction from a set of 2D projection data. It plays an important role in image guided radiation therapy (IGRT). However, it is desirable to lower the patient radiation dose while maintaining good quality tomographic reconstructions. Hence, methods are needed even when the data is(More)
Cone Beam Computed Tomography (CBCT) is widely used in radiation therapy for verifying treatment areas, since it provides three-dimensional image reconstruction of those tumour regions under inspection. However, organ motion is problematic during the scanning process, it causes motion artefacts on the CBCT image and can lead to mispositioning for the(More)
Cone beam computed tomography (CBCT) enables volumetric image reconstruction from 2D projection data and plays an important role in image guided radiation therapy (IGRT). Filtered back projection is still the most frequently used algorithm in applications. The algorithm discretizes the scanning process (forward projection) into a system of linear equations,(More)
In this paper, we describe DATPLEX, an extensible design-aid tool for physical database design. DAT-PLEX adopts a layered approach where each layer improves over its input design; and is \extensible" in the sense that an additional layer can be \plugged" into the tool, or an existing layer can be removed from the tool. The current implementation comprises(More)
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