There is currently an enormous interest in the concept of software architecture, largely induced by the concept of architectural patterns first introduced by the architect Christopher Alexander (Alexander, 1979;Alexan...
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A contest on raster to vector conversion was organized at the GREC’97 workshop in Nancy, France. This report describes the methodology used in the contest and presents the results. Various ways of analyzing the perfo...
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This paper presents a benchmark for evaluating the Raster to vector conversion systems. The benchmark is designed for evaluating the performance of graphics recognition systems on images that contain straight lines (s...
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High Performance Fortran (HPF) is an effective language for implementing regular data parallel applications on distributed memory architectures, but it is not well suited to irregular, block-structured applications su...
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Lee's algorithm (1961) for routing always finds a minimum length path, if one exists. We discuss an enhancement to an earlier maze-routing algorithm to reduce the number of zig-zag line segments in the routing pat...
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Lee's algorithm (1961) for routing always finds a minimum length path, if one exists. We discuss an enhancement to an earlier maze-routing algorithm to reduce the number of zig-zag line segments in the routing path. This method would find a path between two points, if one exists, on a rectangular grid of cells. A line search method using efficient data structures has been applied that would reduce the number of line segments in the path. Blocking cells are introduced as obstacles in finding the path. All line segments are considered as horizontal and vertical only. An implementation of the method and its experimental results are reported.
This paper defines a computational protocol for evaluating the performance of raster to vector conversion systems. The graphical entities handled by this protocol are continuous and dashed lines, arcs, and circles, an...
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This paper presents a new fine-grained temporal Petri net model for distributed multimedia synchronization that can handle fuzzy temporal requirements and facilitate to verify the possibility of satisfying QoS require...
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This paper presents a new fine-grained temporal Petri net model for distributed multimedia synchronization that can handle fuzzy temporal requirements and facilitate to verify the possibility of satisfying QoS requirements. We present a procedure for constructing the fine-grained model, starting from a set of relative temporal relations among multimedia objects. And we give an approach to infer unknown durations. Finally, we discuss how to model intra-stream and inter-stream synchronizations so as to guarantee the QoS.
Whereas it is generally acknowledged that code tangling reduces the quality of software and that aspect-oriented programming (AOP) is a means of addressing this problem, there is — as yet — no clear definition or ch...
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Learning the influence of additive noise and channel distortions from training data is an effective approach for robust speech recognition. Most of the previous methods are based on maximum likelihood estimation crite...
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ISBN:
(纸本)0780344286
Learning the influence of additive noise and channel distortions from training data is an effective approach for robust speech recognition. Most of the previous methods are based on maximum likelihood estimation criterion. We propose a new method of discriminative learning environmental parameters, which is based on the minimum classification error (MCE) criterion. By using a simple classifier defined by ourselves and the generalized probabilistic descent (GPD) algorithm, we iteratively learn environmental parameters. After getting the parameters, we estimate the clean speech features from the observed speech features and then use the estimation of the clean speech features to train or test the back-end HMM classifier. The best error rate reduction of 32.1% is obtained, tested on a Korean 18 isolated confusion words task, relative to the conventional HMM system.
Functional Hazard Assessment (FHA) is being increasingly recommended (e.g. by the Aerospace Recommended Practice-ARP 4754 [SAE94]) as a means of performing hazard identification. However, many of the available example...
Functional Hazard Assessment (FHA) is being increasingly recommended (e.g. by the Aerospace Recommended Practice-ARP 4754 [SAE94]) as a means of performing hazard identification. However, many of the available example applications of this approach (including that given in ARP 4761 [SAE95]) are illustrated either for aircraft-level functions or sub-system functions with obvious and visible functional effects. Our experience is that it can be difficult to apply FHA for lower level aircraft systems (specifically at the level of the engine controller) where, due to the level of complexity and integration with other systems, the overall effects of functional failure are far from obvious. In this paper, we describe the problems we have encountered when applying FHA and the (partial) solutions we have proposed in order to overcome these problems.
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