Model-based diagnosis of industrial applications (i.e., complex systems) has to face a lot of problems inherent in complexity. Most applications involve thousands of components and are dynamic. The approach outlined i...
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Model-based diagnosis of industrial applications (i.e., complex systems) has to face a lot of problems inherent in complexity. Most applications involve thousands of components and are dynamic. The approach outlined in this paper is based on semantic nets representing causal and temporal knowledge to be used for fault diagnosis. A view and a hierarchy-concept serve for structured modelling and focused diagnosis. An efficient diagnostic inference mechanism is based on a pre-computation phase, where diagnostic knowledge is restructured to grant efficient access operations during a diagnostic session phase.
Concurrent Engineering is the activity that results in the design of a product taking into consideration downstream concerns, such as manufacturability, testability and maintainability of the designed product Concurre...
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Provides a geometric representation of friction for a rigid planar part with two translational and one rotational degrees of freedom. The construction of a generalized friction cone is accomplished by imbedding into t...
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Provides a geometric representation of friction for a rigid planar part with two translational and one rotational degrees of freedom. The construction of a generalized friction cone is accomplished by imbedding into the part's configuration space the constraints that define the classical friction cone in real space. The resulting representation provides a simple computational method for determining the possible motions of a part subjected to an applied force and torque. The representation has been used both for simulating part motions and for planning assembly operations. Generalizations to the six-dimensional configuration space of a three-dimensional part are possible.< >
Two aspects of the design of space robots is covered implemented by neural networks and by hybrid approach with artificial intelligence. One is a neurocontroller for a real-time autonomous system. An optical control s...
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The Carnegie Mellon University Planetary Rover project is developing the Ambler, a six-legged robot designed for planetary exploration. The authors have developed reliable and efficient control, perception and plannin...
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The Carnegie Mellon University Planetary Rover project is developing the Ambler, a six-legged robot designed for planetary exploration. The authors have developed reliable and efficient control, perception and planning algorithms suitable for navigating rugged terrain. The components have been integrated into a system that autonomously walks the Ambler along routes and over obstacles.< >
The Reading Assistant is a multimedia interactive system designed to help people learn a foreign language. It does so by promoting learning in context: language material is always presented as part of originally unedi...
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The Reading Assistant is a multimedia interactive system designed to help people learn a foreign language. It does so by promoting learning in context: language material is always presented as part of originally unedited foreign-language text. Students learn a language by reading text with the aid of tools such as online dictionaries, grammars, and translation aids. The recorded pronunciation of individual words And sentences is also available and can be played back as often as needed. The Reading Assistant allows all aspects of the interaction to be controlled by the student, and minimizes information overload through the use of statistical grammars. While the system is designed to help English speakers loam a second language, the results of an experiment show that it could easily be extended to teach English as a second language to non-native English speakers.
Concurrent engineering is the activity that results in the design of a product taking into consideration downstream concerns, such as manufacturability, testability and maintainability of the designed product. Concurr...
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Concurrent engineering is the activity that results in the design of a product taking into consideration downstream concerns, such as manufacturability, testability and maintainability of the designed product. Concurrent engineering is an example of group decision-making and negotiation that commonly occurs in organizations. It involves many agents (e.g. design, manufacturing, materials, marketing), each of which has its own feasibility and performance criteria. Conflicting goals and viewpoints that arise during the process are resolved through negotiation. The authors introduce the concept of intelligent information infrastructure to support the integration of distributed decision-making and negotiation among the heterogeneous functions of a manufacturing enterprise.< >
The goal of the planetary rover project is to prototype an autonomous mobile robot for planetary exploration. The authors have constructed a six-legged walking robot, called the Ambler, that features orthogonal legs, ...
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The goal of the planetary rover project is to prototype an autonomous mobile robot for planetary exploration. The authors have constructed a six-legged walking robot, called the Ambler, that features orthogonal legs, an overlapping gait, and a scanning laser rangefinder to model terrain. To enable the Ambler to walk over rugged terrain, they have combined perception, planning, and real-time control into a comprehensive robotic system.< >
A hierarchical stereo system is described that uses structural descriptions up to the surface level. Surface descriptions are computed from monocular images, by using a perceptual grouping technique. Occlusion can be ...
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A hierarchical stereo system is described that uses structural descriptions up to the surface level. Surface descriptions are computed from monocular images, by using a perceptual grouping technique. Occlusion can be a major problem in stereo analysis and is often not treated explicitly. An analysis is presented of occlusion effects in stereo, and it is shown how structural descriptions can be used to deal with them. Experimental results are given for scenes with curved objects and significant occlusions.< >
An early-processing algorithm to extract motion information from closely sampled image sequences is presented. This method outputs dense displacement field, based on the extraction of strips in slices taken from the i...
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An early-processing algorithm to extract motion information from closely sampled image sequences is presented. This method outputs dense displacement field, based on the extraction of strips in slices taken from the image volume along the temporal dimension. The extracted strips provide estimates of the velocity component along the slice orientation. Because of the high sampling rate, the motion is assumed to be piecewisely translational. A voting scheme to estimate the position of FOE while extracting strips is proposed. The true velocity can then be calculated. Results on several real image sequences and a promising speedup from the parallel implementation on the Connection Machine are presented.< >
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