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Combining Associational and Causal Reasoning to Solve Interpretation and Planning Problems
(1988-08-01)
This report describes a paradigm for combining associational and causal reasoning to achieve efficient and robust problem-solving behavior. The Generate, Test and Debug (GTD) paradigm generates initial hypotheses using ...
Theories of Comparative Analysis
(1988-05-01)
Comparative analysis is the problem of predicting how a system will react to perturbations in its parameters, and why. For example, comparative analysis could be asked to explain why the period of an oscillating ...
Three-Dimensional Recognition of Solid Objects from a Two-Dimensional Image
(1988-10-01)
This thesis addresses the problem of recognizing solid objects in the three-dimensional world, using two-dimensional shape information extracted from a single image. Objects can be partly occluded and can occur in ...
Heuristics for Job-Shop Scheduling
(1988-01-01)
Two methods of obtaining approximate solutions to the classic General Job-shop Scheduling Program are investigated. The first method is iterative. A sampling of the solution space is used to decide which of a collection ...
Computation and Pre-Parametric Design
(1988-09-01)
My work is broadly concerned with the question "How can designs bessynthesized computationally?" The project deals primarily with mechanical devices and focuses on pre-parametric design: design at the level of detail ...
Computational Structure of the N-body Problem
(1988-04-01)
This work considers the organization and performance of computations on parallel computers of tree algorithms for the N-body problem where the number of particles is on the order of a million. The N-body problem is ...
Exploiting Lexical Regularities in Designing Natural Language Systems
(1988-04-01)
This paper presents the lexical component of the START Question Answering system developed at the MIT Artificial Intelligence Laboratory. START is able to interpret correctly a wide range of semantic relationships associated ...
On the Sensitivity of the Hough Transform for Object Recognition
(1988-05-01)
A common method for finding an object's pose is the generalized Hough transform, which accumulates evidence for possible coordinate transformations in a parameter space and takes large clusters of similar transformations ...
Modeling Robot Flexibility for Endpoint Force Control
(1988-05-01)
Dynamic models have been developed in an attempt to match the response of a robot arm. The experimental data show rigid-body and five resonant modes. The frequency response and pole-zero arrays for various models of ...
Numerical Evidence that the Motion of Pluto is Chaotic
(1988-04-01)
The Digital Orrery has been used to perform an integration of the motion of the outer planets for 845 million years. This integration indicates that the long-term motion of the planet Pluto is chaotic. Nearby trajectories ...