Computer Science and Artificial Intelligence Lab (CSAIL): Recent submissions
Now showing items 1281-1300 of 2625
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Site Controller: A System for Computer-Aided Civil Engineering and Construction
(1993-02-01)A revolution\0\0\0 in earthmoving, a $100 billion industry, can be achieved with three components: the GPS location system, sensors and computers in bulldozers, and SITE CONTROLLER, a central computer system that ...
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Geometry and Photometry in 3D Visual Recognition
(1992-11-01)The report addresses the problem of visual recognition under two sources of variability: geometric and photometric. The geometric deals with the relation between 3D objects and their views under orthographic and ...
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Statistical Object Recognition
(1993-01-01)Two formulations of model-based object recognition are described. MAP Model Matching evaluates joint hypotheses of match and pose, while Posterior Marginal Pose Estimation evaluates the pose only. Local search in pose ...
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Using Recurrent Networks for Dimensionality Reduction
(1992-09-01)This report explores how recurrent neural networks can be exploited for learning high-dimensional mappings. Since recurrent networks are as powerful as Turing machines, an interesting question is how recurrent networks ...
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Taming Chaotic Circuits
(1992-09-01)Control algorithms that exploit chaotic behavior can vastly improve the performance of many practical and useful systems. The program Perfect Moment is built around a collection of such techniques. It autonomously ...
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Automatic Analysis and Synthesis of Controllers for Dynamical Systems Based On P
(1992-09-01)I present a novel design methodology for the synthesis of automatic controllers, together with a computational environment---the Control Engineer's Workbench---integrating a suite of programs that automatically analyze ...
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Robot Motion Vision by Fixation
(1992-09-01)In many motion-vision scenarios, a camera (mounted on a moving vehicle) takes images of an environment to find the "motion'' and shape. We introduce a direct-method called fixation for solving this motion-vision problem ...
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A Vector Signal Processing Approach to Color
(1992-01-01)Surface (Lambertain) color is a useful visual cue for analyzing material composition of scenes. This thesis adopts a signal processing approach to color vision. It represents color images as fields of 3D vectors, from ...
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Why are There so Few Female Computer Scientists?
(1991-08-01)This report examines why women pursue careers in computer science and related fields far less frequently than men do. In 1990, only 13% of PhDs in computer science went to women, and only 7.8% of computer science ...
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Region-Based Feature Interpretation for Recognizing 3D Models in 2D Images
(1991-06-01)In model-based vision, there are a huge number of possible ways to match model features to image features. In addition to model shape constraints, there are important match-independent constraints that can efficiently ...
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Computational Structure of Human Language
(1990-10-01)The central thesis of this report is that human language is NP-complete. That is, the process of comprehending and producing utterances is bounded above by the class NP, and below by NP-hardness. This constructive ...
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Concurrent Aggregates (CA): An Object-Oriented Language for Fine-Grained Message-Passing Machines
(1990-07-01)Fine-grained parallel machines have the potential for very high speed computation. To program massively-concurrent MIMD machines, programmers need tools for managing complexity. These tools should not restrict program ...
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The PHD: A Planar, Harmonic Drive Robot for Joint Torque Control
(1990-05-01)This thesis details the development of a model of a seven degree of freedom manipulator for position control. Then, it goes on to discuss the design and construction of a the PHD, a robot built to serve two purposes: ...
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Pi: A Parallel Architecture Interface for Multi-Model Execution
(1990-05-01)This thesis defines Pi, a parallel architecture interface that separates model and machine issues, allowing them to be addressed independently. This provides greater flexibility for both the model and machine builder. ...
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Design and Control of a Closed-Loop Brushless Torque Actuator
(1990-05-01)This report explores the design and control issues associated with a brushless actuator capable of achieving extremely high torque accuracy. Models of several different motor - sensor configurations were studied to ...
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Analysis and Implementation of Robust Grasping Behaviors
(1990-05-01)This thesis addresses the problem of developing automatic grasping capabilities for robotic hands. Using a 2-jointed and a 4-jointed nmodel of the hand, we establish the geometric conditions necessary for achieving ...
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Passive and Active Grasping with a Prehensile Robot End-Effector
(1990-05-01)This report presents a design of a new type of robot end-effector with inherent mechanical grasping capabilities. Concentrating on designing an end-effector to grasp a simple class of objects, cylindrical, allowed a ...
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The Control of Human Arm Movement Models and Mechanical Constraints
(1990-05-01)A serial-link manipulator may form a mobile closed kinematic chain when interacting with the environment, if it is redundant with respect to the task degrees of freedom (DOFs) at the endpoint. If the mobile closed chain ...
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Dataflow Computation for the J-Machine
(1990-05-01)The dataflow model of computation exposes and exploits parallelism in programs without requiring programmer annotation; however, instruction- level dataflow is too fine-grained to be efficient on general-purpose ...
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Noise Reduction Using Low Weight and Constant Weight Coding Techniques
(1990-05-01)Signalling off-chip requires significant current. As a result, a chip's power-supply current changes drastically during certain output-bus transitions. These current fluctuations cause a voltage drop between the chip ...