Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Grid Maps"”.
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Vector Distance Transform Maps for Autonomous Mobile Robot Navigation
… compared to alternatives such as occupancy grid maps and other distance transform variants such as the unsigned distance transform and the signed distance transform. We propose an approach based on non-linear least squares optimization for robot localization on environments represented by …
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Localizing, modeling, and drifting an autonomous RACECAR
… two-dimensional ray casting in occupancy grid maps, called the Compressed Directional Distance Transform (CDDT). Here, I will discuss the theory and characteristics of the CDDT algorithm, which has been implemented in RangeLibc, my open-source software library.
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Locating Unknown Interference Sources with Time Difference of Arrival Estimates
… The localization results are displayed in grid maps that indicate the most likely signal source coordinates of the unknown signals. Our tools are open source and available for other researchers to locate interferers near their deployed network.</p>
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Spam Review Detection Using Self-Organizing Maps and Convolutional Neural Networks
… Unsupervised learning via self-organizing maps (SOM) in conjunction with a convolutional neural networks (CNN) are employed to perform classification of the reviews. We transform the reviews into images by arranging semantically-similar words around a pixel of the image or equivalently a …
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Information Freshness for Monitoring and Control over Wireless Networks
… in the collection of time-varying occupancy grid maps using multiple robots via the Whittle Index framework. Further, to demonstrate the benefits of our theoretical contributions, we built a real system (WiSwarm) for mobility tracking using a swarm of UAVs, communicating with a central …
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Learning-Based Quality of Service Prediction in Cellular Vehicle Communication
… models including both Location Smoothing (LS) grid maps and Learning Based (LB) regression ones. Moreover, the possibility of using the location independence of a model as well as suitability for automated driving is evaluated.
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Stochastic mapping for chemical plume source localization with application to autonomous hydrothermal vent discovery
… stochastic mapping is an adaptation of occupancy grid mapping where the binary state of map nodes is redefined to denote either the presence (occupancy) or absence of an active plume source. A key characteristic of the chemical plume source localization problem is that only a few sources are …
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Fast and optimal pathfinding
… well suited to speeding up pathfinding search on grid-maps of the type widely employed in computer games and robotics. Moreover, our work is largely orthogonal with a wide range of efficiency-improving techniques that have been previously described in the academic literature. We investigate a …
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Fast and optimal pathfinding
… well suited to speeding up pathfinding search on grid-maps of the type widely employed in computer games and robotics. Moreover, our work is largely orthogonal with a wide range of efficiency-improving techniques that have been previously described in the academic literature. We investigate a …
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QUANTIFYING THE DISTRIBUTION OF FOREST FUNCTIONAL TYPES AND FOREST LEAF AREA INDEX IN THE ALPS
… sensing is an attractive source of thematic maps, such as those depicting land cover. Thematic mapping from remote sensing data is typically based on image classification. The image classification procedure synthesizes satellite data with field data and other ancillary data derived from a …
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Robust real-time locolization and mapping in single and multi-robot systems
… our approach neither represents hypotheses about maps explicitly, nor assumes any prior distribution of robot poses or maps. Instead, the approach is based on localizing a robot in its own local sub-maps, which can be computed by retrieving the previously stored perception data the robot has …