| 1. |
- Kruschwitz, Jens, et al.
(författare)
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Modelling, simulation and parameter identification of active pollution reduction with photocatalytic asphalt
- 2019
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Ingår i: Acta Polytechnica. - Prague : Czech Technical University in Prague. - 1210-2709 .- 1805-2363. ; 59:1, s. 51-58
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Tidskriftsartikel (refereegranskat)abstract
- We develop and implement a numerical model to simulate the effect of photocatalytic asphalt on reducing the concentration of nitrogen monoxide (NO) due to the presence of heavy traffic in an urban environment. The contributions in this paper are threefold: we model and simulate the spread and breakdown of pollution in an urban environment, we provide a parameter estimation process that can be used to find missing parameters, and finally, we train and compare this simulation with different data sets. We analyse the results and provide an outlook on further research.
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| 2. |
- Mansouri, Masoumeh, 1985-, et al.
(författare)
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Hybrid Reasoning for Multi-robot Drill Planning in Open-pit Mines
- 2016
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Ingår i: Acta Polytechnica. - Prague, Czech Republic : Czech Technical University in Prague. - 1210-2709 .- 1805-2363. ; 56:1, s. 47-56
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Tidskriftsartikel (refereegranskat)abstract
- Fleet automation often involves solving several strongly correlated sub-problems, including task allocation, motion planning, and coordination. Solutions need to account for very specific, domaindependent constraints. In addition, several aspects of the overall fleet management problem become known only online. We propose a method for solving the fleet-management problem grounded on a heuristically-guided search in the space of mutually feasible solutions to sub-problems. We focus on a mining application which requires online contingency handling and accommodating many domainspecific constraints. As contingencies occur, efficient reasoning is performed to adjust the plan online for the entire fleet.
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| 3. |
- Wen, Wei, et al.
(författare)
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Back to basics : Towards novel computation and arrangement of spatial sensory in images
- 2016
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Ingår i: Acta Polytechnica. - : CZECH TECHNICAL UNIV PRAGUE. - 1210-2709. ; 56:5, s. 409-416
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Tidskriftsartikel (refereegranskat)abstract
- The current camera has made a huge progress in the sensor resolution and the low-luminance performance. However, we are still far from having an optimal camera as powerful as our eye is. The study of the evolution process of our visual system indicates attention to two major issues: the form and the density of the sensor. High contrast and optimal sampling properties of our visual spatial arrangement are related directly to the densely hexagonal form. In this paper, we propose a novel software-based method to create images on a compact dense hexagonal grid, derived from a simulated square sensor array by a virtual increase of the fill factor and a half a pixel shifting. After that, the orbit functions are proposed for a hexagonal image processing. The results show it is possible to achieve image processing operations in the orbit domain and the generated hexagonal images are superior, in detection of curvature edges, to the square images. We believe that the orbit domain image processing has a great potential to be the standard processing for hexagonal images.
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