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- Cascan, Edgar Tamayo, et al.
(författare)
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Multi-Objective Calibration of Microscopic Traffic Simulation for Highway Traffic Safety
- 2019
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Ingår i: Proceedings of the 2019 IEEE Intelligent Transportation Systems Conference (ITSC). ; , s. 4548-4555
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Konferensbidrag (refereegranskat)abstract
- Microscopic traffic simulation has become an important tool to investigate traffic efficiency and road safety. In order to produce meaningful results, driver behaviour models need to be carefully calibrated to represent real world conditions. If this type of simulations are to be used to evaluate safety features of traffic, on top of macroscopic relationships such as the speed-density diagram, they should also adequately represent the average risk of accidents occurring on the road. In this paper, we present a two-stage computationally feasible multi-objective calibration process. The first stage performs a parameter sensitivity analysis to select only parameters with considerable effect on the respective objective functions. The second stage employs a multi-objective genetic algorithm utilizing only few influential parameters that produces a front of Pareto optimal solutions with respect to the conflicting objective functions. Compared to traditional methods which focus on only one objective while sacrificing the accuracy of the other, our method achieves a high degree of realism for both traffic flow and average risk.
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| 3. |
- Eckhoff, H., et al.
(författare)
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The PROIEL treebank family: a standard for early attestations of Indo-European languages
- 2018
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Ingår i: Language Resources and Evaluation. - : Springer Science and Business Media LLC. - 1574-020X .- 1574-0218. ; 52:1, s. 29-65
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Tidskriftsartikel (refereegranskat)abstract
- This article describes a family of dependency treebanks of early attestations of Indo-European languages originating in the parallel treebank built by the members of the project pragmatic resources in old Indo-European languages. The treebanks all share a set of open-source software tools, including a web annotation interface, and a set of annotation schemes and guidelines developed especially for the project languages. The treebanks use an enriched dependency grammar scheme complemented by detailed morphological tags, which have proved sufficient to give detailed descriptions of these richly inflected languages, and which have been easy to adapt to new languages. We describe the tools and annotation schemes and discuss some challenges posed by the various languages that have been annotated. We also discuss problems with tokenisation, sentence division and lemmatisation, commonly encountered in ancient and mediaeval texts, and challenges associated with low levels of standardisation and ongoing morphological and syntactic change.
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