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Observability-Aware Trajectory Optimization: Theory, Viability, and State of the Art
[article]
2021
arXiv
pre-print
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For evaluation, we examine the representative task of sensor-to-sensor extrinsic self-calibration using a realistic physics simulator. ...
In this paper, we compare two state-of-the-art methods for observability-aware trajectory optimization and seek to add important theoretical clarifications and valuable discussion about their overall effectiveness ...
We use the notation R(q ab ) for the operator that converts the unit quaternion q ab to the respective SO(3) rotation matrix. ...
arXiv:2109.09007v1
fatcat:fr2tq3mltfbvbkczahfxk3f4nm
Question Calibration and Multi-Hop Modeling for Temporal Question Answering
[article]
2024
arXiv
pre-print
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Many models that leverage knowledge graphs (KGs) have recently demonstrated remarkable success in question answering (QA) tasks. ...
To alleviate this problem, we propose a novel Question Calibration and Multi-Hop Modeling (QC-MHM) approach. ...
Concretely, for a given question, we first select the relevant knowledge (i.e., Subject-Predicate-Object (abbr. SPO)) of the entity in the question from TKGs. ...
arXiv:2402.13188v1
fatcat:4s3evmjjsvh23dpq2vygk4tv2m
Simulation-based Optimization and Sensibility Analysis of MPI Applications: Variability Matters
[article]
2022
arXiv
pre-print
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Havinginexpensive but faithful predictions of expected performance could bea great help for researchers and system administrators. ...
Last, we show (3) how our "surrogate" allowsstudying several subtle HPL parameter optimization problems whileaccounting for uncertainty on the platform. ...
Last, we warmly thank the SimGrid developers for their help in integrating our contributions and for their early feedback on this work before submission. ...
arXiv:2102.07674v2
fatcat:5loj3bmom5djfpm7uib73n552i
2021 Index IEEE Transactions on Knowledge and Data Engineering Vol. 33
2022
IEEE Transactions on Knowledge and Data Engineering
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The Author Index contains the primary entry for each item, listed under the first author's name. ...
., +, TKDE Sept. 2021 3199-3211 Medical computing EKT: Exercise-Aware Knowledge Tracing for Student Performance Prediction. ...
Zhao, K., +, TKDE June 2021 2723-2736 Educational computing EKT: Exercise-Aware Knowledge Tracing for Student Performance Prediction. Liu, Q., +, TKDE Jan. 2021 100-115 mendation. ...
doi:10.1109/tkde.2021.3128365
fatcat:4m5kefreyrbhpb3lhzvgqzm3qu
Understanding radio polarimetry
2000
Astronomy and Astrophysics Supplement Series
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Like scalar selfcal, matrix self-alignment is shown to suppress spatial scattering of brightness in the image, which is a condition for attaining high dynamic range. ...
It exploits the analogy between scalar and matrix algebras to reformulate the self-calibration method in terms of 2×2 Jones and coherency matrices. ...
The effect is not directly relevant here, but it should not be forgotten. ...
doi:10.1051/aas:2000337
fatcat:twqtzpmxzngwnbcm4rw3njx2vq
Contrastive Learning for Knowledge Tracing
2022
Proceedings of the ACM Web Conference 2022
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This paper introduces a contrastive learning framework for knowledge tracing that reveals semantically similar or dissimilar examples of a learning history and stimulates to learn their relationships. ...
Knowledge tracing is the task of understanding student's knowledge acquisition processes by estimating whether to solve the next question correctly or not. ...
ACKNOWLEDGMENTS The authors would like to thank the anonymous reviewers for their valuable comments and helpful suggestions. ...
doi:10.1145/3485447.3512105
fatcat:aoagt5sfsnbwpcbthigzztu6ba
Robust Odometry and Mapping for Multi-LiDAR Systems with Online Extrinsic Calibration
[article]
2021
arXiv
pre-print
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Combining multiple LiDARs enables a robot to maximize its perceptual awareness of environments and obtain sufficient measurements, which is promising for simultaneous localization and mapping (SLAM). ...
This paper proposes a system to achieve robust and simultaneous extrinsic calibration, odometry, and mapping for multiple LiDARs. ...
They would also like to thank the editors and anonymous reviewers of IEEE TRO for their suggestions, which led us to improve this article. ...
arXiv:2010.14294v2
fatcat:xeaus6kdmvggpdta6dvfodl4xu
Capabilities of femtosecond laser ablation ICP-MS for the major, minor, and trace element analysis of high alloyed steels and super alloys
2011
Analytical and Bioanalytical Chemistry
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The determined concentrations for major and minor elements indicate that the total matrix internal standardization (100 wt.%) is applicable, which requires no knowledge about the steel samples prior to ...
Calibration with matrix-matched and non-matrixmatched standards provided similar agreement within the uncertainty of the certified values. ...
Several publications describe the use of Q-switched Nd:YAG lasers for the analysis of minor and trace elements in metallurgical samples [14, 15] . ...
doi:10.1007/s00216-010-4605-8
pmid:21221547
fatcat:wifaxrwup5difnyvpk7aei5qgq
Observability-Aware Self-Calibration of Visual and Inertial Sensors for Ego-Motion Estimation
2019
IEEE Sensors Journal
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parts from a dataset for calibration purposes. ...
External effects such as shocks and temperature variations affect the calibration of visual-inertial sensor systems and thus they cannot fully rely on factory calibrations. ...
ACKNOWLEDGEMENTS We would like to thank Konstantine Tsotsos, Michael Burri and Igor Gilitschenski for the valuable discussions and inputs. This work was partially funded by Google's Project Tango. ...
doi:10.1109/jsen.2019.2893809
fatcat:6dfr237fubgoffzbhymuyfwnqm
Uncertainty-Aware DNN for Multi-Modal Camera Localization
[article]
2023
arXiv
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We propose to exploit CMRNet, a DNN approach for multi-modal image to LiDAR map registration, by modifying its internal configuration to allow for extensive experimental activity on the KITTI dataset. ...
., y = x) and the observed calibration, for each confidence interval. Furthermore, in Fig. 3 we show the calibration curves of the most relevant pose parameters. ...
For both translation and rotation, we compute the trace of the covariance matrix and compare them to a threshold that allows us to discard predictions with large uncertainty. ...
arXiv:2211.01234v2
fatcat:egsbashenbedremolh6rwxdrr4
Performance study of multiuser interference mitigation schemes for hybrid broadband multibeam satellite architectures
2012
EURASIP Journal on Wireless Communications and Networking
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those cases for which the number of radiating elements is higher than the number of user beams. ...
As the demand for higher throughput satellites increases, multibeam architectures with smaller beam spots are becoming common place. ...
We are also in debt with Riccardo de Gaudenzi for his valuable comments. Research supported by ESA contract 23089/10/NL/CLP "SatNEx Network of Experts", the European Regional Development ...
doi:10.1186/1687-1499-2012-132
fatcat:x2k3qocanraz5ji7iuswtp3ciy
Interplay between Habit Plane and Orientation Relationship in an Electron Backscatter Diffraction Analysis: Using the Example of η′-Al8Fe3 in η-Al5Fe2
2022
Crystals
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These habit planes have been determined based on their traces measured for differently oriented η containing the η′ plates, applying different methods. ...
In the present work, the microstructural characteristics of the plate-shaped η′-Al8Fe3 phase regions in a η‴/η-phase matrix were investigated, determining the habit planes from two-dimensional electron ...
Hence, a profound knowledge of the microstructures developing in Al5Fe2 upon ordering is strived for. ...
doi:10.3390/cryst12060813
fatcat:pbbmvkj5jjgoblv23b3mkr2asm
Nanocartography: Planning for success in analytical electron microscopy
[article]
2022
arXiv
pre-print
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PNNL is a multiprogram national laboratory operated by Battelle for the U.S. DOE under contract DEAC05-76RL01830. ...
Larry Thomas, Steven Spurgeon, and Libor Kovarik for their fruitful discussions on electron microscopy and crystallography. ...
Equation 62 𝑅 = 𝑝 𝑞 𝑡 𝑝 𝑞 𝑡 𝑝 𝑞 𝑡 The previous rotation matrix was derived for Crystal A (Eqn. 62), but the exact procedure applies to Crystal B without any modifications beyond the subscript ...
arXiv:2205.03956v1
fatcat:ncp5jjlzlnepjfq3dars4ki62q
Which Features Do My Users (Not) Use?
2014
2014 IEEE International Conference on Software Maintenance and Evolution
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It indicates the relevance of the problem and the capability of the presented approach to detect unused features. ...
The authors assume responsibility for the content. ...
ACKNOWLEDGMENTS The authors thank Christoph Frenzel and Veronika Bauer for their helpful comments on this work, and Karl-Heinz Prommer and Rudolf Vaas for their efforts interpreting the data. ...
doi:10.1109/icsme.2014.71
dblp:conf/icsm/EderFHJ14
fatcat:7kjtz4mstfcoxdzsvsqb73rgdy
Multi-Label Zero-Shot Learning with Transfer-Aware Label Embedding Projection
[article]
2018
arXiv
pre-print
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Zero-shot learning transfers knowledge from seen classes to novel unseen classes to reduce human labor of labelling data for building new classifiers. ...
Auxiliary information can be conveniently incorporated to guide the label embedding projection to further improve label relation structures for zero-shot knowledge transfer. ...
For any matrix, e.g., X, we use X i to denote its i-th row vector. We use · F to denote the Frobenius norm of a matrix and use tr(·) to denote the trace of a matrix. ...
arXiv:1808.02474v1
fatcat:dov2w7ofbvdg3kdfiprkb5sm3i
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