Modified line integral methods for conservative problems with multiple invariants [PDF]
AIP Conference Proceedings, 2015 In this paper we define a class of modified line integral methods, which are a suitable modification of energy conserving methods in the HBVMs class, able to cope with conservative problems possessing multiple invariants. The analysis of the methods is sketched, along with some numerical tests.
Luigi Brugnano, Felice Iavernaro
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Acta et Commentationes: Ştiinţe Exacte şi ale NaturiiIn this paper the quartic differential systems with a center-focus critical point and non-degenerate infinity are examined. We show that in this family the maximal multiplicity of an affine invariant straight line is six. Modulo the affine transformation
Olga Vacaraș
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Quadratic systems with invariant straight lines of total multiplicity two having Darboux invariants [PDF]
Communications in Contemporary Mathematics, 2021 In this paper, we present the global phase portraits in the Poincaré disc of the planar quadratic polynomial systems which admit invariant straight lines with total multiplicity two and Darboux invariants.
Jaume Llibre, Regilene D. S. Oliveira
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SIFT-GVF-based lung edge correction method for correcting the lung region in CT images.
PLoS ONE, 2023 Juxtapleural nodules were excluded from the segmented lung region in the Hounsfield unit threshold-based segmentation method. To re-include those regions in the lung region, a new approach was presented using scale-invariant feature transform and ...
Xin Li +4 more
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Centers of cubic differential systems with the line at infinity of maximal multiplicity
Acta et Commentationes: Ştiinţe Exacte şi ale Naturii, 2023 We classify all cubic differential systems with a center-focus critical point and the line at infinity of maximal multiplicity. It is proved that the critical point is of the center type if and only if the divergence of the vector field associated to ...
Alexandru Șubă
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Prefiltered Striation-Based Beamforming for Range Estimation of Multiple Sources
Journal of Marine Science and Engineering, 2023 The element–frequency acoustic intensity of a horizontal line array with a sufficient aperture exhibits interference striation patterns, which can be used for source range estimation without prior environmental information.
Pingzheng Li +6 more
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Line Segment Matching Fusing Local Gradient Order and Non-Local Structure Information
Applied Sciences, 2021 Line segment matching is essential for industrial applications such as scene reconstruction, pattern recognition, and VSLAM. To achieve good performance under the scene with illumination changes, we propose a line segment matching method fusing local ...
Weibo Cai +6 more
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Multimodal Representation Learning and Set Attention for LWIR In-Scene Atmospheric Compensation
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 A multimodal generative modeling approach combined with permutation-invariant set attention is investigated in this article to support long-wave infrared (LWIR) in-scene atmospheric compensation.
Nicholas Westing +5 more
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INTEGRATION OF TERRESTRIAL LASER SCANNING POINTS AND 2D FLOOR PLANS BASED ON MAXIMUM SEQUENTIAL SIMILARITY [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012 This paper presents a Maximum Sequential Similarity Reasoning (MSSR) algorithm based method for co-registration of 3D TLS data and 2D floor plans. The co-registration consists of two tasks: estimating a transformation between the two datasets and finding
L. Wang, G. Sohn
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Planar quadratic vector fields with invariant lines of total multiplicity at least five [PDF]
Qualitative Theory of Dynamical Systems, 2004 50 pages, 4 Postscript figures ...
Schlomiuk, D.I., Vulpe, N.I.
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