PUMA publications for /tag/pointhttps://puma.ub.uni-stuttgart.de/tag/pointPUMA RSS feed for /tag/point2024-03-19T04:39:58+01:00Patch-based M3C2: Towards lower-uncertainty and higher-resolution deformation analysis of 3D point cloudshttps://puma.ub.uni-stuttgart.de/bibtex/24a55a92bfdcaa7bb516957eeef4d2672/larsplatelarsplate2023-11-13T09:27:38+01:002023 3D cloud iigs point <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Yihui Yang" itemprop="url" href="/person/1feae84561b6e1ef1837ff6c8f45cbb5c/author/0"><span itemprop="name">Y. Yang</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Volker Schwieger" itemprop="url" href="/person/1feae84561b6e1ef1837ff6c8f45cbb5c/author/1"><span itemprop="name">V. Schwieger</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">International Journal of Applied Earth Observation and Geoinformation</span>, </em> </span>(<em><span>2023<meta content="2023" itemprop="datePublished"/></span></em>)</span>Mon Nov 13 09:27:38 CET 2023International Journal of Applied Earth Observation and Geoinformation103535Patch-based M3C2: Towards lower-uncertainty and higher-resolution deformation analysis of 3D point clouds12520232023 3D cloud iigs point Multi-temporal acquisitions of 3D point clouds for geomonitoring tasks allow the quantification and analysis of geometric changes of monitored objects by advanced processing algorithms, further revealing the underlying deformation mechanism. Among numerous approaches proposed in the geoscientific domain for point cloud-based deformation analysis, multiscale model-to-model cloud comparison (M3C2) has been widely applied to quantify the distances between two point clouds with high surface roughness. Deformations under complex topographies, however, are still challenging to be accurately quantified and analyzed by a statistical significance test when using standard M3C2, for (1) average positions in the cylindrical neighborhoods may deviate from the actual surface and (2) empirical uncertainties represented by local roughness are overestimated in highly variable areas. Besides, the spatial resolution of derived deformations is limited by original point densities and algorithm limitations. In this article, we propose an alternative called patch-based M3C2, which inherits the basic framework of standard M3C2 for its simplicity. This novel data-driven approach does not need surface meshing and the identification of semantic or instance correspondences in point clouds. Lower uncertainty is achieved by generating locally planar patches and projecting measurements on associated patch planes, allowing better detection of small deformations in complex 3D topographies. Besides, patch-based M3C2 could assign a deformation value to any position within the overlapping areas, enabling a higher spatial resolution of deformation analysis. Our approach is demonstrated and evaluated on three datasets. The experimental results indicate that patch-based M3C2 exhibits higher accuracy on distance calculations between two surfaces.Point load Actuated Adaptive Gridshells: Methods for initial design and modelinghttps://puma.ub.uni-stuttgart.de/bibtex/2946c9bbd52a2286eee41919fe871dd04/itkeitke2020-05-22T14:22:38+02:00initial modeling bonavia körner method vecvagare knippers shell modelling gridshell point 2019 design grid itke from:petraheim load wood architecture actuated <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Elaine Bonavia" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/0"><span itemprop="name">E. Bonavia</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Vecvagare" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/1"><span itemprop="name">S. Vecvagare</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Axel Körner" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/2"><span itemprop="name">A. Körner</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Dylan Wood" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/3"><span itemprop="name">D. Wood</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Knippers" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/4"><span itemprop="name">J. Knippers</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Proceedings of IASS Annual Symposium 2019 – Structural Membranes 2019 Form and Force</span>, </em></span><em>Barcelona, Spain, </em>(<em><span>October 2019<meta content="October 2019" itemprop="datePublished"/></span></em>)</span>Fri May 22 14:22:38 CEST 2020Barcelona, SpainProceedings of IASS Annual Symposium 2019 – Structural Membranes 2019 Form and ForceOct. 7 - 10Point load Actuated Adaptive Gridshells: Methods for initial design and modeling2019initial modeling bonavia körner method vecvagare knippers shell modelling gridshell point 2019 design grid itke from:petraheim load wood architecture actuated Point load Actuated Adaptive Gridshells: Methods for initial design and modelinghttps://puma.ub.uni-stuttgart.de/bibtex/2946c9bbd52a2286eee41919fe871dd04/petraheimpetraheim2020-05-20T15:25:33+02:002019 actuated architecture bonavia design grid gridshell initial itke knippers körner load method modeling modelling point shell vecvagare wood <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Elaine Bonavia" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/0"><span itemprop="name">E. Bonavia</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Vecvagare" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/1"><span itemprop="name">S. Vecvagare</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Axel Körner" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/2"><span itemprop="name">A. Körner</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Dylan Wood" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/3"><span itemprop="name">D. Wood</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Knippers" itemprop="url" href="/person/1261193b0887bc4dca8cd387a63061a0e/author/4"><span itemprop="name">J. Knippers</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Proceedings of IASS Annual Symposium 2019 – Structural Membranes 2019 Form and Force</span>, </em></span><em>Barcelona, Spain, </em>(<em><span>October 2019<meta content="October 2019" itemprop="datePublished"/></span></em>)</span>Wed May 20 15:25:33 CEST 2020Barcelona, SpainProceedings of IASS Annual Symposium 2019 – Structural Membranes 2019 Form and ForceOct. 7 - 10Point load Actuated Adaptive Gridshells: Methods for initial design and modeling20192019 actuated architecture bonavia design grid gridshell initial itke knippers körner load method modeling modelling point shell vecvagare wood Time-Based Aggregation of Flexibility at the TSO-DSO Interconnection Pointhttps://puma.ub.uni-stuttgart.de/bibtex/264d99067a24f095d6a63fca12fcac39d/annettegugelannettegugel2019-10-10T15:08:16+02:00Innterconnection Point TSO-DSO <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Daniel Contreras" itemprop="url" href="/person/1c228bfbc3aa8dc51c574eecd92cd8633/author/0"><span itemprop="name">D. Contreras</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Krzysztof Rudion" itemprop="url" href="/person/1c228bfbc3aa8dc51c574eecd92cd8633/author/1"><span itemprop="name">K. Rudion</span></a></span></span>. </span><span class="additional-entrytype-information">(<em><span>2019<meta content="2019" itemprop="datePublished"/></span></em>)</span>Thu Oct 10 15:08:16 CEST 2019Time-Based Aggregation of Flexibility at the TSO-DSO Interconnection Point2019Innterconnection Point TSO-DSO Numerical modelling of seismic slope failure using MPMhttps://puma.ub.uni-stuttgart.de/bibtex/254cdc8207e1c0a15d5eda2f8c09cce7c/hermannhermann2017-05-18T11:32:12+02:00Landslides; Large Method; Non-zero Point Slope condition; deformation; failure} kinematic {Material <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tushar Bhandari" itemprop="url" href="/person/19516033bc080c419374a68c96ee08473/author/0"><span itemprop="name">T. Bhandari</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Fursan Hamad" itemprop="url" href="/person/19516033bc080c419374a68c96ee08473/author/1"><span itemprop="name">F. Hamad</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Christian Moormann" itemprop="url" href="/person/19516033bc080c419374a68c96ee08473/author/2"><span itemprop="name">C. Moormann</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="K. G. Sharma" itemprop="url" href="/person/19516033bc080c419374a68c96ee08473/author/3"><span itemprop="name">K. Sharma</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernhard Westrich" itemprop="url" href="/person/19516033bc080c419374a68c96ee08473/author/4"><span itemprop="name">B. Westrich</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">COMPUTERS AND GEOTECHNICS</span>, </em> </span>(<em><span>May 2016<meta content="May 2016" itemprop="datePublished"/></span></em>)</span>Thu May 18 11:32:12 CEST 2017{THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}{COMPUTERS AND GEOTECHNICS}{MAY}{126-134}{Numerical modelling of seismic slope failure using MPM}{Article}{75}{2016}Landslides; Large Method; Non-zero Point Slope condition; deformation; failure} kinematic {Material {The Finite Element Method (FEM) is widely used in the simulation of
geotechnical applications. Owing to the limitations of FEM to model
problems involving large deformations, many efforts have been made to
develop methods free of mesh entanglement. One of these methods is the
Material Point Method (MPM) which models the material as Lagrangian
particles capable of moving through a background computational mesh in
Eulerian manner. Although MPM represents the continuum by material
points, solution is performed on the computational mesh. Thus, imposing
boundary conditions is not aligned with the material representation. In
this paper, a non-zero kinematic condition is introduced where an
additional set of particles is incorporated to track the moving
boundary. This approach is then applied to simulate the seismic motion
resulting in failure of slopes. To validate this simulation procedure,
two geotechnical applications are modelled using MPM. The first is to
reproduce a shaking table experiment where the results of another
numerical method are available. After validating the present numerical
scheme for relatively large deformation problem, it is applied to
simulate progression of a large-scale landslide during the Chi-Chi
earthquake of Taiwan in which excessive material deformation and
transportation is taking place. (C) 2016 Elsevier Ltd. All rights
reserved.}Random Mixing: An Approach to Inverse Modeling for Groundwater Flow and
Transport Problemshttps://puma.ub.uni-stuttgart.de/bibtex/21146cdb2cb2120cac1495799520c7522/hermannhermann2017-05-18T11:32:12+02:00Copula; Inverse Multiple mixing; modeling; point statistics} {Random <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Andras Bardossy" itemprop="url" href="/person/1ebc1acb5c6a1065a9ad744fc313e15ef/author/0"><span itemprop="name">A. Bardossy</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Sebastian Hoerning" itemprop="url" href="/person/1ebc1acb5c6a1065a9ad744fc313e15ef/author/1"><span itemprop="name">S. Hoerning</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">TRANSPORT IN POROUS MEDIA</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">114 </span></span>(<span itemprop="issueNumber">2, SI</span>):
<span itemprop="pagination">241-259</span></em> </span>(<em><span>September 2016<meta content="September 2016" itemprop="datePublished"/></span></em>)</span>Thu May 18 11:32:12 CEST 2017{233 SPRING ST, NEW YORK, NY 10013 USA}{TRANSPORT IN POROUS MEDIA}{SEP}{2, SI}{241-259}{Random Mixing: An Approach to Inverse Modeling for Groundwater Flow and
Transport Problems}{Article}{114}{2016}Copula; Inverse Multiple mixing; modeling; point statistics} {Random {This paper presents a novel methodology for inverse modeling of
groundwater flow and transport problems in a Monte Carlo framework,
i.e., multiple solutions to the inverse problem are generated. The
methodology is based on the concept of random mixing of spatial random
fields. The conditional target hydraulic transmissivity field is
obtained as a linear combination of unconditional spatial random fields.
The corresponding weights of the linear combination are selected such
that the spatial variability of the hydraulic transmissivities as well
as the actual observed transmissivity values are reproduced. The
constraints related to the hydraulic head and contaminant concentration
observations are nonlinear. In order to fulfill these constraints, a
specific property of the presented approach is used. A connected domain
of fields fulfilling all linear constraints is identified. This domain
includes an infinite number of realizations, and in this domain, the
head and concentration deviations are minimized using standard
continuous optimization techniques. The methodology uses spatial copulas
to describe the spatial dependence structure. A combination with
multiple point statistics allows inversion under specific structural
constraints.}