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检索条件"任意字段=23rd ACM International Conference on 3D Web Technology"

共 771 条记录，以下是421-430 订阅

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Learning-Based Shape Estimation with Grid Map Patches for Realtime 3d Object detection for Automated driving

Learning-Based Shape Estimation with Grid Map Patches for Re...

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international conference on Intelligent Transportation

作者： Hendrik Königshof Christoph Stiller Intelligent Systems and Production Engineering FZI Research Center for Information Technology Karlsruhe Germany Institute of Measurement and Control Systems Karlsruhe Institute of Technology (KIT) Karlsruhe Germany

ISBN: (数字)9781728141497

ISBN: (纸本)9781728141503

3d object detection serves as a crucial basis of visual perception, motion prediction, and planning for automated driving. To apply an algorithm for this purpose, the detection of all types of road users in real-time is an essential condition. In this paper, we propose an approach that projects the 3d points of image-based bounding box proposals into so-called grid map patches. These patches are used to estimate the exact dimensions of the 3d box with the help of a lightweight CNN. The complete proposed processing chain is parallelized and implemented on a GPU. This makes our approach the fastest stereo-based 3d object detector on the KITTI benchmark while still achieving results that are within the range of the best image-based algorithms.

关键词： Three-dimensional displays Encoding Two dimensional displays Shape Object detection Estimation Training data

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TopNet: Topology Preserving Metric Learning for Vessel Tree Reconstruction and Labelling 23rd

TopNet: Topology Preserving Metric Learning for Vessel Tree ...

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23rd international conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2020

作者： Keshwani, deepak Kitamura, Yoshiro Ihara, Satoshi Iizuka, Satoshi Simo-Serra, Edgar Imaging Technology Center Fujifilm Corporation Minato Japan Center for Artificial Intelligence Research University of Tsukuba Tsukuba Japan Department of Computer Science and Engineering Waseda University Shinjuku Japan

ISBN: (纸本)9783030597245

Reconstructing Portal Vein and Hepatic Vein trees from contrast enhanced abdominal CT scans is a prerequisite for preoperative liver surgery simulation. Existing deep learning based methods treat vascular tree reconstruction as a semantic segmentation problem. However, vessels such as hepatic and portal vein look very similar locally and need to be traced to their source for robust label assignment. Therefore, semantic segmentation by looking at local 3d patch results in noisy misclassifications. To tackle this, we propose a novel multi-task deep learning architecture for vessel tree reconstruction. The network architecture simultaneously solves the task of detecting voxels on vascular centerlines (i.e. nodes) and estimates connectivity between center-voxels (edges) in the tree structure to be reconstructed. Further, we propose a novel connectivity metric which considers both inter-class distance and intra-class topological distance between center-voxel pairs. Vascular trees are reconstructed starting from the vessel source using the learned connectivity metric using the shortest path tree algorithm. A thorough evaluation on public IRCAd dataset shows that the proposed method considerably outperforms existing semantic segmentation based methods. To the best of our knowledge, this is the first deep learning based approach which learns multi-label tree structure connectivity from images. © 2020, Springer Nature Switzerland AG.

关键词： deep learning

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Semantic 4-dimensional Modeling of VR Content in a Heterogeneous Collaborative Environment 18

Semantic 4-dimensional Modeling of VR Content in a Heterogen...

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23rd acm international conference on 3d web technology

作者： Flotynski, Jakub Sobocinski, Pawel Poznan Univ Econ & Business Poznan Poland

ISBN: (纸本)9781450358002

Interactive 3d content gains increasing use in VR/AR applications in different domains, such as education, training, engineering, spatial and urban planning as well as architectural and interior design. While modeling and presenting interactive 3d scenes in collaborative VR/AR environments, different 3d objects are added, modified and removed by different users, which leads to the evolution of the scenes over time. Representation of VR content covering temporal knowledge is essential to enable exploration of such time-dependent VR/AR content. However, the available approaches do not enable exploration of VR content with regards to its time-dependent components and properties, which limits their usage in web-based systems. The main contribution of this paper is 4-dimensional representation of VR content, which encompasses time being the fourth dimension. The representation is based on the semantic web standards and ontologies, which enable the use of domain knowledge for collaborative creation and exploration of content. This could improve the availability of VR/AR applications to domain specialists without expertise in 3d graphics and animation, thus improving the overall dissemination of VR/AR on the web. The representation has been implemented in a heterogeneous collaborative VR environment for urban design.

关键词： web 3d/VR/AR 3d content semantic web ontologies collaborative design

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defeating Lag in Network-distributed Physics Simulations An Architecture Supporting declarative Network Physics Representation Protocols 18

Defeating Lag in Network-Distributed Physics Simulations An ...

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23rd acm international conference on 3d web technology

作者： Peitso, Loren Brutzman, don Naval Postgrad Sch Monterey CA 93943 USA

ISBN: (纸本)9781450358002

Current shared worlds for games, simulations, AR, and VR rely on "good-enough" intuitively correct depictions of shared world state. This is inadequate to provide repeatable, verifiable results for decision-making, safety related/equipment-in-the-loop simulations, or distributed multi-user augmented reality. These require world representations which are physically correct to a designer-defined level of fidelity and produce repeatable, verifiable results. A network-distributed dynamic simulation architecture as illustrated in Figure 1 is presented, with consistent distributed state and selective level of physics-based fidelity with known bounds on transient durations when state diverges due to external input. Coherent dynamic state has previously been considered impossible.

关键词： Latency Lag Shared state X3d graphics

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Loss Analysis of Variable Speed Induction Motors Fed by Inverters Considering Inter-Bar Currents Using 3d Finite Element Method

Loss Analysis of Variable Speed Induction Motors Fed by Inve...

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international conference on Electrical Machines and Systems (ICEMS)

作者： Katsumi Yamazaki Ryouichi Ueda Ryouma Utsunomiya Motomichi Ohto Chiba Institute of Technology Japan YASKAWA ELECTRIC CORPORATION Japan

ISBN: (数字)9784886864192

ISBN: (纸本)9781728189307

This article describes loss analysis of variable speed induction motors fed by inverters by 3d nonlinear time-stepping finite element method (FEM), which takes the inter-bar currents into account. This analysis is carried out by a parallel computation. The calculated results are compared with experimental results to confirm the validity. It is clarified that the ratio of the inter-bar current loss increases under high speed conditions.

关键词： Finite element analysis Stator cores Induction motors Rotors Three-dimensional displays Mathematical model Inverters

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dynaMo - dynamic 3d Models for the web A declarative approach to dynamic and interactive 3d models on the web using x3dom 18

DynaMo - Dynamic 3D Models for the Web A declarative approac...

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23rd acm international conference on 3d web technology

作者： Krispel, Ulrich Settgast, Volker Fellner, dieter W. Graz Univ Technol Inst Comp Graph & Knowledge Visualizat CGV Graz Austria Fraunhofer Austria Res GmbH Graz Austria Tech Univ Darmstadt GRIS Darmstadt Germany Fraunhofer IGD Darmstadt Germany

ISBN: (纸本)9781450358002

Animations aid greatly to a presentation of a sophisticated man-made object. With additional interactivity, a user can explore such an object to gain even better understanding. The authoring of such dynamic models is often very resource demanding, as the animations and logic of interaction has to be expressed in an authoring program;often using a programming language. Furthermore, the 3d model and its dynamic capabilites are tightly coupled, which makes it costly to integrate changes of the underlying 3d model - e.g. if a machine part changes. Contribution and Benefit. We present a novel scheme to define varying states of a 3d model in a decoupled, declarative manner using pattern matching. Furthermore, we demonstrate its capabilites for the web with an open source JavaScript implementation that operates on an x3dom model.

关键词： animation x3dom declarative

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development of an affordable and sensitive diagnostic test for dengue disease using microfluidics and smartphones 23

Development of an affordable and sensitive diagnostic test f...

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23rd international conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2019

作者： Jégouic, Sophie M. Edwards, Alexander d. University of Reading United Kingdom Capillary Firm Technology Ltd United Kingdom

ISBN: (纸本)9781733419000

Point-of-care diagnostic (POCd) devices offer significant benefits to healthcare systems, especially in rapid diagnosis and detection of diseases for optimising treatment. Microfluidics will play a vital role in POCd by providing rapid, sensitive, portable, and low-cost devices. Here we report new methods of diagnosing dengue fever infection using a low-cost melt-extruded microfluidic material called Microcapillary Film (MCF) [1], 3d-printed devices, and smartphones. While the detection of protein biomarkers by enzyme-linked immunosorbent assay (ELISA) has been previously described [2,3], we demonstrate a new method for the detection of antibodies to dengue virus. Furthermore, we show for the first time the potential of MCF for nucleic acid (NA) detection by loop-mediated isothermal amplification (LAMP). © 2019 CBMS-0001.

关键词： Microfluidics

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Cell beads technology using microfluidic device as a new platform for vascularized organoid formation 23

Cell beads technology using microfluidic device as a new pla...

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23rd international conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2019

作者： Nagata, Shogo Takeuchi, Shoji Institute of Industrial Science University of Tokyo Japan Graduate School of Information Science and Technology University of Tokyo Japan University of Tokyo Japan

ISBN: (纸本)9781733419000

We found that spherical three-dimensional (3d) scaffold composed from extracellular-matrix (ECM) can be a new platform to generate vascularized organoids differentiated from human pluripotent stem cells (hPSC). To encapsulate human induced pluripotent stem cells (hiPSCs) and human vascular endothelial cells (hECs) into ECM-rich scaffolds, we used Axisymmetric Flow-Focusing devices (AFFd) technology, which our group previously established by using microfluidic device [1]. In the technique, we formed "cell beads" composed from hiPSCs, human umbilical vascular endothelial cells (HUVECs) and Matrigel, and differentiated the cell beads into neural organoids containing vascular endothelial cells. © 2019 CBMS-0001.

关键词： Cytology

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Additive manufacturing of a stretch forming die using 3d printing technology 23

Additive manufacturing of a stretch forming die using 3D pri...

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23rd international conference on Innovative Manufacturing Engineering and Energy (IManEE)

作者： Grigoras, C. Chirita, B. Brabie, G. Vasile Alecsandri Univ Bacau Dept Ind Engn Calea Marasesti St 157 Bacau Romania

3d printing is a maturing technology, that can be used from fast prototyping to industrial scale. A key aspect of 3d printing is the ability to control the material density, thus it's hardness. This factor assures that 3d printing is not only economical competitive, but it also provides parts with improved mechanical properties. Furthermore, it is a good alternative for manufacturing stretch-forming dies. Implementing 3d printed dies offers an economical advantage, as cost for producing are a fraction of the cost of standard metal die, and the technology behind the process is simpler. Therefore, in this paper we have chosen to study stretch forming on a die that has components 3d printed from polylactic acid (PLA). The length and width of the punch is maintained constant while the radius varied from R180 divided by R1080 [mm], with an increment of 180 [mm]. A total number of 6 punches were used in these experiments to stretch sheet metal stripes made of aluminium 2024-T0, a material specific for aircraft skin. In addition to the shape of the resulted part, in the present study other process parameters have been investigated (punch force, part radius and deviation from circularity).

关键词： 3d printers

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Rule and Reuse Based Lightweight Modeling and Real Time web3d Rendering of Forest Scenes 18

Rule and Reuse Based Lightweight Modeling and Real Time Web3...

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23rd acm international conference on 3d web technology

作者： Wang, Guan Zhang, dejia Zhou, Kaimao Jia, Jinyuan Tongji Univ Shanghai Peoples R China

ISBN: (纸本)9781450358002

How to model and visualize a large scale forest scenes in a realistic and lightweight way keeps to be an important problem in web3d Game and VR applications. This paper presents a novel solution to real time web3d visualization of huge forest scenes. The data size of huge forest scenes is reduced to very low level by reusing some branches repetitively, thus, which can be transmitted over mobile Internet and rendered web3d browsers instantly. However, the visual morphology and shaping variety of huge forest scenes can still be preserved with more straightforward hierarchical rules than L-System. From one sampling tree, we can extract it rules and grow them randomly to model large scale virtual forest scenes and render them lightweightly at web3d browsers. Experimental Results show our proposed method outperform the existing web3d forest modeling and rendering methods in terms of data volume, shaping polymorphism, networking bandwidth and web rendering and achieves instant web3d visualization of huge forest.

关键词： L-System web3d Instance Rendering Lightweight Forest Modeling

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