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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221-230 订阅

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Facial Symmetry Analysis for Cleft Lip Patients from 4d Point Cloud data

Facial Symmetry Analysis for Cleft Lip Patients from 4D Poin...

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international conference on Control, Automation and Systems ( ICCAS)

作者： Narumi Kihara Namiko Kimura-Nomoto Takako Okawachi Guangxu Li Norifumi Nakamura Tohru Kamiya Kyushu Institute of Technology Tobata Kitakyushu Japan Kagoshima University Sakuragaoka Kagoshima Japan Kagoshima Medical Center National Hospital Organization Shiroyama Kagoshima Japan Tiangong University XiQing District Tianjin China

Cleft lip is one of the most common birth defects. Several operations are performed to form a natural lip. A problem with these operations is that the criteria for the facial symmetry are unclear. Based on this background, we propose a method for evaluating the facial symmetry using 4d point cloud data. We evaluate the facial symmetry in two ways. One is based on the temporal changes in the face landmarks. Corresponding points are searched using two local geometric descriptors. The results are approximated to the 3d lines and these slopes are compared to obtain the left-right difference of the movement. The other is based on the center of gravity. The lip part is extracted from the point cloud and divided into subregions. The centroid coordinates are then calculated for each subregion and compared to obtain the left-right difference of the facial structure. The experiment is performed using artificially generated 4d data. As an experimental result, it is shown that our method can find point correspondences with smaller error than comparative methods.

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Voxel-Based Route-Search Algorithm for Tumor Navigation and Blood Vessel Avoidance

Voxel-Based Route-Search Algorithm for Tumor Navigation and ...

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23rd international conference on Human-Computer Interaction (HCII)

作者： Kunii, Takahiro Asano, Miho Noborio, Hiroshi Kashina Syst Co Hikone Japan Kyoto Univ Hosp Preempt Med & Lifestyle Related Dis Res Ctr Kyoto Japan Osaka Electrocommun Univ Dept Comp Sci Shijo Nawate Japan

ISBN: (纸本)9783030784652;9783030784645

In this study, we propose an algorithm that determines a simple-shaped surgical path from the liver surface to its malignant tumor in 3d voxel space. The method has a good affinity with dICOM (digital Imaging and Communications in Medicine standards) captured by MRI (Magnetic Resonance Imaging) or CT (computed tomography). It also accounts for voxel density, which reflects the probability of the existence of blood vessels along the cutting path. The algorithm selects a path that avoids high-density voxels and the entangled blood vessels that spawn them.

关键词： Surgical path Navigation 3d voxel space

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Mixed Reality Interface for Load Application in Finite Element Analysis 13th

Mixed Reality Interface for Load Application in Finite Eleme...

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13th international conference on Social Computing and Social Media (SCSM) part of the 23rd international conference on Human-Computer Interaction (HCI)

作者： Poh, Emran Liong, Kyrin Lee, Jeannie S. A. Singapore Inst Technol Infocomm Technol Singapore Singapore Singapore Inst Technol Engn Singapore Singapore

ISBN: (纸本)9783030776251;9783030776268

Finite Element Analysis (FEA) is an integral process in manufacturing design, providing assurance of quality and structural integrity of a manufactured item. FEA involves conducting rigorous stress simulations on a designed model to study its structural behaviour when under specific loading scenarios. Current FEA tools involve viewing and manipulating the 3d model displayed on a monitor screen. A Mixed Reality (MR) user interface allowing for direct manipulation and specification of loading scenarios on a designed model was developed, thus enabling design engineers to find new ways of interacting and visualising FEA results for analysis and thus reducing unnecessary prototyping costs. Three gesture interfaces were developed to allow application of load parameters on a surface of a model, namely: Point-Apply, Point-Hold, and Point-drag. A pilot evaluation was conducted to study the suitability of each as an interface designed for engineers. Results suggest that Point-Hold is empirically the most usable interface compared to the other interfaces.

关键词： Finite Element Analysis Mixed reality Gesture 3d user interface digital twin

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Research on Key Technologies of 3d Model database Based on Network Platform 3

Research on Key Technologies of 3D Model Database Based on N...

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3rd international conference on Artificial Intelligence and Advanced Manufacture, AIAM 2021

作者： Tao, Ye Song, Miaorui Lanzhou Institute of Technology Gansu Lanzhou730050 China Gansu Academy of Mechanical Sciences Gansu Lanzhou730030 China

ISBN: (纸本)9781450385046

due to the low efficiency of traditional manufacturing industry design, it cannot achieve reuse and resource sharing, it is necessary to design 3d model database based on network platform. ISO 13584 (parts library, PLIB) standard can transfer the data of supplier library. According to plib-42 standard, the part library is constructed, and the step method is used to share and exchange the part library information, through the network interface and Internet, we can build a web-based shared resource library. According to the geometric view expression technology, the interface of Pro / E, CATIA and inventor is developed. This paper starts with the technical research and engineering application, the construction of part library and the development of geometric programming interface are introduced in detail, the format and development method of geometry program file are proposed, Completed the standard parts model library system. Provide design resources for modular design system to realize the information integration and network collaborative design of part resources, It is of great significance to improve the speed of mechanical product design and development. © 2021 acm.

关键词： 3d modeling

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Preface of MEPdaW 2022: Managing the Evolution and Preservation of the data web 8

Preface of MEPDaW 2022: Managing the Evolution and Preservat...

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8th Workshop on Managing the Evolution and Preservation of the data web, MEPdaW 2022

作者： Graux, damien Orlandi, Fabrizio Niazmand, Emetis Ydler, Gabriela Vidal, Maria-Esther Inria Université Côte d’Azur CNRS I3S France ADAPT SFI Centre Trinity College Dublin Ireland Leibniz Information Centre for Science and Technology University Library TIB Germany Leibniz University of Hannover Germany

The MEPdaW workshop series targets one of the emerging and fundamental problems of the web, specifically the management and preservation of evolving knowledge graphs. during the past eight years, the workshop series has been gathering a community of researchers and practitioners around these challenges. To date, the series has successfully published more than 40 articles allowing more than 50 individual authors to present and share their ideas. This 8th edition, virtually co-located with the international Semantic web conference (ISWC 2022), gathered the community around six research publications. The event took place online on the 23rd of October, 2022. © 2022 Copyright for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 international (CC BY 4.0).

关键词： Resource description Framework (rdF)

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Application of the Hyperledger Fabric Blockchain in a supply and maintenance chain for critical assets 2021

Application of the Hyperledger Fabric Blockchain in a supply...

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23rd international conference on Information Integration and web Intelligence, iiWAS 2021

作者： Baglietto, Pierpaolo Maresca, Massimo Parodi, Andrea Senatori, davide CIPI - University of Genoa Italy M3S Srl Italy

ISBN: (纸本)9781450395564

The permissioned Blockchain technology is widely proposed to improve of the integration between different companies, providing a non-intermediated infrastructure to enforce trusts within a consortium. A typical case-study for assessing the real impact of this technology is the classical "supply-chain"scenario. The work described in this paper targeted the application of a permissioned Blockchain (Hyperledger Fabric) for a particular "supply-chain"use case in which the traded assets within the consortium are both highly technological physical components and intangible assets, such as the skills of the operators, in the domain of military aircraft maintenance. In such scenario, the assets are not simply purchased and bought along the supply chain, but there is the need for highly efficient, certified maintenance operations. We called this scenario "supply and management chain", and the work described aimed at providing a permissioned Blockchain infrastructure supporting it. © 2021 acm.

关键词： Supply chains

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A Semi-Fragile Reversible Watermarking for 3d Models Based on IQIM with dual-Strategy Partition Modulation

A Semi-Fragile Reversible Watermarking for 3D Models Based o...

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IEEE international conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Fei Peng Yousheng Liang Min Long School of Artificial Intelligence Guangzhou University Guangzhou China School of Electronics and Communication Engineering Guangzhou University Guangzhou China

ISBN: (数字)9798331506209

ISBN: (纸本)9798331506216

Aiming at reducing the embedding distortion and improving tamper localization accuracy, a semi-fragile reversible watermarking for 3d models based on IQIM (improved quantization index modulation) with dual-strategy partition modulation is proposed. Firstly, watermark is built based on the position data of vertices and the number of neighboring vertices within the first ring. With IQIM, a dual-strategy partition based on the relationship between the position of quantization coefficients within quantization units and the watermark information is built. It performs single or dual modulation of IQIM to vertices, which is helpful for reducing the distortion induced by watermark embedding in the 3d models. during watermark extraction and data recovery, the watermark is first extracted based on the model vertex information and the original watermark is regenerated. The dual-strategy partition is performed based on the relationship between the position of quantization coefficient within quantization units and the regenerated watermark. Then, the model vertices are respectively recovered. Finally, by comparing the consistency between the extracted and regenerated watermarks, the integrity of the 3d model can be authenticated and the tampered area can be located. The experiments and analysis show that it outperforms several cutting-edge techniques from the aspects of embedding distortion and tamper localization capability.

关键词： Location awareness Solid modeling Three-dimensional displays Quantization (signal) Accuracy Computational modeling Modulation Watermarking distortion data mining

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design of an Electron Gun and PPM Focusing System for Low-voltage W-band TWTs

Design of an Electron Gun and PPM Focusing System for Low-vo...

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international conference on Vacuum Electronics

作者： Huanli Ji Jinsheng Yang Ji Chen Jun Cai Jinjun Feng Vacuum Electronics Department National Key Laboratory of Science and Technology Beijing Vacuum Electronics Research Institute Beijing China

This paper displays a design of an electron Gun and PPM focusing system with 12.6 kV for W-band TWTs. The focus electrode dimensions are swept to optimize the emitted cathode current and gunpot by employing Opera 3d t...

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Thread rolling repair method for 3d printed bolts 23

Thread rolling repair method for 3D printed bolts

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23rd international conference on Engineering design, ICEd 2021

作者： Katzwinkel, Tim Mohammad, Esanula Silberkuhl, Philipp Löwer, Manuel Institute for Product-Innovations University of Wuppertal Silbertool GmbH Product Safety and Quality Engineering University of Wuppertal

Within this paper, a new method for the quality refinement of external metric standard threads on 3d-printed bolts is presented. The repair method is based on the application of thread rolling technology, which is applied in terms of cold forming after the regular printing has been finished. The explorative study proves, that the investigated technology has a good potential to solve known precision issues in FdM 3d printing regarding the required accuracy for function fulfilling standardized threads. The application of thread rolling can be done manually and with minimal tool effort, which makes the technology particularly attractive for low cost applications. © ICEd *** right reserved.

关键词： Thread rolling

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3d User Interface in Virtual Reality 23rd

3D User Interface in Virtual Reality

引用

23rd international conference on Human-Computer Interaction (HCII)

作者： Yue, Gu Tsinghua Univ Beijing Peoples R China

ISBN: (纸本)9783030901769;9783030901752

Three dimensional user interfaces (3d UI) allow users to interact with virtual objects, environments, or information on the physical or virtual space. With the development of virtual reality technology, Tons of VR products tend to occupy the market quickly. However, the formulation of interface design specifications and the enhancement of user experience always be ignored. More than one-third of the users interrupted their experience during the market research because they did not understand the program operation. 3d UI is fundamental to Interactive in virtual space. Thus, this article introduces the basic overview of virtual reality, focusing on analyzing the main design differences between traditional and three-dimensional interfaces. This study's specific objective was to propose three-dimensional interface construction strategies mainly include: 1) Building a natural harmonious interaction relationship between man and machine;2) driving interface experience optimization through mental models. In particular, this research tries to establish the Paradigm of Theoretical Research of 3d user interface, which provides theoretical support for design in the future.

关键词： Virtual reality 3d UI User experience

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