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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121-130 订阅

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Investigation of process parameters in CuAl8 deposition under the influence of different material deposition angles via CMT-based WAAM process 23

Investigation of process parameters in CuAl8 deposition unde...

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23rd international conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2023

作者： Shah, Abid Zeidler, Henning Krinke, Stefan Technische Universität Bergakademie Freiberg IMKF Additive Manufacturing Agricolastraße 1 Freiberg09599 Germany

ISBN: (纸本)9781998999132

Wire arc additive manufacturing (WAAM) is an emerging technology for additive manufacturing of metals due to its prominent features of high production rate and low energy consumption. Additive Manufacturing (AM) produces parts/products through a layer-by-layer material deposition. The material used is copper-based alloy wire CuAl8 (ERCuAl-A1). Copper-based alloys are arc weldable by choosing suitable process parameters, but this weldability is lower than steel. The main challenge in such types of materials is high thermal conductivity. Additionally, welding copper-based alloys is more challenging in inclined positions like PB (horizontal) and PC (transverse) than welding in PA (normal) position. This issue has to be investigated for producing components with complex geometries where material deposition in inclined positions is required. This research study investigates the effect of process parameters, i.e., different wire feed speed to torch travel speed ratios on the weld bead geometry produced via Cold Metal Transfer (CMT) based WAAM process in different welding orientations. different ratios of wire feed and torch travel speed will be used in each position, and the deposition angles used for this investigation are 0°, 30°, 60° and 90°. This work showed the feasibility of copper-based alloy deposition in inclined positions and showed that wire feed speed and torch speed significantly affect the weld bead geometry. This study also showed that as the deposition angles increases, the possibility of depositing ERCuAl-A1 decreases and the highest width-to-height ratio was obtained in the PA position. © 2023 Euspen Headquarters.

关键词： 3d printing

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Comprehensive Study of digital Restoration of Buddha Statues in Qingzhou by 3d technology 12th

Comprehensive Study of Digital Restoration of Buddha Statues...

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12th international conference on digital Human Modeling and Applications in Health, Safety, Ergonomics and Risk Management (dHM) Held as Part of the 23rd international conference on Human-Computer Interaction (HCII)

作者： Su, Yunqiao Shandong Coll Arts & Design 1255 Coll Rd Jinan Peoples R China

ISBN: (纸本)9783030778194;9783030778200

The significance of the digital restoration of the Buddha statue in Qingzhou by three-dimensional technology lies in the use of three-dimensional digital technology to study the style, craft and artistic characteristics of the restoration of the Buddha statue in Qingzhou, and to explore the laws contained therefrom. Thus open up a new horizon of Qingzhou style Buddha statue research and aesthetics, and deepen the research connotation of archaeological disciplines. It not only interprets the overall restoration and beauty of Qingzhou-style Buddha statues from a new perspective, but also explores new integration points between archaeology, science and technology and art.

关键词： Qingzhou Buddha statue 3d digitalization Recovery performance

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Classification of driver Gene Mutations from 3d-CT Images Based on Radiomics Features 23

Classification of Driver Gene Mutations from 3D-CT Images Ba...

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23rd international conference on Control, Automation and Systems, ICCAS 2023

作者： Watanabe, Shion Kamiya, Tohru Terasawa, Takashi Aoki, Takatoshi Kyushu Institute of Technology 1-1 Sensui Tobata Kitakyushu Fukuoka804-8550 Japan University of Occupational and Environmental Health 1-1 Iseigaoka Yahatanishi Kitakyushu Fukuoka807-8555 Japan

ISBN: (纸本)9788993215274

Cancer is a leading cause of death worldwide, accounting for nearly 10 million deaths in 2020. Lung cancer is the most common cause of death from this cancer. diagnosis is made mainly by biopsy, which checks for mutations in the driver genes of lung cancer. If there is a mutation, molecularly targeted drugs with higher therapeutic efficacy can be used. However, it is difficult for physicians to make a decision and places a heavy burden on patients. To solve this problem, a computer aided diagnosis (CAd) system is needed to identify the presence or absence of driver gene mutations from CT images. In this paper, Radiomics is used to extract features from 3d lung cancer in CT images and analyze them using machine learning to classify the presence or absence of mutations. Because the features obtained is huge, dimensionality reduction is performed using Null Importance. Furthermore, the accuracy is improved by adding gender as clinical information. The proposed method was applied to a dataset consisting of 175 cases. As a result, we obtained an AUC (Area Under the Curve) of 0.985, accuracy of 92.0%, true positive rate of 85.7%, and false positive rate of 2.20%. © 2023 ICROS.

关键词： Computer aided diagnosis

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Hearing loss and hearing aid simulations for accessible user experience 23

Hearing loss and hearing aid simulations for accessible user...

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

作者： Reyes-Lecuona, Arcadio Cuevas-Rodriguez, Maria Gonzalez-Toledo, daniel Molina-Tanco, Luis Poirier-Quinot, david Picinali, Lorenzo Univ Malaga Telecommun Res Inst TELMA Malaga Spain Sorbonne Univ Inst Alambert Paris France Imperial Coll London Audio Experience Design AXD London England

ISBN: (纸本)9798400707902

This paper presents an open-source real-time hearing loss and hearing aids simulator implemented within the 3d Tune-In Toolkit C++ library. These simulators provide a valuable tool for improving auditory accessibility, promoting inclusivity and foster new research. The hearing loss simulator accurately simulates various types and levels of hearing loss, while the hearing aid simulator replicates different hearing aid technologies, allowing for the simulation of real-world hearing aid experiences. Both simulators are implemented to work in real-time, allowing for immediate feedback and adjustment during testing and development. As an open-source tool, the simulators can be customised and modified to meet specific needs, and the scientific community can collaborate and improve upon the algorithms. The technical details of the simulators and their implementation in the C++ library are presented, and the potential applications of the simulators are discussed, showing that they can be used as a valuable support software for UX designers to ensure the accessibility of their products to individuals with hearing impairment. Moreover, these simulators can be used to raise awareness about auditory accessibility issues. Overall, this paper also aims to provide some insight into the development and implementation of accessible technology for individuals with hearing impairments.

关键词： Hearing loss simulation hearing aid Real time audio auditory perception 3d audio

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Atomic-scale study of Cu-Cu direct bonding with assistance of Cu nanoparticles as joining medium by molecular dynamics simulation 23

Atomic-scale study of Cu-Cu direct bonding with assistance o...

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23rd international conference on Electronic Packaging technology (ICEPT)

作者： Zheng, deng-Wu Zhou, Min Bo Liu, Shuai Ke, Chang-Bo Zhang, Xin-Ping South China Univ Technol Sch Mat Sci & Engn Guangdong Prov Engn Technol R&D Ctr Elect Packagi Guangzhou Peoples R China

ISBN: (数字)9781665499057

ISBN: (纸本)9781665499057

The application of Cu-Cu direct bonding in stacked chips is becoming an alternative to the traditional solder-bump joint during the development of three-dimensional integrated circuits (3d IC). In this paper, the self-sintering between copper nanoparticles (Cu NPs) and the sintering between copper nanoparticle (Cu NP) and copper substrate (metallization) are simulated by molecular dynamics method. The results show that Cu atoms move mainly by interdiffusion between adjacent Cu NPs during the early and middle stages of sintering process, and the self-sintering of Cu NPs occurs first. In the late stage of sintering process, Cu atoms begin to diffuse at the contact interface between Cu NP and Cu metallization, and Cu NPs are sintered with Cu metallization. In addition, the simulation results of the effects of sintering temperature and particle size of Cu NPs on the Cu-Cu sintering behavior manifest that a relatively higher sintering temperature and smaller particle size of Cu NPs can better promote the self-sintering between Cu NPs and the sintering between Cu NP and Cu metallization. It is also found that the suitable sintering temperature of Cu NP and Cu metallization is between 450 K and 600 K, and the particle size has little effect on the diffusion distribution of Cu atoms in Cu NPs and Cu metallization during the sintering process.

关键词： Cu-Cu direct bonding Cu nanoparticle sintering molecular dynamics three-dimensional package

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deep-Net: Brain Lesion Segmentation with 3d CNN and Residual Connections 23th

Deep-Net: Brain Lesion Segmentation with 3D CNN and Residual...

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23rd international conference on Intelligent Systems design and Applications, ISdA 2023

作者： Guennich, Ala Othmani, Mohamed Ltifi, Hela National Engineering School of Sfax University of Sfax BP 2100 Gafsa Tunisia Research Lab: Technology Energy and Innovative Materials Lab Faculty of Sciences of Gafsa University of Gafsa Gafsa Tunisia Faculty of Sciences of Gafsa University of Gafsa BP 2100 Gafsa Tunisia Faculty of Sciences and Technology of Sidi Bouzid BP 9100 Sidi Bouzid Tunisia Research Lab: RGIM-Lab ENIS Sfax Tunisia

ISBN: (纸本)9783031647758

The utilization of precise automated algorithms in the segmentation of brain tumors has the potential to enhance disease diagnosis, streamline treatment monitoring, and facilitate comprehensive studies of pathology on a large scale. This innovative approach not only enhances the efficiency of the model but also exhibits significant promise for segmentation tasks, particularly within the realm of medical imaging. Leveraging the residual connections of the initial layer, the proposed convolutional neural network (CNN) produces segmentation results that are more accurate and robust. Its adaptability to diverse datasets and improved generalization capabilities positions it as a valuable asset for in-depth imaging studies. during the testing phase on the Brats 2015 training database, the performance of the proposed method demonstrated excellence compared to alternative architectural configurations. Through a comparative analysis, we illustrate the effectiveness of integrating residual connections into the first layer of our approach. Our approach has undergone testing using the BRATS 2015 training database, demonstrating robust performance despite the simplicity of the pipeline. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Semantic Segmentation

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Parallel Algorithm for Concurrent Integration of Three-dimensional B-Spline Functions 23rd

Parallel Algorithm for Concurrent Integration of Three-Dim...

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23rd international conference on Computational Science, ICCS 2023

作者： Szyszka, Anna Woźniak, Maciej AGH University of Science and Technology Kraków Poland

ISBN: (纸本)9783031360206

In this paper, we discuss the concurrent integration applied to the 3d isogeometric finite element method. It has been proven that integration over individual elements with Gaussian quadrature is independent of each other, and a concurrent algorithm for integrating a single element has been created. The suboptimal integration algorithm over each element is developed as a sequence of basic atomic computational tasks, and the dependency relation between them is identified. We show how to prepare independent sets of tasks that can be automatically executed concurrently on a GPU card. This is done with the help of diekert’s graph, which expresses the dependency between tasks. The execution time of the concurrent GPU integration is compared with the sequential integration executed on CPU. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Finite element method

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Simplification and Compression Method Based on Classified Sparse Sampling for LidAR Point Cloud 23

Simplification and Compression Method Based on Classified Sp...

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23rd IEEE international conference on High Performance Computing and Communications, 7th IEEE international conference on data Science and Systems, 19th IEEE international conference on Smart City and 7th IEEE international conference on dependability in Sensor, Cloud and Big data Systems and Applications, HPCC-dSS-SmartCity-dependSys 2021

作者： Chen, Jian Lin, YuFang Chen, YuanXiang Zheng, MingKui Zhu, YuYao School of Advanced Manufacturing Fuzhou University Quanzhou China College of Physics and Information Engineering Fuzhou University Fuzhou China Beijing Ctr. Fujian Br. Patent Examin. Cooperation Center of the State Intellectual Property Office Fuzhou China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou China

ISBN: (纸本)9781665494571

As a key component of point cloud acquisition technology, LidAR (Light detection and Ranging) acts as an eye in autonomous driving. The vehicle-mounted LidAR point cloud system is the prerequisite foundation for the vehicle to be able to perform environmental perception, path planning, navigation, and other behaviors. In practical applications, LidAR point clouds have a wide distribution range and a large amount of data, which poses major challenges to existing transmission and storage technologies. Aiming at the point cloud from automotive LidAR in autonomous driving, we propose a point cloud lossy compression framework based on range image index and classified sparse sampling. This paper takes the original data packet as the compression target and converts it into a 2d range image and a 3d point cloud based on its data characteristics. On this basis, we can segment 3d point clouds into ground point and non-ground point cloud by applying progressive morphological filters. Then, we perform de-redundant sparse processing at different intensities on the two. A sparse 2d range image is generated by referring to the range image index of the downsampling 3d point cloud and is represented as a more compact form of one-dimensional range vector combined with its corresponding occupancy image and Morton sorting. Finally, the image coding method is used to further compress the point cloud. Experimental results show that our proposed method is better than the existing algorithms, thereby effectively reducing the spatial redundancy of the point cloud and achieving higher reconstruction quality. © 2021 IEEE.

关键词： Point cloud compression Image coding Laser radar Three-dimensional displays Smart cities Redundancy Prediction algorithms

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An Improved Mold Flow Optimization technology for High-density Power Modules 23

An Improved Mold Flow Optimization Technology for High-Densi...

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23rd international conference on Electronic Packaging technology (ICEPT)

作者： Yang, Li Cai, Zhikuang Xu, Binbin Huang, Shoukun Liu, Lu Nanjing Univ Posts & Telecommun Coll Int Circuit Sci & Engn Natl & Local Joint Engn Lab RF Integrat & Micro A Nanjing Peoples R China Nanjing Univ Posts & Telecommun Nantong Inst Nanjing Peoples R China

ISBN: (数字)9781665499057

ISBN: (纸本)9781665499057

during the plastic packaging process, voids and weld lines are common problems. As the volume of Power Modules is becoming smaller and thinner, more and more attention has been paid to solve the void defects. Power Modules have complex structures and dense components, which may cause void risks. In this article, an improved 3d mold flow technology for High-density Power Modules package is conducted to predict the location of the voids generation and the number of weld lines throughout the plastic encapsulation process, which is mainly about to find the best optimization to reduce the risk of voids through the two parts. The first part is including three aspects which are gate locations, viscosity property of materials, and segment injection. According to the simulation verification, the results show that the best gate location and a reasonable range of viscosity properties for the material can effectively decrease the voids risk. In addition, segment injection has more advantages than uniform injection in terms of reducing voids risks When the melt flows through the top of the highest component of Power Module package. The second part is the verification of doEs (design of Experiments) that show the influence of the solder ball size and ball to substrate area ratio on the number of weld lines by comparing different kinds of experiments. The results show that the smaller the balls size, and the pitch is not sufficiently large, the greater the number of weld lines. Therefore, through the comparison of the above experimental data, it is very necessary to find an optimal scheme to reduce production defects during the molding process of the products, and greatly improve the reliability of the product.

关键词： Mold Flow Voids Weld lines doEs

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developing an Immersive Virtual Reality Interface for Urban digital Twins: Integrating CAVE and HMd Systems for Enhanced Urban Analysis 23

Developing an Immersive Virtual Reality Interface for Urban ...

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23rd RoEduNet conference: Networking in Education and Research, RoEduNet 2024

作者： Bunea, Andrei Alexandru dobre, Ciprian Mihai POLITEHNICA Bucharest National University of Science and Technology Department of Computer Science Bucharest Romania

ISBN: (纸本)9798331540388

Understanding and managing the complexities of urban environments poses significant challenges due to dynamic changes in population, climate, traffic, and infrastructure. Building solutions to tackle the challenges that cities face is a complex task, as scientists and engineers need to understand the impact of their project and anticipate any weaknesses or harmful side effects. The presented research leverages advances in digital Twin and Virtual Reality (VR) technologies to provide a powerful tool for scientists and engineers to analyze, understand, and address urban problems in a controlled virtual setup. The research focuses on creating an immersive presentation interface for a digital copy of an urban surface, pursuing two main research directions. First, scientific literature reviews and experiments were conducted to analyze methods for capturing, storing, modifying, and rendering realistic virtual cities. Second, we present details on implementing an immersive VR environment using both Cave Automatic Virtual Environment (CAVE) and Head-Mounted displays (HMds) setups to render digital twins of cities. Using these two virtual reality techniques, our research aims to create the foundation to simulate realistic scenarios inside virtual urban areas, enhancing user immersion through precise 3d replication and realistic projections. The implementation of our presented work will facilitate better decision-making in areas such as pollution management, infrastructure development, traffic control, and disaster response as the research progresses. © 2024 IEEE.

关键词： Virtual environments

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