Comput.最新文献 - Book学术

A U-Net Architecture for Inpainting Lightstage Normal Maps 用于绘制光场法线映射的 U-Net 架构

Comput. Pub Date : 2024-02-19 DOI: 10.3390/computers13020056

Hancheng Zuo, Bernard Tiddeman

{"title":"A U-Net Architecture for Inpainting Lightstage Normal Maps","authors":"Hancheng Zuo, Bernard Tiddeman","doi":"10.3390/computers13020056","DOIUrl":"https://doi.org/10.3390/computers13020056","url":null,"abstract":"In this paper, we investigate the inpainting of normal maps that were captured from a lightstage. Occlusion of parts of the face during performance capture can be caused by the movement of, e.g., arms, hair, or props. Inpainting is the process of interpolating missing areas of an image with plausible data. We build on previous works about general image inpainting that use generative adversarial networks (GANs). We extend our previous work on normal map inpainting to use a U-Net structured generator network. Our method takes into account the nature of the normal map data and so requires modification of the loss function. We use a cosine loss rather than the more common mean squared error loss when training the generator. Due to the small amount of training data available, even when using synthetic datasets, we require significant augmentation, which also needs to take account of the particular nature of the input data. Image flipping and inplane rotations need to properly flip and rotate the normal vectors. During training, we monitor key performance metrics including the average loss, structural similarity index measure (SSIM), and peak signal-to-noise ratio (PSNR) of the generator, alongside the average loss and accuracy of the discriminator. Our analysis reveals that the proposed model generates high-quality, realistic inpainted normal maps, demonstrating the potential for application to performance capture. The results of this investigation provide a baseline on which future researchers can build with more advanced networks and comparison with inpainting of the source images used to generate the normal maps.","PeriodicalId":10526,"journal":{"name":"Comput.","volume":"186 ","pages":"56"},"PeriodicalIF":0.0,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140449806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implementing Virtualization on Single-Board Computers: A Case Study on Edge Computing 在单板计算机上实现虚拟化：边缘计算案例研究

Comput. Pub Date : 2024-02-18 DOI: 10.3390/computers13020054

Georgios Lambropoulos, S. Mitropoulos, C. Douligeris, Leandros A. Maglaras

{"title":"Implementing Virtualization on Single-Board Computers: A Case Study on Edge Computing","authors":"Georgios Lambropoulos, S. Mitropoulos, C. Douligeris, Leandros A. Maglaras","doi":"10.3390/computers13020054","DOIUrl":"https://doi.org/10.3390/computers13020054","url":null,"abstract":"The widespread adoption of cloud computing has resulted in centralized datacenter structures; however, there is a requirement for smaller-scale distributed infrastructures to meet the demands for speed, responsiveness, and security for critical applications. Single-Board Computers (SBCs) present numerous advantages such as low power consumption, low cost, minimal heat emission, and high processing power, making them suitable for applications such as the Internet of Things (IoT), experimentation, and other advanced projects. This paper investigates the possibility of adopting virtualization technology on Single-Board Computers (SBCs) for the implementation of reliable and cost-efficient edge-computing environments.The results of this study are based on experimental implementations and testing conducted in the course of a case study performed on the edge infrastructure of a financial organization, where workload migration was achieved from a traditional to an SBC-based edge infrastructure. The performance of the two infrastructures was studied and compared during this process, providing important insights into the power efficiency gains, resource utilization, and overall suitability for the organization’s operational needs.","PeriodicalId":10526,"journal":{"name":"Comput.","volume":"34 1","pages":"54"},"PeriodicalIF":0.0,"publicationDate":"2024-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140452867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrocardiogram Signals Classification Using Deep-Learning-Based Incorporated Convolutional Neural Network and Long Short-Term Memory Framework 利用基于深度学习的卷积神经网络和长短期记忆框架对心电图信号进行分类

Comput. Pub Date : 2024-02-18 DOI: 10.3390/computers13020055

Alaa Eleyan, Ebrahim Alboghbaish

引用次数: 0

The Mechanism of Resonant Amplification of One-Dimensional Detonation Propagating in a Non-Uniform Mixture 在非均匀混合物中传播的一维爆破的共振放大机理

Comput. Pub Date : 2024-02-17 DOI: 10.3390/computation12020037

A. Lopato, Pavel Utkin

{"title":"The Mechanism of Resonant Amplification of One-Dimensional Detonation Propagating in a Non-Uniform Mixture","authors":"A. Lopato, Pavel Utkin","doi":"10.3390/computation12020037","DOIUrl":"https://doi.org/10.3390/computation12020037","url":null,"abstract":"The propagation of detonation waves (i.e., supersonic combustion waves) in non-uniform gaseous mixtures has become a matter of interest over the past several years due to the development of rotating detonation engines. It was shown in a number of recent theoretical studies of one-dimensional pulsating detonation that perturbation of the parameters in front of the detonation wave can lead to a resonant amplification of intrinsic pulsations for a certain range of perturbation wavelengths. This work is dedicated to the clarification of the mechanism of this effect. One-dimensional reactive Euler equations with single-step Arrhenius kinetics were solved. Detonation propagation in a gas with sine waves in density was simulated in a shock-attached frame of reference. We carried out a series of simulations, varying the wavelength of the disturbances. We obtained a non-linear dependence of the amplitude of these pulsations on the wavelength of disturbances with resonant amplification for a certain range of wavelengths. The gain in velocity was about 25% of the Chapman–Jouguet velocity of the stable detonation wave. The effect is explained using the characteristic analysis in the x-t diagram. For the resonant case, we correlated the pulsation period with the time it takes for the C+ and C− characteristics to travel through the effective reaction zone. A similar pulsation mechanism is realized when a detonation wave propagates in a homogeneous medium.","PeriodicalId":10526,"journal":{"name":"Comput.","volume":"168 ","pages":"37"},"PeriodicalIF":0.0,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140453363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Security and Privacy of Technologies in Health Information Systems: A Systematic Literature Review 医疗信息系统中技术的安全性和隐私性：系统性文献综述

Comput. Pub Date : 2024-01-31 DOI: 10.3390/computers13020041

Parisasadat Shojaei, Elena Vlahu-Gjorgievska, Yang-Wai Chow

引用次数: 0

Application of Immersive VR Serious Games in the Treatment of Schizophrenia Negative Symptoms 沉浸式虚拟现实严肃游戏在治疗精神分裂症阴性症状中的应用

Comput. Pub Date : 2024-01-31 DOI: 10.3390/computers13020042

Beatriz Miranda, P. Rego, Luís Romero, Pedro Miguel Moreira

引用次数: 0

Maxwell's True Current 麦克斯韦真实电流

Comput. Pub Date : 2024-01-31 DOI: 10.3390/computation12020022

Robert S. Eisenberg

引用次数: 0

Exploring Controlled Passive Particle Motion Driven by Point Vortices on a Sphere 探索由球面上的点涡流驱动的受控被动粒子运动

Comput. Pub Date : 2024-01-31 DOI: 10.3390/computation12020023

Carlos Balsa, Victoria Otero-Espinar, S. Gama

引用次数: 0

Error Pattern Discovery in Spellchecking Using Multi-Class Confusion Matrix Analysis for the Croatian Language 利用克罗地亚语多类混淆矩阵分析发现拼写检查中的错误模式

Comput. Pub Date : 2024-01-29 DOI: 10.3390/computers13020039

G. Gledec, Mladen Sokele, M. Horvat, M. Mikuc

引用次数: 0

CollabVR: VR Testing for Increasing Social Interaction between College Students CollabVR：增加大学生社交互动的虚拟现实测试

Comput. Pub Date : 2024-01-29 DOI: 10.3390/computers13020040

Diego Johnson, Brayan Mamani, Cesar Salas Arbaiza

{"title":"CollabVR: VR Testing for Increasing Social Interaction between College Students","authors":"Diego Johnson, Brayan Mamani, Cesar Salas Arbaiza","doi":"10.3390/computers13020040","DOIUrl":"https://doi.org/10.3390/computers13020040","url":null,"abstract":"The impact of the COVID-19 pandemic on education has accelerated the shift in learning paradigms toward synchronous and asynchronous online approaches, significantly reducing students’ social interactions. This study introduces CollabVR, as a social virtual reality (SVR) platform designed to improve social interaction among remote university students through extracurricular activities (ECAs). Leveraging technologies such as Unity3D for the development of the SVR environment, Photon Unity Networking for real-time participant connection, Oculus Quest 2 for immersive virtual reality experience, and AWS for efficient and scalable system performance, it aims to mitigate this social interaction deficit. The platform was tested using the sociability scale of Kreijns et al., comparing it with traditional online platforms. Results from a focus group in Lima, Peru, with students participating in online ECAs, demonstrated that CollabVR significantly improved participants perceived social interaction, with a mean of 4.65 ± 0.49 compared to traditional platforms with a mean of 2.35 ± 0.75, fostering a sense of community and improving communication. The study highlights the potential of CollabVR as a powerful tool to overcome socialization challenges in virtual learning environments, suggesting a more immersive and engaging approach to distance education.","PeriodicalId":10526,"journal":{"name":"Comput.","volume":"57 52","pages":"40"},"PeriodicalIF":0.0,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140487207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0