Article
Computer Science, Software Engineering
Hendrik Brueckler, David Bommes, Marcel Campen
Summary: Developments in the field of parametrization-based quad mesh generation on surfaces have been significant over the past decade. This study presents a method to robustly quantize volume parametrizations, leading to significantly improved flexibility in hexahedral mesh generation.
ACM TRANSACTIONS ON GRAPHICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Yanni Gao, Xudeng Hang, Guangwei Yuan
Summary: We propose a new sweeping solution method for the three-dimensional discrete ordinates equations of neutron transport on general hexahedral meshes. The method addresses the surface integrals and sweeping deadlocks and includes advancements in the discretization of non-planar cell faces and the development of a new sorting algorithm. Numerical experiments demonstrate the effectiveness of the proposed methods, and the theoretical analysis proves the convergence of the sweeping iterative method.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Computer Science, Software Engineering
Erkan Gunpinar, Marco Livesu, Marco Attene
Summary: Shape decompositions guided by a motorcycle graph have topological properties that are important for various engineering applications. This article compares two alternative approaches to compute volume shape decompositions and demonstrates that these methods outperform prior art in most cases.
COMPUTERS & GRAPHICS-UK
(2023)
Article
Computer Science, Artificial Intelligence
Vincent Leroy, Jean-Sebastien Franco, Edmond Boyer
Summary: The study proposes a new method that improves the performance of multi-view stereo reconstruction with recent advancements in deep networks. By scanning on depth maps of each camera, it replaces classic multi-view photoconsistency functions with a learned function.
INTERNATIONAL JOURNAL OF COMPUTER VISION
(2021)
Article
Mechanics
Chao Zhang, Qibing Li, Peng Song, Jiequan Li
Summary: This study extends the simulation method for two-dimensional compressible flows to three-dimensional simulations and improves the efficiency and compactness by utilizing subcell divisions and two-stage fourth-order time stepping. The method increases the efficiency of high-order reconstruction by subdividing each cell into a set of subcells and sharing the reconstruction among the subcells. Additionally, the method combines a time-dependent gas-kinetic flux solver and a two-stage fourth-order temporal discretization, avoiding the use of multi-stage Runge-Kutta methods.
Article
Computer Science, Software Engineering
Gang Xu, Ran Ling, Yongjie Jessica Zhang, Zhoufang Xiao, Zhongping Ji, Timon Rabczuk
Summary: This paper proposes an improved singularity structure simplification method for hexahedral meshes, using a weighted ranking approach that considers valence prediction, shape quality, and width of base complex sheets/chords. Adaptive refinement and local optimization are introduced to improve mesh element uniformity and aspect ratio. The weighted ranking approach results in a simpler singularity structure with fewer components and better mesh quality compared to thickness ranking methods.
COMPUTER-AIDED DESIGN
(2021)
Article
Engineering, Environmental
Xiaoxiao Li, Wenrong Lv, Gaohong Wu, Guangsheng Fu, Wenming Zhang, Zhanyu Li
Summary: A new Al battery with CuSe-Cu1.8Se heterogeneous structure was successfully designed and showed excellent electrochemical performance, with a specific capacity of 1440.4 mAh g(-1) and 607.3 mAh g(-1) at 1 A g(-1) charge and discharge, and a capacity retention of 185.8 mAh g(-1) after 200 cycles. The heterostructure demonstrated incredible flexibility and safety even after bending and shearing, indicating promising potential for future development of aluminum batteries.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Computer Science, Interdisciplinary Applications
Qingfeng Zhao, Gang Xu, Zhoufang Xiao, Haiyan Wu, Renshu Gu, Yang Liu, Yufei Pang
Summary: This paper proposes a new mesh matching algorithm based on base-complex structure for automatic generation of hexahedral meshes for complex geometries. The algorithm optimizes the base-complex structures of the sub-components and uses dual chord operations to match the interfaces between the sub-components. The proposed method requires fewer dual operations and produces higher quality elements near the interfaces.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Ruiyang Dai, Axel Modave, Jean-Francois Remacle, Christophe Geuzaine
Summary: This paper explores a family of generalized sweeping preconditioners for Helmholtz problems with non-overlapping checkerboard partition. By using high-order transmission conditions and cross-point treatments in the domain decomposition procedure, combined with the flexible version of GMRES, the rapid transfer of information between different areas and accelerated convergence can be achieved. Experimental results demonstrate the good performance of the preconditioners in different sweeping directions.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Multidisciplinary
Ying Zhou, Liang Gao, Hao Li
Summary: This paper presents a novel topology optimization method for the design of curved volumes filled with spatially-varying microstructures. It also develops a conformal sweeping approach to map the curved volume into a regular parameterization cube and match the curved geometry. The proposed method is illustrated through several examples of infill optimization design of curved swept volumes.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Ho-Young Kim, Hyun-Gyu Kim
Summary: This study introduces a novel scheme to generate trimmed hexahedral meshes for finite element analysis of solids with sharp features by modifying connectivity of initial elements with feature nodes and using Laplacian mesh smoothing technique. Polyhedral shape functions are effectively constructed based on feature-based tetrahedral subdomains to preserve sharp features during finite element analysis.
ENGINEERING WITH COMPUTERS
(2022)
Article
Acoustics
Lei Zhang, Yang Hu, Xue Wang, Olugbenga Abiola Fakayode, Haile Ma, Cunshan Zhou, Aiming Xia, Qun Li
Summary: The study found that using 60 kHz sweeping frequency ultrasound (SFU) to assist in soybean soaking can shorten soaking time, increase soluble protein content, reduce unpleasant beany flavor compounds, and enhance cell membrane permeability. Therefore, SFU can significantly improve the soaking efficiency of soybeans.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Engineering, Aerospace
Shaowen Chen, Tianhong Tu, Cong Zeng, Qinghe Meng
Summary: This study used large eddy simulation to investigate the effects of endwall pulsed jet and suction-surface sweeping jet actuator controls on corner separation. Modal analysis methods were applied to extract the main structures in the flow field and analyze the mechanism of unsteady jet effects. The results showed that both jet schemes could control corner separation through the induced small-scale flow structures or large-scale streamwise vortex.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
Michael Penwarden, Ameya D. Jagtap, Shandian Zhe, George Em Karniadakis, Robert M. Kirby
Summary: Physics-informed neural networks (PINNs) have attracted attention in the field of Computational Science and Engineering (CS&E) as a method for solving partial differential equations (PDEs). However, there is a recent focus on exploring training challenges and their impact on solving PDEs. This paper proposes a new stacked-decomposition method and introduces transfer learning concepts and tolerance-based propagation to accelerate computation. Additionally, a new time-sweeping collocation point algorithm is formulated to improve computational speed. These methods form a unified framework that overcomes training challenges in PINNs and XPINNs for time-dependent PDEs.
JOURNAL OF COMPUTATIONAL PHYSICS
(2023)
Article
Physics, Mathematical
Wei Leng, Lili Ju
Summary: In this paper, a novel diagonal sweeping domain decomposition method with source transfer is proposed and tested for solving the high-frequency Helmholtz equation. The method improves the efficiency of solving the system by employing a more efficient subdomain solving order. Numerical experiments demonstrate the effectiveness of the proposed method in achieving the exact solution of the global PML problem in a constant medium.
COMMUNICATIONS IN COMPUTATIONAL PHYSICS
(2021)
Letter
Computer Science, Information Systems
Qiang Fu, Hongbo Fu, Zhigang Deng, Xueming Li
SCIENCE CHINA-INFORMATION SCIENCES
(2022)
Article
Hospitality, Leisure, Sport & Tourism
Emily Baysden, Ninna Mendoza, Chishinga Callender, Zhigang Deng, Debbe Thompson
Summary: This research explores the reactions of adolescents to navigating an exergame with a self-representational avatar. Findings reveal that adolescents connected with their avatars, felt protective toward them, and this influenced their gameplay experience. Future research should examine the impact of this approach on gameplay frequency and intensity.
JOURNAL OF SPORT AND HEALTH SCIENCE
(2022)
Article
Surgery
Dehlela Shabir, Malek Anbatawi, Jhasketan Padhan, Shidin Balakrishnan, Abdulla Al-Ansari, Julien Abinahed, Panagiotis Tsiamyrtzis, Elias Yaacoub, Amr Mohammed, Zhigang Deng, Nikhil Navkar
Summary: This study evaluates different user-interface devices for transferring mentor's hand gestures to virtual surgical instruments movements. The results show that Oculus Rift is preferred in robotic scenarios, while touch haptic device is more suitable in manual scenarios for tele-mentoring.
INTERNATIONAL JOURNAL OF MEDICAL ROBOTICS AND COMPUTER ASSISTED SURGERY
(2022)
Article
Chemistry, Physical
Le Zhao, Q. Jane Wang, Xin Zhang, Kelsey B. Hatzell, Wahid Zaman, Tobias Martin, Zhanjiang Wang
Summary: This paper discusses the interface issues in solid-state lithium batteries and presents a 3D time-dependent electrokinetic model to study the effects of interface conformity, external pressure, electrolyte Young's modulus, and ionic conductivity on battery performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Surgery
Dehlela Shabir, Nihal Abdurahiman, Jhasketan Padhan, Malek Anbatawi, May Trinh, Shidin Balakrishnan, Abdulla Al-Ansari, Elias Yaacoub, Zhigang Deng, Aiman Erbad, Amr Mohammed, Nikhil Navkar
Summary: This study developed a tele-mentoring system for minimally invasive surgery, enabling the transfer of surgical knowledge from a mentor to a mentee through the internet. The system was evaluated in a simulated environment and validated through a user study, demonstrating its feasibility as a mentoring tool.
SURGICAL ENDOSCOPY AND OTHER INTERVENTIONAL TECHNIQUES
(2022)
Article
Computer Science, Software Engineering
Qiang Chen, Tingsong Lu, Yang Tong, Guoliang Luo, Xiaogang Jin, Zhigang Deng
Summary: This article proposes an efficient and practical model for simulating butterfly flights. The model utilizes parametric maneuvering functions and a force-based model to achieve dynamic control of the butterfly. The results demonstrate that the method can efficiently simulate realistic butterfly flight motions in various real-world settings.
ACM TRANSACTIONS ON GRAPHICS
(2022)
Article
Computer Science, Software Engineering
Jingyao Liu, Zhigang Deng, Tianlu Mao, Zhaoqi Wang
Summary: This article proposes a recurrent neural network based model, named R-CTM, for simulating heterogeneous traffic flow with multiple types of vehicles. Through experiments, the model demonstrates superior simulation accuracy and scalability.
COMPUTER ANIMATION AND VIRTUAL WORLDS
(2022)
Article
Computer Science, Software Engineering
Qixin Deng, Luming Ma, Aobo Jin, Huikun Bi, Binh Huy Le, Zhigang Deng
Summary: This article proposes an end-to-end system that automatically enhances coarse-scale 3D faces by synthesizing fine-scale geometric wrinkles. By formulating the problem as a supervised generation task and using a compact generative model, the system can generate plausible face wrinkles through effective sampling and interpolation. The article also introduces a complete pipeline to transfer the synthesized wrinkles between faces with different shapes and topologies. Through experiments, the method demonstrates its ability to synthesize realistic fine-scale wrinkles on various coarse-scale 3D faces with different shapes and expressions.
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
(2022)
Article
Computer Science, Cybernetics
Fei Lyu, Huijing Li, Qiang Fu, Yujie Liu, Jin Huang, Zhigang Deng
Summary: This paper investigates children's performance on mid-air gesture interactions in different spatial constraints and the age effect on such interaction scenarios. Based on the experiments, an improved design for UI menus based on mid-air gesture interaction for children is proposed.
INTERNATIONAL JOURNAL OF HUMAN-COMPUTER STUDIES
(2023)
Article
Computer Science, Software Engineering
Jiali Chen, Changjie Fan, Zhimeng Zhang, Gongzheng Li, Zeng Zhao, Zhigang Deng, Yu Ding
Summary: In this article, a fully automatic, deep learning based framework is proposed to synthesize realistic upper body animations based on novel guzheng music input. The proposed approach utilizes a generative adversarial network (GAN) to capture the temporal relationship between the music and the human motion data. Extensive experiments show that the method can generate visually plausible guzheng-playing animations that are well synchronized with the input guzheng music, outperforming the state-of-the-art methods. Ablation study validates the contributions of the carefully-designed modules in the framework.
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
(2023)
Proceedings Paper
Engineering, Biomedical
Jhasketan Padhan, Nikolaos Tsekos, Abdulla Al-Ansari, Julien Abinahed, Zhigang Deng, Nikhil V. Navkar
Summary: This paper presents a system for interventions using real-time Magnetic Resonance Imaging (rtMRI) and demonstrates its significant improvement in surgical tasks by reducing procedure duration and increasing safety in the presence of cardiac and breathing motion.
2022 IEEE 22ND INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOENGINEERING (BIBE 2022)
(2022)
Proceedings Paper
Engineering, Biomedical
Dehlela Shabir, Malik Anbatawi, Nihal Abdurahiman, May Trinh, Jhasketan Padhan, Abdulla Al-Ansari, Julien Abinahed, Zhigang Deng, Elias Yaacoub, Amr Mohammed, Nikhil V. Navkar
Summary: Telementoring in surgery utilizes augmented reality to overlay visual cues from the mentor onto the operative field of the mentee, facilitating the transfer of surgical knowledge. This study presents a benchmark for comparing AR-based surgical telementoring systems, examining the network performances across different surgery types, mentor-mentee locations, and underlying networking protocols.
2022 IEEE 22ND INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOENGINEERING (BIBE 2022)
(2022)
Proceedings Paper
Engineering, Biomedical
Mai Trinh, Nikhil V. Navkar, Zhigang Deng
Summary: This work presents a practical augmented reality surgical navigation system using optical see-through head-mounted display as a standalone solution, without the need for additional tracking hardware. It proposes a fiducial marker-based instrument tracking method that relies solely on the built-in hardware of the Microsoft HoloLens 2. The system achieves high tracking and alignment accuracy, as demonstrated in experimental evaluation.
2022 IEEE 22ND INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOENGINEERING (BIBE 2022)
(2022)
Proceedings Paper
Medicine, Research & Experimental
Mai Trinh, Jhasketan Padhan, Nikhil Navkar, Zhigang Deng
Summary: In this study, we proposed an interfacing mechanism for manipulating virtual surgical instruments, which computes the pose of the interface from real-time video feed and provides accurate pose estimation. The mechanism is easy to integrate and cost-effective, making it particularly suitable for remote surgical tele-mentoring applications.
2022 INTERNATIONAL SYMPOSIUM ON MEDICAL ROBOTICS (ISMR)
(2022)
Article
Computer Science, Cybernetics
Aobo Jin, Qixin Deng, Zhigang Deng
Summary: This article presents a live speech-driven, avatar-mediated, three-party telepresence system that allows three distant users to interact in a shared 3D virtual world. The system generates conversational motions for avatars based on live speech input and utilizes a cloud server for motion and speech transmission and synchronization. A user study demonstrates that this system offers a better telepresence user experience compared to other widely-used methods.
PRESENCE-VIRTUAL AND AUGMENTED REALITY
(2022)