Article
Chemistry, Multidisciplinary
Si-Ming Wu, Yi-Tian Wang, Shi-Tian Xiao, Yan-Xiang Zhang, Ge Tian, Jiang-Bo Chen, Xiao-Fang Zhao, Christoph Janiak, Menny Shalom, Detlef W. Bahnemann, Li-Ying Wang, Xiao-Yu Yang
Summary: Directed transfer of carriers in semiconductors by structural design is challenging but important. In this study, TiO2 nanosheets with interlayered sp(2) carbon and titanium vacancies were obtained, and the directed transfer of carriers from the excited position to Ti-vacancies to interlayered carbon was observed. This greatly increased the charge transport efficiency and resulted in excellent photocatalytic and photoelectrochemical activity, as well as significant lithium/sodium ion storage performance. Theoretical calculations further revealed the mechanism of spatial inside-out cascade electron transfer.
Article
Engineering, Environmental
Junhao Lin, Shichang Sun, Donghua Xu, Chongwei Cui, Rui Ma, Juan Luo, Lin Fang, Haowen Li
Summary: This study optimized process parameters to improve the utilization efficiency of microwave energy and the specific surface area of biochar. It revealed the role of hotspots in promoting the evolution of biochar structure.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Zhundong Li, Fengming Hu, Zhiming Chen, Jingcheng Huang, Guoning Chen, Runbo Chen, Minmin Wei, Kete Lao, Jiajia Hu, Jintao Zheng, Lvfei Wang, Yuan Yao, Xiaoyan Hu, Baowen Liang, Min Yang, Xihong Lu, Jinxiu Wen, Jianyi Luo
Summary: This article introduces a method and principle of manufacturing directional bending sensors using fiber-junction structure models, which allows for measurement of bending angle and recognition of direction through a theoretical expression. This method is simple and practical, with directional recognition capability.
NPJ FLEXIBLE ELECTRONICS
(2021)
Article
Geochemistry & Geophysics
E. Tema, I Hedley, F. J. Pavon-Carrasco, E. Ferrara, P. Gaber, D. Pilides, M. Toumazou, Y. Violaris, J. Webb, D. Frankel
Summary: A study utilizing new directional archaeomagnetic data from Cyprus and nearby countries calculated the first directional palaeosecular variation curve for the Middle East, revealing periods of abrupt directional changes and confirming the characteristics of the geomagnetic field during the Levantine Iron Age Anomaly. Further investigation is warranted for other periods of significant curvature changes.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Engineering, Environmental
Antonysamy Jeyaseelan, Ayman A. Ghfar, Mu Naushad, Natrayasamy Viswanathan
Summary: The study developed amine functionalized graphene oxide (AGO) with high defluoridation capacity for fluoride removal. Through optimization of parameters and investigation of adsorption isotherms, kinetics and thermodynamics, the fluoride removal mechanism of AGO was found to be electrostatic attraction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Danyang Wu, Shenfei Pei, Feiping Nie, Rong Wang, Xuelong Li
Summary: This paper proposes a novel Multi-Directional Multi-Label Learning (MDML) model, which captures the relationships between multiple labels using discriminative classifiers and low-rank constraints. Experimental results demonstrate the superiority of this model on popular benchmark datasets.
Review
Materials Science, Multidisciplinary
Chao Yang, Ian Baker
Summary: Directional recrystallisation processing is a solid-state process that aims to achieve columnar grain structures or single crystals to enhance mechanical properties. The resulting microstructures are influenced by processing parameters like temperature gradient, hot-zone velocity, and annealing temperature, as well as microstructural parameters like stored energy, grain size, initial texture, solutes, and both soluble and insoluble particles.
INTERNATIONAL MATERIALS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Xiaopeng Yuan, Yulin Hu, Anke Schmeink
Summary: This study investigates a UAV-enabled wireless power transfer network with multiple ground sensor nodes. It considers a non-linear energy harvesting model and a directional antenna structure with analog directional beamforming. By jointly optimizing the UAV trajectory and the orientation of the directional antenna, the objective is to maximize the minimum harvested energy among all sensor nodes during a fixed time period, while addressing fairness concerns.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Eva G. Noya, Chak Kui Wong, Pablo Llombart, Jonathan P. K. Doye
Summary: The study introduces a class of IQCs built from model patchy colloids, which could be realized experimentally using DNA origami particles. The rational design strategy leads to systems that robustly assemble into target IQCs through directional bonding.
Article
Computer Science, Software Engineering
Iwan Boksebeld, Amir Vaxman
Summary: We present a framework for representing face-based directional fields of an arbitrary piecewise-polynomial order. Our formulation bypasses the difficulty of constructing high-order non-conforming function spaces, and enables the utilization of higher-order finite elements for directional-field processing. This representation preserves the structure of the fields and demonstrates benefits in various applications.
ACM TRANSACTIONS ON GRAPHICS
(2022)
Article
Engineering, Electrical & Electronic
Wenqiang Wei, Xianxiang Yu, Qinghui Lu, Xiangrong Wang, Guolong Cui
Summary: This letter proposes a novel window function design to synthesize asymmetric beampatterns while minimizing the gain loss for clutter/interference suppression as required in practical applications. It introduces an iterative alternating optimization (IAO) algorithm to tackle the resultant nonconvex optimization problem and provides numerical simulations to verify its effectiveness compared with the classical adjustable window functions (CAWFs).
IEEE SIGNAL PROCESSING LETTERS
(2023)
Article
Chemistry, Physical
Yi Zhai, Fumin Wang, Xubin Zhang, Guojun Lv, Yuzhou Wu, Tao Jiang, Qing Zhang, Mengyue Li, Mengyao Li, Yongkui Liu
Summary: The study successfully synthesized hollow Fe-silicate-1 with higher yield using mother liquid, proposing a formation mechanism with rich inner defects and TPAOH playing crucial roles.
Article
Acoustics
Samuel D. Bellows, Dallin T. Harwood, Kent L. Gee, Micah R. Shepherd
Summary: This study presents high-resolution directivity measurements of Balinese gamelan gongs and reveals that their structural modes impact the directivity patterns in the sound field, while the directivity indices are correlated with the frequencies.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Chemistry, Physical
Hong-Baek Cho, Masanao Kanno, Minseob Lim, Tadachika Nakayama, Yong-Ho Choa
Summary: This study introduces a method to regulate the distribution of inorganic fillers in composite film using an electric field-oriented pin-point localization technique, achieving linear assembly and perpendicular alignment of nano particles. The utilization of micromold electrodes and DC electric field enables controlled filler structure modulation without surface modification.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Mohammad Taj, G. N. V. R. Vikram
Summary: This paper proposes a high sensitive linear and rotational based differential capacitive inertial sensor. The sensor consists of a proof of mass that measures acceleration and displacement change using differential capacitance. The sensor is modeled and simulated using CoventorWare software, and the SOIMUMPS fabrication process is described. Solid mechanics and electrostatic analysis are applied to measure acceleration, and a high sensitivity of 981.28fF/g is observed. The paper concludes with a discussion on the performance and future scope of the inertial sensor.
IEEE SENSORS JOURNAL
(2022)
Article
Computer Science, Software Engineering
Manish Mandad, Marcel Campen
Summary: The algorithm introduces a high-quality mesh generation method for curvilinear triangulation of planar domains, ensuring the resulting triangular elements meet strict quality measures and bounds, with implications for finite element analysis applications. The boundary of the domain is replicated exactly without geometric approximation errors, achieving reliable results through careful geometric transformations and observations of convergence properties.
ACM TRANSACTIONS ON GRAPHICS
(2021)
Article
Computer Science, Software Engineering
M. Lyon, M. Campen, L. Kobbelt
Summary: The algorithm utilizes a two-stage method for generating quad layouts, involving positioning vertices and connecting them to form layout edges before partitioning the surface into quadrilateral patches. It allows adjustments to the initial layout vertices in the second stage to improve layout quality.
COMPUTER GRAPHICS FORUM
(2021)
Article
Computer Science, Software Engineering
J. Born, P. Schmidt, M. Campen, L. Kobbelt
Summary: The study presents a method for inferring topological information from imperfect input maps, computing homology maps to reliably handle imperfect input, and ensuring compatibility with true homeomorphisms.
COMPUTER GRAPHICS FORUM
(2021)
Article
Computer Science, Software Engineering
Manish Mandad, Ruizhi Chen, David Bommes, Marcel Campen
Summary: Polycube mapping is an approach for generating all-hexahedral meshes with a regular interior. Finding an appropriate polycube domain is challenging, but our novel method solves this problem by solving a series of convex problems, avoiding undesired corners and surface irregularities common to previous methods.
COMPUTER AIDED GEOMETRIC DESIGN
(2022)
Article
Computer Science, Software Engineering
Hendrik Brueckler, Ojaswi Gupta, Manish Mandad, Marcel Campen
Summary: The motorcycle graph, widely used in 2D shape and surface decomposition, has been extended to the three-dimensional volumetric setting, ensuring important decomposition properties. Algorithms are proposed for constructing the 3D motorcycle complex, applied in examples of hexahedral mesh generation and volumetric T-spline construction.
COMPUTER GRAPHICS FORUM
(2022)
Article
Computer Science, Software Engineering
Nico Pietroni, Marcel Campen, Alla Sheffer, Gianmarco Cherchi, David Bommes, Xifeng Gao, Riccardo Scateni, Franck Ledoux, Jean Remacle, Marco Livesu
Summary: In this article, a comprehensive survey of hexahedral mesh generation techniques is provided, covering various approaches, post-processing algorithms, and associated challenges. The discussion also includes recent relaxed approaches for hex-dominant mesh generation. The required background knowledge in geometry and combinatorial aspects is introduced.
ACM TRANSACTIONS ON GRAPHICS
(2023)
Article
Computer Science, Software Engineering
P. Khanteimouri, M. Mandad, M. Campen
Summary: This article presents a reliable method for generating planar meshes of nonlinear rational triangular elements, ensuring their validity and accuracy. The method generalizes existing techniques to handle more complex cases. Experimental results demonstrate the feasibility of this method.
COMPUTER GRAPHICS FORUM
(2022)
Article
Computer Science, Software Engineering
P. Schmidt, J. Born, D. Bommes, M. Campen, L. Kobbelt
Summary: Non-linear optimization is crucial in geometry processing research, but deriving derivatives manually is time-consuming and error-prone. TinyAD, a lightweight C++ library, provides automatic differentiation for geometric problems, making it easier to explore non-linear optimization techniques.
COMPUTER GRAPHICS FORUM
(2022)
Article
Computer Science, Software Engineering
P-A Beaufort, M. Reberol, D. Kalmykov, H. Liu, F. Ledoux, D. Bommes
Summary: HexMe is a dataset consisting of 189 tetrahedral meshes with tagged features and a workflow for their generation. It aims to enable consistent and meaningful evaluation of hexahedral meshing algorithms and techniques, specifically regarding the correct meshing of specified feature points, curves, and surfaces. The meshes are generated with Gmsh from 63 CAD models classified into simple, nasty, and industrial categories. Three types of tetrahedral meshes (uniform, curvature-adapted, and box-embedded) are provided for each CAD model. The mesh generation pipeline is defined using Snakemake, allowing for a fully automated and extensible workflow. The dataset can be downloaded or individual meshes can be selected from the online catalog. HexMe is designed for future developments and hosted on a public GitHub repository for potential contributions and future releases. The value of HexMe is demonstrated by exploring the limitations of a state-of-the-art hexahedral meshing algorithm based on frame fields, achieving varying success rates for meshing feature points, curves, and surfaces.
COMPUTER GRAPHICS FORUM
(2022)
Article
Computer Science, Software Engineering
Maxence Reberol, Kilian Verhetsel, Francois Henrotte, David Bommes, Jean-Francois Remacle
Summary: We propose a robust technique for constructing a topologically optimal all-hexahedral layer on complex model boundaries. The generated boundary layer mesh accurately respects the input surface mesh geometry and optimizes the hexahedral valences of boundary edges. Our approach formulates an integer programming problem based on the duality between boundary hexahedral configurations and disk triangulations. Global optimization is achieved by solving a series of sub-problems using combinatorial branch-and-bound searches. The resulting mesh topology and geometry are automatically generated and fast.
ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE
(2023)
Article
Computer Science, Software Engineering
Martin Heistermann, Jethro Warnett, David Bommes
Summary: Subdividing non-conforming T-mesh layouts into conforming quadrangular meshes is a key task in meshing methods. This paper introduces the Bi-MDF problem and presents an exact solver and an approximate solver for efficiently solving various T-Mesh quantization problems. The exact solver shows significant improvements in runtime and energy compared to the state-of-the-art QuadWild implementation.
ACM TRANSACTIONS ON GRAPHICS
(2023)
Article
Computer Science, Software Engineering
Valentin Z. Nigolian, Marcel Campen, David Bommes
Summary: This paper provides a new framework for volumetric mapping by introducing the concept of progressive expansion. A prototype algorithm is presented for mapping from ball-topology tetrahedral meshes to convex or star-shaped domains, showing improvement in terms of map bijectivity. The framework has the potential to inspire more efficient methods in the future.
ACM TRANSACTIONS ON GRAPHICS
(2023)
Article
Computer Science, Software Engineering
Heng Liu, David Bommes
Summary: This article investigates the topology of frame fields and derives conditions on their meshability, proposing a novel algorithm to automatically convert non-meshable frame fields into locally meshable ones. Compared to state-of-the-art methods, our algorithm increases the success rate of generating valid integer-grid maps from 2% to 58% on the challenging HexMe dataset.
ACM TRANSACTIONS ON GRAPHICS
(2023)