Article
Biochemistry & Molecular Biology
Honey Jain, Konstantina Karathanou, Ana-Nicoleta Bondar
Summary: Phosphatidylserine lipids, anionic molecules found in eukaryotic plasma membranes, play essential roles in cellular physiology. Understanding the altered distribution of phosphatidylserine, particularly in apoptotic cancer cells, has important implications for biomarker development. This study utilizes a graph algorithm to study the dynamics of water-mediated lipid clusters at the interface of a model bilayer, providing insights into the behavior of phosphatidylserine in the presence of cholesterol.
Article
Materials Science, Multidisciplinary
Maria A. Kniazeva, Alexander E. Ganzha, Ran Gao, Arvind Dasgupta, Alexey Filimonov, Roman G. Burkovsky
Summary: This paper investigates the temperature-induced phase transitions and domain structure characteristics of epitaxial PbZrO3/SrRuO3/SrTiO3 heterostructures using high-resolution synchrotron x-ray diffraction. The transition order of the antiferroelectric transition changes from first to second; peculiar in-plane M-point superstructures appear at high temperatures, indicating a new phase; the R- and E-point superstructure reflections show reduced splitting compared to mechanical compatibility demands. The study discusses the energetics of reduced antiferroelectric domain tilts, its connection to observed phase transition changes, and the possible contribution of an unusual diffraction mechanism related to partial coherence between domains in a random nanodomain structure.
Article
Automation & Control Systems
Lu Zhao, Yan Wan, Chenyuan He, Frank L. Lewis
Summary: This article investigates the identifiability and estimation problems of the reduced-order stochastic network model (IM), and provides succinct conditions for both homogeneous and heterogeneous IMs. It also develops reduced-order parameter estimation algorithms for the IMs with reduced computation.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2023)
Article
Automation & Control Systems
Qiang Song, Guoping Lu, Guanghui Wen, Yu Zhao, Fang Liu
Summary: This article investigates the problems of structural balance and distributed control for a high-order signed network with generic linear dynamics. A novel approach is proposed to analyze the structural balance of a general network, and algorithms are developed for distributed control. The theoretical results are illustrated by numerical examples.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Zhan Xiong, Zhi-Kang Lin, Hai-Xiao Wang, Shiyang Liu, Yixian Qian, Jian-Hua Jiang
Summary: This study proposes valley higher-order Weyl semimetal phases in honeycomb lattices and discusses their potential realization in sonic crystals and other systems. These materials exhibit rich topological modes localized at multidimensional boundaries, offering possibilities for topological manipulation of wave propagation and potential applications.
Article
Computer Science, Interdisciplinary Applications
Ren Kai Tan, Chao Qian, Kangjie Li, Dan Xu, Wenjing Ye
Summary: Topology optimization is a systematic approach for obtaining optimal performance in structural design, but it can be computationally expensive and deep learning models lack generalizability. This work proposes an adaptive, scalable deep learning-based model-order-reduction method using MapNet to accelerate large-scale topology optimization. The method allows simulations to be performed at a coarser mesh, reducing computational time, and introduces domain fragmentation to improve the method's transferability and scalability.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Mathematics, Applied
Yi Zheng, Xiaoqun Wu, Ziye Fan, Wei Wang
Summary: This article aims to identify the topology and system parameter of fractional-order complex dynamical networks. The unknown topology and system parameter of the drive network are successfully identified under several controllers and update strategies. The high heterogeneity between the nodes of the drive network facilitates identification, as concluded by two numerical simulations.
APPLIED MATHEMATICS AND COMPUTATION
(2022)
Article
Automation & Control Systems
Mingjun Du, Deyuan Meng, Kaiquan Cai, Qiang Song
Summary: This article focuses on exploring a class of Lyapunov analysis approaches to deal with convergence problems on second-order signed networks (SOSNs) under arbitrary strongly connected directed topologies. A new class of Laplacian potentials is proposed for SOSNs by exploiting the properties of Laplacian matrices. The relation between the convergence behaviors of all agents and those of Laplacian potentials is disclosed, allowing for the solution of convergence issues in SOSNs using the Lyapunov stability theory even when the weight-balanced condition is not satisfied. Additionally, the proposed Laplacian potential can be leveraged to address the convergence problems of distributed averaging for SOSNs.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2023)
Article
Materials Science, Ceramics
Pan Gao, Chang Liu, Zenghui Liu, Hongyan Wan, Yi Yuan, Haijuan Li, Yongping Pu, Zuo-Guang Ye
Summary: A new binary AFE solid solution of (1-x)PbZrO3-xPb(Mg1/2Mo1/2)O-3 (PZ-PMM) was synthesized successfully in the form of ceramics. The crystal structure, phase transition behavior, and electrical properties of the PbZrO3 ceramics were investigated after chemical modification with Pb(Mg1/2Mo1/2)O-3. It was found that an orthorhombic Pbam perovskite phase and a broadened ferroelectric intermediate phase existed in the PZ-PMM solid solution, and the maximum electric field-induced polarization increased while the critical field decreased with increasing PMM content.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Physics, Multidisciplinary
Qianyi Chen, Wenyuan Shi, Dongyan Sui, Siyang Leng
Summary: This work designs a new non-Bayesian social learning strategy called hypergraph social learning, which introduces higher-order topology as the underlying communication network structure and theoretically analyzes its convergence and convergence rate. Extensive numerical examples demonstrate the effectiveness and superior performance of the framework in tasks such as cooperative positioning. The designed framework can assist sensor network designers in developing more efficient communication topology that can better resist environmental obstructions and has theoretical and applied values in various areas.
Correction
Engineering, Electrical & Electronic
Tianjiao Wang, Xinyu Wang, Zengfu Wang, Chao Guo, Bill Moran, Moshe Zukerman
Summary: This article presents corrections and revisions to the paper "Optimal Tree Topology for a Submarine Cable Network With Constrained Internodal Latency".
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Computer Science, Cybernetics
Zhen Wang, Ruodan Li, Xing Jin, Hong Ding
Summary: In an autonomous system, rational agents gradually give up cooperation and only pursue their own benefits, resulting in the phenomenon of free-riding. Social norms promote cooperation by punishing deviation. However, the traditional pairwise interaction network is inadequate to reflect the interaction properties of cooperative events. Thus, hypergraphs are introduced to model metanorm games more effectively.
IEEE TRANSACTIONS ON COMPUTATIONAL SOCIAL SYSTEMS
(2023)
Article
Multidisciplinary Sciences
Xi Chen, Vikina Martinez, Eva Korblova, Guillaume Freychet, Mikhail Zhernenkov, Matthew A. Glaser, Cheng Wang, Chenhui Zhu, Leo Radzihovsky, Joseph E. Maclennan, David M. Walba, Noel A. Clark
Summary: This study structurally characterized an intermediate phase of liquid crystal, revealing an antiferroelectric smectic phase that fills a gap in the classification of liquid crystals. The key features of the phase sequence were described using a Landau free energy.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Multidisciplinary
Ru-Jian Jiang, Yi Cao, Wan-Rong Geng, Mei-Xiong Zhu, Yun-Long Tang, Yin-Lian Zhu, Yujia Wang, Fenghui Gong, Su-Zhen Liu, Yu-Ting Chen, Jiaqi Liu, Nan Liu, Jing-Hui Wang, Xiao-Dong Lv, Shuang-Jie Chen, Xiu-Liang Ma
Summary: Based on atomic-resolution transmission electron microscopy, the phase transition pathway and lattice details in lead zirconate thin films were elucidated. A new type of ferrielectric-like dipole configuration was discovered as a precursor for the antiferroelectric to ferroelectric transformation. The phase transition pathways driven by the phase boundary were revealed. This study provides new insights into the consecutive phase transformation in low-dimensional lead zirconate and promotes the development of potential antiferroelectric-based multifunctional devices.
Article
Polymer Science
Ziyu Xing, Zhenghong Li, Haibao Lu, Yong Qing Fu
Summary: In this study, an extended Maxwell model is proposed to describe the coupling of intra-chain ionic bonds and inter-chain hydrogen bonds in physical hydrogels during self-assembly and mechanical toughening. The model is effective in explaining the mechanical robustness of physical hydrogels by analyzing the topology and stress-strain relationship. The proposed model is verified using molecular dynamic simulations and experimental results, confirming its validity in predicting the behavior of physical hydrogels.
Article
Multidisciplinary Sciences
Lingmei Kong, Jialong Wu, Yunguo Li, Fan Cao, Feijiu Wang, Qianqian Wu, Piaoyang Shen, Chengxi Zhang, Yun Luo, Lin Wang, Lyudmila Turyanska, Xingwei Ding, Jianhua Zhang, Yongbiao Zhao, Xuyong Yang
Summary: This study reports highly efficient QLEFETs with an external quantum efficiency (EQE) of over 20% by employing a dielectric-QDs-dielectric (DQD) sandwich structure. The DQD structure controls carrier behavior and shifts the exciton recombination zone into the emissive layer, resulting in enhanced radiative recombination and preventing exciton loss and luminescence quenching.
Article
Computer Science, Interdisciplinary Applications
Yunguo Li, Lidunka Vocadlo, John P. Brodholt
Summary: A toolkit that simplifies the calculation of solid-state elastic properties at finite temperatures has been developed. The stress-strain method has been improved and automated, allowing for more efficient and cost-effective calculations. The results demonstrate the robustness and effectiveness of this method.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
D. Huang, J. Brodholt, P. Sossi, Y. Li, M. Murakami
Summary: This study investigates the speciation of nitrogen in anhydrous and hydrous pyrolitic melts under varying pressure, temperature, and redox conditions. It is found that under oxidizing conditions, nitrogen forms N-N bonding at lower mantle pressures, while under reducing conditions, it interacts with the silicate network or forms N-H bonds. The redox control of nitrogen speciation is demonstrated to be valid over a range of pressure-temperature conditions, potentially influencing the composition of secondary atmospheres on Earth.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Zhengqing Liu, Kunkun Nie, Xiaoyan Qu, Xinghua Li, Binjie Li, Yanling Yuan, Shaokun Chong, Pei Liu, Yunguo Li, Zongyou Yin, Wei Huang
Summary: Phase engineering of nanomaterials provides a promising way to explore the phase-dependent physicochemical properties and various applications of nanomaterials. In this study, a general scalable colloidal synthesis method was reported for the preparation of nanosized 1T'-TMD monolayers with high phase purity. The growth mechanism of 1T'-TMD nano-monolayers was uncovered through experiments and calculations. Additionally, the application of 1T'-TMD nano-monolayers for electrocatalytic hydrogen production was demonstrated.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nuclear Science & Technology
Xiaoyong Yang, Pavel A. Korzhavyi, Yang Liu, Qianglin Wei, Temirlan R. Arslanov, John P. A. Waerna, Yu Yang, Ping Zhang
Summary: In this study, the properties of U3Si, U3Si2, and USi compounds were systematically investigated, and the reaction energies between them were calculated. The results showed that under appropriate conditions, the formation of USi is more likely to occur, while high temperature and sufficient uranium environment are more favorable for the formation of U3Si.
PROGRESS IN NUCLEAR ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Claudio M. Lousada, Pavel A. Korzhavyi
Summary: The occurrence and distribution of vacancies have significant implications on the properties of materials. This study investigates the preference of single vacancy site at different grain boundaries of fcc Cu and reveals the differences in symmetry changes and vacancy stability among these boundaries.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
A. Yu. Stroev, O. I. Gorbatov, Yu. N. Gornostyrev, P. A. Korzhavyi
Summary: In this study, the growth of precipitates during solid solution decomposition and the dissolution of small precipitates during the coarsening stage in ternary Al-Sc-Zr alloys were investigated using a statistical alloy theory based on the Master Equation approach with ab initio calculated interatomic interactions. The results showed that Zr alloying promoted the formation of core-shell nanoparticles in Al-Sc alloys, whose structure was highly sensitive to the solute diffusion rates. It was demonstrated that the core-shell structure of precipitates slowed down the dissolution of small particles, thus hindering microstructure coarsening at elevated temperatures.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Marcela E. Trybula, Arkadiusz Zydek, Pavel A. Korzhavyi, Joanna Wojewoda-Budka
Summary: Aluminum oxide coating is resistant to weak acidic and alkaline aqueous solutions and naturally forms a passivation layer against corrosion. Molecular dynamics simulations were used to study the behavior of the Al/oxide surface when exposed to strong corrosive media. The mechanism of film growth on the Al/oxide surface during corrosion differs in alkaline and acidic solutions, leading to differences in structure and topography. The chemical composition of the formed films is pH-independent, and the films have a topologically complex amorphous nature.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Claudio M. Lousada, Pavel A. Korzhavyi
Summary: Investigation on the interactions between H-atoms and common grain boundaries in Al reveals that single H-atoms can cause displacement of Al-atoms and can favor segregation when other nearby H-atoms are bound. These grain boundaries can accommodate high concentrations of H-atoms with considerable segregation energies per atom, due to their higher symmetry, larger volumes, and higher coordination numbers compared to bulk sites. The uniform distribution of H-atoms at grain boundaries suggests that mitigating hydrogen uptake solely by controlling certain grain boundaries may not be the most efficient strategy for Al.
SCIENTIFIC REPORTS
(2022)
Article
Computer Science, Interdisciplinary Applications
Yunguo Li, Huaiwei Ni
Summary: The accurate determination of self-diffusion coefficient from molecular dynamics simulations using the Einstein relation is hindered by finite system size. Our Python module facilitates the accurate determination of self-diffusion coefficient by fitting the Einstein relation and excluding the ballistic stage. We also provide a method to calculate viscosity that corrects for the finite system size.
COMPUTER PHYSICS COMMUNICATIONS
(2023)
Article
Geosciences, Multidisciplinary
D. Huang, Y. Li, A. Khan, P. Sossi, D. Giardini, M. Murakami
Summary: Seismic measurements on Mars reveal that the liquid core is rich in light elements, but the effect of these elements on core elasticity is not well understood. Through molecular dynamics simulations, we calculate the elastic properties of different liquid Fe-X (X = Ni, S, C, O, and H) mixtures. Our findings show that the addition of S and O significantly decreases the density of liquid iron in the Martian core, while Ni has minimal effect. Additionally, C increases the compressional sound velocity throughout the core, while both S and O decrease it with diminishing intensity at higher pressures. Assuming a binary mixture for the Martian core, the seismic density measurements suggest the presence of at least 30 wt% S.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yi Yang, Pavel A. Korzhavyi, Pavel A. Nikolaychuk, Elena F. Bazarkina, Kristina O. Kvashnina, Sergei M. Butorin, Nadezda V. Tarakina, Inna L. Soroka
Summary: Transition metal-based catalysts have the potential to replace Pt-based materials in energy conversion devices due to their low cost, reasonable activity, stability, and corrosion resistance. This study demonstrates the synthesis of homogeneous alloy nanoparticles with controlled structure and varying Ni-to-Co ratios using a gamma-radiolytic reduction method. The presence of structural defects in the obtained samples influenced the catalysts' activity towards the oxygen evolution reaction but had a less pronounced effect on the oxygen reduction reaction. The activity of Ni-Co catalysts in the hydrogen evolution reaction was found to be affected by the formation of Ni-OH bonds on the surface.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Crystallography
Marcela E. Trybula, Arkadiusz Zydek, Pavel A. Korzhvayi, Joanna Wojewoda-Budka
Summary: Oxidation conditions can be controlled to tailor the properties and structure of oxide films. Molecular dynamics simulations were used to study the thermal oxidation of polycrystalline Al substrates. The results showed that the density of O2 and the temperature had an impact on the formation of oxide films, which exhibited long-range order and a two-phase structure. Additionally, the roughness of the Al surface before oxidation affected the behavior of the metal/oxide interface and the structure of the oxide film.
Article
Geosciences, Multidisciplinary
Hua Yang, Peixue Dou, Tingting Xiao, Yunguo Li, Joshua M. R. Muir, Feiwu Zhang
Summary: Under inner core conditions, FeHx tends to have a hexagonal close-packed (hcp) structure due to low hydrogen concentration and elevated temperature. Lattice hydrogen hardens the wave velocities of iron while superionic hydrogen softens it. Both fcc-FeH and hcp-FeH can match inner-core wave velocities and Poisson's ratio, supporting the hypothesis of hydrogen as a vital light element in the Earth's core.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Deju Zhang, Xinyi Chen, Peng Jiang, Yunguo Li, Xiaohong Zheng, Zhen Liu, Maosheng Miao, Hong-Mei Huang, Yan-Ling Li
Summary: By compressing the vdW material LiP15, a novel C2/m structure with superconductivity is discovered, which undergoes a one- to quasi-two-dimensional crossover and a semiconducting to superconducting electronic transition under pressure. The transition temperature of the superconducting state in the C2/m structure increases with pressure, reaching 14.2 K at 15 GPa. Additionally, a stable phosphorus allotrope is obtained by removing lithium atoms in the C2/m structure, with energy comparable to black phosphorus at ambient pressure. These findings open up new possibilities for designing vdW materials with pressure-induced dimensional crossover and searching for vdW superconductors in similar systems.