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arXiv 2021年

作者： Miao, Yuhu Fu, Libo Du, Xian Yuan, Ding Jiang, Chaowei Su, Jiangtao Zhao, Mingyu Anfinogentov, Sergey Institute of Space Science and Applied Technology Harbin Institute of Technology Shenzhen Guangdong518055 China CAS Key Laboratory of Solar Activity National Astronomical Observatories Beijing100012 China College of Creative Design Shenzhen Technology University Guangdong518118 China School of Astronomy and Space Sciences University of Chinese Academy of Sciences 19 A Yuquan Road Shijingshan District Beijing100049 China Yunnan Observatories Chinese Academy of Sciences Kunming650011 China Institute of Solar-Terrestrial Physics Irkutsk664033 Russia

A light bridge is a magnetic intrusion into a sunspot, it interacts with the main magnetic field and excites a variety of dynamical processes. In the letter, we studied magnetic connectivity between a light bridge and coronal loops rooted at the sunspot. We used the data of the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory (SDO) to study the features of sunspots with light bridges. It is found that if a light bridge anchors at the umbra-penumbra boundary, the coronal loops could not be formed around the anchoring point. If the a light bridge become detached from the penumbra, the coronal loop starts to form again. The vector magnetogram provided by the Helioseismic Magnetic Imager onboard SDO shows that the anchoring region of a light bridge usually have an accompanying opposite minor-polarities. We conjugate that the magnetic field line could connect to these opposite polarities and form short-range magnetic loops, and therefore, coronal loops that extend to long-range could not be formed. A model of light bridge is proposed to explain the magnetic connectivity between a light bridge and the coronal loops. This model could explain many physical processes associated with light bridges. Copyright © 2021, The Authors. All rights reserved.

关键词： Magnetohydrodynamics

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Haplotype-resolved genome assembly and allele- specific gene expression in cultivated ginger

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Horticulture Research 2021年第1期8卷 2531-2545页

作者： Shi-Ping Cheng Kai-Hua Jia Hui Liu Ren-Gang Zhang Zhi-Chao Li Shan-Shan Zhou Tian-Le Shi Ai-Chu Ma Cong-Wen Yu Chan Gao Guang-Lei Cao Wei Zhao Shuai Nie Jing-Fang Guo Si-Qian Jiao Xue-Chan Tian Xue-Mei Yan Yu-Tao Bao Quan-Zheng Yun Xin-Zhu Wang Ilga Porth Yousry AEl-Kassaby Xiao-Ru Wang Zhen Li Yves Van de Peer Jian-Feng Mao Pingdingshan University Henan Province Key Laboratory of Germplasm Innovation and Utilization of Eco-economic Woody PlantPingdingshan 467000 HenanChina Beijing Advanced Innovation Center for Tree Breeding by Molecular Design National Engineering Laboratory for Tree BreedingKey Laboratory of Genetics and Breeding in Forest Trees and Ornamental PlantsMinistry of EducationCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijing 100083China Ori(Shandong)Gene Science and Technology Co. LtdWeifang 261000 ShandongChina Pingdingshan Academy of Agricultural Sciences Pingdingshan 467000 HenanChina Department of Ecology and Environmental Science UPSCUmea UniversityUmeaSweden Departement des Sciences du Bois et de la Foret Facultede Foresteriede Geographie et GéomatiqueUniversite Laval QuebecQuebecQC G1V 0A6Canada Department of Forest and Conservation Sciences Faculty of ForestryUniversity of British ColumbiaVancouverBC V6T 1Z4Canada Department of Plant Biotechnology and Bioinformatics Ghent UniversityGhentBelgium VIB Center for Plant Systems Biology 9052 GhentBelgium Centre for Microbial Ecology and Genomics Department of BiochemistryGenetics and Microbiology GeneticsUniversity of PretoriaPrivate Bag X20Pretoria 0028South Africa College of Horticulture Academy for Advanced Interdisciplinary StudiesNanjing Agricultural UniversityNanjing 210095China

Ginger(Zingiber officinale)is one of the most valued spice plants worldwide;it is prized for its culinary and folk medicinal applications and is therefore of high economic and cultural ***,we present a haplotype-resolved,chromosome-scale assembly for diploid ginger anchored to 11 pseudochromosome pairs with a total length of 3.1 *** structural variation was identified between haplotypes,and two inversions larger than 15Mb on chromosome 4 may be associated with ginger *** performed a comprehensive,spatiotemporal,genome-wide analysis of allelic expression patterns,revealing that most alleles are coordinately *** alleles that exhibited the largest differences in expression showed closer proximity to transposable elements,greater coding sequence divergence,more relaxed selection pressure,and more transcription factor binding site *** also predicted the transcription factors potentially regulating 6-gingerol *** allele-aware assembly provides a powerful platform for future functional genomics,molecular breeding,and genome editing in ginger.

关键词： resolved closer breeding

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Multidimensional sound propagation in 3D high-order topological sonic insulator

arXiv

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arXiv 2020年

作者： Meng, Fei Chen, Yafeng Li, Weibai Jia, Baohua Huang, Xiaodong Faculty of Science Engineering and Technology Swinburne University of Technology HawthornVIC3122 Australia State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan430071 China Key Laboratory of Advanced Technology for Vehicle Body Design & Manufacture Hunan University Changsha410082 China

High-order topological insulators (TIs) develop the conventional bulk-boundary correspondence theory and rise the interest in searching innovative topological materials. To realize a high-order TI with a wide passband of 1D and 2D transportation modes, we design non-trivial and trivial 3D sonic crystals whose combination mimics the Su-Schrieffer-Heeger model. The high-order topological boundary states can be found at the interfaces, including 0D corner state, 1D hinge state, and 2D surface state. The fabricated sample with the bent two-dimensional and one-dimensional acoustic channels exhibits the multidimensional sound propagation in space, and also verifies the transition between the complete band gap, hinge states, and surface states within the bulk band gap. Among them, the bandwidth of the single-mode hinge state achieves a large relative bandwidth 9.1%, in which sound transports one-dimensionally without significant leak into the surfaces or the bulk. The high-order topological states in the study pave the way for multidimensional sound manipulation in space. Copyright © 2020, The Authors. All rights reserved.

关键词： Interface states

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Mechanical behavior of high-entropy alloys: A review

arXiv

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arXiv 2021年

作者： Shang, Yuanyuan Brechtl, Jamieson Psitidda, Claudio Liaw, Peter K. Department of Materials Design Institute of Hydrogen Technology Helmholtz-Zentrum Geesthacht Geesthacht21502 Germany Energy and Transportation Sciences Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Department of Materials Science and Engineering University of Tennessee KnoxvilleTN37996 United States

High-entropy alloys (HEAs) are materials that consist of equimolar or near-equimolar multiple principal components but tend to form single phases, which is a new research topic in the field of metallurgy, have attracted extensive attention in the past decade. The HEAs families contain the face-centered-cubic (fcc), body-centered-cubic (bcc), and hexagonal-close-packed (hcp)-structured HEAs. On one hand, mechanical properties, e.g. hardness, strength, ductility, fatigue, and elastic moduli, are essential for practical applications of HEAs. Scientists have explored in this direction since the advent of HEAs. On the other hand, the pursuit of high strength and good plasticity is the critical research issue of materials. Hence, strengthening of HEAs is a crucial issue. Recently, many articles are focusing on the strengthening strategies of HEAs[1-14]. In this chapter, we reviewed the recent work on the room-temperature elastic properties and mechanical behavior of HEAs, including the mechanisms behind the plastic deformation of HEAs at both low and high temperatures. Furthermore, the present work examined the strengthening strategies of HEAs, e.g. strain hardening, grain-boundary strengthening, solid-solution strengthening, and particle strengthening. The fatigue, creep, and fracture properties were briefly introduced. Lastly, the future scientific issues and challenges of HEAs were discussed. © 2021, CC BY.

关键词： Strain hardening

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Highly-stable (< 3% fluctuation) Ag-based Threshold Switch with Extreme-low OFF Current of 0.1 pA, Extreme-high Selectivity of 109 and High Endurance of 109 Cycles

Highly-stable (< 3% fluctuation) Ag-based Threshold Switch w...

引用

International Electron Devices Meeting (IEDM)

作者： Writam Banerjee Ilya V. Karpov Ashish Agrawal Seonghun Kim Seungwoo Lee Sangmin Lee Donghwa Lee Hyunsang Hwang Center for Single Atom-based Semiconductor Device Pohang University of Science and Technology (POSTECH) Pohang Republic of Korea Components Research Intel Corporation Hillsboro OR USA Computational Nano-Materials Design Laboratory Pohang University of Science and Technology (POSTECH) Pohang Republic of Korea

ISBN: (数字)9781728188881

ISBN: (纸本)9781728188898

We demonstrate driving parameters to control the hybrid-filament (HF) in Ag-based threshold switching (TS) devices. To achieve statistically improved TS behavior, we engineer the nucleation energy barrier, shape of HF and steric repulsion force during TS-operation. Finally, we demonstrate TS with extremely low OFF current (0.1 pA), extremely high selectivity (> 10 9 ) with stable threshold voltage ( 10 9 ) with stable steep subthreshold slope ~ 1 mV/dec, and high device-yield in Ag based devices.

关键词： Fluctuations Shape Force Hafnium Switches Control systems Threshold voltage

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Tensor-network-based machine learning of non-Markovian quantum processes

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Physical Review A 2020年第6期102卷 062414-062414页

作者： Chu Guo Kavan Modi Dario Poletti Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha 410081 China School of Physics and Astronomy Monash University Victoria 3800 Australia Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology Shenzhen 518055 China Science Mathematics and Technology Cluster and Engineering Product Development Pillar Singapore University of Technology and Design 8 Somapah Road Singapore 487372

We show how a tensor-network-based machine learning algorithm can learn the structures of generic, non-Markovian, quantum stochastic processes. First, a process is represented as a matrix product operator (MPO) and trained with a database of local input states at different times and the corresponding time-nonlocal output state. We then apply the algorithm to predict the output state of a process at different times for a system that is coupled to a spin-chain environment. We then reconstruct the full process, and we quantify the non-Markovian memory by means of the bond dimension of the MPO for various properties of the system, of the environment, and of their interaction. Our study paves the way for a possible experimental investigation into the process tensor and its properties, and an effective characterization of noise in quantum devices.

关键词： Learning Machine learning Quantum benchmarking Quantum control

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Characterizing disintegrated dolomite pore structure and seepage: CT scanning and numerical approach

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Journal of Rock Mechanics and Geotechnical Engineering 2024年

作者： Jiaxing Dong Peixuan Dai Wenlian Liu Hanhua Xu Sugang Sui Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming 650500 China Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co. Ltd Kunming 650051 China Key Laboratory of Geotechnical Engineering and Geological Disasters of Yunnan Province Kunming 650051 China

Disintegrated dolomite slope and tunnel disasters occur frequently due to poor water stability of disintegrated dolomite, primarily in a form of seepage failure. For engineering purposes, it is critical to determine the seepage properties of disintegrated dolomite within the strata. However, conventional experimental methods are time-consuming and expensive and may not be effective in investigating seepage characteristics due to the heterogeneity of disintegrated dolomite. In this study, pore network model (PNM) was established by the computerized tomography (CT) scanning technology to characterize the pores. Meanwhile, the seepage and coefficient of permeability under different inlet stress conditions based on the accurate pore model were realized by linking the commercial image processing software Avizo with the commercial multi-physics modeling package Comsol. The results show that the porosities of severely and completely disintegrated dolomites are 29.17% and 45.37%, respectively. The grade of pore development increases with disintegration grade, which facilitates seepage failure. Severely and completely disintegrated dolomites have the coefficients of permeability of 9.67 × 10 -7 m/s and 1.61 × 10 -6 m/s, respectively. Under conventional conditions, severely and completely disintegrated dolomites undergo seepage failure above a pressure difference of 6 × 10 3 Pa and 5 × 10 3 Pa, respectively. These results are consistent with both in situ water pressure tests in the borehole and laboratory tests with the constant-head method, demonstrating that CT scanning is an effective method for observing fractures and pores in disintegrated dolomite for seepage evaluation.

关键词： Disintegrated dolomite X-ray computerized tomography (CT) Pore network model (PNM) Seepage simulation

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Discovery of a maximally charged Weyl point

arXiv

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arXiv 2022年

作者： Chen, Qiaolu Chen, Fujia Yan, Qinghui Zhang, Li Gao, Zhen Yang, Shengyuan A. Yu, Zhi-Ming Chen, Hongsheng Zhang, Baile Yang, Yihao Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou310027 China International Joint Innovation Center Key Lab. of Advanced Micro Nano Electronic Devices & Smart Systems of Zhejiang The Electromagnetics Academy Zhejiang University Zhejiang University Haining314400 China Jinhua Institute of Zhejiang University Zhejiang University Jinhua321099 China Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen518055 China Research Laboratory for Quantum Materials Singapore University of Technology and Design 487372 Singapore School of Physics Beijing Institute of Technology Beijing100081 China Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing100081 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore Centre for Disruptive Photonic Technologies The Photonics Institute Nanyang Technological University 50 Nanyang Avenue 639798 Singapore

The hypothetical Weyl particles in high-energy physics have been discovered in three-dimensional crystals as collective quasiparticle excitations near two-fold degenerate Weyl points1-5. Such momentum-space Weyl particles carry quantized chiral charges, which can be measured by counting the number of Fermi arcs emanating from the corresponding Weyl points. It is known that merging unit-charged Weyl particles can create new ones with more charges6. However, only very recently has it been realised that there is an upper limit - the maximal charge number that a two-fold Weyl point can host is four - achievable only in crystals without spin-orbit coupling7-9. Here, we report the experimental realisation of such a maximally charged Weyl point in a three-dimensional photonic crystal. The four charges support quadruple-helicoid Fermi arcs, forming an unprecedented topology of two non-contractible loops in the surface Brillouin zone. The helicoid Fermi arcs also exhibit the long-pursued type-II van Hove singularities that can reside at arbitrary momenta. This discovery reveals a type of maximally charged Weyl particles beyond conventional topological particles in crystals. Copyright © 2022, The Authors. All rights reserved.

关键词： Topology

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Comprehensive curation and validation of genomic datasets for chestnut

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Scientific data 2025年第1期12卷 860页

作者： Jialu Fan Yu Zhang Xinghua Nie Yang Liu Shangxiao Wei Haixu Peng Hanlei Li Mingjun Zhang Lu Ning Sen Wang Ling Qin Yi Zheng Yu Xing Beijing Key Laboratory for Agriculture Application and New Technique College of Plant Science and Technology Beijing University of Agriculture Beijing 102206 China. Bioinformatics Center Beijing University of Agriculture Beijing 102206 China. Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing 102206 China. Library Beijing University of Agriculture Beijing 102206 China. Ancient Tree Health and Culture Engineering Technology Research Center National Forestry and Grassland Administration Beijing China. Beijing Key Laboratory for Agriculture Application and New Technique College of Plant Science and Technology Beijing University of Agriculture Beijing 102206 China. yz@***. Bioinformatics Center Beijing University of Agriculture Beijing 102206 China. yz@***. Ancient Tree Health and Culture Engineering Technology Research Center National Forestry and Grassland Administration Beijing China. yz@***. Beijing Key Laboratory for Agriculture Application and New Technique College of Plant Science and Technology Beijing University of Agriculture Beijing 102206 China. xingyu@***. Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing 102206 China. xingyu@***.

The Chinese chestnut (Castanea mollissima) stands out as a plant with significant ecological and economic value, excellent nutritional quality and natural resistance to pests and diseases. Recent strides in high-throughput techniques have enabled the continuous accumulation of genomic data on chestnuts, presenting a promising future for genetic research and advancing traits in this species. To facilitate the accessibility and utility of this data, we have curated and analyzed a collection of genomic datasets for eight Castanea species, including functional annotations, 213 RNA-Seq samples, and 330 resequencing samples. These datasets are publicly available on Figshare and are also available through other platforms such as GEO and EVA, providing a valuable resource for researchers studying Castanea genetics, functional genomics, and evolutionary biology. Furthermore, the datasets are integrated into the Castanea Genome Database (CGD, http://*** ), which serves as a complementary platform, offering advanced data mining and analysis tools, including BLAST, Batch Query, GO/KEGG Enrichment Analysis, and Synteny Viewer, to enhance the usability of the curated datasets.

关键词：

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Unusual Ordering Behavior of Co3al-Based Γ′ Phase with L12 Structure Predicted by the Thermodynamic Model with Support of First-Principles Calculations

SSRN

引用

SSRN 2022年

作者： Ali, Hamid Chen, Rong Chen, Hailian Zhao, Yan Zhao, Panhong Yang, Shuwen Wu, Bo Wen, Jiansen Zhang, Chubo Weng, Liangji Xie, Tianliang Cai, Qi Zhang, Longkun He, Zhihan Yao, Qipeng Zhang, Haifeng Sa, Baisheng Wen, Cuilian Lin, Maohua Liu, Yu Wang, Chunxu Multiscale Computational Materials Facility Key Laboratory of Eco-Materials Advanced Technology College of Materials Science and Engineering Fuzhou University Fuzhou350100 China Materials Design and Manufacture Simulation Facility School of Advance Manufacturing Fuzhou University Jinjiang 362200 China Department of Ocean and Mechanical Engineering Florida Atlantic University Florida Boca Raton33431 United States Central Iron & Steel Research Institute Group Beijing100081 China

The temperature and composition-dependent site preferences of the binary Co3Al, ternary, and quaternary Co3Al-based γ′ phase alloyed with Mi (Mi = Cr, Cu, Fe, Mn, Mo, Ni, Re, Ta, Ti, V, or W) were calculated for the first time using a two-sublattice thermodynamic model involving site occupying fractions (SOFs). The SOFs were calculated using a thermodynamic software package based on a thermodynamic database established in this work, where the temperature-dependent thermodynamic data were obtained using first-principles and phonon spectrum calculations. There is an obvious order-disorder transition for the stoichiometric and non-stoichiometric binary Co3Al as well as in ternary and quaternary Co3Al-based γ′ phase around the solvus temperature, while this character was not found in its counterpart Ni3Al-based γ′ phase. The additional alloying elements Mi modulate the order-disorder transition characteristics of Co3Al-based γ′-precipitate with different amplitudes. Based on the causal relationship of structure and mechanical properties, according to the modulating amplitude of the order-disorder transition behavior, we recommend that adding the additional alloying elements such as Cu, Mn, and Mo atoms make the mechanical properties degrade gradually, and thus the structural components avoid sudden damage, which is beneficial for the safety of the engine component at high operating temperature. © 2022, The Authors. All rights reserved.

关键词： Binary alloys

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