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Functional polymorphism of CYCLE underlies the diapause variation in moths

science (New York, N.Y.) 2025年第6750期388卷 eado2129页

作者： Shirui Zheng Yaohui Wang Guiyun Li Sheng Qin Zhi Dong Xu Yang Xiaomiao Xu Gangqi Fang Muwang Li Shuai Zhan State Key Laboratory of Plant Trait Design CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences Shanghai China. University of Chinese Academy of Sciences Beijing China. Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes College of Plant Protection Anhui Agricultural University Hefei China. Jiangsu Key Laboratory of Sericultural Biology and Biotechnology School of Biotechnology Jiangsu University of Science and Technology Zhenjiang China. Institute of Insect Sciences College of Agriculture and Biotechnology Zhejiang University Hangzhou China.

Diapause is a common seasonal adaptive strategy that regulates annual timing in insects. Very few causal loci underlying diapause variation have yet been identified. By leveraging cross-mapping and genome-wide association analysis, we identified the N terminus of the clock protein CYCLE as a major causal effector underlying embryonic diapause differences in the silk moth. We found that the nondiapause phenotype in polyvoltine strains results from a specific deletion that disrupts an alternative isoform of CYCLE. We further demonstrated that different CYCLE isoforms contribute to a functional diversity in modulating circadian rhythms and diapause, which has been preserved in Lepidoptera for at least 110 million years. Our study proposes a model that explains how adaptive phenotypes can evolve rapidly without affecting related essential functions.

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Effect of Kinetic Alfvén Waves on Electron Transport in an Ion-Scale Flux Rope

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Chinese Physics Letters 2018年第11期35卷 95-99页

作者： Bin-Bin Tgng Wen-Ya Li Chi Wang Lei Dai Jin-Peng Han State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190 Research and Development Center China Academy of Launch Vehicle TechnologyBeijing 100076

At the Earth＇s magnetopause, the electron transport due to kinetic Alfvén waves（KAWs） is investigated in an ion-scale flux rope by the Magnetospheric Multiscale mission. Clear electron dropout around 90° pitch angle is observed throughout the flux rope, where intense KAWs are identified. The KAWs can effectively trap electrons by the wave parallel electric field and the magnetic mirror force, allowing electrons to undergo Landau resonance and be transported into more field-aligned directions. The pitch angle range for the trapped electrons is estimated from the wave analysis, which is in good agreement with direct pitch angle measurements of the electron distributions. The newly formed beam-like electron distribution is unstable and excites whistler waves,as revealed in the observations. We suggest that KAWs could be responsible for the plasma depletion inside a flux rope by this transport process, and thus be responsible for the formation of a typical flux rope.

关键词： MMS Effect of Kinetic Alfv n Waves on Electron Transport in an Ion-Scale Flux Rope

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lMFF: Efficient and Scalable layered Materials Force Field on Heterogeneous Many-Core Processors

lMFF: Efficient and Scalable layered Materials Force Field o...

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Supercomputing Conference

作者： Ping Gao Xiaohui Duan Jiaxu Guo Jin Wang Zhenya Song Lizhen Cui Xiangxu Meng Xin Liu Wusheng Zhang Ming Ma Guohui Li Dexun Chen Haohuan Fu Wei Xue Weiguo Liu Guangwen Yang School of Software Shandong University Jinan China National Supercomputing Center in Wuxi Wuxi China Department of Computer Science and Technology Tsinghua University Beijing China College of Computer Science and Technology Jilin University Changchun China Department of Engineering Mechanics Center for Nano and Micro Mechanics Tsinghua University Beijing China Ministry of Natural Resources First Institute of Oceanography and Key Laboratory of Marine Science and Numerical Modeling Qingdao China Joint SDU-NTU Centre for Artificial Intelligence Research (C-FAIR) Jinan China Engineering Research Center of Digital Media Technology Ministry of Education Jinan China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China Department of Earth System Science Ministry of Education Key Lab for Earth System Modeling Tsinghua University Beijing China

ISBN: (数字)9781450384421

ISBN: (纸本)9781665483902

LAMMPS is one of the most popular Molecular Dynamic (MD) packages and is widely used in the field of physics, chemistry and materials simulation. Layered Materials Force Field (LMFF) is our expansion of the LAMMPS potential function based on the Tersoff potential and inter-layer potential (ILP) in LAMMPS. LMFF is designed to study layered materials such as graphene and boron hexanitride. It is universal and does not depend on any platform. We have also carried out a series of optimizations on LMFF and the optimization work is carried out on the new generation of Sunway supercomputer, called SWLMFF. Experiments show that our implementation is efficient, scalable and portable. When generic LMFF is ported to Intel Xeon Gold 6278C, $2\times$ performance improvement is achieved. For the optimized SWLMFF, the overall performance improvement is nearly $200-330\times$ compared to the original ILP and Tersoff potentials. And SWLMFF has good parallel efficiency of 95%-100% under weak scaling with 2.7 million atoms on a single process. The maximum atomic system simulated by SWLMFF is close to $2^{31}$ atoms. And nanosecond simulations in one day can be realized.

关键词： Program processors Atomic layer deposition High performance computing Force Graphene Supercomputers Optimization

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Geographic information science in the era of geospatial big data: A cyberspace perspective

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The Innovation 2022年第5期3卷 21-22页

作者： Xintao Liu Min Chen Christophe Claramunt Michael Batty Mei-Po Kwan Ahmad MSenousi Tao Cheng Josef Strobl Arzu Cöltekin John Wilson Temenoujka Bandrova Milan Konecny Paul MTorrens Fengyuan Zhang Li He Jinfeng Wang Carlo Ratti Olaf Kolditz Alexander Klippel Songnian Li Hui Lin Guonian Lu Department of Land Surveying and Geo-Informatics Hong Kong Polytechnic UniversityHong Kong SARKowloonChina Key Laboratory of Virtual Geographic Environment(Ministry of Education of PRC) Nanjing Normal UniversityNanjing 210023China The French Naval Academy Research Institute 29240 Lanveoc-PoulmicFrance The Bartlett Centre for Advanced Spatial Analysis(CASA) University College London(UCL)WC1E 6BT LondonUK Institute of Space and Earth Information Science The Chinese University of Hong KongHong Kong SARShatin 999077China Department of Civil Engineering Cairo University12613 CairoEgypt SpaceTimeLab Department of CivilEnvironmental and Geomatic EngineeringUniversity College London(UCL)WC1E 6BT LondonUK Department of Geoinformatics University of Salzburg5020 SalzburgAustria Institute of Interactive Technologies(IIT) University of Applied Sciences and Arts Northwestern Switzerland FHNW5210 WindischSwitzerland Spatial Sciences Institute University of Southern CaliforniaLos AngelesCA 90007USA Laboratory on Cartography Department of Photogrammetry and CartographyUniversity of ArchitectureCivil Engineering and Geodesy1164 SofiaBulgaria Laboratory on Geoinformatics and Cartography Department of GeographyMasaryk University61137 BrnoCeskáRepublika Computer Science and Engineering Tandon School&Center for Urban Science+ProgressNew York UniversityNew YorkNY 10012USA School of Humanities and Social Science Xi’an Jiaotong UniversityXi’an 710049China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Department of Urban Studies and Planning Massachusetts Institute of TechnologyCambridgeMA 02139USA Centre for Environmental Research Helmholtz Centre for Environmental Research-UFZ04318 LeipzigGermany Laboratory of Geo-information Science and Remote Sensing Wageningen University&ResearchWageningen 6708the Netherlands Department of Civil Engineering Toronto Metropolitan UniversityTorontoON M5B 2K3Canada School of Geography and Env

The advent of information and communication technology and the Internet of Things have led our society toward a digital *** proliferation of personal computers,smartphones,intelligent autonomous sensors,and pervasive network interactions with individuals have gradually shifted human activities from offline to online and from in person to *** transformation has brought a series of challenges in a variety of fields,such as the dilemma of placelessness,some aspects of timelessness(no time relevance),and the changing relevance of distance in the field of geographic information science(GIscience).In the last two decades,“cyber thinking”in GIscience has received significant attention from different *** instance,human activities in“cyberspace”need to be reconsidered when coupled with the geographic space to observe the first law of geography.

关键词： computer cyber instance

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Deep Learning for Password Guessing and Password Strength Evaluation, A Survey

Deep Learning for Password Guessing and Password Strength Ev...

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IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Tao Zhang Zelei Cheng Yi Qin Qiang Li Lin Shi Guangxi Key Laboratory of Cryptography and Information Security Guilin University of Electronic Technology Guilin China Guangxi Key Laboratory of Trusted Software Guilin University of Electronic Technology Guilin China Guangxi Key Laboratory of Hybrid Computation and IC Design Analysis Guangxi University for Nationalities Nanning China Department of Computer and Information Technology Purdue University West Lafayette USA PLA Information Engineering University Zhengzhou China Henan Key Laboratory of Network Cryptography Technology Zhengzhou China Cloud Computing and Big Data Research Institute China Academy of Information and Communications Technology Beijing China

ISBN: (数字)9781665403924

ISBN: (纸本)9781665403931

Text passwords are the most widely used authentication methods and will also be used in the future. Text passwords can be regarded as meaningful strings, and deep learning methods have an advantage of text processing. LSTM, RNN, GAN and other deep learning models have been using in password guessing and password strength measurements. In the paper, we make a survey on state-of-the-art deep learning methods for password guessing and password strength evaluation, including password pattern extraction, candidate password generation and password strength measurement. Compared with traditional methods, neural networks based methods can achieve better results and performance.

关键词： Deep learning Training Transfer learning Security Gallium nitride Password Text processing

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Hemispheric Distribution of Solar Active Regions During Solar Cycles 23-25

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The Astrophysical Journal Supplement Series 2025年第2期278卷 48-48页

作者： Yuxia Liu Tingting Xu Miao Wan Linhua Deng Xinhua Zhao Shiyang Qi Nanbin Xiang Weihong Zhou School of Mathematics and Computer Science Yunnan Minzu University Kunming Yunnan 650504 People’s Republic of China zwh@*** State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Beijing 100190 People’s Republic of China Radio Science and Technology Center (π Center) Chengdu Sichuan 610041 People’s Republic of China College of Science Henan Agricultural University Zhengzhou Henan 450002 People’s Republic of China Yunnan Observatories Chinese Academy of Sciences Kunming Yunnan 650216 People’s Republic of China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming Yunnan 650216 People’s Republic of China

Solar active regions (ARs) are crucial for understanding the long-term evolution of solar activities and predicting eruptive phenomena, including solar flares and coronal mass ejections. However, the cycle-dependent properties in the north-south asymmetry of ARs have not been fully understood. In this study, we investigate the hemispheric distribution of ARs from Carrington Rotation 1909 to 2278 (between 1996 May and 2023 November) by using three parameters that describe the magnetic field distribution of ARs: number, area, and flux. The main findings are as follows: (1) The three AR parameters show significant hemispheric asymmetry in cycles 23-25. The strong correlation between AR area and flux indicates that they can better reflect the intrinsic properties of solar magnetic field. (2) The correlation between sunspot activity and AR parameters varies in the two hemispheres across the different cycles. The AR parameters provide additional information for the variations in sunspot activity, which can better predict the intensity and cyclical changes of solar activity. (3) The variation in the fitting slope sign of the asymmetry index for AR parameters reflects periodic changes in hemispheric ARs, providing valuable insights into the activity of other stars. (4) Both the dominant hemisphere and the cumulative trend of AR parameters display a cycle-dependent behavior. Moreover, the trend variations of AR area and flux are similar, reflecting the long-term evolutionary characteristics of solar magnetic field. Our analysis results are relevant for understanding the hemispheric coupling of solar magnetic activity and its cyclic evolutionary patterns.

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Axion and dark photon limits from Crab Nebula high energy gamma-rays

arXiv

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arXiv 2020年

作者： Bi, Xiaojun Gao, Yu Guo, Junguang Houston, Nick Li, Tianjun Xu, Fangzhou Zhang, Xin Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China Institute of Theoretical Physics Faculty of Science Beijing University of Technology Beijing100124 China Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing100190 China Institute of Modern Physics Tsinghua University Beijing100084 China Key Laboratory of Computational Astrophysics National Astronomical Observatories Chinese Academy of Sciences Beijing100012 China School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing100049 China

The observation of cosmic sub-PeV gamma-rays from the Crab Nebula opens up the possibility of testing cosmic ray photon transparency at the multi-hundred TeV scale. Assuming no deviation from a source gamma-ray emission due to accelerated electron inverse-Compton scattering, higher event energies can extend constraints on the effects of new physics;we consider oscillation between gamma-rays and axions, plus attenuation effects from gamma-ray absorption in the case of dark photon dark matter. Combining the recent ASγ and HAWC sub-PeV data with earlier MAGIC and HEGRA data, axion-like particles are most constrained in the 2 × 10−7 − 6 × 10−7 eV mass range, where the coupling gaγγ is constrained to be below 1.8 × 10−10 GeV−1. Direct scattering from dark photon dark matter limits kinetic mixing ∊ ∼ 10−3 for masses between 0.01 and 1 eV. Copyright © 2020, The Authors. All rights reserved.

关键词： Photons

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analysis of the 1.3–1.7 yr Oscillation Relationship between Solar and Geomagnetic Activities

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Chinese Astronomy and Astrophysics 2019年第3期43卷 365-374页

作者： Ya-wen, Q.I.A.N. Song, F.E.N.G. Lin-hua, D.E.N.G. Wei-hang, L.I.U. Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming 650500 China Key Laboratory of Solar Activity National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Yunnan Observatories Chinese Academy of Sciences Kunming 650216 China

The study on the 1.3–1.7 yr period of the solar and geomagnetic activities is very important for understanding the possible physical processes in the solar-terrestrial coupling system. The sunspot is the most prominent magnetic field structure in the solar photosphere, and the Ap index is an important indicator for the global geomagnetic activity level. The 1.3–1.7 yr period for the sunspot number and the geomagnetic Ap index is obtained by the synchro-squeezing wavelet transform, and the phase relationship between them is studied by the cross-correlation analysis. The main results are as follows: (1) The 1.3–1.7 yr period of the geomagnetic Ap index and sunspot number exhibits an intermittent evolutionary characteristics, and changes continuously with the time;(2) the geomagnetic Ap index has a higher periodic component in the odd solar cycles than the neighboring even solar cycles, which is characterized by fluctuations;(3) the phase relationship between the geomagnetic Ap index and the sunspot number is not always invariant, in most cases the geomagnetic Ap index lags behind the sunspot number, except in the 18th and 22th solar cycles. © 2019

关键词： methods: data analysis Sun: activity Sunspots

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analysis of the Impact of Large Constellations on the Space Debris Environment and Countermeasures

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Aerospace China 2020年第2期21卷 16-22页

作者： CHEN Chuan YANG Wulin GONG Zizheng ZHANG Pinliang LI Ming Beijing Institute of Spacecraft Environment Engineering Beijing 100094 National Key Laboratory of Science and Technology on Reliability and Environment Engineering Beijing 100094 China Academy of Space Technology Beijing 100094

Large constellations have developed rapidly in recent years because of their unique advantages, but they will inevitably have a major negative impact on the space debris environment, leading to its deterioration. The key to mitigate the impact is the success rate and duration of the post-mission disposal(PMD) process. Aiming at solving this problem, this paper further studies the impact of large constellations on other space assets under different PMD strategies through simulation, and proposes corresponding strategies and suggestions for *** to One Web’s large constellation launch plan, the dangerous intersection of the large constellation with existing space assets at different stages of the constellations life cycle is calculated by simulation. Based on this, the influence of the large constellation operation on existing space assets at different times and strategies of PMD is analyzed. The conclusion shows that in the PMD stage, large constellations have the greatest impact on existing space assets;the PMD duration and number of satellites performing PMD at the same time are key factors to the degree of negative impact. The faster the PMD is, the less threat it poses to other spacecraft. More results and conclusions are still being analyzed.

关键词： large constellations space debris environment long-term environmental evolution impact probability dangerous intersection coping strategies

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GRB 210121A: A typical fireball burst detected by two small missions

arXiv

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arXiv 2021年

作者： Wang, Xiangyu Ivy Zheng, Xutao Xiao, Shuo Yang, Jun Liu, Zi-Ke Yang, Yu-Han Zou, Jin-Hang Zhang, Bin-Bin Zeng, Ming Xiong, Shao-Lin Feng, Hua Song, Xin-Ying Wen, Jiaxing Xu, Dacheng Chen, Guo-Yin Ni, Yang Zhang, Zi-Jian Wu, Yu-Xuan Cai, Ce Cang, Jirong Deng, Yun-Wei Gao, Huaizhong Kong, De-Feng Huang, Yue Li, Cheng-Kui Li, Hong Li, Xiao-Bo Liang, En-Wei Lin, Lin Liu, Yihui Long, Xiangyun Lu, Dian Luo, Qi Ma, Yong-Chang Meng, Yan-Zhi Peng, Wen-Xi Qiao, Rui Song, Li-Ming Tian, Yang Wang, Pei-Yuan Wang, Ping Wang, Xiang-Gao Xu, Sheng Yang, Dongxin Yin, Yi-Han Zeng, Weihe Zeng, Zhi Zhang, Ting-Jun Zhang, Yuchong Zhang, Zhao Zhang, Zhen School of Astronomy and Space Science Nanjing University Nanjing210093 China Department of Engineering Physics Tsinghua University Beijing100084 China Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences 19B Yuquan Road Beijing100049 China University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing100049 China College of Physics Hebei Normal University Shijiazhuang050024 China Key Laboratory of Modern Astronomy and Astrophysics Nanjing University Ministry of Education China Department of Physics and Astronomy University of Nevada Las VegasNV89154 United States Key Laboratory of Particle and Radiation Imaging Tsinghua University Ministry of Education Beijing100084 China Department of Astronomy Tsinghua University Beijing100084 China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and Technology Guangxi University Nanning530004 China Department of Astronomy Beijing Normal University Beijing100875 China Kuang Yaming Honor School Nanjing University Nanjing210093 China School of Physics Nanjing University Nanjing210093 China Department of Physics Tsinghua University Beijing100084 China

The Chinese CubeSat Mission, Gamma Ray Integrated Detectors (GRID), recently detected its first gamma-ray burst, GRB 210121A, which was jointly observed by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM). This burst is confirmed by several other missions, including fermi and Insight-HXMT. We combined multi-mission observational data and performed a comprehensive analysis of the burst's temporal and spectral properties. Our results show that the burst is relatively special in its high peak energy, thermal-like low energy indices, and large fluence. By putting it to the Ep-Eγ,isorelation diagram with assumed distance, we found this burst can be constrained at the redshift range of [0.3,3.0]. The thermal spectral component is also confirmed by the direct fit of the physical models to the observed spectra. Interestingly, the physical photosphere model also constrained a redshift of z ∼ 0.3 for this burst, which help us to identify a host galaxy candidate at such a distance within the location error box. Assuming the host galaxy is real, we found the burst can be best explained by the photosphere emission of a typical fireball with an initial radius of r0∼ 3.2 × 107cm. Copyright © 2021, The Authors. All rights reserved.

关键词： Gamma rays

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