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On the Energy Budget of Starquake-induced Repeating Fast Radio Bursts

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Research in Astronomy and Astrophysics 2024年第10期24卷 180-188页

作者： Wei-Yang Wang Chen Zhang enping zhou Xiaohui Liu Jiarui Niu Zixuan zhou He Gao Jifeng Liu Renxin Xu Bing Zhang School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China The HKUST Jockey Club Institute for Advanced Study The Hong Kong University of Science and TechnologyHong KongChina School of Physics Huazhong University of Science and TechnologyWuhan 430074China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Mathematics and Physics University of Science and TechnologyBeijing 100083China Department of Astronomy Beijing Normal UniversityBeijing 100875China New Cornerstone Science Laboratory National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Nevada Center for Astrophysics University of NevadaLas VegasNV 89154USA Department of Physics and Astronomy University of NevadaLas VegasNV 89154USA

With a growing sample of fast radio bursts(FRBs),we investigate the energy budget of different power sources within the framework of magnetar starquake triggering *** a starquake,the energy can be released in any form through strain,magnetic,rotational,and gravitational *** strain energy can be converted from three other kinds of energy during *** following findings are revealed:(1)The crust can store free magnetic energy of~10^(46)erg by existing toroidal fields,sustaining 10^(6)bursts with frequent starquakes occurring due to crustal instability.(2)The strain energy develops as a rigid object spins down,which can be released during a global starquake accompanied by a ***,it takes a long time to accumulate enough strain energy via spindown.(3)The rotational energy of a magnetar with P■0.1 s can match the energy and luminosity budget of FRBs.(4)The budget of the total gravitational energy is high,but the mechanism and efficiency of converting this energy to radiation deserve further exploration.

关键词： stars:magnetars stars:neutron radiation mechanisms:non-thermal

The Precursor of GRB211211A:A Tide-induced Giant Quake?

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Research in Astronomy and Astrophysics 2024年第2期24卷 206-215页

作者： enping zhou Yong Gao Yurui zhou Xiaoyu Lai Lijing Shao Weiyang Wang Shaolin Xiong Renxin Xu Shuxu Yi Garvin Yim Han Yue Zhen Zhang School of Physics Huazhong University of Science and TechnologyWuhan 430074China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China School of Physics Peking UniversityBeijing 100871China Research Center for Astronomy Hubei University of EducationWuhan 430205China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Earth and Space Sciences Peking UniversityBeijing 100871China

The equilibrium configuration of a solid strange star in the final inspiral phase with another compact object is generally discussed,and the starquake-related issue is revisited,for a special purpose to understand the precursor emission of binary compact star merger events(e.g.,that of GRB211211A).As the binary system inspirals inward due to gravitational wave radiation,the ellipticity of the solid strangeon star increases due to the growing tidal field of its compact *** energy is hence accumulated during the inspiral stage which might trigger a starquake before the merger when the energy exceeds a critical *** energy released during such starquakes is calculated and compared to the precursor observation of GRB211211 *** result shows that the energy might be insufficient for binary strangeon-star case unless the entire solid strangeon star shatters,and hence favors a black hole-strangeon star scenario for *** timescale of the precursor as well as the frequency of the observed quasi-periodic-oscillation have also been discussed in the starquake model.

关键词： stars neutron-(stars:)gamma-ray burst general-black hole physics

Causal propagation of signals in strangeon matter

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Science China(Physics,Mechanics & Astronomy) 2018年第8期61卷 82-88页

作者： JiGuang Lu enping zhou XiaoYu Lai RenXin Xu CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100012China Key Laboratory of Radio Astronomy Chinese Academy of SciencesBeijing 100012China School of Physics and State Key Laboratory of Nuclear Science and Technology Peking UniversityBeijing 100871China School of Physics and Mechanical&Electrical Engineering Hubei University of EducationWuhan 430205China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Kavil Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China

The state equation for strangeon matter is very stiff due to the non-relativistic nature of its particles and their repulsive interaction, such that pulsar masses as high as ～ 3M would be expected. However, an adiabatic sound speed, cs = √P/ρ, is usually superluminal in strangeon matter, and the dynamic response of a strangeon star （e.g., binary merger） is not tractable in numerical simulations. In this study, we examined signal propagation in strangeon matter and calculate the actual propagation speed, Csignal. We found that the causality condition, Csignal 〈 c, is satisfied and the signal speed is presented as a function of stellar radius.

关键词： equations of state of neutron-star matter acoustic signal processing control theory

Visibility restoration for real-world hazy images via improved physical model and Gaussian total variation

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Frontiers of Computer Science 2024年第1期18卷 267-269页

作者： Chuan LI enping HU Xinyu ZHANG Hao zhou Hailing XIONG Yun LIU College of Computer and Information Science Southwest UniversityChongqing 400715China School of Big Data and Intelligent Engineering Chongqing College of International Business and EconomicsChongqing 401520China College of Artificial Intelligence Southwest UniversityChongqing 400715China College of Electronic and Information Engineering Southwest UniversityChongqing 400715China

1 Introduction Under real-world haze conditions,the existence of haze particles in the atmosphere reduces the visibility of captured ***,the noise is inevitably introduced into the degraded image,which further deteriorates the visual quality of the *** enhance the visibility and quality of outdoor real-world hazy images,numerous algorithms have been proposed to remove haze from a single input *** existing methods are broadly lumped into two categories:prior-based methods[1,2]and learning-based methods[3–6].Unfortunately,the widely used atmospheric scattering model and the corresponding haze removal methods fail to take the noise interference into account,which may result in poor visibility restoration performance.

关键词： visibility remove noise

Single‑cell sequencing reveals the reproductive variations between primiparous and multiparous Hu ewes

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Journal of Animal Science and Biotechnology 2024年第2期15卷 614-631页

作者： Ting Ge Yifan Wen Bo Li Xiaoyu Huang Shaohua Jiang enping Zhang Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China

Background In the modern sheep production systems,the reproductive performance of ewes determines the economic profitability of *** the genetic mechanisms underlying differences in the litter size is important for the selection and breeding of highly prolific *** sheep,a high-quality Chinese sheep breed,is known for its high fecundity and is often used as a model to study prolificacy *** the current study,animals were divided into two groups according to their delivery rates in three consecutive lambing seasons(namely,the high and low reproductive groups with≥3 lambs and one lamb per season,n=3,respectively).The ewes were slaughtered within 12 h of estrus,and unilateral ovarian tissues were collected and analyzed by 10×Genomics single-cell RNA *** A total of 5 types of somatic cells were identified and corresponding expression profiles were mapped in the ovaries of each ***,the differences in the ovary somatic cell expression profiles between the high and low reproductive groups were mainly clustered in the granulosa ***,four granulosa cell subtypes were *** analysis revealed that the abundance of JPH1 expression and the reduction of LOC101112291 expression could lead to different evolutionary directions of the granulosa ***,the expression levels of FTH1 and FTL in mural granulosa cells of the highly reproductive group were significantly *** genes inhibit necroptosis and ferroptosis of mural granulosa cells,which helps prevent follicular *** This study provides insights into the molecular mechanisms underlying the high fecundity of Hu *** differences in gene expression profiles,particularly in the granulosa cells,suggest that these cells play a critical role in female *** findings also highlight the importance of genes such as JPH1,LOC101112291,FTH1,and FTL in regulating granulosa cell function and follicular development.

关键词： Granulosa cells Hu sheep Lambing number Ovarian somatic cells Single-cell RNA sequencing

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从地震到星震

中国科学：物理学、力学、天文学 2024年第8期54卷 27-48页

作者：路瑞鹏高勇胡岩来小禹李洪波卢吉光邵立晶王平汪卫华王维扬夏铖君胥恒徐仁新徐世庆岳汉赵里郑小平周恩平邹远川北京大学理论与应用地球物理研究所北京100871 北京大学科维理天文与天体物理研究所北京100871 中国科学技术大学地球和空间科学学院合肥230026 湖北第二师范学院天文学研究中心武汉430205 中国科学院国家天文台北京100101 中国科学院高能物理研究所北京100049 温州大学数理学院温州325035 中国科学院大学天文与空间科学学院北京100049 扬州大学引力与宇宙学研究中心扬州225009 南方科技大学地球与空间科学系深圳518055 华中科技大学物理学院天文系武汉430074 华中师范大学天体物理研究所武汉430079

探索强引力场情形下致密物质的存在形式伴随着人类认识和发展量子论与引力论的历程,也是当今天文学和物理学领域的热点话题.主序恒星耗尽自身核能源后将会残留这类物质构成的致密天体,进而为多信使天文学提供可靠的观测目标.若致密天体... 详细信息

探索强引力场情形下致密物质的存在形式伴随着人类认识和发展量子论与引力论的历程,也是当今天文学和物理学领域的热点话题.主序恒星耗尽自身核能源后将会残留这类物质构成的致密天体,进而为多信使天文学提供可靠的观测目标.若致密天体的质量不够大、自引力不足以强到塌缩成黑洞,则星核所有原子核可能会挤成一团而表现为“巨核”,即观测到的脉冲星.限于低能强相互作用的认识,虽然尚未定论这类极致密物质的本质,但是有明确的观测证据表明丰富的极端天体物理事件(如伽马射线暴、快速射电暴等)跟巨核紧密相关.值得注意的是,脉冲星往往具有固态的组成部分,在内部应力积累达到某个临界值时将会自然地发生星震.这一事件很可能跟地震类似,并诱发天体的剧烈活动.在回顾了致密星的研究历史和争议后,本文简述地震现象,探讨地震与星震的相似性,进而介绍与脉冲星相关的众多观测现象以及星震的理论模型,最后总结并展望相关研究的未来.希望此文能够促进地震学和天体物理学的交叉融合,期待借助于更高精度多信使天文观测最终揭晓巨核的本质,从而加深关于低能强力的理解.

关键词：脉冲星地震星震核物质全球地震

工作用精密玻璃液体温度计修正值的不确定度评定

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计量与测试技术 2018年第12期45卷 119-120页

作者：周恩平自贡检验检测院四川自贡643000

工作用玻璃液体温度计具有价格低廉、使用方便、性能稳定等优点,广泛应用于石化、机械、医疗和科研等领域,本文就工作用玻璃液体温度计校准方法与大家探讨。

关键词：工作用玻璃液体温度计不确定度评定

Ultrafine ordered L1_(2)-Pt-Co-Mn ternary intermetallic nanoparticles as high-performance oxygen-reduction electrocatalysts for practical fuel cells

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Journal of Energy Chemistry 2024年第6期93卷 157-165,I0005页

作者： enping Wang Liuxuan Luo Yong Feng Aiming Wu Huiyuan Li Xiashuang Luo Yangge Guo Zehao Tan Fengjuan Zhu Xiaohui Yan Qi Kang Zechao Zhuang Daihui Yang Shuiyun Shen Junliang Zhang China-UK Low Carbon College Shanghai Jiao Tong UniversityShanghai 201306China Institute of Fuel Cells Key Laboratory for Power Machinery and Engineering of MOESchool of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Tangfeng Energy Technology Co.Ltd. Shanghai 201306China State Key Laboratory of Advanced Chemical Power Sources Guizhou Meiling Power Sources Co.Ltd.Zunyi 563003GuizhouChina School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai 201804China Department of Chemical Engineering Columbia UniversityNY 10027USA

The long-range periodically ordered atomic structures in intermetallic nanoparticles(INPs)can significantly enhance both the electrocatalytic activity and electrochemical stability toward the oxygen reduction reaction(ORR)compared to the disordered atomic structures in ordinary solid-solution alloy ***,through a facile and scalable synthetic method,a series of carbon-supported ultrafine Pt_3Co_(x)Mn_(1-x)ternary INPs are prepared in this work,which possess the"skin-like"ultrathin Pt shells,the ordered L1_(2) atomic structure,and the high-even dispersion on supports(L1_(2)-Pt_3Co_(x)Mn_(1-x)/~SPt INPs/C).Electrochemical results present that the composition-optimized L1_(2)-Pt_3Co_(0.7)Mn_(0.3)/~SPt INPs/C exhibits the highest electrocata lytic activity among the series,which are also much better than those of the pristine ultrafine Pt/***,it also has a greatly enhanced electrochemical *** addition,the effects of annealing temperature and time are further *** importantly,such superior ORR electrocatalytic performance of L1_(2)-Pt_3Co_(0.7)Mn_(0.3)/~SPt INPs/C are also well demonstrated in practical fuel *** characterization analyses further reveal the major origins of the greatly enhanced ORR electrocata lytic performance:the Pt-Co-Mn alloy-induced geometric and ligand effects as well as the extremely high L1_(2) atomic-ordering *** work not only successfully develops a highly active and stable ordered ternary intermetallic ORR electrocatalyst,but also elucidates the corresponding"structure-function"relationship,which can be further applied in designing other intermetallic(electro)catalysts.

关键词： Platinum Cobalt Manganese Oxygen reduction reaction Ordered intermetallic L1_(2)atomic structure Proton-exchange membrane fuel cell

西南山区输电线路岩石锚杆基础的几个问题探讨

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电力勘测设计 2023年第11期 39-42,55页

作者：杨煜周恩平周欣刘杰四川电力设计咨询有限责任公司四川成都610000

梳理总结西南山区独特的地理地质环境特点,结合区域内输电线路工程实际,对岩石锚杆基础应用中坡度条件与边坡稳定性、覆盖层厚度与基坑安全性、水稳性差的软岩、施工过程、工代、安全度等几个主要问题进行计算分析与探讨,并提出相关建议。

关键词：西南山区输电线路岩石锚杆基础