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Gravitational Wave Radiation from Newborn Accreting Magnetars

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Research in Astronomy and Astrophysics 2023年第2期23卷 28-41页

作者： Quan Cheng xiao-Ping Zheng xi-long Fan xi Huang Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of Physics and Technology Wuhan UniversityWuhan 430072.China School of Mathematical and Physical Sciences Wuhan Textile UniversityWuhan 430200China

The observed electromagnetic radiation from some long and short gamma-ray bursts,and neutron stars(NSs),and the theoretical models proposed to interpret these observations together point to a very interesting but confusing problem,namely,whether fall-back accretion could lead to dipole field decay of newborn *** this paper,we investigate the gravitational wave(GW) radiation of newborn magnetars with a fall-back disk formed in both the core-collapse of massive stars and the merger of binary *** make a comparison of the results obtained with and without fall-back accretion-induced dipole-field decay(FADD) *** on the fall-back parameters,initial parameters of newborn magnetars,and models used to describe FADD,FADD may indeed occur in newborn *** of the low dipole fields caused by FADD,the newborn magnetars will be spun up to higher frequencies and have larger masses in comparison with the non-decay *** the GW radiation of newborn accreting magnetars would be remarkably *** propose that observation of GW signals from newborn magnetars using future GW detectors may help to reveal whether FADD could occur in newborn accreting *** model is also applied to the discussion of the remnant of *** the post-merger GW searching results of Advanced LIGO and Advanced Virgo we cannot confirm the remnant is a low-dipole-field long-lived *** detection of GWs from GW170817-like events using more sensitive detectors may help to clarify the FADD puzzle.

关键词： stars neutron-stars magnetars-stars magnetic field-gravitational waves

Effects of a high magnetic field on single-phase interface evolution,additional interfacial energy and nucleation undercooling in Al-based alloy

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Journal of Materials Science & Technology 2023年第23期154卷 43-53页

作者： Lin Wang Zhipeng long long Hou Song Yan Baode Sun xi Li Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming Shanghai Jiao Tong University Shanghai 200240 China State Key Laboratory of Advanced Special Steels Shanghai University Shanghai 200072 China

The effects of a high magnetic field on the evolution of the single-phase interface and the liquid-solid interface energy in Al-Cu alloy were investigated *** is found that the application of the magnetic field has a significant promotion effect on the migration of liquid droplets,accelerating the formation of the single-phase *** should be attributed to the thermoelectric(TE)magnetic convection in the droplets which has enhanced the diffusion and increased the migration speed of liquid ***,the effect of the high magnetic field on the solid-liquid interface energy is analyzed by an improved grain boundary groove(GBG)*** average solid-liquid interface energy of theα-Al/Al-Cu and Al2Cu/Al-Cu systems increases and decreases with the increase of the magnetic field,*** above experiment results are well explained based on the formation and interaction of the magnetic dipole at the solid-liquid ***,experimental results reveal that the magnetic-field-induced interface energy increases and decreases the nucleation undercooling of the Al-30wt.%Cu alloy and Al-35wt.%Cu alloy,*** studying the effect of the magnetic-field-induced interface energy on the nucleation undercooling,the understanding of the interface energy-induced nucleation undercooling deepens.

关键词： High magnetic field Interface energy Nucleation undercooling Grain boundary groove

Inferring the spin distribution of binary black holes using deep learning

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Chinese Physics C 2024年第10期48卷 275-283页

作者： Li Tang xi-long Fan School of Math and Physics Mianyang Teachers'CollegeMianyang 621000China School of Physics and Technology Wuhan UniversityWuhan 430072 China

The spin characteristics of black holes offer valuable insights into the evolutionary pathways of their progenitor *** is crucial for understanding the broader population properties of black *** hierarchical Bayesian inference techniques employed to discern these properties often demand substantial time,and consensus regarding the spin distribution of binary black hole(BBH)systems remains *** this study,leveraging observations from GWTC-3,we adopted a machine learning approach to infer the spin distribution of black holes within BBH ***,we developed a deep neural network(DNN)and trained it using data generated from a Beta *** training strategy,involving the segregation of data into 10 bins,not only expedites model training but also enhances the versatility and adaptability of the DNN to accommodate the growing volume of gravitational wave *** Monte Carlo-bootstrap(MC-bootstrap)to generate observation-simulated samples,we derived spin distribution parameters:α=1.3_(-0.18)^(+0.25),β=1.70_(-0.29)^(+0.24)for the larger BH sample and α=1.37_(-0.20)^(+0.31),β=1.63_(-0.20)^(+0.30) for the smaller BH *** our constraints,the distributions of component spin magnitudes suggest the likelihood of both black holes in the BBH merger possessing non-zero spin.

关键词： gravitational wave black hole merges deep learning

Tailoring perpendicular magnetic anisotropy in Co/Pt multilayers by interface doping with ultrathin Fe layer

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Rare Metals 2022年第11期41卷 3823-3827页

作者： xi Chen Shao-long Jiang Dong-Wei Wang Kang Yang Jin-Hui Lu Guang-Hua yu Department of Materials Physics and Chemistry University of Science and Technology BeijingBeijing100083China National Center for Nanoscience and Nanotechnology Beijing100190China

The effect of ultrathin Fe layer on perpendicular magnetic anisotropy(PMA) in magnetron-sputtered Co/Pt multilayers was investigated by magnetic *** hysteresis(M-H) loops and microstructures of the samples were measured by vibrating sample magnetometer(VSM) and X-ray diffraction(XRD) and highresolution transmission electron microscopy(HRTEM),*** is found that the PMA is strongly dependent on the interface where Fe layer was *** Fe layer was doped at Co/Pt interface where Pt was deposited on Co,the PMA decreases monotonically with Fe layer thickness(tFe) ***,when Fe layer was doped at Pt/Co interface where Co was deposited on Pt,the PMA shows a peak at t_(Fe)=0.1 *** is considered that the PMA variation is mainly due to the tuning in the electron occupation states of 3 d orbits at Fe-doped Pt/Co ***,the annealing stability of PMA can also be improved when Fe layer was doped at Pt/Co *** results demonstrate that the magnetic anisotropy evolution is mainly caused by anneal-induced interdiffusion.

关键词： Perpendicular magnetic anisotropy Co/Pt multilayers Interface doping Annealing stability Interdiffusion

水痘合并金黄色葡萄球菌性烫伤样皮肤综合征1例

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传染病信息 2021年第6期34卷 572-574页

作者：龙细雨孙小雪郭丽颖雷金艳贾建伟天津中医药大学研究生院 301617 天津市第二人民医院中医、中西医结合Ⅰ科 300192

水痘是由水痘-带状疱疹病毒感染所致的急性传染病,飞沫和直接接触是其主要传播途径,临床表现以发热及皮肤黏膜分批出现皮疹为特征。该病易继发细菌感染,其中最常见的是皮肤感染,若不及时干预,可进展为脓毒血症。本文报道1例水痘合并金... 详细信息

水痘是由水痘-带状疱疹病毒感染所致的急性传染病,飞沫和直接接触是其主要传播途径,临床表现以发热及皮肤黏膜分批出现皮疹为特征。该病易继发细菌感染,其中最常见的是皮肤感染,若不及时干预,可进展为脓毒血症。本文报道1例水痘合并金黄色葡萄球菌性烫伤样皮肤综合征患儿的诊治过程,并进行文献复习。

关键词：水痘金黄色葡萄球菌性烫伤样皮肤综合征

Characterizing the Chaos in a Steady-State Plasma Discharge

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Chinese Physics Letters 1999年第10期16卷 742-744页

作者： MA Lian-xi WANG long Institute of Physics Chinese Academy of SciencesBeijing 100080 Physics Division China University of GeosciencesBeijing 100083

Chaos transited from period doubling in plasmas is characterized with severed *** and fast Fourier transform conSrm that the signal is *** dimensional unimodal like structures of the return maps of next amplitude with peak and valley values are obtained to illustrate the deterministic *** experiments on one-dimensional logistic map are carried out to simulate the experimental *** Lyapunov exponent 1.33±0.10,directly calculated from the experimental data,provides the evidence that the signal is *** dimension 2.75±0.05 demonstrates that this signal is decreased to a low dimensional attractor in the plasma.

关键词： methods. Chaos doubling

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高聚物作为空穴传输材料的研究

山东科技大学学报（自然科学版） 2006年第3期25卷 81-84页

作者：付龙李廷希于文文黄仁和山东科技大学材料科学与工程学院山东青岛266510

有机电致发光一直是学术界的一个研究热点。其核心材料主要包括发光材料,电子传输材料和空穴传输材料。介绍了高聚物空穴传输材料的研究进展情况,探讨了高聚物空穴传输材料的分子结构与器件性能的关系。

关键词：有机电致发光材料空穴传输材料高聚物有机EL器件

Feasibility study of the photonuclear reaction cross section of medical radioisotopes using a laser Compton scattering gamma source

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Nuclear Science and Techniques 2024年第9期35卷 168-177页

作者： yu-Ning Gu Wei-Juan Zhao xi-Guang Cao yu-Xuan Yang Ting-Kai Ma Zheng-Li Liao Fei-long Xu yu-Gang Ma School of Physics and Microeletronics Zhengzhou UniversityZhengzhou 450001China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China School of Nuclear Science and Technology University of South ChinaHengyang 421001China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan UniversityShanghai 200438China

In recent years,the gap between the supply and demand of medical radioisotopes has increased,necessitating new methods for producing medical *** reactions based on gamma sources have unique advantages in terms of producing high specific activity and innovative medical ***,the lack of experimental data on reaction cross sections for photonuclear reactions of medical radioisotopes of interest has severely limited the development and production of photonuclear transmutation medical *** this study,the entire process of the generation,decay,and measurement of medical radioisotopes was simulated using online gamma activation and offline gamma measurements combined with a shielding gamma-ray *** on a quasi-monochromatic gamma beam from the Shanghai Laser Electron Gamma Source(SLEGS),the feasibility of this measurement of production cross section for surveyed medi-cal radioisotopes was simulated,and specific solutions for measuring medical radioisotopes with ultra-low production cross sections were *** feasibility of this method for high-precision measurements of the reaction cross section of medical radioisotopes was demonstrated.

关键词： Medical radioisotope Photonuclear reaction GEANT4 Shanghai Laser Electron Gamma Source(SLEGS) Low-background gamma-ray spectrometer

Targeting TrkB–PSD-95 coupling to mitigate neurological disorders

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Neural Regeneration Research 2025年第3期20卷 715-724页

作者： xin Yang yu-Wen Alvin Huang John Marshall Department of Molecular Biology Cell Biology and BiochemistryBrown UniversityProvidenceRIUSA Department of Neurology Warren Alpert Medical School of Brown UniversityProvidenceRIUSA Center for Translational Neuroscience Robert J.and Nancy D.Carney Institute for Brain Science and Brown Institute for Translational ScienceBrown UniversityProvidenceRIUSA

Tropomyosin receptor kinase B(TrkB)signaling plays a pivotal role in dendritic growth and dendritic spine formation to promote learning and *** activity-dependent release of brain-derived neurotrophic factor at synapses binds to pre-or postsynaptic TrkB resulting in the strengthening of synapses,reflected by long-term ***,the association of postsynaptic density protein-95 with TrkB enhances phospholipase Cγ-Ca^(2+)/calmodulin-dependent protein kinaseⅡand phosphatidylinositol 3-kinase-mechanistic target of rapamycin signaling required for long-term *** this review,we discuss TrkB-postsynaptic density protein-95 coupling as a promising strategy to magnify brain-derived neurotrophic factor signaling towards the development of novel therapeutics for specific neurological disorders.A reduction of TrkB signaling has been observed in neurodegenerative disorders,such as Alzheimer's disease and Huntington's disease,and enhancement of postsynaptic density protein-95 association with TrkB signaling could mitigate the observed deficiency of neuronal connectivity in schizophrenia and *** with brain-derived neurotrophic factor is problematic,due to poor pharmacokinetics,low brain penetration,and side effects resulting from activation of the p75 neurotrophin receptor or the truncated TrkB.T1 *** TrkB agonists and antibodies that activate TrkB are being intensively investigated,they cannot distinguish the multiple human TrkB splicing isoforms or cell type-specific *** TrkB–postsynaptic density protein-95 coupling provides an alternative approach to specifically boost TrkB signaling at localized synaptic sites versus global stimulation that risks many adverse side effects.

关键词： Angelman syndrome autism brain-derived neurotrophic factor depression neurodegenerative disorder neurodevelopmental disorder postsynaptic density protein-95 synaptic plasticity TrkB