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Giant low-field magnetocaloric effect in unstable antiferromagnetic Tm1-xErxNi2Si2（x=0.2,0.4） compounds

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Journal of Rare Earths 2025年第2期43卷 312-318页

作者： Bo Xu lu tian Junfeng Wang Mei Wu Xinqiang Gao Zhenxing Li Jun Shen School of Rare Earths University of Science and Technology of China Key Laboratory of Rare Earths Ganjiang Innovation AcademyChinese Academy of Sciences Department of Energy and Power Engineering School of Mechanical EngineeringBeijing Institute of Technology

Magnetic refrigeration（MR） technology is regarded as an ideal solution for cryogenic applications,relying on magnetocaloric materials which provide necessary chilling effect.A series of polycrystalline Tm1-xErxNi2Si2（x=0.2,0.4） compounds was synthesized,and their magnetic properties,magnetic phase transition together with magnetocaloric effect（MCE） were *** Tm1-xErxNi2Si2（x=0.2,0.4）compounds display a field-induced metamagnetic transition from antiferromagnetic（AFM） to ferromagnetism（FM） in excess of 0.2 T,***,the AFM ground state is *** the field change of 0-2 T,the values of maximal magnetic entropy change(-ΔSMmax) and refrigerant capacity（RC） for Tm0.8Er0.2Ni2Si2compound are 17.9 J/（kg·K） and 83.5 J/kg,*** large reversible MCE under low magnetic fields（≤2 T） indicates that Tm0.8Er0.2Ni2Si2compound can serve as potential candidate materials for cryogenic magnetic refrigeration.

关键词： Cryogenic magnetic refrigeration Magnetocaloric effects Magnetocaloric materials Rare earths TmNi2Si2

Toroidal torques due to n=1 magnetic perturbations in ITER baseline scenario

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Plasma Science and Technology 2025年第1期27卷 39-51页

作者： Jingwei LI Li LI Yueqiang LIU Yunfeng LIANG Yanfei WANG lu tian Zhongqing LIU Fangchuan ZHONG College of Physics Donghua UniversityShanghai 201620People’s Republic of China Member of Magnetic Confinement Fusion Research Centre Ministry of EducationShanghai 201620People’s Republic of China General Atomics San Diego CA 92186-5608United States of America Institut für Energie-und Klimaforschung–Plasmaphysik Partner of the Trilateral Euregio Cluster(TEC)Forschungszentrum Juülich GmbHJülich 52425Germany

Toroidal torques,generated by the resonant magnetic perturbation(RMP)and acting on the plasma column,are numerically systematically investigated for an ITER baseline *** neoclassical toroidal viscosity(NTV),in particular the resonant portion,is found to provide the dominant contribution to the total toroidal torque under the slow plasma flow regime in *** the electromagnetic torque always opposes the plasma flow,the toroidal torque associated with the Reynolds stress enhances the plasma flow independent of the flow direction.A peculiar double-peak structure for the net NTV torque is robustly computed for ITER,as the toroidal rotation frequency is scanned near the zero *** structure is found to be ultimately due to a non-monotonic behavior of the wave-particle resonance integral(over the particle pitch angle)in the superbanana plateau NTV regime in *** findings are qualitatively insensitive to variations of a range of factors including the wall resistivity,the plasma pedestal flow and the assumed frequency of the rotating RMP field.

关键词： toroidal torques resonant magnetic perturbation fieds plasma flow ITER baseline scenario

医养结合的延续性护理在老年慢性病患者中的应用效果

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中国民康医学 2025年第1期37卷 161-163,170页

作者：田璐郑州颐和医院全科医学科河南郑州450000

目的:观察医养结合的延续性护理在老年慢性病患者中的应用效果。方法:选取2022年1月至2023年1月该院收治的150例老年慢性病患者进行前瞻性研究,按照随机数字表法将其分为对照组和观察组各75例。对照组实施常规护理,观察组实施医养结合... 详细信息

目的:观察医养结合的延续性护理在老年慢性病患者中的应用效果。方法:选取2022年1月至2023年1月该院收治的150例老年慢性病患者进行前瞻性研究,按照随机数字表法将其分为对照组和观察组各75例。对照组实施常规护理,观察组实施医养结合的延续性护理。比较两组护理前后疾病认知评分、孤独程度[加利福尼亚大学洛杉矶分校(UCLA)孤独量表]评分、自我管理能力[成年人健康自我管理能力测评量表(AHSMSRS)]评分、生命质量[生活质量综合评定问卷(GQOLI-74)]评分。结果:护理后,两组疾病认知能力评分均高于护理前,且观察组高于对照组,差异有统计学意义(P<0.05);两组UCLA孤独量表评分均低于护理前,且观察组低于对照组,差异有统计学意义(P<0.05);两组自我管理行为、自我管理认知、自我管理环境等各项AHSMSRS评分均高于护理前,且观察组高于对照组,差异有统计学意义(P<0.05);两组躯体功能、心理功能、社会功能、物质生活等各项GQOLI-74评分均高于护理前,且观察组高于对照组,差异有统计学意义(P<0.05)。结论:医养结合的延续性护理应用于老年慢性病患者可提高疾病认知能力、自我管理能力和生命质量评分,以及降低孤独程度评分的效果优于常规护理效果。

关键词：老年慢性病医养结合延续性护理认知能力孤独程度自我管理能力

GRB 201223A: Implication of Fallback Accretion onto the Newborn Black Hole from its Multiband Afterglow

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Research in Astronomy and Astrophysics 2025年第2期25卷 13-22页

作者： tian-Hua lu Dong Xu Wei-Hua Lei Shao-Yu Fu Shuai-Qing Jiang Zi-Pei Zhu Xing Liu Jie An Key Laboratory of Space Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences School of Astronomy and Space Science University of Chinese Academy of Sciences Chinese Academy of Sciences Department of Astronomy School of Physics Huazhong University of Science and Technology

Multiband afterglow observations of gamma-ray bursts（GRBs） are important for studying the central ***201223A is a GRB with prompt optical detection by GW *** we report on the early optical afterglow of GRB 201223A detected by NEXT（only 2.8 minutes after the Swift/BAT trigger）,which smoothly connects the prompt optical emission and the afterglow *** Amati diagrams and considering the detection of afterglow emission in the Swift u-band,we suggest a redshift range of *** on our optical data and combined with early optical observation from GW AC and early X-ray data from Swift/XRT,a multiband fitting is performed using PyFRS,and we obtain the best afterglow parameters（assuming a redshift of z=1.0）:EK,iso=5.01-1.70+1.91× 1054erg,Γ0=426.58-138.18+148.86,θj=25.98-10.54+9.67deg,n0=0.30-0.26+3.78cm-3,p=2.32-0.01+0.01,εe=3.31-0.86+1.59× 10-5,εB=3.47-2.62+4.12× *** late-time X-ray shows a re-brightening,indicating late-time central engine *** comparing the leading two central engine models,i.e.,magnetar model and hyperaccreting black hole model,we find that the fallback accretion onto a newborn black hole provides a better explanation for the X-ray re-brightening with fallback accretion rate Mp（■）2.76 × 10-9M⊙s-1and the total fallback accreted mass Mfb（■）1.41 × 10-6M⊙.

关键词： GRB: afterglow GRB: central engine GRB: GRB 201223A

员工帮助计划在护士群体中实施的SWOT-PEST分析

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护理学杂志 2025年第1期40卷 12-17页

作者：刘于于明峰田露杨斯钰华中科技大学同济医学院附属同济医院护理部湖北武汉430030

增进护士队伍稳定性是医院人力资源管理的重要议题。基于文献分析及质性访谈结果,构建SWOT-PEST分析模型,从政治、经济、社会、技术4个方面,综合探究对护士群体实施员工帮助计划的优势、劣势、机会和威胁,为我国护士队伍健康发展及管理... 详细信息

增进护士队伍稳定性是医院人力资源管理的重要议题。基于文献分析及质性访谈结果,构建SWOT-PEST分析模型,从政治、经济、社会、技术4个方面,综合探究对护士群体实施员工帮助计划的优势、劣势、机会和威胁,为我国护士队伍健康发展及管理策略制订提供依据。

关键词：护士员工帮助计划身心健康职业健康人力资源管理 SWOT分析 PEST分析

教育数字化转型背景下高校外语教师数字素养及其提升路径研究

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鲁东大学学报(哲学社会科学版) 2025年第1期42卷 62-67页

作者：王玮鲁天滨州医学院外国语与国际交流学院山东烟台264000

随着教育数字化转型的不断推进,高校外语教学面临着新的机遇与挑战,高校外语教师的数字素养成为当下的关键议题和关注焦点。当前高校部分外语教师数字化意识淡薄、数字化资源整合能力不足、缺乏科学的培训和评价体系,这些问题在一定程... 详细信息

随着教育数字化转型的不断推进,高校外语教学面临着新的机遇与挑战,高校外语教师的数字素养成为当下的关键议题和关注焦点。当前高校部分外语教师数字化意识淡薄、数字化资源整合能力不足、缺乏科学的培训和评价体系,这些问题在一定程度上制约了高校外语教学与教育数字化转型的协同发展。今后高校外语教师应增强自身的数字化意识,改变传统教育理念。高校应建立校际间的合作交流智能化平台以推动共享共建共学,开展以实践为导向、面向课堂的系统性培训,建立“以评促学、以评促用、以评促优”的高校外语教师数字素养评价体系,以进一步提升高校外语教师的数字素养和高校外语教学质量,更好地促进教育数字化转型。

关键词：高校外语教师数字素养现实困境提升路径

Radiokrypton dating coming of age

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National Science Review 2016年第2期3卷 172-173页

作者： Zheng-tian lu Hefei National Laboratory for Physical Sciences at the Microscale Synergetic Innovation Center of Quantum Information & Quantum PhysicsUniversity of Science and Technology of China

The dream of radiokrypton dating began in 1969 when Heinz Hugo Loosli and Hans Oeschger of the University of Bern first detected the decay of;Rr（half-life=230 000 yr）in krypton gas extracted from air[1].This isotope is produced in the upper atmosphere by cosmic-ray-induced spallation and neutron-activation of stable *** to its long residence time（;0;yr）in the atmosphere,;Rr is uniformly

关键词： Radiokrypton dating coming of age ATA

Improved Bag-of-Words Model for Person Re-identification

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Tsinghua Science and Technology 2018年第2期23卷 145-156页

作者： lu tian Shengjin Wang Department of Electronic Engineering Tsinghua University Beijing 100084 China.

Person re-identification(person re-id) aims to match observations on pedestrians from different *** is a challenging task in real word surveillance systems and draws extensive attention from the *** existing methods are based on supervised learning which requires a large number of labeled data. In this paper, we develop a robust unsupervised learning approach for person re-id. We propose an improved Bag-of-Words(i Bo W) model to describe and match pedestrians under different camera views. The proposed descriptor does not require any re-id labels, and is robust against pedestrian variations. Experiments show the proposed i Bo W descriptor outperforms other unsupervised methods. By combination with efficient metric learning algorithms, we obtained competitive accuracy compared to existing state-of-the-art methods on person re-identification benchmarks, including VIPe R, PRID450 S, and Market1501.

关键词： person re-identification bag-of-words unsupervised learning feature fusion

New determination of the gravitational constant G

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National Science Review 2020年第12期7卷 1796-1797页

作者： Zheng-tian lu Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Quantum Information and Quantum PhysicsUniversity of Science and Technology of China

A new and so far the most precise determination of the gravitational constant G has been made by Jun luo and colleagues at the Huazhong University of Science and Technology(HUST) [1].The combination of G with two other most fundamental physical constants,the speed of light c and Planck’s constant h,can together construct the natural units(*** units) of time,length and *** relationships inform us that,

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