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Frontiers of physics 2020年第1期15卷 25-41页

作者： Hangwen Guo Mohammad Saghayezhian Zhen Wang Yimei Zhu jiandi zhang Ward Plummer Institute for Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200433China Department of Physics&Astronomy Louisiana State UniversityBaton RougeLA 70803 Condensed Matter Physics&Materials Science Department Brookhaven National LaboratoryUptonNY 11973

Complex oxide interfaces have been one of the central focuses in condensed matter physics and ma-terial *** the past decade,aberration corrected scanning transmission electron microscopy and spectroscopy has proven to be invaluable to visualize and understand the emerging quantum phenomena at an *** this paper,we briefly review some recent progress in the utilization of electron microscopy to probe ***,we discuss several important challenges for electron microscopy to advance our understanding on interface phenomena,from the perspective of variable temperature,magnetism,electron energy loss spectroscopy analysis,electronic symmetry,and defects probing.

关键词： complex oxide interfaces scanning transmission electron microscopy electron energy loss spectroscopy

Can nutrition interventions tackle the global insulin affordability via improving diabetes management and reducing insulin demand?

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Global Health Research and Policy 2022年第1期7卷 447-450页

作者： Victoria Lu jiandi zhang Guoxun Chen Yantai Zestern Biotechnique Co.LTD YantaiShandong 264670China Department of Nutrition University of Tennessee at Knoxville229 Jessie Harris Building1215 West Cumberland AvenueKnoxvilleTN 37909USA

Diabetes,a global health concern,requires insulin *** insulin demand and prices rise dramatically,insulin affordability has increasingly become an issue facing patients with diabetes *** cut insulin costs,many patients ration their supply,which may have dire health *** particularly affects lower-income populations,who are often forced to choose between purchasing their medications or paying for other *** might be one solution for *** commentary aims to provide comprehensive insight with historical context into intersectional components of diabetes in the global arena through analyses of insulin affordability,coupled with the critical role of nutrition intervention after searching the PubMed for relevant *** studies in personalized nutrition,supplementations,and dietary behaviors may develop evidence-based nutrition interventions to control *** argue that alongside price regulation,a greater focus to nutrition to address issues of food insecurity and food assistance programs may help to improve insulin affordability.

关键词： Diabetes Food insecurity Global health Insulin affordability Insulin price Nutrition intervention

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氧化物异质界面上的准二维超导

物理学报 2023年第9期72卷 12-32页

作者：冉峰梁艳张坚地中国科学院物理研究所北京凝聚态国家实验室北京100190

由于对称性破缺、晶格失配、电荷转移和空间限域等多自由度的协同关联作用,氧化物异质界面演生出许多与相应体材料所不同的物理性质,其中氧化物界面超导由于蕴含丰富物理内涵吸引了广泛的关注.近年来,得益于氧化物异质外延以及物性精准... 详细信息

由于对称性破缺、晶格失配、电荷转移和空间限域等多自由度的协同关联作用,氧化物异质界面演生出许多与相应体材料所不同的物理性质,其中氧化物界面超导由于蕴含丰富物理内涵吸引了广泛的关注.近年来,得益于氧化物异质外延以及物性精准表征技术的迅猛发展,研究人员已经在多种氧化物异质界面上观测到了准二维的界面超导,并研究了与其相关的许多新奇量子现象,不仅推动了凝聚态物理研究的发展,也为界面超导走向实际应用奠定了重要基础.本文主要介绍和讨论氧化物界面上的准二维超导,以典型的LaAlO_(3)/SrTiO_(3)界面准二维超导及La_(2)CuO_(4)/La_(1.56)Sr_(0.44)CuO_(4)等铜氧化物界面超导为例,总结分析氧化物界面超导中新奇的物理现象,并指出该研究体系目前存在的一些问题,最后展望界面超导未来的发展方向.

关键词：氧化物界面超导铜基超导二维电子气

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Anomalous strain effect in heteroepitaxial SrRuO_(3) films on(111) SrTiO_(3) substrates

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Chinese Physics B 2022年第12期31卷 412-416页

作者： Zhenzhen Wang Weiheng Qi Jiachang Bi Xinyan Li Yu Chen Fang Yang Yanwei Cao Lin Gu Qinghua zhang Huanhua Wang jiandi zhang Jiandong Guo Xiaoran Liu Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Songshan Lake Materials Laboratory Dongguan 523808China

We report comprehensive investigations into the structure of high-quality(111)-oriented SrRuO_(3)films on SrTiO_(3)substrates to elucidate the effect of(111)heteroepitaxial *** found that SrRuO_(3)film with a thickness of~40 nm is compressively strained in plane on the substrate with full ***,the out-of-plane spacing is almost the same as in the bulk,which is at odds with the conventional *** probing a series of half-order Bragg reflections using synchrotron-based x-ray diffraction combined with analyses of the scanning transmission electron microscopy images,we discovered that the heteroepitaxial strain is accommodated via significant suppression of the degree of c+octahedral tilting and the formation of three equivalent domain structures on the(111)SrTiO_(3)*** anomalous effect sheds light on the understanding of an unconventional paradigm of film-substrate coupling for the(111)heteroepitaxial strain.

关键词： perovskite SrRuO_(3) (111)-oriented thin films heteroepitaxial strain octahedral tilt and rotation

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基于排队论的动态最优保险区块链决策研究

管理工程学报 2024年第3期38卷 172-185页

作者：王丽珍张简荻中央财经大学保险学院北京100081

保险业的经营原则与区块链的共识特征存在基因相似性。本文引入“批排队”理论构建了动态最优保险区块链模型,较好地刻画了按照“先到先服务”原则将包含众多保险交易的区块追加到整个区块链的过程,该模型可以通过最大化保险区块链系统... 详细信息

保险业的经营原则与区块链的共识特征存在基因相似性。本文引入“批排队”理论构建了动态最优保险区块链模型,较好地刻画了按照“先到先服务”原则将包含众多保险交易的区块追加到整个区块链的过程,该模型可以通过最大化保险区块链系统主体效用得到最优的保险交易费率。以中国车险市场2020年的实际经营数据为例进行数值模拟表明,不同参数的变化对保险交易双方效用的影响取决于交易记录延迟时间与交易费率之间的权衡,而对保单区块存储员效用的影响取决于区块存储收益与区块存储成本之间的权衡。相关数据为区块链技术在保险市场中降低经营成本、提高经营效率、释放劳动力等提供了理论支持。

关键词：保险交易区块链排队论交易费率保单区块存储人

Ultrathin Limit on the Anisotropic Superconductivity of Single-Layered Cuprate Films

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Chinese Physics Letters 2024年第2期41卷 94-101页

作者：冉峰陈潘李丁艺熊沛雨樊子鑫凌浩铭梁艳张坚地 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

Exploring dimensionality effects on cuprates is important for understanding the nature of high-temperature *** atomically layer-by-layer growth with oxide molecular beam epitaxy,we demonstrate that La_(2−x)Sr_(x)CuO_(4)(x=0.15)thin films remain superconducting down to 2 unit cells of thickness but quickly reach the maximum superconducting transition temperature at and above 4 unit *** fitting the critical magnetic field(μ0H_(c2)),we show that the anisotropy of the film’s superconductivity increases with decreasing film thickness,indicating that the superconductivity of the film gradually evolves from weak three-to two-dimensional *** results are helpful to gain more insight into the nature of high-temperature superconductivity with dimensionality.

关键词： dimensionality film evolve

四参饮衍生方联合阿替洛尔对快速心律失常的临床研究

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辽宁中医杂志 2019年第11期46卷 2371-2374页

作者：张韫迪辽河油田总医院中医科

目的:探讨四参饮衍生方联合阿替洛尔对快速心律失常的临床研究。方法:将2016年4月-2018年2月收治的78例快速心律失常患者随机分为对照组与试验组,每组39例。入院后,均接受常规控制血压、纠正电解质紊乱以及营养心肌等对症支持治疗,对照... 详细信息

目的:探讨四参饮衍生方联合阿替洛尔对快速心律失常的临床研究。方法:将2016年4月-2018年2月收治的78例快速心律失常患者随机分为对照组与试验组,每组39例。入院后,均接受常规控制血压、纠正电解质紊乱以及营养心肌等对症支持治疗,对照组予阿替洛尔片12. 5 mg/次,2次/d;试验组加用中药四参饮衍生方口服,1剂/d。均持续治疗1个月。测量血压、心率、心功能[左室射血分数(LVEF)、左室舒张期内压(LVDd)、E峰/A峰流速比值(E/A)]、心率变异[24 h内窦性心搏RR间期标准差(SDNN)、24 h内每5 min窦性心搏RR间期平均值标准差(SDANN)、24 h内每5 min窦性心搏RR间期标准差均值(SDNNI)、相邻窦性心搏RR间期差值均方根(RMSSD),4h相邻窦性心搏RR间期差值超过50 ms百分比(PNN50)]变化,比较临床疗效。结果:与治疗前比较,两组收缩压、舒张压、心率水平均显著降低(P <0. 01),LVEF水平显著升高(P <0. 01),LVDd、E/A水平均显著降低(P <0. 01,SDNN、SDANN、SDNNI、RMSSD、以及PNN50水平均明显升高(P <0. 05);与对照组比较,试验组收缩压、舒张压、心率水平均显著较低(P <0. 01),LVEF水平显著较高(P <0. 01),LVDd、E/A水平均显著较低(P <0. 01),SDNN、SDANN、SDNNI、RMSSD、以及PNN50水平均明显较高(P <0. 05),治疗有效率较高(P <0. 05)。结论:四参饮衍生方联合阿替洛尔治疗快速心律失常疗效显著,值得临床推广。

关键词：心律失常四参饮衍生方阿替洛尔临床研究

Polarity-induced persistent surface reconstruction in SrRuO3(111) thin films

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Polarity-induced persistent surface reconstruction in SrRuO3...

A new non-destructive readout by using photo-recovered surface potential contrast

中国晶体学会第六届学术年会暨会员代表大会——多晶（粉晶）衍射分会

作者： Weimei Xie M.Saghayezhian M.Q.Gu Chen Chen Hangwen Guo X.S. Wu E.W.Plummer jiandi zhang Collaborative Innovation Center of Advanced Microstructures Lab of Solid State Microstructures School of Physics Nanjing University Dept.of Physics & Astronomy Louisiana State University

The surface structural and electronic properties of SrRuO/SrTiO(111)as function of the film thickness are *** the film thickness is more than 2 unit cell(u.c),a persistent surface reconstruction is observed with both Low energy and reflection high energy electron *** reconstruction is associated with the ordered oxygen vacancies on SrO

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A new non-destructive readout by using photo-recovered surfa...

Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel

第十一届全国光学前沿问题讨论会

作者： WANG Le JIN Kuijuan GU Junxing MA Chao HE Xu zhang jiandi WANG Can FENG Yu WAN Qian SHI Jin'an GU Lin HE Meng LU Huibin YANG Guozhen Institute of Physics Chinese Academy of Sciences Collaborative Innovation Center of Quantum Matter Department of Physics and Astronomy Louisiana State University

＜正＞Ferroelectric random access memory is still challenging in the feature of combination of room temperature stability,non-destructive readout and high intensity *** introducing a laser beam into the combination of...

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 504-514页

作者： Lou zhang Shuo Li Fu Tang Jingkai zhang Yuetong Kang Hean zhang Lidong Li State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Silver nanoparticles(Ag NPs)have attracted attention in the field of biomaterials due to their excellent antibacterial ***,the reducing and stabilizing agents used for the chemical reduction of Ag NPs are usually toxic and may cause water *** this work,Ag NPs(31.2 nm in diameter)were prepared using the extract of straw,an agricultural waste,as the reducing and stabilizing *** analysis revealed that the straw extract contained lignin,the structure of which possesses phenolic hydroxyl and methoxy groups that facilitate the reduction of silver salts into Ag *** surfaces of Ag NPs were negatively charged due to the encapsulation of a thin layer of lignin molecules that prevented their *** the prepared Ag NPs were added to the precursor solution of acrylamide,free radical polymerization was triggered without the need for extra heating or light irradiation,resulting in the rapid formation of an Ag NP-polyacrylamide composite *** inhibition zone test proved that the composite hydrogel possessed excellent antibacterial ability due to the presence of Ag *** prepared hydrogel may have potential applications in the fabrication of biomedical materials,such as antibacterial dressings.

关键词： silver nanoparticles hydrogel straw extraction antibacterial