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Edge supercurrent in Josephson junctions based on topological materials

Science china(Physics,Mechanics & Astronomy) 2025年第2期68卷 1-12页

作者： Junjie Qi chui-Zhen chen Juntao Song Jie Liu ke He Qing-Feng Sun X.c.Xie beijing Academy of Quantum Information Sciences Beijing 100193China School of Physical Science and Technology Soochow UniversitySuzhou 215006China Institute for Advanced Study Soochow UniversitySuzhou 215006China college of Physics and Hebei Advanced Thin Films Laboratory Hebei Normal UniversityShijiazhuang 050024China School of Physics Xi’an Jiaotong UniversityMinistry of Education Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed MatterXi’an 710049China State key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Frontier Science center for Quantum Information Beijing 100084China Hefei National Laboratory Hefei 230088China International center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China Interdisciplinary center for Theoretical Physics and Information Sciences Fudan UniversityShanghai 200433China

The interplay between novel topological states and superconductivity has garnered substantial interest due to its potential for topological quantum *** Josephson effect serves as a useful probe for edge superconductivity in these hybrid topological *** Josephson junctions based on topological materials,supercurrents exhibit unique quantum interference patterns,including the conventional Fraunhofer oscillations,theΦ_(0)-periodic oscillation,and the 2Φ_(0)-periodic oscillation in response to the external magnetic field(Φ_(0)=h/2e is the flux quantum,h the Planck constant,and e the electron charge).These interference patterns stem from varied Andreev reflection mechanisms and the associated current density *** review seeks to comprehensively examine the theoretical and experimental advancements in understanding the quantum interference patterns of edge supercurrents in Josephson junctions based on quantum spin Hall,quantum Hall,and quantum anomalous Hall systems.

关键词： quantum Hall effect quantum spin Hall effect quantum anomalous Hall effect Josephson junction edge supercurrent Andreev reflection

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Stability and Stabilization of Sampled-Data based LFc for Power Systems:A Data-Driven Method

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IEEE/cAA Journal of Automatica Sinica 2025年第1期12卷 291-293页

作者： Yu-Long Fan chuan-ke Zhang Yong He the School of Automation China University of Geosciences the Hubei key Laboratory of Advanced control and Intelligent Automation for complex Systems the Engineering Research center of Intelligent Technology for Geo-Exploration Ministry of Education IEEE

Dear Editor,This letter is concerned with stability analysis and stabilization design for sampled-data based load frequency control(LFc) systems via a data-driven method. by describing the dynamic behavior of LFc systems based on a data-based representation, a stability criterion is derived to obtain the admissible maximum sampling interval(MSI) for a given controller and a design condition of the PI-type controller is further developed to meet the required MSI. Finally, the effectiveness of the proposed methods is verified by a case study.

关键词： Sampled data control systems

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Is the Gum Nebula an important interstellar scattering disk of background pulsars?

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Science china(Physics,Mechanics & Astronomy) 2025年第3期Mechanics & Astronomy) .卷 179-190页

作者： Rui Wang Zhen Yan Zhiqiang Shen ke Jia Lee Yajun Wu Rongbing Zhao Zhipeng Huang Xiaowei Wang Jie Liu Shanghai Astronomical Observatory Chinese Academy of Sciences School of Astronomy and Space Sciences University of Chinese Academy of Sciences key Laboratory of Radio Astronomy and Technology Chinese Academy of Sciences School of Physical Science and Technology Shanghai Tech University Department of Astronomy School of Physics Peking University Kavli Institute for Astronomy and Astrophysics Peking University Department of Physics and Astronomy Hubei University of Education

The Gum Nebula is a faint supernova remnant extending about 40° across the southern sky, potentially affecting tens of background pulsars. Though the view that the Gum Nebula acts as a potential scattering screen for background pulsars has been recurrently mentioned over the past five decades, it has not been directly confirmed. We chose the strong background pulsar PSR b0740-28 as a probe and monitored its diffractive interstellar scintillation（DISS） at 2.25 & 8.60 GHz simultaneously for about two years using the Shanghai Tian Ma Radio Telescope（TMRT）. DISS was detected at both frequencies and quantified by two-dimensional autocorrelation analysis. We calculated their scattering spectral index α and found that 9/21 of the observations followed the theoretical predictions, while 4/21 of them clearly showed α cattering along the pulsar line of sight, due to the large frequency lever arm and the simultaneous features of our dual-frequency observations. In comparison to the 2.25 GHz observations, scintillation arcs were observed in 10/21 of the secondary spectrum plots for 8.60 GHz observations. consequently, the highest frequency record for pulsar scintillation arc detection was updated to 8.60 GHz. Our fitting results were the most direct evidence for the view that the Gum Nebula acts as the scattering screen for background pulsars, because both the distance(245-72+69pc) and transverse speed(22.4-4.2+4.1km s-1) of the scintillation screen are comparable with related parameters of the Gum Nebula. Our findings indicated that anisotropic scattering provides a superior explanation for the annual modulation of scintillation arcs than isotropic scattering. Additionally, the orientation of its long axis was also fitted.

关键词： pulsar interstellar scintillation Gum Nebula

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Systematic review of amyloid-beta clearance proteins from the brain to the periphery:implications for Alzheimer's disease diagnosis and therapeutic targets

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Neural Regeneration Research 2025年第12期20卷 3574-3590页

作者： Letian Huang Mingyue Liu Ze Li bing Li Jiahe Wang ke Zhang Department of Oncology Shengjing Hospital of China Medical UniversityShenyangLiaoning ProvinceChina Department of Developmental cell biology Key Laboratory of Cell BiologyMinistry of Public HealthChina Medical UniversityShenyangLiaoning ProvinceChina Department of Family Medicine Shengjing Hospital of China Medical UniversityShenyangLiaoning ProvinceChina

Amyloid-beta clearance plays a key role in the pathogenesis of Alzheimer's disease.H oweve r,the variation in functional proteins involved in amyloid-beta clearance and their correlation with amyloid-beta levels remain unclea *** this study,we conducted meta-analyses and a systematic review using studies from the PubMed,Embase,Web of Science,and cochrane Library databases,including journal articles published from inception to J une 30,*** inclusion criteria included studies comparing the levels of functional proteins associated with amyloid-beta clearance in the blood,cere b rospinal fluid,and brain of healthy controls,patients with mild cognitive impairment,and patients with Alzheimer's ***,we analyzed the correlation between these functional proteins and amyloid-beta levels in patients with Alzheimer's *** methodological quality of the studies was assessed via the Newcastle-Ottawa *** to heterogeneity,we utilized either a fixed-effect or random-effect model to assess the 95%confidence interval(cI)of the standard mean difference(SMD)among healthy controls,patients with mild cognitive impairment,and patients with Alzheimer's *** findings revealed significant alterations in the levels of insulin-degrading enzymes,neprilysin,matrix metalloproteinase-9,cathepsin D,receptor for advanced glycation end products,and P-glycoprotein in the brains of patients with Alzheimer's disease,patients with mild cognitive impairment,and healthy *** cerebrospinal fluid,the levels of triggering receptor expressed on myeloid cells 2 and ubiquitin c-terminal hydrolase L1 are altered,whereas the levels of TREM2,cD40,cD40L,cD14,cD22,cathepsin D,cystatin c,andα2 M in peripheral blood ***,TREM2 and cathepsin D showed changes in both brain(SMD=0.31,95%cI:0.16-0.47,PcI:0.01-2.48,P=0.048,I^(2)=90.1%)and peripheral blood(SMD=1.01,95%cI:0.35-1.66,P=0.003,I^(2)=96.5%;SMD=7.55,95%cI:3.92-11.18,P<0.001,I^(

关键词： Alzheimer’s disease amyloid-β blood‒brain barrier cerebrospinal fluid diagnostic biomarker meta-analysis mild cognitive impairment peripheral blood systematic review therapeutic targets

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clinical significance of Ki-67 in patients with lung adenocarcinoma in situ complicated by type 2 diabetes

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World Journal of Diabetes 2025年第2期16卷 114-122页

作者： ke chen Ge Wang Jing-cheng Hu Ying-Yi Zhou Hai-Tao Ma Department of Thoracic Surgery The First Affiliated Hospital of Soochow UniversitySuzhou 215000Jiangsu ProvinceChina Department of Endocrine The First Affiliated Hospital of Soochow UniversitySuzhou 215000Jiangsu ProvinceChina

bAcKGROUND The increasing number of type 2 diabetes mellitus(T2DM)patients leads to higher rates of morbidity and mortality related to lung *** To investigate the utility of the proliferating cell nuclear antigen Ki-67 in patients with lung adenocarcinoma in situ(AIS)complicated by *** One hundred patients with AIS and T2DM(group A),100 patients with AIS alone(group b),and 60 patients with benign lung lesions(group c)admitted to the Department of Thoracic Surgery and Endocrinology of the First Affiliated Hospital of Soochow University from November 2021 to December 2022 were ***-67 expression was compared among the *** Group A had significantly higher levels of fasting plasma glucose(FPG),total cholesterol(Tc),total triglyceride,low-density lipoprotein cholesterol,glycosylated hemoglobin(HbA1c),and insulin than groups b and c(Pb had higher insulin levels than group c(Pbited a significantly higher average Ki-67 positivity rate than group b(Pb was 77%.Ki-67 was positively correlated with FPG(PbA1c levels(PbG,insulin,HbA1c,high-density lipoprotein cholesterol and Tc were independent factors for patients with AIS complicated by *** K et ***67 in patients with AIS complicated by T2DM WJD https://*** 2 February 15,2025 Volume 16 Issue 2 cONcLUSION Ki-67 expression was higher in patients with AIS complicated by T2DM than in patients with AIS ***,detecting the Ki-67 level might assist in the diagnosis of AIS in patients with T2DM.

关键词： Ki-67 Type 2 diabetes mellitus Lung adenocarcinoma in situ Immunohistochemistry Prognostic marker

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Some fundamental issues in buoyancy-driven flows with implications for geophysical and astrophysical systems

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Acta Mechanica Sinica 2025年第1期41卷 1-21页

作者： ke-Qing Xia Kai Leong chong Guang-Yu Ding Lu Zhang center for complex Flows and Soft Matter Research Southern University of Science and TechnologyShenzhen 518055China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055China Shanghai key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China

buoyancy-driven flows are prevalent in a wide range of geophysical and astrophysical systems. In this review, we focus on threepivotal effects that significantly influence the dynamics and transport properties of buoyancy-driven flows and may have impli-cations for natural systems. These effects pertain to the role of boundary conditions, the impact of rotation, and the effect offinite size. boundary conditions represent how the fluid flow interacts with different kinds of surfaces. Rotation, as the Earth’srotation in geophysical systems or the whirling of astrophysical systems, introduces coriolis and centrifugal forces, leading tothe profound vortical structure and distinct transport property. Finite size, representing geometrical constraints, influences thebehavior of buoyancy-driven flows across varying geometrical settings. This review aims to provide a holistic understanding ofthe intricate interplay of these factors, offering insights into the complex natural phenomena from the perspectives of the threeeffects.

关键词： buoyancy-driven flows Geophysical turbulence Rayleigh-b´enard convection

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Ecological immunology: do sexual attraction and immunity trade-off through a desaturase?

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INSEcT ScIENcE 2025年第1期32卷 290-300页

作者： Gao, ke van der Heide, Wout Muijderman, Daphne Nichols, Sarah Karwal, carmen Kuperus, Peter Groot, Astrid T. Univ Amsterdam Inst Biodivers & Ecosyst Dynam Amsterdam Netherlands Univ calif San Diego Dept Cell & Dev Biol La Jolla CA USA cornell Univ Dept Neurobiol & Behav Ithaca NY USA Leiden Univ Leiden Netherlands

Given the limited availability of resources in nature, sexual attractiveness may trade off with immunocompetence, as the immunocompetence handicap hypothesis (IcHH) posits. In invertebrates, a direct link between trade-offs through hormonal/molecular effectors in sexual signals and immunity has not been found so far. Here, we assessed how variation in sexual signals affected parasite infection in two sex pheromone selected lines of the moth chloridea virescens: an attractive line with a low ratio of 16:Ald/Z11-16:Ald and an unattractive line with a high ratio. When infecting these lines with an apicomplexan parasite, we found that the attractive Low line was significantly more susceptible to the parasite infection than the unattractive High line. Since the ratio difference between these two lines is determined by a delta-11-desturase, we hypothesized that this desaturase may have a dual role, i.e., in the quality of the sexual signal as well as an involvement in immune response, comparable to testosterone in vertebrates. However, when we used cRISPR/cas9 to knockout delta-11-desturase in the attractive Low line, we found that the pheromonal phenotype did change to that of the High line, but the infection susceptibility did not. Notably, when checking the genomic location of delta-11-desaturase in the c. virescens, we found that mucin is adjacent to delta-11-desaturase. When comparing the mucin sequences in both lines, we found four nonsynonymous SNPs in the coding sequence, as well as intronic variation between the two lines. These differences suggest that genetic hitchhiking may explain the variation in susceptibility to parasitic infection.

关键词： chloridea virescens delta-11-desaturase IcHH parasite susceptibility sex pheromone

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HTEc foot:A novel foot structure for humanoid robots combining static stability and dynamic adaptability

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Defence Technology(防务技术) 2025年第2期44卷 30-51页

作者： Jintao Zhang Xuechao chen Zhangguo Yu Lianqiang Han Zhifa Gao Qingrui Zhao Gao Huang ke Li Qiang Huang School of Mechatronical Engineering Beijing Institute of TechnologyNo.5South StreetZhongguancunHaidian DistrictBeijing100081China key Laboratory of biomimetic Robots and Systems Ministry of EducationNo.5South StreetZhongguancunHaidian DistrictBeijing100081China School of Information Science and Technology Beijing University of TechnologyNo.100PingleyuanChaoyang DistrictBeijing100124China Innovation center for control Actuators Beijing Institute of Precision Mechatronics and ControlsDonggaodiFengtai DistrictBeijing100076China

Passive bionic feet,known for their human-like compliance,have garnered attention for their potential to achieve notable environmental *** this paper,a method was proposed to unifying passive bionic feet static supporting stability and dynamic terrain adaptability through the utilization of the Rigid-Elastic Hybrid(REH)dynamics ***,a bionic foot model,named the Hinge Tension Elastic complex(HTEc)model,was developed by extracting key features from human ***,the kinematics and REH dynamics of the HTEc model were *** on the foot dynamics,a nonlinear optimization method for stiffness matching(NOSM)was ***,the HTEc-based foot was constructed and applied onto bHR-b2 humanoid *** foot static stability is *** enhanced adaptability is observed as the robot traverses square steel,lawn,and cobblestone *** proposed design method and structure,the mobility of the humanoid robot is improved.

关键词： Humanoid robot bionic structure Passive foot structure Rigid-elastic hybrid dynamics model Optimal stiffness matching

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Enhancement of bending toughness for Fe-based amorphous nanocrystalline alloy with deep cryogenic-cycling treatment

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china Foundry 2025年第1期22卷 99-107页

作者： Yi-ran Zhang Dong Yang Qing-chun Xiang Hong-yu Liu Jing Pang Ying-lei Ren Xiao-yu Li ke-qiang Qiu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Qingdao Yunlu Advanced Material Technology co. Ltd.Qingdao 266232ShandongChina

The effects of deep cryogenic-cycling treatment(DcT)on the mechanical properties,soft magnetic properties,and atomic scale structure of the Fe_(73.5)Si_(13.5)b_(9)Nb_(3)cu_(1)amorphous nanocrystalline alloy were *** DcT samples were obtained by subjecting the as-annealed samples to a thermal cycling process between the temperature of the supercooled liquid zone and the temperature of liquid *** flat plate bending testing,hardness measurements,and nanoindentation experiment,it is found that the bending toughness of the DcT samples is improved and the soft magnetic properties are also slightly *** are attributed to the rejuvenation behavior of the DcT samples,which demonstrate a higher enthalpy of ***,DcT is an effective method to enhance the bending toughness of Fe-based amorphous nanocrystalline alloys without degrading the soft magnetic properties.

关键词： deep cryogenic-cycling treatment Fe-based amorphous nanocrystalline alloy bending toughness rejuvenation

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Two-dimensional lateral magnetic tunnel junction with ultrahigh tunneling magnetoresistance

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Nano Research 2025年第2期18卷 958-964页

作者： Qiu-Qiu Li Zhi-Fu Duan Wen-Wen Liu Rong Yang bo Li ke-Qiu chen changsha Semiconductor Technology and Application Innovation Research Institute College of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China Department of Applied Physics School of Physics and ElectronicsHunan UniversityChangsha 410082China Research Institute of Hunan University in chongqing Chongqing 401120China Shenzhen Research Institute of Hunan University Shenzhen 518063China

Giant tunneling magnetoresistance(TMR)has always been a pursuit in the research of magnetic tunnel junctions(MTJ).Two-dimensional(2D)magnetic materials have been used to construct lateral MTJ with high *** we investigated the crystal structure and magnetic property of crSI monolayer,and found that it is a ferromagnetic semiconductor with a curie temperature of about 180 *** crSI monolayer with Li adsorption(Li-crSI)show ferromagnetic half-metallic with a high curie temperature of 300 *** we designed a lateral Li crSI/crSI/Li-crSI monolayer *** TMR of the MTJs along b transport direction is 3 orders of magnitude times larger than that of the a transport direction,which should result from the different spin filtering ability along the two *** TMR of b transport direction in the MTJ is 7.67×10^(14),which is significantly higher than that of any reported lateral MTJs based on 2D *** results provide a promising avenue for designing lateral MTJs with giant TMR and high curie temperature.

关键词： two-dimensional materials magnetic tunnel junctions crSI monolayer tunneling magnetoresistance Li atom adsorption

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