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Interannual Meridional Displacement of the Upper-Tropospheric Westerly Jet over Western East Asia in Summer

Advances in Atmospheric Sciences 2023年第7期40卷 1298-1308页

作者： Sining LING Riyu LU Hao LIU yali yang State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Atmospheric Sciences Yunnan UniversityKunming 650504China

The interannual meridional displacement of the upper-tropospheric westerly jet over the eastern portion of East Asia in summer has been well documented.This study,however,investigates the interannual meridional displacement of the westerly jet over the western portion of East Asia in summer,which is distinct from its eastern counterpart.The results show that the meridional displacement of the western East Asian jet shows a clear asymmetric feature;that is,there are remarkable differences between the southward and northward displacement of the jet.The southward displacement of the jet corresponds to suppressed convection in the tropical western North Pacific and Maritime Continent and enhanced convection in the equatorial Pacific,which can be explained by the warmer sea surfaces found in the northern Indian Ocean and equatorial eastern Pacific.These tropical anomalies somewhat resemble those associated with the eastern East Asian jet variability.However,the northward displacement of the western East Asian jet does not correspond to significant convection and SST anomalies in the entire tropics;instead,the northward displacement of the jet corresponds well to the positive phase of the Arctic Oscillation.Furthermore,the meridional displacement of the western jet has asymmetric impacts on rainfall and surface air temperatures in East Asia.When the western jet shifts northward,more precipitation is found over South China and Northeast China,and higher temperatures appear in northern China.By contrast,when the jet shifts southward,more precipitation appears over the East Asian rainy belt,including the yangtze River valley,South Korea,and southern and central Japan and warmer temperatures are found South and Southeast Asia.

关键词： westerly jet East Asia tropical convection Arctic Oscillation summer

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Light-induced magnetic phase transition in van der Waals antiferromagnets

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Science China(Physics,Mechanics & Astronomy) 2023年第7期66卷 136-141页

作者： Jiabin Chen yang Li Hongyu Yu yali yang Heng Jin Bing Huang Hongjun Xiang Key Laboratory of Computational Physical Sciences(Ministry of Education) Institute of Computational Physical SciencesState Key Laboratory of Surface PhysicsDepartment of PhysicsFudan UniversityShanghai 200433China Shanghai Qi Zhi Institute Shanghai 200030China Beijing Computational Science Research Center Beijing 100193China Department of Physics Beijing Normal UniversityBeijing 100193China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

Control over magnetic properties by optical stimulation is not only interesting from the physics point of view,but also important for practical applications such as magneto-optical devices.Here,based on a simple tight-binding(TB)model,we propose a general theory of light-induced magnetic phase transition(MPT)in antiferromagnets.Considering the fact that the bandgap of the antiferromagnetic(AFM)phase is usually larger than that of the ferromagnetic(FM)one for a given system,we suggest that light-induced electronic excitation prefers to stabilize the FM state over the AFM one,and will induce an MPT from AFM phase to FM phase once a critical photocarrier concentration(αc)is reached.This theory has been confirmed by performing firstprinciples calculations on a series of 2D van der Waals(vd W)antiferromagnets.Interestingly,a linear relationship betweenαc and the intrinsic material parameters is obtained,in agreement with our TB model analysis.Our general theory paves a new way to manipulate 2D magnetism with high speed and superior resolution.

关键词： first-principles calculation density functional theory two-dimensional materials magnetic phase transition

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CDK5 inhibition promotes osteoblastic differentiation of MSCs and blocks the migration of osteosarcoma MG-63 cells

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BIOCELL 2022年第4期46卷 1067-1078页

作者： HONG FU HAOYU ZHAO yali yang SIYU WANG KE DUAN TAILIN GUO College of Medicine Southwest Jiaotong UniversityChengdu610031China Provincial Laboratory of Orthopaedic Engineering Department of Bone and Joint SurgeryAffiliated Hospital of Southwest Medical UniversityLuzhou646000China

CDK5 belongs to the cyclin-dependent kinase family.CDK5 is multifunctional and plays an important role in neural differentiation.However,the role of CDK5 in osteoblastic differentiation remains unclear.The present study investigated functions and molecular mechanism of CDK5 in osteoblastic differentiation.It was found that,CDK5 inhibition promoted the expression of Runx2,ALP,OCN and OPN of MSCs and the mineralization of MC-3T3E1 cells and MSCs.CDK5 inhibition enhanced the development of F-actin,nuclear localization ofβ-catenin and YAP,as well as the expression of RMRP RNA.When F-actin was suppressed by Blebbistatin,the nuclear localization of YAP andβ-catenin,and expression of RMRP RNA as well as Runx2 and ALP were decreased.These indicate Seliciclib promotes osteoblastic differentiation mainly by F-actin.Moreover,Seliciclib also suppressed the migration of MG-63,suggesting a potential application for Seliciclib in bone defect repair and inhibition of the migration of osteosarcoma cells after osteosarcoma surgical resection.

关键词： F-actin YAP Beta-catenin Nuclear localization MSC differentiation

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Building Better Full Manganese‑Based Cathode Materialsfor Next‑Generation Lithium‑Ion Batteries

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Electrochemical Energy Reviews 2023年第1期6卷 148-185页

作者： Jin Song Hangchao Wang Yuxuan Zuo Kun Zhang Tonghuan yang yali yang Chuan Gao Tao Chen Guang Feng Zewen Jiang Wukun Xiao Tie Luo Dingguo Xia Beijing Key Laboratory of Theory and Technology for Advanced Battery Materials School of Materials Science and EngineeringPeking UniversityBeijing 100871China College of Chemistry and Molecular Science Wuhan UniversityWuhan 430072HubeiChina College of Engineering Peking UniversityBeijing 100871China

Lithium-manganese-oxides have been exploited as promising cathode materials for many years due to their environmental friendliness,resource abundance and low biotoxicity.Nevertheless,inevitable problems,such as Jahn-Teller distortion,manganese dissolution and phase transition,still frustrate researchers;thus,progress in full manganese-based cathode materials(FMCMs)has been relatively slow and limited in recent decades.Recently,with the fast growth of vehicle electrification and large-scale energy-storage grids,there has been an urgent demand to develop novel FMCMs again;actually,new waves of research based on FMCMs are being created.Herein,we systematically review the history of FMCMs,correctly describe their structures,evaluate the advantages and challenges,and discuss the resolution strategies and latest developments.Additionally,beyond FMCMs,a profound discussion of current controversial issues,such as oxygen redox reaction,voltage decay and voltage hysteresis in Li_(2)MnO_(3)-based cathode materials,is also presented.This review summarizes the effectively optimized approaches and offers a few new possible enhancement methods from the perspective of the electronic-coordination-crystal structure for building better FMCMs for next-generation lithium-ion batteries.

关键词： Energy storage Lithium-ion batteries Cathode materials Manganese oxides

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中欧班列开通是否提升了城市创业活跃度——来自中国地级市的经验证据

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国际贸易问题 2024年第3期 157-174页

作者：顾欣杨亚丽东南大学经济管理学院

中欧班列作为高质量共建“一带一路”的交通纽带和空间载体,不仅提高了开通城市的对外开放水平,也加速了所在区域的要素资源流动,为城市创业活动注入新的动能。本文利用2004—2019年中国工商企业注册数据,构建多期双重差分模型,研究中... 详细信息

中欧班列作为高质量共建“一带一路”的交通纽带和空间载体,不仅提高了开通城市的对外开放水平,也加速了所在区域的要素资源流动,为城市创业活动注入新的动能。本文利用2004—2019年中国工商企业注册数据,构建多期双重差分模型,研究中欧班列开通对城市创业活跃度的影响。结果表明,中欧班列显著促进了开通城市创业活跃度的提升,且经过一系列稳健性检验后结论仍然成立。影响机制在于,中欧班列通过贸易开放效应丰富了创业机会并通过金融发展效应缓解了创业融资约束,从而使开通城市创业活跃度进一步提升。本文补充了中欧班列在城市创业层面经济溢出效应的经验证据,为高质量共建“一带一路”以及加速将中欧班列带来的机遇优势转化为当地的经济优势提供了政策参考。

关键词：中欧班列对外开放交通基础设施创业活跃度

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What is the promising anode material for Na ion batteries?

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Science Bulletin 2018年第3期63卷 146-148页

作者： yangyang Zhou yali yang Menggai Jiao Zhen Zhou School of Materials Science and Engineering National Institute for Advanced Materials Institute of New Energy Material Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University

In the current world,people have ever-increasing demand for energy.Fossil fuels are now the primary source of energy,and their excess use results in severe problems,such as environmental pollution and global warming.Consequently,it is essential to develop a new society based on sustainable energies such as wind,tidal and solar energy sources.Due to the intermittence and instability of the above new energies,smart grids with the core technology

关键词：阳极材料 Na 电池离子过量使用环境污染精力太阳能

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Faulty Feeder Identification and Fault Area Localization in Resonant Grounding System Based on Wavelet Packet and Bayesian Classifier

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Journal of Modern Power Systems and Clean Energy 2020年第4期8卷 760-767页

作者： Jingwen Chen Enliang Chu Yingchun Li Baoji Yun Hongshe Dang yali yang Power System Relay Protection Laboratory of Shaanxi University of Science and Technology Xi’anChina Xi’an Xirui Control Technology Co. Ltd.Xi’anChina State Grid Shaanxi Electric Power Company Maintenance Company Xi’anChina

Accurate fault area localization is a challenging problem in resonant grounding systems(RGSs).Accordingly,this paper proposes a novel two-stage localization method for single-phase earth faults in RGSs.Firstly,a faulty feeder identification algorithm based on a Bayesian classifier is proposed.Three characteristic parameters of the RGS(the energy ratio,impedance factor,and energy spectrum entropy)are calculated based on the zero-sequence current(ZSC)of each feeder using wavelet packet transformations.Then,the values of three parameters are sent to a pre-trained Bayesian classifier to recognize the exact fault mode.With this result,the faulty feeder can be finally identified.To find the exact fault area on the faulty feeder,a localization method based on the similarity comparison of dominant frequency-band waveforms is proposed in an RGS equipped with feeder terminal units(FTUs).The FTUs can provide the information on the ZSC at their locations.Through wavelet-packet transformation,ZSC dominant frequency-band waveforms can be obtained at all FTU points.Similarities of the waveforms of characteristics at all FTU points are calculated and compared.The neighboring FTU points with the maximum diversity are the faulty sections finally determined.The proposed method exhibits higher accuracy in both faulty feeder identification and fault area localization compared to the previous methods.Finally,the effectiveness of the proposed method is validated by comparing simulation and experimental results.

关键词： Resonant grounding system single-phase earth fault faulty feeder identification fault area localization wavelet packet Bayesian classifier

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Antibacteria activities of phenolics from"Jinshiji"thinned-young apple on halitosis-related bacteria

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Food Bioscience 2022年第3期47卷 793-801页

作者： Ting Liu Tian Gong Furong Wang Xueru Zhou yali yang Yurong Guo College of Food Engineering and Nutritional Science Shaanxi Normal UniversityXi'anPR China National Research and Development Center of Apple Processing Technology PR China

This article aims to explain the inhibitory mechanism of thinned-young apple polyphenols(YAP)toward Fusobacterium nucleatum(F.nucleatum),Porphyromonas gingivalis(P.gingivalis)and Prevotella intermedia(P.intermedia).YAP has optimal antibacterial concentration against F.nucleatum(10.00 mg/mL),P.gingivalis(8.00 mg/mL)and P.intermedia(8.00 mg/mL),with viability of 47.97%,38.01%and 36.94%,respectively.Scanning electron microscopy(SEM)and confocal laser scanning microscopy(CLSM)observation revealed that YAP could cause the morphological changes of the halitosis-related bacterial cells and induce cell apoptosis.With the increase of YAP treatment concentrations,the permeability of the outer membranes(OM)and inner membranes(IM)of halitosis-related bacteria dramatically increased,resulting in the release of proteins and nucleic acids.In addition,bacterial cell membrane potential(MP)decreased after exposure to YAP.The results of this study provide new antibacterial agents for halitosis-related bacteria and find a new way for the development of thinned-young apples.

关键词： Thinned-young apple polyphenols Halitosis Cell membrane F.nucleatum P.gingivalis P.intermedia

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纳米抗氧化剂减轻心肌缺血再灌注损伤的研究进展

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中华心血管病杂志 2024年第6期52卷 729-734页

作者：付文佩邓诚李诗莹张丽谢明星杨亚利华中科技大学同济医学院附属协和医院超声医学科武汉430022

心肌缺血再灌注损伤是缺血心肌恢复血流灌注过程中心肌细胞进一步损伤、坏死和凋亡的现象,严重影响冠状动脉血流再通术患者预后。氧化应激是介导心肌缺血再灌注损伤发生发展的重要机制之一,使用抗氧化剂清除活性氧可有效缓解氧化应激、... 详细信息

心肌缺血再灌注损伤是缺血心肌恢复血流灌注过程中心肌细胞进一步损伤、坏死和凋亡的现象,严重影响冠状动脉血流再通术患者预后。氧化应激是介导心肌缺血再灌注损伤发生发展的重要机制之一,使用抗氧化剂清除活性氧可有效缓解氧化应激、减轻心肌缺血再灌注损伤。纳米抗氧化剂是一种新型抗氧化剂,相较于传统抗氧化剂,可改善治疗药物药代动力学和药效学性能,提高治疗效果,减少副作用,具有良好临床应用前景。该文就纳米抗氧化剂在心肌缺血再灌注损伤治疗中的最新研究进展进行综述。

关键词：心肌缺血心肌缺血再灌注损伤纳米抗氧化剂氧化应激活性氧

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水力空化强化碳化反应制备碱式碳酸镁的实验研究

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无机盐工业 2024年第7期56卷 74-79页

作者：杨涵硕王德喜于红蕾杨亚丽姜久闯沈阳工业大学机械工程学院辽宁沈阳110870 沈阳工业大学化工装备学院辽宁辽阳111000

为了强化微观混合和传质,提高Mg(OH)_(2)碳化率,采用水力空化技术强化Mg(OH)_(2)与CO_(2)碳化反应生成中间产物Mg(HCO_(3))_(2),再经过热解制备碱式碳酸镁[4Mg CO_(3)·Mg(OH)_(2)·4H_(2)O],设计正交试验考察Mg(OH)_(2)碳化率的影响因... 详细信息

为了强化微观混合和传质,提高Mg(OH)_(2)碳化率,采用水力空化技术强化Mg(OH)_(2)与CO_(2)碳化反应生成中间产物Mg(HCO_(3))_(2),再经过热解制备碱式碳酸镁[4Mg CO_(3)·Mg(OH)_(2)·4H_(2)O],设计正交试验考察Mg(OH)_(2)碳化率的影响因素。通过扫描电子显微镜、X射线衍射仪和多参数测试仪等对产物进行表征。研究结果表明,Mg(OH)_(2)碳化率影响因素由大到小顺序依次为入射角α、CO_(2)流量q、Mg(OH)_(2)固含量s、入口压力p、喉径d_(0)、碳化时间t。在α=60°、d_(0)=4 mm、p=0.35 MPa、t=60 min、s=1.6%、q=17 L/min的工艺条件下碳化率为92.1%,比鼓泡搅拌反应器的碳化率(60.53%)高31.57%。产物4Mg CO_(3)·Mg(OH)_(2)·4H_(2)O中杂质(如Ca O、Fe)含量降低;制备的4Mg CO_(3)·Mg(OH)_(2)·4H_(2)O呈均匀片状结构,晶体厚度小于50 nm;产品结晶良好,组成相对稳定单一,所得产物的各个衍射峰峰位都与标准六方晶型的碱式碳酸镁衍射峰峰位完全一致。

关键词：水力空化碳化反应碱式碳酸镁水力空化反应器

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