检索结果-南通市图书馆

Comparative Analysis of the Mechanisms of Intensified Summer Warming over Europe-West Asia and Northeast Asia since the Mid-1990s through a Process-based Decomposition Method

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2019年第12期36卷 1340-1354页

作者： xueqian sun Shuanglin LI Bo LIU Climate Change Research Center(CCRC) and Nansen-Zhu International Research CentreInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Atmospheric Science China University of GeosciencesWuhan 430074China College of Earth and Planetary Science University of Chinese Academy of SciencesBeijing 100049China

Previous studies have found amplified warming over Europe-West Asia and Northeast Asia in summer since the mid- 1990s relative to elsewhere on the Eurasian continent, but the cause of the amplification in these two regions remains unclear. In this study, we compared the individual contributions of influential factors for amplified warming over these two regions through a quantitative diagnostic analysis based on CFRAM (climate feedback-response analysis method). The changes in surface air temperature are decomposed into the partial changes due to radiative processes (including CO2 concentration, incident solar radiation at the top of the atmosphere, surface albedo, water vapor content, ozone concentration, and clouds) and non-radiative processes (including surface sensible heat flux, surface latent heat flux, and dynamical processes). Our results suggest that the enhanced warming over these two regions is primarily attributable to changes in the radiative processes, which contributed 0.62 and 0.98 K to the region-averaged warming over Europe-West Asia (1.00 K) and Northeast Asia (1.02 K), respectively. Among the radiative processes, the main drivers were clouds, CO2 concentration, and water vapor content. The cloud term alone contributed to the mean amplitude of warming by 0.40 and 0.85 K in Europe-West Asia and Northeast Asia, respectively. In comparison, the non-radiative processes made a much weaker contribution due to the combined impact of surface sensible heat flux, surface latent heat flux, and dynamical processes, accounting for only 0.38 K for the warming in Europe-West Asia and 0.05 K for the warming in Northeast Asia. The resemblance between the influential factors for the amplified warming in these two separate regions implies a common dynamical origin. Thus, this validates the possibility that they originate from the Silk Road pattern.

关键词： CFRAM(climate feedback-response analysis method) amplified summer warming radiative processes nonradiative processes

Two-dimensional materials for light emitting applications:Achievement,challenge and future perspectives

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第6期14卷 1912-1936页

作者： Yi Zhu xueqian sun Yilin Tang Lan Fu Yuerui Lu Engineering and Computer Science the Australian National UniversityCanberraACT2601Australia Department of Electronic Materials Engineering Research School of Physics and Engineeringthe Australian National UniversityCanberraACT2601Australia

The two-dimensional(2D)materials have been widely developed recently in material characteristics with advanced optical and electrical properties,and they have been extensively studied as candidates for the next generation of optoelectronic *** review will mainly focus on the preparation methods and the light emitting applications of 2D transition metal dichalcogenides(TMDs),2D black phosphorene(BP)and 2D *** review will first introduce the preparation methods for TMDs and *** to the variations of band structure,exciton binding energies and light-matter interaction in TMDs and BP,the different light emitting devices(LEDs)designs based on TMDs and BP will be discussed and *** the review will turn the focus to 2D perovskites,starting with a description of the preparation methods for the different structural *** order to review and summarize the achievements of 2D perovskites-based LEDs,the high efficiency perovskites LEDs are ***,the review will present challenges,opportunities,and outlook for the future development of 2D materials-based light emitting applications.

关键词： two-dimensional materials light emitting devices optoelectronic devices perovskite transition metal dichalcogenides(TMDs) perovskite light emitting device(LED)

Simulated Influence of the Atlantic Multidecadal Oscillation on Summer Eurasian Nonuniform Warming since the Mid-1990s

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2019年第8期36卷 811-822页

作者： xueqian sun Shuanglin LI Xiaowei HONG Riyu LU Climate Change Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Atmospheric Science China University of GeosciencesWuhan 430074China 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

Based on ensemble experiments with three atmospheric general circulation models(AGCMs), this study investigates the role of the Atlantic Multidecadal Oscillation(AMO) in shaping the summer nonuniform warming over the Eurasian continent since the mid-1990 s. The results validate that the positive-phase AMO can indeed cause nonuniform warming,with predominant amplified warming over Europe–West Asia and Northeast Asia, but with much weaker warming over Central Asia. The underlying mechanism is then diagnosed from the perspective that the boundary forcing modulates the intrinsic atmospheric variability. The results highlight the role of the Silk Road Pattern(SRP), an intrinsic teleconnection pattern across the subtropical Eurasian continent propagating along the Asian jet. The SRP can not only be identified from the AGCM control experiments with the climatological sea surface temperature(SST), but can also be simulated by the AMO-related SST anomaly(SSTA) forcing. Furthermore, diagnostic linear baroclinic model experiments are conducted, and the results suggest that the SRP can be triggered by the AMO-related tropical diabatic heating. The AMO-triggered SRP-like responses feature anticyclonic circulations over Europe–West Asia and Northeast Asia, but cyclonic circulation over Central Asia. These responses cause increased warm advection towards Europe–West Asia and Northeast Asia, reduced precipitation and cloud cover, and then increased downward shortwave radiation. This increased warm advection and increased downward shortwave radiation together cause amplified warming in Europe–West Asia and Northeast Asia. The situation is opposite for Central Asia.

关键词： Atlantic Multidecadal Oscillation nonuniform warming Silk Road Pattern

Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan Chen Xiu-Qing Qiao Guo Hui Bojing sun Dongfang Hou Meidi Wang xueqian Wu Tao Wu Dong-Sheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Hubei Three Gorges Laboratory College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry Jinan University

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction,Schottky junction,and photothermal *** difference in atomic configuration between cubic-CdS （c-CdS） and hexagonal-CdS （h-CdS） leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge ***,the photothermal effect of Mo2C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H2production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.

关键词： Heterojunctions LSPR Photocatalyst Phase junction Schottky junction Photothermal effect

Aldh2 deficiency plays a dual role in lung tumorigenesis and tumor progression

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第3期11卷 144-147页

作者： Hongjia Zhang xueqian sun Zhanming Li Tingting Liu Fang Zhang Xinyu Meng Kaimi Li Jianhua Xu Wei He Bo Jing Tong Wang Na Ni Beibei sun Feng Yao Yadi Wu Qi Wang Jing Du Eugene Y.Chin Binhua P.Zhou Ping Jiang Lishun Wang Jiong Deng Key Laboratory of Cell Differentiation and Apoptosis of Chinese Minister of Education Department of PathophysiologyShanghai Jiao Tong University School of MedicineShanghai 200025China Shanghai Key Laboratory for Tumor Microenvironment and Inflammation Shanghai Jiao Tong University School of MedicineShanghai200025China Department of Pathology Kunming Medical UniversityKunmingYunnan 650500China Medical Research Center Binzhou Medical University HospitalBinzhouShandong 256600China Center for Traditional Chinese Medicine and Gut Microbiota Minhang HospitalFudan UniversityShanghai 201100China Department of Radiation Oncology Yantai Affiliated Hospital of Binzhou Medical UniversityYantaiShandong 264100China Department of Pathology Molecular Pathology Research CenterPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of Laboratory Medicine Shanghai Pulmonary Hospital Affiliated Tongji UniversityShanghai 200080China Department of Physiology School of Basic Medical SciencesWeifang Medical UniversityWeifangShandong 261021China Department of Thoracic Surgery Shanghai Chest HospitalShanghai Jiao Tong UniversityShanghai 200030China Department of Molecular and Celular Biochemistry Markey Cancer CenterUniversity of Kentucky College of MedicineLexingtonKY40506USA Department of Respiratory Medicine The Second Affiliated HospitalDalian Medical UniversityDalianLiaoning116023China Peninsular Cancer Center Binzhou Medical UniversityYantaiShandong 264003China

Alcohol consumption contributes to global mortality and cancer ***(ACE),the oxidized metabolite of alcohol,is highly reactive towards DNA,resulting in DNA *** can be detoxified to acetate by acetaldehyde dehydrogenase... 详细信息

关键词： mortality damage ALDH2

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

多基原中药质量评价研究进展

中草药 2024年第12期55卷 4214-4224页

作者：孙雪倩杨彬李遇伯天津中医药大学中药学院天津301617

多基原中药质量评价是保障其临床用药有效性和安全性的重要环节。目前,多基原中药质量评价仍存在基原鉴定方法专属性较差,多基原中药品种间药效和毒性物质基础不明确,有效性、安全性数据缺乏等问题。近年来,围绕多基原中药质量评价涌现... 详细信息

多基原中药质量评价是保障其临床用药有效性和安全性的重要环节。目前,多基原中药质量评价仍存在基原鉴定方法专属性较差,多基原中药品种间药效和毒性物质基础不明确,有效性、安全性数据缺乏等问题。近年来,围绕多基原中药质量评价涌现出许多新思路、新模式及新方法。在整理《中国药典》2020年版收载的多基原中药概况的基础上,对多基原中药基原鉴定及质量评价新思路、新方法进行综述。为完善多基原中药质量评价体系,保障多基原中药临床用药的有效性和安全性提供支持。

关键词：多基原中药质量评价有效性安全性基原鉴定

在线全文

学校读者我要写书评

暂无评论

可变智能桁架在大口径光学望远镜中的应用

红外与激光工程 2021年第10期50卷 32-44页

作者：王瑞王富国孙雪倩安其昌中国科学院长春光学精密机械与物理研究所吉林长春130033 中国科学院大学北京100049

可变智能桁架在光学设备装调与在轨组装与维护等方面均有着巨大的优势,针对可变智能桁架在大口径光学设备上的相关技术及应用进行了归纳总结,并对其未来发展趋势进行了展望。首先,针对少自由度串联构型的桁架论述了关于望远镜嵌合式可... 详细信息

可变智能桁架在光学设备装调与在轨组装与维护等方面均有着巨大的优势,针对可变智能桁架在大口径光学设备上的相关技术及应用进行了归纳总结,并对其未来发展趋势进行了展望。首先,针对少自由度串联构型的桁架论述了关于望远镜嵌合式可变智能桁架设计及其应用;之后,着重介绍了可变智能桁架在望远镜在轨组装、调节以及在轨服务中的应用。针对其自由度与定位精度高的特点,总结了智能桁架调节时可使用的反馈方法并对可变智能桁架的结构与控制算法进行了论述;最后,对目前应用于智能桁架的技术进行了总结,并对未来的发展趋势进行了展望。

关键词：大口径望远镜在轨装调可变智能桁架计算机辅助装调反馈方法

北大西洋多年代际振荡正、负位相期间欧亚夏季副热带波列季节内活动特征及与印度降水的联系

在线全文

学校读者我要写书评

暂无评论

大气科学 2018年第5期42卷 1067-1080页

作者：孙雪倩李双林孙即霖洪晓玮中国科学院大气物理研究所/中国科学院气候变化研究中心北京100029 中国海洋大学海洋与大气学院青岛266100 中国科学院大学地球与行星科学学院北京100049 中国地质大学大气科学系武汉430074

利用美国国家环境预测中心与国家大气研究中心(NCEP/NCAR)逐日再分析资料,针对北大西洋多年代际振荡(AMO)两个不同位相,对逐候200 h Pa经向风异常进行EOF分析,发现在AMO正、负位相期间,欧亚副热带波列的季节内活动存在明显差异。利用超... 详细信息

利用美国国家环境预测中心与国家大气研究中心(NCEP/NCAR)逐日再分析资料,针对北大西洋多年代际振荡(AMO)两个不同位相,对逐候200 h Pa经向风异常进行EOF分析,发现在AMO正、负位相期间,欧亚副热带波列的季节内活动存在明显差异。利用超前—滞后回归,对比了不同AMO位相下副热带波列及其相联系的印度夏季降水的季节内活动演变特征,分析有关的大气环流,探究波列影响降水的机制。结果表明:在AMO负位相期间,由格陵兰岛以南北大西洋经大不列颠岛、地中海、黑海—里海向南亚北部传播的副热带波列的季节内演变,在印度中部引起下沉,导致中部及西北部季节内降水减少,波列负位相相反;在AMO正位相期间,副热带波列西起冰岛以南北大西洋经丹麦南部、俄罗斯西部、中亚向南亚东北部传播,对应该波列的季节内演变,辐合上升区在印度中部和东西两侧,使得该区域季节内降水增加,波列负位相相反。于是,AMO通过调制夏季欧亚副热带波列的季节内活动,可以对印度夏季降水的季节内变化空间型及演变发挥显著影响。

关键词：北大西洋多年代际振荡波列季节内变化印度夏季降水

适应高原天气与地形的人工增雨无人机研制及试验

在线全文

学校读者我要写书评

暂无评论

农业工程学报 2017年第15期33卷 105-111页

作者：马学谦孙安平张小军韩辉邦青海省人工影响天气办公室西宁810001 青海省气象局西宁810001

人工增雨作业是开发空中云水资源的有效手段,常规作业方式因安全性和空域因素受到一定的限制,研制一种适合高原天气、复杂地形和气候特征的长航程、大载荷等功能于一体的无人增雨飞机势在必行。该文以LY-Z200原型机为雏形,通过改变起降... 详细信息

人工增雨作业是开发空中云水资源的有效手段,常规作业方式因安全性和空域因素受到一定的限制,研制一种适合高原天气、复杂地形和气候特征的长航程、大载荷等功能于一体的无人增雨飞机势在必行。该文以LY-Z200原型机为雏形,通过改变起降方式、调整发动机功率和位置、加装除冰器件,提高无人机的飞行高度和安全程度,并安装大气常规探测仪器、设计小型化的增雨播撒系统、增加航拍仪器等功能扩充无人机的使用范围,从而研制出适合高原的LY-ZY200型人工增雨无人机。经多架次试验结果表明:该无人机飞行高度达6 100 m,起飞质量达171 kg,有效载荷50 kg,加油量达42 L,最大油耗为7.2 L/h,巡航速度达187.2 km/h,巡航时间长达4 h,满足高原地区实施大范围人工增雨的任务载荷量和航程需求,并能携带10根催化烟条在-4℃以下低温云区实现空地信息互通、人工增雨作业和多样化的任务需求。高原人工增雨试验表明该无人机能够穿越较厚的云层和复杂的云内环境,实现平稳飞行和增雨催化剂的规划点播撒,催化后能够直观地反映出增加了地面有效降水。该无人机可以实现人工增雨中适当作业位置、适当作业时机开展适当播撒作业任务要求,为人工影响天气开辟了比较理想的作业方式和探测工具。

关键词：无人机控制试验高原增雨