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Effects of Clouds and Aerosols on Surface Radiation Budget Inferred from DOE AMF at Shouxian,China

Atmospheric and Oceanic Science Letters 2013年第1期6卷 39-43页

作者： qiu yu-jun DONG Xi-Quan XI Bai-Ke WANG Zhen-Hui Key Laboratory of Meteorological Disaster of Ministry of Education(KLME) Nanjing University of Information Science & Technology(NUIST) School of Atmospheric Physics NUIST Global Change and Earth System Science(GCESS) Beijing Normal University Department of Atmospheric Sciences University of North DakotaGrand ForksNorth DakotaUSA

Based on data collected during the first U.S. Department of Energy （DOE） Atmospheric Radiation Measurement （ARM） field campaigns at Shouxian, east- ern China in 2008, the effects of clouds and aerosols on the surface radiation budget during the period Octo- ber-December 2008 were studied. The results revealed that the largest longwave （LW）, shortwave （SW）, and net Aerosol Radiative Effects （AREs） are 12.7, -37.6, and -24.9 W rn-2, indicating that aerosols have LW warming impact, a strong SW cooling effect, and a net cooling ef- fect on the surface radiation budget at Shouxian during the study period 15 October-15 December 2008. The SW cloud radiative forcing （CRF） is -135.1 W m-2, much cooler than ARE （about 3.6 times）, however, the LW CRF is 43.6 W m 2, much warmer than ARE, and resulting in a net CRF of-91.5 W m-2, about 3.7 times of net ARE. These results suggest that the clouds have much stronger LW warming effect and SW cooling effect on the surface radiation budget than AREs. The net surface radiation budget is dominated by SW cooling effect for both ARE and CRE. Furthermore, the precipitatable clouds （PCs） have the largest SW cooling effect and LW warming ef- fect, while optically thin high clouds have the smallest cooling effect and LW warming on the surface radiation budget. Comparing the two selected caseds, CloudSat cloud radar reflectivity agrees very well with the AMF （ARM Mobile Facility） WACR （W-band ARM Cloud Radar） measurements, particularly for cirrus cloud case. These result will provide a ground truth to validate the model simulations in the future.

关键词： aerosol clouds. ARE. CRF

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Highly sensitive and stable β-Ga_(2)O_(3) DUV phototransistor with local back-gate structure and its neuromorphic application

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Nano Research 2022年第10期15卷 9359-9367页

作者： Xiao-Xi Li Guang Zeng yu-Chun Li qiu-jun yu Meng-Yang Liu Li-yuan Zhu Wenjun Liu Ying-Guo Yang David Wei Zhang Hong-Liang Lu State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics&SystemsSchool of MicroelectronicsFudan UniversityShanghai 200433China Shanghai Synchrotron Radiation Facility(SSRF) Zhangjiang LabShanghai Advanced Research Institute&Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201204China

Deep ultraviolet(DUV)phototransistors are key integral of optoelectronics bearing a wide spectrum of applications in flame sensor,military detector,oil spill detection,biological sensor,and artificial intelligence *** order to further improve the responsivity of UV photodetectors based onβ-Ga_(2)O_(3),in present work,high-performanceβ-Ga_(2)O_(3) phototransistors with local back-gate structure were experimentally *** phototransistor shows excellent DUV photoelectrical performance with a high responsivity of 1.01×107 A/W,a high external quantum efficiency of 5.02×109%,a sensitive detectivity of 2.98×1015 Jones,and a fast rise time of 0.2 s under 250 nm ***,first-principles calculations reveal the decent stability ofβGa_(2)O_(3) nanosheet against oxidation and humidity without significant performance ***,the hexagonal boron nitride(h-BN)/β-Ga_(2)O_(3) phototransistor can behave as a photonic synapse with ultralow power consumption of~9.6 fJ per spike,which shows its potential for neuromorphic computing tasks such as facial ***β-Ga_(2)O_(3) phototransistor will provide a perspective for the next generation optoelectrical systems.

关键词： β-Ga_(2)O_(3)phototransistors local back-gate responsivity stability photonic synapse

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气候因素对沙尘天气影响的模型研究

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自然灾害学报 2005年第2期14卷 35-40页

作者：邱玉珺邹学勇北京师范大学中国沙漠研究中心

气候因素是影响沙尘天气发生的必要条件,到目前为止,用定量模型研究气候因素对沙尘天气的影响还比较欠缺,针对这一情况,利用风速、降水、蒸发量、相对湿度和大风日数基本气象资料,提出了风速影响指数W和土壤湿度指数H,并给出了相应的指... 详细信息

气候因素是影响沙尘天气发生的必要条件,到目前为止,用定量模型研究气候因素对沙尘天气的影响还比较欠缺,针对这一情况,利用风速、降水、蒸发量、相对湿度和大风日数基本气象资料,提出了风速影响指数W和土壤湿度指数H,并给出了相应的指标计算方法,在此基础上建立了影响沙尘天气的气候影响指数D模型。同时选取了北京大兴、怀柔、门头沟、顺义四个区气象台站的气象资料(1961-1990年)进行模型应用,结果表明气候影响指数D和沙尘天气发生频率S有较好的线性相关性,与McTainsh的模型进行对比发现,该模型评价气候因素对沙尘天气影响作用的效果较显著。

关键词：大风日发生率风速影响指数 P-E指数气候影响指数沙尘天气

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沙尘天气发生频率对大气能见度方差的影响研究:以北京及其沙尘过往路径典型站点为例

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环境科学 2006年第6期27卷 1046-1051页

作者：邱玉珺邹学勇张春来北京师范大学中国沙漠研究中心

利用1971～2000年北京及其沙尘过往路径典型站点日能见度和各种沙尘天气发生日资料，分析了沙尘天气发生频率与能见度方差的关系．发现当沙尘天气频率减少（增加）1次时，能见度方差就偏强（偏弱）1个标准差．沙尘天气发生频率对日能见... 详细信息

利用1971～2000年北京及其沙尘过往路径典型站点日能见度和各种沙尘天气发生日资料，分析了沙尘天气发生频率与能见度方差的关系．发现当沙尘天气频率减少（增加）1次时，能见度方差就偏强（偏弱）1个标准差．沙尘天气发生频率对日能见度变率的影响主要是通过风速的高频变率实现的，当风速变率偏强（偏弱）1个标准差时，沙尘天气发生频率增强（减弱）约30％，近地面风场的高频变率影响了沙尘天气的产生，从而影响日能见度方差的波动．异常低能见度事件（日能见度距平〈-2σ，σ为各站各日能见度距平的标准差）频次与能见度方差之间存在显著的正相关性．风速距平频次增加，使得沙尘天气发生频次增加，从而导致低能见度事件频次上升；反之，异常低能见度事件下降．浮尘、沙尘暴和扬沙与低能见度事件的相关稗席是不同的。

关键词：沙尘天气能见度风速方差低能见度事件

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Azolla-A Model Organism for Plant Genomic Studies

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Genomics, Proteomics & Bioinformatics 2003年第1期1卷 15-25页

作者： Yin-Long qiu, jun yu1 Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109-1048, USA 2 Beijing Genomics Institute, Chinese Academy of Scicences, Beijing 101300, China 3 University of Washington Genome Center, Seattle, WA 98195, USA Department of Ecology and Evolutionary Biology University of Michigan Ann Arbor MI 48109-1048 USA. yqiu@bio.umass.edu

The aquatic ferns of the genus Azolla are nitrogen-fixing plants that have great potentials in agricultural production and environmental conservation. Azolla in many aspects is qualified to serve as a model organism for genomic studies because of its importance in agriculture, its unique position in plant evolution, its symbiotic relationship with the N2-fixing cyanobacterium, Anabaena azollae, and its moderate-sized genome. The goals of this genome project are not only to understand the biology of the Azolla genome to promote its applications in biological research and agriculture practice but also to gain critical insights about evolution of plant genomes. Together with the strategic and technical improvement as well as cost reduction of DNA sequencing, the deciphering of their genetic code is imminent.

关键词： Azolla nitrogen fixation genome model organism

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Structural engineering of high-entropy alloys for advanced electrocatalytic reactions

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Tungsten 2025年第1期7卷 1-31页

作者： Qiao Xie Ying-Jie yu Hai-jun Zhang Ya-Ping Deng Wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Department of Chemical Engineering Waterloo Institute for Sustainable Energy Waterloo Institute for Nanotechnology University of Waterloo

High-entropy alloys(HEAs) have emerged as promising candidates to replace traditional precious metal catalysts,owing to their unique chemical and physical *** review commences by revisiting the fundamental concepts of HEAs,including their synthesis methods and structural control strategies in *** underscores the critical role of meticulously manipulating both macroscopic and microscopic structures of the HEAs to optimize their catalytic performance.A deep understanding of the structure-activity relationship in HEAs across various configurations is pivotal in developing more effective *** review methodically encapsulates the research progress of structural control strategies for HEAs in achieving efficient energy conversion,with the aim of gaining a better understanding of the relationship between structure and *** review concludes by summarizing the current achievements and challenges,and suggestions for potential future directions of HEAs in the fields of energy conversion and environmental purification.

关键词： Electrocatalytic Energy conversion High-entropy alloys Structural modulation

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Nanograting‑Based Dynamic Structural Colors Using Heterogeneous Materials

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Nano-Micro Letters 2025年第3期17卷 138-151页

作者： Jingang Wang Haibo yu Jianchen Zheng yuzhao Zhang Hongji Guo Ye qiu Xiaoduo Wang Yongliang Yang Lianqing Liu State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Dynamic structuralcolors can change in response todifferent environmental *** ability remains effectiveeven when the size of the speciesresponsible for the structural coloris reduced to a few micrometers,providing a promising sensingmechanism for solving microenvironmentalsensing problems inmicro-robotics and ***, the lack of dynamicstructural colors that can encoderapidly, easily integrate, and accuratelyreflect changes in physical quantities hinders their use in microscale sensing applications. Herein, we present a 2.5-dimensionaldynamic structural color based on nanogratings of heterogeneous materials, which were obtained by interweaving a pH-responsive hydrogelwith an IP-L photoresist. Transverse gratings printed with pH-responsive hydrogels elongated the period of longitudinal grating in the swollenstate, resulting in pH-tuned structural colors at a 45° incidence. Moreover, the patterned encoding and array printing of dynamic structuralcolors were achieved using grayscale stripe images to accurately encode the periods and heights of the nanogrid structures. Overall, dynamicstructural color networks exhibit promising potential for applications in information encryption and in situ sensing for microfluidic chips.

关键词： Dynamic structural colors Four-dimensional printing pH-responsive Nanogrid Heterogeneous materials

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半干旱区沙尘天气近地层湍流通量及起沙研究

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中国沙漠 2010年第5期30卷 1194-1199页

作者：周悦牛生杰邱玉珺南京信息工程大学气象灾害省部共建教育部重点实验室/大气物理学院江苏南京210044

利用2005年春季朱日和气象站20m气象塔的观测资料,结合同期的PM10质量浓度资料,分析了半干旱地区不同沙尘天气下近地层湍流通量的变化特征以及PM10质量浓度与起沙之间的关系。结果表明,动量通量在15:00左右达到极大值;感热通量在白天为... 详细信息

利用2005年春季朱日和气象站20m气象塔的观测资料,结合同期的PM10质量浓度资料,分析了半干旱地区不同沙尘天气下近地层湍流通量的变化特征以及PM10质量浓度与起沙之间的关系。结果表明,动量通量在15:00左右达到极大值;感热通量在白天为正值,中午12:00左右达到峰值,而晚上变为负值,并在凌晨达到谷值;由于3月份下垫面湿度大,导致潜热通量经常全天为正值,并在16:00左右达到峰值;PM10质量浓度与摩擦速度的二次方呈正比,临界起沙风速和临界摩擦速度分别为7m·s-1和0.7m·s-1。

关键词：沙尘天气湍流通量动量通量摩擦速度临界摩擦速度

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Personalized federated few-shot node classification

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Science China(Information Sciences) 2025年第1期68卷 204-218页

作者： yunfeng ZHAO Xintong HE Guoxian yu jun WANG Yongqing ZHENG Carlotta DOMENICONI School of Software Shandong University Joint SDU-NTU Centre for Artificial Intelligence Research Shandong University Department of Mathematics National University of Singapore Department of Computer Science George Mason University

Personalized federated learning(PFL) aims to train customized models for individual clients in a decentralized setting, with the account of non-independent and identically distributed data across clients. However, most PFL methods adopt uniform classification layers for diverse clients and give rise to error-prone predictions, due to the task heterogeneity notably prominent in decentralized graph data scenarios. Although some PFL solutions setup client-specific classification layers for each client and optimize them only locally, they are corrupted with limited local training data. We propose an innovative solution called federated parameter decoupling and node augmentation(Fed PANo) to address these problems and to achieve personalized federated few-shot node classification, which is a prevalent and challenging but unexplored topic. Specifically, Fed PANo first separates the local model into the GNN and classifier to handle unique client-specific task variations. The GNN is trained through federated learning to capture shared knowledge of graph nodes across clients, while the classifier is custom-designed and trained individually for each client. Additionally, a generic classifier shared among clients is adopted to encourage the GNN's grasp of shared information. Then Fed PANo further proposes the node generator along with its local and collaborative training strategies to deal with the node scarcity of clients. Extensive experimental results on benchmark datasets confirm that Fed PANo outperforms eight competitive baselines across different settings.

关键词： personalized federated learning few-shot learning node classification task heterogeneity parameter decoupling node augmentation

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沙尘天气强度特征指数研究--以北京地区为例

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自然灾害学报 2008年第1期17卷 169-173页

作者：邱玉珺牛生杰邹学勇程宏南京信息工程大学大气物理与大气环境重点实验室江苏南京210044 北京师范大学中国沙漠研究中心北京100875

利用1970-2000年北京及其周边地区以及影响北京沙尘天气的上风向共14个基准气象站的沙尘天气与相关气象因子资料,分析了沙尘天气与各因子之间的相关性。研究发现,风速、相对湿度与沙尘天气的相关关系最显著;同时,对能见度与沙尘浓度观... 详细信息

利用1970-2000年北京及其周边地区以及影响北京沙尘天气的上风向共14个基准气象站的沙尘天气与相关气象因子资料,分析了沙尘天气与各因子之间的相关性。研究发现,风速、相对湿度与沙尘天气的相关关系最显著;同时,对能见度与沙尘浓度观测值的分析得出,二者存在非线性关系。在上述分析的基础上,用能见度、风速、相对湿度构建了沙尘强度特征指数,该指数与这3个因子均呈非线性关系,指数值越大表示沙尘天气强度越大,反之,指数值越小表示沙尘天气强度越小。经验说明,沙尘强度特征指数与相应沙尘浓度观测值有着较一致的变化趋势,该指数从气象和环境两个方面反映了沙尘天气的强度特征。

关键词：沙尘天气能见度沙尘强度风速

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