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Initiation,organizational modes and environmental conditions of severe convective wind events during the warm season over North China

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Science China Earth Sciences 2024年第9期67卷 2876-2894页

作者： Yue HUANG Jianhua SUN Yuanchun ZHANG Ruoyun MA Xinlin YANG fuyou TIAN Key Laboratory of Cloud-Precipitation Physics and Severe Storms(LACS) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of the Chinese Academy of Sciences Beijing 100049China Earth System Modeling and Prediction Center China Meteorological AdministrationBeijing 100081China College of Aviation Meteorology Civil Aviation Flight University of ChinaGuanghan 618307China National Meteorological Center China Meteorological AdministrationBeijing 100081China

Based on the significant weather report,CG lightning,composite radar reflectivity,and ERA5 reanalysis data,we first studied the spatiotemporal distribution characteristics of four types(only severe convective wind(SCW);SCW and hail;SCW and short-duration heavy rainfall(SDHR);and SCW,hail,and SDHR)of convective weather events related to SCW during the warm season(May to September)from 2011 to 2018 in North ***,severe convective cases producing SCW were selected to statistically analyze the initiation,decay,lifetime,and organizational characteristics of convective ***,using ERA5 reanalysis data and conventional surface observation data,preconvective soundings were constructed to explore the differences in environmental conditions for initiating convective systems between SCW and *** results indicate that mixed-type of SCW and SDHR events occur more frequently over plains,while other types of convective weather occur more frequently over *** frequency peak of SCW occurs in June,while mixed convective weather peaks in *** initiation time of convective systems is concentrated between 1000 and 1300 BST,with a peak at 1200 *** mountains,the daily peaks of ordinary and significant SCW generally occur at 1700-1800 BST and 1600-1700 BST,respectively,while over plains,the peak of ordinary SCW typically lags behind that of mountains by 1-2 ***,SCW systems are mainly initiated over mountains,with most lifetimes lasting 7–13 *** convective systems produce the most SCW events,followed by trailing-stratiform convective *** convective available potential energy(CAPE),downdraft convective available potential energy,and the temperature difference between 850 and 500 hPa can all distinguish between SCW systems and non-SCW systems occurring over *** to non-SCW convective systems,SCW convective systems over mountains are more likely to occur in environments with less precipitable water,while S

关键词： Severe convective wind Convective systems Initiation Organizational modes Environmental conditions

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Two birds with one stone:Amine-functionalized MSNs@Eu(OH)CO_(3) nanoprobe for efficient dissolution-enhanced afterglow bioassay

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Nano Research 2022年第9期15卷 8360-8366页

作者： Fuying Zhang Donghao Hu Xianlong Su Zhengdao Hong Wei Feng Ming Xu fuyou Li Department of Chemistry&State Key Laboratory of Molecular Engineering of Polymers&Institute of Biomedicine Science Fudan UniversityShanghai 200433China

ABSTRACT The efficient detection of tumor markers is crucial to early cancer diagnosis and ***,we propose a unique“two birds with one stone”dissolution-enhanced afterglow bioassay based on amino-functionalized mesoporous SiO2 nanoparticles(MSNs-NH2)encapsulated Eu(OH)CO_(3)*** nanoprobes(i)stably conjugate to the antibody and(ii)are highly soluble in the acidic enhancer solution,and provide a high Eu3+*** released Eu3+ions further activate the photochemical afterglow system to determine the alpha-fetoprotein(AFP)levels in clinical serum *** the use of a real-time excitation source,the interference of autofluorescence and scattering from blood can be *** demonstrated limit of detection(LOD)for AFP was as low as 0.12 ng·mL^(−1).This covalently connected dissolution-enhanced luminescent bioassay(DELBA)and novel afterglow system shows tremendous potential for ultrasensitive and rapid clinical diagnosis.

关键词： bioassay photochemical afterglow mesoporous SiO2 nanoparticles(MSNs) nanocomposites dissolution-enhanced

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A luminescent metal-organic framework with an open cubic cage and eight-coordinate cadmium nodes

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Science China Chemistry 2010年第10期53卷 2079-2082页

作者： WANG ChuanFeng ZHANG ZhengXing ZHANG LiLi LI fuyou ZHOU XiGeng Department of Chemistry Fudan UniversityShanghai 200433China Department of Chemistry Taizhou CollegeLinhai 317000China

Self-assembly of cadmium ions and the rigid bridging ligand 4,4′-methylenebis(3-hydroxy-2-naphthoic acid) (pamoic acid, H4PA) leads to a one-dimensional metal-organic framework with open cube-like M2(H2PA)2 cages wit... 详细信息

关键词： framework eight-coordinate cadmium cubic cage fluorescence pamoic acid

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Node2vec Representation for Clustering Journals and as A Possible Measure of Diversity

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Journal of Data and Information Science 2019年第2期4卷 79-92页

作者： Zhesi Shen fuyou Chen Liying Yang Jinshan Wu National Science Library Chinese Academy of Sciences School of Systems Science Beijing Normal University

Purpose: To investigate the effectiveness of using node2 vec on journal citation networks to represent journals as vectors for tasks such as clustering, science mapping, and journal diversity ***/methodology/approach: Node2 vec is used in a journal citation network to generate journal vector representations. Findings: 1. Journals are clustered based on the node2 vec trained vectors to form a science map. 2. The norm of the vector can be seen as an indicator of the diversity of journals. 3. Using node2 vec trained journal vectors to determine the Rao-Stirling diversity measure leads to a better measure of diversity than that of direct citation *** limitations: All analyses use citation data and only focus on the journal *** implications: Node2 vec trained journal vectors embed rich information about journals, can be used to form a science map and may generate better values of journal diversity ***/value: The effectiveness of node2 vec in scientometric analysis is tested. Possible indicators for journal diversity measure are presented.

关键词： Science mapping Diversity Graph embedding Vector norm

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Synthesis of Granular Hydroxy‑Functionalized Ultra‑high‑molecular‑weight Polyethylene and Its Fiber Properties

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Advanced Fiber Materials 2022年第4期4卷 786-794页

作者： Haobo Yuan Cong Long Junrong Yu fuyou Ke Takeshi Shiono Zhengguo Cai State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China Graduate School of Advanced Science and Engineering Hiroshima UniversityKagamiyama 1‑4‑1Higashi‑HiroshimaHiroshima 739‑8527Japan

Granular hydroxyl-functionalized UHMWPE was successfully prepared through copolymerization of ethylene and 10-undecen-1-ol protected by tri-iso-butylaluminum using a titanium complex.[tBuNSiMe_(2)(2,7-tBu2Flu)]TiMe_(2) was activated in hexane by silica-supported *** any additional pretreatments,the obtained polymer powders were transformed into fibers through a gel-spinning and heat drawing *** compared to fibers generated from the equivalent unfunctionalized UHMWPE or the commercial HUMWPE,both creep resistance and hydrophilic properties were improved in the hydroxy-functionalized UHMWPE fibers without losing tensile strength.

关键词： Hydroxy-functionalized UHMWPE Ansa-Fluorenylamidodimethyltitanium Silica-supported MMAO UHMWPE fiber Creep resistance

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Fenitized Wall Rock Geochemistry of the First Carbonatite Dyke at Bayan Obo, Inner Mongolia, China

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Acta Geologica Sinica(English Edition) 2018年第2期92卷 600-613页

作者： WANG Kaiyi ZHANG Jien YU Liangjun FANG Aimin DONG Ce HU fuyou Institute of Geology and Geophysics Chinese Academy of Sciences

The first carbonatite dyke at Bayan Obo is well exposed on the surface for a length and width of approximately 60 m and 1.1-1.5 m, respectively. Along its strike, the fenitized H1 （Qs） and H2 （Cs） quartzite is replaced by Na-amphiboles, aegirines, and alkali-feldspars, intermittently stretching as far away as 800 m in length. Based on petrographical characteristics, the dyke＇s fenitized wall rocks are divisible into different zones：（1） outer, （2） middle, and （3） inner. The outer zone is 5-17 m from the NW margin of the dyke. The middle zone is located at 3.5-5 m from the NW margin of the dyke. The inner contact zone is located between direct contact with the dyke and 3.5 m from the dyke. In the outer zone, upon visual examination, no evidence of outcrop fenitization was found and the major elemental rock composition is nearly identical to the unaltered H1 and H2 lithologies. In the thin sections, however, small amounts of Na-amphibole and phlogopite are present. Despite relatively poor development throughout the 5 m of fenitization, the wall rocks have retained at least a small geochemical signature comparable to the original sedimentary protolith. The fenites occurring in the inner zone exhibit distinct variations, not only for the sharp contact at the outcrop scale, but also for variations in major, rare earth elements （REE）, and trace elements and Sm-Nd isotope composition. The wall rocks within 3.5 m have undergone strong fenitization, inheriting the geochemical signature derived from the carbonatite dyke. Fenitization in the middle zone was not as strong, at least compared to the inner zone, but was stronger than the outer zone. Compared to some trace elements and REEs, the major elements are relatively immobile during fenitization. The Sm-Nd isotope data for the carbonatite dyke and the adjacent fenitized wall rocks, where the Sm and Nd originate solely from the dyke, plots as a six-point isochron with an age of 1308~56 Ma. This age is identical to that of or

关键词： Bayan Obo first carbonatite dyke fenitization

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Challenges and opportunities in remote sensing-based crop monitoring: a review

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National Science Review 2023年第4期10卷 203-219页

作者： Bingfang Wu miao Zhang Hongwei Zeng fuyou Tian Andries B Potgieter Xingli Qin Nana Yan Sheng Chang Yan Zhao Qinghan Dong Vijendra Boken Dmitry Plotnikov Huadong Guo Fangming Wu Hang Zhao Bart Deronde Laurent Tits Evgeny Loupian State Key Laboratory of Remote Sensing Science Aerospace Information Research Institute Chinese Academy of Sciences School of Resources and Environment University of Chinese Academy of Sciences Executive Committee of Group on Earth Observations Global Agricultural Monitoring (GEOGLAM) Queensland Alliance for Agriculture and Food Innovation The University of Queensland Department of Remote Sensing Flemish Institute of Technological Research Department of Geography and Earth Science University of Nebraska-Kearney Department of Satellite Monitoring Technologies Space Research Institute of Russian Academy of Sciences

Building a more resilient food system for sustainable development and reducing uncertainty in global food markets both require concurrent and near-real-time and reliable crop information for decision ***-driven crop monitoring has become a main method to derive crop information at local, regional,and global scales by revealing the spatial and temporal dimensions of crop growth status and ***, there is a lack of quantitative, objective, and robust methods to ensure the reliability of crop information, which reduces the applicability of crop monitoring and leads to uncertain and undesirable consequences. In this paper, we review recent progress in crop monitoring and identify the challenges and opportunities in future efforts. We find that satellite-derived metrics do not fully capture determinants of crop production and do not quantitatively interpret crop growth status; the later can be advanced by integrating effective satellite-derived metrics and new onboard sensors. We have identified that ground data accessibility and the negative effects of knowledge-based analyses are two essential issues in crop monitoring that reduce the applicability of crop monitoring for decisions on food security. Crowdsourcing is one solution to overcome the restrictions of ground-truth data accessibility. We argue that user participation in the complete process of crop monitoring could improve the reliability of crop *** users to obtain crop information from multiple sources could prevent unconscious ***, there is a need to avoid conflicts of interest in publishing publicly available crop information.

关键词： crop monitoring crop condition crop production Ground data Remote Sensing

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The depositional Environment at Shuidonggou Locality 2 in Northwest China at ～72-18 kaBP

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Acta Geologica Sinica(English Edition) 2012年第6期86卷 1539-1546页

作者： LIU Decheng GAO Xing LIU Enfa PEI Shuwen CHEN fuyou ZHANG Shuqin Institute of Vertebrate Paleontology and Paleoanthtopology the Laboratory of Human EvolutionChinese Academy of Sciences The Fourth Geological Exploration Institute of Henan Geology and Mineral Bureau Research Center of Paleontology&Stratigraphy Jilin University

Shuidonggou site has abundant Paleolithic remains of Late Pleistocene deposition. Studying the evolution of depositional environments is essential to the comprehensive understanding of the living conditions of ancient populations. To reconstruct the depositional environment at Shuidonggou, we carried out archaeological excavations and collected systematic deposition samples at the key position of Shuidonggou Locality 2 for grain size analysis and sporopollen statistics. The environmental evolution around the Shuidonggou site generally underwent four stages at ~72-18 kaBP. During the first stage （~72-41 kaBP）, the river developed with gravel and sand stratums. During the second stage （41-34 kaBP）, a swamp with numerous aquatic plants formed. In the third stage （34-29 kaBP）, site formation was characterized by shallow lake depositional conditions; the climate was relatively warm and humid. The marginal bank depositional conditions deteriorated during the fourth stage （29-18 kaBP）, and the site underwent several dry events; the climate also became drier and colder.

关键词： Shuidonggou site depositional environment grain size sporopollen Upper Paleolithic

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Climate background of the evolution from Paleolithic to Neolithic cultural transition during the last deglaciation in the middle reaches of the Yellow River

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Chinese Science Bulletin 2002年第1期47卷 71-75页

作者： Zhengkai Xia Ge Chen Gongwang Zheng fuyou Chen Junqing Han Peking Univ Dept Urban & Environm Sci Beijing 100871 Peoples R China

Shizitan in Jixian County, Shanxi Province, is a site of transitional period from Paleolithic to Neolithic. The dating and the sporopollen analysis show that the middle reaches of the Yellow River where the site is located had been maintaining a steppe environment during 35.1-9.4 kaBP, in which, 35.1-17 kaBP belonged to the last glacial. With cold and dry climate, this period featured a desert steppe environment. In the late of this period, the area had a cold and half-humid steppe environment. The 17.0-11.9 kaBP belonged to the early- and mid-period of the last deglaciation. Mild and half-arid steppe alternates with mild and half-arid steppe, with a small amount of deciduous broadleaf species. During the period of 11.9-10.5 kaBP, cold and dry glacial climate appeared once more, featuring a desert steppe environment. During 10.5-9.4 kaBP, it is mild and half-arid, and later transited toward warm and half-humid. The early phase of this period featured a steppe environment and the later transited into a

关键词： Jixian County in Shanxi Province Shizitan site sporo-pollen analysis last deglaciation Paleolithic-Neolithic cultural transition.

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Numerical Simulation of Blood Flow in Aorta with Dilation:A Comparison between Laminar and LES Modeling Methods

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Computer Modeling in Engineering & Sciences 2020年第8期124卷 509-526页

作者： Lijian Xu Tianyang Yang Lekang Yin Ye Kong Yuri Vassilevski fuyou Liang School of Naval Architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Shanghai Chest Hospital Shanghai Jiao Tong UniversityShanghai200030China Zhongshan Hospital Fudan UniversityShanghai200032China Marchuk Institute of Numerical Mathematics Russian Academy of SciencesMoscow119333Russia Institute for Personalized Medicine Sechenov UniversityMoscow119991Russia Key Laboratory of Hydrodynamics(Ministry of Education) Shanghai Jiao Tong UniversityShanghai200240China

Computational modeling methods have been increasingly employed to quantify aortic hemodynamic parameters that are challenging to in vivo measurements but important for the diagnosis/treatment of aortic *** the presence of turbulence-like behaviors of blood flow in normal or diseased aorta has long been confirmed,the majority of existing computational model studies adopted the laminar flow assumption(LFA)in the treatment of sub-grid flow *** far,it remains unclear whether LFA would significantly compromise the reliability of hemodynamic *** the present study,we addressed the issue in the context of a specific aortopathy,namely aortic dilation,which is usually accompanied by disturbed flow *** patient-specific aortas with treated/untreated dilation of the ascending segment were investigated,and their geometrical models were reconstructed from computed tomography angiographic images,with the boundary conditions being prescribed based on flow velocity information measured in vivo with the phase contrast magnetic resonance imaging *** the modeling of blood flow,apart from the traditional LFA-based method in which sub-grid flow dynamics is ignored,the large eddy simulation(LES)method capable of incorporating the dissipative energy loss induced by turbulent eddies at the sub-grid level,was adopted and taken as a reference for examining the performance of the LFA-based *** results showed that the simulated large-scale flow patterns with the two methods had high similarity,both agreeing well with in vivo measurements,although locally large between-method discrepancies in computed hemodynamic quantities existed in regions with high intensity of flow ***,a switch from the LES to the LFAbased modeling method led to mild(<6%)changes in computed space-averaged wall shear stress metrics(i.e.,SA-TAWSS,SA-OSI)in the ascending aortic segment where intensive vortex evolution accompanied by high stat

关键词： Blood flow aortic dilation computational modeling turbulence laminar flow assumption large eddy simulation

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