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First spaceborne demonstration of BeiDou-3 signals for GNSS reflectometry from cYGNSS constellation

chinese Journal of Aeronautics 2021年第9期34卷 1-10页

作者： Weiqiang LI Estel cARDELLAcH Serni RIBO Antonio rius Bo ZHOU Institute of Space Sciences(IcE CSIC)Barcelona 08193Spain Institut d'Estudis Espacials de catalunya(IEEc) Barcelona 08034Spain Shanghai Spaceflight Institute of TT&c and Telecommunications Shanghai 201109China

The full constellation of chinese Global Navigation Satellite System(GNSS)Bei Dou-3 has been deployed completely and started fully operational *** addition to providing global Positioning,Navigation and Timing(PNT)services,the Bei Dou-3 satellites transmissions can also be used as the sources of illumination for Earth Observation(EO)with a bistatic radar *** innovative EO concept,known as GNSS reflectometry(GNSS-R),allows to measure the Earth surface characteristics at high resolution via the reflected L-band radar signals collected by a constellation of small,low cost and low Earth orbiting *** the first time in orbit,earth reflected Bei Dou-3 signal has been detected from the limited sets of raw data collected by the NASA’s cyclone GNSS(cYGNSS)*** feasibility of spaceborne Bei Dou-3 reflections on two typical applications,including sea surface wind and flooding inundation detection,has been *** methodology and results give new strength to the prospect of new spaceborne GNSS-R instruments and missions,which can make multi-GNSS reflectometry observations available to better capture rapidly changing weather systems at better spatio-temporal scales.

关键词： Global Navigation Satellite System(GNSS) BeiDou-3 Small satellites Bistatic radar GNSS Reflectometry(GNSS-R) cYGNSS Tropical cyclone Flood inundation

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维普期刊数据库

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Strong Labelings of Linear Forests

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Acta mathematica Sinica,English Series 2009年第12期25卷 1951-1964页

作者： martin BAcA Yu Qing LIN Francesc A. MUNTANER-BATLE Miquel rius-FONT Department of Applied mathematics Technical University in Kosice Letnd 9 04200 Kosice Slovakia School of Electrical Engineering and computer Science The University of Newcastle Newcastle NSW 2308 Australia Facultat de ciencies Polltiques i Jurldiques Universitat Internacional de Catalunya Barcelona Catalunya 08017 Spain Departament de matematica Aplicada i Telematica Universitat Politecnica de catalunya Barcelona Catalunya 08034 Spain

A （p, q）-graph G is called super edge-magic if there exists a bijective function f ： V（G） U E（G） →{1, 2 p＋q} such that f（u）＋ f（v）＋f（uv） is a constant for each uv c E（G） and f（Y（G）） = {1,2,...,p}. In this paper, we introduce the concept of strong super edge-magic labeling as a particular class of super edge-magic labelings and we use such labelings in order to show that the number of super edge-magic labelings of an odd union of path-like trees （mT）, all of them of the same order, grows at least exponentially with m.

关键词： linear forest path-like tree strong super edge magic labeling

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维普期刊数据库

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Prevalence and ecological factors affecting the distribution of plant-parasitic nematodes in Prunus groves in Spain

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Journal of Integrative Agriculture 2024年第2期23卷 566-589页

作者： Ilenia clavero-camacho Antonio Archidona-Yuste carolina cantalapiedra-Navarrete Pablo castillo Juan Emilio Palomares-rius Institute for Sustainable Agriculture(IAS) Spanish National Research Council(CSIC)Córdoba 14004Spain Andalusian Institute of Agricultural and Fisheries Research and Training(IFAPA) Centro Alameda del ObispoCórdoba 14004Spain

A wide survey was conducted to study plant-parasitic nematodes(PPNs)associated with Prunus groves in *** research aimed to determine the prevalence and distribution of PPNs in Prunus groves,as well as the influence of explanatory variables describing soil,climate and agricultural management in structuring the variation of PPNs community composition.A total of 218 sampling sites were surveyed and 84 PPN species belonging to 32 genera were identified based of an integrative taxonomic *** species considered as potential limiting factors in Prunus production,such as Meloidogyne arenaria,***,***,Pratylenchus penetrans and ***,were identified in this *** soil physico-chemical(c,Mg,N,Na,OM,P,pH and clay,loamy sand and sandy loam texture classes),four climate(Bio04,Bio05,Bio13 and Bio14)and four agricultural management variables(grove-use history less than 10 years,irrigation,apricot seedling rootstock,and Montclar rootstock)were identified as the most influential variables driving spatial patterns of PPNs *** particular,younger plantations showed higher values for species richness and diversity indices than groves cultivated for more than 20 years with Prunus *** study increases the knowledge of the distribution and prevalence of PPNs associated with Prunus rhizosphere,as well as on the influence of explanatory variables driving the spatial structure PPNs communities,which has important implications for the successful design of sustainable management strategies in the future in this agricultural system.

关键词： nematodes Meloidogyne Pratylenchus Paratylenchus rootstock distribution soil grove-use almond peach

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维普期刊数据库

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