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Numerical simulation and validation of ocean waves measured by an Along-Track Interferometric Synthetic Aperture Radar

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Chinese Journal of Oceanology and Limnology 2008年第1期26卷 1-8页

作者：张彪何宜军 paris W.VACHON Institute of Oceanology Chinese Academy of SciencesQingdao 266071 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Canada Centre for Remote Sensing Natural Resources Canada588 Booth Street Ottawa ON K1A 0Y7 Canada

A new nonlinear integral transform of ocean wave spectra into Along-Track Interferometric Synthetic Aperture Radar （ATI-SAR） image spectra is described. ATI-SAR phase image spectra are calculated for various sea states and radar configurations based on the nonlinear integral transform. The numerical simulations show that the slant range to velocity ratio （R/V）, significant wave height to ocean wavelength ratio （Hi2）, the baseline （2B） and incident angle （0） affect ATI-SAR imaging. The ATI-SAR imaging theory is validated by means of Two X-band, HH-polarized ATI-SAR phase images of ocean waves and eight C-band, HH-polarized ATI-SAR phase image spectra of ocean waves. It is shown that ATI-SAR phase image spectra are in agreement with those calculated by forward mapping in situ directional wave spectra collected simultaneously with available ATI-SAR observations. ATI-SAR spectral correlation coefficients between observed and simulated are greater than 0.6 and are not sensitive to the degree of nonlinearity. However, the ATI-SARoPhase image spectral turns towards the range direction, even if the real ocean wave direction is 30. It is also shown that the ATI-SAR imaging mechanism is significantly affected by the degree of velocity bunching nonlinearity, especially for high values of R/V and H/2.

关键词： ATI-SAR nonlinear integral transform numerical simulation validation

Chitinozoans from the Fenxiang Formation (Early Ordovician) of Yichang,Hubei Province,China

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Acta Geologica Sinica(English Edition) 2008年第2期82卷 287-294页

作者： CHEN Xiaohong Florentin paris ZHANG Miao Yichang Institute of Geology and Mineral Resources Hubei 443003 China Geosciences-Rennes UMR6-118 du CNRS Universite de Rennes I 35042 Rennes Cedex France

Chitinozoans collected from upper Tremadocian to lower Floian strata of Chenjiahe section, Yichang, western Hubei, China comprise six species belonging respectively to the genera Euconochitina including a new species, Euconochitina fenxiangensis, Lagenochitina and Bursachitina, together with Desmochitina sp. and Eremochitina sp. The chitinozoan succession across the interval is correlated with relevant conodont and chitinozoan biozones and two new regional chitinozoan biozones, the Lagenochitina destombesi Biozone and the Euconochitina symmetrica Biozone are proposed based on their stratigraphic ranges in the Fenxiang to Honghuayuan formations in the Chenjiahe section.

关键词： Early Ordovician Chitinozoa systematics biozonation western Hubei China

Compositional Features of Fine Sediments Involved in the Montescaglioso Landslide(Southern Italy)

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Journal of Earth Science 2022年第6期33卷 1513-1525页

作者： Vito Summa Rosa Sinisi Eleonora paris Agnese Emanuela Bonomo National Research Council Institute of Methodologies for Environmental AnalysisC/da S.Loja 85050Tito ScaloItaly School of Science and Technology Geology DivisionUniversity of Camerino62032CamerinoItaly

This paper presents the multidisciplinary study of the southern Italy Plio-Pleistocene sediments involved in the large Montescaglioso *** principal aim of the work is to assess the compositional characters(i.e.,grain-size,mineralogy,petrography and geochemistry)and some rheological features(Atterberg’s limits,plasticity index and activity)of these sediments to enrich our knowledge about the Montescaglioso fine sediments and correlation among the lithological properties *** types of sediments,from a deep geognostic borehole and from the surrounding landslide area,were collected and *** significant compositional differences have been found between the core and landslide area ***,some changes have been detected in sediments along the ***,the-15 to-20 m lithostratigraphic level hosts the highest percentages of phyllosilicates and clay fraction(CF),commonly considered as possible hazard factors for the landslide *** more,in the studied core sediments,the CF contents correlate with the Atterberg’s liquid and plastic limits and a CF value of about 38%was suggested as threshold value for the changing of index properties of *** factors,such as the weathering degree and clay mineral type,do not show significant correlations with the rheological properties of sediments here studied.

关键词： grain-size mineralogy geochemistry index properties Plio-Pleistocene sediments

“BUTTERFLY” PRECIPITATES IN δ-TiN_(0.53)→δ’-TiN_(0.53) ORDERING TRANSFORMATION①

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中国有色金属学会会刊：英文版 1996年第2期6卷 57-60页

作者： Du Jun Yang Gaiying Portier R Shi Likai (General Research Institute for Non-Ferrous Metals, Beijing 100088 Ecole Nationale Superieure de Chimie de paris, 75231 paris, France) GEN RES INST NONFERROUS MET BEIJING 100088 PEOPLES R CHINA ECOLE NATL SUPER CHIM F-75231 PARIS FRANCE

“ＢＵＴＴＥＲＦＬＹ”ＰＲＥＣＩＰＩＴＡＴＥＳＩＮδ－ＴｉＮ_（０．５３）→δ’－ＴｉＮ_（０．５３）ＯＲＤＥＲＩＮＧＴＲＡＮＳＦＯＲＭＡＴＩＯＮＤｕＪｕｎ；ＹａｎｇＧａｉｙｉｎｇ；ＰｏｒｔｉｅｒＲ；ＳｈｉＬｉｋａｉ（... 详细信息

“ＢＵＴＴＥＲＦＬＹ”ＰＲＥＣＩＰＩＴＡＴＥＳＩＮδ－ＴｉＮ_（０．５３）→δ’－ＴｉＮ_（０．５３）ＯＲＤＥＲＩＮＧＴＲＡＮＳＦＯＲＭＡＴＩＯＮＤｕＪｕｎ；ＹａｎｇＧａｉｙｉｎｇ；ＰｏｒｔｉｅｒＲ；ＳｈｉＬｉｋａｉ（ＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎ...

关键词： butterfly”precipitates δ’-TiN0.53 ordering transformation

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伦敦女生的房间

Mitochondrial phylogeography of the Iberian endemic frog Rana iberica,with implications for its conservation

作者： Editions de paris

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Current Zoology 2018年第6期64卷 755-764页

作者： Jose TEIXEIRA Helena GONCALVES Nuno FERRAND Mario GARCIA-paris Ernesto RECUERO Centro Interdisciplinar de Investigacao Marinha e Ambiental (CIIMAR) Terminal de Cruzeiros do Porto de LeixoesMatosinhos 4450-208Portugal Centro de Investigacao em Biodiversidade e Recursos Geneticos (CIBIO-InBIO) Universidade do PortoRua Padre Armando QuintasVairao 4485-661Portugal Museu de Historia Natural e da Cieneia da Universidade do Porto (MHNC-UP) Praca Gomes TeixeiraPorto 4099-002Portugal Departamento de Biologia Faculdade de Ciencias da Universidade do PortoPorto 4099-002Portugal Museo Nacional de Ciencias Naturales (MNCN-CSIC) Calle de Jose Gutierrez Abascal2Madrid 28006Spain

Genetic characterization of species using phylogeographic approaches represents a basic reference to understand their evolutionary history as well as to identify conservation priorities to protect areas of particular interest regarding evolutionary *** in well-studied regions such information is lacking for the majority of species,including many endemic species with reduced distribution *** investigate the phylogeographic pattern of the Iberian frog Rana iberica,an endemic amphibian restricted to Central and North-Western Iberian *** mitochondrial sequences,we reconstruct the phylogeographic history of the species to test the effect of Quaternary climate changes on the evolutionary diversification of lineages,that is,the differentiation of mitochondrial lineages and the formation of genetic diversity melting pots,and integrate phylogeographic evidence for future conservation *** results indicate the existence of 3 main mitochondrial lineages differentiated during the Upper *** historical demographic analyses and climatic niche modeling show a strong effect of glacial climate changes,suggesting recurrent range contractions and *** such circumstances,differentiation took place most likely by isolation in allopatric interglacial *** lineage admixture in northern Portugal generated a broad mixed zone with highest nucleotide *** its particular evolutionary potential,its reduced distribution and eventual threats under current climate change scenario,conservation priorities should focus on the isolated lineage from Sierra de Guadalupe.

关键词： climate niche modeling conservation demography glacial refugia phylogeegraphy Amphibia

Mechanistic Machine Learning:Theory,Methods,and Applications

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Theoretical & Applied Mechanics Letters 2020年第3期10卷 141-142页

作者： paris Perdikaris Shaoqiang Tang Department of Mechanical Engineering and Applied Mechanics at the University of Pennsylvania Department of Mechanics and Engineering Science Peking University

Recent advances in machine learning are currently influencing the way we gather data,recognize patterns,and build predictive models across a wide range of scientific *** successes include solutions in image and voice recognition that have already become part of our everyday lives,mainly enabled by algorithmic developments,hardware advances,and,of course,the availability of massive *** of such predictive tasks are currently being tackled using over-parameterized,black-box discriminative models such as deep neural networks,in which theoretical rigor,interpretability and adherence to first physical principles are often sacrificed in favor of flexibility in representation and scalability in computation.

关键词： everyday hardware massive

On invariant sets in Lagrangian graphs

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Science China Mathematics 2010年第12期53卷 3095-3098页

作者： CUI XiaoJun 1,2, & ZHAO Lei 3,4 1 Department of Mathematics, Nanjing University, Nanjing 210093, China 2 Mathematisches Institut, Albert-Ludwigs-Universita¨t, Freiburg im Breisgau 79104, Germany 3 ASD, IMCCE, paris Observatory, paris 75014, France 4 Department of Mathematics, paris 7 University, paris 75013, France 1. Department of Mathematics Nanjing University Nanjing 210093 China2. Mathematisches Institut Albert-Ludwigs-Universit?t Freiburg im Breisgau 79104 Germany3. ASD IMCCE Paris Observatory Paris 75014 France4. Department of Mathematics Paris 7 University Paris 75013 France

In this exposition, we show that the Hamiltonian is always constant on a compact invariant connected subset which lies in a Lagrangian graph provided that the Hamiltonian and the graph are sufficiently smooth. We also provide some counterexamples to show that if the Hamiltonian function is not smooth enough, then it may be non-constant on a compact invariant connected subset which lies in a Lagrangian graph.

关键词： Lagrangian graph invariant set critical value

Housing flexibility problem： Review of recent limitations and solutions

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Frontiers of Architectural Research 2018年第1期7卷 80-91页

作者： Sabine Ritter De paris Carlos Nuno L. Lopes Centro de Inovaco em Arquitectura e Modos de Habitar (CIAMH) University of Porto Porto 4150-564 Portugal

The economic, technological, and cultural transformations of our present society influence various scales of our daily lives. In housing, these transformations include changes in the family nucleus and the activities performed in living spaces. Housing flexibility seeks to meet the muitipte needs of users by changing their living spaces and functions. This study aims to explore housing flexibility through a review of relevant literature, discussion of valuable findings, and presentation of a contemporary panorama of the theme. Notions of flexibility are integrated to reinterpret the contemporary sense of dwelling. However, the lack of a well-defined concept of flexibility hinders the integration of methods and theories on the subject.

关键词： Housing Fiexibility Building