Comparisons among the five ground-motion models developed using RESORCE for the prediction of response spectral accelerations due to earthquakes in Europe and the Middle East   总被引：5，自引：5，他引：0  

John Douglas  Sinan Akkar  Gabriele Ameri  Pierre-Yves Bard  Dino Bindi  Julian J. Bommer  Sanjay Singh Bora  Fabrice Cotton  Boumédiène Derras  Marcel Hermkes  Nicolas Martin Kuehn  Lucia Luzi  Marco Massa  Francesca Pacor  Carsten Riggelsen  M. Abdullah Sandıkkaya  Frank Scherbaum  Peter J. Stafford  Paola Traversa 《Bulletin of Earthquake Engineering》2014,12(1):341-358

This article presents comparisons among the five ground-motion models described in other articles within this special issue, in terms of data selection criteria, characteristics of the models and predicted peak ground and response spectral accelerations. Comparisons are also made with predictions from the Next Generation Attenuation (NGA) models to which the models presented here have similarities (e.g. a common master database has been used) but also differences (e.g. some models in this issue are nonparametric). As a result of the differing data selection criteria and derivation techniques the predicted median ground motions show considerable differences (up to a factor of two for certain scenarios), particularly for magnitudes and distances close to or beyond the range of the available observations. The predicted influence of style-of-faulting shows much variation among models whereas site amplification factors are more similar, with peak amplification at around 1s. These differences are greater than those among predictions from the NGA models. The models for aleatory variability (sigma), however, are similar and suggest that ground-motion variability from this region is slightly higher than that predicted by the NGA models, based primarily on data from California and Taiwan.  相似文献   

Field measurements in river embankments: validation and management with spatial database and webGIS     

Lucia Simeoni  Paolo Zatelli  Claudio Floretta 《Natural Hazards》2014,71(3):1453-1473

This study focuses on the development of a system with a spatial database and a webGIS able to store, validate and display the data to assist the decision makers in managing early warning systems for river embankment failure. In order to obtain precise results, it is essential to have a tool with ability of managing a large number of data for checking their reliability and for locating them in the space. In this paper, special emphasis was given in the development of procedures to assess the reliability of the measures. For this purpose, the database includes all the information needed to describe the instrument performance, such as the sand pack size and casing diameter of open-standpipe piezometers for evaluating their time lag, and the calibration curves of transducers with the possibility of their updating. The position of the non-functioning instruments is identified through the analysis of the electrical signal and spatial displays, while the analyses of the redundancy and coherence of measures is used for detecting doubtful data. Database and webGIS were applied to the monitoring data of an embankment of the Adige River in Northern Italy. The database and webGIS system has proved to be a suitable and effective tool for the management and validation of real-time data and periodical field measurements.  相似文献   

The Rosetta Marbles from Fesleğen, Ören Unit,SW Anatolia     

Franziska Scheffler  Roland Oberhänsli  Amaury Pourteau  Osman Candan  Matteo Di Lucia 《International Journal of Earth Sciences》2014,103(2):485-486

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The investment climate for climate investment: Joint Implementation in transition countries     

Samuel Fankhauser  Lucia Lavric 《Climate Policy》2013,13(4):417-434

Transition countries are expected to become important players in the emerging market for greenhouse gas emission reductions, as they can cut emissions at a relatively low cost. However, the attractiveness of the region as a supplier of emission reductions will not only depend on its cost advantage. It will also depend on the business climate offered to carbon investors—factors like a well-functioning legal and regulatory system, economic and political stability and the capacity to process emission reduction projects efficiently. This paper looks at the carbon investment climate in the transition countries eligible for Joint Implementation (JI)—Russia, Ukraine, Croatia and the EU accession countries. It concludes that JI investors will face a clear trade-off between the scope for cheap JI on the one hand, and the quality of the business environment and JI institutions on the other. The countries with the highest potential for cheap emission reductions also tend to be the countries with the most difficult business climate and the least institutional capacity for JI. The most attractive JI locations may be median countries with a reasonable JI potential and an acceptable business climate, such as Bulgaria, Romania and the Slovak Republic.  相似文献   

Effects of asphericity and substructure on the determination of cluster mass with weak gravitational lensing     

D. Clowe †  G. De Lucia  L. King 《Monthly notices of the Royal Astronomical Society》2004,350(3):1038-1048

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Regional Stress Fields under Tibet from 3D Global Flow Simulation     

张斯奇  David A Yuen  张怀  石耀霖 《中国地质大学学报(英文版)》2011,(2)

Tibetan area is the most active continental collision zone on earth.Several major earth-quakes occurred around the boundaries of Tibetan plateau and caused massive damages and casualties.The dynamics of this area is not well understood due to the complex structure of Tibet and its sur-rounding area.In this study,a 3D global flow simulation with only viscous rheology is applied to studying the stress distribution in this area,and the interaction between Tibet and its surrounding areas is investigated.Finally...  相似文献   

The formation history of elliptical galaxies     

Gabriella De Lucia  Volker Springel  Simon D. M. White  Darren Croton †  Guinevere Kauffmann 《Monthly notices of the Royal Astronomical Society》2006,366(2):499-509

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The build-up of the colour–magnitude relation in galaxy clusters since z∼ 0.8     

Gabriella De Lucia  Bianca M. Poggianti  Alfonso Aragón-Salamanca  Simon D. M. White  Dennis Zaritsky  Douglas Clowe  Claire Halliday  Pascale Jablonka  Anja von der Linden  Bo Milvang-Jensen  Roser Pelló  Gregory Rudnick  Roberto P. Saglia  Luc Simard 《Monthly notices of the Royal Astronomical Society》2007,374(3):809-822

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Galaxies and subhaloes in ΛCDM galaxy clusters     

L. Gao  G. De Lucia  S. D. M. White  A. Jenkins 《Monthly notices of the Royal Astronomical Society》2004,352(2):L1-L5

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A cloud mask methodology for high resolution remote sensing data combining information from high and medium resolution optical sensors   总被引：1，自引：0，他引：1  

Fernando Sedano  Pieter KempeneersPeter Strobl  Jan KuceraPeter Vogt  Lucia SeebachJesús San-Miguel-Ayanz 《ISPRS Journal of Photogrammetry and Remote Sensing》2011,66(5):588-596

This study presents a novel cloud masking approach for high resolution remote sensing images in the context of land cover mapping. As an advantage to traditional methods, the approach does not rely on thermal bands and it is applicable to images from most high resolution earth observation remote sensing sensors. The methodology couples pixel-based seed identification and object-based region growing. The seed identification stage relies on pixel value comparison between high resolution images and cloud free composites at lower spatial resolution from almost simultaneously acquired dates. The methodology was tested taking SPOT4-HRVIR, SPOT5-HRG and IRS-LISS III as high resolution images and cloud free MODIS composites as reference images. The selected scenes included a wide range of cloud types and surface features. The resulting cloud masks were evaluated through visual comparison. They were also compared with ad-hoc independently generated cloud masks and with the automatic cloud cover assessment algorithm (ACCA). In general the results showed an agreement in detected clouds higher than 95% for clouds larger than 50 ha. The approach produced consistent results identifying and mapping clouds of different type and size over various land surfaces including natural vegetation, agriculture land, built-up areas, water bodies and snow.  相似文献