检索结果-南通市图书馆

Using Extreme Value Theory to Assess the Mortality Risk of Tornado Outbreaks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2023年第1期14卷 14-25页

作者： Vilane Gonçalves Sales eric Strobl Department of Economics University of Bern3012BernSwitzerland Oeschger Centre for Climate Change Research University of Bern3012BernSwitzerland World Trade Institute University of Bern3012BernSwitzerland

The majority of tornado fatalities occur during severe thunderstorm occurrences that produce a large number of tornadoes,termed tornado *** study used extreme value theory to estimate the impact of tornado outbreaks on fatalities while accounting for climate and demographic *** findings indicate that the number of fatalities increases with the increase of tornado ***,this study undertook a counterfactual analysis to determine what would have been the probability of a tornado outbreak under various climatic and demographic *** results of the counterfactual study indicate that the likelihood of increased mortality increases as the population forecast *** El Niño events,on the other hand,reduce the likelihood of further *** Niña events are expected to increase probability of fatalities.

关键词： Climate change Demography Extreme value theory Fatalities Tornado outbreaks

3D particle tracking velocimetry for the determination of temporally resolved particle trajectories within laser powder bed fusion of metals

在线全文

学校读者我要写书评

暂无评论

International Journal of Extreme Manufacturing 2019年第3期1卷 96-105页

作者： eric Eschner Tobias Staudt Michael Schmidt Institute of Photonic Technologies Friedrich-Alexander-Universität Erlangen-NürnbergKonrad-Zuse-Str.3/5D-91052ErlangenGermany Graduate School in Advanced Optical Technologies Friedrich-Alexander-Universität Erlangen-NürnbergPaul-Gordan-Str.6D-91052ErlangenGermany

Within this work,we present a system for the measurement of the three-dimensional(3D)trajectories of spatters and entrained particles during laser powder bed fusion(L-PBF)of *** is comprised of two ultrahigh-speed cameras and a reconstruction task specific processing reconstruction *** system enables an automated determination of 3D measures from the trajectories of a large number of tracked *** evolving from an underdetermined geometrical situation induced by a two-camera setup is resolved within the tracking using a priori knowledge of L-PBF of *** processing steps were optimized to run on a graphics processing unit to allow the processing of large amounts of data within an appropriate time *** overall approach was validated by a comparison of the measurement results to synthetic images with a known 3D ground truth.

关键词： powder bed fusion laser image processing additive manufacturing high-speed imaging 3D particle velocimetry

Gαq takes centre stage in multiple sclerosis pathogenesis

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2017年第5期14卷 401-402页

作者： eric J Downer School of Medicine Discipline of PhysiologyTrinity Biomedical Sciences Institute Trinity Col-lege Dublin Dublin 2 Ireland

There is no cure for multiple sclerosis （MS）; however, a number of strategies exist for disease management, including medications that reduce the frequency of relapses and long-term accrual of disability.1 However, the fact that MS therapies can be partially effective and have the risk of side effects, in addition to the observation that disability often continues to worsen despite immunotherapy, has highlighted the need for novel therapeutic targets in the disease.

关键词： Gαq centre stage multiple sclerosis

Constructing Damage Indices Based on Publicly Available Spatial Data:Exemplified by Earthquakes and Volcanic Eruptions in Indonesia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2021年第3期12卷 410-427页

作者： Emmanuel Skoufias eric Strobl Thomas Tveit Poverty and Equity Global Practice World BankWashingtonDC 20433USA Department of Economics University of Bern3012 BernSwitzerland

This article demonstrates the construction of earthquake and volcano damage indices using publicly available remote sensing sources and data on the physical characteristics of *** earthquakes we use peak ground motion maps in conjunction with building type fragility curves to construct a local damage *** volcanoes we employ volcanic ash data as a proxy for local *** indices are then spatially aggregated by taking local economic exposure into account by assessing nightlight intensity derived from satellite *** demonstrate the use of these indices with a case study of Indonesia,a country frequently exposed to earthquakes and volcanic *** results show that the indices capture the areas with the highest damage,and we provide overviews of the modeled aggregated damage for all provinces and districts in Indonesia for the time period 2004 to *** indices were constructed using a combination of software programs—ArcGIS/Python,Matlab,and *** also outline what potential freeware alternatives ***,for each index we highlight the assumptions and limitations that a potential practitioner needs to be aware of.

关键词： Damage indices Indonesia Natural hazard modeling Remote sensing data

The past 800 ka viewed through Antarctic ice cores

在线全文

学校读者我要写书评

暂无评论

Episodes 2008年第2期31卷 219-221页

作者： eric W Wolff British Antarctic Survey High Cross Madingley Road Cambridge CB3 0ET UK.

The later parts of the Quaternary are of particular importance for assessing our ability to understand the future operation of the Earth because the main boundary conditions are similar to those of today, and because we have a density of data that allows hypotheses to be tested rigorously. An important source of such data is Antarctic ice cores, now extending back 800 ka, and containing signals both of climate, and of climate forcing factors. The Antarctic ice core deuterium record, representing Antarctic temperature, is one of the iconic Quaternary records.

关键词：第四纪地质时代南极冰川地球

On the Importance of High-Resolution in Large-Scale Ocean Models

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2021年第10期38卷 1621-1634页

作者： eric *** Xiaobiao XU Center for Ocean-Atmospheric Prediction Studies(COAPS) Florida State UniversityTallahasseeFL32310USA

Eddying global ocean models are now routinely used for ocean prediction,and the value-added of a better representation of the observed ocean variability and western boundary currents at that resolution is currently being evaluated in climate *** overview article begins with a brief summary of the impact on ocean model biases of resolving eddies in several global ocean-sea ice numerical ***,a series of North and Equatorial Atlantic configurations are used to show that an increase of the horizontal resolution from eddy-resolving to submesoscale-enabled together with the inclusion of high-resolution bathymetry and tides significantly improve the models’abilities to represent the observed ocean variability and western boundary ***,the computational cost of these simulations is extremely large,and for these simulations to become routine,close collaborations with computer scientists are essential to ensure that numerical codes can take full advantage of the latest computing architecture.

关键词： ocean modeling numerical models horizontal resolution boundary currents

A new methodology for energy-based seismic design of steel moment frames

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2017年第1期16卷 131-152页

作者： Mebrahtom Gebrekirstos Mezgebo eric M. Lui Michael Baker International Hamilton NJ 08619 USA Department of Civil and Environmental Engineering Syracuse University Syracuse NY 13244-1240 USA

A procedure is proposed whereby input and hysteretic energy spectra developed for single-degree-of-freedom （SDOF） systems are applied to multi-degree-of-freedom （MDOF） steel moment resisting frames. The proposed procedure is verified using four frames, viz., frame with three-, five-, seven- and nine-stories, each of which is subjected to the fault- normal and fault-parallel components of three actual earthquakes. A very good estimate for the three- and five-story frames, and a reasonably acceptable estimate for the seven-, and nine-story frames, have been obtained. A method for distributing the hysteretic energy over the frame height is also proposed. This distribution scheme allows for the determination of the energy demand component of a proposed energy-based seismic design （EBSD） procedure for each story. To address the capacity component of EBSD, a story-wise optimization design procedure is developed by utilizing the energy dissipating capacity from plastic hinge formation/rotation for these moment frames. The proposed EBSD procedure is demonstrated in the design of a three-story one-bay steel moment frame.

关键词： energy-based seismic design hysteretic energy distribution MDOF systems steel moment frames story-wise optimization design

A Review on TSO-DSO Data Exchange,CIM Extensions and Interoperability Aspects

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2022年第2期10卷 309-315页

作者： Arsim Bytyqi Siddhesh Gandhi eric Lambert Nejc Petrovic European Network of Transmission System Operators(ENTSO-E) BrusselsBelgium Electricite de France(EDF) ParisFrance Elektro Gorenjska LjubljanaSlovenia

The exchange of information between transmission system operators(TSOs)and distribution system operators(DSOs)is a common ***,the evolution of the regulatory frameworks in Europe has increased the need for enhancing TSO-DSO data exchange and *** paper provides an overview of the TSO-DSO data exchanges and demonstrates the best practices using International Electrotechnical Commission(IEC)common information model(CIM),including the implementation of IEC common grid model exchange standard(CGMES),and discussion of the corresponding advantages,disadvantages,and ***,this paper evaluates and reports the activities already carried out within European projects,with particular focus on TSO-DSO ***,this paper concludes the need for TSOs and DSOs to rely on standard-based solutions when performing TSO-DSO data exchange,which enables the efficient operation and development of the future power systems.

关键词： Transmission system operator(TSO) distribution system operator(DSO) data exchange interoperability standardization common information model(CIM) common grid model exchange standard(CGMES)

Dirac-like cone-based electromagnetic zero-index metamaterials

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2021年第11期10卷 2048-2066页

作者： Yang Li C.T.Chan eric Mazur State Key Laboratory of Precision Measurement Technology and Instrument Department of Precision InstrumentTsinghua UniversityBeijingChina Department of Physics Hong Kong University of Science and TechnologyKowloonHong KongChina John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMAUSA

Metamaterials with a Dirac-like cone dispersion at the center of the Brillouin zone behave like an isotropic and impedance-matched zero refractive index material at the Dirac-point *** metamaterials can be realized in the form of either bulk metamaterials with efficient coupling to free-space light or on-chip metamaterials that are efficiently coupled to integrated photonic *** materials enable the interactions of a spatially uniform electromagnetic mode with matter over a large area in arbitrary *** unique optical property paves the way for many applications,including arbitrarily shaped high-transmission waveguides,nonlinear enhancement,and phase mismatch-free nonlinear signal generation,and collective emission of many *** review summarizes the Dirac-like cone-based zero-index metamaterials’fundamental physics,design,experimental realizations,and potential applications.

关键词： index collective realization