滁州市地震小区划震害预测信息管理系统     

马犇  谢庆胜  张洁  万杰  刘世靖  何琳 《地震地磁观测与研究》2014,(3):263-269

为了提升城市防震减灾能力,建立滁州市地震小区划 GIS 基础数据库,开发了基于 GIS 平台的滁州市地震小区划、震害预测信息管理系统,用于数据展示,并统一管理。系统采用 Super-Map Objects 6R 组件式开发,包括滁城概况、地震小区划成果、震害预测成果、震灾防御对策和系统管理5大模块,实现系统对数据的有效管理,充分发挥 GIS 功能对空间数据管理的作用。  相似文献   

JOPENS系统汇集REFTEK实时数据的实践应用     

杨军  袁松湧  金明培  李孝宾  叶泵  芮文军 《地震地磁观测与研究》2014,35(5):288-293

以下关虚拟地震台网为例,介绍利用JOPENS系统汇集REFTEK系统实时数据流的实验及数据汇集的相关步骤,通过宾川人工爆破实验,检验数据汇集系统在地震定位方面的可靠性.  相似文献   

Present stage of recent crustal movements and seismicity within Greater Cairo area, Egypt     

Abdel-Monem S. Mohamed  Gad-Elkareem A. Mohamed  Khaled Omar  Abou-Aly Nadia 《Journal of Seismology》2014,18(1):23-35

Greater Cairo and the Nile Delta are considered very important, high-density population areas. The subject of the research work is dealing with recent crustal movements and its relation to seismicity and tectonics setting. A Global Positioning System (GPS) network consisting of 11 benchmarks covering Greater Cairo and the southern part of the Nile Delta was established in 1996. Different campaigns surveyed the network. In this study, we used ten measurements collected during the period from 2004 to 2010. The data were processed using Bernese 5.0 software to derive velocity vectors and principal components of crustal strains. The horizontal velocity varies in average between 3 and 6 mm per year across the network. Rate of the accumulated strains in the southern part of Greater Cairo varies from low to moderate. The low strain rates and low level of earthquakes occurrence in the present interval in the Nile Delta area indicated that the rate of the deformation in this area is small. The result from coupling GPS and seismic data indicates that the southern part of the area is seismo-active area when compared with the other parts in the network areas. The paper gives information about the present state of the recent crustal movements within Greater Cairo area to understand the geodynamics of that area. This study is an attempt to build a basis for further development of seismic catastrophic risk management models to reduce a risk of large catastrophic losses within the important area.  相似文献   

Assessment of Haloacetic Acids in Drinking Water in Bizerte,Tunisia          下载免费PDF全文

Bechir Hammami  Sihem Ben Hessin  Mohamed Bahri  Mohamed Ridha Driss 《洁净——土壤、空气、水》2014,42(8):1052-1059

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The effects of kinetic sorting on sediment mobility on steep slopes          下载免费PDF全文

Vito Bacchi  Alain Recking  Nicolas Eckert  Philippe Frey  Guillaume Piton  Mohamed Naaim 《地球表面变化过程与地形》2014,39(8):1075-1086

In poorly mobile static armour, sorting is usually considered the result of hiding/exposure effects. We called this effect ‘static sorting’ in opposition to very efficient grain‐to‐grain mechanisms produced by a mobile mixture, called ‘kinetic sorting’. We hypothesized that kinetic sorting can be an important contributor to the morphodynamics of mountain streams and attempted to demonstrate this with new flume experiments. Two long runs were produced with natural poorly sorted sediments, and with transport stages of the coarse fraction (defined by the ratio between the shear stress and the critical shear stress for transport), smaller and higher than 1, respectively. Both runs produced an efficient transfer downstream of the injected material, but with a major difference: the first run (no kinetic sorting) produced permanent armour figuring clusters, akin to what has already been observed in similar experiments; the second run (with kinetic sorting) also produced bed armouring, but this armour was periodically totally destroyed, leading to substantial bed erosion. This phenomenon was explained by kinetic sorting, the effects of which are to produce an efficient downward migration of fine materials and bed surface armouring. The consequence is that fine materials are hidden to the flow during aggradation, allowing the slope to attain values much steeper than would have been expected at equilibrium for the mixture. However, whereas the surface armouring tends to stabilize the bed, construction of a layer of fine sediments at the subsurface also contributes to making it very unstable. These two contradictory effects explain the complex bed behaviours and the existence of very large bedload and slope fluctuations. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   

The discovery of an M4+T8.5 binary system     

Ben Burningham  D. J. Pinfield  S. K. Leggett  C. G. Tinney  M. C. Liu †  D. Homeier  A. A. West  A. Day-Jones  N. Huelamo  T. J. Dupuy  Z. Zhang  D. N. Murray  N. Lodieu  D. Barrado y Navascués  S. Folkes  M. C. Galvez-Ortiz  H. R. A. Jones  P. W. Lucas  M. Morales Calderon  M. Tamura 《Monthly notices of the Royal Astronomical Society》2009,395(3):1237-1248

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Evolution of hard gluons in a medium with q^(t)∼tn and the thermalization problem     

Felipe Gregoletto Ben  Magno V. T. Machado 《Astronomische Nachrichten》2024,345(2-3):e230186

We study the energy distribution of hard gluons traversing a dense quark-gluon plasma by comparing various transverse momentum broadening rates , using a probabilistic perturbative approach. These results were applied to address the thermalization problem in heavy ion collisions. Within the weak coupling model, thermalization follows a “bottom-up” process: early-formed high-energy partons emit low-energy gluons, leading to their equilibrium formation, creating a thermal bath that facilitates equilibrium in the high-energy sector. Under this scenario, we model the time dependencies of $$ as a power-law $$, and assess the impact of $$ on the distribution of hard gluons passing through the medium.  相似文献