大型数据平台搭建技术在地震行业中的应用与研究

依据地震行业业务系统的数据处理和存储需求,提出了数据模型和数据平台建设思路。结合地震行业网中数据平台的建设,在国家中心、区域中心和台站节点分别采用了相应的数据库平台和数据存储平台技术,设计了各类节点的数据备份策略,实现了满足海量数据流高效运行的大型数据平台。     

基于应急基础数据库的城市防震减灾能力评价指标研究

城市防震减灾能力是一个涉及因素众多的复杂体系,对它的评估也是涉及到地震科学、社会科学和经济科学的交叉学科问题。对城市承受地震灾害能力进行科学合理的评估并有针对性的加强其薄弱环节是减轻城市地震灾害的有效方法之一。在已有的防震减灾能力评价体系研究的基础上,利用现有的地震应急基础数据库数据项,提出一个简化的城市防震减灾能力指标体系,快速评估城市的防震减灾能力。     

Characteristics of horizontal ground motion measures along principal directions

<正>Ground motion records are often used to develop ground motion prediction equations(GMPEs) for a randomly oriented horizontal component,and to assess the principal directions of ground motions based on the Arias intensity tensor or the orientation of the major response axis.The former is needed for seismic hazard assessment,whereas the latter can be important for assessing structural responses under multi-directional excitations.However,a comprehensive investigation of the pseudo-spectral acceleration(PSA) and of GMPEs conditioned on different axes is currently lacking.This study investigates the principal directions of strong ground motions and their relation to the orientation of the major response axis, statistics of the PSA along the principal directions on the horizontal plane,and correlation of the PSA along the principal directions on the horizontal plane.For these,three sets of strong ground motion records,including intraplate California earthquakes,inslab Mexican earthquakes,and interface Mexican earthquakes,are used.The results indicate that one of the principal directions could be considered as quasi-vertical.By focusing on seismic excitations on the horizontal plane,the statistics of the angles between the major response axis and the major principal axis are obtained;GMPEs along the principal axes are provided and compared with those obtained for a randomly oriented horizontal component;and statistical analysis of residuals associated with GMPEs along the principal directions is carried out.     

安徽省震中快速定位查询系统

基于VB6.0软件开发平台,以MapInfo GIS软件为数据支撑平台,建立了安徽省震中快速定位查询系统。系统主要实现了震中快速定位查询显示功能、基于GIS数据的空间分析和定量计算分析功能。为地震应急响应提供辅助决策,为震后资源调度、伤员输送、人员疏散等提供科学信息,提高了应急救援的效率。     

前兆数据库备份软件开发与应用

根据实际工作中前兆数据库的备份,研究了数字化地震前兆数据库的自动备份方法,解决了日常数据库备份过程中影响数据访问、占用大量备份时间、容易出现备份失败等问题。主要介绍了前兆数据库自动冷备份软件功能设计和实现、开发流程、运行环境。该软件提高了数据库备份效率,方便数据库迁移,工作中该软件运行稳定,保证了备份数据的完整性和一致性。     

基于Jfreechart的地震前兆数据展示系统

通过Java编程语言和Jfreechart图表控件,设计并实现了多台站、多测项的地震前兆数据展示系统,能迅速的绘制较长时间跨度的大量数据,并实现了常用的分析处理方法,提高了地震监测预报研究人员的工作效率.     

云南地壳形变与丽江7.0级地震

本利用滇西、滇中地区大地垂直形变和跨断层短水准、短基线的监测资料进行综合分析论证，其结果表明：１９９６年２月滇西丽江７．０级地震前，该区应力场方向自１９９０年以来产生了由北东－北西的转变，震源区出现高达１０９ｍｍ的垂直差异运动１９９３－１９９６年有７５％的断层形变测点相继出现不同程度的中期、短期和临震异常。大地垂直形变与断层形变的共性演变特性，为强震的预测提供了一个较好的震例。     

Influence of long‐period filter cut‐off on elastic spectral displacements

The effect of the long‐period filter cut‐off, T_c, on elastic spectral displacements is investigated using a strong ground‐motion database from Europe and the Middle East. The relation between the filter and oscillator responses is considered to observe the influence of T_c for both analogue and digital records, and the variations with site classification, magnitude, filter order and viscous damping. Robust statistics are derived using the re‐processed European data to generalize the effects of the long‐period filter cut‐off on maximum oscillator deformation demands as a function of these seismological and structural features. Statistics with a 95% confidence interval are derived to suggest usable period ranges for spectral displacement computations as a function of T_c. The results indicate that the maximum period at which spectral displacements can be confidently calculated depend strongly on the site class, magnitude and filter order. The period range where reliable long‐period information can be extracted from digital accelerograms is twice that of analogue records. Copyright © 2006 John Wiley & Sons, Ltd.     

M5 model tree based modelling of reference evapotranspiration

This paper investigates the potential of M5 model tree based regression approach to model daily reference evapotranspiration using climatic data of Davis station maintained by California irrigation Management Information System (CIMIS). Four inputs including solar radiation, average air temperature, average relative humidity, and average wind speed whereas reference evapotranspiration calculated using a relation provided by the CIMIS was used as output. To compare the performance of M5 model tree in predicting the reference evapotranspiration, FAO–56 Penman–Monteith equation and calibrated Hargreaves–Samani relation was used. A comparison of results suggests that M5 model tree approach works well in comparison to both FAO–56 and calibrated Hargreaves–Samani relations. To judge the generalization capability of M5 model tree approach, model created by using the Davis data set was tested with the datasets of four different sites. Results from this part of the study suggest that M5 model tree could successfully be employed in modeling the reference evapotranspiration. Further, sensitivity analysis with M5 model tree approach suggests the suitability of solar radiation, average air temperature, average relative humidity, and average wind speed as input parameters to model the reference evapotranspiration Copyright © 2009 John Wiley & Sons, Ltd.     

中晚全新世江汉平原沔城地区古人类活动的湖泊沉积记录

将１９８０－１９９４年间全国２５个省（市、区）５７座水库渔业资源调查数据在计算机上运用ＳＹＳＴＡＴ软件初步建立基础数据库,对水库形态与自然环境,水的理化性质,生物学等三大层次５２项指标进行了初步统计分析。结果表明,山谷、丘陵和平原型水库座数比约为３：６：１,各种类型水库平均鱼产量以及小型山谷型最高,中型平原型最低。各指标值的分布差别较大,三大层次中变异最小的指标分别为竣工年份（ＦＹＰ）、ｐＨ值（ｐ