中国新疆温泉、哈萨克斯坦地下流体观测资料前兆异常对比与分析     

汪成国  朱成英  杨晓芳  赵刚  高守权  邹广  陈大柱  张新成 《内陆地震》2013,(3):229-234

系统清理分析了中国新疆温泉台、哈萨克斯坦20多年地下流体观测资料.统计结果显示,中国新疆温泉台30井（泉）的氡、流量、水温,哈萨克斯坦卡帕尔井的氦气、扎尔甘特井的流量、博古特井水位、下卡姆井的氦气、萨雷扎斯井水位,映震率较高,在震前都有一定的震兆异常显示,而且前兆异常特征以高值异常为主,异常时间分布特征显示为短期异常.  相似文献   

宝坻地震台地电阻率观测效能评价     

龚永俭  李旭东  陈嵩  胡雪琪 《内陆地震》2013,27(1):74-80

为了正确评价天津宝坻地震台地电阻率的观测效能,调查分析了宝坻地震台地电阻率观测场地和观测系统,统计分析了观测数据的产出和映震效能。结果表明:宝坻地震台地电阻率观测场地、观测系统等基本符合观测规范的要求;观测数据连续、可靠,但精度却有逐年下降的趋势;观测数据对华北北部多个5.0级以上地震和本区及邻近地区多个3.0级以上地震有震前异常反应。宝坻地震台地电阻率观测场地能反映出地震孕育的信息,产出的数据连续、可靠,映震能力较强,但随着城市建设进程的加剧,原良好观测环境有逐渐丧失的可能。  相似文献   

库尔勒地震台地震监测能力初探     

张小飞  赵建中  郭春生  张嘉敏 《内陆地震》2013,(4):383-388

主要选用库尔勒地震台测点单台地震目录,运用单台小震优势分布法、logN-M法和b值计算法然后采用M-△法对结果进行验证。对库尔勒台监测点300km范围内的地震监测能力进行了初步分析和讨论,确定库尔勒台监测点300km以内的控震能力;再依此方法确定了库尔勒附近的库米什台300km以内的地震监测能力。  相似文献   

格尔木地磁Z分量静日变化特征与前兆异常分析     

李延峰  朱胜伟  杨广华 《高原地震》2013,25(1):35-41

研究了格尔木地震台1996-2006年地磁模拟资料和2008-2011年的数字化资料,通过对台站磁静日低点时间、日变幅度、日变形态的分析,确认地磁z分量磁静日低点时间在地方时12时左右;日变幅月均值呈现明显的波浪式起伏变化,其年均值与太阳黑子数保持一致;地磁日变形态较为规则,有1个低点和2个高点;在前兆异常分析中,认为低点时间异常和日变形态双低点异常与周边强震具有一定的对应关系。  相似文献   

西宁地震台前兆观测干扰分析   总被引：2，自引：0，他引：2  

王永刚  李滔  马辉青  孙丽  丁宁霞 《高原地震》2013,25(2):26-30

对西宁地震台2008年1月至2013年5月各前兆测项受到的干扰情况进行了分析,认为周边环境以及气压突变和雷电等气象因素未造成干扰,存在的干扰主要是人为干扰和观测技术系统干扰。  相似文献   

A multicriteria spatial decision support system for solving emergency service station location problems     

Majid Esmaelian  Francisco J. Santos Arteaga  Sommayeh Mohammadi 《International journal of geographical information science》2013,27(7):1187-1213

Earthquakes occurring in urban areas constitute an important concern for emergency management and rescue services. Emergency service location problems may be formulated in discrete space or by restricting the potential location(s) to a specified finite set of points in continuous space. We propose a Multicriteria Spatial Decision Support System to identify shelters and emergency service locations in urban evacuation planning. The proposed system has emerged as an integration of the geographical information systems (GIS) and the multicriteria Decision-Making method of Preference Ranking Organization Method for Enrichment Evaluation IV (PROMETHEE IV). This system incorporates multiple and often conflicting criteria and decision-makers’ preferences into a spatial decision model. We consider three standard structural attributes (i.e., durability density, population density, and oldness density) in the form of spatial maps to determine the zones most vulnerable to an earthquake. The information on these spatial maps is then entered into the ArcGIS software to define the relevant scores for each point with regards to the aforementioned attributes. These scores will be used to compute the preference functions in PROMETHEE IV, whose net flow outranking for each alternative will be inputted in ArcGIS to determine the zones that are most vulnerable to an earthquake. The final scores obtained are integrated into a mathematical programming model designed to find the most suitable locations for the construction of emergency service stations. We demonstrate the applicability of the proposed method and the efficacy of the procedures and algorithms in an earthquake emergency service station planning case study in the city of Tehran.  相似文献   

Integration of air pollution data collected by mobile sensors and ground-based stations to derive a spatiotemporal air pollution profile of a city     

Yee Leung  Yu Zhou  Ka-Yu Lam  Tung Fung  Kwan-Yau Cheung  Taehong Kim 《International journal of geographical information science》2013,27(11):2218-2240

ABSTRACT

Air pollution has become a serious environmental problem causing severe consequences in our ecology, climate, health, and urban development. Effective and efficient monitoring and mitigation of air pollution require a comprehensive understanding of the air pollution process through a reliable database carrying important information about the spatiotemporal variations of air pollutant concentrations at various spatial and temporal scales. Traditional analysis suffers from the severe insufficiency of data collected by only a few stations. In this study, we propose a rigorous framework for the integration of air pollutant concentration data coming from the ground-based stations, which are spatially sparse but temporally dense, and mobile sensors, which are spatially dense but temporally sparse. Based on the integrated database which is relatively dense in space and time, we then estimate air pollutant concentrations for given location and time by applying a two-step local regression model to the data. This study advances the frontier of basic research in air pollution monitoring via the integration of station and mobile sensors and sets up the stage for further research on other spatiotemporal problems involving multi-source and multi-scale information.  相似文献   

大西铁路电气化牵引站负序电流及谐波对山西中部电网的影响     

史燕 《中国勘察设计》2012,(1):96-100

大同至西安铁路客运专线是国家铁路客运通道网络的重要组成部分,也是山西省重点建设工程项目之一。本文对大西铁路在山西中部的四所牵引站投产后所产生的负序及谐波分析研究,结果表明部分牵引站并网后会超过国标规定的允许值,对电力系统及其它用户产生危害。建议相关部门采取有效的防治措施。  相似文献   

无线气象站数据与人工观测蒸发量的资料同化——以白鹤滩电站坝址区数据为例     

夏铭辉 《水文》2012,(4):63-66

在MATLAB中使用最小二乘法拟合Goff-Gratch公式,得到关于气温的饱和水汽压函数。无线气象站观测得到的气象资料结合人工观测蒸发量,在MATLAB中进行回归分析,得到基于彭曼公式的日水面蒸发量计算公式。算例表明,与无线气象站的蒸发量计算值相比,回归分析得到的日水面蒸发量公式计算值与人工观测值能够同步对比。无线气象站资料和人工观测资料能够资料同化,适合在工程中推广。  相似文献   

宁波地铁试验段深基坑施工技术研究          下载免费PDF全文

董建忠  林克芳 《探矿工程》2012,39(3):59-65

针对宁波地铁1号线试验段福庆北路站基坑开挖面积大、围护类删多、支撑形式多样、歼挖深度深、绵构彤式复杂等特点,通过对其深基坑施工技术进行研究,并对其基坑在开挖过程中的监测数据进行变形分析,总结出可供宁波市其他同类型地铁车站及深基坑施工借攀和参考的经验。  相似文献