青海省地震前兆观测仪器故障原因及影响分析

对青海省地震局前兆仪器的整体运行情况进行了概述,对2010~2014年期间所运行前兆仪器出现的各种故障进行了统计、分析,发现故障出现的原因多为数采故障及供电系统故障等造成。对及时发现目前仪器运行存在的隐患、保证前兆设备正常运行提出了解决方案。     

陕西地震应急通信指挥车改造和系统集成的关键技术研究

针对"十五"地震现场卫星集成箱系统的诸多缺点,陕西省地震局进行了应急通信指挥车的车辆改造,将地震现场通信设备安装于应急车内,并对各业务系统进行了设计集成,提升了地震现场通信保障和应急指挥能力。本文介绍了地震应急通信指挥车改造和系统集成的关键技术及实际应用情况,分析了应急通信指挥车的优势,总结了实际应用中出现的问题并提出了解决方案。     

河北地震现场应急通信系统关键技术研究

为了确保地震现场通信通畅,保障地震现场应急救援工作顺利开展,中国地震局建设了一套基于卫星的应急通信网络,并为各省局配备了相关的便携设备。由于地震现场卫星集成箱系统在实际的使用中存在诸多不足之处,河北省地震局对其进行了集成改造,将便携站的全部设备安装于应急通信车内,并对地震现场应急通信所需各项业务进行系统集成。主要介绍了地震现场应急通信系统所涉及的各项关键技术,并对应用中出现的情况给出解决方案。     

海南省地震短波无线通讯网XD-D2B型单边带15瓦电台的使用与维护

海南省地震局各地震台,各市县地震局（办）绝大部分都使用ＸＤ－Ｄ２Ｂ型单边带１５Ｗ电台,成为全局使用和维护均居首位的短波无线通讯设备。１电台使用中的故障我局短波无线通讯网使用的天线大多是４４ｍ双极天线,架设中出现以下问题。①天线没有拉开。如文昌市地震台...     

河北地震前兆台网3G网络典型故障处理

针对河北省地震局前兆观测台网3G无线网络使用过程中出现的典型故障进行了系统的分析,给出了处理方法.通过总结这些典型故障案例的排障过程,提出了一种排除故障的模型流程,为今后实际工作中台站网络维护提供参考依据.     

台站电源远程管理单元的实现

由电源测控单元、短信平台及远程控管平台构成的上海市地震局台站电源远程管理单元,实现了对台站市电、UPS、电池组等设备状态的实时监控,对台站电池组的远程充放电功能,以及对台站电源故障的短信告警,为用户提供了可视化的台站电源状态报表,提高了用户对电源故障的处理效率和台站设备运行率。     

中国地震局工程力学研究所王涛研究员和中国地震灾害防御中心王东明副研究员应邀到山西省地震局作学术报告

正应山西省地震局和山西省地震学会邀请,中国地震局工程力学研究所王涛研究员和中国地震灾害防御中心王东明副研究员于2014年8月8日在山西省地震局举行了学术报告会。省地震局机关有关部门、预报中心、监测信息中心、省地震工程勘察研究院、省地震灾害研究所等下属事业单位60余人参加了报告会。各市地震局、专业台站也通过视频听取了报告,报告会由省地震局田勇副局长主持。     

开源网管系统在地震监测网络中的应用

使用Nagios、Cacti、NagVis等开源系统在天津市地震局行业网络中搭建开发了一套运行监控系统,可实现对区域内各类网络设备、仪器与服务的集中监控,同时建立于系统的故障报警与值班系统的联动机制,提高了网络环境中各专业台网整体运行监控与故障响应能力.     

山西省首届防震减灾法制经验交流会在并举行

2005年10月25日上午，中共山西省委依法治省领导组和山西省地震局在太原联合召开了全省首届防震减灾法制评比表彰暨经验交流大会，表彰了“四五”普法、依法治省以来在防震减灾法制工作中作出突出贡献的长治市地震局等30个先进集体和苗元礼、吴菊仙等60名先进工作者。受表彰的省人大常委会教科文卫工作委员会、省交通厅，长治市地震局、临汾市地震局、孝义市地震局等5个单位作了典型发言。     

基于卫星链路实现地震现场应急通讯技术系统公网接入

根据新疆地震局地震现场应急通讯实际工作情况,利用RouterOS技术,解决卫星链路VPN上网,该方法在不改变网络拓扑,基本不增加硬件的情况下,为地震现场设备以及地震现场人员提供了一种新的上网途径,详细叙述了设计方案和实现方法.     

A Monte Carlo study of rainfall forecasting with a stochastic model

A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities.     

Earthquake Engineering and Engineering Vibration Aims And Scope

正This journal is established by the Institute of Engineering Mechanics(IEM),China Earthquake Administration,to promote scientific exchange between Chinese and foreign scientists and engineers so as to improve the theory and practice of earthquake hazards mitigation,preparedness,and recovery.To accomplish this purpose,the journal aims to attract a balanced number of papers between Chinese and     

Foreword

Destructive earthquakes have caused great damage in China and the United States and collapsing buildings havecaused many deaths and injuries. The field of earthquake engineering studies earthquake hazards, the occurrence ofearthquakes of various magnitudes, the nature of the ground shaking during an earthquake, the vibration of structuresduring earthquakes, the strengthening of existing structures and the design of new structures to be earthquake resistant,and finally, how to cope with earthquake damage and restore a city to normal functioning. Such efforts are in progressin both countries, but unfortunately, the language barrier interferes with the free flow of information between China andthe Untied States. It would be mutually beneficial if some means could be developed to promote the exchangeof information across the Pacific Ocean. This new journal has been established for this purpose and its success willbe an important step in promoting earthquake engineering in China and the United States.     

WORLD ASSOCIATION FOR SEDIMENTATION AND EROSION RESEARCH(WASER)

正President:Giampaolo Di Silvio,Italy Vice Presidents:Ulrich C.E.Zanke,Germany Zhao-yin Wang,China The World Association for Sedimentation and Erosion Research(WASER),inaugurated on Oct.19,2004,is an independent non-governmental,non-profit organization.The mission of WASER is to promote international co-operation on the study     

Enhancing remote sensing research on global change to improve our understanding on Earth system processes

正Global Change includes climate change and other environmental changes caused by the joint interaction among various layers of Earth. From the positive side, global change provides new opportunities to human and other living forms on Earth. In the meantime, it creates tremendous challenges and negative impact. At present, the negative impacts have reached all primary processes of the global ecosystem and every aspect of human society, especially causing degradation of the ecosystem. For instance, intensive deforestation causes decline of biodiversity; global warming causes sea level rise and increases     

Solute concentrations in the lower niger river and the source rock contribution

Water quality analyses for the Niger River for the 1980/81 hydrological year are presented. The samples were collected from the main river at Lokoja, and from two main tributaries, the Kaduna and the Benue Rivers. Different water types were distinguished by the concentrations of major ions. The type Ca > Na > Mg > K - HCO₃ > SO₄ > Cl was represented at all stations during at least part of the year. Chloride was found to dominate the sulphate ion in the Kaduna and Niger, while the Benue maintained a higher concentration of sulphate relative to chloride all year round. Distinct patterns of seasonal variation in the ion concentrations were observed, particularly for the samples collected at Lokoja. Low ion concentrations were prominent during periods of high discharge, while low flow periods coincided with high dissolved ion concentrations. The contribution of rainwater to the total dissolved solids in the river waters was assessed indirectly using rainwater chemistry data from the Gulf of Guinea. The estimated rainwater contribution to the Lower Niger amounts to 5.15 mg 1^?1. Geochemical weathering calculations involving reactions of the four major minerals of granitic rocks - anorthite, biotite, albite, and K-feldspar - with carbon dioxide and water, can account for the average water composition of the Lower Niger. The proportion of the ionic components was also related to the occurrence of the respective element in the minerals.