"矿山地震监测速报系统和分析预测研究"项目成果介绍

本文详细介绍了“矿山地震监测速报系统和分析预测研究”项目的立项背景、目标、所开展的主要工作、取得的成果、研究成果的社会效益和对该领域研究未来工作的展望。     

测绘地理信息数字档案盒技术探讨与实现

为适应测绘地理信息档案的管理需求,研发了电子归档系统。系统以最简单的操作将Word文档、dwg图件等各种档案数据进行转换,整合成单一的数字档案盒。系统综合应用电子身份认证、数字证书和电子签名等技术手段提升数据安全性。     

The response of benthic macrofauna to anthropogenic stress in Narragansett Bay, Rhode Island: a review of human stressors and assessment of community conditions

The present state of knowledge regarding the input of anthropogenic pollutants into Narragansett Bay, Rhode Island was reviewed and benthic infaunal communities present at four depositional environments within the upper Bay were characterized. Inter-station differences in species composition and abundance of these assemblages were examined in relation to established pollution gradients.Using diversity curves and multivariate statistics, evidence of significant anthropogenic impact on the structure of benthic macrofaunal communities in Narragansett Bay was identified. The magnitude of this impact was greatest at stations closest to the Bay’s urban centers, where exposure to multiple stressors had resulted in communities of opportunistic taxa which persisted in a state of low faunal diversity characteristic of early stages of species succession. As was expected based on historic models of faunal succession; the apparent maturity of benthic assemblages in Narragansett Bay increased along the north-south gradient of decreasing anthropogenic stress.     

用L波段备用接收机判别探空仪或雷达的故障

根据长沙高空气象探测站近几年来使用GTC2型探空数据接收机的经验,介绍了在台站L波段探测设备维修技术和维修仪器有限的情况下,利用接收机可快速判别L波段雷达、基测箱或探空仪的故障,并针对故障现象提出解决的办法.     

浅析GTS1探空仪零度层高度误差

该文通过GTS1型数字式探空仪在测温过程中,对零度层附近云的微物理特征及云物理过程作一些分析,认为GTS1型数字式探空仪在零度层有沾水误差的存在,对测得零度层高度有一定影响.     

地震预警实质的探讨

随着国家地震烈度速报与预警工程的开展,“地震预警”越来越进入公众的视线,国内外关于“什么是地震预警”的问题越来越多,对地震预警技术的解释也多种多样。本文论述了我国地震预警的进展,地震预警的实质和局限性。地震预警实质是地震观测进入密集观测新阶段,地震速报从分钟级发展到秒级超快地震速报,也就是地震警报。由于在地震预警实际应用中受预警盲区和地震强度估算不准确的局限,地震科学家对地震预警技术应用效能的认识也在不断加深和变化,逐步认识了发挥地震预警的警报作用的重要性。同时,地震预警是复杂的社会工程,引导公众认识地震预警的局限性,才能有效发挥减灾效能。