地震行业地面骨干网与应急卫星通信网互联路由设计方案的探讨

本文介绍了地震行业地面骨干网与应急卫星通信网的运行现状及互联存在的路由问题,讨论了实现两网互联的路由设计目标和策略,根据OSPF协议与BGP协议的特点和适用范围,提出了统一互联的接入方法,以及联合使用OSPF和BGP协议解决两网互联路由问题的具体方案,经网络仿真平台测试证明,该方案切实可行,效果良好。     

Nitrates as indicators of aquifer interconnection. Application to the Campo de Dalías (SE – Spain)

 Relatively high concentrations of NO₃ usually have their origin in processes of organic pollution and excessive use of inorganic fertilizers. In the case of agricultural areas, these activities may generate great quantities of nitrates. This fact has enabled us to use the nitrate ion to characterize an exploited aquifer unit of a very complex aquifer system, as is the case for the Campo de Dalías aquifer system (SE Spain). The shallow boreholes, which draw water from intensively cultivated superficial formations, yield waters with a high NO₃ content. When the boreholes are deeper and penetrate low-permeability formations in the superficial layers, the waters contain little NO₃; similar to what happens in areas of recharge where agricultural activities are absent. In addition, using longitudinal sections, it is possible to demonstrate the possible existence of connections between superficial and deep aquifers using NO₃ as a tracer. Similarly one can locate those sectors responsible for contamination caused by the poorly lined boreholes themselves, when they perforate more than one aquifer in a multiple aquifer formation. Received: 22 December 1998 · Accepted: 20 March 1999     

CORS信息资源共享中的异构问题研究

从系统优化的观点,分析了CORS系统中信息资源共享中的异构问题;针对CORS异构问题详细分析了其特性,并提出了主要解决方案.     

微机Netware网络与SUN工作站的互联

本文从介绍ＴＣＰ／ＩＰ和ＮＦＳ的的概念产手，讨论了微机Ｎｅｔｗａｒｅ网络一ＳＵＮ工作站的互联方法。     

山西省地震应急视频会议系统建设与应用

文章主要对山西省地震视频会议系统的建设、组网、运行维护做简要介绍,并对该系统在应急协同、政务会议、震情会商、远程培训等方面的具体应用进行阐述,进一步明确视频会议系统在地震应急中的作用。