绝对重力基准点的重复测量

简要介绍了中国地壳运动观测网络工程基准网中的绝对重力重复测量。给出了两次观测结果的互差 ,其观测精度优于 5× 10 -8m·s-2 ,达到了网络工程设计要求。对一些基准点的重复观测资料进行了初步分析和讨论 ,并对继续开展以后的工作提出了建议。     

旅游网站的性能及其发展态势

 本文对旅游网站的基本概念的内涵及我国旅游网站的演变过程进行了剖析,通过由Yahoo搜索的我国旅游网站的资料,对我国现状旅游网站的类型进行了划分,“内容、方式、功能、规模”四大问题进行了探讨,对中国旅游网站的联邦式的“一统”化中的三个结合趋势、依托传统行业实体和专业产业资源后盾发展电子商务,在信息化基础上提高对使用关系的管理水平进行了展望。旅游网站作为网络经济形势下旅游业发展的一种战略武器,已对我国旅游市场的固有壁垒带来冲击,我国旅游电子商务在未来的发展中尚有许多工作要做     

上海地区GPS综合应用网数据采集处理中心及其自动化处理软件简介

上海地区GPS综合应用网的数据采集处理中心设立在上海天文台 ,经过两年多的实时运行 ,网络设备及处理计算机等相对稳定 ,处理软件也渐趋成熟和完善 ;介绍了GPS数据采集处理中心的网络结构、数据自动化处理软件。     

Seeing the forest and the trees: Facilitating participatory network planning in environmental governance

Governance processes to address environmental change involve many different actors from multiple spatial, temporal and socio-political scales, not all of whom are connected by hierarchy and whose actions cannot always be mandated. In the environmental governance literature, Social Network Analysis (SNA) has been found useful in understanding complex governance arrangements. In this paper we present and reflect on our experience with the Net-Map tool for participatory network mapping. The Net-Map tool was applied in three transdisciplinary case studies for three different purposes: (a) to contribute to an improved understanding of biodiversity knowledge flows in Europe, (b) to explore the interplay between actors with influence on water, agriculture, and energy developments at the Blue Nile in Ethiopia, and (c) to understand the challenges facing stakeholders engaged in conservation and economic development in a Southeast Asian mountain range. The case studies explore how network maps can serve as boundary objects to engage stakeholders of diverse points of view and jointly design strategies to address governance challenges. More specifically they show how network maps are used to gain a better understanding of governance situations, to help stakeholders identify strategies for navigation of the complex networks in which they are embedded and to support transdisciplinary research processes. We close with some reflections on the potential and limitations of the Net-Map tool in facilitating multi-stakeholder processes and disentangling complex governance arrangements.     

A review of the National Groundwater Monitoring Network in Korea

The drastic expansion of cities and the rapid economic growth in Korea have caused dramatic increases to demand from groundwater supplies for drinking, domestic, agricultural and industrial water usage. The Ministry of Construction and Transportation and the Korea Water Resources Corporation have constructed and operated the National Groundwater Monitoring Network (NGMN) throughout the country since 1995. The NGMN, an official project establishing a total of 320 groundwater monitoring stations, was completed in 2005. Each national groundwater monitoring station serves as a baseline and primary station to monitor long‐term general trends in water‐level fluctuations and in groundwater quality. The present NGMN and its monitoring capabilities were evaluated to enhance the efficiency of groundwater monitoring and to meet the new societal conditions. Based on reviews and evaluations, some suggestions and recommendations are made with regard to improvements of the national network, including the installation of rainfall gauges in groundwater monitoring stations, gathering groundwater data every hour instead of every 6 h as at present, involving major cations and anions in the regular and periodic chemical analyses, regular periodic analyses of collected groundwater data, and construction of 199 additional groundwater monitoring stations to supplement the existing groundwater monitoring network. Copyright © 2006 John Wiley & Sons, Ltd.     

面向连接的SOCKET编程与通信软件的设计

介绍了ＳＯＣＫＥＴ的基本概念和编程原理。对ＵＮＩＸ网络下如何利用面向连接的ＳＯＣＫＥＴ编程实现客户机、服务器进程间通信进行了分析并给出了程序实例     

辽宁数字地震观测系统总体功能

本文通过对辽宁数字地震观测系统中的台网布局、台站基本参数、观测动态范围以及整个台网的监测能力、台网中心的功能等方面的介绍,阐述了整个辽宁数字地震观测系统的总体功能。     

GIS分布式技术的应用模型分析与展望

分布式GIS是解决跨平台、跨地域实现多软件平台及远近程数据与系统互操作的有效途径。本文阐述了若干个主要分布式GIS的实现技术手段和方案,探讨了各技术方案的应用状况和发展趋势。     

Urban environmental services and the state in East Africa; between neo-developmental and network governance approaches

Although governments are generally expected to provide environmental services such as sanitation and solid waste collection for their citizens, most (municipal) governments in Sub-Saharan Africa seem hardly able to take up this task. Without ignoring the lack of material resources resulting from poverty, there are other structural causes for this failure as well and related to the role of the state. Since independence, the state in Africa has been debated in political as well as in academic circles and opposing views can still be discerned today. While some promote a strong interventionist state which can effectively enhance development, others consider introducing network governance by involving various societal actors in combination with different levels of government a more promising alternative. After presenting an historical overview, in this paper I will summarize this debate and discuss future options for East African authorities for providing more effective and sustainable urban environmental infrastructures and services.