在AutoCAD环境下不规则三角网构建及等高线生成

对不规则三角网的生成进行了分析,在AutoCAD环境下使用三角形生成算法,将离散点构建成不规则三角网,并在此三角网的基础上生成相应的等高线.     

提高城市大比例尺地形图转换到CGCS2000精度的探讨

针对在进行城市坐标系中的大比例尺地形图转换到CGCS2000中,采用统一区域坐标转换模型进行整体转换,将会使地形图在转换后的精度不能满足成图精度要求,提出了通过对区域内的所有控制点进行兼容性检测,剔除不能满足精度要求的点后,对所有控制点构建TIN,然后采用仿射变换模型分块对各三角形内的大比例尺地形图进行转换,从而实现提...     

山西数字测震台网监测能力及其构造意义

通过对山西数字测震台网不同时期的监测能力进行对比,发现,台网的监测能力在不断地提高。对山西省地区的监控能力达到2.0级,大同盆地、太原盆地的监控能力达到1.5级,忻定、临汾、运城盆地的监控能力达到1.5～2.0级。说明山西数字测震台网的建设从布局上侧重了对山西活动构造的监测,目前对山西大部分活动断裂带的监测能力都在1.5级,对今后的地震监测预报研究和防震减灾工作有着重要的意义。     

山西数字地震台网地震自动定位系统运行分析

选取2009年7月至2010年8月山西地震台网速报软件的自动定位结果与＂十五＂Jopens系统人机交互处理的定位结果进行对比分析,得出,速报软件自动定位地震参数与人机交互处理的编目结果基本吻合,可以作为地震速报的依据和参考。     

基于VMware Esxi软件的服务器虚拟化技术在天津地震监测网络中的应用

服务器虚拟化技术是信息网络系统重点研究和发展方向,本文阐述了VMware Esxi服务器虚拟化软件和EMC系统在天津地震监测网络系统中的初步集成应用情况,旨在利用低成本的虚拟化技术,实现地震系统中服务器资源共享,提升业务系统和数据的安全性,节能降耗,并为区域中心实现服务器虚拟化应用提供参考。     

基于标准差准则的海底三维地形模型构建

针对现有三角剖分需要投影到平面,局部优化时属性丢失的问题,本文采用一种顾及水深属性的三角剖分准则——标准差准则进行三角剖分,并且讨论了标准差的含义、标准差的计算以及标准差准则的描述.根据标准差准则,实现了一种基于标准差差则的海底三维地形模型构建方法.实验结果表明该方法提高了三角剖分的合理性,模型重建的细节与精确程度更高...     

Environmental awareness,the Transition Movement,and place: Den Selvforsynende Landsby,a Danish Transition initiative

The Transition Movement, originating in Ireland and the United Kingdom, gathers and supports community-led actions to meet the global challenges of climate change, peak oil and energy descent. In our study we analysed a Transition Network project, a Danish village built from scratch by its inhabitants and named the Self Sufficient Village (SSV). Employing the theories of constructed landscapes and place attachment, we studied how the Transition Movement ideology shaped the constructed landscape of the village and influenced the inhabitants’ attachment. The research team, following the grounded theory approach, conducted a field study staying in SSV. We collected data with focus groups, individual interviews and participatory observations, taking part in daily life of the community. The analysis revealed three, intertwined themes which altogether create the constructed landscape of SSV. They were named Community, Ideology, and Individual impact, respectively. Our findings showed that the community and strong social ties were predominant factors in shaping place attachment. Transition ideology and environmental awareness, although less pronounced, still turned out to be vital for the feelings of belongingness and empowerment, resulting in a positive impact of the village on the local scale. Using our case study as an example we discuss the importance of environmental concern and place attachment for similar grass-root initiatives.     

Characteristics of Channeling Flow in Cultivated Horizon of Saline Rice Soil

1 Introduction The preferential flow tends to result in the loss of irriga- tion water and nutrients. The formation of the preferen- tial flow was caused by various factors, such as soil structure, tillage, worm cavity and root channeling rup- ture (Pot et al., 2005). Besides, frozen rupture can not be ignored in the northeastern China where the lowest tem- perature reaches -40℃ (Wang et al., 1993). There are several types of preferential flow, such as bypass flow, channeling flow and macro…     

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