浅谈"数字城市"在城市建设中的重要性

数字城市是信息社会重要的组成部分。利用3S（GPS、GIS、RS）技术、4D（DEM、DOM、DRG、DLG）产品、多媒体技术等，进行电子商务、城市规划、建设和管理。是测绘工作的发展模式和生存方式     

Modeling endogenous learning and imperfect competition effects in climate change economics

In this two-part paper we evaluate the effect of “endogenizing” technological learning and strategic behavior of agents in economic models used to assess climate change policies. In the first part we show the potential impact of R&D policies or demonstration and deployment (D&D) programs in the context of stringent stabilization scenarios. In the second part we show how game-theoretic methods can be implemented in climate change economic models to take into account three types of strategic interactions: (i) the market power of the countries benefiting from very low abatement costs on international markets for CO₂ emissions, (ii) the strategic behavior of governments in the domestic allocation of CO₂ emissions quotas, and (iii) the non-cooperative behavior of countries and regions in the burden sharing of CO₂ concentration stabilization. The two topics of endogenous learning and game-theoretic approach to economic modeling are two manifestations of the need to take into account the strategic behavior of agents in the evaluation of climate change policies. In the first case an R&D policy or a demonstration and deployment (D&D) program are put in place in order to attain a cost reduction through the learning effect; in the second case the agents (countries) reply optimally to the actions decided by the other agents by exploiting their strategic advantages. Simulations based on integrated assessment models illustrate the approaches. These studies have been conducted under the Swiss NCCR-Climate program.     

Shaking table tests on seismic response of steel braced frames with column uplift

Previous studies have suggested that rocking vibration accompanied by uplift motion might reduce the seismic damage to buildings subjected to severe earthquake motions. This paper reports on the use of shaking table tests and numerical analyses to evaluate and compare the seismic response of base‐plate‐yielding rocking systems with columns allowed to uplift with that of fixed‐base systems. The study is performed using half‐scale three‐storey, 1 × 2 bay braced steel frames with a total height of 5.3 m. Base plates that yield due to column tension were installed at the base of each column. Two types of base plates with different thicknesses are investigated. The earthquake ground motion used for the tests and analyses is the record of the 1940 El Centro NS component with the time scale shortened by a factor of 1/√2. The maximum input acceleration is scaled to examine the structural response at various earthquake intensities. The column base shears in the rocking frames with column uplift are reduced by up to 52% as compared to the fixed‐base frames. Conversely, the maximum roof displacements of the fixed and rocking frames are about the same. It is also noted that the effect of the vertical impact on the column associated with touchdown of the base plate is small because the difference in tensile and compressive forces is primarily due to the self‐limiting tensile force in the column caused by yielding of the base plate. Copyright © 2006 John Wiley & Sons, Ltd.     

福建数字遥测台网单台震级偏差研究

使用福建数字遥测台网产出的观测报告,计算各台站单台震级与台网平均震级偏差和标准离差,分析了产生震级偏差的原因,并给出了台基校正值。结果显示,震级偏差主要来自于各台站的综合影响,进行台基校正是有意义的。     

计算机技术(CGIS)在地质报告中的应用

CGIS数字地质报告编制软件最大、最重要的功能就是根据原始数据(如钻探资料、测量、测井和观测点数据)自动或者人机交互生成相关地质图形的功能,以及对图形的动态修改功能。自动成图功能大大缩短了地质图件的成图周期。     

基于C/S模式的工程勘察图件信息管理系统设计

文中介绍了一个基于C/S模式的工程勘察图件信息管理系统的功能结构、设计思想及实现技术。该系统以单位局域网为依托,按客户机/服务器(C/S)模式实现图件的数据库组织与管理。其中服务器端在实现对图件信息进行数据库管理的同时,通过建立远程数据组织,并选择合适的数据集和与之对应的数据库连接组件,为客户端提供服务。客户端使用DCOM通信协议与服务器进行通信,并通过客户端的数据集提供者组件实现客户端与数据服务器的连接与访问。系统的实现为所在单位大量的岩土工程勘察图件提供了一个安全、可靠、使用方便的管理模式。并将单位的图件管理由分散的计算机管理变成有组织的集中管理,从而提高了图件的利用率和应用价值。     

基于小波的图像插值方法

本文在分析已有插值基函数和小波函数、小波变换的基础上提出一种应用小波作为插值基函数进行图像插值的方法,给出了该方法在一般图像插值方面在多幅图像的信息揉合和累积方面的应用,并分析了一般图像插值方法在图像之间存在辐照度差异时的可行性和在同名点之间存在相对空间信息差异时的操作方法。最后,采用４幅ＰＯＬＤＥＲ多角度遥感图像对本文所述方法进行了验证。实验表明,本文所述方法是可以较好地进行图像插值的。     

地震科技信息的优化管理与数据库的建立和应用

天津市地震局从贯彻执行国家地震局预测预防司的有关文件做起,结合其地震科技信息工作的特点,从优化管理入手,借助现代化的工具和手段,建立了文献管理数据库,并在实践中加以应用,以增强服务功能,更好地为防震减灾服务。     

柴达木盆地周边的几个金矿区遥感构造和地球物理场特征

青海柴达木盆地周边地区的金矿化分布,与其所在区域的岩石建造、岩浆活动和区域构造以及区域航磁、重力场特征的关系密切。同时金矿区、矿化集中区显示出醒目的反映局部构造环境的弧形和线性构造,即以强烈剪切作用形成的线性构造带和反映有后期岩浆分异侵入的环形构造。而且矿区、矿化集中区还位于反映深部构造变异的局部重力异常区边缘、区域航磁走向中断区或梯度变化带附近。这些遥感构造和地球物理场中的局部异常,是进一步找矿评价的重要标志。金矿床常位于上述异常区的边缘及控矿的早期封闭构造系统的隐约线性构造带内。在地质背景研究基础上,遥感构造研究和地球物理资料相结合是进行金矿区、矿化集中区成矿预测的一种快速、有效的重要方法。     

填土地基强夯试验监测研究

本文简要介绍福建漳州某地填土地基强夯试验监测项目,利用钻探、原位测试及孔隙水压力、水平位移、螺旋沉降、磁性分层沉降、水位及沉降标观测等试验监测手段,对强夯加固填土地基试验进行监测研究,并对强夯效果作出评价。