面向对象数据库理论在专题地图数据库中的应用

本文介绍应用面向对象的思想对专题地图数据厍中专题数据、几何数据、拓朴数据进行有效管理的设想。     

固体废弃物遥感微机信息系统的建立及其应用研究

本文以沈阳市航空遥感图像解译出的固体废弃物堆放及具周围环境信息为基础数据,在IBM PC/XT微机上建立了固废遥感微机信息系统(MSWRSIS)。该系统可以对市区范围内的固废堆放情况进行高效准确地查询检索和综合统计。为固体废弃物的系统化微机化管理奠定了基础。该系统利用评分分级系统法对市区内现存的固体废弃物进行环境影响评价,并设计了程序。根据评价结果,可以选择较合理的固废堆放场地,并可提出优先管理的固废渣堆。     

Earthquake catalogue database of China

This article introduces the Earthquake Catalogue Database of China which is built on a VAX DBMS (it is called ECDC for short). The data of the ECDC are rather complete and accurate with scientific value. The structure of the ECDC contains the SCHEMA, STORAGE-SCHEMA and SUB-SCHEMAs n which are defined two records, five sets and six storage realms. There is an interface system for the users. This system has versatile capability, by which a common user can conveniently call on the database, to fetch data or to manipulate the data. Some special users can also access the database by DBQ, which is the query tool of the VAX DBMS, or can directly use the DML (Data Manipulation Language) that can be inlaid in high level programming languages.     

赤潮监测网络的数据库建模和系统实现

介绍一个典型的赤潮监测网络的数据库建模和系统实现，重点是数据库的逻辑建模，以及ERA模型在逻辑建模中的应用。在建模过程中，应用了数据库规范化理论，减少了冗余数据，提高了系统的可维护性。最后，简要说明了建立在数据库建模基础上的赤潮监测网络的系统实现。     

Development of a GIS-based monitoring and management system for underground coal mining safety

Coal mine safety is of paramount concern to mining industry. Mine accidents have various causes and consequences including catastrophic failure of mine, substantial economic losses and most notably loss of lives. Therefore, any initiative in mine monitoring is of vital importance for progressing safety surveillance and maintenance.This paper presents the development of a geographic information system (GIS)-based monitoring and management system for underground mine safety in three levels as constructive safety, surveillance and maintenance, and emergency. The developed model integrates the database design and management to the monitoring system implementation which encompasses query and analysis operations with the help of web and desktop applications. Interactive object-oriented graphical user interfaces (GUIs) were developed to visualize information about the entities gathered from the model and also to provide analysis operations based on the graphical representations and demonstrations using data tables and map objects.The research methodology essentially encompasses five main stages: (i) designing a conceptual database model; (ii) development of a logical model in terms of entity-relationship (ER) diagrams; (iii) development of a physical model based on physical constraints and requirements; (iv) development of GUIs and implementation of the developed model, analysis and queries; (v) verification and validation of the created model for Ömerler underground coal mine in Turkey. The proposed system is expected to be an efficient tool for improving and maintaining healthy standards in underground coal mines which can possibly be extended to a national GIS infrastructure.     

The magnitude of error in conventional bulk-sediment radiocarbon dates from central North America

Although the carbon-reservoir problem with bulk-sediment radiocarbon dates from lakes has long been recognized, many synoptic studies continue to use chronologies derived from such dates. For four sites in central North America, we evaluate chronologies based on conventional radiocarbon dates from bulk sediment versus chronologies based on accelerator mass spectrometry (AMS) radiocarbon dates from terrestrial plant macrofossils. The carbon-reservoir error varies among sites and temporally at individual sites from 0 to 8000 yr. An error of 500–2000 yr is common. This error has important implications for the resolution of precise event chronologies.     

首都圈地震前兆数据库系统的管理与维护

介绍了首都圈地震前兆数据库系统的数据库平台、数据库结构以及数据汇集与共享服务, 给出了首都圈地震前兆数据库系统数据库复制的维护经验。为保障首都圈二市一省的数字化前兆数据能及时、连续地汇集到首都圈地震前兆台网中心, 研制了一个数据传送软件, 以便在数据库复制出现故障时将数据从二市一省前兆台网中心传送到首都圈地震前兆台网中心。该软件的主要功能包括数据传送、数据显示和图形显示。     

陕西石泉-旬阳金矿带整装勘查区饶峰幅等7个图幅区1:50 000水系沉积物测量原始数据集

首次汇集了陕西石泉-旬阳金矿带整装勘查区内7个图幅1：50 000水系沉积物测量18种元素（Au、Cu、Zn、As、Sb、Hg、Bi、Ti、V、Ag、Sn、Pb、W、Mo、Ni、Co、Cr、Cd）的测试数据,共包含数据点13 169个,数据180 944个,第一次建立了该勘查区的地球化学数据库。在此基础上,编制了233张各类地球化学系列图件,并建立了空间数据库。通过本数据集在区内共圈定各类单元素异常2 083处,其中金元素异常304处;圈定金找矿靶区10处,金成矿远景区12处;经过后期矿产综合检查,整装勘查区内共发现金矿产（点）53处,其中,中型规模金矿床8处,小型规模金矿床18处,金元素异常与金矿床（点）对应程度较好,矿致异常达189处,显示1：50 000水系沉积物测量是勘查区内较好的找矿手段之一。     

甘肃省花牛山幅1:50 000矿产地质图数据库

甘肃省花牛山幅（K46E017023）1：50 000矿产地质图是根据《矿产地质调查技术要求（1：50 000）》和行业的统一标准及要求,在充分利用1：200 000、1：50 000等区域地质调查工作成果资料的基础上,采用数字填图系统进行野外地质专项填图,并应用室内与室外填编图相结合的方法完成的。本图对南华系-震旦系洗肠井群、寒武系西双鹰山组、奥陶系花牛山群的建造类型进行了重新划分,把图幅内侵入岩时代归纳为晚奥陶世—早志留世、泥盆纪、晚三叠世等3期,建立了岩浆岩的演化序列。本数据库包含12个地层单位和3期岩浆岩资料,数据量约为3.77 MB。这些数据充分反映了1：50 000矿产地质调查示范性成果,对该区矿产资源研究、能源勘探等具参考意义。