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MAPGIS与Oracle数据库空间数据格式的转换 总被引:1,自引:0,他引:1
MAPGIS软件支持多种GIS数据交换,且其明码数据格式较全面、清晰,易于读写。本文以MAPGIS明码数据格式和Oracle数据库为例,研究通过编程实现ASCII码格式的空间数据上载Oracle Spatial数据库的方法,探讨各类GIS软件与Oracle Spatial进行空间数据交换的基本过程。 相似文献
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由中国地质大学研制开发的地理信息系统 MAPGIS6月12日在京推出5.0版,这是具有国际先进水平的、名列国家科委 GIS 软件平台前茅的国产地理信息系统(GIS)。MAPGIS 具有世界一流的数字地图制图功能,可实现几千幅地图的无缝拼接,地图与专业数据的联动双向查询、通用的空间分析,并具有二次开发工具。MAPGIS 5.0版与旧版相比,增加了灰度和彩色矢量化、编辑矢量化、库编辑一体化、多媒体数据库、属性数据表格输出等多项功能。目前,已有768套的 MAPGIS 相似文献
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在GIS行业,大量数据需要频繁地带到野外或其它数据采集现场进行更新,即离线编辑。结合MAPGIS7.0版本管理,提出了一种地理数据库版本驱动的离线编辑实现方法,详细阐述了其实现策略,并给出了实现的关键算法和注意要点。该方法已经被MAPGIS7.0平台采纳,实现了地理数据库的离线编辑功能,能够满足GIS远程或野外作业对离线编辑的实际需求,证明了该机制的正确性和可行性。 相似文献
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MAPGIS二次开发中图数松散耦合机制的实现方案 总被引:1,自引:0,他引:1
图形与数据通信的问题是GIS软件开发中需要处理的一个重要问题,决定软件运行的效率。本文在分析MAPGIS数据管理的基础上,提出MAPGIS二次开发中图数耦合的多种方式,并结合Visual C 编程实际介绍GIS软件开发中图数松散耦合方式的具体实现方法。 相似文献
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针对利用文件存储的GIS系统不能自动实现查询这一问题,结合SQL-99标准和GIS软件MAPGIS定义的语法规则,运用编译原理中的词法分析、语法分析等理论,实现了将用户输入的普通查询表达式解释为一个标准的SQL语句,并输出查询结果。该SQL解析器已经成功地运用在MAPGIS文件管理的属性检索模块中。 相似文献
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为了避免制图人员对GIS图形数据矢量化的重复劳动,在MAPGIS和SECTION中,通过对图件属性的巧妙运用,使空间数据和属性数据统一存储和管理来提高工作质量和效率.结合具体实例,阐述了运用图元属性来编辑处理图形数据.实践结果表明,对属性进行灵活使用,提高了工作效率和工作质量,为室内外地质人员提供便利和参考. 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值. 相似文献
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Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献