CAD在地质填图中的应用

通过对填图技术的研究,总结了地质填图技术的优势,同时也分析了地质填图技术的缺陷。并介绍了基于CAD的地质填图的主要技术、工作流程、关键步骤以及应用意义。论述了地质填图的特点,说明了该技术未来的理论研究和应用发展趋势。     

数字区调新技术新方法—RS_OrthoMapper系统研制开发

为了适应当今数字区调工作的需要,开发一套3S技术有机结合简单实用的数字区调野外工作平台或软件系统,已成为燃眉之急。论文介绍了数字区调新技术新方法--RS_OrthoMapper系统研制与开发的基本需求、系统的总体结构与设计、系统实现等,并给出了系统中一些重要的逻辑视图。该系统在西藏昌务场和青海阿拉克湖等地区数字区调填图中示范应用,获得良好效果。     

用计算机推理的方法求解数字填图问题

模拟人思考问题的过程．尝试用计算机推理的方法求解数字填图问题。     

数字区调新技术新方法——RS_Orth0Mapper系统研制开发

为了适应当今数字区调工作的需要，开发一套3S技术有机结合简单实用的数字区调野外工作平台或软件系统，已成为燃眉之急。论文介绍了数字区调新技术新方法——RS_OrthoMapper系统研制与开发的基本需求、系统的总体结构与设计、系统实现等，并给出了系统中一些重要的逻辑视图。该系统在西藏昌务场和青海阿拉克湖等地区数字区调填图中示范应用，获得良好效果。     

浅谈地质测绘技术

地质测绘是一个非常复杂的地质填图工作,在现代国家的环境和资源领域的占有举足轻重的地位。近年来,科学和技术的发展和迅速进步的经济,地质填图工作的开展和发展面临着越来越大的压力。为了提高地质填图工作的质量和竞争力,就必须提高现有技术的基础上,本文重点介绍地质填图技术,在此基础上提出了一些改进措施。     

VR-GIS技术在高等级公路建设中的应用

以连霍国道主干线(GZ45)牛背(宝鸡)至天水段高速公路建设为例,主要从数据预处理、三维虚拟现实数字模型建立、工程填挖方计算与分析、三维巡航模拟飞行等几个方面,详细探讨了利用数字高程模型(DEM)、数字正射影像图(DOM)、数字线划图(DLG)等基础地理空间数据及VR-GIS技术,为高速公路方案比选、选线及构筑物设计、环境保护、工程可行性分析提供可靠决策依据的技术方法。     

矿井地质记录中手写数字自动识别方法

针对目前矿井地质记录中采用人工判读方式识别手写数字效率较低的问题,提出了一种手写数字自动识别方法,详细介绍了颜色过滤及数字区域定位、数字分割、样本训练、数字识别等步骤。该方法利用计算机图像处理技术实现了对特定区域数字的自动定位和识别,提高了工作效率。     

浅析特定领域中的数字媒体技术的运用

数字媒体技术是以信息科学和数字技术为主导,以大众传播理论为依据,融合文化与艺术,将信息传播技术应用到文化、艺术、娱乐、商业、教育和管理等领域。数字媒体技术为数字媒体产业发展提供者坚实的技术支持,而数字媒体产业迅猛发展又进一步促进7数字媒体技术的发展与应用。文章简单阐述了数字媒体以及数字媒体技术的概念,井详细介绍了数字媒体技术在电影领域和电子商务领域中的运用。     

VR-GIS技术在高等级公路建设中的应用

以连霍国道主干线(GZ45)牛背(宝鸡)至天水段高速公路建设为例，主要从数据预处理、三维虚拟现实数字模型建立、工程填挖方计算与分析、三雏巡航模拟飞行等几个方面，详细探讨了利用数字高程模型(DEM)、数字正射影像图(DOM)、数字线划图(DLG)等基础地理空间数据及VR—GIS技术，为高速公路方案比选、选线及构筑物设计、环境保护、工程可行性分析提供可靠决策依据的技术方法。     

遥感技术应用于石油地质填图

本文针对石油地质工作在新区勘探中,首要解决的１∶５００００及１∶１０００００大比例尺石油地质填图问题,依据近几年填图工作经验,从遥感技术方面结合野外路线地质调查对比分析,论述了成图方法和取得的效果。     

Digital geological mapping with tablet PC and PDA: A comparison

Both the hardware and software available for digital geological mapping (DGM) have advanced considerably in recent years. Mobile computers have become cheaper, lighter, faster and more power efficient. Global Positioning Systems (GPS) have become cheaper, smaller and more accurate, and software specifically designed for geological mapping has become available. These advances have now reached a stage where it is effective to replace traditional paper-based mapping techniques with those employing DGM methodologies. This paper attempts to assess and evaluate two currently available DGM systems for geological outcrop mapping: one based on a Personal Digital Assistant (PDA) running ESRI “ArcPad”, and the second based on a Tablet PC running “Map IT” software. Evaluation was based on field assessment during mapping of a well-exposed coastal section of deformed Carboniferous and Permian rocks at N. Tynemouth in NE England. Prior to the field assessment, several key criteria were identified as essential attributes of an effective DGM system. These criteria were used as the basis for the assessment and evaluation process. Our findings suggest that the main concerns presented by sceptics opposed to DGM have largely been resolved.In general, DGM systems using a Tablet PC were found to be most suitable for a wide range of geological data collection tasks, including detailed outcrop mapping. In contrast, systems based on a PDA, due to small screen and limited processing power, were best suited for more basic mapping and simple data collection tasks. In addition, PDA-based systems can be particularly advantageous for mapping projects in remote regions, in situations where there is a limited power supply or where total weight of equipment is an important consideration.     

基于掌上电脑的地下管线普查与测量系统

研究目的是为建立数字化地下管线信息库提供野外测量数字成图一体化工作模式的软件平台,满足数字城市建设的需要。主要方法是以掌上电脑(PDA)为硬件平台,以eMbeddedVisualC++为软件开发工具开发管线普查与测量数据采集系统的用户规范、数据模型及功能模块,给出了系统实现过程中一些关键问题的解决方案。系统已通过验收并应用于生产,结果表明该系统大幅度提高了作业速度和精度,在生产实践中证明了其快捷性与实用性。从而得出基于WindowsCE嵌入式操作系统PDA开发管线普查与测量系统软件,实现测量成图一体化的前端数据采集具有现实性和可行性这一重要结论。     

数字城市中快速自动生成三维景观的研究

数字地球、数字中国、数字城市是当前数字信息化领域的一个研究热点。其中的一个关键问题是利用遥感图像形成三维景观,其处理方法是首先将遥感图像矢量化,然后以矢量化数据为基础完成三维立体化工作以形成三维景观。本文阐述了以矢量化数据为基础完成三维立体化工作以形成三维景观的技术方法,包括获取矢量化数据、快速自动生成三维景观等处理步骤。应用效果良好。     

地质断层三维可视化模型的构建方法与实现技术

全面而系统地研究了地质断层三维可视化构模的原理、方法及实施过程.针对地质断层三维构模的特点与要求,设计了一种基于边界表示、面向地质实体并兼顾拓扑关系的三维矢量数据模型,以有效地组织和描述包含断层的复杂地质体几何结构模型.提出了断层与地层的统一构模技术,给出了在其实现过程中所遇到的关键问题(如断层面的推演拟合、地层层面重构、断层与地层的交切处理与局部重构)的解决方案.基于断层的属性、断层数据所反映的断层面的特征和质量,应用3种方法来拟合断层面.在地层层面重构时,考虑到了断层面在地层面网格加密、插值时的约束和屏蔽作用,实现了具有多值面的逆断层网格生成技术.应用三角网切割算法TRICUT来实现断层与地层的交切处理.通过北京奥运公园场区基岩地质模型中的断层构模实例验证了这些技术方法的有效性.     

Digital twin-based assembly data management and process traceability for complex products

Complex products such as satellites, missiles, and aircraft typically have demanding requirements for dynamic data management and process traceability. The assembly process for these complex products involves high complexity, strong dynamics, many uncertainties, and frequent rework and repair, especially in the model development stage. Achieving assembly data management and process traceability for complex products has always been a challenge. A recently proposed solution involves one-to-one mapping of the corresponding physical entity, also known as the digital twin method. This paper proposes a digital twin-based assembly data management and process traceability approach for complex products. First, the dynamic evolutionary process of complex product assembly data was analyzed from three dimensions: granularity, period and version. Then, a framework of digital twin-based assembly data management and process traceability for complex products was constructed. Some core techniques are: 1) workflow-based product assembly data organization and version management; 2) synchronous modeling of the product assembly process based on digital twin; and 3) hierarchical management and traceability of product assembly data based on digital twin. On this basis, an algorithm flowchart for generating a product assembly data package was created, which includes product assembly data management, assembly process traceability, and generation of a product assembly data package. Furthermore, the Digital Twin-based Assembly Process Management and Control System (DT-APMCS) was designed to verify the efficiency of the proposed approach. Some aerospace-related assembly enterprises are currently using DT-APMCS and achieving satisfactory results. Finally, a summary of our work is given, and the future research work is also discussed.     

基于ERDAS的三维地形景观图制作——以甘肃省敦煌市鸣沙山地形为例

简单介绍了DRG数据和DEM数据的获取方法,对如何利用已有的DRG数据和DEM数据制作三维地形景观图的方法、步骤进行详细的介绍,阐述了三维地形景观图是一种由基础测绘数字产品相互组合而形成的专题地图产品,是一种新型的复合测绘产品。并对三维地形景观图的应用前景作了展望。     

基于MAPGIS-IMS实现武汉市城市规划系统

Web GIS和工作流技术是构建数字城市的主要技术.随着信息化浪潮的不断深入,利用Internet构建各种web服务成为热门话题.文中首先分析当前"数字武汉"实际需求;其次,认真研究了网络系统的体系结构特点及Web相关技术;然后,给出了基于国产Web GIS软件--MAPGIS-IMS和国外优秀的工作流平台--Domino/Notes的集成设计方案;最后,利用这两个平台使用ASP技术实现了基于Browser/Server架构的"数字武汉"子系统--武汉市城市规划系统.实践证明基于MAPGIS-IMS与Domino/Notes无缝集成方案是构建数字城市的理想方案.     

虚拟现实建模技术在数字化发射场中的应用

建立数字化发射场是卫星发射信息化和应急保障的基础。本文结合某卫星发射场实时性和交互性视景仿真实现的特点，采用基于三维几何模型的建模及动态显示技术的虚拟场景创建方法，讨论了虚拟漫游系统中建模流程、方法，以及关键技术的实现，分析了通用的三维场景建模的技术路线和流程，给出了地物、天空和实体模型构建的实际解决方案、方法，讨论了基于MultiGen Creator的模型格式转换、纹理贴图、模型简化、LOD技术、DOF技术等建模关键技术。采用MultiGen Creator和Vega软件平台，开发出了一个桌面型的虚拟发射场仿真系统，实现了发射场的数字化和卫星发射的实时仿真。     

虚拟现实技术及其在数字流域中的应用

该文介绍了面向21世纪的数字化工程中的数字流域、虚拟现实等重要概念。研究了虚拟现实技术应用于数字流域研发的相关技术：提高图形系统效率的多种细节层次的视景表示、多层次数据管理与视景调度技术，优化界面的多维人机交互技术，流域模型构建以及3S数据在数字流域中的应用模型。讨论了数字流域采用虚拟现实技术在三维漫游，仿真结果叠加，抗洪减灾，开发旅游资源等方面的重要应用。     

Self-efficacy and anxiety of digital natives in face of compulsory computer-mediated tasks: A study about digital capabilities and limitations

Digital limitations (or, conversely, digital capabilities) are a new way to frame the digital divide discourse in three dimensions: access, cognition and behavior. Digital limitations address an individual's barriers to properly access the information and communication technologies (ICTs), as well as his/her cognitive disabilities and negative behaviors towards ICT use effectiveness. In a survey with 174 undergraduate students in a traditional state university in underdeveloped Northeastern Brazil who compulsorily use an institutional ICT-based academic system, we investigated the factorial structure and the relationship of two constructs that pertain to the cognitive dimension of digital limitations – computer self-efficacy and anxiety. Our findings address the negative correlation between the two constructs and the unanticipated proposition that both low and high levels of self-efficacy and anxiety do not signal per se the presence of cognitive digital limitations or capabilities.