摘要:
随着国家“新基建”战略对于建设数字孪生城市建设的指引，我国城市轨道交通工程作为城市公共基础设施的重要组成部分进入了新的发展时期，通过构建数字孪生体系将会加快推动城市轨道交通工程全生命周期智能化进程。本文主要研究了城市轨道交通数字孪生标准体系构建的重点方向：首先阐述了城市轨道交通数字孪生标准体系构建的目的与意义以及当前城市轨道交通数字孪生标准化现状，并就标准体系构建的重点原则进行了分析；其次结合目前制造业的数字孪生模型架构和技术体系，建立了城市轨道交通领域的数字孪生标准体系架构；最后结合国内目前城市轨道交通领域技术体系标准制定的现状，详细分析了物理实体、虚拟实体、平台与服务、连接与集成等技术标准的构建基础与思路，以期促进数字孪生技术在我国城市轨道交通领域的全面推广应用。
摘要:
CIM数字底座建设中，主体框架是BIM+GIS，辅助IoT采集视频、传感器等数据来构建整个CIM数字底座。目前，多源异构模型的集成与兼容仍存在诸多技术难点，主要体现在模型数据融合难、模型加载效率低及渲染性能差等问题。实际项目建设过程中，三维数字底座模型部分多以三维手工建模、倾斜摄影为主，距离全场景BIM的目标尚有差距。本文从数据融合与渲染性能两大核心问题出发，针对数据融合需求，建立数据融合机制，研究CIM模型数据标准化格式（.cim），同时针对渲染调度需求，研究BIM模型轻量化技术，在支撑一套模型多引擎加载的前提下，提高模型渲染效率。
摘要:
建筑产业互联网是智能建造与建筑工业化转型的主要任务之一，为建筑业高质量发展带来了新的支撑，其全要素、全过程、全产业链连通的特征与多学科、多系统交叉的复杂结构对构建统一的体系架构提出了更高的要求。基于已有研究梳理了建筑产业互联网概念，总结了各类工业互联网参考架构的优点，构建了以建造技术和信息技术为支撑，实施、能力、平台三维度结合，新型服务为导向的建筑产业互联网体系架构，用于指导技术创新，推动企业探索，为建筑产业互联网的发展建设提供理论支撑。
摘要:
针对公路工程领域知识繁多而应用效率低的问题，提出面向公路规范类文本的多粒度知识提取与知识应用方法。在词语粒度上构建了公路工程领域词库；在语段粒度上提出TEARS定义，将复杂语段转换为结构化的三元组结构；在子句粒度上总结了四种主要句法，并各自设计了语义信息的抽取方法。以967本公路规范类文本为数据源，从中提取知识并构建了公路工程领域知识图谱，通过与深度学习方法比较验证了正确性，开发公路工程安全信息检索与应用系统。结果表明：该方法实现了非结构化公路规范类文本的知识提取，构建的领域知识图谱质量较高，满足工程应用需求。
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