首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   901篇
  免费   247篇
  国内免费   8篇
电工技术   17篇
综合类   43篇
化学工业   12篇
金属工艺   2篇
机械仪表   5篇
建筑科学   827篇
矿业工程   11篇
能源动力   17篇
轻工业   7篇
水利工程   38篇
石油天然气   3篇
无线电   13篇
一般工业技术   28篇
冶金工业   2篇
自动化技术   131篇
  2024年   11篇
  2023年   14篇
  2022年   52篇
  2021年   80篇
  2020年   108篇
  2019年   79篇
  2018年   63篇
  2017年   88篇
  2016年   103篇
  2015年   81篇
  2014年   175篇
  2013年   69篇
  2012年   110篇
  2011年   61篇
  2010年   31篇
  2009年   16篇
  2008年   3篇
  2007年   4篇
  2006年   3篇
  2003年   3篇
  1998年   1篇
  1994年   1篇
排序方式: 共有1156条查询结果,搜索用时 296 毫秒
1.
韩海坤  孙钢柱 《建筑经济》2020,41(1):104-109
构建工程咨询机构BIM技术应用能力评价的指标体系,提出改进的熵权TOPSIS评价模型,以4个典型的工程咨询单位为例,进行BIM技术运用能力评价。研究表明,BIM行业的整体水平已经有了明显的提升,但是区域间的发展还存在一定差距。  相似文献   
2.
医院建筑项目是非常复杂且具有挑战性的建设项目。传统的交付模式无法满足人们对医院建筑建设、运营方面的高要求,为此开展面向医院建筑项目的IPD模式应用研究。在对IPD模式发展现状整理的基础上,阐述医院建筑项目IPD模式的适用性。分析采用IPD模式的医院建筑项目特点,并以上海市某公立三甲专科医院项目为例,对IPD模式在国内的应用进行探索性研究。  相似文献   
3.
杨凡 《住宅产业》2020,(3):64-65
随着BIM技术的进步,建筑行业越来越重视BIM技术的应用,并在应用过程中取得一定的成效。本文从工程造价决策、设计、招投标、施工、竣工五个阶段阐述BIM技术在建筑工程造价中的应用对策。  相似文献   
4.
Building Information Models (BIM) are comprehensive digital representations of buildings, which provide a large set of information originating from the different disciplines involved in the design, construction and operation processes. Moreover, accessing the data needed for a specific downstream application scenario is a challenging task in large-scale BIM projects. Several researchers recently proposed using formal query languages for specifying the desired information in a concise, well-defined manner. One of the main limitations of the languages introduced so far, however, is the inadequate treatment of geometric information. This is a significant drawback, as buildings are inherently spatial objects and qualitative spatial relationships accordingly play an important role in the analysis and verification of building models. In addition, the filters needed in specific data exchange scenarios for selecting the information required can be built by spatial objects and their relations. The lack of spatial functionality in BIM query languages is filled by the Query Language for Building Information Models (QL4BIM) which provides metric, directional and topological operators for defining filter expressions with qualitative spatial semantics. This paper focuses on the topological operators provided by the language. In particular, it presents a new implementation method based on the boundary representation of the operands which outperforms the previously presented octree-based approaches. The paper discusses the developed algorithms in detail and presents extensive performance tests.  相似文献   
5.
During building emergencies, an effective and visible primary search plan enhances situation awareness and enables a more efficient rescue mission. The aim of the primary search during an emergency is the rapid screening of every space in the building to identify locations of victims and their conditions. Afterwards, first responders can plan for the rescue of those victims. To provide a timely draw up of interior patrol routes and assign rescue teams to conduct the primary search, this study formulates the problem as a multiple traveling salesman problem (M-TSP) where the comprehensive building interior network is given by the building information models (BIMs), while the total traveling costs (lengths) of every rescue team is minimized. To meet the requirement of real-time patrol routes optimization, we employed the branch-and-price algorithm for the enhancement of computation efficiency. In addition, a heuristic method was introduced to provide timely solutions for large-scale networks. A case study is conducted for a single-floor convention center. We utilized BIM to construct a network of nodes and arcs where the decision model requires as input, and the branch-and-price algorithm finds the optimal patrol. The resulting patrol routes can be visualized and serve as guide for rescue teams to conduct the primary search. The integrated approach proposed in this study is practical and can expedite search and rescue missions.  相似文献   
6.
The proliferation of Building Information Modeling (BIM) applications, in tandem with the extensive variation of building products, pose new demands on design and engineering firms to efficiently manage and reuse BIM content (i.e., data-rich parametric model objects and assembly details). Tasks such as classifying BIM objects, indexing them with meta-data (e.g., category), and searching digital libraries to load objects into models still plague practice with inefficient manual workflows. This research aims to improve the productivity of BIM content management and retrieval by developing an AI-backed BIM content recommender system. Using data from a case-study firm, this research extracted content from over 30,000 technical BIM views (e.g., plans, sections, details) in historical projects to build an unsupervised machine-learning prototype with association rule mining. This prototype explicated the strength of relationships among co-occurring BIM objects. Using this prototype as the backbone AI-engine in live BIM sessions, this research developed a context-aware recommender system that dynamically provides BIM users with a set of objects associable with their modeling context (e.g., type of view, existing objects in the model) and human–computer interactions (e.g., objects selected by the user). By mining association data from hundreds of historical projects, this development marks a departure from the existing prototypes that rely on explicit coding, recurring user input, or subjective ratings to recommend BIM content to users. The simulation and experimental implementation of this recommender system yielded high efficacy in predicting content needs and achieved significant savings in the time spent on conventional BIM workflows.  相似文献   
7.
建筑信息模型(BIM)图纸多人协同创作在大型建筑项目中很重要,而现有的基于Revit等建模软件或云服务的BIM图纸多人协同创作方法存在BIM图纸版本混乱、不易溯源以及数据安全风险等问题。针对这些问题,设计了一种基于区块链的BIM图纸多人协同创作系统。该系统采用链上链下协同的存储方式,使用区块链和数据库分别存储BIM图纸创作过程中每次创作后的BIM图纸信息以及完整BIM图纸,利用区块链去中心化、可追溯和防篡改的特性保证BIM图纸的版本清晰,并为以后的版权划分提供依据,而且提升了BIM图纸信息数据的安全性。实验结果表明,该系统在多用户并发情况下的平均出块时间为0.467 85 s,系统的最大处理速率为每秒1 568次交易,验证了该系统是可靠的,且可以满足实际应用场景的需求。  相似文献   
8.
城市道路基础设施三维模型的重构,在城市道路BIM应用与数字化领域具有重大意义;针对城市交通基础设施数字化重构的需求,对车载激光扫描与无人机倾斜摄影采集技术进行综合运用,提出一套从信息采集、空地点云配准、点云分割到三维重构的完整技术方法;首先使用车载激光扫描技术和无人机倾斜摄影技术对交通基础设施信息进行采集,并使用运动恢复结构算法(SfM,structure from motion)生成基础设施空地点云;其次使用迭代最近点法(ICP,iterative closest point)对空地点云进行精配准,然后利用基于PointNet网络的方法对融合点云进行语义分割;最后对分割出的交通基础设施对象进行三维重构;提出的空地融合的城市交通基础设施数字化技术能够高效地实现交通基础设施重构,为城市交通基础设施数字化提供基础、为后续交通专业领域的应用研究提供便利.  相似文献   
9.
传统水利工程通常存在管理模式复杂、施工信息繁多、数据收集困难、可视化程度低等问题,研究在复杂管理模式下的信息化的工程管理手段,可有效提高水利工程管理的效率和水平,实现工程精细化管理。以海南省重大水利工程智能建造系统为例,提出 GIS + BIM 的水利工程两层级(集团级和项目级)架构的工程数字化管理系统的管理模式,可通过 PC 端和移动端 App 操作,结合工程建设期内各建设、监理、施工、设计及其他参建单位的工程建设管理需求,实现工程进度、质量、投资、安全等全要素的智能化管控。实际工程应用表明:该模式在复杂管理组织模式下能较快适应现场实际需求,发挥作用,为管理模式复杂的大型水利工程项目群施工期的建设管理提供参考。  相似文献   
10.
刘凤友  权锋  徐汉坤 《水力发电》2020,46(4):101-104
风电项目管理粗放,建设工程中存在管理混乱、标准化欠缺、管理不闭环、交叉管理以及信息闭塞等现象,随着风电投资趋于理性,新建风电项目迫切需要提高管理水平,因此需要依赖数字化技术。鉴于此,基于BIM+GIS技术,构建可视化风电项目建设管理平台,将设计、质量、安全、合同、进度、资金、设备采购等管理工作信息化、可视化、标准化,既减轻了工作量,又提高了管理水平,实现了风电项目的精细化、高效化、智能化管理。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号