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Digital twin topology modelling method of new-type distribution network based on CIM specifications and spectral clustering
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作者 Zhimin He Hai Yu +3 位作者 Lin Peng Aihua Zhou He Wang Jin Xu 《Global Energy Interconnection》 2025年第6期947-958,共12页
Regard to the real-time dynamic digital twin modelling problem of a new-type distribution network that includes distributed resources such as distributed photovoltaic,energy storage,charging pile,and electric vehicle,... Regard to the real-time dynamic digital twin modelling problem of a new-type distribution network that includes distributed resources such as distributed photovoltaic,energy storage,charging pile,and electric vehicle,a new-type distribution network digital twin topology modeling method based on Common Information Model(CIM)specifications and spectral clustering is proposed.Firstly,according to the specifications of the CIM standard,the digital twin topology models of distributed resources are extended and established.Secondly,based on the digital twin topology models of distributed resources,a digital twin aggregation modelling method for new-type distribution network is proposed based on spectral clustering.Furthermore,an online linked update strategy for the digital twin model of new-type distribution network that integrates real-time topology states is proposed.Finally,a case study is conducted on a distribution network in a certain demonstration area in China,and the results verify the practicability and effectiveness of the method proposed in this paper.This lays the foundation for the application of electrical network twin analysis,such as power flow calculation,optimal power flow,economic dispatch,and safety check,in a new-type distribution network that includes diversified distributed resources. 展开更多
关键词 Digital twin New-type distribution network cim specification Spectral clustering Topology model
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A New Inversion-free Iterative Method for Solving the Nonlinear Matrix Equation and Its Application in Optimal Control
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作者 GAO Xiangyu XIE Weiwei ZHANG Lina 《应用数学》 北大核心 2026年第1期143-150,共8页
In this paper,we consider the maximal positive definite solution of the nonlinear matrix equation.By using the idea of Algorithm 2.1 in ZHANG(2013),a new inversion-free method with a stepsize parameter is proposed to ... In this paper,we consider the maximal positive definite solution of the nonlinear matrix equation.By using the idea of Algorithm 2.1 in ZHANG(2013),a new inversion-free method with a stepsize parameter is proposed to obtain the maximal positive definite solution of nonlinear matrix equation X+A^(*)X|^(-α)A=Q with the case 0<α≤1.Based on this method,a new iterative algorithm is developed,and its convergence proof is given.Finally,two numerical examples are provided to show the effectiveness of the proposed method. 展开更多
关键词 Nonlinear matrix equation Maximal positive definite solution Inversion-free iterative method Optimal control
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Numerical Simulation of the Welding Deformation of Marine Thin Plates Based on a Temperature Gradient-thermal Strain Method
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作者 Lin Wang Yugang Miao +3 位作者 Zhenjian Zhuo Chunxiang Lin Benshun Zhang Duanfeng Han 《哈尔滨工程大学学报(英文版)》 2026年第1期122-135,共14页
Marine thin plates are susceptible to welding deformation owing to their low structural stiffness.Therefore,the efficient and accurate prediction of welding deformation is essential for improving welding quality.The t... Marine thin plates are susceptible to welding deformation owing to their low structural stiffness.Therefore,the efficient and accurate prediction of welding deformation is essential for improving welding quality.The traditional thermal elastic-plastic finite element method(TEP-FEM)can accurately predict welding deformation.However,its efficiency is low because of the complex nonlinear transient computation,making it difficult to meet the needs of rapid engineering evaluation.To address this challenge,this study proposes an efficient prediction method for welding deformation in marine thin plate butt welds.This method is based on the coupled temperature gradient-thermal strain method(TG-TSM)that integrates inherent strain theory with a shell element finite element model.The proposed method first extracts the distribution pattern and characteristic value of welding-induced inherent strain through TEP-FEM analysis.This strain is then converted into the equivalent thermal load applied to the shell element model for rapid computation.The proposed method-particularly,the gradual temperature gradient-thermal strain method(GTG-TSM)-achieved improved computational efficiency and consistent precision.Furthermore,the proposed method required much less computation time than the traditional TEP-FEM.Thus,this study lays the foundation for future prediction of welding deformation in more complex marine thin plates. 展开更多
关键词 Marine thin plate Welding deformation Numerical simulation Temperature gradient-thermal strain method Shell element
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基于Docker技术的CIM平台微服务部署研究与应用 被引量:1
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作者 孙立志 付海龙 《城市勘测》 2025年第1期138-141,共4页
城市信息模型(CIM)在城市规划、土地利用管理及智慧城市建设等领域的需求越来越迫切。文章通过对CIM平台建设在研发部署上的痛点、难点研究分析,提出使用Docker容器化技术部署微服务应用的策略,并将策略应用到CIM平台中,提高了CIM平台... 城市信息模型(CIM)在城市规划、土地利用管理及智慧城市建设等领域的需求越来越迫切。文章通过对CIM平台建设在研发部署上的痛点、难点研究分析,提出使用Docker容器化技术部署微服务应用的策略,并将策略应用到CIM平台中,提高了CIM平台建设部署效率,并因其支持跨平台,增强了平台建设的整体稳定性,为CIM平台建设提供重要的经验以及参考价值。 展开更多
关键词 DOCKER 微服务 城市信息模型 cim 容器化
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CIM+老旧小区改造协同设计平台搭建方法研究
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作者 陈义勇 尹妍 赵志刚 《智能城市》 2025年第4期105-109,共5页
老旧小区改造是城市更新的重要组成部分,也是推进我国城市高质量发展的重要抓手。在改造实践中,传统线性、接力式的设计模式往往导致专业协同不足,引发设计冲突频发、施工反复调整等问题。城市信息模型(CIM)平台汇聚了城市多源异构数据... 老旧小区改造是城市更新的重要组成部分,也是推进我国城市高质量发展的重要抓手。在改造实践中,传统线性、接力式的设计模式往往导致专业协同不足,引发设计冲突频发、施工反复调整等问题。城市信息模型(CIM)平台汇聚了城市多源异构数据,可以有效支撑老旧小区改造在概念设计、方案设计、初步设计、施工图设计等阶段的协同合作。文章采用专家访谈法、问卷调查法、专家打分法以及隶属度分析等方法,总结老旧小区改造协同设计问题和需求,筛选基于CIM的老旧小区改造协同设计的8项关键内容,提出基于CIM的老旧小区改造协同设计平台搭建方法。 展开更多
关键词 cim 老旧小区改造 协同设计平台 隶属度模型
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Study on Accounting Principle and Method of Activity-Based Costing of CIMS Enterprises in China 被引量:1
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作者 丁日佳 杜爱静 +1 位作者 强桂英 王立杰 《International Journal of Mining Science and Technology》 SCIE EI 2000年第2期26-29,共4页
关键词 of cimS Enterprises in China and method of Activity-Based Costing Study on Accounting Principle cimS ACTIVITY
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住区更新目标下衔接CIM管理的空间分类研究 被引量:1
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作者 王菲 崔小平 陈景衡 《住区》 2025年第2期95-102,共8页
本研究以渐进式住区更新为背景,以老旧住区的空间结构优化、基础设施完善为协同目标,聚焦更新中地块边界与更新项目事权边界间交叉、套叠的矛盾,探索适应CIM平台管理的住区空间分类方式。最终将住区空间分为7类,并将结论运用于CIM平台中... 本研究以渐进式住区更新为背景,以老旧住区的空间结构优化、基础设施完善为协同目标,聚焦更新中地块边界与更新项目事权边界间交叉、套叠的矛盾,探索适应CIM平台管理的住区空间分类方式。最终将住区空间分为7类,并将结论运用于CIM平台中,将一个真实社区更新管理场景进行可视化展示。研究结论将便于实现城市公共服务设施配置需求和社区公共空间供给的数字化管理,提升对既有住区空间的精细化运营管控水平。 展开更多
关键词 住区更新 空间结构 类型化 cim
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Analysis and discussion of different methods of artificial ice-high specimen preparation 被引量:1
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作者 ShuJuan Zhang Wei Ma +1 位作者 ZhiZhong Sun HaiMin Du 《Research in Cold and Arid Regions》 CSCD 2014年第5期440-446,共7页
Because ice-high foundation soil is widely distributed in permafrost regions,the correct preparation of ice-high specimens is of critical interest in engineering design for foundation stability.Past research has shown... Because ice-high foundation soil is widely distributed in permafrost regions,the correct preparation of ice-high specimens is of critical interest in engineering design for foundation stability.Past research has shown that the uniaxial compression strength of ice-high frozen soils changes as the ice or total water content increases; the differences of different methods of specimen preparation are analyzed here and the advantages and disadvantages of them are presented.It is confirmed that the role of crushed ice is significantly different from that of naturally frozen ice in frozen soils,and the size and amount of crushed ice will influence the strength and deformation mechanism of frozen soils.Therefore,it is strongly recommended that when a ice-high specimen is artificially prepared,the ice should be frozen through natural means and not be replaced with crushed ice. 展开更多
关键词 ice-high specimen artificial preparation method STRENGTH DEFORMATION
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Strategy and Method of CIMS Integration
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作者 史有群 巩敦卫 +1 位作者 谭超 马小平 《International Journal of Mining Science and Technology》 SCIE EI 1999年第2期163-166,共4页
Based on Nantun Coal Preparation Plant CIMS engineering, the system integrating strategy and methods of implementing CIMS are described. Combining the process of developing the syste, the information and function inte... Based on Nantun Coal Preparation Plant CIMS engineering, the system integrating strategy and methods of implementing CIMS are described. Combining the process of developing the syste, the information and function integration are discussed. 展开更多
关键词 cimS INTEGRATION STRATEGY INTEGRATION method
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Assessment of Calcimetric and Titrimetric Methods for Calcium Carbonate Estimation of Five Soil Types in Central Sudan 被引量:2
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作者 Jamal T. Elfaki Mohamed O. Gafei +1 位作者 Magboul M. Sulieman Mushtaha E. Ali 《Journal of Geoscience and Environment Protection》 2016年第1期120-127,共8页
Despite the CaCO<sub>3</sub> estimation using titration method was not reliable, but up to the present time, some soil laboratories in Sudan still used this method. The objective of this study was to compa... Despite the CaCO<sub>3</sub> estimation using titration method was not reliable, but up to the present time, some soil laboratories in Sudan still used this method. The objective of this study was to compare and assess the results of calcimetric and titrimetric methods of quantitative estimation for soil calcium carbonate of different soils in Sudan. 26 soil samples from five soil profiles were collected from different climatological and ecological regions in central Sudan. CaCO<sub>3</sub> equivalent was estimated using calcimeter and titration methods in order to find accurate, rapid and suitable method for soils of Sudan. The results revealed that there are no significant differences between calcimeter and titration methods for calcium carbonate estimation in all studied samples except in samples from Gedaref area. We concluded that when the Calcimeter method used for CaCO<sub>3</sub> estimation, the differences between one person and another in detecting titration end point would be avoided, rapid and accurate results would be obtained compared to titration method. Additionally, time would be saved;fewer amounts of chemicals would be used. From this study, we highly recommend using calcimeter method for CaCO<sub>3</sub> estimation for soils of Sudan. 展开更多
关键词 Ecological Regions Central Sudan Calcimeter Titration method
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上海市城市信息模型(CIM)赋能新型智慧城市建设的现状问题及对策建议 被引量:1
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作者 邵弯弯 姚严奇 +3 位作者 王浩然 顾锡新 邱鲁燕 陈弢 《中国建设信息化》 2025年第6期52-55,共4页
城市信息模型(CIM)赋能新型智慧城市建设是依托城市信息模型(CIM)平台,结合BIM、GIS、IOT等技术为城市全生命周期的建设和运营提供支撑。本文梳理了我国及上海市城市信息模型(CIM)赋能新型智慧城市建设的发展情况,总结上海市在组织机制... 城市信息模型(CIM)赋能新型智慧城市建设是依托城市信息模型(CIM)平台,结合BIM、GIS、IOT等技术为城市全生命周期的建设和运营提供支撑。本文梳理了我国及上海市城市信息模型(CIM)赋能新型智慧城市建设的发展情况,总结上海市在组织机制、政策措施、标准、技术、应用、投资、宣传交流及人才发展等层面的现状问题,并得出针对上海的相应对策建议。 展开更多
关键词 城市信息模型(cim) 城市信息模型(cim)平台 新型智慧城市 城市治理
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A novel specimen preparation method for TJ-1 lunar soil simulant in hollow cylinder apparatus 被引量:2
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作者 Mingjing Jiang Zhifu Shen +1 位作者 Liqing Li Jiaxing Su 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE 2012年第4期312-325,共14页
Conventional methods for hollow cylinder apparatus (HCA) specimen preparation are not applicable for T J-1 lunar soil simulant due to its wide particle size distribution. A novel method to prepare uniform T J-1 spec... Conventional methods for hollow cylinder apparatus (HCA) specimen preparation are not applicable for T J-1 lunar soil simulant due to its wide particle size distribution. A novel method to prepare uniform T J-1 specimen for HCA tests is put forward. The method is a combination of the multi-layering dry-rodding method and a new under-compaction criterion in the multi-layer with under-compaction method (UCM). In the novel method, the specimen is prepared with 5 layers by dry-rodding and the UCM is used to determine the height after each layer is compacted. The density uniformity of specimen is evaluated by the freezing method to find out the best under-compaction criterion. Two HCA specimens with the same target density are prepared by the novel method and examined in the tests of pure rotation of the principal stresses. Their conformable mechanical behaviors ascertain the effectiveness of the method to produce uniform and reproducible HCA specimens. Four groups of HCA tests are carried out to investigate the anisotropic and non-coaxial behaviors of TJ-I lunar soil simulant. The results indicate that the principal stress direction, the deviator stress ratio, the stress level and the coefficient of the intermediate principal stress significantly influence the strength and deformation properties of T J-1 lunar soil simulant. 展开更多
关键词 specimen preparation hollow cylinder apparatus (HCA) TJ-I lunar soil simulant multi-layering dry-roddingmethod multi-layer with under-compaction method (UCM)
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Knowledge-Based Efficient N-1 Analysis Calculation Method for Urban Distribution Networks with CIM File Data
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作者 Lingyu Liang Xiangyu Zhao +3 位作者 Wenqi Huang Liming Sun Ziyao Wang Yaosen Zhan 《Energy Engineering》 EI 2023年第12期2839-2856,共18页
The N-1 criterion is a critical factor for ensuring the reliable and resilient operation of electric power distribution networks.However,the increasing complexity of distribution networks and the associated growth in ... The N-1 criterion is a critical factor for ensuring the reliable and resilient operation of electric power distribution networks.However,the increasing complexity of distribution networks and the associated growth in data size have created a significant challenge for distribution network planners.To address this issue,we propose a fast N-1 verification procedure for urban distribution networks that combines CIM file data analysis with MILP-based mathematical modeling.Our proposed method leverages the principles of CIM file analysis for distribution network N-1 analysis.We develop a mathematical model of distribution networks based on CIM data and transfer it into MILP.We also take into account the characteristics of medium voltage distribution networks after a line failure and select the feeder section at the exit of each substation with a high load rate to improve the efficiency of N-1 analysis.We validate our approach through a series of case studies and demonstrate its scalability and superiority over traditional N-1 analysis and heuristic optimization algorithms.By enabling online N-1 analysis,our approach significantly improves the work efficiency of distribution network planners.In summary,our proposed method provides a valuable tool for distribution network planners to enhance the accuracy and efficiency of their N-1 analyses.By leveraging the advantages of CIM file data analysis and MILP-based mathematical modeling,our approach contributes to the development of more resilient and reliable electric power distribution networks. 展开更多
关键词 MILP cim fast analytical method N-1 distribution networks knowledge-based method
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智能化赋能堆石混凝土坝施工建设:CIM4R 被引量:1
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作者 杨家琦 金峰 +1 位作者 周虎 赵凯丽 《水电与抽水蓄能》 2025年第1期44-53,共10页
堆石混凝土作为我国自主研发的新一代大体积混凝土筑坝技术,其智能化质量控制与自动化(无人或少人)施工技术的研发,是推动其高质量快速建设乃至发展为下一代筑坝技术的必然条件。基于此,引入物联网、大数据、人工智能、云计算等新一代... 堆石混凝土作为我国自主研发的新一代大体积混凝土筑坝技术,其智能化质量控制与自动化(无人或少人)施工技术的研发,是推动其高质量快速建设乃至发展为下一代筑坝技术的必然条件。基于此,引入物联网、大数据、人工智能、云计算等新一代信息技术,研发了面向参建各方的堆石混凝土智能信息化施工技术与系统(Construction Information Modeling for RFC,CIM4R),重点解决堆石混凝土坝堆石入仓、高自密实性能混凝土浇筑、温控防裂以及层面处理等四条施工主线的实时监控、快速评价、报警预警和反馈控制等问题,以期实现相关工程的“提质-降本-增效”,为堆石混凝土坝智能建造技术的发展打下基础,推动我国下一代筑坝技术与新质生产力的发展。 展开更多
关键词 堆石混凝土 智能化 质量控制 新一代信息技术 cim4R
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Examining the influence of the loading path on the cracking characteristics of a pre-fractured rock specimen with discrete element method simulation 被引量:1
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作者 Kang DUAN Ri-hua JIANG +2 位作者 Xue-jian LI Lu-chao WANG Ze-ying YANG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2023年第4期332-349,共18页
Damage in a rock mass is heavily dependent on the existence and growth of joints,which are also influenced by the complex stress states induced by human activities(e.g.,tunneling and excavation).A proper representatio... Damage in a rock mass is heavily dependent on the existence and growth of joints,which are also influenced by the complex stress states induced by human activities(e.g.,tunneling and excavation).A proper representation of the loading path is essential for understanding the mechanical behaviors of rock masses.Based on the discrete element method(DEM),the influence of the loading path on the cracking process of a rock specimen containing an open flaw is examined.The effectiveness of the model is confirmed by comparing the simulation results under a uniaxial compression test to existing research findings,where wing crack initiates first and secondary cracks contribute to the failure of the specimen.Simulation results confirm that the cracking process is dependent upon both the confining pressure and the loading path.Under the axial loading test,a higher confining pressure suppresses the development of tensile wing cracks and forces the formation of secondary cracks in the form of shear bands perpendicular to the flaw.Increase of confining pressure also decreases the influence of the loading path on the cracking process.Reduction of confining pressure during an unloading test amplifies the concentration of tensile stress and ultimately promotes the appearance of a tensile splitting fracture at meso-scale.Confining pressure at the failure stage is well predicted by the Hoek-Brown failure criterion under quasi-static conditions. 展开更多
关键词 Cracking process Loading path Fractured rock mass Discrete element method(DEM) Local stress concentration
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CIMS冷端智能运维平台在25 MW发电机组上的应用
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作者 张勇 张强 +3 位作者 王建军 孙孝升 刘柏寒 苏季楠 《冶金设备管理与维修》 2025年第3期42-43,共2页
以鞍钢股份有限公司能环管理中心6#CDQ发电机组为例,探讨了CIMS冷端智能运维平台在25MW发电机组上的应用。通过对冷端系统的凝汽器和真空系统进行智能化改造和优化,凝汽器换热效率提升20%以上,真空度降低了13kPa,发电汽耗率下降了16%,... 以鞍钢股份有限公司能环管理中心6#CDQ发电机组为例,探讨了CIMS冷端智能运维平台在25MW发电机组上的应用。通过对冷端系统的凝汽器和真空系统进行智能化改造和优化,凝汽器换热效率提升20%以上,真空度降低了13kPa,发电汽耗率下降了16%,显著提升了机组的运行效率和经济性,为企业节能减排提供了新的解决方案。 展开更多
关键词 cimS 25MW发电机组 冷端优化 智能化运维
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基于BIM+CIM数据集成的建筑能耗管理应用 被引量:3
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作者 蒲靖 刘婉莹 +2 位作者 祁熙鹏 党涛 赵俊杰 《土木建筑工程信息技术》 2025年第1期43-49,共7页
随着城市化进程的加速和能源消耗的不断增长,建筑能耗管理已成为当前面临的重要问题。本文首先介绍了BIM与CIM的概念和特点,说明了BIM与CIM技术是形成数字城市空间技术的重要技术支撑,将成为未来城市信息化建设的主要力量;其次阐述了数... 随着城市化进程的加速和能源消耗的不断增长,建筑能耗管理已成为当前面临的重要问题。本文首先介绍了BIM与CIM的概念和特点,说明了BIM与CIM技术是形成数字城市空间技术的重要技术支撑,将成为未来城市信息化建设的主要力量;其次阐述了数据集成的原理和方法,详细介绍了城市区域能耗管理的实现过程,提出了一种基于BIM+CIM数据集成的建筑能耗管理方法,并在照明、空调、消防及动力等电力能耗特征规律分析方面进行了实践应用;最后验证了该方法有效结合BIM与CIM技术的数据集成,实现了城市区域建筑能耗的精细化管理和优化,提高了城市规划、建设和管理的效率与质量,推动了城市数字化转型升级。 展开更多
关键词 BIM技术 cim技术 数据集成 城市建筑 能耗管理
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基于CIM的城市轨道交通供电系统交直流供电计算
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作者 赵佳微 邹大云 +1 位作者 陈根军 解凯 《电气化铁道》 2025年第5期67-72,共6页
针对城市轨道交通电力调度系统普遍缺乏潮流分析应用的现状,将公共信息模型(CIM)应用于城市轨道交通供电领域,提出一种基于CIM的城市轨道交通供电系统交直流供电计算方法。遵循CIM拓展原则,对城市轨道交通供电系统模型进行CIM拓展,在此... 针对城市轨道交通电力调度系统普遍缺乏潮流分析应用的现状,将公共信息模型(CIM)应用于城市轨道交通供电领域,提出一种基于CIM的城市轨道交通供电系统交直流供电计算方法。遵循CIM拓展原则,对城市轨道交通供电系统模型进行CIM拓展,在此基础上提出一种考虑牵引变电所多运行状态的直流牵引供电计算方法;通过建立城市轨道交通供电系统交直流耦合接口模型,采用交直流交替迭代算法求解得到城市轨道交通供电系统的潮流分布;以某地铁线路供电系统作为算例进行验证。结果表明,基于CIM的城市轨道交通供电系统交直流供电计算方法正确可行,具有良好的工程推广应用前景。 展开更多
关键词 城市轨道交通供电系统 cim 交直流耦合 供电计算 潮流分布
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基于国产化GIS的深圳市CIM地下空间平台研究及探索 被引量:1
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作者 周丹 张会 《智能建筑与智慧城市》 2025年第1期16-18,共3页
文章围绕城市建设、运行和应急管理中的地下空间资源底数不清、隐蔽性强、可知不可见等难点和痛点,开展了地下空间多源异构数据管理、复杂数据空间表达等关键技术的研究,用于支撑信创环境下地下空间复杂场景的应用。在应用探索中,采用... 文章围绕城市建设、运行和应急管理中的地下空间资源底数不清、隐蔽性强、可知不可见等难点和痛点,开展了地下空间多源异构数据管理、复杂数据空间表达等关键技术的研究,用于支撑信创环境下地下空间复杂场景的应用。在应用探索中,采用了具有跨平台GIS内核的国产化Map GIS平台软件,构建了覆盖多端、安全可信的CIM地下空间平台框架,推进了深圳市地下“透明化”管理,提升了地下空间风险防控能力,为超大型城市的地下空间资产管理、应急管理、公共安全等方面提供应用案例参考。 展开更多
关键词 地下空间平台 cim GIS 国产化
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城市信息模型(CIM)平台在我国城市更新中的应用研究 被引量:2
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作者 韩青 姚博文 +1 位作者 杨柳忠 杨瀚霆 《中国建设信息化》 2025年第20期75-79,共5页
当前我国城镇地区待改造老旧小区超16万个,CIM平台作为数字化转型核心基础设施,在精准评估、协同设计等方面展现关键价值。本文通过梳理国内相关研究,分析CIM平台在城市更新中的应用现状、优势及存在的问题。研究发现,CIM平台在现状评... 当前我国城镇地区待改造老旧小区超16万个,CIM平台作为数字化转型核心基础设施,在精准评估、协同设计等方面展现关键价值。本文通过梳理国内相关研究,分析CIM平台在城市更新中的应用现状、优势及存在的问题。研究发现,CIM平台在现状评估、协同设计、施工管理和智慧化运营等方面具有显著优势,但CIM平台应用存在技术融合浅层化、历史空间数据治理不足等问题。未来需通过“技术融合+标准建设+公众参与+市场运作”四维路径提升城市更新的科学性和高效性,促进城市更新的高质量发展。 展开更多
关键词 城市信息模型(cim)平台 城市更新 应用现状与问题 发展展望
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