Knowledge graph technology play a more and more important role in various fields of industry and academia.This paper firstly introduces the general framework of the knowledge graph construction,which includes three st...Knowledge graph technology play a more and more important role in various fields of industry and academia.This paper firstly introduces the general framework of the knowledge graph construction,which includes three stages:information extraction,knowledge fusion and knowledge processing.In order to improve the efficiency of quality and safety supervision of transportation engineering construction,this paper constructs a knowledge graph by acquiring multi-sources heterogeneous data from supervision of transportation engineering quality and safety.It employs a bottom-up construction strategy and some natural language processing methods to solve the problems of the knowledge extraction for transportation engineering construction.We use the entity relation extraction method to extract the entity triples from the multi-sources heterogeneous data,and then employ knowledge inference to complete the edges in the constructed knowledge graph,finally perform quality evaluation to add the valid triples to the knowledge graph for updating.Subgraph matching technology is also exploited to retrieve the constructed knowledge graph for efficiently acquiring the useful knowledge about the quality and safety of transportation engineering projects.The results show that the constructed knowledge graph provides a practical and valuable tool for the quality and safety supervision of transportation engineering construction.展开更多
以“采煤机、刮板输送机、液压支架”工作面三机,“转载机、破碎机、带式输送机”顺槽三机以及供电系统、供液系统、控制系统和通信系统为配套的大型采煤设施装备是煤炭工业平稳高效发展的重要支柱。本项目以满足特厚煤层超大采高综放...以“采煤机、刮板输送机、液压支架”工作面三机,“转载机、破碎机、带式输送机”顺槽三机以及供电系统、供液系统、控制系统和通信系统为配套的大型采煤设施装备是煤炭工业平稳高效发展的重要支柱。本项目以满足特厚煤层超大采高综放开采装备配套需求为目标,以高可靠性、长寿命、自动化、智能化技术为攻关重点,开发包含装机功率2×2000 kW前部输送机、装机功率3×1600 k W后部输送机及配套转载机、破碎机的超重型、超大运量,以及操作方式的自动化、智能化、形成了高可靠性综放工作面成套输送设备,并通过运输过程中发现的问题对转载机进行了相应的升级改造,确保了煤块流畅地卸载于顺槽转载机上,尽量减少回煤;创新性地开发了带式自移支撑装置,实现了装置的自行前移、支撑高度调整,有效减少了带式输送机中间架拆架次数。运输系统设备的升级改造满足产量15 Mt/a以上特厚煤层综放工作面开采需要。展开更多
This paper presents a multi-objective optimization model to decide effective and beneficial portfolio for implementing traffic safety improvements under budgetary constraints.Different from the conventional multi-obje...This paper presents a multi-objective optimization model to decide effective and beneficial portfolio for implementing traffic safety improvements under budgetary constraints.Different from the conventional multi-objective approaches,the proposed model segregates decision criteria into different importance levels and designs a successive optimization approach to obtain the final solution(s).Such modeling features offer the advantages to:1)prevent the arbitrariness for transportation agencies to determine weights for decision criteria;2)remedy the deficiency of over-weighting less important criteria in the traditional multi-objective optimization approach;and 3)minimize the number of potential solutions for final decision by transportation agencies with enhanced screening of the sub-optimal solutions.Case study results reveal that the proposed model is efficient not only for deciding the most suitable traffic safety countermeasure for a specific site,but also for determining the plans for implementing multiple countermeasures among multiple sites given the budget constraint.Comparative study results have also indicated that the proposed model outperforms the traditional criteria in objectively selecting traffic safety improvements in a multi-criteria decision-making process.The clarity of model inputs and the interpretation of results with respect to different selection criteria offer its best potential to be used as an effective decision-support tool for transportation authorities to assess and refine their safety improvement investments.展开更多
基金This work was supported by Scientific Research Project of Department of Transportation of Hunan Province under Grant No.201814.
文摘Knowledge graph technology play a more and more important role in various fields of industry and academia.This paper firstly introduces the general framework of the knowledge graph construction,which includes three stages:information extraction,knowledge fusion and knowledge processing.In order to improve the efficiency of quality and safety supervision of transportation engineering construction,this paper constructs a knowledge graph by acquiring multi-sources heterogeneous data from supervision of transportation engineering quality and safety.It employs a bottom-up construction strategy and some natural language processing methods to solve the problems of the knowledge extraction for transportation engineering construction.We use the entity relation extraction method to extract the entity triples from the multi-sources heterogeneous data,and then employ knowledge inference to complete the edges in the constructed knowledge graph,finally perform quality evaluation to add the valid triples to the knowledge graph for updating.Subgraph matching technology is also exploited to retrieve the constructed knowledge graph for efficiently acquiring the useful knowledge about the quality and safety of transportation engineering projects.The results show that the constructed knowledge graph provides a practical and valuable tool for the quality and safety supervision of transportation engineering construction.
文摘以“采煤机、刮板输送机、液压支架”工作面三机,“转载机、破碎机、带式输送机”顺槽三机以及供电系统、供液系统、控制系统和通信系统为配套的大型采煤设施装备是煤炭工业平稳高效发展的重要支柱。本项目以满足特厚煤层超大采高综放开采装备配套需求为目标,以高可靠性、长寿命、自动化、智能化技术为攻关重点,开发包含装机功率2×2000 kW前部输送机、装机功率3×1600 k W后部输送机及配套转载机、破碎机的超重型、超大运量,以及操作方式的自动化、智能化、形成了高可靠性综放工作面成套输送设备,并通过运输过程中发现的问题对转载机进行了相应的升级改造,确保了煤块流畅地卸载于顺槽转载机上,尽量减少回煤;创新性地开发了带式自移支撑装置,实现了装置的自行前移、支撑高度调整,有效减少了带式输送机中间架拆架次数。运输系统设备的升级改造满足产量15 Mt/a以上特厚煤层综放工作面开采需要。
文摘This paper presents a multi-objective optimization model to decide effective and beneficial portfolio for implementing traffic safety improvements under budgetary constraints.Different from the conventional multi-objective approaches,the proposed model segregates decision criteria into different importance levels and designs a successive optimization approach to obtain the final solution(s).Such modeling features offer the advantages to:1)prevent the arbitrariness for transportation agencies to determine weights for decision criteria;2)remedy the deficiency of over-weighting less important criteria in the traditional multi-objective optimization approach;and 3)minimize the number of potential solutions for final decision by transportation agencies with enhanced screening of the sub-optimal solutions.Case study results reveal that the proposed model is efficient not only for deciding the most suitable traffic safety countermeasure for a specific site,but also for determining the plans for implementing multiple countermeasures among multiple sites given the budget constraint.Comparative study results have also indicated that the proposed model outperforms the traditional criteria in objectively selecting traffic safety improvements in a multi-criteria decision-making process.The clarity of model inputs and the interpretation of results with respect to different selection criteria offer its best potential to be used as an effective decision-support tool for transportation authorities to assess and refine their safety improvement investments.
