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一种新型的管线评估系统
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作者 TomIseley 李春燕 《非开挖技术》 2002年第4期40-42,共3页
本文介绍了一种新型的地下管线评估系统,它利用光学扫描技术对地层进行扫描,并简要介绍了该系统在美国、欧洲、芬兰等地的使用情况。
关键词 管线评估系统 非开挖 地下管线 修复 美国 欧洲 芬兰
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资金的最佳应用-管线的评估与修复
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作者 LanceM.Harman 朱文鉴 《非开挖技术》 2003年第4期124-127,共4页
关键词 管线评估 管线修复 管线检测 施工方法
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特大城市地下管线综合规划编制要点探讨 被引量:4
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作者 胡华望 杜遂 《给水排水》 CSCD 北大核心 2018年第11期99-102,共4页
目前国内城市空间层面上的管线综合规划编制处于起步阶段,相关技术标准尚未建立,针对地下管线建设面临的突出问题,探讨适用于宏观层面上的管线综合规划编制要点。结合武汉实际案例,构建"管线完善率、管线集约率"管线评估指标... 目前国内城市空间层面上的管线综合规划编制处于起步阶段,相关技术标准尚未建立,针对地下管线建设面临的突出问题,探讨适用于宏观层面上的管线综合规划编制要点。结合武汉实际案例,构建"管线完善率、管线集约率"管线评估指标,提出城市三级干管廊道概念、布局方案、管控要素,基于管线建设要求对道路下的浅层地下空间按-4m、-6m、-8m进行竖向分层探索。 展开更多
关键词 管线综合规划 管线定量评估 干管廊道 竖向管控
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浅谈汽车制造过程中管线评审工作的组织开展 被引量:1
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作者 黄薇 安丰明 《内燃机与配件》 2020年第8期193-195,共3页
本文主要基于目前汽车整车厂管线评审专项活动,系统梳理了管线评审活动的组织形式及注意事项,阐述了整车管路和整车线束布置方面的评审方法及要求,为生产现场、新产品开发等过程中的管线评审活动提供一定的参考和借鉴。
关键词 汽车生产制造 管线评审 管线风险评估
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电导率法测量湿饱和蒸汽干度装置及应用
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作者 郑国威 晏永飞 +1 位作者 吴宁 吴婷婷 《山东化工》 CAS 2021年第15期91-93,共3页
当前我国大部分油田已经完成蒸汽吞吐采收阶段,为了提高采收效率需要采用蒸汽驱的方法进行后续的采收。蒸汽干度是蒸汽驱法中关键参数,它决定着采油效率的高低。通过电导率法对注汽井口处的湿蒸汽干度进行在线监测,基于质量守恒定律建... 当前我国大部分油田已经完成蒸汽吞吐采收阶段,为了提高采收效率需要采用蒸汽驱的方法进行后续的采收。蒸汽干度是蒸汽驱法中关键参数,它决定着采油效率的高低。通过电导率法对注汽井口处的湿蒸汽干度进行在线监测,基于质量守恒定律建立电导率法蒸汽干度监测算法模型。对蒸汽干度检测装置硬件进行选择,并进行装置现场安装。通过现场应用的数据分析,验证了装置的使用效果并进行误差分析和管线评估。 展开更多
关键词 电导率法 蒸汽干度 误差分析 管线评估
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多模影像的脑深部电刺激术后效果评估管线的设计与实现
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作者 罗守华 倪杨阳 +1 位作者 郑慧芬 曹胜武 《生物医学工程学杂志》 EI CAS CSCD 北大核心 2019年第3期356-363,共8页
脑深部电刺激(DBS)手术是中、晚期帕金森病患者的重要治疗手段,电极在相应核团位置的精确度直接决定着手术的治疗效果。目前单一影像学手段无法得到具有电极、核团及其位置关系的图像,且由于丘脑底核体积小,边界不明显,无法对其直接进... 脑深部电刺激(DBS)手术是中、晚期帕金森病患者的重要治疗手段,电极在相应核团位置的精确度直接决定着手术的治疗效果。目前单一影像学手段无法得到具有电极、核团及其位置关系的图像,且由于丘脑底核体积小,边界不明显,无法对其直接进行分割。本文利用DBS手术特有的T1、T2及SWI加权方式的磁共振(MR)数据构建了完整的端到端DBS术后效果评估管线。首先将术前、术后患者图像配准,标准化至同一坐标空间;随后利用脑图谱与术前数据的非刚性配准得到个性化的患者图谱,从而得到术前的核团预测位置;之后再次利用术后图像中的电极路径及结合核团分割结果,得到电极和核团位置关系的三维图像,有助于DBS术后效果的评估,为术后程控提供有效的信息。经分析,本文算法可以实现患者DBS手术图像与脑图谱间的配准,算法与专家评估的丘脑底核重心物理坐标的误差为(1.590±1.063)mm。本文解决了DBS手术电极植入位置的术后评估问题。 展开更多
关键词 多模影像 脑深部电刺激手术 评估管线
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时域反射技术在给水管线检测评估中的应用
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作者 许若岚 《上海水务》 2009年第2期19-21,30,共4页
上海正处在大规模地下给水管线更新和修复的阶段。只有了解地下给水管线的实际状况后,才能决定如何更新和修复这些地下管线。本文在分析和总结国外参考文献的基础上介绍了时域反射技术在给水管线检测中的应用,例举了该技术在香港地区等... 上海正处在大规模地下给水管线更新和修复的阶段。只有了解地下给水管线的实际状况后,才能决定如何更新和修复这些地下管线。本文在分析和总结国外参考文献的基础上介绍了时域反射技术在给水管线检测中的应用,例举了该技术在香港地区等地的应用实例和检测结果分析。 展开更多
关键词 给水管线检测 时域反射 TDR技术 管线评估
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Development and Application of Oil-Spill Risk Assessment Model for Offshore Pipeline 被引量:2
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作者 LU Yan WANG Jia +2 位作者 WEI Wenpu YANG Yong AN Wei 《Journal of Ocean University of China》 SCIE CAS 2014年第3期415-420,共6页
To the potential oil-spill risk caused by offshore pipeline more attention has been paid after the Dalian oil spill incident from oil-pipeline explosion. Since then an issue about how to prevent and control the sudden... To the potential oil-spill risk caused by offshore pipeline more attention has been paid after the Dalian oil spill incident from oil-pipeline explosion. Since then an issue about how to prevent and control the sudden oil-spill from the offshore pipeline has been raised. In this paper, we proposed an optimized model to analyze the main causes(probability) of spill and the consequence with the fuzzy comprehensive assessment model. Considering the complicated assessment process for oil-spill, the assessment factor system involving the spill probability and consequence was established based on the operative manual and statistic leakage/damage data of offshore pipeline in order to estimate the integrated spill risk score automatically. The evaluated factors of spill probability could be grouped into five aspects: corrosion, fatigue, national damage, third party, and operational fault; the consequence evaluated factors of spill included hazard of oil and impact-controlling capability. With some modifications based on experts' opinions, each of the evaluated factors in our work was developed with a relative weight and evaluation criterion. A test example for an offshore pipeline in the Bohai waters was described to show how the model can be used for an actual case in more detail. By using the oil-spill risk assessment model, it is easy to determine the risk level associated with the ongoing activity and management level and hence to take the risk mitigation action immediately. 展开更多
关键词 oil spill risk assessment spill probability spill consequence fuzzy comprehensive assessment model offshore pipeline
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A Jury-Based Trust Management Mechanism in Distributed Cognitive Radio Networks 被引量:2
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作者 SU Wengui LIAO Yang 《China Communications》 SCIE CSCD 2015年第7期119-126,共8页
In the trust management scheme of the distributed cognitive radio networks, the absence of the central control devices cause many problems such as a lack of standardized control for trust computation, and the absence ... In the trust management scheme of the distributed cognitive radio networks, the absence of the central control devices cause many problems such as a lack of standardized control for trust computation, and the absence of the decision makers in trust evaluation and collaborative decision making. A trust management mechanism based on the jury system for distributed cognitive radio networks is proposed in this paper. The "jury user" is designed to collaboratively examine the reputation of the cognitive user in the networks and to perform data fusion and spectrum allocation for distributed cognitive radio networks. Simulation analysis results show that the proposed scheme can ensure accuracy and fairness in trust evaluation and improve effectiveness and flexibility of spectrum allocation. 展开更多
关键词 cognitive radio network trust scheme jury system distributed network trust evaluation
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On-Line Life Monitoring Technique for Tube Bundles of Boiler High-Temperature Heating Surface
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作者 YangDong WangZhongyuan 《Electricity》 2005年第1期12-16,共5页
High-temperature heating surface such as superheater and reheater of large-sized utility boiler all experiences a relatively severe working conditions. The failure of boiler tubes will directly impact the safe and eco... High-temperature heating surface such as superheater and reheater of large-sized utility boiler all experiences a relatively severe working conditions. The failure of boiler tubes will directly impact the safe and economic operation of boiler. An on-line life monitoring model of high-temperature heating surface was set up according to the well-known L-M formula of the creep damages. The tube wall metal temperature and working stress was measured by on-line monitoring, and with this model, the real-time calculation of the life expenditure of the heating surface tube bundles were realized. Based on the technique the on-line life monitoring and management system of high-temperature heating surface was developed for a 300 MW utility boiler. An effective device was thus suggested for the implementation of the safe operation and the condition-based maintenance of utility boilers. 展开更多
关键词 utility boiler high-temperature heating surface tube wall metal temperature CREEP life assessment on-line monitoring
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Application of Charpy Impact Absorbed Energy to the Safety Assessment Based on SINTAP
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作者 王东坡 邓彩艳 +1 位作者 张玉凤 霍立兴 《Transactions of Tianjin University》 EI CAS 2006年第2期116-120,共5页
The European Structural Integrity Assessment Procedure(SINTAP) was applied to the assessment of welded joints of the API 5L X65 pipeline steel with an assumed embedded flaw and surface flaw at the weld toe. At defau... The European Structural Integrity Assessment Procedure(SINTAP) was applied to the assessment of welded joints of the API 5L X65 pipeline steel with an assumed embedded flaw and surface flaw at the weld toe. At default level( level 0), the assessment point was established by esti- mating fracture toughness value K1c conservatively from Charpy energy test data. At the same time, the analysis level 1 (basic level)was applied based on the fracture toughness CTOD. Then the two assessment levels were compared. The assessment results show that all assessment points are located within the failure lines of analysis levels 0 and 1. So the welded joint of the pipeline is safe. It can be concluded that the assessment based on Charpy absorbed energy is practicable when other fracture toughness data are not available, or cannot be easily obtained. The results are conservative. 展开更多
关键词 failure assessment diagram Charpy impact energy CTOD safety assessment
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