Results 1 to 10 of about 8,908 (123)
Research status and progress of hydrogen embrittlement of hydrogen pipelines [PDF]
, 2023 Hydrogen transportation through pipelines has extremely high economic value in realizing the development of the hydrogen energy industry and promoting efficient energy utilization.
Hongliang MING, Jianqiu WANG, Jianwei DU
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Construction of safety evaluation index system for high-grade steel pipeline [PDF]
, 2023 The occurrence of accidents to large-diameter high-grade steel pipelines, if any, will cause heavy casualties and property losses. Hence, it is very important to evaluate the safety state of large-diameter high-grade steel pipelines.
Feng WANG +6 more
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Virtual space in contemporary exhibitions [PDF]
, 2022 LAUREA MAGISTRALENell'era dell'informazione, basata sull'ampia applicazione della tecnologia della realtà virtuale e della tecnologia dell'informazione di rete, è nata la mostra virtuale online.
QIAN, JINYU
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Dianci bileiqi, 2022 “综合能源共用走廊”的出现使得油气金属管道与电力线路并行的现象越来越多，临近电力杆塔的金属管道易受到高幅值雷击杂散电流的破坏，管道破损甚至燃烧、爆炸的事故屡有发生，研究金属管道的防损防爆措施尤为重要。针对临近金属管道的电力杆塔混凝土桩基的散流问题，提出一种杆塔混凝土桩基外敷导电材料的防护措施。采用有限元软件COMSOL Multiphysics建立杆塔桩基散流模型，针对不同“管-塔”间距、外敷半径与面积等影响因素进行仿真计算分析，研究了单桩基外敷散流对管道电位、绝缘层耐压幅值以及接地电阻的影响 ...
姜志鹏 +6 more
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, 2017 本文在总结了前人LED的基础上,利用单片机智能控制的方法研究智能LED的设计和制备,利用色度学三基色配色原理,通过更改三基色LED的电流大小实现整体LED系统的调光和调色,系统可实现亮度20%-100%的调节,实现全彩调节,满足人们的多样化照明需求;同时可通过手机APP利用红外技术实现LED的无线遥控 ...
曹文越
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State-of-the-art and trend of emergency rescue communication technologies for coal mine [PDF]
, 2019 For the disaster area probing and emergency rescue in a mine,it is of great importance to employ the emergency communication system to communicate with each other,determine the places of trapped miners,and sense current status of disaster area.The hybrid
Binghao LI +4 more
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Dianci bileiqi, 2021 为了研究直流接地极周围金属管道的缓解线防护措施对降低管道泄漏电流密度防护效果的影响,通过CDEGS软件,建立了直流接地极、埋地金属管道和缓解线防护装置的仿真计算模型,依次分析缓解线敷设位置、缓解线与管道距离、缓解线与管道连接方式、缓解线半径、接地极和土壤参数对防护效果的影响,并得出如下结论:缓解线在管道的靠近直流接地极侧敷设比远离直流接地极侧敷设的效果更优;缓解线与管道间距离对防护效果的影响不明显,但缓解线靠近管道时的防护效果稍好;通过减小电缆连接线的间隔距离或增大缓解线半径的方式 ...
程宏波, 冯夏辉, 王勋, 曾晗
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Dianci bileiqi, 2022 当雷击中输电杆塔时，在雷电流的阻性耦合和感性耦合作用下，埋地管道上的感应电压会对防腐涂层造成威胁。笔者建立了管道与输电线路平行的模型，研究了土壤电阻率频变特性对管道感应电压的影响。计算表明，土壤电阻率频变特性会使管道金属电位和防腐层电位均有所下降，由于两者下降的程度相近，导致管道防腐层两端承受的电压无明显变化，而绝缘接头的电压则有明显的降低。
寇晓适 +7 more
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野生动物学报, 2023 川、滇、黔金丝猴（Rhinopithecus roxellana、Rh.bieti、Rh.brelichi）均为我国特有种，国家一级重点野生保护动物。作为典型的食叶动物，其肠道微生物组特性研究也备受学者关注。为探究川、滇、黔金丝猴肠道微生物组结构，促进金丝猴胃肠道健康及为相关疾病防控提供参考数据，以北京动物园管理处圈养的3种7只金丝猴为研究对象，采用16S rDNA测序及分析技术，开展相同圈养环境下3种金丝猴肠道微生物组差异研究。结果显示：圈养健康金丝猴肠道微生物组的优势菌门为厚壁菌门 ...
张媛媛 +7 more
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Study on mechanical behaviors of buried FRP pipeline under geological sedimentation [PDF]
Objective Compared to conventional metal pipelines, fiber-reinforced plastic (FRP) pipelines demonstrate superior strength and lightweight properties. They have been progressively integrated into the station gathering and transmission segment within oil ...
Cong WANG +5 more
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