Results 1 to 10 of about 541 (124)
节能环保, 2022 论文结合南昌市燃气集团湾里站—乐化站一标段高压燃气外防腐层及阴极保护电位与干扰电流检测项目的检测数据作为数据依据，介绍了通过交流电流衰减法（多频管中电流法）、交流电位梯度法技术检测燃气管道外防腐层总体质量状况及外防腐层破损情况。
陈 胜强
semanticscholar +2 more sources
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
core +1 more source
Application of domestic cloud simulation software CloudLPS for liquid pipelines [PDF]
, 2023 The Cloud-based Liquid Pipeline Simulator(CloudLPS) is a universal liquid pipeline simulation software with completely independent intellectual property rights in China. Herein, its applications are introduced.
Bo YU +8 more
core +1 more source
Production Mechanisms and Control Strategies of Patulin in Food(食品中展青霉素的产生机制及污染防控策略) [PDF]
Shipin kexue jishu xuebao, 2023 Patulin, a polyketide secondary metabolite produced by fungi, is a major mycotoxin in fruits and their processed products. Penicillium expansum is the primary agent for patulin contamination in food. P.
LI Boqiang(李博强) +3 more
doaj +1 more source
Mitigation methods and their applicability for DC stray current interference [PDF]
, 2016 Through indoor simulated experimental equipment,mitigation methods which contained the bond resistor method,galvanic anode method and metallic shield method were studied to mitigate DC stray current interference caused by the impressed current cathodic ...
DU Yan-xia, LI Wei, WANG Jie-jun
core +1 more source
Dianci bileiqi, 2021 超/特高压直流输电线路瓷和玻璃绝缘子铁帽电腐蚀问题突出,有效的防腐蚀措施对电力系统的安全稳定运行具有重要意义。为了确定绝缘子铁帽表面喷涂隔离涂层的关键参数,本研究建立了绝缘子三维有限元模型,计算了绝缘子铁帽表面隔离涂层不同喷涂情况下的泄漏电流密度和电位分布,并试验验证了隔离涂层防铁帽腐蚀的可行性。研究结果表明:隔离涂层能够有效减小绝缘子铁帽的泄漏电流密度,绝缘子铁帽泄漏电流密度最大值随着隔离涂层高度的增加而增大,隔离涂层高度变化对绝缘子表面电位分布的影响较小;隔离能够对绝缘子铁帽起到有效的防腐蚀作用 ...
唐平 +4 more
doaj
Indentation effect on the fatigue limit of axle steel [PDF]
, 2016 A hardness tester was used to make indentations on the hourglass fatigue specimens of axle steel,and notches were machined by electronic discharge machining(EDM).The fatigue limits of both indentation specimens and notched ones were examined and compared
DAI Guang-ze +4 more
core +1 more source
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
doaj
Jianzhu Gangjiegou Jinzhan, 2023 钢结构在现代建筑中有着广泛应用，但钢材的耐腐蚀性较差，锈蚀将降低钢构件的承载力甚至影响结构安全。对钢构件防腐涂层进行定期检测与维护是保证钢结构耐腐蚀性能的主要方法之一。为实现钢构件防腐涂层表面缺陷的自动识别，结合图像处理技术与支持向量机分类算法进行钢构件防腐涂层空鼓、裂纹、剥落3种缺陷的检测。在图像处理阶段，采用自适应中值滤波去除图像噪声，并基于Otsu阈值和改进的Canny算子对增强图像进行分割；在特征提取阶段，提取出包含简单几何特征、不变矩特征、投影特征及纹理特征的65维缺陷图像特征 ...
王亦君, 蒋首超
doaj
Soft detection model of corrosion leakage risk based on KNN and random forest algorithms [PDF]
Objective The integrity management of urban gas pipeline networks demands effective risk assessment methods. Corrosion leakage risk assessment necessitates the comprehensive integration of risk assessment factors with various detection operations ...
Chengzhi LI +4 more
core +1 more source