【摘 要】
：
近年来,城镇燃气发展迅速,不仅促进了国民经济水平的提高,而且改善了人们的生活条件。随着燃气输配管网在城市内部的大面积敷设,受自然因素和人为因素影响,管网人工挖掘、老
论文部分内容阅读
近年来,城镇燃气发展迅速,不仅促进了国民经济水平的提高,而且改善了人们的生活条件。随着燃气输配管网在城市内部的大面积敷设,受自然因素和人为因素影响,管网人工挖掘、老化和腐化现象比较严重,导致管网泄漏事故屡见不鲜,引发较多的安全问题,给城市燃气管网的安全性造成较大的侵袭和挑战。因此,加大对城镇燃气管网泄漏进行诊断具有必要性。
In recent years, the rapid development of urban gas has not only promoted the improvement of the national economy but also improved people’s living conditions. With the large-scale laying of gas transmission and distribution pipe network in the city, due to natural and man-made factors, the phenomenon of manual excavation, aging and corrosion of the pipe network is rather serious, leading to frequent accidents of pipe network leakage and causing more safety problems. The safety of urban gas pipeline network caused greater invasion and challenge. Therefore, increasing the town gas pipeline leak diagnosis is necessary.
其他文献
对废热回收器拆卸、检测、存在的问题及修复处理过程作一简要的总结，谨供同行参考。
120 cases of urolithlasis were randomly divided into 3 groups of 40 persons each.The first group was solely treated with an improved acupuncture method,the seco
The acupuncture treatment with Zi Wu Dao Jiu needling was used to treat thepostpartum retention of urine and produced a therapeutic effect better than that of u
针对大体积混凝土施工过程中，混凝土的内部温度测试的重要性，开发了一种高效的无线温度测试系统．从传感器的选择、系统设计和系统集成3个方面介绍了该系统的设计情况．通过实际应
基于低空无人遥感平台的行人目标检测与分析是航空监控领域的重要发展方向。针对该应用需求与发展现状,本文研究了低空无人遥感平台下的步态识别技术的起源及研究动态,并对该
In the present study, 100 patients suffering from gastroptosis were randomly dividedinto auricular-plaster group and acupuncture group. The effective rates of t
The medicated moxa stick was made by moxa wool combining with Chinesemedicines of strengthening the body resistance and reinforcing the spleen.74 patients of sp
Comparative observation was taken in 112 patients of hyperthyroidism. These patients were treated by both acupuncture and small dosage (10 mg once daily) of M
从硫化原理、催化剂的硫化方法及步骤等方面介绍了两种耐硫变换催化剂硫化方法的优缺点。