分析了影响光纤电流纵差保护正常的原因，提出了旁代时通道的切换方案以及日常运行管理的几点建议。
Analysis of factors impacting on operation of optic protections, putting forward channel switch scheme of fiber protection when bypass breaker as line breaker.
解决了DDC核心安全问题，实现了DDC和其他业务系统及数据中心的数据接口，并给出了DDC的日常运行管理实现技术。
The article solves the core security problems of DDC, realizes the data interfaces of DDC with another business system and data center, announces the routine circulation management of DDC.
基于GIS数据库的燃气管道风险评估能指导燃气管道日常运行管理，对其进行较为客观的分析和决策，减少管道事故的发生和日常维护的工作量。
Gas pipeline risk grounded on GIS database instruct daily management of pipeline network by objective analysis and decision, reducing pipeline accident and work load of routine maintenance.
本文简单介绍广州地铁二号线屏蔽门系统的构成、运行管理和日常巡检和维护、故障分析，并重点介绍门机系统的工作原理和屏蔽门计划检修的项目。
In briefness intro Guangzhou metro Line 2 Platform Screen Door systemic structure, run, check, maintenance and fault, Platform Screen Door systemic elements and program check.
本文简单介绍广州地铁二号线屏蔽门系统的构成、运行管理和日常巡检和维护、故障分析，并重点介绍门机系统的工作原理和屏蔽门计划检修的项目。
In briefness intro Guangzhou metro Line 2 Platform Screen Door systemic structure, run, check, maintenance and fault, Platform Screen Door systemic elements and program check.
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