A new virtual age repair model with non-uniform aging speed is presented on the basis of Kijima classical virtual age repair models which can be viewed as of uniform aging nature.In this model are included three types...A new virtual age repair model with non-uniform aging speed is presented on the basis of Kijima classical virtual age repair models which can be viewed as of uniform aging nature.In this model are included three types,of perfect,of imperfect and of minimal,all having a non-uniform aging speed.Formulas of expected count of repair and length of working time of these three models are derived,and numerical examples are also given to illustrate and verify obtained theoretical indices.As an extended work,a sketchy model of maintenance time of the non-uniform aging virtual age repair model is discussed.Overall,the three models discussed in the paper,each with non-uniform aging speed,are expansions to existing virtual age repair models,relevant formulas given here are new results,and the systems introduced are without the lifetime distribution assumption,all of which may be expected to improve maintenance work.展开更多
Children and adults are often exposed to lead in homes as a result of deteriorating lead-based paint surfaces and any disturbance to those surfaces. There are a number of laws, regulations, standards and guidance docu...Children and adults are often exposed to lead in homes as a result of deteriorating lead-based paint surfaces and any disturbance to those surfaces. There are a number of laws, regulations, standards and guidance documents in place aimed at minimization of lead dust contamination following renovation and repair activities. These laws and regulations are oftentimes confusing and conflicting for the maintenance contractor who has limited time and resources for researching the right and appropriate course of action. This paper provides a comprehensive review and discussion of the lead laws, regulations, standards and guidelines for contractors.展开更多
研究近场通信(Near Field Communication,NFC)技术在配电架空线路带电抢修作业中的应用。通过分析NFC技术原理,结合配电线路抢修工作需求,设计基于NFC技术的智能化抢修管理系统,将NFC标签植入线路设备、杆塔、关键连接点,实现设备身份...研究近场通信(Near Field Communication,NFC)技术在配电架空线路带电抢修作业中的应用。通过分析NFC技术原理,结合配电线路抢修工作需求,设计基于NFC技术的智能化抢修管理系统,将NFC标签植入线路设备、杆塔、关键连接点,实现设备身份快速识别、巡检数据实时采集。应用结果表明,该技术能够提高抢修效率,降低安全风险,为配电线路智能化运维提供技术支持。展开更多
基金Sponsored by the Program for New Century Excellent Talents in University of China(NCET-05-0180)
文摘A new virtual age repair model with non-uniform aging speed is presented on the basis of Kijima classical virtual age repair models which can be viewed as of uniform aging nature.In this model are included three types,of perfect,of imperfect and of minimal,all having a non-uniform aging speed.Formulas of expected count of repair and length of working time of these three models are derived,and numerical examples are also given to illustrate and verify obtained theoretical indices.As an extended work,a sketchy model of maintenance time of the non-uniform aging virtual age repair model is discussed.Overall,the three models discussed in the paper,each with non-uniform aging speed,are expansions to existing virtual age repair models,relevant formulas given here are new results,and the systems introduced are without the lifetime distribution assumption,all of which may be expected to improve maintenance work.
文摘Children and adults are often exposed to lead in homes as a result of deteriorating lead-based paint surfaces and any disturbance to those surfaces. There are a number of laws, regulations, standards and guidance documents in place aimed at minimization of lead dust contamination following renovation and repair activities. These laws and regulations are oftentimes confusing and conflicting for the maintenance contractor who has limited time and resources for researching the right and appropriate course of action. This paper provides a comprehensive review and discussion of the lead laws, regulations, standards and guidelines for contractors.
文摘研究近场通信(Near Field Communication,NFC)技术在配电架空线路带电抢修作业中的应用。通过分析NFC技术原理,结合配电线路抢修工作需求,设计基于NFC技术的智能化抢修管理系统,将NFC标签植入线路设备、杆塔、关键连接点,实现设备身份快速识别、巡检数据实时采集。应用结果表明,该技术能够提高抢修效率,降低安全风险,为配电线路智能化运维提供技术支持。
