Literature review indicates that most studies on pavement management have been on reconstruction and rehabilitation, but not on maintenance;this includes routine, corrective and preventive maintenance. This study deve...Literature review indicates that most studies on pavement management have been on reconstruction and rehabilitation, but not on maintenance;this includes routine, corrective and preventive maintenance. This study developed linear regression models to estimate the total maintenance cost and component costs for labor, materials, equipment, and stockpile. The data used in the model development were extracted from the pavement and maintenance management systems of the Nevada Department of Transportation (NDOT). The life cycle maintenance strategies adopted by NDOT for five maintenance prioritization categories were used as the basis for developing the regression models of this study. These regression models are specified for each stage of life-cycle maintenance strategies. The models indicate that age, traffic flow, elevation, type of maintenance, maintenance schedule, life cycle stage, and the districts where maintenances are performed all are important factors that influence the magnitude of the costs. Because these models have embedded the road conditions into the life-cycle stage and type of maintenance performed, they can be easily integrated into existing pavement management systems for implementation.展开更多
In recent years, with the rapid development of my countrys economy and science and technology, a variety of advanced technologies such as informatization, multimedia, and the Internet have been widely used in various ...In recent years, with the rapid development of my countrys economy and science and technology, a variety of advanced technologies such as informatization, multimedia, and the Internet have been widely used in various fields of society, promoting the continuous improvement of the production level in the field. Under this circumstance, in order to better adapt to the development trend of the new era, my countrys broadcasting industry must pay more attention to the application of the medium-wave broadcasting signal transmission system. Efficiency is comprehensively improved. Based on this, it focuses on analyzing and exploring the specific structure of the medium-wave broadcast transmission system and the application measures of daily maintenance technology for the reference of relevant staff.展开更多
文摘Literature review indicates that most studies on pavement management have been on reconstruction and rehabilitation, but not on maintenance;this includes routine, corrective and preventive maintenance. This study developed linear regression models to estimate the total maintenance cost and component costs for labor, materials, equipment, and stockpile. The data used in the model development were extracted from the pavement and maintenance management systems of the Nevada Department of Transportation (NDOT). The life cycle maintenance strategies adopted by NDOT for five maintenance prioritization categories were used as the basis for developing the regression models of this study. These regression models are specified for each stage of life-cycle maintenance strategies. The models indicate that age, traffic flow, elevation, type of maintenance, maintenance schedule, life cycle stage, and the districts where maintenances are performed all are important factors that influence the magnitude of the costs. Because these models have embedded the road conditions into the life-cycle stage and type of maintenance performed, they can be easily integrated into existing pavement management systems for implementation.
文摘In recent years, with the rapid development of my countrys economy and science and technology, a variety of advanced technologies such as informatization, multimedia, and the Internet have been widely used in various fields of society, promoting the continuous improvement of the production level in the field. Under this circumstance, in order to better adapt to the development trend of the new era, my countrys broadcasting industry must pay more attention to the application of the medium-wave broadcasting signal transmission system. Efficiency is comprehensively improved. Based on this, it focuses on analyzing and exploring the specific structure of the medium-wave broadcast transmission system and the application measures of daily maintenance technology for the reference of relevant staff.
