2017年对潜山县越冬代马尾松毛虫进行了飞机防治,结合飞机防治,进行了AS350B3(小松鼠)直升机施药试验。结果表明,从药后20 d虫口减退率来看,25%灭幼脲Ⅲ450 m L/hm^2+5.7%甲维盐150 m L/hm^2和1.2%苦·烟乳油600 m L/hm^2兑水4 500...2017年对潜山县越冬代马尾松毛虫进行了飞机防治,结合飞机防治,进行了AS350B3(小松鼠)直升机施药试验。结果表明,从药后20 d虫口减退率来看,25%灭幼脲Ⅲ450 m L/hm^2+5.7%甲维盐150 m L/hm^2和1.2%苦·烟乳油600 m L/hm^2兑水4 500、5 000 m L/hm^2,及1%苦参碱乳油600 m L/hm^2兑水5000 m L/hm^2均达到防治效果要求。考虑到防治用药成本以及最大限度减少环境干扰,建议采用25%灭幼脲450 m L/hm^2+5.7%甲维盐150 m L/hm^2兑水4 500 m L/hm^2防治。展开更多
The challenges posed by fatigue propagation on engineering materials and infrastructural facilities have necessitate for proper appraisal. Fatigue involvements in engineering systems are complex requiring indepth anal...The challenges posed by fatigue propagation on engineering materials and infrastructural facilities have necessitate for proper appraisal. Fatigue involvements in engineering systems are complex requiring indepth analysis and optimization of the governing phenomena. The pervasive demand for suitable solutions to this circumstance has been the greatest problem faced by the systems engineers in the quest for delivering sustainable infrastructural development. Consequently, the removal of interdisciplinary boundaries and merge of design platforms pose a great challenge for an unprepared project engineering and technology community. It is imperative to understand the mechanisms promoting fatigue occurrences for a complete model conceptualisation and analysis improvement. In this paper, the duo evaluation--linear and effective crack length measurements are clearly shown to beacon the fatigue investigation for modem project engineering and technology. The paper has also examined the airfield pavement where this concept could be very useful. Such breakthrough would require accurate fatigue simulation and modelling platforms for inbuilt reliability and prudent resources management. Amongst the benefits of the fatigue analysis is the provision of an enabling environment for the sustainable management of engineering and technology projects.展开更多
文摘2017年对潜山县越冬代马尾松毛虫进行了飞机防治,结合飞机防治,进行了AS350B3(小松鼠)直升机施药试验。结果表明,从药后20 d虫口减退率来看,25%灭幼脲Ⅲ450 m L/hm^2+5.7%甲维盐150 m L/hm^2和1.2%苦·烟乳油600 m L/hm^2兑水4 500、5 000 m L/hm^2,及1%苦参碱乳油600 m L/hm^2兑水5000 m L/hm^2均达到防治效果要求。考虑到防治用药成本以及最大限度减少环境干扰,建议采用25%灭幼脲450 m L/hm^2+5.7%甲维盐150 m L/hm^2兑水4 500 m L/hm^2防治。
文摘The challenges posed by fatigue propagation on engineering materials and infrastructural facilities have necessitate for proper appraisal. Fatigue involvements in engineering systems are complex requiring indepth analysis and optimization of the governing phenomena. The pervasive demand for suitable solutions to this circumstance has been the greatest problem faced by the systems engineers in the quest for delivering sustainable infrastructural development. Consequently, the removal of interdisciplinary boundaries and merge of design platforms pose a great challenge for an unprepared project engineering and technology community. It is imperative to understand the mechanisms promoting fatigue occurrences for a complete model conceptualisation and analysis improvement. In this paper, the duo evaluation--linear and effective crack length measurements are clearly shown to beacon the fatigue investigation for modem project engineering and technology. The paper has also examined the airfield pavement where this concept could be very useful. Such breakthrough would require accurate fatigue simulation and modelling platforms for inbuilt reliability and prudent resources management. Amongst the benefits of the fatigue analysis is the provision of an enabling environment for the sustainable management of engineering and technology projects.
