摘要
工作装置是液压挖掘机的重要组成部分。为研究工作装置在挖掘机整个作业循环时间里的运动情况,运用Pro/E软件的运动仿真模块对挖掘机工作装置进行运动仿真,获得铲斗斗尖部位的速度、加速度、位置与时间的关系,并绘制出铲斗斗尖在整个挖掘作业循环时间里的运动包络曲线。结果表明该方法简单、可靠,为挖掘机整机设计及性能评估提供一定的理论依据。
The effect of zinc nicotinate on growth performance and blood physiological parameters and Zn level of feces in piglets were investigated. The results showed that zinc nicotinate used as a feed additive for piglet diet could obviously improve the feed and gain ratio, growth and decrease diarrhea rate. Compared with zinc sulfate zinc nicotinate had a higher bioavailability, lower pollution and no toxicity. The experimental result in antibacterial test indicated that zinc nicotinate had a certain antibacterial activity and the antibacterial effect was better than that of zinc sulfate.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2012年第1期119-123,共5页
Acta Agriculturae Universitatis Jiangxiensis
基金
福建省科技厅重点项目资助（2009H0005）
关键词
挖掘机
工作装置
PRO/E
运动仿真
zinc nicotinate
piglet
growth performance
antibacterial activity
