运用动态有限元方法,对救灾物资的超低空空投过程进行了数值仿真.初步建立了超低空空投过程的计算模型,计算模拟了实际的典型空投......

介绍了目前国内市场占有率较高的KAMAT泵站和RMI泵站的整体结构,从减速系统、液力系统、润滑系统、保护系统、控制系统等方面对其......

This paper makes an attempt to answer why the observed critical Shields stress for incipient sediment motion deviates fr......

Objective: To identify the impact of an abnormally large neonatal chest circumference relative to head circumference on ......