The pipeline all-position automatic welding machine system is a special welding system for automatically welding circumferential joint of pipeline on site, whic
This paper deals with the numerical simulation of incompressible turbulent boundary flow of a flat plate with the pseudo-spectral matrix method. In order to app
The network design problem (NDP) is one of the most difficult and challenging problems in trans-portation. Traditional NDP models are often posed as a determini
The complexity of modern seismically isolated structures requires the analysis of the structural system and the isolation system in its entirety and the ability
For building the analytical model of mean temperature in rail universal rolling, the cross-section ofworkpieces and the profile of horizontal roll and vertical
Buckling-restrained braces(BRBs)have recently become popular in the United States for use as primary members of seismic lateral-force-resisting systems.A BRB is a steel brace that does not buckle in c
产品保证与产品质量和价格密切相关,在动态变化的市场环境中,如何通过产品保证优化管理实现保证政策与产品质量和价格三者的均衡,对扩大产品市场占有率、提高企业利润有重要
A series of experiments has been done in a moderate-velocity cavitation tunnel to investigate the effects of attack angle change on hydrodynamic characters of s