直埋敷设热力管道取消固定支座的可行性

本文从热力管道直埋敷设的固定支座功能出发，分析了取消固定支座后管道的状况及应力分布，讨论了取消固定支座以提高设计的科学性，节省资金的可能性。     

Forecast Error and Predictability for the Warm-sector and the Frontal Rainstorm in South China

In south China, warm-sector rainstorms are significantly different from the traditional frontal rainstorms due to complex mechanism, which brings great challenges to their forecast. In this study, based on ensemble forecasting, the high-resolution mesoscale numerical forecast model WRF was used to investigate the effect of initial errors on a warmsector rainstorm and a frontal rainstorm under the same circulation in south China, respectively. We analyzed the sensitivity of forecast errors to the...     

谈山岭重丘区公路线形与地形的协调问题

山岭重丘区修建高等级公路,由于山区自然条件复杂,地形多变、公路设计应按交通学要求,采用与自然地形相协调的几何线形,以提高行车速度,节省工程费用,增加经济效益。