期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
基于灰色系统理论的水库移民安置进度偏差预测分析 被引量:5
1
作者 李贵博 姚凯文 +1 位作者 张丹 李宁宁 《中国农村水利水电》 北大核心 2020年第3期186-188,195,共4页
水库移民安置工程是整个水利工程的重要组成部分,移民安置工作的顺利进行,直接影响到坝区及库区其他工程的实施。采用国内某移民工程实例,采用灰色系统理论,建立GM(1,1)模型,对其三年间的六次移民搬迁人口数据进行偏差预测分析,并提出... 水库移民安置工程是整个水利工程的重要组成部分,移民安置工作的顺利进行,直接影响到坝区及库区其他工程的实施。采用国内某移民工程实例,采用灰色系统理论,建立GM(1,1)模型,对其三年间的六次移民搬迁人口数据进行偏差预测分析,并提出合理化建议,旨在使移民安置部门及时定量了解安置进度的偏差情况,对其在整个工程的进度控制上提供有效依据,从而推动整个移民安置工作能够按计划进行。分析结果表明,该模型在水库移民安置进度偏差预测上精度较高,可用于中长期预测。目前,该工程移民搬迁安置工作较规划完工时间有所滞后,需采取有效措施加快工程进度。 展开更多
关键词 水库移民安置 灰色系统理论 GM(1 1)模型 偏差预测 进度控制
下载PDF
Numerical simulatim of rainwater accumulation and flow characteristics over windshield of high-speed trains 被引量:5
2
作者 DU Jian liANG Xi-feng +2 位作者 li gui-bo TIAN Hong-lei YANG Ming-zhi 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第1期198-209,共12页
In this paper, a Euler-Lagrangian particle/fluid film/VOF coupled multiphase flow model is presented. Numerical simulations are conducted, and the rainwater accumulation and flow characteristics over two types of wind... In this paper, a Euler-Lagrangian particle/fluid film/VOF coupled multiphase flow model is presented. Numerical simulations are conducted, and the rainwater accumulation and flow characteristics over two types of windshields are studied based on the presented model. The results show that an uneven water film is formed over the windshield, with rain water accumulation occurring for the concave windshield but not for the convex windshield. At low speeds, the average fluid-film thickness for a concave windshield is larger than that of a convex windshield;however, a minor difference occurs between these two values at high speeds, and a critical velocity is observed for the two types of windshields. When the train velocity is less than the critical velocity, the fluid film at the lower part of the windshield and the train nose flows downward, and beyond the critical velocity, the fluid film over the entire windshield and train nose flows upward. 展开更多
关键词 high-speed train WINDSHIELD rainwater accumulation aerodynamic characteristics
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部