期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
湖北省综合交通运量现状特征分析 被引量:2
1
作者 童小龙 谢辉 梁星灿 《综合运输》 2022年第10期158-161,共4页
交通运输量特征是综合交通网络与枢纽运行情况和制定交通发展政策的重要依据。本文以湖北省交通客货运量历史统计数据为基础,以定性与定量相结合方法,分析交通运输量发展特征,对于厘清湖北省“十四五”综合交通发展思路具有借鉴价值。
关键词 交通运输量 特征分析 定性与定量相结合方法 综合交通
原文传递
钻孔岩体结构均质区划分方法研究 被引量:1
2
作者 魏翔 杨春和 +2 位作者 王贵宾 陈世万 霍亮 《长江科学院院报》 CSCD 北大核心 2017年第11期72-76,83,共6页
岩体结构均质区是针对实际工程特点而划定的成果,在实践过程中需要根据具体工程,抓住主要矛盾后,选择最具影响性的要素作为划分依据。针对高放废物深地质处置工程中钻孔岩体渗透性研究,提出了定性和定量相结合的钻孔岩体结构均质区划分... 岩体结构均质区是针对实际工程特点而划定的成果,在实践过程中需要根据具体工程,抓住主要矛盾后,选择最具影响性的要素作为划分依据。针对高放废物深地质处置工程中钻孔岩体渗透性研究,提出了定性和定量相结合的钻孔岩体结构均质区划分方法。研究表明:基于结构面力学成因的定性岩体结构均质区划分方法存在对破碎带和蚀变带等细节考虑不足的问题,而以定量分区为主的岩体结构统计均质区划分方法(Miller法),未考虑影响岩体渗透性的主要因素结构面隙宽。最后得出将定性和定量相结合的方法来确定均质区效果更佳,这样既可以考虑到更多的结构面参数,同时也可以细化分区范围。此均质区划分方法结果能为后续的结构面网络建模及渗流计算提供数据支持。 展开更多
关键词 岩体结构 均质区划分方法 力学成因 Miller法 定性与定量相结合的方法
下载PDF
Post-evaluation of a water pollution control plan: methodology and case study 被引量:1
3
作者 Lin ZENG Xin DONG Siyu ZENG Tianzhu ZHANG Jing LI Jining CHEN 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2015年第4期712-724,共13页
China has developed more than 20 water pollution control plans for river basins (RBWPs) since 1996. However, the implementation has generally lagged. This paper proposes a three-step, post-evaluation methodology to ... China has developed more than 20 water pollution control plans for river basins (RBWPs) since 1996. However, the implementation has generally lagged. This paper proposes a three-step, post-evaluation methodology to analyze the implementation result of a RBWP and its influential factors. First, a multi-attribute evaluation method based on an index system is established to score the enforcement results of a RBWP. Indicators measure how well a RBWP has achieved its objectives, which include water quality compliance, pollution load control, project construction, financial inputs, and related management requirements. Second, an interpretive structural model is used to detect the significant factors that affect RBWP implementation. This model can effectively analyze the cause-effect chain and hierarchical relationship among variables. Five groups of factors were identified, namely, plan preparation, water resource endowment, policy, institution, and management. Both qualitative and quantitative methods are employed in the third step to evaluate the extent to which these factors have influenced the execution result of a RBWP, including pre-post contrast, scenario analysis, and correlation analysis. This research then post-evaluated the implementation of the Huai River Basin water pollution control plans (H-RBWPs) over a period of 10 years as a case study. Results showed that the implementation of the H-RBWPs was unsatisfactory during 2001–2005, although it improved during 2006–2010. The poor execution of these plans was partially caused by the underestimation of regional economic development in combination with ineffective industrial structure adjustment policies. Therefore, this case study demonstrates the feasibility and flexibility of the proposed post-evaluation methodology. 展开更多
关键词 river basin water pollution control plan postplan evaluation multi-attribute comprehensive evaluation interpretive structural model combined qualitative/quantitative method
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部