随着互联网出行方式的迅速变化,城市居民快速增长的网约车(Internet private hire vehicle,IPHV)出行需求与服务车辆资源之间的供需矛盾日渐突出.针对网约车出行需求预测基础理论的研究,对国内外大量文献进行了梳理和分析.首先分析了网...随着互联网出行方式的迅速变化,城市居民快速增长的网约车(Internet private hire vehicle,IPHV)出行需求与服务车辆资源之间的供需矛盾日渐突出.针对网约车出行需求预测基础理论的研究,对国内外大量文献进行了梳理和分析.首先分析了网约车用户出行影响因素;然后从时间维度和事件维度详细综述了网约车出行需求预测的内容、方法和关键技术,对比了各类预测方法的优缺点;最后,总结了既有研究存在的主要问题,并进一步提出了未来的研究方向.展开更多
Based on the abundant outcrops and 3 D seismic data in Yuanba and its surrounding areas in northeastern Sichuan Basin,the characteristics,main controlling factors and development regularities of reservoirs in the four...Based on the abundant outcrops and 3 D seismic data in Yuanba and its surrounding areas in northeastern Sichuan Basin,the characteristics,main controlling factors and development regularities of reservoirs in the fourth member of Sinian Dengying Formation(shortened as Deng 4 Member)were analyzed comprehensively.The results show that the reservoirs were mainly developed in microbial dolomite associated with the microbial mound and dolarenite associated with grain beach,and had intergranular dissolution pores,inter-frame dissolution pores and karst caves as main storage space.The reservoirs were large in scale and strong in heterogeneity.The analysis of the reservoir genetic mechanisms shows that the reservoirs in the fourth member of Dengying Formation were the products of karstification on mound-beach facies deposited in the second episode of Tongwan movement.The karstification had the marks of eogenetic karstification such as granophyric karst system and half-dissociation zone.The reservoirs were controlled by the sedimentary facies belt,the mound beach facies was the decisive factor in reservoir development.Further analysis indicates that the Yuanba area had a geological background of well-developed platform margin mound beach facies,so mound beach bodies can be taken as a favorable exploration target.展开更多
文摘随着互联网出行方式的迅速变化,城市居民快速增长的网约车(Internet private hire vehicle,IPHV)出行需求与服务车辆资源之间的供需矛盾日渐突出.针对网约车出行需求预测基础理论的研究,对国内外大量文献进行了梳理和分析.首先分析了网约车用户出行影响因素;然后从时间维度和事件维度详细综述了网约车出行需求预测的内容、方法和关键技术,对比了各类预测方法的优缺点;最后,总结了既有研究存在的主要问题,并进一步提出了未来的研究方向.
基金Supported by the China National Science and Technology Major Project(2017ZX05005-003-006)
文摘Based on the abundant outcrops and 3 D seismic data in Yuanba and its surrounding areas in northeastern Sichuan Basin,the characteristics,main controlling factors and development regularities of reservoirs in the fourth member of Sinian Dengying Formation(shortened as Deng 4 Member)were analyzed comprehensively.The results show that the reservoirs were mainly developed in microbial dolomite associated with the microbial mound and dolarenite associated with grain beach,and had intergranular dissolution pores,inter-frame dissolution pores and karst caves as main storage space.The reservoirs were large in scale and strong in heterogeneity.The analysis of the reservoir genetic mechanisms shows that the reservoirs in the fourth member of Dengying Formation were the products of karstification on mound-beach facies deposited in the second episode of Tongwan movement.The karstification had the marks of eogenetic karstification such as granophyric karst system and half-dissociation zone.The reservoirs were controlled by the sedimentary facies belt,the mound beach facies was the decisive factor in reservoir development.Further analysis indicates that the Yuanba area had a geological background of well-developed platform margin mound beach facies,so mound beach bodies can be taken as a favorable exploration target.
