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城市工业经济空间网络格局分析——以浙江省为例 被引量:2
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作者 王庆喜 李建成 《华东经济管理》 CSSCI 北大核心 2017年第1期23-28,共6页
文章依据Sankey能量图思想一般性分析了浙江省工业经济企业地理分布与行业分布情况,然后采用修正的引力模型与社会网络分析方法研究浙江省工业经济联系网络格局,并将网络结构分为三个层次。研究发现:在顶层网络中,浙江省呈现出三角格局... 文章依据Sankey能量图思想一般性分析了浙江省工业经济企业地理分布与行业分布情况,然后采用修正的引力模型与社会网络分析方法研究浙江省工业经济联系网络格局,并将网络结构分为三个层次。研究发现:在顶层网络中,浙江省呈现出三角格局,杭州市与绍兴市则在全省工业经济的中间转移、中间引导中承担着重要角色;中层网络呈现出以杭州等四市为顶点的菱形网络结构辐射全省的格局,台州市和温州市在区域中与其他城市工业联系紧密的地位逐步体现,两市在区域工业经济联系"桥梁"的作用上变得更加突出;底层网络各市工业经济发展优先选择邻市结盟,总体网络联系紧密;浙江省工业经济格局存在4个城市子群,子群内部城市联系强度从浙北的第一子群往浙南呈明显梯级递减趋势,子群辐射能力也呈梯级递减趋势。据此提出浙江省工业经济空间结构优化与发展的政策建议。 展开更多
关键词 工业经济 网络格局 城市子群 浙江
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Particle swarm optimization for train schedule of Y-type train routing in urban rail transit 被引量:2
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作者 WEI Zi-wen 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2020年第1期87-93,共7页
The train schedule usually includes train stop schedule,routing scheme and formation scheme.It is the basis of subway transportation.Combining the practical experience of transport organizations and the principle of t... The train schedule usually includes train stop schedule,routing scheme and formation scheme.It is the basis of subway transportation.Combining the practical experience of transport organizations and the principle of the best match between transport capacity and passenger flow demand,taking the minimum value of passenger travel costs and corporation operating costs as the goal,considering the constraints of the maximum rail capacity,the minimum departure frequency and the maximum available electric multiple unit,an optimization model for city subway Y-type operation mode is constructed to determine the operation section of mainline as well as branch line and the train frequency of the Y-type operation mode.The particle swarm optimization(PSO)algorithm based on classification learning is used to solve the model,and the effectiveness of the model and algorithm is verified by a practical case.The results show that the length of branch line in Y-type operation affects the cost of waiting time of passengers significantly. 展开更多
关键词 urban traffic train schedule particle swarm optimization(PSO) classification learning Y-type train routing
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