城市路网空间结构对住宅价格的影响分析

以链家房产交易平台和安居客房产交易平台的上海市二手住宅为研究样本，结合OpenStreetMap(OSM)提供的城市路网数据及高德地图提供的兴趣点(POI)等多源数据，利用空间句法测算路网空间结构的选择度和整合度.基于空间自回归模型、地理加权回归模型等空间计量估计方法，研究城市路网空间结构影响住宅价格的效果及机制.研究结果表明：城市路网空间结构是影响住宅价格的重要的区位因素，考虑空间相关性是必要的；与市中心住宅价格相比，郊区住宅价格对路网空间结构的依赖程度更强.

Structure Design and Electrical Performance Study of the Angular Contact-Separation TENG with Multi-Dielectric Plate Pairs

Triboelectric nanogenerator (TENG) technology has broad application prospects in many fields because of its advantages of simple production,light weight and high efficiency.In the existing configurations of the contact-separation TENG,the configuration with the dielectric plates placed in parallel is the most popular.However,the studies on the configuration with the dielectric plates placed at an angle ( called angular contact-separation TENG in this paper ) are really rare.In fact,compared with the former,the latter is more space-saving and convenient for packaging,thus its application potential is huge.Based on the situation, A conception of the angular contact-separation TENG with multi dielectric pairs is proposed,in which a plurality of polar plates are arranged circumferentially so that each plate and its neighbouring plate are paired to form a friction dual thus all the plates forming a multi dual angular contact-separation structure to generate electricity.The variations of the parameters such as potential distribution,open circuit voltage,electrode charge of the proposed TENG with the polar angle or with time are studied by the finite element simulation software named COMSOL Multiphysics.The results show that:1) the open circuit voltage of the single plate pair increases with the polar angle;2) the average open circuit voltage of N plate pairs “in series” is N times of that of the single plate pair;3) the amount of the electrode charge increases slowly with the angle between the two plates;4) the potential distribution in the main area of the plate is relatively uniform,but it shows obvious edge effect at the end of the plate.