A Visual Analytics System for Space–Time Dynamics of Regional Income Distributions Utilizing Animated Flow Maps and Rank-based Markov Chains

Regional income convergence and divergence has been an active field of research for more than 20 years, and research papers in this field are still being produced at a prodigious rate. Despite their importance for the study of dynamics of income distribution, interactive visualization tools revealing spatiotemporal dimensions of the income data have been sparsely developed. This study introduces a visual analytics system for the space–time analysis of income dynamics. We use state-level US income data from 1929 to 2009 to demonstrate the visual analytics system and its utility for exploring similar data. The system consists of two modules, visualization and analytics. The visualization module, a Web-based front-end called Rank-Path Visualizer (RPV), draws inspiration from the cartographic technique of flow mapping, originally developed by Tobler and embodied in his canonical Flow Mapper application.     

试论北京地区的新石器时代文化

北京地区处于东北和华北文化区的交汇地带,其新石器时代文化从距今10000多年一直延续到大约距今3800年。除雪山一期文化对外影响稍大外,其余时候并未形成强有力的中心。由于北京地区所具有的边缘地带的特点,使其不时成为多种文化因素汇聚的熔炉,以及联系东北、北方、中原、海岱文化系统的纽带,对"中国相互作用圈"的酝酿、形成和早期发展起到重要的作用。