The flow of rural labor to urban is a significant phenomenon in China during the last 20 years.In spite of many researches focus on the driving force of economy
Based on the Chinese longitudinal healthy longevity survey conducted in 2002, this paper uses hierarchical linear model (HLM) to make an approach to the possibl
In this paper, an approach to simulate the spatial dis- tribution of urban population is proposed using urban land use and population statistical data through t
This paper explores and identifies the rules of the unsteady evolution of COD in the upper and middle reaches of Minjiang River through multi-scale analysis on
<正> This paper introduces the recent appearance of a circular economy in such industrialized countries as Germany and Japan and outlines its concept and princi