The Spatio-Temporal Evolution about Urban Vulnerability on the Northeast Region since Northeast Revitalization
构建城市脆弱性综合评价体系，分析东北振兴以来东北地区城市脆弱性的时空演变，发现脆弱性总体下降、空间格局趋于均衡，资源型城市脆弱性降幅较大。
By constructing comprehensive evaluation system of urban vulnerability, using compensive index method and the visualization of GIS,this paper analyzed the spatial-temporal evolution of Urban vulnerability of the Northeast region in China since Northeast Revitalization.Results are shown as follows.In the time series, the evolution of vulnerability can be divided into a high- vulnerability leading stage(2003- 2006) and low- vulnerability leading stage(2007- 2011). The vulnerability of northeastern cities generally decreased and the vulnerability gap shrunk. The spatial pattern of urban vulnerability has become increasingly balanced. High- vulnerability cities show the characteristics ofclustering. Lowvulnerability cities and the northeast economic area basically match. Among provinces, eastern Inner Mongolia has the lowest vulnerability, followed by Liaoning and Jilin, while Heilongjiang has the highest degree of vulnerability. In terms of differences between areas, the other three regions have experienced decreasing volatility at the same time that the Heilongjiang area gap is widening.The degree of vulnerability of the regional central city is also decreasing, and the gap is also shrinking. Resource-based city have experienced a larger decline in vulnerability. The internal gap is unbalanced.Mechanisms of effect which the strategy of revitalizing northeast has on temporal and spatial pattern of city vulnerability evolution consist of several aspects, i.e. the adjustment of national strategy and the implementation of Important plans,the adjustment of regional industries and fiscal and financial support, the drive of regional opening policies and the optimization of spatial arrangement, the transformational policies of the resource type cities and so on.