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According to the fourth assessment report of IPCC (Intergovernmental Panel on Climate Change), global warming owns more than 90% to human activities. And quantification of human-induced CO2 emission at fine space and time resolution has a critical need in carbon cycle and climate change research. Carbon emission from urban traffic caused by burning fossil fuels is a key source in the process of urbanization...
Chemical release emergency occurred in cities easily cause large scale injuries in short time. Evacuation and shelter-in-place are two alternative response activities. In china, emergency manager usually prefer the former because many buildings are not well airtight. Also, the proportion of the residents evacuating by walk and by vehicle is high. Evacuation route has a crucial impact on the effectiveness...
According to the road extraction from moderate and low resolution aerial image, this paper presents a fast method which is based on sorting. In the initial stage of the method, an algorithm for detecting ridge or ribbon like linear features based on sorting and simple judgment scheme is adopted; after thinning the centerline, using the initial image road features to check the correctness of the result,...
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