论文在分析现有的各种提取方法的基础上，结合城市道路在高分辨率遥感影像上的特点，提出一种半自动的道路提取法。
In this paper, according the characteristics of urban road in high-resolution remote images, a new semiautomatic extraction road approach is proposed based on the analysis of various existent ones.
本文结合FIDIC合同条件在北京四环路建设中的实际运用，就北京城市道路建设运用FIDIC的有关问题作一探讨。
Associated with the factual applications of FIDIC contract condition in the building of Beijing Fourth Circle Road some problems about how to use FIDIC are studied in the paper.
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