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张卫良 《杭州师范学院学报(社会科学版)》2014,(4):130-136
刘易斯·芒福德是一位伟大的城市思想家,在其毕生的学术研究中,城市是其最为关切的主题。他在前人的研究基础上探究城市文化、城市历史以及城市的未来。针对现代大都市的种种问题,芒福德倡导城市建设应该以城市文明为目标,以区域维度构建“区域城市”,促进城市的合理分布和社会的健康发展。“区域城市”是缓解现代大都市种种弊端的最终手段。中国现有新型城镇化发展路径的选择与芒福德的“区域城市”思想相接近,城乡一体化是摆脱大都市困境的一个发展方向。 相似文献
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WangZheng YangXin ShiPengfei 《高技术通讯(英文版)》2004,10(1):17-21
A segmentation model that combines the Mumford-Shah (M-S) model and narrow band scheme of level set is presented. The M-S model is a desirable model for image segmentation, but computationally time-consuming. This paper introduces a fast segmentation model, which combines the M-S model and narrow band scheme using new initialization method. The new initialization method is based on fastmarching method, and the computing time is O (n). In each iteration step, the new segmentation model only deals with the data in narrow band instead of the whole image. Comparing M-S model and new narrow band M-S, experiments show that the two models can obtain almost the same segmentation result, but the computing time of new narrow band M-S model is much less than M-S model. 相似文献
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