共查询到20条相似文献，搜索用时 15 毫秒
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Steven M. Graves 《Urban geography》2013,34(6):889-890
Globalization is constituted not only through interurban networks of global city regions, but also by intraurban linkages within city regions. In this article, we use the Madrid city region as a case study to analyze the emergence of new “globalization arenas”—dense agglomeration nodes of knowledge-intensive business services (KIBSs)—on the outskirts of large metropolises (METs). We focus on two distinct types of centers. New employment centers (NECs) are produced by intrametropolitan suburbanization and realignment of preexisting small agglomerations. Historic administrative cities (HACs) are created by suprametropolitan scale processes remaking historically autonomous centers beyond the MET, which are only now being articulated in metropolitan transformation. We use statistical, cartographic, and econometric techniques to analyze proximity and economic base characteristics of NECs and HACs. As KIBSs continue to evolve in patterns of decentralized concentration, HACs are becoming more important KIBS nodes amidst complex landscapes of functional specialization and repositioning. 相似文献
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通过对中国沙区厚壁荠属Pachypterygium
Bunge、四棱荠属Goldbachia DC.、菘蓝属Isatis L.和独行菜属Lepidium L.植物的研究,认为《中国沙漠植物志》收录的密花厚壁荠Pachypterygium
densiflorum Bunge和多茎厚壁荠P. multicaule (Kar.et Kir.) Bunge实为一种植物;短梗四棱荠Goldbachia
laevigata (M.B.) DC. var. ikonnikovii (Vass.) Kuan et Y.C.Ma应合并到正种四棱荠G.
laevigata (M.B.) DC.中;毛三肋菘蓝Isatis costata C.A.Mey var.lasiocarpa (Ledeb.)
N.Busch应改为毛果菘蓝I.tinctoria L.var. Praecox (Kit.) Koch.; 头花独行菜Lepidium
capitatum Hook. f. et Thoms.中国沙区无分布。 相似文献
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H. C. Halls 《Geophysical Journal International》1977,48(3):551-552
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