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浅谈地质图件投影及其在MAPGIS下投影变换方法 被引量:1
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作者 商培林 《华北国土资源》 2012年第5期78-83,86,共7页
地质勘查工作中各类图件常常需要进行地图投影,尤其经年来电子图件的制作已经普及,如果不进行地图投影将无法使用,地图投影已成为图件成图的必然要求。笔者对地图投影的概念、分类、地质工作中常用的投影类型及MAPGIS软件下的投影变换... 地质勘查工作中各类图件常常需要进行地图投影,尤其经年来电子图件的制作已经普及,如果不进行地图投影将无法使用,地图投影已成为图件成图的必然要求。笔者对地图投影的概念、分类、地质工作中常用的投影类型及MAPGIS软件下的投影变换方法进行了阐述。 展开更多
关键词 地质图件 投影类型 MAPGIS 投影变换方法
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Gorenstein Q-homology projective planes 被引量:1
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作者 HWANG DongSeon KEUM JongHae OHASHI Hisanori 《Science China Mathematics》 SCIE CSCD 2015年第3期501-512,共12页
We present the complete list of all singularity types on Gorenstein Q-homology projective planes,i.e.,normal projective surfaces of second Betti number one with at worst rational double points.The list consists of 58 ... We present the complete list of all singularity types on Gorenstein Q-homology projective planes,i.e.,normal projective surfaces of second Betti number one with at worst rational double points.The list consists of 58 possible singularity types,each except two types supported by an example. 展开更多
关键词 Q-homology projective plane Enriques surface rational double point
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Carleson Type Measures for Harmonic Mixed Norm Spaces with Application to Toeplitz Operators
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作者 Zhangjian HU Xiaofen LV 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2013年第4期623-638,共16页
Let Ω be a bounded domain in Rnwith a smooth boundary, and let h p,q be the space of all harmonic functions with a finite mixed norm. The authors first obtain an equivalent norm on h p,q, with which the definition of... Let Ω be a bounded domain in Rnwith a smooth boundary, and let h p,q be the space of all harmonic functions with a finite mixed norm. The authors first obtain an equivalent norm on h p,q, with which the definition of Carleson type measures for h p,q is obtained. And also, the authors obtain the boundedness of the Bergman projection on h p,q which turns out the dual space of h p,q. As an application, the authors characterize the boundedness(and compactness) of Toeplitz operators T μ on h p,q for those positive finite Borel measures μ. 展开更多
关键词 Carleson type measure Harmonic mixed norm space Toeplitz operator Bergman projection
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