Let E and F be Banach lattices. It is known that if every continuous linear operator from E into F is regular, then, under some mild assumptions on E or F, either E is lattice isomorphic to an AL-space or F is lattice...Let E and F be Banach lattices. It is known that if every continuous linear operator from E into F is regular, then, under some mild assumptions on E or F, either E is lattice isomorphic to an AL-space or F is lattice isomorphic to an AM-space. Here we present a characterization on an AL-space E such that every bounded linear operator from E into a Banach lattice is regular. A counterexample is also provided, which shows that the results are unexpected even if the domain is an AL-space or the range space is an AM-space.展开更多
In this paper, we show that if V0 is an isometric mapping from the unit sphere of an AL-space onto the unit sphere of a Banach space E, then V0 can be extended to a linear isometry defined on the whole space.
胶结充填体作为人工矿柱常受到邻近矿房开采的爆破扰动,严重影响其稳定性。基于KCC(Karagozian and Case Concrete)本构模型和ALE(Arbitrary Lagrangian-Eulerian)流固耦合算法,采用LS-DYNA软件开展胶结充填体受邻近矿房爆破扰动的数值...胶结充填体作为人工矿柱常受到邻近矿房开采的爆破扰动,严重影响其稳定性。基于KCC(Karagozian and Case Concrete)本构模型和ALE(Arbitrary Lagrangian-Eulerian)流固耦合算法,采用LS-DYNA软件开展胶结充填体受邻近矿房爆破扰动的数值模拟研究,考虑不同边孔间距(0.6、1.2、1.8、2.4 m)及养护龄期(14、21、28 d)影响,揭示充填体中爆破波传播规律,探究爆破扰动对胶结充填体的动力响应及其失稳破坏情况。结果表明:邻近采场爆破对胶结充填体的破坏损伤主要集中在边界处,为提高矿石回收率并保证充填体安全,建议采用边孔间距1.2 m方案;矿山爆破开采中充填体至少需要养护21 d;低龄期充填体矿柱顶底部区域是整个矿柱中的薄弱部分,易发生失稳,应予以重点监测。展开更多
目的探讨我国城乡二元结构下卫生资源配置的空间分布模式和特征,为今后我国卫生资源配置的规划决策提供参考。方法应用ArcGIS10.0软件,运用Moran's Ⅰ空间自相关分析和Getis-Ord General G热点分析从地理空间角度研究我国卫生资源...目的探讨我国城乡二元结构下卫生资源配置的空间分布模式和特征,为今后我国卫生资源配置的规划决策提供参考。方法应用ArcGIS10.0软件,运用Moran's Ⅰ空间自相关分析和Getis-Ord General G热点分析从地理空间角度研究我国卫生资源人力、物力、财力三方面的分布特点。结果我国卫生资源配置总体上呈现由北向南逐渐减少,由东向西先减少后增加的趋势;Moran's Ⅰ空间自相关分析和Getis-Ord General G热点分析显示我国城乡卫生资源人力、物力、财力整体上呈明显空间正相关;城乡卫生资源存在不平衡现象。结论我国卫生资源的配置具有明显的地域分布规律,空间分析技术可为卫生资源配置合理性的研究提供线索。展开更多
文摘Let E and F be Banach lattices. It is known that if every continuous linear operator from E into F is regular, then, under some mild assumptions on E or F, either E is lattice isomorphic to an AL-space or F is lattice isomorphic to an AM-space. Here we present a characterization on an AL-space E such that every bounded linear operator from E into a Banach lattice is regular. A counterexample is also provided, which shows that the results are unexpected even if the domain is an AL-space or the range space is an AM-space.
基金the Research Foundation for Doctor Programme (Grant No. 20060055010) the National Natural Science Foundation of China (Grant No. 10571090)
文摘In this paper, we show that if V0 is an isometric mapping from the unit sphere of an AL-space onto the unit sphere of a Banach space E, then V0 can be extended to a linear isometry defined on the whole space.
文摘胶结充填体作为人工矿柱常受到邻近矿房开采的爆破扰动,严重影响其稳定性。基于KCC(Karagozian and Case Concrete)本构模型和ALE(Arbitrary Lagrangian-Eulerian)流固耦合算法,采用LS-DYNA软件开展胶结充填体受邻近矿房爆破扰动的数值模拟研究,考虑不同边孔间距(0.6、1.2、1.8、2.4 m)及养护龄期(14、21、28 d)影响,揭示充填体中爆破波传播规律,探究爆破扰动对胶结充填体的动力响应及其失稳破坏情况。结果表明:邻近采场爆破对胶结充填体的破坏损伤主要集中在边界处,为提高矿石回收率并保证充填体安全,建议采用边孔间距1.2 m方案;矿山爆破开采中充填体至少需要养护21 d;低龄期充填体矿柱顶底部区域是整个矿柱中的薄弱部分,易发生失稳,应予以重点监测。
文摘目的探讨我国城乡二元结构下卫生资源配置的空间分布模式和特征,为今后我国卫生资源配置的规划决策提供参考。方法应用ArcGIS10.0软件,运用Moran's Ⅰ空间自相关分析和Getis-Ord General G热点分析从地理空间角度研究我国卫生资源人力、物力、财力三方面的分布特点。结果我国卫生资源配置总体上呈现由北向南逐渐减少,由东向西先减少后增加的趋势;Moran's Ⅰ空间自相关分析和Getis-Ord General G热点分析显示我国城乡卫生资源人力、物力、财力整体上呈明显空间正相关;城乡卫生资源存在不平衡现象。结论我国卫生资源的配置具有明显的地域分布规律,空间分析技术可为卫生资源配置合理性的研究提供线索。
