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L_p Convergence of Generalized Fourier Series Deduced by Piecewise Linear Spectral Sequences
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作者 肖红英 《Northeastern Mathematical Journal》 CSCD 2007年第3期231-239,共9页
In the present paper, we discuss some properties of piecewise linear spectral sequences introduced by Liu and Xu. We have a study on the pointwise and almost everywhere convergence of its corresponding series. Also, i... In the present paper, we discuss some properties of piecewise linear spectral sequences introduced by Liu and Xu. We have a study on the pointwise and almost everywhere convergence of its corresponding series. Also, it is shown that the set G constructed from piecewise linear spectral sequences are bases, but not unconditional bases, for LP(0, 1) where 1 〈 p 〈 ∞, p ≠2. 展开更多
关键词 spectral sequence unconditional base
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A Characterization of Multidimensional Multi-knot Piecewise Linear Spectral Sequence and Its Applications 被引量:1
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作者 Xiao Na CUI Xu LIU +1 位作者 Rui WANG Dun Yan YAN 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2013年第9期1679-1690,共12页
We characterize a class of piecewise linear spectral sequences. Associated with the spectral sequence, we construct an orthonormal exponential bases for L2([0,1)d), which are called generalized Fourier bases. Moreo... We characterize a class of piecewise linear spectral sequences. Associated with the spectral sequence, we construct an orthonormal exponential bases for L2([0,1)d), which are called generalized Fourier bases. Moreover, we investigate the convergence of Bochner-Riesz means of the generalized Fourier series. 展开更多
关键词 spectral sequences orthonormal exponential bases convergence analysis Bochner-Riesz means
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算子的谱界与半群的增长阶相等的一个充分条件
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作者 于乃润 《西北纺织工学院学报》 1992年第2期51-53,共3页
本文给出了S(A)=W_0的一个充分条件。
关键词 算子半群 谱界 增长阶 弹性振动系统
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鄂尔多斯盆地桥沟湾地区上三叠统延长组层序格架内储层发育规律 被引量:1
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作者 潘杨辉 魏钦廉 +1 位作者 王宝 肖玲 《科技导报》 CAS CSCD 北大核心 2013年第35期33-38,共6页
应用高分辨率层序地层学理论、测井小波分析及频谱分析方法。对延长组层序地层单元进行定量识别,共识别出5个长期、21~25个中期基准面旋回层序。通过层序格架内储层发育规律分析,认为可容空间与沉积物供应量的比值(A/S)及层序界面... 应用高分辨率层序地层学理论、测井小波分析及频谱分析方法。对延长组层序地层单元进行定量识别,共识别出5个长期、21~25个中期基准面旋回层序。通过层序格架内储层发育规律分析,认为可容空间与沉积物供应量的比值(A/S)及层序界面对储层的空间展布和物性变化具有明显的控制作用,最有利的储层发育位置出现在长期基准面上升早期和下降晚期,特别是中期和长期两个级次基准面相互重叠的界面两侧,酸性孔隙流体沿着界面运移,有利于形成次生孔隙,对改善储集层储集性能有利。与传统层序地层方法相比。该方法能消除人工划分层序的不确定因素,提高旋回划分、对比的精度和准确性,提高油气勘探成功率。 展开更多
关键词 层序格架 基准面旋回 频谱分析 层序界面 延长组
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