关于半范数在有限维向量空间的几个重要结论

在向量空间上由半范数定义了一个拓扑,在有限维向量空间中,把范数的一些重要结论扩展到半范数,研究了半范数在它导出的拓扑空间上等价性的判定,以及连续性等重要结论,并给出了简化证明．     

半范数的泛函表示及应用

给出了局部凸空间上连续半范数，有界半范数和下半连续半范数等的泛函表示，应用这些表示定理，我们得到了Ｂａｎａｃｈ－Ｍａｃｋｅｙ空间的一个全局特征和囿空间的对偶特征，最后还给出了局部凸空间理论中一些重要定理的简化证明。设Ｘ是Ｈａｕｓｄｏｒｆｆ局部凸空间，Ｘ′为Ｘ上的连续线性泛函全体，Ｘ￣ｂ是Ｘ上的有界线性泛函全体，则有定理１（３）ｐ：Ｘ→Ｒ是连续（下半连续）半范数当且仅当存在Ｘ′的等度连续（σ（Ｘ′，Ｘ）有界）子集Ｂ使得对任何ｘ∈Ｘ都有定理４Ｘ是Ｂａｎａｃｈ－Ｍａｃｋｅｙ空间当且仅当Ｘ上每个下半连续半范数都是有界的。定理５Ｘ是囿空间当且仅当Ｘ￣ｂ中的β（Ｘ￣ｂ，Ｘ）有界集都是Ｘ′中的等度连续集。     

赋范线性空间的范数序结构

在赋范线性空间中依据范数确定一类半序关系,引入赋范线性空间的范数序概念,即α≤β,是指‖α-β‖=|‖α‖-‖β‖|,且‖α‖≤‖β‖。研究赋范线性空间的序结构特征,即范数序是由零向量（最小元）出发,互不相交的全序链构成的;非零向量生成的子空间是由其中的两条链组成的;处于不同链上的向量要么线性无关,要么互为负向量。     

赋Orlicz范数的Orlicz-Lorentz空间中的特征函数的范数计算

Orlicz-Lorentz空间Λφ,ω中特征函数的Luxemburg范数已经解决,吴从忻、任丽伟给出了Orlicz-Lorentz空间的Orlicz范数,并且我们发现特征函数的Luxemburg范数和Orlicz范数在研究Orlicz空间几何性质时起着非常重要的作用,因此本文将给出Orlicz-Lorentz空间Λφ,ω中特征函数的Orlicz范数的计算公式.     

广义Orlicz范数和广义Luxemburg范数

在Orlicz空间引进了两个与Orlicz范数和Luxemburg范数等价的新范数广义Orlicz范数和广义Lux-emburg范数,并给出了广义Orlicz范数的另一种形式.     

Bergman空间上复合算子的范数与本性范数

用D表示单位圆盘, $A^p(D)$表示D上的Bergman空间. 设$\varphi$是$D$上的解析自映射. 定义复合算子$C_\varphi$: $ (C_\varphi f)(z)=f(\varphi(z)). $ 研究了$A^p(D)$上复合算子的 KSP 性质. 同时,计算了D上Bergman空间上一些复合算子的范数与本性范数. (C_\varphi f)(z)=f(\varphi(z)) . $ 作者研究了$A^p(D)$上复合算子的 KSP 性质. 同时, 作者还计算了$D$上Bergman空间上一些复合算子的范数与本性范数.     

L1-范数子空间技术的鲁棒建模综述

子空间学习可以通过多种技术来开展,对一些流行且被广泛使用的子空间学习方法,简要回顾其基于L1-范数的鲁棒建模.从主成分分析开始介绍子空间学习技术、线性判别分析以及更一般的图嵌入框架.作为L1-范数的综合利用,进一步讨论具有稀疏性的鲁棒建模.此外,还论述一些应用在神经科学中的相关子空间学习技术.最后,针对基于L1-范数的子空间学习的求解问题,介绍一个有力工具,即边界优化技术.     

空间Lp（μ,X）范数的粗性

本文对空间Lp(μ,X)的范数的粗性进行了讨论,证明了由空间X的范数是粗的可以推出空间Lp(μ,X)的范数也是粗的.     

S—凸性与局部S—凸空间

<正> 在一个向量空间上,如果定义了一族可分离的半范数,则这族半范数可将此向量空间装备为一个局部凸空间。然而,有些向量拓扑空间,甚至是向量度量空间,诱导出其上拓扑的,并非半范数。例如在向量空间L~s[0,1](0相似文献   

广义模糊p-伪范数与局部半凸I-拓扑向量空间

给出局部半凸I-拓扑向量空间的一个新定义,并重新命名"局部半凸模糊拓扑线性空间"为"(QL)-型局部半凸I-拓扑向量空间",研究这两种定义之间的关系,引入广义模糊p-伪范数的概念,证明每个局部半凸I-拓扑向量空间可通过一族广义模糊p-伪范数来刻画.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with