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1.
该文考虑了基于为n次Jacobi多项式)零点的扩充Grunwald插值算子,主要证明了扩充Grunwald插值算子在(-1,1)上内闭一致逼近连续函数且不可能在整个闭区间[-1,1]上一致逼近连续函数,并进一步表明扩充Grunwald插值算子在L1范数意义下收敛于连续函数。  相似文献   

2.
J.A.Goldstein讨论了线性半群与cosine算子的关系,导出了cosine算子用半群表示的积分关系.该文利用屈超纯所提出变型算子方法,在抽象正则函数类定义变型算子,导出cosine算子用半群的积分表示式  相似文献   

3.
利用Glazman,Lidskii方法研究了单项非自伴微分算子(J-自伴微分算子)的谱,得到这类J-自伴微分算子谱是离散谱的充分条件,推广了实系数的单项自伴微分算子的结论。  相似文献   

4.
说明G.Soderlind所引入的glb-Dahlquist数从本质上刻画了非线性算子的增生性.利用这一结果,将在一致平滑Banach空间中熟知的Lipschitz连续的一致增生算子与压缩算子的基本联系推广至任意Banach空间.另外,还将稳定矩阵理论的2个基本定理推广至非线性情形  相似文献   

5.
具有可积系数J-对称微分算子的亏指数   总被引:3,自引:2,他引:1  
利用分析方法研究了具有可积系数的2n阶非对称微分算子,得到几类极限点型的非对称微分算子(J-对称微分算子),同时也给出了这几类J-对称微分算子的亏指数.  相似文献   

6.
讨论了连续函数空间C(Ω)上的Bartle积分算子与其表示测度之间的关系,证明了只要μ是非负Borel测度,包含映射J:C(Ω)→L1(μ)就是绝对可和算子,同时也是Pietsch积分算子,且‖J‖as=‖J‖pint=μ(Ω)。而μ的正则性保证了由G(E)=XE定义的向量测度G是J的表示测度。  相似文献   

7.
李世荣 《广西科学》1994,1(1):7-9,12
令G是一个有限群,P是一个固定奇素数.M<G表示M是G的真子群.记J2(G)=(M:M<G,|G:M|非素数幂,且|G:M|,=1}.本文讨论当J2(G)的元皆为幂零群时G的结构.  相似文献   

8.
Banach空间中非线性互补问题的解的存在性   总被引:1,自引:0,他引:1  
证明了一个非线性互补问题NCP(T,K)的解的存在定理、其中,K是自反Banach空间E中的闭弱局部紧凸锥、T是从KE到E中的非线性算子;另一方面,证明了当KE是一个Galerkin锥,T具有形式T=J-F时的问题NCP(T,K)的解的存在定理.其中,J是对偶映像,F满足适当的附加条件.  相似文献   

9.
本文证明了强素根是Г-环的特殊遗传根,若R是Г─环M的右算子环且左duo,则S(M)=S(R)*',.强JacobsonГ─环定义为其所有同态象的素根与强素根一致,建立了Г─环M、矩阵Г_(n,m)─环M_(m,n)及M的右算子环的强Jacobson性质之间的关系。  相似文献   

10.
利用复数群代数CG和伽罗华环GR(8m)的划分,得到线性八进制码的完全陪集重量算子和其对偶码的完全重量算子之间的关系式.进一步,GR(8m)的规则划分决定一个交换结合图.图的特征矩阵可由对偶码的完全重量算子计算出来,若已知对偶码的完全重量算子,可计算出线性码的完全陪集重量算子.  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

15.
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。  相似文献   

16.
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.  相似文献   

17.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

18.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

19.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

20.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

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