共查询到20条相似文献,搜索用时 62 毫秒
1.
引入新算子Lp(n,c)研究函数类L(a,c;a)的一些性质,并给出在Sp^b(a)和L(n,c;a)中的星象函数卷积算子条件下的一些充分必要条件. 相似文献
2.
范九伦 《陕西师范大学学报(自然科学版)》1994,(2)
引入I(L)型诱导一致结构,证明了当一致结构(LX,D)是一致生成时,I(L)X上的诱导一致结构(I(L)X,(D))诱导的I(L)X上的拓扑是弱诱导的. 相似文献
3.
用一种不于同于文献[2]的方法证明了LF实直线的连通性。这种方法直观易懂,而且对LF单位区间I(L)也适用。 相似文献
4.
关于L-Fuzzy半开集的一点注记 总被引:6,自引:4,他引:2
针对LF半开集(我们称其为LF-r半开集)作了进一步的研究,得出通常的LF半开集与LF-r半开集互不蕴含及在满层的LF拓扑空间中,LF半开集是LF-弱r半开集等结果。 相似文献
5.
本文在点式Fuzzy映射及其扩张定理基础上,讨论了在一般完备格L上的点式LF映射,得到了重要的定理2.2及其它性质,最后将点式LF映射扩张成集式映射. 相似文献
6.
吴春 《重庆师范学院学报》2014,(5):76-80
主要研究了亚纯函数分担全纯函数的正规族问题,证明了:如果扩是区域D上的亚纯函数族,且满足L[f]=a0f'+a1f(a0≠O),a,b,c,d为D上的4个全纯函数。如果对任意的f∈£只满足a(z)≠d(z),b(z)+a1(z)a(z)+a0(z)a’(z)≠2c(z),c(z)-a0(z)a’(z)一a1(z)a(z)≠0,f(z)=a(z)→L[f](z)一b(z)且L[f](z)=c(z)→f(z)=d(z),则£在D正规。 相似文献
7.
汪红 《四川师范大学学报(自然科学版)》2004,27(6):597-598
首先引入L上基本模糊点的概念,以此为基础给出了LF集的定义,并得到(F(X),≤)是完备格和(F(X),≤,∨,∧)是完全分配格等重要结论及分解定理。 相似文献
8.
研究了两类特殊三阶矩阵环的左Morphic性质.具体地,设R是环,令L(R)=a11 0 0a21 a22 a230 0 a33|a11,a21,a22,a23,a33∈R和O(R)=a 0 0a21 a a230 0a|a,a21,a23∈R.证得:(1)L(R)和O(R)都不是左Morphic的;(2)当R是唯一Morphic环且R∝R是左Morphic的,O(R)中主对角线为非零元的元素是左Morphic元. 相似文献
9.
本文推导了3d4/3d6离子在D4h对称下5D、3L(L=P,D,F,G,H)和1L(L=S,D,F,G,H)态的哈密顿矩阵元,其中包括晶场、自旋-轨道、自旋-自旋相互作用及Trees’修正.基于这个矩阵,利用完全对角化方法,研究了K2FeF4中Fe2+离子的EPR零场分裂参量D,a,F,所得结果与实验符合很好.将本文结某与以前研究比较证明晶体中Fe2+的低自旋态(3L和1L)对零场分裂的贡献是重要的,尤其对四阶零场分裂参量a和F.进一步研究是必要的。 相似文献
10.
研究了在有界区间(0,L)上一维非线性波动方程的渐进性,当阻尼函数a(x)在有界区间(0,L)∩→R^1上可以变号并且满足a=1/L∫0^la(x)dx〉0时,证明了方程在以下两种情况下能够指数衰减:(i)a∈L^*。并且非线性函数f满足整体Lipschitz连续;(ii)|a-a^-|L∞充分小,以及函数,满足增长性条件. 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.
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.
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
14.
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
15.
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
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.
Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
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
18.
Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
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
19.
Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
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
20.
《上海师范大学学报(自然科学版)》2014,(5):550
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with 相似文献