半序空间中一类非连续增算子的不动点定理

将增算子A写成∑mi=1CiBi形式,讨论了此种类型算子在半序空间X中的不动点定理.通过对半序拓扑空间Yi中的相对紧性的讨论,并利用半序方法得到了A在X中存在最大与最小不动点的结论.     

半序空间非连续增算子的不动点定理及应用

在半序空间X中证明了具A=CB型增算子的某些新的不动点定理.本文完全没有使用对算子A的连续性和对锥性质的假设.只要求第二空间是半序拓扑空间,B(D)是相对紧集,所得结果推广了近期相关结论.     

BCI-代数自然半序的几何特点

本文对BCI-代数的自然半序进行讨论,指出这种自然半序的几个几何特点:一个BCI-代数是真BCI-代数iff它没有≤下的最小元;如果b∈X—B(X),则b所在≤-半序链与B(X)不相交;由任何两个极小元素出发的半序链是不相交的。     

关于保序集值算子的讨论

讨论了半序集和半序拓扑空间中保序集值算子的最小与最大不动点的存在性．在半序集上，给出了类似于中关于序Banach空间中混合单调算子的耦合拟不动点的结果；在半序拓扑空间中，改造了中相关定理中关于算子的条件，得到算子存在最小与最大不动点。     

单调函数和单调算子叙列的收敛性

本文考虑在线性半序空间(即k空间)中取值的函数(在闭区间〔a,b〕上定义),而得到了古典定理(关于函数叙列收敛问题)的相应推广。另外,Канторович曾研究过在半序空间中的线性算子叙列的收敛问题。现在我们考虑在k线集X上定义而在k空间Y中取值的所谓单调算子(或叫保序算子,一般是非线性的);对于这种算子的叙列,我们得到了与Banach-Steinhaus定理以及Канторович的结果(参看[2],第十章,§1或[3])相类似的某些结果。同时我们也给出了应用的例子。 本文所用的名词和记号,请参看文献[2]。     

C—空间中半T_ii=(0,1,2,3,)的遗传性

文[2]中讨论了半分离性对于开子空间的遗传性,本文将证明,如果空间是C——空间则半分离性对于半开子空间也是可遗传的.定义1 如果拓扑空间X的子空间Y∈S.o(X),则称Y为X的半开子空间.命题1 若X是c——空间,Y是X的半开子空间,则     

k-集压缩映象的耦合不动点定理

本文在半序Banach空间中(导出半序的锥是一般的)得出了k-集压缩映象的耦合不动点定理,改进和推广了文[Dajun(1987)]的一些相应结果.     

半序空间混合单调算子的耦合不动点定理及其应用

在半序空间X × X中证明了具A=CB形式的混合单调算子的耦合不动点定理和最小最大耦合不动点定理。最后将该定理应用于讨论含有不连续项的混合单调Volterra型积分方程耦合拟解的存在性。     

PN-空间中单增集类映射的不动点

在PN 空间中 ,对于集类引进半序。利用半序理论研究PN 空间中集类单增映射 ,给出了此类映射不动点定理     

关于弱J-空间的一些性质

目的　研究弱J 空间、半弱J 空间及其乘积空间和J 空间的锥空间的一些性质。方法　在前人研究J 空间的基础之上,用类比的思想以及构造新空间(乘积空间与商空间)的方法来研究与弱J 空间有关的一些性质。结果　得到了有关弱J 空间和半弱J 空间的一些等价命题及乘积性质,也得到了J 空间的锥空间的性质。结论　①设{X1,X2,K}是空间X的闭覆盖并且满足K紧,X1∩X2= ,则X是弱J 空间当且仅当X1和X2是弱J 空间,且X1或X2紧;②判断乘积空间X1×X2是弱J 空间的一些充分必要条件;③如果X是连通的J 空间,那么Δ(X)是半弱J 空间。     

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.     

Features of Women's language

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

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-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the