NQD样本下一般形式的密度估计

两两NQD列是一类非常广泛的列,文章利用两两NQD序列的矩不等式,讨论了当d=1时,基于同分布两两NQD样本的一般形式的密度估计,得到了一维同分布两两NQD样本下一般形式密度估计的强相合性、矩相合性.     

关于两两NQD序列的强大数定律

两两NQD序列的研究已有数十年,根据吴群英对两两NQD序列收敛性质,利用Kronecker引理和三级数定理证明了一个更一般性的收敛定理,并加以推广应用,得到两个相关推论,从而推广了两两NQD序列的强大数定律．     

两两NQD序列部分和之和的强大数定律

主要研究了两两NQD序列部分和之和的强大数定律,并凶此得到两两NQD序列部分和之和的强收敛性.在较弱的条件下得到了与独立列部分和之和相类似的结果.同时给出了两两NQD序列部分和之和的强大数定律的一种描述.     

两两NQD样本下非参数回归函数一般权估计的相合性

两两NQD序列是一类非常广泛的列,文章利用两两NQD序列的矩不等式,讨论了基于同分布两两NQD样本的非参数回归函数一般权函数的估计,得到了两两NQD样本下固定设计非参数回归函数一般权估计的相合性.     

两两NQD列的一个强大数律

利用随机变量的截尾方法和两两NQD序列的三级数定理,得到了矩条件下两两NQD序列的一类强大数定律,推广了若干已有的强大数律。     

NQD样本最近邻密度估计的一致强相合速度

设X1,X2,…,Xn是同分布的两两NQD样本,具有相同的密度函数f（x）,利用两两NQD序列的Bernstein型不等式,将负相关（NA）样本的最近邻密度估计的一致强相合速度推广到两两NQD样本,在更弱的条件下,获得了与NA样本情形下相同的结论.     

两两NQD序列完全矩收敛的精确渐近性

设{X_n, n≥1}为同分布的两两NQD(negatively quadrant dependent)序列, 均值为0. 在适当的条件下, 利用两两NQD序列的中心极限定理和矩不等式等工具, 给出两两NQD序列部分和一般对数律下完全矩收敛精确渐近性的一般函数式.     

两两NQD序列完全矩收敛的精确渐近性

设{X_n, n≥1}为同分布的两两NQD(negatively quadrant dependent)序列, 均值为0. 在适当的条件下, 利用两两NQD序列的中心极限定理和矩不等式等工具, 给出两两NQD序列部分和一般对数律下完全矩收敛精确渐近性的一般函数式.     

两两NQD列的收敛定理

讨论了两两NQD列的收敛性质,独立情形的强大数定律得到推广．在推广的三级数定理的基础上,获得了判别两两NQD列收敛的一些新的结果．     

NQD样本下密度函数核估计的相合性

设{Xn,n≥1}为同分布的两两NQD随机变量序列,f(x)为其概率密度函数,基于样本X1,X2,…,Xn, 文章对密度函数f(x)的核估计进行了讨论, 在适当条件下证明了强相合、一致强相合和均方相合.     

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     

Call for Papers

<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