同分布NA随机变量一类加权和的强大数律

在权阵列{ani：1≤i≤n,n≥1）满足Aα=lim sup n→∞（1/n∑i=1^n｜ani｜^α）^1/α〈∞的条件下,得到了高阶矩存在的同分布NA随机变量加权和的强大数律．     

α-弱相依序列加权和的几乎处处中心极限定理

设{Xn,n≥1}为一零均值有界的α-弱相依序列,满足∑∞i=1θi<∞;{ani,1≤i≤n,n≥1}为一实值三角阵列;令Sn,k=∑ki=1aniXi,1≤k≤n.利用随机变量加权和的弱收敛定理与Borel-Cantelli引理,在适当的假设条件下,给出了非平稳有界的α-弱相依序列加权和Sn,n的几乎处处中心极限定...     

B值随机变量一类加权和的完全收敛性

设{Xni:1≤i≤n,n≥1}为行间独立的B值r.v.阵列,X为实值r.v.,E｜X｜p<∞,p>2,且对 x>0, 1≤i≤n,n≥1,都有P(‖Xni‖>x)≤P(｜X｜>x).{ani:1≤i≤n,n≥1}为满足条件∑ni=1a2ni=1,n≥1的实数阵列.则1n1 p∑ni=1aniXnip0蕴涵1n1 p∑ni=1aniXni完全收敛于0.     

关于两两NQD阵列Jamison型加权和的收敛性

令{Xni;1≤i≤in ↑∞,n∈N}为零均值的行两两 NQD 阵列{ani;1≤i≤in ↑∞,n∈N}为正实数阵列,在两两 NQD 阵列范围内讨论其 Jamison 型加权和Sni=A-1ni∑i≤in aniXni强收敛性,丰富了已有的研究结果.     

p型Banach空间B值随机元序列加权和的收敛性

设B是实可分的p型Banach空间,{Xni,Fni;un≤i≤vn,n≥1}是B值随机元序列,{ani;un≤i≤vn,n≥1}是实数序列.研究了∑vni=unaniXni的收敛性,推广并改进了已知的结果.     

P^＊混合序列的Chover型重对数律

设{Xa,n≥1}是同分布的P^＊混合序列,其分布属于特征指数为α（0〈α〈2）的非退化稳定分布正则吸引场．利用P^＊混合序列的矩不等式证明了依概率1有lim sup n→∞（（^n∑i=1Xi）/n^1/α）^1/（log log n）=e^1/α,并获得了一系列等价条件.     

φ混合序列自正则加权和的中心极限定理

设{Xn, n≥1}为一严平稳φ混合随机变量序列, EX=0, V 2n=∑ni=1X2i, {an,i, 1≤i≤n, n≥1}为一实数阵列, Sn=∑ni=1an,iXi. 利用随机变量阵列的弱收敛定理, 在较一般的条件下, 证明了自正则加权和{Sn/Vn, n≥1}的中心极限定理, 改进并推广了已有混合序列自正则化中心极限定理的相关结果.     

Population-size-dependent branching processes in Markovian random environments

A branching model {Z n} n≥0is considered where the offspring distribution of the population's evolution is not only dependent on the population size, but also controlled by a Markovian environmental process {ξ n} n≥0. For this model, asymptotic behaviour is studied such as limn→∞Z n and limn→∞Z n/m n in the case that the mean m k, θof the offspring distribution converges to m>1 as the population size k grows to ∞. In the case that {ξ n} n≥0is an irreducible positive recurrent Markov chain, certain extinction (i.e. P(Z n=0 for some n)=1) and noncertain extinction (i.e. P(Z n=0 for some n)<1) are studied.     

关于相关数列极限的一个注记

设yn=c0 xn+c1 xn-1+…+ckxn-k,其中{xn}、{yn}是数列,k是正整数,当0≤j≤k时,存在某个j,使得k∑i=0 i≠j|ci|<|cj|成立,则limn→∞yn=A的充要条件为limn→∞xn=A/k∑i=0ci.从而推广了已有的研究成果.     

NA样本回归函数估计的强相合性

在非参数回归模型Yi=g(xi)+εi,1≤i≤n中,研究了当{εi,1≤i≤n}为一致可积的平稳NA相依序列时,未知函数g(x)的权函数估计gn(x)=∑ni=1wni(x)Yi的强相合性。     

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.     

Design and analysis of generic LBS application developing platform

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.     

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