多元正态总体期望和协方差同时检验的问题

讨论了q个多元正态总体中关于统计假设H0：μ1=μ2=…=μq=μ0,∑1=∑2=…=∑q=σ^2I,的检验问题,并以X^2-分布为基础的级数形式给出了似然比检验统计量的零分布及在与原假设相接近的某些备择假设下非零分布的一个渐近展开式．     

复多元正态总体球性检验似然比准则的精确分布

讨论了r个复多元正态总体中检验假设H:μ1=μ2=…=μr=μ0;∑1=∑2=…=∑r=σ^2I的检验问题，以最一般的形式给出了用含有H－函数的级数表示的修改似然比统计量的非零精确分布。     

多元正态总体中球性检验的单调性问题

设Xj1,Xj2,…,XjNj(j=1,2,…,q)为从q个p维实正态总体Npθj,12Σj抽取的一个随机子样,原假设为H:Σ1=Σ2=…=Σq=σ2Ip(其中σ2>0未知,Ip为P阶单位矩阵).文章证明了修改似然比检验的势函数仅与Σj(j=1,2,…,q)的特征根有关,并给出了其势函数的单调性结论.     

Dirichlet L-函数的二次加权均值分布

利用三角和估计、特征和估计等解析方法研究Dirichlet L-函数的二次加权均值分布，得出均值分布的渐近公式∑x≠x0|G(m,x)|^2|L(1,x)|^2=π^2/6φ^2(q)∏p|q(1-1/p^2) O(q^3/2ln^2qd(q)).     

第Ⅳ种四态叠加多模叠加态光场的等幂次N次方Y压缩

构造的第Ⅳ种四态叠加多模叠加态光场│ψ0^（4），Ⅳ〉q是由多模复共轭奇相干态│ψ0^（2），O〉q和多模虚奇相干态│ψ0^（2），O〉q这两者的线性叠加所组成的。利用新近建立的多模压缩态理论，对态│ψ0^（4），Ⅳ〉q的广义非线性等幂次N次方Y压缩特性进行了详细研究。结果发现：1）当压缩次数N为偶数，且N=4m（m=1，2，3，…）时，若各模的初始相位φi，态间的初始相位差θ1-θ2等分别满足一定的取值条件，态│ψ0^（4），Ⅳ〉q的第一正交相位分量总可呈现出等幂次N次方Y压缩效应；2）当压缩次数N为偶数，且N=4m-2（m=1，2，3，…）时，若各模的初始相位φi，态间的初始相位差θ1-θ2等分别满足一定取值条件，态│ψ0^（4），Ⅳ〉q的第二正交相位分量总可呈现出等幂次N次方Y压缩效应。     

关于独立随机变量列部分和乘积的一个极限定理

讨论了一类独立非负随机变量列部分和乘积的渐进结构，在一定条件下给出了一个中心极限定理。假设X1,X2…，Xa,…为二阶矩存在的非负独立随机变量列，证明收敛性[^nПk=1（Sk/μk）^1/γk]^1/√Tnd→e√2N成立，其中N是标准正态随机变量，Sk=^k∑i=1Xi,μk=E（Sk）,σk=Var（Sk），γk=σk/μk，且Tn=^n∑k=1k/σk.     

Uq（Sp（2n））-模同构R= οf^-οP中 的简化

给出了Uq（Sp（2n））-模同构R= οf^-οP中 的一个简化表达式 ′,即 ′=1×1＋∑ht（μ）≥2 μ≠τ（μ）（q^-1-q）Fμ ×Eτ（μ）＋∑ht（μ）≥1（-1）^ht（μ）（1 -q^-2）qμFμ×Eμ＋∑μ=τ（μ）^μ≥α1（q^-2-1）（1 ＋qμ）Fμ×Eμ.     

基于Ⅱ型截尾样本下Rayleigh分布参数的条件置信限

Rayleigh分布是很重要的寿命分布 ,单参数Rayleigh分布的参数推断问题在一些文献中已有讨论 .本文假设寿命X服从双参数Rayleigh分布 ,即X有密度　　f(x ;μ ,σ) =2 (x - μ)σ e(x- μ) 2σ 　　x>μ ;-∞ <μ <∞ ;σ >0通过Ⅱ型截尾样本的前r个次序统计量 :X(1 ) ≤X(2 ) ≤…≤X(r) (r≤n) ,首先推出了枢轴量Z1=( ^μ - μ) 　^σ,Z2 =^σ σ建立在可观测的辅助统计量a =(a1 ,a2 ,… ,ar) (ai=(X(i) - ^μ)　^σ;μ ,^σ分别为参数 μ ,σ的极大似然估计 )基础上的条件分布 ,据此得到了参数 μ ,σ的条件置信限 (置信区间 ) ,最后 ,给出了p分位点xp 的置信区间和Rayleigh分布的容许限的计算方法 .     

生长曲线模型中参数的检验问题

讨论了生长曲线模型中关于原假设为H0:Λ=σ2I,μ=μ0的检验问题,并以2-分布为基础的级数形式给出了似然比检验统计量在以下两类与原假设相接近的备择假设下的渐近分布.K1:I-ηΛ-1=M2Ω,η-1/2(μ1-μ0)=M-1/2δ;K2:I-η-1Λ=M2Q,η-1/2(μ1-μ0)=M-1/2δ.     

En中p维与q维线性子流形之间的距离

设n维欧氏空间E^2中p维与q维线性子流形分别为：σp:α1∧α2∧…∧αk∧(x-x0)=0,σp:β1∧β2∧…∧βq∧(y-y0)=0，向量组{α1，…，αp,β1,…,βq}的一个极大线性无关组为{γ1，γ2，…,γk}，证明了σp与σq间的距离平方为α^2(σp,σq)=|δ0|^2-(γ1δ0,…，γkδ0）A^-1(γ1δ0,…,γkδ0)^T，其中δ0=x0-y0,A=(γiγj)^ki.j=1。     

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