自同构群阶为8p_1p_2···p_r的有限幂零群

给出自同构群阶为8p1p2...pr(p1,p2,...,pr是不同的奇素数)的有限幂零群的完全分类.     

Lagrange插补多项式的Bernstein求和

本文研究了在结点系{z_k~(n)=e~(((2k-1)/n)ni)}_(k=1)~n 上关于函数类 A 的 Lagrange 插补多项式的白恩斯坦—罗格辛斯基求和 U_n(f,z)=1/2{Ln(f,ze~(((s)/n)i)+Ln(f,ze~((-(s)/n)i)}在单位闭圆上的发散性与内闭一致收敛性。     

无平方因子奇数DCS的一个必要条件

设A=｛as(ms):s=1, ,k｝为无平方因子奇数不同模覆盖系,设模的最小公倍数N=［m1,m2, ,mk］=p1p2 pn,其中p1相似文献   

自然数数码的加法性质（Ⅰ）

研究了数码等幂和，指出了当记Ａ1(n,m)为n的数码m次方之和，Ａs 1(n,m)=A1(As(n,m)m)(s≥１，若k≥2,ni 1=A1(ni,m)i=1,……，k-1,n1=A1(nk,m)，则称n1,n2,……,nk为一组m-可交往循环数，证明了３个结论：（１）给定n,m序列{As(n,m)}中的数值仅有限个不同。（２）给定m，两组m－可交往循环数或者集合相等或者集合不相交。（３）给定m,m-可交往循环数仅有有限组，给出了求全部m-可交往循环数的算法，并利用计算机获得了m=3,4,5,6时的全部m-可交往循环数，最后，还提出了２个猜想。     

自同构群阶为16p1p2…pr的有限幂零群

设G是有限群,Aut(G)表示群G的自同构群的阶。本文给出了满足Aut(G)=16p1p2…pr(p1,p2,…,pr是不同的奇素数)的有限幂零群的完全分类,推广了相关文献的一些结果。     

相对二次扩张的分歧性与实二次域的基本单位（英文）

设F=Q(d)为实二次域,ε=x+yd为F的基本单位,并且ε满足NF/Q(ε)=1.建立起二次扩张F(ε)/F的二进素理想的分歧性质和x,y的同余性质之间的联系.并在d=p1…pr或2p1…pr的情形下,给出x,y的一些同余性质,其中,p1,…,pr为模4余1的不同素数.     

统计量Χ^2 D及其概率性质

众所周知，在数据分析的拟台优度检验中，检验一总体是否服从某一有限的离散概率分布时，通常使用英国统计学家K.Pearson所引入的Χ^2统计量：Χ^2=∑i-tλi(ni/n-pi)^2，其中λ=n／pi,n1 … nr=n,p1 … pr本文分析K．Pearsor Χ^2统计量的构造源渊，指出其弊端，并引入了结构上更合理的检验用统计量Χ^2 D，研究了它的均值，方差及渐近分布．     

独立模糊随机变量的强大数律

设{xn,n≥1}是一模糊随机变量序列且{an,n≥1}是一列常数,且满足0相似文献   

不相交覆盖系统中的陪集数

给出了一个阶数为pr的群G,如果存在一个不相交的覆盖系a1G1,a2G2,…,akGk,那么k=1+f([G:k∩i=1Gi]).     

Borel-Cantelli 引理的一个相关结果

由Borel-Cantelli引理知:若∑∞n=1p(An)=∞,则p(An:i.o.)=1或p(∑∞n=1IAn=∞)=1.得到比上述引理更精确的结果:设{An}是相互独立的随机事件序列,若∑∞n=1p(An)=∞,则有∑ni=1IAi/∑ni=1p(Ai)→1a.s.(n→∞)     

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