扭立方连接网络的故障诊断分析

容错性对于互联网络来说极为重要,这是因为网络规模的扩大会导致一些元器件的脆弱性.为维持多处理机系统的高可靠性能有必要将故障处理机识别和替换下来,这一过程通常称为故障诊断分析.通过对扭立方连接网络TN n的容错性分析,确定了其在PMC诊断模型下的条件诊断度,并给出简易的t/t-诊断算法.     

一类二阶时滞微分方程多重周期解

利用变分原理和Z2不变群指标对一类二阶时滞微分方程（a（t）x′（t-τ））′-b（t）x（t-）τ＋fλ（t,x（t）,x（t-）τ,x（t-2）τ）=0的周期解问题进行研究,得出在一些条件下方程有2n个周期为2π的非平凡周期解。     

一类时滞微分方程正解的存在性

研究一类一阶非线性时滞微分方程，x′（t）＋a（r）f（x（t））＋p（t）g（x（t））h（x（t-τ1（t）），x（t-τ2（t）），…，x（t-τn（t）））=0，其中，a,p，τj∈C（R^＋，R^＋），limt→＋∞（t-τ1（t））=＋∞，j=1，2，…，n，f，g∈C（R，R），获得了其存在正解的充分条件。     

折叠超立方体网络的t/k诊断问题

为提高系统故障诊断的诊断度,Somani 和Peleg提出了t/k诊断故障策略. n维折叠超立方体网络是具有2n个顶点,(n+1)2n-1条边的(n+1)-维正则图,它是n维超立方体网络增加2n-1补边得到的.中证明了当n≥6和1≤k≤n+1时n维超立方体网络是t/k可诊断的,其中t=(k+1)(n+1)-1/2(k+1)(k+2)+1.     

含n个滞量的微分差分方程周期解的存在性

通过构造多元函数,定性分析一个耦合自治常微分方程组周期解的存在性,研究含多个滞量的微分差分方程x′（t）=F（x（t）,x（t-τ1）,x（t-τ2）,...,x（t-τn））和x′（t）=F（x（t）,x（t-τ）,x（t-2τ）,…,x（t-nτ））周期解的存在性问题,获得系统存在非平凡振动周期解的一组充分条件,推广和改进了文献[3～5]的结果.     

一类中立型Duffing方程的周期解

研究带有时滞的Duffiang型方程ax″（t）＋bx＇（t）＋cx（t）＋g（t-τ1,x＇（t-τ2）,x″（t-τ3））=p（t）=p（t＋2τ）利用Brouwer度等理研究了上述方程2τ周期的存在条件．     

一类高阶微分方程周期解的存在性

考虑一类高阶微分方程ax^（2n）（t）＋cx’（t）＋bx（t）＋g[x（t-τ）]=p（t）,利用重合度理论,获得了此类方程至少存在一个T-周期解的充分条件。     

无限系统的动力学关联函数

复杂多体系统通常可以看作是一个系统和热浴相互耦合作用构成的体系.从郎之万方程的推导出发,可以得出线性耦合情况下热浴的关联函数为〈F（t）·F（τ）〉=kT∑j（（λj^2）/（mjωj~2））cosωj（t-τ）.线性耦合情况下系统的郎之万方程为P（t）＋（δHS（m）/δQ）＋λ^2 integral from n=0 to t（dτK（t-τ）·P（τ）=λF（t））     

一类二阶时滞微分方程的周期解存在性

本考虑二阶时滞微分方程x〃（t） ax'(t) bx(t) g(x(t-Υ1),x'(t-Υ2))=p（t)利用拓扑度和重合度理论得到了此方程至少存在一个2π周期解的充分条件。     

一阶非线性中立型时滞微分方程的非振动解

利用Banach压缩映象原理,研究下列一阶非线性中立型时滞微分方程d/（dt）[x（t）]＋c（t）x（t-τ1）＋d（t）x（t-τ2）]＋h（t）f（t,x（t-σ1（t））,x（t-σ2（t））,…,x（t-σk（t）））=g（t）的非振动解的存在性,并获得了相应非振动解的迭代逼近序列.     

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