k补子字自由的无限字

设w是{0,1}上一个无限字,若x是w的子字,且|x|≥k(k为正整数),则x的补字x-不是w的子字,那么称w是一个k补子字自由的无限字.文章给出了k补子字自由无限字的若干刻画.     

k补子字自由的无限字

设w是{0,1}上一个无限字,若x是w的子字,且|x|≥k(k为正整数),则x的补字x不是w的子字,那么称w是一个k补子字自由的无限字.文章给出了k补子字自由无限字的若干刻画.     

补子字自由的无限字

研究满足下列条件的无限字w:如果x是w的子字,并且|x|至少取k(k是某个固定正整数),那么x的补字不是w的子字.给出了k≤4时所有这种无限字.     

关于弱自避免字的注记

文章将给出两个元素字母表上的极大弱自避免字的完整刻画,同时给出三个元素字母表Σ3上,满足条件:x1[1]=2,2-1x1∈Σ2ω的无限弱自避免字x1=20012010150130111017012301150…,其中(20)-1x1中0的位置由序列fn决定:f2n 1=52n-2(n≥0),f2n=82n-1-2(n≥1).     

最优性原理及方法的进一步研究

动态规划的理论和方法在求解多阶段决策问题中是卓有成效的 ,逆序递推法又是动态规划中基本方法的核心 .本文给出了动态规划中最优性原理的证明 ,还通过实例介绍了逆序递推方法的具体应用 .     

形如xw的双边无限C∞字的组合

文[1]定理2给出了形如w xw的间隙为x（｜x｜≤4）的双边无限C∞字所确定的无限C∞字w恰有12个.文章在此研究定理2的逆问题,并完全确定了形如wxw的双边无限C∞字的间隙x的取值,其中w是由定理2确定的12个无限C∞字.     

形如(w)xw的双边无限C∞字的组合

文[1]定理2给出了形如(w)xw的间隙为x(|x | ≤4)的双边无限C∞字所确定的无限C∞字(w)恰有12个,文章在此研究定理2的逆问题,并完全确定了形如(w)xw的双边无限C∞字的间隙x的取值,其中(w)是由定理2确定的12个无限C∞字.     

基于循环展开的子字并行指令自动生成

针对向量编译的不足,提出一种基于循环展开的子字并行指令自动生成的方法.该方法利用传统的循环变换技术对多媒体应用中可以进行子字并行的循环进行优化,生成子字并行代码.首先识别出可并行的循环,然后通过循环展开、寄存器重命名、指令合并等技术来提升循环体基本块中的子字并行性.在TTA(transport triggered architecture)体系结构的编译框架下用该方法实现了子字并行指令的自动生成.实验表明该方法得到了较好的加速比.     

S-系的内射上生成子

本文借助于模论中的方法,在中心S-系范畴中,给出了上生成子的若干刻画.利用函子的自然同构,给出了平坦S-系的一些刻画,得到了内射上生成子,投射,内射,生成子之间的一些关系.     

图着色问题的逆序蚁群算法研究

针对经典的图着色问题,依据传统图着色算法中逆序图着色的着色思想,结合蚁群算法的搜索机制,给出了逆序蚁群着色算法.根据着色进度和未着色点的相邻点度数随机动态逆序选择新的着色点,使得算法具有较强的搜索全局最优解的能力.利用计算机生产大量随机图作为测试实例,对比逆序着色算法和逆序蚁群算法,实验结果说明逆序蚁群着色算法提高了求解质量,加快了收敛速度,证明了其优良特性.同时算法效率的提高,也保证了该算法可适用于较大规模的着色问题求解.此外,还进行了一系列对比试验,得出了关键参数的合理取值范围.     

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.