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1.
在一元正交多项式的基础上,定义了二元正交多项式。由此引入二元正交多项式空间的核多项式,用核多项式定义尺度函数,用张量积构造二元正交多项式小波。研究了尺度函数和小波函数的性质,给出了两尺度关系及分解式,把一元正交多项式小波进行推广,使之应用范围更加广泛。  相似文献   

2.
色轨道多项式是色多项式与Polya计数公式的推广,本定义了色轨道多项式及其相应的概念加P-图,SC-图等,给出了色轨道多项式的表达式和计算方法,讨论了色轨道多项式的基本性质,作为它的一个应用,给出了项链问题的具体计数公式。  相似文献   

3.
定义了简单图的独立集多项式,讨论了图的独立集多项式与图的匹配多项式的关系,给出了图的独立集多项式的结构特征.  相似文献   

4.
将矩阵引进了多项式讨论,给出了多项式的系数矩阵、(左)右乘矩阵BA、多项式矩阵Af(x)的概念,并基于这些矩阵探讨了多项式的性质.  相似文献   

5.
多项式矩阵根及其应用研究   总被引:1,自引:0,他引:1  
本文在引用源根表达多项式矩阵根基础上,介绍了多项式矩阵根的性质和多项式矩阵根的简便求法,并结合实例研究了多项式矩阵根在解题中的应用。  相似文献   

6.
本文讨论拟多项式根的数目,结果表明,关于多项式的布丹定理和笛卡儿符号规则,经改进后对拟多拟多项式仍然有效。除此之外还研究了拟多项式组的公根,并得到了拟三项式的判别式。  相似文献   

7.
对一类典型的模P的奇异多项式,给出了模P′的置换多项式的充要条件,给出了是模P ̄2的置换多项式而不是模P ̄3的置换多项式的二元多项式例子.从中可看出不可能象判别f(x)为是否为模P′的置换多项式那样,通过对f(x_,…,)在Z/p_Z上的刻划得到f(x_1,…,)是模P′的置换多项式的充要条件。  相似文献   

8.
计算机代数中分圆多项式的直接判定算法   总被引:2,自引:0,他引:2  
本文利用分圆多项式的所有根是单位根的性质,直接从给定的多项式入手,提出了判定一个多项式是否为分圆多项式的算法.算法简单明了,易于实现.  相似文献   

9.
Clar结构因其在比较分子稳定性中的作用而广受关注.Shiu WC等人计算了Q。的Clar结构的数量并给出其Clar多项式和sextet多项式,而对于硼氮富勒烯,相应的问题尚未解决.本考查了Seifert G等人确定的最稳定的3种硼氮富勒烯的结构特征,通过组合原理得到B12N12,B16N16的Clar多项式和Sextet多项式,并给出了详细证明.此外还给出用于一般硼氮富勒烯的计算程序,并作为例子给出B28N28的Clar多项式和Sextet多项式.本的结果解决了一般的硼氮富勒烯分子Clar多项式和Sextet多项式的计算工作。  相似文献   

10.
关于图Fn补图伴随多项式根的讨论和相关结果   总被引:1,自引:0,他引:1  
文献[4]中引入了伴随多项式的概念来讨论图的色性.由于伴随多项式系数的特点,决定了它的根具有特殊性,本文利用伴随多项式的性质,讨论了Fn补图伴随多项式的最小根问题,它对解决Fn补图的色唯一性有着重要意义.  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
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.  相似文献   

14.
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.  相似文献   

15.
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。  相似文献   

16.
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.  相似文献   

17.
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.  相似文献   

18.
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-  相似文献   

19.
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-  相似文献   

20.
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  相似文献   

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