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1.
利用Holder不等式建立了一类广义的Hardy—Littlewood不等式(简称广义H—L不等式)。特别,当p=q=2时,在离散的情况下就是H—L不等式,在连续的情况下是H—L不等式的一种推广。  相似文献   

2.
设f(x)∈AC[0,H],产F(0)=f(h)=0,则有∫^h0|ff'|dx≤1/2(h/2)^2/Q(∫^h0|f'|^pdx)^2/p-2/q{|f'|^pdx)^2-1/4(∫^h0|f;|^pcos(2πx/h)dx)^2}^4/q其中1<p≤2,Q=P/(P-1).(2)显著比(1)优秀,实际上我国已证得更一般的结果。  相似文献   

3.
介绍了测量不确定度的概念,分类及引入不确定度的原因,提出在工科院校和一般的工程技术中,用不确定度评定测量结果的最基本的方法和应用。  相似文献   

4.
本文在不分明的意义下,对闭包,内部,半闭包及半内部进行研究,得到一些反映它们之间关系的性质定理,此外,当我们将闭包,内部,半闭包及半内部看作四种不同的运算作用到一个不分明集上,可以构造多少种不同的水分明集。对此,本文用若干定理给出了详细的回答。  相似文献   

5.
类似Pachpatte不等式的一些逆向不等式   总被引:4,自引:3,他引:1  
建立了Pachpatte不等式的一些反向不等式,其形式类似于的Hoelder不等式和Jensen不等式,推广了已有的相关结果,使研究进一步深化。  相似文献   

6.
大学物理实验中不确定度的评定   总被引:2,自引:0,他引:2  
讨论了不确定度的评价体系的现代进展,提出了在大学物理实验中推广和使用不确定度的迫切性,就不确定度的评定方法进行了探讨.  相似文献   

7.
进一步探讨了基数不变量之间的关系以及几乎不交加细与完全Ramsey性质之间的关系。  相似文献   

8.
关于不相关和不独立问题的几点注记   总被引:1,自引:0,他引:1  
给定n维分布F(x_1,…,x_n)与m维分布G(y_1,…,y_m),如果存在随机向量X=(X_1,…,X_n),Y=(Y_1,…,Y_m),使得X,Y分别以F, G为分布,X_i,Y_j(i=1,…,n;j=1,…,m)不相关并且不独立,则称F,G存在强耦合,且称n+m维随机向量(X_1,…,X_n,Y_1,…,Y_m)的分布就是F与G的一个强耦合。本文给出了F,G存在强耦合的一个充分条件和一个必要条件。特别地,当n≤2,m≤2时,文中所给的充分条件和必要条件恰好相重合。  相似文献   

9.
本文在证明了Polya-Szego不等式向四面体推广所得的两种形式等价的同时,统一证明了四面体中的一些著名不等式,并加强了这些不等式。  相似文献   

10.
具有记忆性及历史相关特性的不确定分数阶微分方程,自2015年被提出以来,被广泛应用于不确定动力系统演化过程的建模,因此,对该类方程的研究已然成为一个重要课题。该文介绍了不确定分数阶微分方程的定义与性质,总结了近年来关于不确定分数阶微分方程理论与应用方面的研究进展,并对不确定分数阶微分方程未来的研究方向进行了展望。  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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