一类非线性弱奇异积分不等式组中未知函数的估计

研究了一类二维非线性弱奇异积分不等式组.该不等式组积分号外有不同的非常数函数因子,不能用向量形式的Gronwall-Bellman型积分不等式进行估计.利用H?lder积分不等式、 Gamma函数和Beta函数把弱奇异非线性积分问题转化成没有奇异的非线性积分问题,利用Bernoulli不等式把非线性问题转化成线性问题,利用变量替换技巧和放大技巧研究只含有一个未知函数的积分不等式,接着给出不等式组中两个未知函数的估计.该结果可用于研究积分、微分动力系统解的估计.     

加A_r权和A_r~λ权的Hlder型不等式

积分不等式用来估计积分值非常有力,利用权得到了广义Hlder不等式的推广:加Ar权和Aλr权的积分不等式,该不等式可被用来研究积分性质和用来估计积分值.     

加Ar权和Aλr权的H(o)lder型不等式

积分不等式用来估计积分值非常有力,利用权得到了广义H(o)lder不等式的推广:加Ar权和Aλr权的积分不等式,该不等式可被用来研究积分性质和用来估计积分值.     

一类积分不等式组中未知函数的估计

研究了一类二维积分不等式组,该不等式组积分号外有非常数因子,不能用向量形式的Gronwall-Bellman型积分不等式进行估计。为了简化主要结果的证明,先引进两个引理,给出只含有一个未知函数的积分不等式中未知函数的估计,接着利用两个引理和变量替换技巧和放大技巧给出不等式组中两个未知函数的估计。该结果可用于研究积分、微分动力系统解的性质。     

脉冲积分不等式未知函数的估计

积分不等式是研究微分方程和积分方程的重要工具.对非连续函数积分不等式中未知函数进行估计,可以研究某些脉冲微分系统和脉冲积分系统解的一些重要性质.建立了一类新的积分不等式,其不等式左端为未知函数的非线性因子,右端和项中也为未知函数的非线性因子.利用数学归纳法给出了未知函数的上界估计,并用求得的结果给出了脉冲微分方程解的估计.     

一类非连续函数迭代时滞积分不等式及其应用

研究了一类非连续函数迭代时滞积分不等式,给出不等式中未知函数的估计,利用所得估计计算出一类脉冲积分系统解的上界估计,并实例验证了结果的有效性.     

弱奇异迭代积分不等式中未知函数的估计

给出了一类积分项外包含非常数项的非线性弱奇异迭代积分不等式,并利用离散 Jensen 不等式、H\"older 积分不等式、变量替换技巧和放大技巧等分析手段给出了该非线性弱奇异迭代积分不等式中未知函数的上界估计. 最后举例说明所得估计可以用来研究分数阶积分方程解的定性性质.     

一个新的积分不等式

建立了一个新的非线性积分不等式,利用对积分不等式的分析技巧和论证方法,对不等式中的未知函数进行估计,提供明确的界限.     

二元积分不等式的若干推广

本文主要研究一类具有时滞的二元非线性积分不等式.在不要求已知函数的单调性和可微性的条件下,本文通过将不等式中的函数单调化和积分号外函数常量化的方法给出了这类不等式中未知函数的估计,并以推论形式给出相应一元积分不等式中未知函数的解的估计.最后,本文利用该估计证明了一类积分方程和一类微分方程解的有界性.     

一类弱奇异积分不等式组中未知函数的估计

研究了一类二维弱奇异积分不等式组,该不等式组积分号外有非常数因子,不能用向量形式的Gronwall-Bellman型积分不等式进行估计.利用H■lder积分不等式和Gamma函数把弱奇异积分问题转化成没有奇异的积分问题,运用Bernoulli不等式把非线性问题转化成线性问题,并通过变量替换技巧和放大技巧研究只含有一个未知函数的积分不等式,且给出了不等式组中两个未知函数的估计.该结果可用于研究积分、微分动力系统解的性质.     

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.     

Design and analysis of generic LBS application developing platform

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.     

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