Veljan-Korchmaros型不等式的稳定性版本

利用欧氏空间Eⁿ中偏正度量与几何不等式理论, 研究n维单形Veljan-Korchmaros型不等式的稳定性版本, 得到了n维单形Veljan-Korchmaros型不等式稳定性版本的一些推广, 获得了一些更强的稳定性版本.     

单形几个不等式新的稳定性版本及应用

利用单形的"偏正"度量与几何不等式理论,研究欧氏空间En中n维单形几何不等式的稳定性,获得关于单形宽度的Sallee-Alexander与张-杨不等式新的稳定性版本,以及关于单形体积的Veljan-Korchmaros不等式新的稳定性版本,推广了已有的结果.     

有关n维单形几个不等式的稳定性

利用距离几何的理论与方法研究了欧氏空间中n维单形的几个几何不等式的稳定性,从两个单形的"偏正"度量证明了n维单形四个重要几何不等式的稳定性,并给出这些几何不等式的稳定性版本。     

关于单形外接球半径两个不等式的稳定性

利用偏正度量与几何不等式理论研究单形几何不等式的稳定性,证明关于单形外接球半径的两个不等式是稳定的,并给出它们稳定性版本.     

关于单形稳定性几个不等式的推广

本文研究了F^n中n维单形的稳定性,在总结已有结论的基础上,对单形的稳定性进行了推广,同时也给出了单形几何不等式的新的稳定性版本,改进了已有的结论。     

关于离散系统的稳定性

建立了一些时滞离散不等式,通过不等式分析,研究了一类Volterra型离散系统的稳定性.对于Volterra型离散系统的全局指数稳定性,给出一些新的充分条件.     

关于Sallee-Alexander不等式与Veljan-Korchmaros不等式新的稳定性版本

利用单形的"偏正"度量与几何不等式理论,研究欧氏空间En中关于n维单形的SalleeAlexander不等式与Veljan-Korchmaros不等式的稳定性,利用cscθ≥1的性质,获得它们新的稳定性版本,将原有的稳定性版本推广为对(n维单形Ω,τ∈[2,n],有(W(Ω))-2 n2-1)≥(cscθ)1/(n-1)2[βn(n+1)n+1/n/n(n!)2/nV-2/n]n2-1+λ(n,τ)·δ(Ω,Ω)和(W(Ω))-2(n2-1)≥(cscθ)1/(n-1)2(βnR-2)n2-1+λ(n,τ)·δ(Ω,Ω),证明它们是稳定的,推广了这些不等式得出了相应的推论。     

自反巴拿赫空间中混合变分不等式的稳定性与Tikhonov正则化

在自反巴拿赫空间中介绍混合变分不等式的Tikhonov正则化并建立其相关理论.首先,建立Minty型混合变分不等式的解集非空有界的等价刻画.利用Minty型混合变分不等式解集非空有界的等价条件讨论映射与非线性项同时被扰动时,Minty型混合变分不等式的稳定性.基于此稳定性结果,研究Tikhonov正则化的Minty型混合变分不等式解集的特征与扰动分析.进而,获得Tikhonov正则化的广义混合变分不等式解集的特征与扰动分析.     

具有多变时滞的中立型系统的稳定性分析

考虑了一类含有多时变时滞的中立型系统的稳定性分析问题,基于Lyapunov稳定性理论,并借助于Jensen积分不等式和线性矩阵不等式技术,给出了多时变时滞中立型系统稳定的新的充分条件。     

一类多时滞中立型方程描述的神经网络渐近稳定时滞依赖判据

通过引入适当的Lyapunov-Krasovskii泛函,给出一类由多时滞中立型方程所描述的神经网络的稳定性判据,该稳定性判据不仅与离散性时滞相关,而且依赖中立型时滞,由于稳定性判据基于线性矩阵不等式,因此其求解方法可以使用各种凸优化算法,使用Matlab工具箱中的线性矩阵不等式算法,给出数据仿真实例,验证了方法的有效性.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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-