非线性分数阶微分方程奇异边值问题的唯一解

研究了非线性分数阶微分方程边值问题Dα0+u(t)+f(t,u(t))=0,0相似文献   

分数阶微分方程边值问题解的存在性

利用上下解方法与Schauder不动点定理,研究了一类非线性分数阶边值问题解的存在性:{D_(0+)~αu(t)=f(t,u(t)),t∈[0,1],u(0)=u(1)=u′(0)=u′(1)=0,其中α∈(3,4],是一实数,D_(0+)~α是Riemann-Liouville分数阶导数,推广和改进了已有的结果.     

一类非线性分数阶微分方程边值问题解的存在性

利用Schauder不动点定理给出下面非线性分数阶微分方程边值问题D0α+u(t)=f(t,u(t)),0相似文献   

一类带参数的分数阶微分方程边值问题多个正解的存在性

运用不动点指数理论,作者研究了带参数的分数阶微分方程边值问题{Dα0+u(t)=λf(t,u(t)),00是一个参数,3<α≤4u′(0)=u′(1)=0是一个实数,Dα0+为标准Riemann-Liouville微分算子.     

非线性分数阶微分方程边值问题多重正解的存在性

 研究了非线性分数阶微分方程边值问题 ^cD^α₀₊u(t)+f(t,u(t))=0, 0cD^α₀₊为Caputo分数阶导数.通过Green函数的性质,利用不动点定理得出了奇异和非奇异微分方程边值问题多重正解的存在性的一些理论以及奇异问题的唯一解存在性理论,并给出了相应的例证.     

非线性分数阶微分方程边值问题解的存在性和唯一性

主要研究了非线性分数阶微分方程边值问题{D_0~α+u(t)=λf(t,u(t),D_0~β+u(t)),0t1;u(0)=u′(0)=u(1)=0解的存在性和唯一性.其中:0λ1,2α≤3,0β≤α-1,f∈C([0,1]×R~2,R),D_0~α+与D_0~β+是标准的Riemann-Liouville微分.利用Schauder不动点定理给出了解的存在性,利用Banach压缩映像原理得到了解的唯一性.     

分数阶微分方程边值问题正解的存在性

利用不动点指数理论,在相应线性算子的第一特征值的条件下,对下面的分数阶微分方程建立了正解的存在性定理Dα0+u(t)+f(t,u(t))=0,0相似文献   

带参数的四阶边值问题正解的存在性

高阶微分边值问题在物理学、工程学有着广泛的应用.许多专家学者研究了高阶边值问题的正解存在性,并得出了很好的结果,尤其对带参数的四阶边值问题的研究更为深刻.主要运用锥拉伸压缩不动点理论,研究了带参数的四阶边值问题{u(4)(t)+βu″(t)-αu(t)=μf(t,u(t)),00.     

一类三阶三点边值问题正解的存在性

考虑一类三阶三点边值问题u(t)+a(t)f(u(t))=0,t∈(0,1),u(0)=u’(0)=0,u’(1)-αu’(η)=λ, 其中,0<η<1,0<α<1/η,λ>0,f满足超线性或者次线性条件,利用锥上的不动点定理,得到上述边值问题解的存在性结果.结果表明:文中方法进一步改进和推广了吴红萍的结果.     

一类一维p-Laplacian非线性奇异三点边值问题正解的存在性

利用Leray-Schauder非线性抉择定理和锥不动点定理证明一类一维非线性奇异p-Laplacian三点边值问题{(Φ(u′))′+q(t)f(u(t))=0,0t1,u(0)=0,u(1)=αu(η),0η1,0α1存在一个正解u∈C[0,1]∩C1(0,1],在(0,1]上u0,其中Φ(s)=s p-2s,p1,允许q(t)在t=0有奇性,并且非线性项f在u=0处具有奇性.     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with