Banach空间中常微分方程Cauchy问题的近似解与解的关系

讨论Ｂａｎａｃｈ空间中常微分方程Ｃａｕｃｈｙ问题的近似解与解的关系，得到一个Ｃａｕｃｈｙ问题的近似解与解的关系的定理：定理设ｆ＿ｎ∈Ｃ［Ｒ＿０，Ｅ］（ｎ≥１），ｆ∈Ｃ［Ｒ＿０，Ｅ］，序列｛ｆ＿ｎ｝在Ｒ＿０上一致收敛于ｆ；又设０＜α≤ａ，ｘ＿ｎ∈Ｃ￣１［［ｔ＿０，ｔ＿０＋α］，Ｂ（ｘ＿０，ｂ）］，且满足Ｃａｕｃｈｙ问题ｘ＇＿ｎ（ｔ）＝ｆ＿ｎ（ｔ，ｘ＿ｎ（ｔ））ｘ＿ｎ（ｔ＿０）＝ｚ＿ｎ其中ｔ∈［ｔ＿０，ｔ＿０，ｔ＿０＋α］，ｎ＝１，２，…，ｚ＿ｎ∈Ｅ，ｚ＿ｎ→ｘ＿０（ｎ→∞），如果ｘ＿ｎ（ｔ）在［ｔ＿０，ｔ＿０＋α］上一致收敛于ｘ（ｔ），则ｘ∈Ｃ￣１［［ｔ＿０，ｔ＿０＋α］，Ｂ（ｘ＿０，ｂ）］，且对ｔ∈［ｔ＿０，ｔ＿０＋α］，有ｘ＇（ｔ）＝ｆ（ｔ，ｘ＿ｎ（ｔ））ｘ（ｔ＿０）＝ｘ＿０     

Durrmeyer－Bernstein多项式的导数与函数的光滑性

本文研究Ｄｕｒｒｍｅｙｅｒ－Ｂｅｒｎｓｔｅｉｎ多项式Ｄ＿ｎ（ｆ；ｘ）的导数与函数ｆ的光滑性之间的关系，即其中ｆ∈Ｃ［０，１］，０＜ａ≤１，０＜β≤２，Ｍ＿１，Ｍ＿２，Ｍ＿３，Ｍ＿４为正常数．     

算法复杂性函数等价类A[F]中的分解性定理

证明了算法复杂性函数渐近优超等价类数学结构Ａ［Ｆ］中的分解性定理。对任意非免费算法复杂性函数类［ｆ］∈Ａ［Ｆ］及正整数ｎ,存在类［ｇ１］,［ｇ２］,…,［ｇｎ］∈Ａ［Ｆ］满足［ｇｉ］〈［ｆ］（ｉ＝１,２,…,ｎ）且［ｆ］＝Ｖｉ＝１＾ｎ［ｇｉ］。     

Baskakov—Kantorovich算子的Lp饱和等价定理

引入双线性泛函，利用积分方程技巧得出了Ｂａｓｋａｋｏｖ－Ｋａｎｔｏｒｏｖｉｃｈ算子在Ｌｐ［０，∞］关于阶１／ｎ和平凡类Ｔ＝｛ｆ│ｆ＝ｃｏｎｓｔ｝是Ｌｐ饱和的，饱和类的为Ｓｐ＝｛ｆ│ｆ∈Ｌｐ［０，∞），φ＾２（ｘ）ｆ″（ｘ）∈Ｌｐ［０，∞）（１〈ｐ〈∞｝。     

五次(0,3)类缺插值样条的局部渐近性质

本文讨论［１］中所定义的五次（０，3）类缺插值样条Ｓｎ（ｘ），当ｆ∈ｃθ［０，１］时，的局部渐近性质。得到： 定理 设ｆ（ｘ）∈Cθ［０，１］，Sｎ（ｘ）是ｆ（ｘ）的五次（0，3）类（ｉ）型缺插值样条，＝Ⅰ，Ⅱ，Ⅲ，Ⅳ，那么对于任意固定的ｘ∈（０，１），当 n→时有 Ｓｎ（ｘ）＝ｆ（ｘ）－［Ｂθ（ｕ）－１／４２］·ｆ（６）（ｘ）·ｈ６／６！＋ｏ（ｈ６）和 Ｓｎ（ｒ）（ｘ）＝＝ｆ（ｒ）（ｘ）－Ｂ６－ｒ（ｕ）ｆ（６）（ｘ）·ｈ６－ｒ／（６－ｒ）！＋ｏ（ｈ６－ｒ），ｒ＝１，２，３，４，5。其中Ｂ１（ｕ）是首项系数为１的ｊ次Ｂｅｒｎｏｕｌｌｉ多项式；u＝（ｘ－γｈ）ｉ　γ＝［ｎｘ］。     

Bakakov-Kantorovich 算子的 Lp 饱和等价定理

引入双线性泛函，利用积分方程技巧得出了ＢａｓｋａｋｏｖＫａｎｔｏｒｏｖｉｃｈ算子在Ｌｐ［０，∞）关于阶１ｎ和平凡类Ｔ＝｛ｆ｜ｆ＝ｃｏｎｓｔ｝是Ｌｐ饱和的，饱和类为Ｓｐ＝｛ｆ｜ｆ∈Ｌｐ［０，∞），φ２（ｘ）ｆ″（ｘ）∈Ｌｐ［０，∞）（１＜ｐ＜∞）｝．     

环Z／mZ上的多元多项式正交组

设整数ｍ＞１,１≤ｋ≤ｎ以及ｆｊ（ｘ１,…,ｘｎ）∈Ｚ［ｘ１,…,ｘｎ］,ｊ＝１,…,ｋ．本文得到了ｎ元多项式组ｆ１（ｘ１,…,ｘｎ）,…,ｆｋ（ｘ１,…,ｘｎ）构成剩余类环Ｚ／ｍＺ上的正交组的一个充分必要条件：对于环Ｚ／ｍＺ上的任意ｋ元置换多项式ｇ（ｙ１,…,ｙｋ）,均有ｇ（ｆ１（ｘ１,…,ｘｎ）,ｆｋ（ｘ１,…,ｘｎ））为环Ｚ／ｍＺ上的ｎ元置换多项式．     

关于修正的伯恩斯坦插值多项式

对伯恩斯坦［１］构造的以第一类Ｃｈｅｂｙｓｈｅｖ多项式的零点作为插值节点、ｆ（ｘ）∈Ｃ［－１，１］的次数小于λｎ（１＜λ＜２）的插值多项式Ｑｎ（ｆ；ｘ）作以修正，使其在［－１，１］上一致收敛到ｆ（ｘ）且具有最佳收敛阶     

强非退化型在Z／p￣nZ上解的个数公式

设ｐ是一个给定的素数，ｆ（ｘ＿１…，ｘ＿ｋ）∈ｚ＿ｐ［ｘ＿１…，ｘ＿ｋ］，且ｆ（ｘ＿１，…，ｘ＿ｋ）是一个ｄ（ｄ＞０）次强非退化型，这里Ｚ＿ｐ代表ｐ－ａｄｉｃ整数环，设ｃ＿ｎ是模ｐ￣ｎ剩余类环Ｚ／ｐ￣ｎＺ上方程ｆ＝０的解的个数，本文给出ｃ＿ｎ的一个直接公式，这是Ｇｏｌｄｍａｎ有关结果的改进。还证明了ｄ≥ｋ时，ｃ＿Ｒ≡０（ｍｏｄｐ￣（ｎ－１）（ｋ－１）．     

用球面Jackson多项式刻划Besov空间

记Ｓｎ－ １ 为ｎ（ｎ ≥３） 维欧氏空间Ｒｎ 中的ｎ － １ 维单位球面,Ｘｐ （Ｓｎ－ １） 为Ｓｎ－ １ 上的ｐ（１ ≤ｐ ≤∞） 幂可积函数空间,或连续函数空间,并记Δ＝ ｛ｇ（ｘ）｜ｇ,Δｇ ∈Ｘｐ （Ｓｎ－ １）｝,Δｆ ＝ ｎｉ＝ １２ｇ（ｘ）ｘｉ２ ｜｜ｘ｜＝ １,ｇ（ｘ） ＝ ｆ（ ｘ｜ｘ｜）．作Ｋ 泛函Ｋ（ｆ,δ）ｐ ＝ ｉｎｆｇ∈Δ｛‖ｆ － ｇ‖ｐ ＋ δ‖ｇ‖Δ｝以及Ｂｅｓｏｖ 空间（Ｘｐ ,Δ）θ,ｑ（０ ＜ θ＜ ２,１ ≤ｑ ≤∞）,则有下面的（ｉ）,（ｉｉ） 为等价的：（ｉ）　ｆ ∈（Ｘｐ ,Δ）θ,ｑ;　（ｉｉ）　［∞ｖ＝ １（ｖθ‖Ｊｖ,ｓ（ｆ） － ｆ‖ｐ）ｑ １ｎ ］１ｑ ＜ ＋ ∞当ｑ＝ ∞时,ｆ ∈（Ｘｐ ,Δ）θ,∞‖Ｊｖ,ｓ（ｆ）－ ｆ‖ｐ ＝ Ｏ（ｖ－ θ）,其中Ｊｖ,ｓ（ｆ）为球面Ｊａｃｋｓｏｎ 平均。     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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