偶数P级数与相关级数的求和递推公式

利用函数f（x）=x在[0，π]上的舟里叶级数展开式和函数的特点．给出四类级数∞∑n=1 1/n2m,∞∑1/（2n-1）2m,∞∑n=1（-1）n-1/n2m,∞∑n=1（-1）n-1/（2n-1）2m＋1的求和递推公式和相互关系。其中：∞∑n=1 1/n2m,∞∑n=1（（-1）n-1/（2n-1）2m＋1的递推公式中，分别不涉及到贝努利数和欧拉数。     

正项级数收敛性的比式判别法的进一步推广

给出了正项级数收敛性的一些新的判别方法 ,主要结果为定理 1与定理 2。定理 1 :对正项级数 ∑∞n =1an 及∑∞n =1bn,结果有 {n}的一个子列 {nk} ,nk >k ,使ank iak i bnk ibk i(0 i N0 ,都存在kn 相似文献   

富里埃级数关于阿贝尔平均和蔡查罗平均的局部饱和现象

§1.总说我们记在[-π,π]上是勒贝格可积的,以2π为周期的周期函数的全体为L_(2π)。设f(x)∈L_(2π),其富里埃级数是?(f,x)=a_0/2+sum from n=1 to ∞(1/n)(a_ncosnx+b_nsinnx)=a_0/2+sum from n=1 to ∞(1/n)A_n(x) (1)级数(1)的共轭级数是?(f,x) = sum from n=1 to ∞(1/n)(-b_ncosnx+a_nsinnx) 我们还将考虑级数     

无穷等比级数求和公式∑∞n=0axn=a/1-x在级数中的应用

利用无穷等比级数的求和公式∑∞n=0axn=a/1-x(|x|＜1)求幂级数和函数的两大类级数的通式,给出了四种函数在展开成幂级数及泰勒级数过程中,应用求和公式的间接展开法.     

一类级数求和方法与求和公式

探讨形如∑∞x=2f(x)(ξ-)(x)的级数求和方法,并给出一个求和公式,其中f(x)为多项式函数,(ξ-)(x)=ξ(x)-1,ξ(x)为Riemann Zeta函数.     

单调有界准则的推广与级数sum from n=1 to ∞ sin~m(an+b)/n~α的敛散性

利用致密性定理获得有界数列{y_n}收敛的一个充分条件:∨ε>0,■N∈Z+,使得当n>Z时,不等式yn-yn-1<ε恒成立。并发现任意项级数收敛的一个判定定理:如果级数sum from n=1 to ∞ a_n有界,且limn→∞a_n=0,则该级数收敛。由此获得:级数sum from n=1 to ∞ sin~(1+2s/t)=n/n~α收敛,其中s∈Z,t∈Z+,0<α≤1。并进行推广:如果s∈Z,t∈Z~+,0<α≤1,则级数sum from n=1 to ∞sin~1+2s/t)(an)/n~α收敛。再获得一个一般性结论:设有界函数f(n)满足0≤f(n)0,k,l∈Z。     

级数sum from n=1 to ∞(n~βa_n~γ(f)φ_n~γ(x))绝对收敛性

文献 [1 ]针对多种情况 ,证明了Walch Fourier级数和级数∑∞n=0aγn( f) φγn(x)的绝对收敛性。本文对此进一步讨论 ,开拓了文献 [1 ]的结果。     

级数求和的若干方法

实值级数sum from n=1 to ∞的和,定义为lim n→∞ S_n=lim n→∞ （sum from k=1 to n（a_））,对于收敛级数的求和方法,常用的有裂项相消法,利用幂级数在收敛区间内的逐项可积,逐项可导等方法来简化计算。本文给出了数学归纳法、Abel定理、幂级数展开式、复数级数展开式等方法来解决收敛级数的求和问题。     

双随机Dirichlet级数的收敛性和增长性

文章研究系数{Xn}满足∑n=0^＋∞P{｜Xn｜≥n^p}〈＋∞，∑n=0^＋∞P{n^p｜Xn｜≥c}=＋∞（任意〉0）及指数在条件limλn/Eλn=1下的双随机Diriehlet级数的收敛性和增长性。     

某些Lucas级数的无理性

讨论Δ=p2-4q<0时的二元递推关系un+1=pun-qun-1(q≠0,q∈Z).设{un}与{vn}分别是初始11与∑∞进行某些情况下的求和与无理性的讨论.条件u0=0,u1=1与u0=2,u1=p下所得到的级数,对∑∞vnunn=1n=1     

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