对里卡特算法的改进

本文在文献[1]的基础上,针对分布式环形网的环境,对文献[1]所给算法加以改进,并论证了改进算法的正确性及其在性能方面的优越性.     

带有未建模动态的一类非线性系统的鲁棒自适应控制

本文针对一类带有未建模动态的非线性系统,在文献[1]的基础上设计了一种鲁棒自适应算法,并在理论上证明了系统的稳定性,利用这种算法,只要适当选择设计参数,可以使输出均方误差任意小.本文参考文献[1]的方法,弥补了文献[2]没有考虑未建模动态的不足,并将文献[1]的方法扩展到了更为广泛的一类非线性系统.     

机动目标的多模型跟踪与预报算法

以文献 [1]所给严格的最小二乘递推 (R2 LS)算法为基础 ,并结合多模型和模型重新初始化技术 ,提出了一种机动目标的多模型跟踪与预报 (MMTP)算法 .由于该算法中的大量运算可离线完成 ,因而极大地减少了在线计算量 ,使得MMTP算法能满足实时要求 .     

基于预测有效度的组合预测模型近似求解

在文献[1]的基础上,首先指出了文献[1]算法存在的一些缺陷,然后给出了组合预测方法精度均值E(A)等于各单项预测模型精度序列均值E(Ai)(i=1,2,…,m)的线性组合的一个充分条件,并给出了组合预测精度的上限和下限估计,从而就一般的情况提出了基于预测有效度的组合预测模型新的近似求解方法.最后以文献[1]中的实例说明了本文算法的有效性.并和文献[1]的结果进行了比较分析.     

文后参考文献著录规则(2)——GB/T7714-2005

文献类型和文献类型标志期刊[J]、标准[s]、专利[P]、报纸[N]著录举例[1]高鲁山,郑进保,陈浩元,等．论科技期刊的参考文献[J]．编辑学报,1992,4（3）：166—170．[2]李晓东,张庆红,叶瑾林．气候学研究的若干理论问题[J]．北京大学学报：自然科学版,1999,35（1）：101—106．     

一种广义互补问题的磨光方法

文章基于文献[1]中一种广义互补问题的转化模型，建立了一种磨光牛顿算法，并在适当的条件下，证明了这种算法的超线性收敛性和Q-二次收敛性．     

报酬与时间有关的马氏决策规划

本文研究了报酬函数与时间有关的MDP模型,推广了[1]文献中相应的结果.文中在放弃了文献[2]、[3]中某些限制条件的情况下,讨论最优周期策略、ε最优周期策略的存在性,并给出算法.     

关于二进制GCD算法的注记

求两个正整数a、b的最大公因子 gcd (a ,b)通常使用经典的Euclid算法 .因共需O(lnN)次带余除法 ,每次带余除法耗时O(ln2 N) ,所以Euclid算法耗时O(ln \% 3 N) ,这里N =max(a ,b) ,文献 [1 ,Corollary 2 .1 ]和 [2 ,例 5]就是这样粗略估算的 .然而 ,如果在实现算法时考虑到每步带余除法被除数的位数在不断下降 ,总运行时间将仅为O(ln2 N) ,文献 [3,p .32 8]和文献 [4,p .1 3]指出并证明了这一点 ,在文献 [5]定理 1的证明中也提到了这个事实 .1 96 1年Stein发明了一种求 gcd的新算法 (见 [J .Comp .Phys .1 (1 96 7) ,397- 40 5]) ,简…     

利用逻辑扩展计算二终端网络可靠度

利用布尔代数和不交和等方法提出了计算二终端网络可靠度的一个有效算法．运用简单方法将矩阵逻辑扩展中出现的大量的相同矩阵,进行合并,减少了矩阵数,从而有效地减少了运算时间．该算法推广和改进了S.Rai等在文献[1]中给出的计算二终端网络可靠度的算法．     

多目标灰局势决策的一种新的优序方法

基于灰局势决策的原始思想与算法,提出了一种加权决策算法,主要将文献[1]中运用判断矩阵确定权算法引入灰局势决策原始算法中。这种加权决策算法打破了限制目标对事件的权重一致化,而是给出目标不同的权重,在实际事件决策中具有一定的合理性和有效性。并应用实例表明文中提出的决策方法的可行性和决策算法的有效性。     

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.     

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     

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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