噪声中已知信号的有限样本Robust检测

本文采用了一个新的噪声模型■与经典的噪声模型相比,该模型能更客观、全面地反映实际噪声的分布情况。针对该模型求得了噪声中己知信号的有限样本Robust检测器,研究了它的应用范围,分析了它的性能。结果表明,它在总体上比参数检测器更优越。     

水工复合模型初析

复合模型是工程水力学中一种新的模拟手段，它结合了数学模型和物理模型的优点，拓宽了模型的研究范围，提高了模型的模拟精度，但是它的制作却存在着一定的困难.本文阐述了复合模型的发展；探讨了为保证复合模型整体稳定可靠的运行，复合边界部分应注意的问题.     

单指数模型参数估计的递归算法的大样本性质

主要研究了半参数统计中的单指数模型,分析了单指数模型参数估计中应用于大样本的递归算法,证明了它的相合性和渐近正态性,给出了它的大样本性质.     

基于物理过程描述的诊断推理

本文提出了一种基于对复杂系统中各种相关过程描述的诊断知识模型.该模型具有如下几个方面的特点:a.它是一种基于复杂系统中各种相关的物理过程描述的较深程度的知识模型;b.它是基于约束传播原理,采用定性推理和定量计算两种方式,实现对各子系统的正常与异常行为的描述;c.它本身包含了复杂系统中多种因果关系知识.文中以发动机化油器为具体诊断对象,讨论了该模型的实现与应用中的有关问题.     

基于数据库的嵌入式工作流管理系统——GoEasyWFMS

探讨嵌入式工作流部件在过程建模、事件驱动机制、多应用集成等方面可能出现的问题,并提出一个工作流模型:其静态模型描述了系统的静态元素,它是WFMS中比较稳定的部分;而动态模型描述了系统的动态特征,它是WFMS优化和重组经常涉及的部分.最后给出一个工作流规范说明语言,它形式化了我们提出的工作流模型.     

权回归模型中的相对效率

将线性模型中定义的一种新相对效率e4()=min1≤i≤pλi(Covβ)λi(Cov)推广到权回归模型中,并研究了它的下界以及它与某些广义相关系数之间的关系.     

一种新的ATM网业务模型

提出一和中新的ＡＴＭ网业务模型，它去除了ＭＭＰＰ等信源业务模型中的泊松到达假设，更符合ＡＴＭ中业务的性质，它可以用于描述数据，语音、视频，甚至它们的复哈 业务流。给出了对这种模型进行排队分析的流体流分析法。     

Cox模型及其相关问题的延伸

Cox模型是生存分析中很重要的半参数模型,它在模型解释和估计方法上都有很多优良的性质.综述了Cox模型的研究现状以及最新的研究成果.     

最小二乘估计的不变性

本文推广了多元线性模型中最小二乘估计的概念,给出了参数函数的最小二乘估计的定义,并指出了最小二乘估计的不变性和它与充分统计量的关系以及在正态模型中它与极大似然估计的等价性。     

非线性规划的对称对偶性

提出了一个非线性规划的对称对偶模型 ,它统一了非线性规划中两类对称模型。在不变凸条件下证明了该对称对偶模型具有弱对偶性、强对偶性和逆对偶性     

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