基于Tabu搜索的QoS多播路由优化算法

该文研讨了具有QoS多播路由问题．文中描述了一种适应于研究QoS多播路由的网络模型．该文在网络环境及不确定参数下，提出了一种在网络规模、可行性方面为Internet、移动网络和其他高性能网络基于Tabu搜索的QoS多播路由优化算法(TQMRA)．TQMRA在网络环境及不确定参数下能够优化网络资源．仿真实验结果表明．TQMRA为QoS多播路由提供了一种新的有效途径．     

基于移动代理的多媒体网络QoS分布式关联监测方法研究

采用分布式监测机制来实现多媒体网络业务QoS(服务质量)保证是一个重要的研究方向。首先分析当前多媒体网络QoS分布式监测方法的相关研究;然后将移动代理技术引入QoS分布式监测方法,提出一种基于移动代理的QoS分布式关联监测框架;并以该框架为基础提出一种基于移动代理的QoS劣化网段定位方法。仿真表明了该方法的实时性和有效性,也表明提高了网络接口利用率和减少了网络时延。     

Web系统的QoS控制研究

主要论述了在Internet环境下的Web网站在流量变化很大的情况下通过不同的网络传输模型及Web服务模型实现其QoS控制,能够实现高可伸缩性、高性能、高性价比的Web环境.最后简要论述了WebQoS技术产品及Web QoS技术的研究现状.     

一种新的QoS多播路由优化算法

讨论一种适应于研究QoS多播路由的网络模型.在网络环境及不确定参数条件下,提出了一种在网络规模、可行性方面为Internet、移动网络和其他高性能网络基于Tabu搜索的QoS多播路由优化算法（TQMRA）.仿真实验结果表明,TQMRA在网络环境及不确定参数条件下能够优化网络资源.     

基于主从代理的传感器网络QoS测量模型研究

本文提出了一种基于主从代理协同工作的传感器网络QoS测量模型,通过MSC算法周期性划分测量子网,生成网络拓扑,通过循环轮换选举主从代理节点实现负载均衡。     

基于主从代理的传感器网络QoSN量模型研究

本文提出了一种基于主从代理协同工作的传感器网络QoS测量模型,通过MSC算法周期性划分测量子网,生成网络拓扑,通过循环轮换选举主从代理节点实现负载均衡。     

基于移动代理的网格作业调度模型的研究

网格计算是新一代分布式计算技术.网格作业管理是其最主要的功能之一,主要涉及网格计算环境下作业的调度和分配等问题.其中作业调度是实现高性能网格计算的基本问题,该问题已被证明为NP难题.移动代理是代理agent技术与分布式技术的综合体,根据移动代理自身特点,提出了基于移动代理的网格作业调度模型,针对网格作业调度问题提出最短执行时间MAMET(MobileAgent-based Minimum Execution Time)算法,并在研究移动代理技术特性所带来优势的基础上,利用移动代理间通信等技术实现负载平衡.最后对基于移动代理的网格作业调度模型作单机与联机的性能进行分析和比较.     

一种基于Hopfield神经网络的Adhoc网络QoS路由选择算法

当前研究Adhoc网络的QoS保证主要集中于QoS路由选择。人工神经网络已成为求解大规模优化问题的一种有效方法，已经证明合适的神经网络能实时地得到问题的精确解。主要考虑在Adhoc网络中满足时延条件下的最小耗费问题，建立了一种新的Hopfield神经网络模型，给出能量函数各参数之间的关系，并证明了通过适当选取参数，网络的可行解将是渐近稳定的。计算实例表明了新网络模型的有效性。     

IP网络QoS实现技术研究

文章主要研究基于多协议标记交换 (MPLS)技术和区分服务 (DiffServ) /资源预留协议 (RSVP)结合模型的IP网络服务质量(QoS)实现技术。首先根据带宽代理 (BB)模型给出一种简化的QoS体系结构,然后着重讨论该结构中的 4个主要模块:RSVP模块、DiffServ模块、MPLS模块和BB控制模块。在ns-2. 26上的仿真表明,该方案有效地改善了丢包率和时延这二个QoS性能指标。     

移动代理技术在下一代网络QoS监测中的应用

为了弥补传统网络监测方法在性能、伸缩性以及可扩展性等方面的缺陷,提出了应用移动代理技术的下一代网络QoS监测框架。该框架是分层分布式结构,由中央控制节点层、汇聚节点层和叶节点层构成。在各层中分布有汇聚代理、数据分析代理、数据采集代理和本地故障处理代理等各类移动代理。各种代理具有各自不同的职责,它们相互协调、配合,共同完成QoS监测任务。该框架的可扩展性强,分布式监测效率高,能够降低网络负荷,灵活适应网络拓扑结构的动态变化,并且加快了对QoS劣化现象的响应速度,还能避免在现有的系统中增加新功能时大规模更换升级软件带来的开销。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

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