集群服务器系统负载均衡原理的分析与实现

随着计算机网络技术的不断发展和光纤技术的不断应用,线路传输速度得到了极大提高,这使得服务器慢慢地成为网络中的瓶颈,集群技术正是解决这一问题的主要手段.通过对LVS系统的分析,讨论在linux环境下采用netfilter功能框架实现单一局域网络集群负载均衡的方法.     

产业集群的网络特性及其发展中的政府导向作用

随着产业集群在全球经济发展中的作用不断突出，我国关于产业集群的理论研究也得到了广泛开展，但目前已有研究成果多集中于对产业集群理论的溯源和集群优势进行分析。关于产业集群自身的网络属性、生命周期和可持续发展的研究还较少。着重从产业集群的生命周期方面对已有的研究工作做出归纳和进一步探索，对目前中国产业集群面临的主要问题和政府在产业集群建设发展中的导向作用作了阐述分析。     

基于网络的湖北装备制造业集群分析

模块生产网络、社会网络和知识网络是构成装备制造业集群的3大主要网络,其中,模块生产网络是基础,社会网络是保障,知识网络是关键.从这3大网络出发,分析得出湖北装备制造业集群正处在初级发展阶段,集群整体竞争力不强.湖北应着力提高装备制造业集群内信息化水平,提高集群内社会资本质量,构建集群内知识网络、优化集群创新环境,从而改善其装备制造业集群结构,实现装备制造业集群升级.     

基于LVS的集群技术研究

用集群技术构建网络服务器是未来网络服务器的发展方向之一,集群计算模式是最经济的计算模式。阐述了集群技术的主要模式、LVS集群的核心技术及其实现的框架体系结构;讨论了存在的问题以及解决方法。     

信息技术文摘

Oracle引入Compaq集群技术 Oracle公司近日做出决定，引入Compaq公司的软件技术，对其即将推出的新一代数据库中的部分关键特性进行改进。在双方签署的一项为期三年、总额4500万美元的协议中，Oracle将使用Compaq的集群技术软件。 集群技术能够允许在多台高端计算机上同时运行一个大型的数据库，允许硬件分时使用，或当网络中一合或几台计算机失效后继续使用。并购了DEC公司后，Compaq在集群技术方面处于领先地位。集群是一项复杂的技术，目前Sun公司等也正在开发各自的集群软件。Oracle计划将 Compaq的集群软件集成到其即将推出的Ora…     

浅谈网络服务器的集群技术

本文介绍了计算机网络服务器的集群技术,重点讨论了集群技术的具体实现方法。现在,网络的规模越来越大,网络中服务器的访问量也变得越来越频繁。服务器是计算机网络的灵魂,必须保证连续的为用户提供高效、可靠、安全和稳定的服务。在网络服务器中使用集群技术,能够为用户提供不间断的可靠高效服务。集群系统中包括了多个结点,当一个结点出现故障的时候,整个系统仍然能够继续为用户提供服务。     

试析我国网络集群行为的概念、类型及其发生原因

网络时代,集群行为从现实社会延伸至网络空间。网络集群行为的频繁发生不仅成为社会稳定的严重威胁,甚至可能损害政府的形象和公信力。研究网络集群行为的概念和特征,合理地对其进行分类有助于人们更好地认识网络集群行为这一现象,阐述其发生发展的原因则有助于人们预防和管控网络集群行为的发生。     

基于镜像的集群系统的部署方法研究与实现

对于拥有大量节点的Linux集群而言，选用一种合适的方法来自动安装部署操作系统和应用软件是必要的。本文利用基于镜像的安装技术及工具、支持网络启动的PXE橼议，采用分布式的网络传揄模型和点对点的通信方式，以实现在集群环境中自动部署Linux操作系统。     

基于集成创新的高技术集群企业技术能力成长研究

通过溯源高技术集群企业技术能力的知识本质,分析集群网络集成、技术知识集成促进企业技术能力成长的机理。运用知识管理理论和组织学习理论,研究高技术集群企业技术学习过程,进而探讨集群企业技术能力持续成长的基本动力。     

区域高新技术产业发展的集群网络化模式

在对集群网络概念界定的基础上，通过对硅谷等几个具有代表性的高新技术产业集聚区成功经验的分析，认为成功的高新技术产业集聚区的成功并非区域内生产要素的简单叠加，而是区域内各种生产要素的有效组合及其形成的紧密集群网络．本文运用社会网络理论探讨了区域高新技术产业集群网络的层次结构及网络作用机制，基于集合论、拓扑学、分形几何构建了区域高新技术产业集群网络形成演化模型，并结合大连市高新技术产业发展实际，探讨了针对城市高新技术产业发展的集群网络化模式．     

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