高校无线校园网的规划与设计探讨

在信息时代,许多高校教师和一些学生都拥有了个人的笔记本电脑.而现存的有线校园网仅仅具备相对固定的网络接口,导致高校师生在任意时刻和任意地点及时访问校园网的需要不能得到满足.因此,高校无线校园网的规划与设计具有非常重要的意义.本文结合某高校正在建设的无线校园网,探讨了高校无线校园网的规划与设计.     

浅谈无线校园网建设

无线校园网是以WLAN(无线局域网)技术为核心,利用无线加有线的校园网连接方式,为校园用户提供全新的校园网接入模式和无处不在的网路连接。随着最新的IEEE802.11技术的发展,无线网络在具有以太网的速度同时也具有了WLAN的移动性,使得无线校园网成为校园网发展的一种趋势。     

无线校园网的安全策略浅析

通过分析无线校园网的特点和优势,对无线校园网中存在的安全性问题进行研究并给出了一套相对完整的解决方案,包括无线校园网络的物理安全设计、安全配置以及高校无线校园网的管理与维护的措施等。     

关注无线校园网

教育信息化是在教育领域广泛地利用信息技术和信息资源促进教育发展,并实现教育现代化的过程.教育信息化是信息技术在教育中的应用.文中对教育信息化重要基础设施之一的无线校园网建设进行了阐述,探讨了802.11x标准、迅驰技术、无线投影设备、WLAN中国国家标准、WWAN等热点问题,为无线校园网建设提供了思路.     

对无线校园网构建技术的探索

随着教育手段的革新与无线网络技术的发展,基于WLAN的无线校园网络构建技术已成主流,成为有线校园网网络延伸的重要手段之一。文章对无线局域网技术、无线校园网的构建作了介绍,并以某学院新校区的无线校园网建设为实例,提出了初步的设计方案。     

无线校园网的应用与设计

随着无线网络技术的发展与校园信息化水平的提高,基于WLAN的无线校园网络构建技术已成趋势,成为有线校园网网络延伸的重要手段之一。文章对无线局域网技术、无线校园网的设计作了介绍,并以山东省电力学校新校区的无线校园网建设为设计实例,提出了初步的设计方案。     

三网融合技术在无线校园网建设中的应用

从基于三网融合的无线校园网建设入手，详细研究无线校园网建设时所面临的IP地址短缺、QoS保障、无线漫游、认证服务等关键技术，并从理论和实践两方面提出解决问题的办法，以期对基于三网融合的无线校园网建设有一定的实践指导作用．     

基于校园无线网络工程设计研究

随着计算机网络技术的迅猛发展,无线网络在多个领域中得到了广泛应用,基于计算机局域网技术的无线校园网更是发展迅速。它克服了有线网络的束缚,从而实现移动办公、多媒体网络教学等多种功能,因此对教育信息化建设起到了积极推动作用。本文提出选用无线校园网是数字化校园发展的必然趋势,并介绍了实施无线校园网工程设计总体思路和无线校园网的应用。     

浅议无线校园网的接入安全

了解无线校园网网络的主流接入技术,对整个无线局域网安全系统的实现具有重要的意义。本文通过比较无线校园网环境下的几种接入安全技术,重点分析它们的优缺点,提出了一些提高无线接入安全的建议。     

无线校园网的设计研究

结合校园网实际应用需求,在现有校园网络的基础上,对未来的校园无线局域网进行了规划设计.设计内容包括无线拓扑方案、管理与安全方案等.在改善前台分布式AP部署、采用基于角色的LDAP统一认证系统的同时,实现了有线网络与无线网络的统一.在设计过程采用了经验、计算与仿真验证相结合的方式,在实证测试的基础上提出了一个安全、可靠、可管理的无线校园网建设方案.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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