计算机机房的管理与维护

对计算机机房的管理与维护进行了探讨, 并对常用的管理及维护方法进行了比较. 在深入分析Ghost软件特点的基础上, 采用Ghost软件的多播技术, 使计算机操作系统得以快速恢复与安装, 解决了安装恢复计算机操作系统需要大量时间和人力的问题.     

Linux下无人值守安装的实现

大批量安装部署L inux学生实验机器时需要反复安装配置系统,由于计算机硬件的差异不能保证每台机器配置的环境的一致性,而且采用手工安装的方式效率低下;介绍了K ickStart的无人值守的网络安装模式,不仅提高了效率而且不受计算机硬件差异的限制。     

简述方正保护卡的运用

该文结合笔者多年来从事高校信息化教学设备管理及维护工作所积累的经验。考虑到目前全国各个教学机构普遍采用方正计算机作为信息化教学用的首选计算机的现实情况,对方正集团为计算机配备的各种类型的硬盘数据保护卡的功能提点、安装环境、安装使用中出现的问题及解决方法进行了简述和分析,对出现的问题给出了一些解决方法。     

网络的设置计划与安装测试

针对计算机网络的设计与安装，论述了网络需求和设置计划，提出了电缆的设计、测试准则，以及网络安装和测试方法。     

局域网计算机的安装与维护

学校专业计算机实验室和公共计算机实验室的维护工作量特别大．从计算机系统的安装、保护和恢复等方面，阐述了如何快速有效地管理和维护局域网计算机．     

网络还原精灵和Ghost在计算机机房管理中的应用

当学校、网吧、企业的计算机需要安装相同的操作系统和软件时,利用Ghost克隆大批量客户机系统省时、省事、而且效率非常高,克隆完成以后利用网络还原精灵对客户端计算机进行有效的管理和控制又方便、灵活,这种利用网络还原精灵和GHOST克隆计算机的方法非常适合学校机房、网吧、企业的计算机的操作系统的安装和维护。     

在WindowsNT上安装Win95无盘站方案

就在WindowsNT上,如何建立Windows95无盘工作站,提出了方案,讨论了安装的步骤和方法,提升了计算机及应用软件的网络操作平台,进一步方便和满足了当前计算机用户的需求。     

在WindwsNT上安装Win95无盘站方案

就在WindowsNT上,如何建立Windows95无盘工作站,提出了方案,讨论了安装的步骤和方法,提升了计算机及应用软件的网络操作平台,进一步方便和满足了当前计算机用户的需求。     

网络版学生管理系统的设计与实现

本文阐述了如何用Delphi和SQL Server数据库开发网络版学生管理系统。该系统分为服务器和客户机两部分。在学工处的一台计算机安装服务器软件,实现学生信息的录入、修改、查询等;在各系办公室计算机上安装客户机,实现学生信息的查询、提交学生信息录入、修改的申请等。     

Vmware workstation在计算机装调与维护实训中的应用

介绍《计算机装调与维护》公选课程的特点,硬件组装和软件安装部分的教学方法,使用VMWare workstation虚拟机解决操作系统安装方面遇到的困难,及如何利用VMWare workstation安装操作系统。     

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.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

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.     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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     

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-     

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