综合布线施工的几个阶段与具体要求

在一个大规模的建筑群中进行综合布线是一项复杂的系统工程,它需要逐步实施.由于网络综合布线的复杂性,首先要进行详细的布线系统设计,然后再按照设计图纸和要求进行施工.这样才能做到有的放矢,严格按照设计要求施工,满足用户的需求.     

结构化布线系统的特点与测试

对网络结构化综合布线系统进行了介绍．尤其对结构化布线系统(SCS)所包含的6个模块，以及网络布线工程线路验收时所需测试做了较为详细的论述．     

浅谈结构化布线系统的特点与趋势

作为网络工程的一部分,结构化布线系统的作用已愈显突出。与传统的布线系统相比较,结构化布线系统具有兼容性、灵活性、可靠性、开放性、模块化、扩展性、先进性、经济性等特点;具有向标准化、宽带化、综合化、智能化和数字化方向发展的趋势。     

智能建筑结构化综合布线的若干问题

计算机网络技术与综合布线系统息息相关。由于计算机和通信技术的飞速发展，网络应用已成为人们日益增长的一种需求，而结构化布线是网络实现的基础，是现今和未来计算机网络和通信系统的有力支撑环境。一、智能建筑与综合布线系统综合布线系统（PDS，PremisesDistributionSystem）是一套开放式的布线系统，可以支持几乎所有的数据、话音设备及各种通信协议，同时，由于PDS充分考虑了通信技术的发展，设计时有充分的技术储备，能充分满足用户长期的需求，应用范围十分广泛。而结构化综合布线系统因具有高度的灵活性，各种设备位置的改变…     

结构化综合布线与图书馆自动化

随着科学技术的发展,计算机与通信网络技术日新月异。在设计新的图书馆自动化网络时,谁都想设计出一个现代化的、超前的网络布线系统.笔者认为,图书馆自动化的建设需要现代化的载体、现代化的设备和现代化的管理,才能达到设备现代化、服务计算机化、管理智能化的目标。其中对自动化系统采用结构化(PDS)综合布线具有无可比拟的重要性和必要性。     

综合布线系统的应用

介绍了一种流行的“传输平台”——综合布线系统 ,简述其在写字楼、智能大厦和智能家居中的不同应用。全面阐述了智能大厦的综合布线系统 ,并结合我国国情提出了建设智能大厦的意见和看法。     

现代智能大厦的综合布线

随着Internet和信息高速公路的发展,国内许多机关、集团公司也都针对自己的建筑物进行综合布线,以期成为智能大厦,而综合布线系统(PDS)则是智能大厦的基础和骨架。综合布线的兴起与发展是办公自动化进一步发展的结果。综合布线系统的对象是建筑物或楼宇内的传输网络,使语音、图像和数据通信设备、交换设备与其他信息系统彼此相连。     

广西柳州钢铁(集团)公司办公大楼网络布线系统的设计与实现

对采用IBDN结构化综合布线系统标准设计广西柳州钢铁（集团）公司办公大楼网络布线系统进行系统分析,并详细讨论网络拓扑结构的选择、布线子系统的设计、布线设备和材料的选择、信息点的分布设计和布线系统的施工等技术。     

结构化布线系统的发展

本文论述了建筑电气的发展现状，同时介绍了建筑物结构化布线系统的原理、组成、功能及其发展过程。     

浅谈综合布线实验室的建设

虽然综合布线系统已经不是一个陌生的名词,但是却没有引起足够的重视。由于经费和人员素质的问题,综合布线经常只停留在口头上,实际建设时并没有严格按照综合布线的要求合理施工。因此在相关的职业院校中综合布线实验室的建设是很有必要的。     

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