大型企业计算机及计算机网络的互连

分析大型企业计算机，计算机网络互连中产生的问题，探讨互连结构的合理性，认为将企业的管理计算机系统分为两级构造，并将生产厂的控制计算机控制直接与本厂的管理计算机网络连更加合理。     

基于PXE的无盘Windows XP在我校计算机实验室中的应用

目前计算机实验室广泛采用硬盘还原卡来保护计算机系统,本文分析其优势以及带来的同题,并提出在计算机实验室采用基于PXE的无盘windows XP启动有盘工作站的"无盘"与"有盘"相结合的管理方式,不仅可以很好地解决使用还原卡保护系统带来的问题,并且系统安装与升级、管理与维护非常方便,大大减少实验室维护工作量.     

浅谈计算机网络的安全

介绍了计算机网络安全的基本特性及其要素，简述了常见的计算机网络攻击方式及实施网络安全的基本方法。     

计算机教学网络

随着计算机技术的发展,学校开设计算机课程已非常普及,许多学校拥有自己的机房和几十台微机。由于大部分都是单机,而且不一定装置硬盘。因此,只能进行一些比较简单的操作,随着软件技术的飞速发展,对计算机的硬件要求也相应提高,原有计算机不能支持新软件的运行,因而影响了正常的计算机教学。为了提高对原有微机的性能加装硬盘是方法之     

浅谈组织结构分散型企业如何组建安全独立的计算机网络

介绍了组织结构及地域分散的企业，如何建立自身安全的独立的计算机网络管理平台。包括网络设计、硬件部分选择及软件推荐。     

计算机网络病毒的危害与防治

介绍了计算机网络病毒的发展和主要特性,分析了其传播途径,并根据工作实践提出了防治措施。     

浅谈计算机网络的信息安全及防护策略

随着计算机技术的飞速发展,信息网络已经成为社会发展的重要保证.信息网络涉及到国家的政府、军事、文教、生产、生活等诸多领域.计算机网络信息的安全与防护研究,在信息化建设中具有极其重要的现实意义.本文以网络信息安全为研究内容,对当前计算机网络信息安全存在的主要问题进行了深入剖析,并针对现实问题提出了相应的防护策略.     

浅谈电解多功能机组的几种常见拖动方式

针对电解多功能机组应用变频器拖动控制中,较受关注的几种拖动模式问题进行介绍、分析,突显了一拖二拖动控制模式的低成本特点,也明确了主从同步和主令同步优异的控制特性.     

计算机网络技术的应用

本文叙述了传统人工管理档案的一些弊端和现代化档案管理中计算机网络技术，条码技术的应用及其长远意义。     

计算机网络的安全体系

叙述了从国际互联网到局域网，网络安全体系的构成成分、体系结构以及各成分在相应结构体系中的作用和应用发展前景。     

宝钢科技图书馆对等网络系统

宝钢科技图书馆的管理采用对等网络系统，实现了流通，编目，检索查询，采购的一体化，成为面向企业图书馆需求的方案。     

局域网组网技术中无盘工作站的应用

无盘站技术以其安全性、易维护、低成本等特点正逐渐被应用于财务网、教学网以及个人网站 .本文以 Novell为基础 ,从网络的建立、设置、维护等几个方面加以阐述 ,并解答一些常见的疑难问题     

采矿神经网络模型在金川二矿区的开发应用

介绍神经网络的基本概念及其模型特征,叙述金川二矿区３ 个采矿神经网络模型的输入和输出信息的详细内容,使用方法,及在生产中的应用效果。     

Combination of Neuro-Fuzzy Network Models with Biological Knowledge for Reconstructing Gene Regulatory Networks

Inferring gene regulatory networks from large-scale expression data is an important topic in both cellular systems and computational biology. The inference of regulators might be the core factor for understanding actual regulatory conditions in gene regulatory networks, especially when strong regulators do work significantly, in this paper, we propose a novel approach based on combining neuro-fuzzy network models with biological knowledge to infer strong regulators and interrelated fuzzy rules. The hybrid neuro-fuzzy architecture can not only infer the fuzzy rules, which are suitable for describing the regulatory conditions in regulatory networks, but also explain the meaning of nodes and weight value in the neural network. It can get useful rules automatically without factitious judgments. At the same time, it does not add recursive layers to the model, and the model can also strengthen the relationships among genes and reduce calculation. We use the proposed approach to reconstruct a partial gene regulatory network of yeast. The results show that this approach can work effectively.     

Calibration of On-Demand Irrigation Network Models

In this study, a new procedure for calibrating on-demand irrigation network models was developed. This procedure used a new objective function called maximum data with a reasonable error (MDRE) for calibrating the network. It was compared with the two more commonly used objective functions in calibration procedures that are the simple least squares (SLS) and the maximum likelihood estimator for the heteroscedastic error case (HMLE). In order to carry out the calibration, a quasi-Newton optimization method was used having as variable the Hazen-Williams head losses coefficient (C). This procedure was applied to an on-demand irrigation network located in Tarazona de La Mancha (Albacete, Spain) where flow and pressure at hydrant level was measured. The calibration procedure using the MDRE objective function was applied considering all the pressure control points simultaneously and the obtained results were compared with the results of considering the pressure control points independently. Therefore, the effect of the location of the pressure control point was studied. Results showed that, when the proposed objective function was used, the root mean squared error (RMSE) comparing the measured and simulated data after calibration was lower than when the SLS or HMLE objective functions were used. The location of the pressure control points throughout the irrigation network could affect the results; therefore, it was more accurate to use all the control points simultaneously than independently in the calibration process.     

热轧窄带线粗轧平辊主传动控制系统

以马钢(合肥)钢铁有限责任公司热轧窄带钢生产线成功投产为基础,介绍了粗轧平辊大容量直流电机的传动控制系统的硬件配置、通讯方式及主要特点。分析阐述了晶闸管散热、12脉波整流供电回路及"以小拖大"驱动方式,通过实际应用证明,整个系统具有可靠性高、稳定性好、动态响应快等优点。     

Peer Academic Reputation in Elementary School: Associations With Changes in Self-Concept and Academic Skills.

The developmental significance of children's academic reputation among peers was examined in a longitudinal study of 400 children in Grades 3, 4, and 5. In the fall of Year 1, teachers rated children's academic skills and behavior, and peers provided nominations describing classmates' academic skills, social acceptance versus rejection, and aggressive behavior. In the fall and spring of Year 1, children provided reports of their academic self-concept, social self-concept, and global self-worth. In the fall of Year 2, teachers rated children's academic skills. Results indicated that 4 items assessing peer academic reputation formed an internally consistent scale that was correlated moderately and distinctively with teacher-rated academic skills. Peer academic reputation and teacher-rated academic skills each contributed independently to the prediction of fall-to-spring changes in children's academic self-concept. Peer academic reputation and academic self-concept contributed uniquely to the prediction of changes in teacher-rated academic effort and skills over a 1-year period. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

有线电视网作三网融合物理网的优势和问题

广播电视网、电信业务网与计算机网是信息产业发展的基础,三网融合则是现代信息技术发展的必然趋势,其最终的物理网络选择是三网融合中需要解决的关键问题之一。文章阐述了广播电视网中有线电视网络的重要地位。     

网络攻击与网络安全分析

计算机网络是把双刃剑,在带给我们快捷与方便的同时,也给我们带来了许多安全方面的烦恼,这几年计算机系统漏洞的发现速度加快,大规模攻击不断爆发,计算机网络安全状况不容乐观.目前的计算机网络攻击具有攻击源相对集中,攻击手段更加灵活,攻击对象的范围扩大等新特点.对网络安全的威胁主要表现在:非授权访问,冒充合法用户,破坏数据完整性,干扰系统正常运行,利用网络传播病毒,线路窃听等方面.这就要求我们对Internet互连所带来的安全性问题予以足够重视.     

Ergonomic Office Design and Aging: A Quasi-Experimental Field Study of Employee Reactions to an Ergonomics Intervention Program.

A naturally occurring quasi-experimental longitudinal field study of 87 municipal employees using pretest and posttest measures investigated the effects of an office workstation ergonomics intervention program on employees' perceptions of their workstation characteristics, levels of persistent pain, eyestrain, and workstation satisfaction. The study examined whether reactions differed between younger and older employees. Results revealed that workstation improvements were associated with enhanced perceptions of the workstation's ergonomic qualities, less upper back pain, and greater workstation satisfaction. Among those experiencing an improvement, the perceptions of workstation ergonomic qualities increased more for younger than older employees, supporting the "impressionable years" framework in the psychological literature on aging. Implications for human resources managers are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)