利用三角形法高校机房管理策略探讨

计算机教育在高等院校的教育中占据了愈来愈重要的位置,而随着计算机设备的不断更新换代,网络环境的日趋复杂多变,对高校计算机机房的管理提出了更高的要求,突破传统的机房管理模式,拓展新的管理方法成为高校机房管理的一个不可避免的问题。提出了利用三角形法管理高校机房的新观点,以期能提高高校机房的管理效能,使之更好地服务于日常教学和科研的需要。     

Working conditions in the engine department – A qualitative study among engine room personnel on board Swedish merchant ships

The specific problems associated with the work on board within the merchant fleet are well known and have over the years been a topic of discussion. The work conditions in the engine room (ER) are demanding due to, e.g. the thermal climate, noise and awkward working postures. The work in the engine control room (ECR) has over recent years undergone major changes, mainly due to the introduction of computers on board. In order to capture the impact these changes had implied, and also to investigate how the work situation has developed, a total of 20 engine officers and engine ratings were interviewed. The interviews were semi-structured and Grounded Theory was used for the data analysis. The aim of the present study was to describe how the engine crew perceive their work situation and working environment on board. Further, the aim was to identify areas for improvements which the engine crew consider especially important for a safe and effective work environment. The result of the study shows that the design of the ECR and ER is crucial for how different tasks are performed. Design which does not support operational procedures and how tasks are performed risk inducing inappropriate behaviour as the crew members’ are compelled to find alternative ways to perform their tasks in order to get the job done. These types of behaviour can induce an increased risk of exposure to hazardous substances and the engine crew members becoming injured.     

基于VB的考务管理系统的设计与实现

设计开发了一套基于校园网的教务管理信息系统,该系统的试题管理和事务管理两大子系统组成,功能较齐全,为教务部门提供了一个好帮手,同时也方便了教师和学生。对系统的结构,基本功能和具体实现方法作了介绍。     

利用网络克隆实现多机快速安装

通过对几款网络克隆软件的特点、使用方法进行比较,提出了适合学校公共计算机机房多机快速安装的方案．为学校公共计算机机房的维护和管理带来了方便。     

基于socket的简单聊天室的设计与实现

介绍了在Linux上用socket编程来设计并实现一个简单聊天室。首先选择了服务器的轮询工作方式,以满足多个用户进程的连接;然后从数据结构、模块开发和源码实现三个方面详细分析了聊天室的实现;最后将该聊天室与传统聊天室进行了比较,并指出该聊天室的优势所在。     

纳米材料SnO_2的室温固相合成及其气敏特性

以无机物SnCl4 ·5H2 O、Na2 CO3 (摩尔比 1:2 )为原料 ,室温下研磨 ,使其发生固相化学反应 ,制得SnO2 ,采用X -射线衍射技术 (XRD)和透射电子显微镜 (TEM)等测试手段对材料的物相和微观结构进行了分析 ,结果表明 ,所得产物为理论产物 ,且平均粒径约为 2 5nm ;采用HWC - 30A汉威气敏元件测试系统对材料的气敏性能进行了测试 ,结果表明 ,该材料制成的烧结型元件对可燃性气体有很高的灵敏度 ,通过控制工作温度可提高元件的选择性     

温控烧结法制备高温PTCR陶瓷

本实验以固相合成的(Ba_(0.6)Pb_(0.4))TiO_3为主要原料,在较宽的温度范围内(1280—1360℃)制得了Tc>320℃、室温电阻率低达几十Ω·cm、升阻差在五个数量级以上的PTCR材料。实验结果得出:采用高温快速升温、从烧结温度快速降温至某一温度并保温一段时间的温控烧结方法(TCS),有利于提高材料的性能。     

环氧复合材料低温固化剂研究进展

低温固化(固化温度低于100℃)可获得高尺寸稳定性、低成本、力学性能优良的环氧复合材料,室温储存期长的低温固化剂体系是低温固化环氧复合材料的关键。重点探讨了微胶囊型、潜伏性以及其它改性环氧低温固化剂,展望了其未来前景及发展方向。     

Wear performance of Ni/ZrO<Subscript>2</Subscript> infiltrated composite layer

The Ni/ZrO2 was used as raw materials to fabricate the surface infiltrated composite layer with 1-4 mm thickness on cast steel substrate through vacuum infiltrated casting technology. The microstructure indicated that the infiltrated composite layer included surface composite layer and transition layer. Wear property was investigated under room temperature and 450 ℃. The results indicated that the abrasion volume of substrate was 8 times that of the infiltrated composite layer at room temperature. The friction coefficient of infiltrated composite layer decreased with the increasing load. The wear resistance of infiltrated composite layer with different ZrO2 contents had been improved obviously under high temperature. The friction coefficient of infiltrated composite layer was decreased comparing with that at room temperature. The oxidation, abrasive and fatigue abrasion was the main wear mechanism at room temperature. Oxidation abrasion, fatigue wear and adhesive wear dominated the wearing process under elevated temperature.     

基于混料设计的泥炭腐植酸型煤粘结剂研究

以型煤试样的初始强度和常温强度作为泥炭腐植酸粘结剂提取能力的表征,研究了混合碱液对泥炭中腐植酸粘结剂提取率的影响。先通过单因素实验的方法确定NaOH的最佳加入量,然后在此最佳加入量的基础上,以NaOH、Na2CO3和Na3PO4为三因素做混料实验,采用全概率公式评分法对多指标实验数据进行分析处理,对分析处理后的综合指标进行回归分析,得到了综合指标的最优回归模型,以此求得三因素的最佳比例。研究结果表明,当NaOH、Na2CO3和Na3PO4加入总质量为泥炭的15%,且加入比例为2∶1∶0时,可获得最佳的腐植酸提取效果。