SLPC*E型自整定调节器功能讨论

对ＳＬＰＣＥ型自整定调节器的两个特殊功能进行了讨论,即专家自整定系统（简称ＳＴＣ）功能和可变型设定值滤波（简称ＳＶＦ）功能,将数字ＰＩＤ控制方法的专家系统技术融合在一起,从模仿人整定参数的判断推理决策入手,以经典的Ｚｉｅｇｌｅｒ Ｎｉｃｈｏｌｓ整定规则为基础,利用实际控制信息,将操作者的操作经验技巧归纳为一系列整定规则,运用到不同的对象模式,从而达到系统的最优控制。     

单元机组中按给定模型实现机炉负荷协调的设计方法

就目前看,前馈——反馈复合控制系统仍是单元机组实现机炉负荷协调控制的基本型式,但设计方法还不甚完善。本文选取协调关系以Moore系统为基础,依据解耦理论建立了单元发电机组按给定模型实现机炉负荷协调的设计方法。设计实例及其仿真结果表明,这个设计方法是合理、可行的。     

3ds Max模型导入Quest 3d材质出错的解决方法

简单介绍了以3ds Max为基础建立的模型导入Quest 3d后、模型材质丢失、白亮的解决方法。以电气按钮开关为例,分别从开关的建模过程、导出导入设置和导出插件入手,针对不同情况,提供了不同的解决方法,并介绍了各种方法所应注意的问题。     

Goal setting outcomes: Examining the role of goal interaction in influencing the experience and learning outcomes of video game play for earthquake preparedness

Video game goals are important features of video games. Player’s interaction with goals can not only shape the gaming experience by evoking cognitive and affective reactions in players, but also lead to learning outcomes. However, there are few empirical studies on the effects of interacting with game goals, and no previous research has manipulated goal setting. In two experimental studies, participants were randomly assigned to one of the following five conditions: self-set goal repetitive play, assigned goal repetitive play, no-set goal repetitive play, no-set goal single play, and no play. Results show that playing earthquake preparedness video games generates significant learning outcomes; playing repeatedly with self-set goals yields greater learning compared to playing once with no-set goals or not playing; and cognitive reactions mediates the relation between goal interaction and learning. Implications of the results for the design and evaluation of future video games for learning are explored.     

Goal Setting and Trust in a Security Management Context

ABSTRACT

Information security can be viewed as the efficient control of uncertainty arising from malicious acts intended to exploit valuable assets and in the context of information systems the valuable assets under consideration are data. A large part of information security approaches is technical in nature with less consideration on people and organizational issues. The research presented in this paper adopts a broader perspective and presents an understanding of information security in terms of a socio-organizational perspective. In doing so, it uses the goal-setting approach to identify any possible weaknesses in security management procedures in relation to trust among the members of information technology groups in communicating efficiently security risk messages. Data for the research were collected through in-depth interviews within three case studies. Interview results suggest that goal setting and trust are interrelated in managing information security. The research contributes to interpretive information systems with the study of goal setting and trust in a security management context.     

行程控制的研究及其Matlab仿真

文章介绍了主井提升系统中三段式S型速度给定的数学模型,基于Matlab/Simulink构建了其仿真模型,给出了仿真结果。通过分析仿真结果表明,该种模型的S型速度给定方式停车准确,并且提升效率高,具有很好的应用价值。     

地铁电空制动控制试验台的研制与设计

利用虚拟仪器技术,建立地铁电空制动控制试验台制动实验台,对所研发的制动系统进行性能检测;介绍了该系统的结构、功能和系统的软硬件构成;重点论述如何利用Labview虚拟仪器软件集成CAN通讯卡、数据采集卡实现工况设置、数据采集、数据发送、数据记录;此试验台可以对整个制动过程进行仿真,还可以进行电空转换装置性能的检测;该试验台的成功应用表明,虚拟仪器技术优于传统监控系统的实现方法,具有一定的推广价值和广阔的应用前景。     

铝板带材厚度和板形设定补偿解耦控制策略

在铝薄板带材冷轧生产过程中,板厚控制和板形控制本质上都是对轧制过程中有载辊缝的控制,两者存在很强的耦合关系.针对板厚板形控制系统存在耦合问题,提出板厚板形解耦设定补偿思想,包括预设定补偿控制和自适应穿带解耦控制.前者是解决设定过程中弯辊力对板厚板形耦合系统的影响;后者是针对穿带过程中轧制力预报不精确的板厚板形解耦方法.仿真结果及现场应用表明,解耦设定补偿提高了板厚板形的控制精度,满足了铝带板质量综合控制的要求.     

“通用试题库计算机管理系统”的开发与研究

“通用试题库计算机管理系统”由众多符合 WINDOWS标准的窗体模块和标准模块构成 .采用面向对象的程序设计方法 (OOP)、数据库技术、和图文并茂的多媒体技术来实现计算机系统自动进行试题库的建立 ,试卷的抽取、排版和打印     

使用本地组策略保护Windows XP系统的工作环境

通过修改WindowsXP操作系统中的本地组策略编辑器中的计算机设置和用户设置,可以方便地保护我们的电脑工作环境,与修改注册表相比方便了很多。本文举例说明WindowsXP本地组策略的强大功能。