基于模糊神经网络的高炉热风炉智能监控系统

针对热风炉燃烧控制的特点,将模糊控制技术与神经网络技术相结合,提出一种基于模糊神经网络的热风炉燃烧控制方法。     

基于模糊PI控制的交流调速系统研究

传统PI控制器以固定不变的PI参数去处理变化多端的动态过程,很难满足各种工况下的性能指标。针对这一问题,本文将模糊控制理论引入到交流调速系统的PI控制器中,实现PI参数的实时调整,显著地改善调速系统的动态性能。仿真实验表明,在同等实验条件下,模糊PI控制的动态性能优于传统PI控制的性能。     

Sorcery: Overcoming deceptive votes in P2P content sharing systems

Deceptive voting behaviors of malicious users are known as the main reason of causing content pollution in Peer-to-Peer (P2P) content sharing systems. Due to the nature of P2P overlay network such as self-organization and anonymity, the existing methods on identifying deceptive votes are not effective, especially for collusive attackers. This paper presents Sorcery, a novel active challenge-response mechanism based on the notion that one side of interaction with the dominant information can detect whether the other side is telling a lie. To make each client obtain the dominant information, our approach introduces the social network to the P2P content sharing system; therefore, clients can establish the friend-relationships with the users who are either acquaintances in reality or those reliable online friends. Using the confidential voting histories of friends as own dominant information, the client challenges target content providers with the overlapping votes of both his friends and the target content provider, thus detecting whether the content provider is a deceptive user. Moreover, Sorcery provides the punishment mechanism which can reduce the impact brought by deceptive voting behaviors, and our work also discusses some key practical issues. The experimental results illustrate that Sorcery can effectively overcome the problem of deceptive voting behaviors in P2P content sharing systems, and work better than the existing reputation models.     

Personalized text snippet extraction using statistical language models

In knowledge discovery in a text database, extracting and returning a subset of information highly relevant to a user's query is a critical task. In a broader sense, this is essentially identification of certain personalized patterns that drives such applications as Web search engine construction, customized text summarization and automated question answering. A related problem of text snippet extraction has been previously studied in information retrieval. In these studies, common strategies for extracting and presenting text snippets to meet user needs either process document fragments that have been delimitated a priori or use a sliding window of a fixed size to highlight the results. In this work, we argue that text snippet extraction can be generalized if the user's intention is better utilized. It overcomes the rigidness of existing approaches by dynamically returning more flexible start-end positions of text snippets, which are also semantically more coherent. This is achieved by constructing and using statistical language models which effectively capture the commonalities between a document and the user intention. Experiments indicate that our proposed solutions provide effective personalized information extraction services.     

基于MATLAB的自校正PID控制研究

针对常规PID的调节器在线参数整定时十分困难,以及不能够根据对象特性的变化做出相应调整的缺点。本文将自适应控制思想和PID控制器相结合,设计了一个自校正PID控制器。运用MATLAB的控制箱及其有关命令,进行了仿真。仿真表明,该控制器比常规PID的一些控制性能效果要好,具有一定的实用价值。     

电磁式爬壁机器人平台

本文介绍了一种新型电磁式爬壁机器人平台。机器人平台从客观需求出发,利用电磁铁可以吸附铁质物体的原理,实现机器人在铁质壁面上竖直攀爬。机器人平台以单片机为控制核心,控制四只仿生脚的行动和电磁铁的吸附,由无线控制器实现远程控制。平台搭载多种传感器,以检测机器人周围的环境状态,并应用无线传输技术,将传感器监测数据时时传回控制电脑。还可由电脑控制,利用机器人上加装的机械臂,完成简单操作。本项目作品可以应用于强热辐射、浓烟、污染气体等复杂环境的场所实施远程测控,也可以应用于船体、高炉检测等方面。     

基于K-近邻法的股价曲线的模式识别分类研究

本文将模式识别分类技术应用于股票市场进行搜索选股。本项目采用股票价格走势来构造特征空间,依据样本股票价格走势类型对股票市场上的所有股票进行模式识别分类,并将所获得的分类结果中的第一类股票作为搜索选股的目标股票。通过对沪深两市股票进行的实证研究分析,结果表明:采用模式识别分类技术依据股票价格走势进行搜索选股是可行的,具有良好的实时性和较高的针对性,实用性较强,并可进一步改进。     

多人实时协同设计在虚拟家装系统中的研究与实现

本文主要介绍了基于计算机支持下的协同技术中的多人实时协同的算法和理论,以及多人协同模块在虚拟家装系统中的具体实现,令分布在不同地域的普通用户在同一时间浏览、设计同一个户型的任意部分,提高了虚拟家装系统的设计效率,增强了用户对软件的应用体验,带来了巨大的经济效益。     

双CAN总线接口在ARM上的实现

基于高级精简指令微处理器（ARM）技术的处理器已经普遍应用于工业控制、汽车电子等各个领域。区域网络控制器（CAN）总线也已广泛应用于这些领域,但大多数的ARM9系列芯片还没有在片内集成CAN总线的控制器,需要在板级进行扩展。选用SJAl000器件作为CAN总线控制器,详细论述了在ARM系统中进行双CAN总线接口扩展的实现方法。     

ASP.NET中实现数据分页的几种方法

ASP.NET是一种服务器端制作动态WEB页的全新编程手段。该文讨论了在ASP.NET框架下对WEB数据库几种实现分页显示的方法。对利用自带分页功能的数据控件(如:DataGrid)和对于没有自带分页功能的控件(如:DataList)进行分页分别结合实例进行了详细的阐述。