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和传统的结构化设计技术和面向对象的程序设计技术相比,组件化程序设计更注重应用系统的全局,要求全方位地考察应用系统,对复杂的应用进行切分,分成一些独立的组件,而且这种切分要尽可能地符合系统的应用逻辑和业务要求。本文采用组件化技术对组态软件中的报警事件进行切分,设计报警、事件模块,讨论报警、事件组件对象的接口结构、基本构成等问题。介绍了该报警事件模块作为独立的组件集成到NetCon网络化可视监控组态软件的应用。 相似文献
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一种新的网络告警相关系统的体系结构 总被引:1,自引:0,他引:1
事件相关通过对事件在时间和空间上进行相关处理,对告警进行事件关联,就可以改变故障管理中“数据丰富,信息贫乏”的局面,有效地进行故障定位。基于数据挖掘方法,给出了一种新的告警相关系统框架,根据时序关系,自动找出隐藏在大量事件中的规律性,形成关联规则,解决知识获取这一瓶颈。它克服了传统事件关联方法的缺点,不仅可以自主获取先验知识,而且解决了多故障定位问题,实现了对未来业务障碍的预测。 相似文献
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基于事件的设计与控制技术已经引起人们的广泛关注,其基本思想就是引入与系统输出相关的运动参考变量(action reference),在任意时刻使系统给定量的输入以及系统的设计都转化为这个参考变量的函数,使系统的设计部分与控制器一样成为系统的决策部件,从而使系统具备处理突发性、不确定性事件的能力,可以根据系统的实际输出来实时、自动地调整系统的输入,实现对系统的实时控制.机器人系统是一个智能控制系统.机器人间的协调协作是其智能性的主要表现.本文首先对基于事件的控制理论及其发展做了回顾,然后介绍了基于事件的控制技术在机器人队形保持、机器制造、多机器人协作等系统智能控制中的应用,实验证明该方法可以取得很好的智能控制效果,提高系统的控制性能.最后探讨了这一研究领域的发展方向. 相似文献
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Storyline-based summarization for news topic retrospection 总被引:2,自引:0,他引:2
Electronics newspapers gradually become main sources for news readers. When facing the numerous reports on a series of events in a topic, a summary of stories from news reports will benefit news readers in reviewing the news topic efficiently. Besides identifying events and presenting news titles and keywords the TDT (Topic Detection and Tracking) techniques are used to do, a summarized text to present event evolution is necessary for general news readers to review events under a news topic. This paper proposes a topic retrospection process and implements the SToRe (Story-line based Topic Retrospection) system that identifies various events under a news topic, and composes a summary that news readers can get the sketch of event evolution in the topic. It consists of three main functions: event identification, main storyline construction and storyline-based summarization. The constructed main storyline can remove the irrelevant events and present a main theme. The storyline-based summarization extracts the representative sentences and takes the main theme as the template to compose the summary. The storyline summary not only provides readers enough information to understand the development of a news topic, but also serves as an index for readers to search corresponding news reports. Following a design science paradigm, a lab experiment is conducted to evaluate the SToRe system in the question-and-answer (Q&A) setting. The experimental results show that SToRe enables news readers to effectively and efficiently capture the evolution of a news topic. 相似文献
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M. Tamer Özsu Duane Szafron Ghada El-Medani Chiradeep Vittal 《Multimedia Systems》1995,3(5-6):182-203
We describe the design of a multimedia database management system for a distributed news-on-demand multimedia information
system. News-on-demand is an application that uses broadband network services to deliver news articles to subscribers in the
form of multimedia documents. Different news providers insert articles into the database, which are then accessed by users
remotely, over a broadband, asynchronous transfer-mode (ATM) network. The particulars of our design are an object-oriented
approach and strict adherence to international standards, in particular the Standard Generalized Mark-up Language (SGML) and
Hy-Time. The multimedia database system has a visual query facility, which is also described in this paper. The visual query
interface provides three major facilities for end users: presentation, navigation, and querying of multimedia news documents.
The main focus, however, is the querying of multimedia objects stored in the database. 相似文献
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电子新闻管理系统的研究 总被引:5,自引:0,他引:5
本文简要介绍和分析电子新闻系统的工作原理和电子新闻服务器的系统结构,阐述了电子新闻管理系统在电子新闻服务器中的地位和作用,提出电子新闻管理系统的目标及管理活动,给出一个新闻管理系统的详细设计方案。 相似文献
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目前,事件抽取的流行方法是以事件元素或触发词进行驱动,但该方法容易导致正反例不平衡,且在语料库规模较小时存在一定的数据稀疏问题。提出了一种基于事件实例驱动的事件抽取方法。首先,从文档句子中抽取出刻画一个事件发生有代表性的特征,构成候选事件实例表示;其次,通过二元分类器对新闻文本中的事件实例与非事件实例进行分类;最后,对事件实例采用基于层次聚类的k-mcdoids算法完成事件抽取。该方法不仅克服了正反例失衡以及数据稀疏问题,而且解决了预先定义事件类别的局限性。实验结果验证了该方法的有效性,对比传统方法,事件抽取的准确率与召回率均获得了显著的提高。 相似文献
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User Modeling for Adaptive News Access 总被引:16,自引:0,他引:16
We present a framework for adaptive news access, based on machine learning techniques specifically designed for this task. First, we focus on the system's general functionality and system architecture. We then describe the interface and design of two deployed news agents that are part of the described architecture. While the first agent provides personalized news through a web-based interface, the second system is geared towards wireless information devices such as PDAs (personal digital assistants) and cell phones. Based on implicit and explicit user feedback, our agents use a machine learning algorithm to induce individual user models. Motivated by general shortcomings of other user modeling systems for Information Retrieval applications, as well as the specific requirements of news classification, we propose the induction of hybrid user models that consist of separate models for short-term and long-term interests. Furthermore, we illustrate how the described algorithm can be used to address an important issue that has thus far received little attention in the Information Retrieval community: a user's information need changes as a direct result of interaction with information. We empirically evaluate the system's performance based on data collected from regular system users. The goal of the evaluation is not only to understand the performance contributions of the algorithm's individual components, but also to assess the overall utility of the proposed user modeling techniques from a user perspective. Our results provide empirical evidence for the utility of the hybrid user model, and suggest that effective personalization can be achieved without requiring any extra effort from the user. 相似文献
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运用现代信息处理技术建立一个从获取新闻源、进行信息处理、运用文本挖掘技术对信息进行分析的系统模型。该系统模型是为了最终实现能够自动化获取新闻信息,并且可以对网络中的新闻进行自动分类和聚类,为用户推荐热门信息,描述某个热门信息在时间轴上的演化进程;协助用户以及某些机构去认识和了解网络中的信息演变进程。热点新闻信息挖掘研究的主要目的在于:可以使用户终端更全面更快地知道和了解所关心的新闻信息及其整体的发展方向;网站的维护者可以依据分析结果来更好地设计网站内容以迎合用户的最新喜好,以便较大地提高网站的质量;新闻热点信息的挖掘模型也可以给互联网演变研究给予一些帮助,使网络监督者可以更好地对网络内容进行引导和控制。 相似文献
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企业信息发布系统是针对企业发布时效性较强的多类型新闻信息而开发,此系统可发布多类新闻信息,如企业新闻、行业新闻等,管理员还可通过后台添加、修改和删除新闻信息,其任务是实现企业信息的自动发布和管理。详细论述了企业信息发布系统开发的工具、基本原理和设计过程、系统开发过程中涉及JavaBean和JSP的使用技巧及常用的应用服务器的开发模式。 相似文献