可视化技术在网络链接分析中的应用研究

介绍链接分析技术和可视化技术,讨论可视化技术在链接分析中应用的国内外发展现状、步骤和方法,对几个典型的可视化检索系统和链接分析工具中可视化链接分析的应用实例进行较细致地分析。最后,分析不足及未来可能的研究方向和可用的方法与技术,为开发功能强大的可视化链接分析工具提供支持。     

基于UAMRT的英汉翻译系统的设计与实现原理

本文提出了一种设计和实现英汉翻译系统的新方法。该方法以模板匹配替换通用算法 (UAMRT)为基础 ,通过结合句型分析算法和从句分析算法建立启发式搜索机制 ,实现从源语言句子到目标语言句子的自动翻译。它不仅能够合理地利用基于规则和基于例子的翻译系统的优点 ,而且能够在一定程度上克服它们的缺点。速度测试表明以该方法为基础实现的英汉翻译系统在P IV1 7G的计算机上的翻译速度每秒可以达到 130 0个单词左右 ;质量测试表明该系统具有较好的发展潜力     

搜索引擎Excite检索功能详述及评析

表述的重点在于通过对搜索引擎Excite工作原理的介绍及各个检索功能的分析，获得关于它的整体认识，希望此文对搜索引擎的发挥有些启示作用。     

柴油机性能研究中的频域分析方法

在频率域中对柴油机气缸压力、进排气压力进行了计算分析，阐明了上述气体压力信号的频域特征及其与柴油机热力过程之间的关系，并给出了频谱分析应用于柴油机性能改进研究的实例。     

信息查寻活动中的合作行为与合作式信息查寻

指出了传统信息查寻和情报检索研究只针对个体用户的行为,忽视查寻的社会情景以及用户之间的相互关系的问题。对信息查寻和情报检索中的合作行为进行了研究,介绍了合作系统的发展状况,并对今后的发展趋势进行了分析。     

关于网络信息分类组织研究中的几个问题

《中图法》不适于组织网络信息 ,应建立全国统一的网络信息分类法。编制网络信息分类法应摒弃以科学分类为依据的原则 ,必须把实用性和易用性放在首位。只有自然语言同人工语言相结合 ,才能编制出高质量的网络信息分类法。参考文献 35。     

走向家亡人散的一个加速度——试谈《抄检大观园》

抄检大观园是贾府衰亡过程中的重要事件,是贾府主子间内部矛盾的一次爆发,是一次有预谋、有组织地镇压大观园女奴的可耻行为,抄检过程中表现出贾府必然灭亡的历史命运,在艺术上,运用对比方法塑造人物、情节的波澜起伏和场面描写的戏剧性,都表现出作高超的艺术修养和才能。     

Hybrid index maintenance for contiguous inverted lists

Index maintenance strategies employed by dynamic text retrieval systems based on inverted files can be divided into two categories: merge-based and in-place update strategies. Within each category, individual update policies can be distinguished based on whether they store their on-disk posting lists in a contiguous or in a discontiguous fashion. Contiguous inverted lists, in general, lead to higher query performance, by minimizing the disk seek overhead at query time, while discontiguous inverted lists lead to higher update performance, requiring less effort during index maintenance operations. In this paper, we focus on retrieval systems with high query load, where the on-disk posting lists have to be stored in a contiguous fashion at all times. We discuss a combination of re-merge and in-place index update, called Hybrid Immediate Merge. The method performs strictly better than the re-merge baseline policy used in our experiments, as it leads to the same query performance, but substantially better update performance. The actual time savings achievable depend on the size of the text collection being indexed; a larger collection results in greater savings. In our experiments, variations of Hybrid Immediate Merge were able to reduce the total index update overhead by up to 73% compared to the re-merge baseline.

基于Peer-to-Peer的搜索引擎的发展

简单介绍了P2P技术及其应用方面,基于P2P的搜索引擎的发展现状,对传统的搜索引擎与基于P2P的搜索引擎进行了比较,并对基于P2P的搜索引擎目前存在的问题及发展趋势进行了探讨.     

Acquiring knowledge about human goals from Search Query Logs

A better understanding of what motivates humans to perform certain actions is relevant for a range of research challenges including generating action sequences that implement goals (planning). A first step in this direction is the task of acquiring knowledge about human goals. In this work, we investigate whether Search Query Logs are a viable source for extracting expressions of human goals. For this purpose, we devise an algorithm that automatically identifies queries containing explicit goals such as find home to rent in Florida. Evaluation results of our algorithm achieve useful precision/recall values. We apply the classification algorithm to two large Search Query Logs, recorded by AOL and Microsoft Research in 2006, and obtain a set of ∼110,000 queries containing explicit goals. To study the nature of human goals in Search Query Logs, we conduct qualitative, quantitative and comparative analyses. Our findings suggest that Search Query Logs (i) represent a viable source for extracting human goals, (ii) contain a great variety of human goals and (iii) contain human goals that can be employed to complement existing commonsense knowledge bases. Finally, we illustrate the potential of goal knowledge for addressing following application scenario: to refine and extend commonsense knowledge with human goals from Search Query Logs. This work is relevant for (i) knowledge engineers interested in acquiring human goals from textual corpora and constructing knowledge bases of human goals (ii) researchers interested in studying characteristics of human goals in Search Query Logs.