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.     

知识地图模型及其在教学资源导航中应用研究

数字化学习时代,随着教学资源爆炸式增长,学习者的知识过载问题日益突出。该文针对数字化学习中教学资源的知识化组织和可视化导航与检索问题进行了研究,首先构建了知识地图与资源导航模型,并以此为基础,实现教学资源实体向知识本体的映射;其次,基于知识地图模型,构建学生知识框架,并进行知识可视化;最后,设计与实现了基于知识地图的资源导航与检索系统,基于知识地图的知识隐性关联检索与推荐相关教学资源,实现学习者的个性化推荐与导航。     

Google Book Search API在Web OPAC书目查询服务中的应用

通过使用Google Book Search API中的图书搜索链接和嵌入式浏览器API,在Web OPAC书目查询服务中嵌入Google图书搜索引擎进行图书搜索,可以增强Web OPAC书目查询服务功能,从而为快速检索信息提供便利。     

NSTL网站的营销策划

NSTL作为我国国家科技文献平台的核心,通过其中心网站、镜像站点及服务站点,面向中国提供馆藏文献的查询、检索、全文提供和各项电子信息服务。虽然NSTL网站资源丰富,服务项目众多,但使用率不高。为了让尽可能多的潜在用户了解并访问NSTL网站,有必要对NSTL网站进行全方位宣传推广。文章就NSTL网站的宣传推广提出搜索引擎推广、资源合作推广、电子邮件推广、学术会议推广、设奖学金及科研项目推广等全方位的营销筹划方案。     

基于通用搜索引擎的深层网络表面化方法研究

在现有相关研究的基础上,对基于通用搜索引擎的深层网络表面化方法的基本原理进行分析,对表单域取值范围的确定、查询处理、查询结果的超链接设置等与深层网络表面化相关的若干关键问题进行探讨。     

用FCA对搜索结果进行分类*

用形式概念分析的方法，对用户的搜索结果进行自动分类研究，经过建立模型进行实验证明，用形式概念的方式可以对搜索结果进行自动分类，用户可以更便利更准确地使用搜索结果，有效提高查找信息效率。     

优化电子期刊网站检索效率的难点解析

检索效率是关系到电子期刊网站生死存亡的一个问题。如何提高检索效率, 是编程人员需要着重考虑的要点。笔者就自己开发网站的一些切身体会, 在本文中对几个有关提高电子期刊网站检索效率的难点问题进行剖析, 希望抛砖引玉, 与业内人士共同探讨。