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1.
Searching online information resources using mobile devices is affected by small screens which can display only a fraction
of ranked search results. In this paper we investigate whether the search effort can be reduced by means of a simple user
feedback: for a screenful of search results the user is encouraged to indicate a single most relevant document. In our approach
we exploit the fact that, for small display sizes and limited user actions, we can construct a user decision tree representing
all possible outcomes of the user interaction with the system. Examining the trees we can compute an upper limit on relevance
feedback performance. In this study we consider three standard feedback algorithms: Rocchio, Robertson/Sparck-Jones (RSJ)
and a Bayesian algorithm. We evaluate them in conjunction with two strategies for presenting search results: a document ranking
that attempts to maximize information gain from the user’s choices and the top-D ranked documents. Experimental results indicate
that for RSJ feedback which involves an explicit feature selection policy, the greedy top-D display is more appropriate. For
the other two algorithms, the exploratory display that maximizes information gain produces better results. We conducted a
user study to compare the performance of the relevance feedback methods with real users and compare the results with the findings
from the tree analysis. This comparison between the simulations and real user behaviour indicates that the Bayesian algorithm,
coupled with the sampled display, is the most effective.
Extended version of “Evaluating Relevance Feedback Algorithms for Searching on Small Displays, ” Vishwa Vinay, Ingemar J.
Cox, Natasa Milic-Frayling, Ken Wood published in the proceedings of ECIR 2005, David E. Losada, Juan M. Fernández-Luna (Eds.),
Springer 2005, ISBN 3-540-25295-9 相似文献
2.
随着船舶自动识别系统(Automatic Identification System,AIS)和电子海图信息与显示系统(Electronic Chart Displayand Information System,ECDIS)的出现及普及,使船舶交通管理系统(Ves-sel Traffic Service,VTS)对其辖区的航行船舶进行自动搁浅预警成为可能.针对预警自动化水平较低这一现状,提出搁浅预警(Search Area for Grounding A lert,SAGA)模型,通过判断船舶SAGA领域内最小水深是否满足安全要求来实现船舶搁浅预警. 相似文献
3.
直接体绘制算法可以准确表现出物体的内部信息,但由于其隐含表面绘制模式使得物体边界很难确定,通常很难获得层次清晰分明、空间感强的绘制效果。本文将直接体绘制技术和双目立体技术结合起来,提出基于立体视觉的体绘制方法,并对其中一些关键问题进行了讨论。 相似文献
4.
In this paper, we develop themes from complexity and chaos theory that help to explain the technological change process. We apply two quantifiers, correlation dimensions and Lyapunov exponents, to examine the signs and degrees of chaotic technological dynamics. To illustrate our ideas, we study the development of electronic displays from 1976 to 2010, using patent data. The results of the chaos model are matched against the profiles of patent citations. Our analysis contributes to the development of a chaotic model of technological change. 相似文献
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本文档简要介绍以嵌入式计算机PC104为硬件开发平台,基于DOS操作系统下的高分辨率图形显示设计。 相似文献
7.
Macromedia Flash Media Server(FMS)服务器平台中的共享对象可以利用多个客户机的SWF文件和本地或远端位置的永久性对象实现实时的数据共享。可将其应用在基于web的远程教学环境的构建和网络课件的制作中。文章介绍了共享对象的工作过程、data属性及读写方法、Sync事件处理器。并通过一个实例描述了共享对象的基本使用方法。 相似文献
8.
LOD(Levels of Details,细节层次)是解决大规模地形实时渲染的一项关键技术。将LOD应用于三维数字地球中,针对LOD在实时地形绘制、纹理与高程数据映射等方面进行了分析,在采用数据分块、动态LOD技术、动态纹理等技术的基础上实现了海量数据的快速漫游,得到实时显示效果。 相似文献
9.
展现是儿童在由教育者和受教育者共同组成的群体中自我表现自己;展示则是学校因儿童在教育生活中的表现而使其显现在他者面前。展示是以儿童展现、他者的存在、空间及某种标示为条件。展示的消极意义在于,它在昭示着同一性要求的同时,却极大地扼杀了儿童发展的个性与多样性。当展示在现有的条件下无法消除时,减少其消极影响的出路在于改变展示的方式,使其有利于儿童的个性发展。 相似文献
10.
汽车尾灯控制电路设计 总被引：1，自引：0，他引：1
以数字逻辑电路为基础,介绍了由门电路、译码器、触发器构成的汽车尾灯控制电路工作原理及设计思路,加深学生对数字电路有关知识点的理解。 相似文献