Exploring features for the automatic identification of user goals in web search

Queries submitted to search engines can be classified according to the user goals into three distinct categories: navigational, informational, and transactional. Such classification may be useful, for instance, as additional information for advertisement selection algorithms and for search engine ranking functions, among other possible applications. This paper presents a study about the impact of using several features extracted from the document collection and query logs on the task of automatically identifying the users’ goals behind their queries. We propose the use of new features not previously reported in literature and study their impact on the quality of the query classification task. Further, we study the impact of each feature on different web collections, showing that the choice of the best set of features may change according to the target collection.     

期刊的分类与图书馆管理方式管见

国内期刊分类目前尚无统一标准,或按介质分类,或按主管单位分类,或按质量分类。图书馆期刊分类管理应与图书馆同步加速现代化管理进程,加强文献的开发和利用,加强对期刊管理人员的教育和培养。     

论篮球战术思想

篮球战术思想既是对篮球具体技战术的概括与提炼 ,又是指导篮球比赛和实践时所用系统战术的自我提高与完善。在我国篮球战术研究相对滞后的情况下 ,全面梳理篮球战术思想 ,界定篮球战术思想的不同类别并展望篮球战术思想发展的态势 ,显得至关重要     

一种改进的基于信噪比的文本分类方法

改进了传统的信噪比文本分类方法。提出了一种改进的基于信噪比的文本分类方法。它考虑了禁用词的排除、近义词和同义词的合并以及特征项在文本中不同位置对文章分类的贡献不同。     

《数学评论》与数学教育文献

随着数学教育研究的日益深入,造成了数学教育文献量的不断增加,作为数学领域一种最重要的检索工具－《数学评论》,在2000年的主题分类中增加了“数学教育”这一大类,方便了数学教育文献的检索,同时也给广大数学教育工作者打了一针“兴奋剂”。     

论苏赋

文章分四个部分:首辨伪,认为《苏轼文集》所收苏赋27篇,有两篇非苏轼作品;次编年,考订了前人编年有待商榷之賦;次分体,认为苏賦诸体皆备,他以文赋闻名于賦史, 但他的多数赋仍是骈赋和律赋;最后是苏赋分类,认为苏赋题材十分丰富,含议政、纪游、吊古、咏物,苏轼不善饮酒,而咏酒赋特多。     

数字调制类型的识别及实现

通信信号的调制识别是目前研究的热点问题.本文给出一种新的数字调制信号识别方法.高速数字专用芯片ADSP2101是此方法具体实现的重要器件,这一方法在实际通信中有着广泛的应用.     

浅析英汉双关语的异同

从英汉双关语的定义、分类及修辞作用入手,对它们的基本特点进行对比分析,发现它们既有相同点,亦有不同之处。这些都折射出各自不同的文化特色。     

解读赫尔巴特德育思想

赫尔巴特的德育理论源于古典哲学,他建构了自己的道德观念,阐述了影响德性形成的因素,并提出了以德育为目的的训育。青少年的道德品质下降问题备受社会关注,批判与继承赫尔巴特的德育理论对今天的道德教育具有重要意义。     

The role of ethnicity in the attainment and experiences of graduates in distance education

In the UK, the attainment of White graduates (as measured by the class of honours that they have been awarded) tends to be higher than that of graduates from other ethnic groups. This is apparent, in particular, in graduates who have taken courses by distance learning with the Open University. Analysis of data from Open University graduates over three successive years yielded no evidence that the latter trend could be attributed to confounded demographic variables. A postal survey found little variation in perceptions of academic quality or reports of personal development among Open University graduates from different ethnic groups. Quantitative variations in the attainment of graduates from different ethnic groups are not necessarily reflected in qualitative variations in their experience of distance education.