Analysis of Statistical Question Classification for Fact-Based Questions   总被引：1，自引：0，他引：1  

Donald Metzler  W. Bruce Croft 《Information Retrieval》2005,8(3):481-504

Question classification systems play an important role in question answering systems and can be used in a wide range of other domains. The goal of question classification is to accurately assign labels to questions based on expected answer type. Most approaches in the past have relied on matching questions against hand-crafted rules. However, rules require laborious effort to create and often suffer from being too specific. Statistical question classification methods overcome these issues by employing machine learning techniques. We empirically show that a statistical approach is robust and achieves good performance on three diverse data sets with little or no hand tuning. Furthermore, we examine the role different syntactic and semantic features have on performance. We find that semantic features tend to increase performance more than purely syntactic features. Finally, we analyze common causes of misclassification error and provide insight into ways they may be overcome.  相似文献   

基于用户自然标注的TF-IDF辅助标引算法及实证研究     

陈白雪  宋培彦 《图书情报工作》2018,62(1):132-139

[目的/意义] 从用户角度出发,研究基于用户自然标注的TF-IDF辅助标引算法。[方法/过程] 首先以核心期刊论文中作者标注的关键词和分类号为源数据,通过对关键词词频进行统计,使用TF-IDF算法构建用户标注词表、形成标引知识库,然后通过IK Analyzer分词软件对待标引的科技项目数据进行切词和停用词处理,进而使用TF-IDF算法和位置加权算法提取科技项目数据的特征词,最终实现对科技项目数据进行关键词和分类的同步标引。[结果/结论] 实验结果表明,机标关键词与人标关键词的相似比在60%以上的科技项目数据占总数的68.1%,机标分类号与人标分类号前三位一致的占总数的83.9%,结果表明基于用户自然标注数据并采用TF-IDF算法在关键词和分类标引方面是可行的。  相似文献   

网络舆情场中信息受众观点测度的机理及路径分析     

宋先智  黄微  高俊峰 《图书情报工作》2018,62(2):100-107

[目的/意义]整合定性与定量的舆情研究视角,统一多模态研究对象,实现网络舆情信息受众的观点测度,可修复网络舆情分析与治理的理论与实践裂痕。[方法/过程]通过引入网络舆情场的概念,对网络舆情信息受众、受众观点测度的内涵进行诠释,就网络舆情场与信息受众观点测度的逻辑关系加以辩证讨论。[结果/结论]提出网络舆情场内舆情受众观点测度机理和具体测度路径,为后续网络舆情场中的网络舆情信息分析、多维度信息受众观点测度,受众认知规律发现,网络舆情监督和管控限制等层面的研究做相应铺垫。  相似文献   

公共档案馆微信公众平台服务质量影响因素研究   总被引：2，自引：1，他引：1  

宋雪雁  朱立香  房梦莎  邓君 《图书情报工作》2018,62(1):15-23

[目的/意义] 从用户感知的角度,构建公共档案馆微信公众平台服务质量影响因素模型,为公共档案馆服务质量优化奠定基础。[方法/过程] 通过问卷调查构建公共档案馆微信公众平台服务质量影响因素模型,使用SPSS软件,用探索性因子分析方法对假设模型进行检验,根据结果对假设模型进行修正,并对修正后的影响因素模型进行讨论。[结果/结论] 从用户感知角度全面综合分析微信公众平台上公共档案馆服务质量影响因素的构成,主要包括服务过程与系统运行、用户特征与费用、档案内容的内部特征、档案内容的外部特征和公众平台界面设计5个维度以及服务交互性等25个影响因素。  相似文献   

基于知识治理的公共档案馆服务质量优化机制研究     

宋雪雁  朱立香  盛盼盼  孙振嘉 《图书情报工作》2018,62(1):40-45

[目的/意义] 在公共档案馆服务质量优化中引入知识治理理论,使得复杂的服务质量优化问题获得更本质的理解和更有效的解决途径,为公共档案馆服务质量和服务能力提升提供参考。[方法/过程] 以知识治理理论为支撑,对公共档案馆服务质量优化进行分析与探讨,设计公共档案馆服务质量优化机制。[结果/结论] 通过借鉴和探析知识治理机制,构建公共档案馆服务质量影响因素优化机制,主要包括优化的环境、优化的目标、优化内部动能（治理机制）、优化外部动力和优化过程五个部分。  相似文献   

Social Comparisons and Need Fulfillment: Interpreting Video Game Enjoyment in the Context of Leaderboards     

John A. Velez  David R. Ewoldsen  Michael D. Hanus  Hyunjin Song  Jonathan A. Villarreal 《Communication Research Reports》2018,35(5):424-433

This study examines how social comparison information provided by video game leaderboards may influence players’ retrospective judgments of autonomy, competence, and relatedness need fulfillment. Participants played a video game and were randomly assigned to receive no postgame feedback or were shown a leaderboard that placed them in the top or bottom quartile of players. Results indicate downward social comparisons increase enjoyment by increasing competence and relatedness perceptions. However, upward comparisons did not have an opposite effect, nor did either type of social comparison influence players’ autonomy perceptions. Implications for applying Self-Determination Theory to video game enjoyment in the context of social comparison feedback is discussed.  相似文献   

Sustainability of independent community archives in China: a case study     

Zhiying Lian  Gillian Oliver 《Archival Science》2018,18(4):313-332

There are three models for community archives in China. The first one is where community archives are kept in government-funded/government-established museums or archives. The second is where community archives are kept by scholarly organizations such as universities. The third involves the community establishing its own archive. This last model is very unusual in China. The PiCun Culture and Art Museum of Migrant Labor (PCMML) provides an example of this model as it is the only independent community archives focusing on migrant workers in China. This paper explores the emergence and development of PCMML, its impact on community members and challenges faced including funding and staffing, but also those unique to China—PCMML is greatly influenced by a range of national and local government policies and regulations. Conclusions are that survival strategies for independent community archives in China are dependent on three dimensions: the community itself, society and the government. Cultural consciousness of the community is the premise for the establishment and sustainability of independent community archives, and independent community archives can be the public space to cultivate cultural consciousness of community members and thus activates community members’ agency to document, preserve and disseminate their own history. At the same time, independent community archives also need to engage with broader society to avoid involution and gain support and understanding. Independent community archives are constrained by government policies and regulations, so it is essential for them to develop strategic relationships with government.  相似文献   

An Investigation of Textbook Vetting and Evaluation Process in Tanzania     

Daniel C. Rotich  Emily J. Kogos  Zamda R. Geuza 《Publishing Research Quarterly》2018,34(1):96-109

Textbook vetting and evaluation process intends to ensure that the materials provided are relevant, of the required quality, suitable ad would enhance learning efficiency and effectiveness. The paper investigates the role of publishers and Tanzania Institute of Education (TIE) in the textbooks vetting and evaluation process; examines factors used to vet, evaluate and approve primary and secondary school textbooks in Tanzania and proposes Strategies that would enhance the textbook vetting, evaluation and process. The study used a mixed method research design. Respondents were selected educational publishers; MoEVT, Baraza la Kiswahili Tanzania, TIE, and Publishers Association of Tanzania. Questionnaire and semi- structured interview were used to collect data which were analysed qualitatively and quantitatively. Major findings of the study were; textbooks vetting and evaluation process is not professionally conducted although standard criteria have been established; there is not well established roles among key players involved in the vetting and evaluation process leading to conflict of interest between TIE and the publishers. The study recommends establishing an independent professional evaluation board and a well-defined timetable and effective communication among various players; enacting a book policy and adopting a limited multiple-textbook publishing system.  相似文献   

Modern Language Association: The MLA Handbook, 8th edition     

Gretchen Webster 《Publishing Research Quarterly》2018,34(1):152-153

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The Motivations of Book Publishers in Germany and Australia: An Empirical Comparison     

Albert Martin  Susanne Bartscher-Finzer  Anne Richards 《Publishing Research Quarterly》2018,34(1):69-88

Our study compares the motivations of Australian and German book publishers. The results demonstrate remarkable similarities, but also a significant difference regarding the effects of the publishers’ self-concept. In the German case the publishers with a dominant economic orientation are more proactive than the publishers with a dominant cultural orientation. In the Australian case, this correlation does not exist. The same difference holds for the relationship between the economic orientation and extrinsic motivation. We discuss these results and examine empirical evidence and theoretical suggestions to explain the differing findings. The data stem from surveys conducted in the two countries with responses of 196 (Germany) and 54 publishers (Australia).  相似文献