远程教学数字图书馆中基于MPEG-7的语音数据的组织索引

本文提出基于MPEG 7的教学语音内容的描述模式 ,它是语音数据的层次结构化组织和多维索引的重要依据。描述模式为用户提供了层次结构的浏览视图和导航机制 ,以及反映用户多角度观察和分析的多维索引 ,从而实现互操作性的基于内容的语音检索等服务。最后本文概要地分析了特征的自动提取和描述的自动生成技术。     

广州市创新驱动政策实施现状调查

以广州市2015 年新出台“创新驱动1+7 政策”为研究对象,针对政策的实施效果、落地程度、实施阻力等 实际问题,通过问卷调查和专场座谈的方式进行调研。研究结论：科技创新大会和“1+7 政策”知晓程度较高;创新主 体对创新驱动政策的偏好和认可度呈明显差异;科技企业发展瓶颈在于人才、市场和资金;科技金融政策缺乏必要的 支撑体系。对此,提出借助民间力量开展政策宣传、建立常态化的政策评估机制、以产学研搭建科技金融支撑体系等 建议。     

Online speech and democratic culture: a comparison of freedom of online speech between South Korea and the United States

Civil libertarian doctrine which was dominant during the twentieth century argued that the main goal of freedom of speech was to ensure that the public would be well-informed and actively engage in public deliberation. A literal extension of this claim to the Internet age often justifies the regulation of online speech under the assumption that harmful communication undermines the public interest. This study challenges civil libertarianism and proposes a new thesis of freedom of online speech, which posits that online speech should be understood in terms of a democratic culture where every individual participates freely and without restraints in the process of meaning making that constitute her/him as an autonomous individual. Based on such a theoretical concept, this study identifies three important aspects of online speech freedom – unfettered speech, anonymous speech, and participatory speech – and then compares the status of online speech between South Korea and the United States. This research suggests that a society should understand the unique nature of online speech and then arrange the legal system to fit into it.     

研究主题视域下零被引与高被引论文分析——以环境科学领域为例

[目的/意义]从主题视角对环境科学领域的零被引论文进行分析,对比零被引论文与高被引论文在文章内容、外在指标方面的不同,揭示零被引论文存在的原因。[方法/过程]首先,对来自Web of Science数据库的国内环境科学领域的260篇高被引论文、907篇零被引论文的摘要进行PLDA主题识别,然后通过主题相似度计算发现主题间的关联,以主题热度作为内部指标,发文时间、发文期刊作为外部评价指标,最后,把论文主题内容与外部指标结合进行零被引与高被引论文之间的相同主题、不同主题对比分析。[结果/结论]在研究主题相同情况下,期刊的影响因子大小是影响零被引论文的主要因素;在主题不同的情况下,论文研究的主题内容是导致零被引论文的主要原因。     

科技期刊“中介稿件”的识别及防范

分析中介稿件的信息特征,且与作者稿件的信息特征进行比较,进而提出中介稿件的识别与防范策略,即:根据稿件信息特征识别中介稿件;根据注册信息与稿件对应信息不一致识别中介稿件;通过签署协议警醒和监管作者;掌握证据投诉中介网站.     

How the Central Intelligence Agency recruited Arab Detroit: Government communication,interpellation and citizenship

In 2009, the Central Intelligence Agency (CIA) employed a multipronged communications campaign to encourage Arab Americans in Detroit, MI, to apply for employment. Adapting Althusser’s notion of interpellation, this article examines how this government agency’s communications exacerbated the conditional, incomplete status of Arab American citizenship in post-9/11 America. At this precarious time, facially inclusive gestures can be understood as exclusive practices. This beckons more scholarly attention to how government communication implicates citizenship.     

New Approaches to Spoken Document Retrieval

This paper presents four novel techniques for open-vocabulary spoken document retrieval: a method to detect slots that possibly contain a query feature; a method to estimate occurrence probabilities; a technique that we call collection-wide probability re-estimation and a weighting scheme which takes advantage of the fact that long query features are detected more reliably. These four techniques have been evaluated using the TREC-6 spoken document retrieval test collection to determine the improvements in retrieval effectiveness with respect to a baseline retrieval method. Results show that the retrieval effectiveness can be improved considerably despite the large number of speech recognition errors.     

"科学发展观与媒介化社会构建"系列报告之二我国受众的媒介角色认知与评价

受众对于媒介角色的认知及其评介是科学建构媒介化社会的重要参照.调查显示,受众对于媒介促进精神文明、物质文明建设等方面的作用趋于赞同,而不同层次的受众对于媒介的可信度和媒介能否解决现实问题的认知情况并不明朗.对于媒介在和谐社会构建中的角色承担,受众对不同的领域有不同的评价,也为信息传播与媒介发展提供了需要解决的一些领域.     

支持向量机在文本自动分类中的应用研究

针对数据挖掘中的文本自动分类问题,提出了一种基于支持向量机的分类方法。构造了可用于多个模式类识别的多层级连式SVM模型,该模型可完成对多个模式的分类识别。根据训练样本的分类体系完成对模型的构造之后,即可应用于实际文档的自动分类。文中给出了该模型的构造及应用的方法,用两种核函数作为内积回旋方案,以中国期刊网全文数据库部分文档数据为例验证了该方法的有效性。     

基于模式匹配的汉语同义词自动识别

同义词的自动发现和识别在信息检索领域有着重要的研究意义和应用价值。为了提高同义词自动识别的效率,本文提出了从词典释义中使用模式匹配方法提取同义词。该方法首先对词汇的释义方式进行分析,归纳总结出在词典释义中同义词出现的模式,进而利用模式匹配方法获取同义词。实验结果表明,利用模式匹配方法来自动发现同义词具有可行性和实用性。