数字图书馆的社会模拟技术研究

数字图书馆的非文献资源包括用户、用户产生的信息和用户行动,它们是社会网络、社会媒体与虚拟世界的元数据对象。在虚拟世界系统的基础上(含登记系统、地图系统、动态消息系统、快照系统和库存系统等),讨论数字图书馆能够以用户建模和信息系统模块来发展虚拟科研环境、虚拟校园和虚拟知识型社会等。     

PDC and Non-PDC fuzzy control with relaxed stability conditions for contintuous-time multiplicative noised fuzzy systems

This paper presents a relaxed scheme of fuzzy controller design for continuous-time nonlinear stochastic systems that are constructed by the Takagi–Sugeno (T–S) fuzzy models with multiplicative noises. Through Nonquadratic Lyapunov Functions (NQLF) and Non-Parallel Distributed Compensation (Non-PDC) control law, the less conservative Linear Matrix Inequality (LMI) stabilization conditions on solving fuzzy controllers are derived. Furthermore, in order to study the effects of stochastic behaviors on dynamic systems in real environments, the multiplicative noise term is introduced in the consequent part of fuzzy systems. For decreasing the conservatism of the conventional PDC-based fuzzy control, the NQLF stability synthesis approach is developed in this paper to obtain relaxed stability conditions for T–S fuzzy models with multiplicative noises. Finally, some simulation examples are provided to demonstrate the validity and applicability of the proposed fuzzy controller design approach.     

When the child gets in the news? A case study on the national written media in Turkey

The main purpose of this study is to analyze news stories regarding children in the national print media in the last five years using top eight newspapers in terms of circulation and evaluate these news stories based on the Convention on the Rights of the Child, which was issued by the UN and signed by Turkey. The research was undertaken as a case study. The study data were collected from top eight newspapers in terms of circulation between 2010 and 2014 in order to reveal when and how newspapers at national level represent children and the scientific content of impressions in the national media. Results show that children appear in the national media in mostly negative cases. In conclusion, it was observed in this study, children’s rights to life, development, protection, and participation were violated at both national and international levels. In this sense, news reflects the truth about “children’s rights violations”. However, the way that children appear in news and reflection in media constitute a secondary children’s rights violation.     

专利技术组合的应用及识别方法研究进展

[目的/意义] 对专利技术组合的应用及识别方法研究进展进行梳理,总结现有研究成果,分析现存问题,针对筛选与推荐实用专利技术的需求提出可改进的思路和方向。[方法/过程] 对专利技术组合进行概念界定,基于企业专利技术活动的需求归纳总结专利技术组合的应用方向;通过国内外文献调研对专利技术组合的识别方法进行分析评述。[结果/结论] 已有面向转化运营专利技术组合识别的研究相对较少且分散,工作量巨大,不能满足实用技术筛选和推荐的需求。未来研究思路：不同应用范畴下的专利技术组合识别方法有待进一步拓展,有针对性地筛选与抽取技术关键词以及引入知识组织的方法将可能是有效提高组合识别效率的重要途径,促进专利技术组合识别应用需要多种方法的优势互补。     

Assessing students’ critical thinking performance: Urging for measurements using multi-response format

The current paper discusses ambiguities in critical thinking assessment. The paper first reviews the components of critical thinking. It then discusses the features and issues of commonly used critical thinking tests and to what extend they are made compatible to the conceptualization of critical thinking. The paper argues that critical thinking tests utilizing a single multiple-choice response format measures only recognition or level of knowledge, and do not adequately capture the dispositional characteristics of test-takers. Multiple-choice response format does not reveal test-takers’ underlying reasoning for choosing a particular answer, nor does it reflect test-takers’ ability to think critically under unprompted situations. Whereas measurement that allows for responses in both multiple-choice and open-ended format makes it possible to assess individuals’ spontaneous application of thinking skills on top of their ability to recognize a correct response. Assessment consists of multi-response format should be pursued for effective evaluation of students’ critical thinking performance.     

千禧年初复合图书馆的服务及发展策略

在迎接新千禧的前后数年之间,大多数图书馆必须同时承担数位(即数字)图书馆和传统图书馆的社会功能与角色;图书馆员也必须同时熟悉传统典藏与数位典藏,并要提供具有传统服务与数位服务两种性质的服务。     

一类非线性系统稳定性的一个判据

利用向量形式的Bellman不等式获得一类非线性系统＝A（t，x）x零解稳定性的一个判据。     

一批西汉珍贵文物回归

2006年初，美籍华人范世兴、邓芳夫妇在互联网上看到有几家美国古董店出售中国汉代文物，出于对中华民族传统文化的珍爱，他们及时与汉阳陵考古陈列馆取得联系。初步确认了文物的真伪与时代后，范世兴、邓芳夫妇立即对即将出售的31件典型文物进行订购，同时主动联络旅居国外的爱国侨胞黄翔华、刘苹、邓清、李涛、陈勇、蔡明奇、王雷、黄岚、     

一个逼近方程解的迭代法

利用泰勒展开理论,给出一个逼近方程f(x)=0的解的迭代方法,并证明了迭代收敛,且收敛速度比牛顿迭代法快得多。     

基于复合词生成的网络热点话题识别及描述算法

[目的/意义]在海量网络新闻和微博等新媒体文本中自动识别网络热点话题并抽取有意义词串来描述热点事件,对自动识别和描述网络舆情具有重要的研究意义。[方法/过程]在现有热点描述词抽取方法中,利用关联规则或多元词组合方法在抽取过程中存在噪音词较多和特征词语义被放大或转移等问题。本文提出一种基于复合词生成的描述词抽取方法,在所提取的语义更为精确的描述词集合上使用一趟聚类算法对新闻文本进行聚类,自动识别网络热点话题并对热点话题进行排名。[结果/结论]对腾讯新闻事件文本数据集所做的实验结果表明,本文所提出的方法较传统的词特征抽取方法在聚类结果上具有更好的话题簇识别能力和簇描述能力。