农村中小学布局调整政策的历程、反思与走向

农村中小学布局调整有利于优化农村教育资源配置,实现优质教育资源共享,促进农村义务教育持续、健康发展。从教育政策的角度,通过回顾中国改革开放至今学校布局调整的主要历程,反思目前布局调整中的主要问题以及展望中小学布局调整政策的走向,对今后更加科学、合理地制定学校布局调整政策是具有重要意义的。     

中国新西兰学前教育本科课程设置比较研究——以成都大学学前教育学院和新西兰怀卡托理工学院教育学院为例

该研究通过对成都大学学前教育学院和新西兰怀卡托理工学院教育学院学前教育本科的课程设置进行比较分析,探讨中新两国学前教育本科专业在人才培养目标、课程构成、课程目标、课程实施等方面的差异.结果显示中国学前教育本科课程设置在人才培养目标方面同新西兰相比呈现出多元性,两国课堂教学学时差异悬殊,中国学前教育本科课程门类更为复杂,课程目标达成情况不如新西兰,新西兰学前教育课程实施经验值得中国学前教育专业课程改革借鉴.     

工业遗产价值向度探析

工业遗产折射着渐趋流变的工业文化,反映出文明嬗变的时代印记。工业发展有赖于科学技术进化,而价值认识促催工业遗产发轫。随着工业信息化和城市现代化快速推进,加之产业布局不断调整规划,原有模式日渐弃置,众多工业遗产面临着存废抉择。保护工业遗产关键在于认定其普遍性的价值表征,无论从人文社会、历史文化研究层面,还是从工艺审美、经济实用抑或教育宣传角度,对人类社会来说,工业遗产本身都蕴孕着重要的价值功能。探析工业遗产价值向度,对于加强工业遗产保护与利用,意义重大而深远。     

Diversity arrays technology (DArT) for studying the genetic polymorphism of flue-cured tobacco (Nicotiana tabacum)

Diversity arrays technology (DArT) is a microarray-based marker system that achieves high throughput by reducing the complexity of the genome. A DArT chip has recently been developed for tobacco. In this study, we genotyped 267 flue-cured cultivars/landraces, including 121 Chinese accessions over five decades from widespread geographic regions in China, 103 from the Americas, and 43 other foreign cultivars, using the newly developed chip. Three hundred and thirty polymorphic DArT makers were selected and used for a phylogenetic analysis, which suggested that the 267 accessions could be classified into two subgroups, which could each be further divided into 2–4 sections. Eight elite cultivars, which account for 83% of the area of Chinese tobacco production, were all found in one subgroup. Two high-quality cultivars, HHDJY and Cuibi1, were grouped together in one section, while six other high-yield cultivars were grouped into another section. The 330 DArT marker clones were sequenced and close to 95% of them are within non-repetitive regions. Finally, the implications of this study for Chinese flue-cured tobacco breeding and production programs were discussed.     

Mining subtopics from text fragments for a web query

Web search queries are often ambiguous or faceted, and the task of identifying the major underlying senses and facets of queries has received much attention in recent years. We refer to this task as query subtopic mining. In this paper, we propose to use surrounding text of query terms in top retrieved documents to mine subtopics and rank them. We first extract text fragments containing query terms from different parts of documents. Then we group similar text fragments into clusters and generate a readable subtopic for each cluster. Based on the cluster and the language model trained from a query log, we calculate three features and combine them into a relevance score for each subtopic. Subtopics are finally ranked by balancing relevance and novelty. Our evaluation experiments with the NTCIR-9 INTENT Chinese Subtopic Mining test collection show that our method significantly outperforms a query log based method proposed by Radlinski et al. (2010) and a search result clustering based method proposed by Zeng et al. (2004) in terms of precision, I-rec, D-nDCG and D#-nDCG, the official evaluation metrics used at the NTCIR-9 INTENT task. Moreover, our generated subtopics are significantly more readable than those generated by the search result clustering method.     

面向云计算的数字图书馆虚拟机系统安全研究

随着云计算技术的不断发展,虚拟机在云数字图书馆中得到了广泛的应用,但也带来了新的安全威胁。文章设计了一种云计算环境下数字图书馆虚拟机安全管理策略,该策略能有效地提高云计算环境下数字图书馆虚拟机系统的整体安全性。     

“数字人文”内涵与古籍数字化的深度开发

"数字人文"是当代信息技术与人文研究融合而形成的一个新兴研究领域,在国内,其理论构建和应用研究都在初步探索阶段。但随着研究的深入,数字人文必将对图书馆工作产生重要的影响。由此,作为数字图书馆建设重要组成部分的古籍数字化工作,应该充分占有数字人文研究成果,从文本挖掘、GIS技术、文本可视化和古籍语料库四个方面进行古籍数字化的深度开发。     

引文网络的主路径特征研究——以富勒烯领域为例

以富勒烯领域引文数据为样本,通过HistCite^TM生成不同规模与格式的引文网络,利用Pajek集成的三种主路径算法分析不同数据格式、不同网络规模的主路径组分与形态差异,运用曲线拟合方法探索主路径规模与主路径长度间的关系。结果表明:三种主路径算法结果没有显著差异,主路径长度与网络规模呈对数关系,主路径在网络规模约为总顶点数40%后趋于稳定。     

我国早期图书馆学家对参考馆员素质的论述及其启示

20世纪20年代到30年代是我国图书馆参考工作的起源时期,针对人才的遴选问题,我国早期图书馆学家提出了很多见解.归纳这一时期洪有丰、刘国钧等学者对参考馆员应该具有的素质的论述,并分六点阐述这些论述对提高当前参考馆员素质的启示.