CALIS分布式联合虚拟参考咨询系统的开发

介绍了CALIS分布式联合虚拟参考咨询系统(DCVRS)的开发,包括系统的架构、组成、功能以及相关标准等。DCVRS项目的目的是为CALIS成员馆提供一个联合虚拟参考咨询服务平台,沟通咨询馆员与读者,真正实时地解答读者在使用数字图书馆中第一时间所发生的问题;同时也有助于推动与国内外虚拟参考咨询的合作以及相关标准技术的发展。     

一种基于相似度和信任度融合的微博内容推荐方法

[目的/意义]微博对用户获取信息和建立社交网络具有重要作用。提出一种基于相似度和信任度融合的微博内容推荐方法,能够从用户需求出发进行个性化微博内容推荐,对提高微博服务质量、改善信息过载问题具有意义。[方法/过程]基于相似度和信任度融合算法,构建微博内容推荐模型,以新浪微博为研究对象,采用编程方式获取汽车、体育、运动健身、互联网和财经5个领域的数据,展开用户相似度与信任度计算的实验分析和比较。[结果/结论]分析结果显示该方法可以有效表示和挖掘微博内容,改善微博推荐的准确性和用户满意度。     

美国科技博物馆展览开发中公众参与的研究及启示

展览开发是博物馆展览的基础问题,随着公众参与逐渐被提上研究议程,也促使我们去思考展览开发过程中如何引入公众参与。美国的科技博物馆展览开发已经建立了较为完善的公众参与体系:明确的参与者角色、系统的参与理念和阶段式的参与行为,已经获得了普遍的应用。借鉴美国博物馆的经验,我国博物馆展览的开发,应在构建展览评估体系的基础上,进一步了解和认识公众,拓展公众参与的方式,并不断寻求公众的声音。     

Rollback,scissor-like closure of the Mongol-Okhotsk Ocean and formation of an orocline:magmatic migration based on a large archive of age dataOA

Tracing the closure of oceans with irregular margins and the formation of an orocline are crucial for understanding plate reconstruction and continental assembly.The eastern Central Asian Orogenic Belt,where the Mongol-Okhotsk orocline is situated,is one of the world’s largest magmatic provinces.Using a large data set of U-Pb zircon ages,we updated the timing of many published igneous rocks,which allowed us to recognize tightly ’folded’ linear Carboniferous-Jurassic magmatic belts that wrap arou...     

Identification of twist-angle-dependent excitons in WS2/WSe2 heterobilayersOA

Stacking atomically thin films enables artificial construction of van der Waals heterostructures with exotic functionalities such as superconductivity, the quantum Hall effect, and engineered light-matter interactions.In particular, heterobilayers composed of monolayer transition metal dichalcogenides have attracted significant interest due to their controllable interlayer coupling and trapped valley excitons in moiré superlattices. However, the identification of twist-angle-modulated optical tr...     

科技期刊保密工作中存在的问题及其对策

针对科技期刊泄密事件有发生的现状，提出了加强保密工作的建议和措施。     

我国公益类科研机构体制改革的模式探讨

七年多来,公益类科研机构的改革已经取得了重要的进展和成效。在对我国公益类科研机构的现状深入了解的基础上,本文分析了改革过程中所面临的主要问题;然后重点探讨公益类科研机构体制改革的两种主要模式:企业化转制和向非营利科研机构转制。     

基于弱共现和突发监测的情报学学科研究主题及交叉性分析

[目的/意义]运用弱共现和突发监测两种研究方法,在微观层面对情报学学科的研究主题及其交叉性进行分析,以期揭示与科交叉规律,促进学科交叉研究。[方法/过程]获取情报学学科科研论文的高频主题词,在此基础上生成高频词共现矩阵,并进一步生成弱共现网络,对弱共现网络呈现出的主题及交叉性进行分析。同时,对高频主题词进行突发监测。[结果/结论]研究结果显示,在高频词强共现网络中不突出的研究主题会在高频词弱共现网络凸显出来,这些研究主题可能是当期的研究重点,也可能是将来的研究重点和热点;主题之间弱关系被定义为4类,体现了情报学学科微观层面的交叉性;突发探测结果在研究时间段内显示的研究热点趋势和强共现网络的聚类结果具有一致性,在揭示具有学科交叉性的新研究主题时体现出敏感性、突出性和动态性优势。     

关于高校图书馆申请硕士学位点的思考

高校图书馆申请硕士学位点,是适应图书馆学科理论研究现状与当前图书馆学研究生教育以及图书馆高层次人才匮乏状况而开拓的多元化培养人才途径,是高校培养图书馆人才的一个重要举措,其生源与人才市场看好,并将在图书馆界产生良性综合效应。     

The effects of atmospheric moisture on the mural paintings of the Mogao Grottoes

The aim of this paper is to study the influence of atmospheric humidity and temperature on the mural paintings in the Mogao Grottoes of Dunhuang by measuring the weight of a simulated mural block. Under open conditions, the daily changes in the atmospheric humidity and temperature have an apparent effect on the water content of these murals. There exists an obvious water exchange between atmosphere and mural, that is, there is a ±43?g?m^?2 moisture absorption–desorption ‘breathing’ process between the two. Evapotranspiration from the tree-belt, precipitation, and extremely dry weather also have an effect on the moisture associated with a mural painting. If the cave is closed, a comparable study finds that closure can make the effects of temperature and humidity changes disappear. The mural water content in this case remains stable and the harm due to water-salt deterioration is greatly reduced. Under closed conditions, artificial condensation dehumidification and control of the cave's temperature and humidity stabilizes water activity in the mural paintings very effectively. This is a clear indication of the future steps required to protect the cave's cultural relics.