排序方式： 共有28条查询结果，搜索用时 62 毫秒
1.
图书馆精准服务是"互联网+"时代的图书馆发展的必然趋势,要实现"精准"必须关注的基础就是用户。文章在对用户画像理念及国内外研究梳理的基础上,从现有大数据利用状况、主观上精准服务转型的需要和客观上该技术执行可行性三方面分析用户画像技术实现高校图书馆精准服务的可行性。最后在搭建图书馆精准服务架构系统的基础上,提出围绕用户画像实现高校图书馆精准服务的技术过程。 相似文献
2.
A multi-analytical approach for the study of brazilwood and its lake pigments was carried out based on historically accurate reconstructions. Recipes for brazilwood lakes from the fifteenth century technical text Livro de como se fazem as cores and the Winsor & Newton nineteenth century colourman's archive were reproduced and compared. Both primary sources allowed for the successful preparation of brazilwood lake pigments with colours that vary from light pink to dark red. The main steps and ingredients for the manufacture of these pigments were common in both sources, particularly the addition of Al3+ in the form of alum, and calcium carbonate (chalk). Reconstructions revealed that the latter acts as a pH buffer and filler, controlling the pH at which the lake pigment precipitates. The main difference between the two sources is that the nineteenth century recipes give the quantities for all ingredients, the precise temperatures and time, and achieved higher relative pigment yields (75% versus 45%). Full chemical characterisation of the reconstructions provided detailed information on the individual steps in the pigment manufacture and revealed that the presence of calcium sulphate dihydrate (gypsum) in the final pigment was a result of its formation in situ. Infrared, reflectance, and fluorescence spectroscopy proved to be essential and complementary techniques: while infrared was used to characterise additives and binders, reflectance and fluorescence data were fundamental for identifying the chromophore. The pigments and paints produced can now be used as standards for the identification and investigation of brazilwood lake pigments found in artworks. 相似文献
3.
通过邮件精准推送实现学术论文高效传播 总被引：2，自引：2，他引：0
[目的]为科技期刊编辑提供学术论文邮件精准推送的经验,实现论文高效传播,提升科技期刊影响力。[方法]基于Science China-Physics, Mechanics & Astronomy(SCPMA)期刊文章邮件精准推送实践,介绍了邮件精准推送的优势、查找文章相关领域小同行的方法以及充分挖掘有效推送群体的相关经验,并提出一些切实的建议。[结果]具体实例和统计数据表明论文邮件精准推送对SCPMA文章被引频次提升有明显促进作用。[结论]邮件精准推送是高效传播学术论文、提升科技期刊影响力的重要方法,应该成为学术期刊编辑重要的工作内容之一。 相似文献
4.
理想中,准确定位成为遏制高校千校一面,促进高校特色化发展的有效途径。基于学界认同的高校趋同发展的根源在于定位不准,面对高校准确定位应然与实然的巨大差距,通过对准确与模糊两类定位的分析,阐明准确定位是定位理论中的一种聚焦。高校定位系统是准确定位与模糊定位的集合,类型定位准确不等于高校自动走向趋异,合理的定位应是准确或明确,做到可考量与可评价,提出合理定位促进高校发展的建议。 相似文献
5.
针对电力技术期刊关键词选取不当,扰乱网上检索现象进行了分析,找出了产生该现象原因,即用词不准确、错用标志词、乱用缩略语等。结合当前电力技术期刊编辑部环境,提出了避免该现象出现的几种防范措施,以保障电力技术期刊科技论文被数据库正常检索收录。 相似文献
6.
Vanessa Otero Joana V. Pinto Leslie Carlyle Márcia Vilarigues Marine Cotte 《文物保护研究》2017,62(3):123-149
The Winsor & NewtonTM (W&N) nineteenth century archive database includes digitised images of hand-written instructions and workshop notes for the manufacture of their artists’ materials. For the first time, all 183 production records for yellow lead chromate pigments were studied and evaluated. They revealed that W&N produced essentially three pigment types: lemon/pale based on mixed crystals of lead chromate and lead sulphate [Pb(Cr,S)O4]; middle on pure monoclinic lead chromate [PbCrO4]; and deep that contains the latter admixed with basic lead chromate [Pb2CrO5]; accounting for 53, 22, and 21% of the production, respectively. Production records for primrose (4%) were also included since the formulation results in mixed crystals with a high percentage of lead sulphate, which, according to the literature, leaves it more prone to degradation. Each pigment type is characterised by only one or two main synthetic pathways; process variations reveal a systematic and thorough search for a high-quality durable product. A comparison of the chemical composition of pigment reconstructions with early W&N oil paint tubes showed that their records entitled ‘pale’ and ‘lemon’ correlated with the pigment in their tube labelled chrome yellow and, ‘middle’ and ‘deep’ with the label chrome deep. Lemon and middle pigment formulations were made into oil paints to assess their relative photo-stability. The degradation process was followed by colorimetry and was studied by synchrotron radiation-based techniques. Based on the X-ray absorption spectroscopy data, the possibility for creating a stability index for chrome yellows is discussed. 相似文献
7.
邓传萍 《遵义师范学院学报》2006,8(6):1-2
遵义市“四在农家”创建活动是建设社会主义新农村的有益探索,其主要任务和目标与党中央明确的建设社会主义新农村的主要任务和目标一致,“七个一”和“五通三改三建”的具体创建内容是实现建设社会主义新农村的主要任务和目标——生产发展、生活宽裕、乡风文明、村容整洁、管理民主——的有力抓手。 相似文献
8.
黄绍清 《广播电视大学学报》2009,(1):81-85
令人爱不释手的报告文学佳作,无不以“精而短”的特点取胜。从而卓然独立于文学之林。要创作新世纪报告文学的“精短”作品必须注意——剪裁艺术：“沙汰其枝叶”,“约取其本根”;写人技巧：凸现其个性,力求真像活;表述策略：倾注其激情,阐释与想像。 相似文献
9.
Anchored in national longitudinal data analyzed through hierarchical linear and non-linear modeling, this study found that
African-American students have a similar probability of obtaining a BA degree whether they attended a historically Black college
or university (HBCU) or a historically White college or university (HWCU). Among African-Americans, females are more likely
to obtain a baccalaureate degree than males. Especially given that HBCUs are significantly underfunded relative to HWCUs,
the findings of this study lend support to the proposition that HBCUs contribute significantly to higher education in this
country and merit strong support from both the public and private sectors.
This paper was presented at the American Education Research Association Conference in April 2005. 相似文献
10.
文章针对高校图书馆在本科生教学服务中存在的相关问题,提出了本科生教育教学精准服务方案,并且设计与实现了“新型个人图书馆”和“我身边的图书馆”两大子系统,呈现出了多系统对接、多数据融合、资源覆盖类型广等多个创新点,从而实现线上线下混合式文献资源精准化推送服务。该服务的推出能使图书馆在人才培养方面发挥更大的作用。 相似文献