专利被引频次的时间影响研究     

罗文馨  赵亚娟 《图书情报工作》2019,63(9):47-60

[目的/意义]研究时间因素对专利被引频次的影响,可以减少时间因素对技术评价活动的制约,提高评价的准确性和可信度。[方法/过程]采集1975-2017年的美国专利数据,开展基于固定效应法的专利被引频次的修正研究。将专利按照不同公开年份和不同技术领域分组,选定组内均值和6个TOP分位数为被引频次基准,统计当前时间点的被引频次基准线及基准线的历史时序变化情况。建立神经网络模型,拟合基准线的时序变化规律,并预测未来统计时间点的基准线。[结果/结论]专利公开年份和统计年份的时间差异,使得专利被引频次无法直接进行比较。本文建立了基于不同技术领域、不同公开年份和不同统计年份的专利被引频次基准线,为专利评估提供参考。  相似文献   

体医融合项目的风险治理:一种新的面向与选择——从非典到新型冠状肺炎谈起     

李明  许文鑫 《武汉体育学院学报》2020,54(5):25-30

体医融合和非医疗健康干预可以有效促进疾病管理与健康服务模式的形成,但体医融合项目治理初期仍然受到理念融合、体医融资、部门协同等因素的影响。该文以病毒、人体免疫与体育运动的体医融合关系视角,依据共生理论对体医融合项目的风险治理逻辑进行了阐述。采用文献资料法、数理统计法等对体医融合项目风险治理的相关个案进行了整理,并基于NVIVO11.0质性分析软件对体医融合个案进行识别分析,构建了体医融合项目风险治理的影响因素评价指标体系,包括13个一级指标30个二级指标。最后提出了体医融合项目风险治理的路径选择(1)将体医融合理念提升至构建公共卫生保障体系战略的高度;(2)落地变现体医融合项目购买方案;(3)打造政府精准购买体医融合项目区块链。  相似文献   

Education in Foreign Languages at Vilnius Technical University     

Z. Kamaitis 《European Journal of Engineering Education》1995,20(1):25-26

The paper deals with studies of engineering programmes in foreign languages at Vilnius Technical University (VTU), Lithuania. In order to organize studies in foreign languages, an International Studies Centre was established in 1992. The following aims were pursued: integrating into the systems of university education of European countries and promoting international exchange of students and staff. BSc studies (architecture, civil engineering, mechanical engineering and electronic engineering programmes) are organized in English, French and German. Over 150 undergraduate students from Lithuania and foreign countries are studying at the centre. About 150 students are enrolled for the next academic year.  相似文献   

《诗文轨范》成书年代考辨     

徐文新 《中国典籍与文化》2008,(4):28-30

<四库全书总日>集部诗文评类存目之元代部分有徐骏<诗文轨范>,且称其为元人,徐骏实为明前中期人.<四库存目丛书>所收<诗文轨范>之"文章缘流"多与<文章辨体序说>相近,应是抄取吴讷之说.其中又有部分内容与徐师曾<文体明辨序说>相近,当是<存日丛书>所据北大图书馆藏清初钞本已为后人增改.反之.<文章辨体序说>与<文体明辨序说>钞自<诗文轨范>的可能性较小.  相似文献   

Health resources on the Internet: a basic list     

Judkins DZ 《Medical reference services quarterly》1996,15(4):13-20

With the plethora of health sites on the Internet, it is sometimes hard to know where to start. This is a basic list of health sites that either cover a subject area comprehensively, or are good general sites to lead to more specific information. Most of these sites include both full-text information as well as links to many other sites on the World-Wide Web. Included are medical, nursing, dental, alternative health, consumer health, organization, and government sites.  相似文献   

从网站推广谈图书馆网站的建设     

邹文欣 《图书馆工作与研究》2006,(6):19-21

本文主要从网站推广的角度对图书馆网站建设中网站设计、网站内容、网站技术的相关问题进行探讨。  相似文献   

视频电子文件的归档格式研究     

项文新  张照余 《档案学研究》2006,90(4)

本文从视频电子文件的来源、压缩编码标准、存储形式、传输方式等方面分析了其类型及特点,研究了视频电子文件归档的要求,并从归档要求出发,指出视频电子文件的归档格式不是惟一的,应根据文件保管目的和利用环境的不同区分为脱机保存格式、近在线保存格式和在线保存格式三类,同时给出了各类保存格式的选择建议。  相似文献   

Automated Classification to Improve the Efficiency of Weeding Library Collections     

Kiri L. Wagstaff  Geoffrey Z. Liu 《The Journal of Academic Librarianship》2018,44(2):238-247

Previous studies have shown that weeding a library collection benefits patrons and increases circulation rates. However, the time required to review the collection and make weeding decisions presents a formidable obstacle. This study empirically evaluated methods for automatically classifying weeding candidates. A data set containing 80,346 items from a large-scale weeding project running from 2011 to 2014 at Wesleyan University was used to train six machine learning classifiers to predict a weeding decision of either ‘Keep’ or ‘Weed’ for each candidate. The study found statistically significant agreement (p?=?0.001) between classifier predictions and librarian judgments for all classifier types. The naive Bayes and linear support vector machine classifiers had the highest recall (fraction of items weeded by librarians that were identified by the algorithm), while the k-nearest-neighbor classifier had the highest precision (fraction of recommended candidates that librarians had chosen to weed). The variables found to be most relevant were: librarian and faculty votes for retention, item age, and the presence of copies in other libraries.  相似文献   

Coaches as sport workers: professional agency within the employment context of elite European basketball     

Laura G. Purdy  Geoffery Z. Kohe  Rūtenis Paulauskas 《Sport, Education and Society》2019,24(2):195-207

Increased activity of multiple stakeholders (e.g. agents and owners) have created new challenges for some coaches working in professional sports clubs. The purpose of this project was to draw attention to the normative or accepted practices inherent in sport work, some of the day-to-day realities of some coaches working in this context, and to understand how coaches’ perceptions of other stakeholders come to bear on their individual circumstances, career expectations/objectives and professional agency. Data were generated from semi-structured interviews with seven professional basketball coaches who worked in top-level European clubs. The analysis reveals the coach’s relationships between some owners and agents differed with respect to exercising professional agency, and, coach’s decisions and actions were tied to their professional ideals as well as understandings of what they need to undertake their work effectively and negotiation and/or adjustment strategies. Occasionally coach’s work practices could be viewed as antithetical to employment security, however, the presence of insecurity was at times embraced and used strategically to affect workers’ career decisions. Amid contemporary regional geo-political shifts, this work aids examinations of global sport settings, structures and issues that may contour sporting professionals’ lives.  相似文献   

动物淋巴细胞转化反应稳定性因素的探讨—影响家兔B淋巴细胞转化反应因素的研究     

王文新 《大连大学学报》1991,(3)

本文系统地观察 SPA 含量、小牛血清含量、pH、血量和1640营养液量等因素对淋巴细胞转化反应的影响,为建立常规的测定方法奠定基础。  相似文献