系统地论述了医学期刊所具有的社会功能、经济功能和文化教育功能及我国医学期刊的结构,包括类别结构、出版频率结构、学科结构、语种结构、内容结构、载体结构、时间分布结构和管理结构等八个方面;指出我国医学期刊是一个宠大的期刊体系,只有把医学期刊作为一个开放的整体,对其功能和结构进行研究,对现有的医学期刊进行合理的调整,建立新的、科学的医学期刊布局,才能使资源得到最大限度的挖掘与利用。
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从元数据的概念入手,介绍了DC元数据的产生和发展,体系结构及其在电子资
源描述中的优势等,并从五个方面介绍了DC元数据在数字图书馆中的应用,包括信息资源的
组织,解决系统互操作问题,为用户实现知识导航,用户管理,数据库的设计与维护。
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结合大连医科大学图书馆的生物医学开放存取(Open Access,OA)全文期刊资源导航库建设实践,侧重OA全文期刊资源整合,论述了应用TRS系统建立数据库的具体步骤,包括网上生物医学OA全文期刊资源的获取、建立TRS数据库、数据库在因特网的发布、数据库的维护更新等几个方面,最后提出OA全文期刊资源数据库发展前景。
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利用美国科学情报研究所(ISI)的《科学引文索引》数据库(SCI),对军事医学科学院2001-2004年间在SCI收录期刊上发表论文情况进行了统计,并计量统计分析了各所发文数量、参考文献、载文期刊、发文作者、被引频次和影响因子等指标,旨在揭示该院在SCI收录期刊上发表论文的现状、科研能力、科技产出力和学术交流能力。
相似文献通过《中文核心期刊要目总览》(2004年版)收录军队医药卫生类期刊的统计分析,提示军队医药卫生类期刊和核心期刊在全国医药卫生界都具有重要的地位和作用;军队医药卫生类期刊和核心期刊的主办单位多集中在知识密集程度高的科研院所、军医大学、总医院,基础医学和综合学科方面的期刊被选入核心期刊最多。
相似文献The risk of developing breast cancer increases with age, though a peak may be reached at 75 years. The risk of developing a tumour of advanced clinical stage at presentation apparently increases with age. Local recurrence rates and mortality rates are similar at all ages. It is concluded that the therapy required is similar in all age groups.
The increased risk of developing breast cancer in “never married” women is in the postmenopausal period. Survival rates and the distribution of the various presenting clinical stages are similar in both single and married patients.
Though ageing and marital status have an initiating effect on breast cancer, they do not have a continuing effect on the established disease.
相似文献Two hundred and ninety-three operations were performed for the repair of simple femoral hernia; 91 were performed for the repair of femoral hernia which had developed following an initial ipsilateral inguinal or femoral repair performed previously, either in this hospital or elsewhere.
The basic repair was subinguinal. Four modifications are described, one entirely subinguinal and three combined with exploration of the inguinal canal.
The recurrence rate for simple femoral hernia in the female was 1.3% and for “recurrent” femoral hernia in the female, 5.5%.
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介绍了一项用以检查一体化医学语言系统在概念整合过程中发生的语义类型错误的审核技术。该技术通过对语义网络进行数据图表——数据-语义类型——单一交集的逐层划分,控制了需要检查的概念总数,达到事半功倍的效果。
相似文献Congenital defects in the biliary system are rare and, in a review of the literature, only two cases were found similar to this one. It is generally accepted that these lesions are congenital, but the exact pathogenesis is unknown.
Alonso-Lej, Rever and Pessagno2 reviewed the literature in 1959 and found 403 authentic congenital cysts of the hepatic ducts. The most common congenital defect is a single choledochal cyst of the lower end of the common bile duct. Pain, jaundice and tumour are the main symptoms.
Until the advent of intravenous cholangiography, these lesions were seldom recognized preoperatively. Means of operative repair as well as complications and prognosis are reviewed.
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