首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   283篇
  免费   80篇
  国内免费   23篇
耳鼻咽喉   3篇
基础医学   8篇
口腔科学   15篇
临床医学   53篇
内科学   67篇
皮肤病学   7篇
神经病学   22篇
特种医学   2篇
外科学   34篇
综合类   54篇
预防医学   41篇
眼科学   24篇
药学   28篇
  1篇
中国医学   22篇
肿瘤学   5篇
  2024年   9篇
  2023年   41篇
  2022年   65篇
  2021年   41篇
  2020年   39篇
  2019年   19篇
  2018年   14篇
  2017年   16篇
  2016年   22篇
  2015年   17篇
  2014年   12篇
  2013年   17篇
  2012年   17篇
  2011年   22篇
  2010年   9篇
  2009年   7篇
  2008年   5篇
  2007年   3篇
  2006年   1篇
  2005年   2篇
  2004年   2篇
  2003年   2篇
  2002年   1篇
  2000年   1篇
  1997年   1篇
  1995年   1篇
排序方式: 共有386条查询结果,搜索用时 0 毫秒
11.
目的对研究名老中医经验传承的文献进行整理、分析,以推动我国的名老中医经验传承研究工作。方法在中国生物医学文献数据库中,选择“名医经验”和“名老中医”分别为主题词和关键词。采用检索策略:名医经验/全部树/全部副主题词OR缺省[智能]:名医经验OR缺省[智能]:名老中医,检索文献。结果经过去重和人工筛选后,共检索到论文9024篇。结论纵览几十年的文献,名老中医经验传承研究走过了从起步到繁荣,从独立研究到合作研究,从运用传统方法到尝试各种新方法的道路。  相似文献   
12.
[目的]探索中医体质与行为生活方式研究的现状、热点和趋势.[方法]检索中国知网建库至2020年12月收录的中医体质与行为生活方式研究文献,运用CiteSpace软件进行知识图谱可视化分析并开展计量学研究.[结果]共纳入563篇文献.发文量整体呈上升趋势;刊载文献量≥5篇的20本期刊中核心期刊13本,占65.00%;学位...  相似文献   
13.
[目的] 使用文献可视化分析程序CiteSpace对近20年Web of Science数据库中甘草酸的相关文献进行可视化分析,得到显示该领域研究情况的知识图谱。[方法] 以Glycyrrhizic acid、Glycyrrhizin acid、Glycyrrhiza acid、Glycyrrhizinate和Glycyrrhizic为主题分别检索2000—2020年期间Web of Science数据库中甘草酸相关的研究性论文及综述。检索结果去重后以CiteSpace程序分析其关键词共现和聚类、国家、研究领域、发表期刊、共被引用论文等情况,并利用程序将分析结果可视化。[结果] 通过检索获得2 418篇文献,发表文章数量较多的国家是中国(1 057篇),日本(281篇)和韩国(186篇),其中有537篇受到国家自然科学基金资助,占总数的22.21%。共现关键词包括保肝、抗炎、抗氧化应激等研究方向,主要发表在Molecules、Biological Pharmaceutical Bulletin、Journal of Ethnopharmacology等期刊。[结论] CiteSpace的分析结果展现了甘草酸在药理学、化学、食品营养学等领域自21世纪以来的文献发表情况、研究方向、热点关键词等,并将其可视化为知识图谱,精准定位知识前沿,为未来关于甘草酸的研究选题提供一定参考。  相似文献   
14.
Multimodal molecular imaging technologies have been widely used to optimize medical research and clinical practice. Bibliometric analysis was performed to identify global research trends, hot spots, and scientific frontiers of multimodal molecular imaging technology from 2012 to 2021. The articles and reviews related to multimodal molecular imaging were retrieved from the Web of Science Core Collection. A bibliometric study was performed using CiteSpace and VOSviewer. A total of 4169 articles and reviews from 2012 to 2021 were analyzed. An increasing trend in the number of articles on multimodal molecular imaging technology was observed. These publications mainly come from 417 institutions in 92 countries, led by the USA and China. K. Bailey Freund published the most papers amongst the publications, while R.F. Spaide had the most co-citations. A dual map overlay of the literature shows that most publications were specialized in physics/materials/chemistry, and molecular/biology/immunology. Synergistic therapy in cancer, advanced nanotechnology, and multimodal imaging in ophthalmology are new trends and developing areas of interest. A global bibliometric and visualization analysis was used to comprehensively review the published research related to multimodal molecular imaging. This study may help in understanding the dynamic patterns of multimodal molecular imaging technology research and point out the developing areas of this field.  相似文献   
15.
Background:The aim of this study was to analyze published papers on the use of herbal medicine in obesity research over the past 20 years using bibliometric methods and present an overview of global research trends.Methods:English articles on herbal medicine for obesity published from 2001 to 2020 were retrieved from the Web of Science Core Collection database using the search terms “herbal” AND “obesity”. Microsoft Office Excel was used to sort and analyze the statistical data. Bibliographic analysis and data visualization were performed using visualization of similarities viewer based on publication year, country of publication, journal, research area, author, affiliated institution, and keywords.Results:A total of 463 English articles were retrieved, and we observed a trend in which the number of publications on herbal medicine for obesity has gradually increased over the past 20 years. The most productive countries and research organizations in this field were Korea and Kyunghee University, respectively. Many papers have been published in research areas, such as pharmacology pharmacy and integrative complementary medicine, and the journals with the most published articles in this field were Journal of Ethnopharmacology and Evidence-Based Complementary and Alternative Medicine. The main research keywords formed 3 clusters, and keywords with the most occurrences were “obesity,” “adipose-tissue,” and “insulin resistance.”Conclusion:This study presents an overview of the global research trend of herbal medicine for obesity from the bibliographic analysis. An increased understanding of the recently changing research topics provides a new perspective on future research directions. This study may help guide the research in the field of obesity in the future.  相似文献   
16.
Background:The diagnosis and treatment rate of Parkinson disease (PD) with depression has a low diagnostic rate, and there is no consensus on the choice of treatment mode. This study evaluates the global research trends of scientific outputs related to depression in PD from multiple perspectives, using a bibliometric analysis and visualization tool to scientifically analyze the knowledge from the literature.Methods:Literature related to depression in PD published from 2012 to 2021 was included and selected from the Web of Science Core Collection database in October 2021. CiteSpace software was used to visualize and analyze co-occurrence analyses for countries, institutions, authors, and keywords.Results:A total of 4533 articles from the Web of Science database were included. The United States made the largest contribution with the majority of publications (1215; 29.40%). Toronto University was the most productive institution. PD, depression, quality of life, dementia, nonmotor symptom, prevalence, anxiety, Alzheimer disease, symptom, and disorder would be significantly correlated with depression in PD. The current hot spots in this field focus on the following: risk factors for depression in PD, assessment scale of depression in PD, and rehabilitation of depression in PD.Conclusions:This analysis not only reveals the current research trends and hotspots but also provides some instructive suggestions on the development of depression in PD.  相似文献   
17.
Purpose:This study aims to facilitate researchers’ and clinicians’ understanding of research frontiers and trends in nocturia. It explores the scientific research outcomes and key bibliometric indices and plots global research on nocturia.Methods:A bibliometric retrospective study was designed, and an online search was conducted in the Web of Science Core Collection database using the potential search keywords related to nocturia in the title field with some specific filtration. HistCite™ and VOSviewer software for windows were used to analyze the data obtained for authors, journals, countries, institutions, keywords, and visualization mapping.Results:The initial search retrieved 1479 hits. A total of 1445 publications were included in the final analysis. Of these, 43.53% were published as articles. The most studied area in nocturia is urology nephrology. The most productive year was 2019 (n = 121, citations = 335), and the most prolific author, both in terms of publications (n = 97) and citations (1658) was Weiss JP. The most cited journal in nocturia research was the Journal of Urology (n = 293, citations = 3050). The most widely used keyword in nocturia publications was nocturia (n = 1249). Visualization mapping shows that the USA was the most influential and highly cited country in nocturia research.Conclusion:This study showed that there has been an increasing research trend in nocturia over the past few years. The current findings provide important empirical evidence for researchers, clinicians, and physicians to understand research frontiers and trends, achievements, collaborative networks, and hotspot research topics in the research field of nocturia.  相似文献   
18.
Background:Sacubitril/valsartan has been approved for the treatment of heart failure (HF) patients with reduced ejection fraction; since then, it gradually became a new star drug in the therapy of HF. Nevertheless, the effectiveness of sacubitril/valsartan remains under investigation. Thus far, only a few bibliometric studies have systematically analyzed the application of sacubitril/valsartan.Methods:Publications on sacubitril/valsartan were retrieved from the Web of Science Core Collection on April 29, 2021. Data were analyzed using Microsoft Excel 2019 (Redmond, WA), VOS viewer (Redmond, WA), and Cite Space V (Drexel University, Philadelphia, PA).Results:A total of 1309 publications on sacubitril/valsartan published from 1995 to 2021 were retrieved. The number of publications regarding sacubitril/valsartan increased sharply in the last 6 years (2015–2021), and American scholars authored >40% of those publications. Most were published in the European Journal of Heart Failure, the United States was the bellwether with a solid academic reputation in this area. Solomon published the highest number of related articles and was the most frequently cited author. “Heart failure” was the leading research hotspot. The keywords, “inflammation,” “fibrosis,” and “oxidative stress” appeared most recently as research fronts.Conclusions:Research attention should be focused on clinical trial outcomes. Considering its effectiveness in HF, the mechanisms and further applications of sacubitril/valsartan may become research hotspots in the future and should be closely examined.  相似文献   
19.
20.
BackgroundThe use of Multi‐Criteria Decision Analysis (MCDA) in health care has become common. However, the literature lacks systematic review trend analysis on the application of MCDA in health care.AimTo systematically identify applications of MCDA to the areas of health care, and to report on publication trends.MethodsEnglish language studies published from January 1, 1980 until October 1, 2013 were included. Electronic databases searches were supplemented by searching conference proceedings and relevant journals. Studies considered for inclusion were those using MCDA techniques within the areas of health care, and involving the participation of decision makers. A bibliometric analysis was undertaken to present the publication trends.ResultsA total of 66 citations met the inclusion criteria. An increase in publication trend occurred in the years 1990, 1997, 1999, 2005, 2008, and 2012. For the remaining years, the publication trend was either steady or declining. The trend shows that the number of publications reached its highest peak in 2012 (n = 9). Medical Decision Making was the dominant with the highest number published papers (n = 7). The majority of the studies were conducted in the US (n = 29). Medical Decision Making journal published the highest number of articles (n = 7). Analytic Hierarchy Process (n = 33) was the most used MCDA technique. Cancer was the most researched disease topic (n = 12). The most covered area of application was diagnosis and treatment (n = 26).ConclusionThe review shows that MCDA has been applied to a broad range of areas in the health care, with the use of a variety of methodological approaches. Further research is needed to develop practice guidelines for the appropriate application and reporting of MCDA methods.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号