全文获取类型
收费全文 | 5278篇 |
免费 | 827篇 |
国内免费 | 67篇 |
专业分类
耳鼻咽喉 | 51篇 |
儿科学 | 47篇 |
妇产科学 | 33篇 |
基础医学 | 302篇 |
口腔科学 | 241篇 |
临床医学 | 650篇 |
内科学 | 382篇 |
皮肤病学 | 19篇 |
神经病学 | 188篇 |
特种医学 | 356篇 |
外科学 | 990篇 |
综合类 | 869篇 |
一般理论 | 8篇 |
预防医学 | 1104篇 |
眼科学 | 22篇 |
药学 | 480篇 |
7篇 | |
中国医学 | 346篇 |
肿瘤学 | 77篇 |
出版年
2024年 | 5篇 |
2023年 | 171篇 |
2022年 | 200篇 |
2021年 | 453篇 |
2020年 | 361篇 |
2019年 | 403篇 |
2018年 | 279篇 |
2017年 | 343篇 |
2016年 | 316篇 |
2015年 | 307篇 |
2014年 | 339篇 |
2013年 | 403篇 |
2012年 | 295篇 |
2011年 | 326篇 |
2010年 | 250篇 |
2009年 | 215篇 |
2008年 | 257篇 |
2007年 | 206篇 |
2006年 | 185篇 |
2005年 | 138篇 |
2004年 | 139篇 |
2003年 | 123篇 |
2002年 | 77篇 |
2001年 | 50篇 |
2000年 | 57篇 |
1999年 | 35篇 |
1998年 | 39篇 |
1997年 | 25篇 |
1996年 | 19篇 |
1995年 | 15篇 |
1994年 | 10篇 |
1993年 | 11篇 |
1992年 | 9篇 |
1991年 | 9篇 |
1990年 | 6篇 |
1989年 | 9篇 |
1988年 | 16篇 |
1987年 | 14篇 |
1986年 | 5篇 |
1985年 | 14篇 |
1984年 | 9篇 |
1983年 | 4篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 6篇 |
1979年 | 5篇 |
1978年 | 2篇 |
1977年 | 2篇 |
排序方式: 共有6172条查询结果,搜索用时 15 毫秒
1.
2.
《Journal of pharmaceutical sciences》2019,108(11):3515-3520
Particle size analysis in the pharmaceutical industry has long been a source of debate regarding how best to define measurement accuracy; the degree to which the result of a measurement or calculation conforms to the true value. Defining a “true” value for the size of a particle can be challenging as the output of its measurement will differ because of variations in measurement approaches, instrumental differences and calculation methods. Consequently, for “real” particles, a universal “true” value does not exist and accuracy is therefore not a definable characteristic. Accordingly, precision is then a measure of the ability to reproducibly achieve a measurement of unknown relevance.This article proposes, in place of accuracy, a means to define the “appropriateness” of a measurement in line with the critical quality attributes (CQA) of the material being characterized. The decision as to whether the measurement is correct should involve a link to the CQA; that is, correlation should be demonstrated, without which the measured particle size cannot be defined as a critical material attribute.Correspondingly, methods should also be able to provide sufficient precision to demonstrate discrimination relating to variation in the CQA. The benefits and challenges of this approach are discussed. 相似文献
3.
4.
The midwifery art has emphasised the uniqueness of human beings throughout its Nordic history. The educated Nordic midwife has in the last decade celebrated several hundred years of memories. This article studies how the key ideas of the midwifery art and patterns of ideas become evident in the zeitgeist from the beginning of the 19th century to the millennium in the Nordic countries. The legacy and pattern of ideas of the art of midwifery are interpreted in relation to the texts of the selected historical sources and based on Ricoeur's phenomenological-hermeneutic approach to the text and further to the dedication of understanding and interpretation. The historical sources refer to unprinted primary sources from historical archives and printed secondary and tertiary sources. The patterns of ideas include a tripartite whole: the true cultivation of the head, the philosophy and aesthetics of the hand, the strength of the heart and the drive of calling. These ideas open for unique visions and attest to the evident in modern midwives. Today's midwives have academic training with examinations, and the education is based on scientific evidence. The midwife profession is authorised by the state and supervised by the authorities. 相似文献
5.
6.
7.
8.
9.
Salaam Semaan 《Emerging infectious diseases》2016,22(10):1863-1864
10.
《Enfermería clínica》2020,30(3):136-144
The implementation of Best practice guidelines is effective in improving clinical practice and reducing clinical variability. The Best Practice Guidelines of the Ontario Nurses Association have been implemented in Spain since 2012 following the principles of the Canadian programme of the Best Practice Spotlight Organisations® (BPSO®). The Nursing and Healthcare Research Unit (Investén-isciii) coordinates this programme in Spain, having been nominated BPSO Host by the Ontario Nurses Association.Four strategies were followed: translation of the Best Practice Guidelines, dissemination of same and of the programme, implementation of the Best Practice Guidelines and assessment of the results in competitively selected centres, and, finally, the development of sustainability mechanisms.Implementation is based on the theoretical Knowledge to Action model, which establishes a cycle of 6 phases: identification of the problem and training of selected BPSO®; adaptation to the local context; assessment of facilitators and barriers; adaptation and implementation of interventions; monitoring and evaluation of results, and sustainability. Each of these phases incorporate evidence-based elements that promote the effectiveness of implementation, such as the competitive selection of candidates to participate in the programme, selection by the institution of the guidelines to be implemented, leadership by nurses with a multi-professional approach, planning of the process from work structures that are non-vertical but with the support of the institution, the simultaneous use of multiple strategies, ongoing assessment and feedback of results. All of which is mentored and supported by the BPSO Host.There are currently 27 institutions in Spain of different characteristics that implement a total of 20 clinical guidelines. The scope and structure of the programme has recently been extended with regional BPSO Host coordinating centres, which has brought the number of institutions to 36 and the number of implemented clinical guidelines to 22.The programme has had a positive impact on organisations and the system, on care processes and on patient health. This is evidenced by enriched evidence-based professional practice, the promotion of collaborative networking and by improved patient health outcomes and the quality of care provided. 相似文献