全文获取类型
收费全文 | 294115篇 |
免费 | 9183篇 |
国内免费 | 536篇 |
专业分类
耳鼻咽喉 | 2440篇 |
儿科学 | 10049篇 |
妇产科学 | 5030篇 |
基础医学 | 32479篇 |
口腔科学 | 3708篇 |
临床医学 | 24175篇 |
内科学 | 56060篇 |
皮肤病学 | 2123篇 |
神经病学 | 27942篇 |
特种医学 | 12535篇 |
外国民族医学 | 1篇 |
外科学 | 45862篇 |
综合类 | 3948篇 |
现状与发展 | 1篇 |
一般理论 | 156篇 |
预防医学 | 28326篇 |
眼科学 | 5991篇 |
药学 | 17937篇 |
1篇 | |
中国医学 | 901篇 |
肿瘤学 | 24169篇 |
出版年
2023年 | 563篇 |
2022年 | 859篇 |
2021年 | 2370篇 |
2020年 | 1416篇 |
2019年 | 2417篇 |
2018年 | 24318篇 |
2017年 | 19102篇 |
2016年 | 21520篇 |
2015年 | 3607篇 |
2014年 | 4684篇 |
2013年 | 6250篇 |
2012年 | 15241篇 |
2011年 | 29606篇 |
2010年 | 23367篇 |
2009年 | 15895篇 |
2008年 | 27065篇 |
2007年 | 29680篇 |
2006年 | 8520篇 |
2005年 | 10179篇 |
2004年 | 10919篇 |
2003年 | 11270篇 |
2002年 | 9200篇 |
2001年 | 1456篇 |
2000年 | 1304篇 |
1999年 | 1384篇 |
1998年 | 1643篇 |
1997年 | 1419篇 |
1996年 | 1036篇 |
1995年 | 1043篇 |
1994年 | 890篇 |
1993年 | 841篇 |
1992年 | 715篇 |
1991年 | 703篇 |
1990年 | 682篇 |
1989年 | 593篇 |
1988年 | 570篇 |
1987年 | 533篇 |
1986年 | 454篇 |
1985年 | 539篇 |
1984年 | 587篇 |
1983年 | 550篇 |
1982年 | 724篇 |
1981年 | 616篇 |
1980年 | 574篇 |
1979年 | 374篇 |
1978年 | 361篇 |
1977年 | 352篇 |
1976年 | 303篇 |
1975年 | 281篇 |
1974年 | 301篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Evelyne Harkemanne Jean‐Louis Dargent Pierre‐Paul Roquet‐Gravy Audrey Bulinckx 《Pediatric dermatology》2019,36(3):365-367
We report a case of benign lymphoplasmacytic plaque (LPP) in a child. These asymptomatic erythematous papulonodular lesions are an emerging clinicopathological entity. Herein, we describe a previously unreported site for LPP lesions, namely, the volar wrist and the distal ipsilateral palm. 相似文献
4.
Breanne E. Kunstler Jill L. Cook Joanne L. Kemp Paul D. O’Halloran Caroline F. Finch 《Journal of Science and Medicine in Sport》2019,22(1):2-10
Objectives
To determine: (i) the behaviour change techniques used by a sample of Australian physiotherapists to promote non-treatment physical activity; and (ii) whether those behaviour change techniques are different to the techniques used to encourage adherence to rehabilitation exercises.Design
Cross-sectional survey.Method
An online self-report survey was advertised to private practice and outpatient physiotherapists treating patients with musculoskeletal conditions. The use of 50 behaviour change techniques were measured using five-point Likert-type scale questions.Results
Four-hundred and eighty-six physiotherapists responded to the survey, with 216 surveys fully completed. Most respondents (85.1%) promoted non-treatment physical activity often or all of the time. Respondents frequently used 29 behaviour change techniques to promote non-treatment physical activity or encourage adherence to rehabilitation exercises. A similar number of behaviour change techniques was frequently used to encourage adherence to rehabilitation exercises (n = 28) and promote non-treatment physical activity (n = 26). Half of the behaviour change techniques included in the survey were frequently used for both promoting non-treatment physical activity and encouraging adherence to rehabilitation exercises (n = 25). Graded tasks was the most, and punishment was the least, frequently reported technique used to promote non-treatment physical activity and encourage adherence to rehabilitation exercises.Conclusions
Respondents reported using similar behaviour change techniques to promote non-treatment physical activity and encourage adherence to rehabilitation exercises. The variability in behaviour change technique use suggests the behaviour the physiotherapist is promoting influences their behaviour change technique choice. Including the frequently-used behaviour change techniques in non-treatment physical activity promotion interventions might improve their efficacy. 相似文献5.
6.
Vasundhara Sridharan Yuichi Shoda Jaimee L. Heffner Jonathan Bricker 《Substance use & misuse》2019,54(7):1086-1095
Background: Lay belief systems about the malleability of human attributes have been shown to impact behavior change in multiple domains. Addiction mindset—i.e., beliefs about the permanence (vs. malleability) of addiction — may affect cigarette smokers’ ability to quit, but this has never been examined. Objectives: The aims of the present research were to develop a measure of addiction mindset (study 1) and examine its associations with various psychological aspects of quitting smoking (study 2). Methods: In Study 1, using factor analysis of current smokers’ and nonsmokers’ (n?=?600) responses to 22 items designed to measure addiction mindset, we developed a reliable six-item Addiction Mindset Scale (AMS). In Study 2, adult smokers (n?=?200) completed the AMS, and measures of a number of psychological processes related to smoking. Results: Higher scores on the AMS, indicative of the belief that addiction is malleable (referred to as a growth mindset), were positively and significantly associated with greater motivation to quit, greater commitment to quitting, greater self-efficacy to abstain, less attribution of failure to lack of ability to change addiction, and fewer self-reported barriers to cessation (all p’s < .05). Conclusions: The results of this study show a relationship between the beliefs about the permanence of addiction and psychological processes relevant to quitting smoking. The findings underscore the potential of future research exploring how addiction mindsets relate to successful smoking cessation as well as other types of addictive behavior and how they can be applied to change people’s behavior. 相似文献
7.
Seyed Mehdi BagheriMofidi Majid Pouladian Seyed Behnamedin Jameie Ali Abbaspour Tehrani-Fard 《Australasian physical & engineering sciences in medicine / supported by the Australasian College of Physical Scientists in Medicine and the Australasian Association of Physical Sciences in Medicine》2016,39(3):717-726
Magnetic field generated by neuronal activity could alter magnetic resonance imaging (MRI) signals but detection of such signal is under debate. Previous researches proposed that magnitude signal change is below current detectable level, but phase signal change (PSC) may be measurable with current MRI systems. Optimal imaging parameters like echo time, voxel size and external field direction, could increase the probability of detection of this small signal change. We simulate a voxel of cortical column to determine effect of such parameters on PSC signal. We extended a laminar network model for somatosensory cortex to find neuronal current in each segment of pyramidal neurons (PN). 60,000 PNs of simulated network were positioned randomly in a voxel. Biot–savart law applied to calculate neuronal magnetic field and additional phase. The procedure repeated for eleven neuronal arrangements in the voxel. PSC signal variation with the echo time and voxel size was assessed. The simulated results show that PSC signal increases with echo time, especially 100/80 ms after stimulus for gradient echo/spin echo sequence. It can be up to 0.1 mrad for echo time = 175 ms and voxel size = 1.48 × 1.48 × 2.18 mm3. With echo time less than 25 ms after stimulus, it was just acquired effects of physiological noise on PSC signal. The absolute value of the signal increased with decrease of voxel size, but its components had complex variation. External field orthogonal to local surface of cortex maximizes the signal. Expected PSC signal for tactile detection in the somatosensory cortex increase with echo time and have no oscillation. 相似文献
8.
9.
10.