全文获取类型
收费全文 | 3053篇 |
免费 | 356篇 |
国内免费 | 404篇 |
出版年
2024年 | 7篇 |
2023年 | 57篇 |
2022年 | 69篇 |
2021年 | 114篇 |
2020年 | 185篇 |
2019年 | 184篇 |
2018年 | 198篇 |
2017年 | 194篇 |
2016年 | 189篇 |
2015年 | 131篇 |
2014年 | 155篇 |
2013年 | 460篇 |
2012年 | 107篇 |
2011年 | 130篇 |
2010年 | 89篇 |
2009年 | 130篇 |
2008年 | 103篇 |
2007年 | 123篇 |
2006年 | 118篇 |
2005年 | 130篇 |
2004年 | 132篇 |
2003年 | 111篇 |
2002年 | 82篇 |
2001年 | 81篇 |
2000年 | 67篇 |
1999年 | 42篇 |
1998年 | 40篇 |
1997年 | 42篇 |
1996年 | 31篇 |
1995年 | 48篇 |
1994年 | 28篇 |
1993年 | 13篇 |
1992年 | 19篇 |
1991年 | 14篇 |
1990年 | 11篇 |
1989年 | 12篇 |
1988年 | 10篇 |
1987年 | 18篇 |
1986年 | 9篇 |
1985年 | 12篇 |
1984年 | 17篇 |
1983年 | 13篇 |
1982年 | 16篇 |
1981年 | 8篇 |
1980年 | 12篇 |
1979年 | 14篇 |
1978年 | 11篇 |
1977年 | 7篇 |
1976年 | 7篇 |
1975年 | 8篇 |
排序方式: 共有3813条查询结果,搜索用时 15 毫秒
121.
《Médecine & Droit》2020,2020(165):135-140
If the criminal liability remains personal, recent case law has tended to broaden the hypotheses for the doctor's criminal liability in the case of unintentional offenses. The question particularly concerns the psychiatrist, because of acts committed by his patient, on the basis of articles 221-6 or 222-19 of the French penal code. However, judicial assessment of the fault and its causal link with the damage does not impose on the psychiatrist an obligation of result, insofar as only serious professional misconduct, manifestly not in accordance with the rules of medical art, are sanctioned. 相似文献
122.
《Médecine & Droit》2020,2020(160):1-5
While the Conseil d’État once again confirmed the legality of the medical decision to stop treatment of Vincent Lambert, the Cour de Cassation held that the French State is not required to suspend the execution of the said decision pending the opinion of the Committee on the Rights of Persons with Disabilities, a United Nations’ body. Nevertheless, the High jurisdiction does not directly pronounce itself on the question of the binding force of the provisions of the Convention on the Rights of Persons with Disabilities and its additional protocol, nor on the scope of these texts. 相似文献
123.
This research study focused on the evaluation of an emulated in-vehicle Active Traffic and Demand Management (ATDM) system on Interstate 66 in Northern Virginia. Traditional ATDM systems rely on infrastructure-mounted variable message signs (VMS) to provide information (speed limits, lane availability, etc.) to the traveling public. By providing information about dynamic roadway conditions on an in-vehicle device, the ATDM may improve driving safety and performance by allowing drivers to remain consistently aware of forthcoming traffic conditions and roadway requirements; even when external signage is inaccessible. This study represents an initial investigation of an emulated in-vehicle ATDM to provide developers with design guidance and ensure that unintended consequences, such as distraction, do not undermine the potential benefits.Twenty younger and 20 older participants, accompanied by a member of the research team, experienced the following ATDM features on an in-vehicle device (IVD) mounted to the dashboard: (1) dynamic speed limits, (2) dynamic lane use/shoulder control, (3) High Occupancy Vehicle (HOV) restrictions, and (4) roadway information from variable message signs. The IVD was equipped with auditory and visual alerts notifying the driver when relevant visual information was updated. Research questions addressed distraction and driver behavior associated with use of the system. Qualitative and quantitative participant data was acquired from the instrumented vehicle, various questionnaires, and researcher observation.Several key findings were uncovered: (1) The IVD, as tested, did not warrant classification as a source of distraction according to the NHTSA guidelines; v2) There was a significant difference in eye-glance durations to the IVD when comparing the VMS alerts to both the speed limit and lane management alerts; and (3) The speed limit alert motivated participants to alter their speed (per survey results and participant speed data). 相似文献
124.
Motor vehicle collisions involving older drivers have increased and become an important social issue. It is known that the decline of cognitive function, including dementia, affects driving performance. A series of studies using the Mini-Mental State Examination (MMSE) and other tests of dementia have attempted to prevent motor vehicle collisions by identifying as early as possible older drivers who may be unable to maintain their driving performance. Further, the performance of older drivers may deteriorate even if they do not have a diagnosis of dementia. Therefore we focused on the relationship between cognitive functioning assessed by the MMSE and diagnosis of leukoaraiosis (LA), or changes in the cerebral white matter, with different aspects of driving behavior resulting from aging. Qualified driving instructors evaluated participants’ driving behaviors on an outdoor driving course at a driving school. Visual search duration and angle at intersections were obtained by wearable wireless sensors. Vehicle speed and minimum vehicle speed were recorded from vehicle speed pulse signals. Duration of signaling and visual searches at unsignalized intersections were recorded using an in-vehicle camera. We assessed instructors’ evaluations and the scores on two instruments to evaluate the effects of MMSE scores and the grade of LA on driving performance were verified. The results suggest that lower MMSE scores and higher LA grade can predict some aspects of poor driving performance in older drivers before they experience dementia or an evident decline in cognitive functioning. Based on these results, we discuss countermeasures that may prevent motor vehicle collisions involving older drivers. 相似文献
125.
Mi Kyoung Lee Eunjoo Kim In Shil Paik Jihyun Chung Sang Min Lee 《Counselling and Psychotherapy Research》2020,20(1):164-172
The present study aims to extend the scope of understanding on the relationships between environmental factors and burnout symptoms by targeting and including more extensive occupational demanding variables related to therapist burnout. The present study includes not only common occupational stressors (e.g., working hours, role overload and role conflict) but also variables reflecting the quality of relationship with clients (e.g., case load and negative clientele) that have not been dealt with before in meta‐analytic studies. A meta‐analysis was conducted on 27 original studies published from the year 2006 to 2018. The findings showed that, among environmental factors, role overload had the most significant positive correlations with exhaustion. In addition, negative clientele had the most significant positive correlations with depersonalisation and reduced accomplishment. Furthermore, caseload and low income had relatively weak relations with therapist burnout. Based on these results, implications and limitations of the study are discussed. 相似文献
126.
消极身体意象是青少年健康成长所面临的重要问题之一。了解消极身体意象对青少年的危害以及其形成的影响因素, 对于青少年群体身心健康发展具有重要意义。消极身体意象对青少年的负面影响主要包括自我概念、情绪体验、体重控制策略、饮食失调和社会生活五个方面; 并且青少年消极身体意象形成的影响因素主要有生物因素(BMI)、社会文化因素(父母、同伴和大众媒体)和心理因素(人格因素、认知方式)。未来可从以下几个方面进一步深入研究:(1) 基于生物-心理-社会模型的视角完善青少年身体意象发展的理论模型; (2) 考察社交媒体等新兴因素的作用; (3) 阐明青少年在加工身体相关信息时的认知特点; (4) 推进中国青少年消极身体意象本土化研究。 相似文献
127.
128.
中国性少数群体普遍存在严重的心理健康问题,家庭是其最大的压力来源。在性少数压力模型的背景下,本研究基于Bifactor模型探究父母消极教养方式对中国性少数(LGB)心理健康的特殊影响。采用父母教养方式问卷、抑郁-焦虑-压力量表和金赛量表对649名LGB进行网络问卷调查,结果发现:(1)父母消极教养方式的Bifactor模型存在部分差异;(2)对于LGB心理健康,父母消极教养方式的一般因子和拒绝特殊因子具有损害作用,过度保护特殊因子具有保护作用。 相似文献
129.
为考察视觉空间工作记忆(working memory, WM)维持和操作的组间差异及其神经机制,本研究记录了高、低WM组完成延迟再认(维持)任务和心理旋转(操作)任务时的行为和事件相关电位数据。结果发现,在操作任务中,高WM组比低WM组的反应时显著更短;高WM组的中前额叶慢波显著更正、双侧后顶区慢波显著更负,并且两者的波幅显著负相关。在维持任务中,两组被试的反应时无显著差异;高WM组的中前额叶慢波显著更正。结果表明,高WM组的执行注意能力可能更强,能通过有效调节和分配加工资源来表征视觉信息。 相似文献
130.
Saul Rosenzweig 《Aggressive behavior》1977,3(4):379-383
Aggression is defined as generic assertiveness which includes both constructive and destructive behaviors. An attempt is then made to classify the distinctive operational settings (phenotypic situations) which trigger aggression. The classes of such settings are: 1) privation - the frustration of vital needs and the frustration due to inner conflict of needs; 2) conflict (social) - situation-specific competition and intragroup rivalry for dominance; and 3) victimization — predator-prey relations and vandalism per se. Critical questions which emerge from the definition and classification are posed. 相似文献