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   2139篇
  免费   134篇
  国内免费   31篇
  2304篇
  2024年   24篇
  2023年   22篇
  2022年   22篇
  2021年   27篇
  2020年   38篇
  2019年   57篇
  2018年   57篇
  2017年   59篇
  2016年   55篇
  2015年   32篇
  2014年   61篇
  2013年   211篇
  2012年   86篇
  2011年   114篇
  2010年   70篇
  2009年   65篇
  2008年   88篇
  2007年   125篇
  2006年   99篇
  2005年   95篇
  2004年   70篇
  2003年   58篇
  2002年   51篇
  2001年   70篇
  2000年   61篇
  1999年   59篇
  1998年   28篇
  1997年   16篇
  1996年   13篇
  1995年   20篇
  1994年   14篇
  1993年   18篇
  1992年   18篇
  1991年   28篇
  1990年   30篇
  1989年   19篇
  1988年   13篇
  1987年   16篇
  1986年   20篇
  1985年   20篇
  1982年   14篇
  1979年   11篇
  1978年   14篇
  1976年   13篇
  1975年   15篇
  1973年   17篇
  1972年   11篇
  1970年   13篇
  1969年   11篇
  1968年   15篇
排序方式: 共有2304条查询结果,搜索用时 0 毫秒
51.
Huang  Linus Ta-Lun 《Synthese》2021,198(9):8043-8072
Synthese - A fundamental task for any prospective cognitive architecture is information control: routing information to the relevant mechanisms to support a variety of tasks. Jerry Fodor has argued...  相似文献   
52.
Current Psychology - In order to ascertain the onset mechanism of problematic mobile phone use (PMPU), the current study tested the mechanism by which sleep quality is associated with PMPU though...  相似文献   
53.
Applied Research in Quality of Life - Leisure activities provide an opportunity to stimulate an individual’s creative potential, making positive contributions to health and well-being. Using...  相似文献   
54.
The experiments were performed on adult male cats selected initially as good mousekillers. Cats were tested in pairs and each pair was introduced separately to the experimental compartment. The attitude toward the partner before and during the predatory competition test as well as superiority in catching and killing the mice, considered as an index of dominance, were registered. In the course of experiment five types of relations between the predatory dominance and aggressive behavior were observed. The concept of dominance as an outcome of several factors was discussed. It was concluded that predatory dominance is not based exclusively on aggressive mechanisms, as it may be formed and sustained without overt aggression.  相似文献   
55.
Preface     
  相似文献   
56.
This paper reports on the reliability of children's responses on the Child and Adolescent Services Assessment (CASA) — a self-report instrument for use with 8– to 18-year-olds that gathers information about services used to address mental health problems. Findings were based on interviews completed by 77 children at a one week test-retest interval. Results showed that reports of lifetime service use were as reliable as were reports of service use in the preceding three months. Children reported restrictive and intrusive services more reliably than services that were provided in their natural environment. Reliability appeared to be associated more strongly with characteristics of the type of service than with characteristics of the child. Children also could report reliably on some details about their encounters with service providers (e.g., length of stay, number of visits, and onset of service use).  相似文献   
57.
A sequence of analytic sessions of a professional woman in her forties is used to illustrate the moving along process. The material shows a gradual change, where the patient's experience of her sense of agency is altered through a particular kind of interactive sequence. The example is intended to make it clear that the group's view of how change occurs is not strictly or primarily in terms of sudden changes, and that the problem of assessing moments of meeting as well as quantitative and qualitative shifts is one with which the group continues to struggle. © 1998 Michigan Association for Infant Mental Health  相似文献   
58.
Arousal effects on a 1-trial visual recognition paired-comparison task were studied at newborn, 1-month, and 4-month test ages. Infants were tested before and after feeding, with arousal assumed to be lower after feeding. Newborns and 1-month-olds shifted from a familiarity preference before feeding to a novelty preference after feeding. A control group tested only after feeding confirmed that this shift was not due to increased stimulus exposure from the prefeeding test. By 4 months, infants showed novelty preferences independent of feeding. This age by arousal interaction for recognition memory extends previous knowledge by including endogenous arousal with age, stimulus, and length of exposure as contributors to familiarity-novelty preferences. It also extends and provides converging evidence for arousal effects on visual attention in early infancy found previously with preferential looking. A shift from subcortical to cortical dominance is supported.  相似文献   
59.
We explore the role of schools in children's mental health services research. Recent literature has suggested that schools play an important role in delivering services to children and adolescents with emotional and behavioral problems. Research in services research, though, has taken a fairly narrow view of which dimensions of school environments are relevant for inclusion in studies. We suggest that a broader view of school environments is appropriate and potentially beneficial to the field. Using Bronfenbrenner's ecological model as a guide, we conceptualize schools as microsystems. Such an approach suggests that all aspects of school environments (treatment as well as non-treatment) are likely to influence many of the outcomes that children's mental health services research frequently targets (e.g., behavioral problems, problematic peer relationships, academic achievement, school attendance). We review literature from a variety of disciplines to suggest relevant features of schools, with particular attention to the role of peer dynamics within schools. We conclude with implications of this expanded conceptualization of schools for children's mental health services research.  相似文献   
60.
By atomic-scale high-angle annular dark-field scanning transmission electron microscopy, the long-period stacking ordered (LPSO) structures in a near-equilibrium Mg97Zn1Y2 (at.%) alloy have been characterised. In addition to 18R and 14H, new polytypes of LPSO structures are analysed and determined as 60R, 78R, 26H, 96R, 38H, 40H, 108H and 246R. All of these LPSO structures feature AB′C′A building blocks with two Mg layers and three Mg layers sandwiched between them. The Bravais lattices and space groups of new polytypes of LPSO structures were easily determined via the newly introduced method. A structural relationship between the LPSOs is proposed.  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