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   27952篇
  免费   537篇
  国内免费   3篇
  28492篇
  2019年   330篇
  2018年   461篇
  2017年   479篇
  2016年   513篇
  2015年   395篇
  2014年   465篇
  2013年   2304篇
  2012年   774篇
  2011年   834篇
  2010年   510篇
  2009年   502篇
  2008年   645篇
  2007年   720篇
  2006年   606篇
  2005年   587篇
  2004年   568篇
  2003年   551篇
  2002年   598篇
  2001年   825篇
  2000年   779篇
  1999年   611篇
  1998年   309篇
  1997年   301篇
  1996年   299篇
  1993年   286篇
  1992年   535篇
  1991年   512篇
  1990年   490篇
  1989年   467篇
  1988年   482篇
  1987年   454篇
  1986年   448篇
  1985年   448篇
  1984年   388篇
  1983年   355篇
  1982年   298篇
  1981年   284篇
  1979年   427篇
  1978年   355篇
  1977年   307篇
  1975年   383篇
  1974年   435篇
  1973年   427篇
  1972年   340篇
  1971年   340篇
  1970年   330篇
  1969年   282篇
  1968年   382篇
  1967年   339篇
  1966年   315篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
871.
Behavioral researchers have employed hypermedia-based software applications in their experiments for some time. More recently, interest in the World-Wide Web has developed among researchers in the social sciences, and popular use of this new medium continues to grow at an incredible rate. This paper describes Listener, a tool developed to log users’ hypermedia and World-Wide Web navigation behavior using Apple Macintosh computers in a laboratory setting. Listener is able to capture navigation actions through cached documents, overcoming some of the problems associated with analyzing standard web server logs.  相似文献   
872.
In one computational model of hippocampal function, the entorhinal cortical input to CA1 is hypothesized to play a key role in the ability of CA1 to decode CA3 recodings. Here, we develop a modification of this CA1 decoder hypothesis that is applicable to several computational theories of hippocampal function, and then we electrophysiologically investigate one assumption of this new hypothesis. First, using biologically realistic estimates, we calculate that CA3-induced CA1 excitation is too high and that inhibition plausibly plays a role in this CA1 decoder model. Thus motivated, we turn to a physiological demonstration to substantiate the plausibility of the proposed mechanism. Using the rat hippocampal slice, we examine an interlaminar interaction between the distal perforant path input to hippocampal CA1 stratum moleculare and the more proximal Schaffer collateral input to stratum radiatum. Perforant path activation provides sufficient inhibition to block homosynaptic long-term potentiation elicited by a suitably strong stratum radiatum input. For this interlaminar interaction to be most effective, perforant path activation must both precede and follow Schaffer collateral activation. Perforant path-evoked inhibition in CA1 can thus serve as a viable mechanism in the learned decoder theory of hippocampal CA1.  相似文献   
873.
Religion and spirituality (R/S) can be powerful supports and provide important coping resources for individuals in recovery. Faith communities seem to offer many advantages for recovery-oriented support, but have rarely been the setting for empirically examined psychosocial rehabilitation efforts. This study describes the outcomes for individuals in Living Grace Groups (LGGs), a peer-led group intervention for mental illness that is based in churches and integrates R/S. Persons at all active LGGs were surveyed before and after participation using well-validated scales for recovery, psychiatric symptoms, and spirituality. LGGs attracted individuals with a broad range of persistent psychiatric difficulties, who described religion as important to them and rated the groups as very helpful. Participants reported improvements in recovery and spirituality as well as reductions in psychiatric symptoms. R/S-integrated support groups may improve care by increasing cultural match, as well as providing more access to recovery-oriented care by tapping the resources of faith communities.  相似文献   
874.
875.
876.
877.
878.
879.
880.
Background: Previous studies have reported that children score better in language tasks using sung rather than spoken stimuli. We examined word detection ease in sung and spoken sentences that were equated for phoneme duration and pitch variations in children aged 7 to 12 years with typical language development (TLD) as well as in children with specific language impairment (SLI ), and hypothesized that the facilitation effect would vary with language abilities. Method: In Experiment 1, 69 children with TLD (7–10 years old) detected words in sentences that were spoken, sung on pitches extracted from speech, and sung on original scores. In Experiment 2, we added a natural speech rate condition and tested 68 children with TLD (7–12 years old). In Experiment 3, 16 children with SLI and 16 age-matched children with TLD were tested in all four conditions. Results: In both TLD groups, older children scored better than the younger ones. The matched TLD group scored higher than the SLI group who scored at the level of the younger children with TLD . None of the experiments showed a facilitation effect of sung over spoken stimuli. Conclusions: Word detection abilities improved with age in both TLD and SLI groups. Our findings are compatible with the hypothesis of delayed language abilities in children with SLI , and are discussed in light of the role of durational prosodic cues in words detection.  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