全文获取类型
收费全文 | 37715篇 |
免费 | 1662篇 |
国内免费 | 30篇 |
专业分类
39407篇 |
出版年
2021年 | 389篇 |
2020年 | 533篇 |
2019年 | 644篇 |
2018年 | 903篇 |
2017年 | 896篇 |
2016年 | 940篇 |
2015年 | 614篇 |
2014年 | 749篇 |
2013年 | 3262篇 |
2012年 | 1432篇 |
2011年 | 1431篇 |
2010年 | 898篇 |
2009年 | 848篇 |
2008年 | 1201篇 |
2007年 | 1161篇 |
2006年 | 1038篇 |
2005年 | 865篇 |
2004年 | 821篇 |
2003年 | 754篇 |
2002年 | 754篇 |
2001年 | 1128篇 |
2000年 | 1132篇 |
1999年 | 844篇 |
1998年 | 364篇 |
1997年 | 330篇 |
1995年 | 342篇 |
1992年 | 659篇 |
1991年 | 624篇 |
1990年 | 599篇 |
1989年 | 568篇 |
1988年 | 572篇 |
1987年 | 507篇 |
1986年 | 508篇 |
1985年 | 553篇 |
1984年 | 463篇 |
1983年 | 410篇 |
1982年 | 324篇 |
1979年 | 486篇 |
1978年 | 338篇 |
1976年 | 325篇 |
1975年 | 372篇 |
1974年 | 444篇 |
1973年 | 480篇 |
1972年 | 422篇 |
1971年 | 366篇 |
1970年 | 326篇 |
1969年 | 351篇 |
1968年 | 438篇 |
1967年 | 378篇 |
1966年 | 372篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
This study examines the relationship of life stress, daily hassles, and perceived self-efficacy to adjustment in a community sample of 32 men and 32 women between ages 65 and 75. In a structured interview, negative life change events, daily hassles, self-efficacy, depression, psychosomatic symptoms, and negative well being were assessed. Both negative life events and daily hassles were related to psychological distress and physical symptoms for men, and hassles were associated with psychological distress and physical symptoms for women. An inverse relationship between self-efficacy and maladjustment was also found. Hassles showed the most powerful relationship to distress. 相似文献
22.
How people learn chunks or associations between adjacent items in sequences was modelled. Two previously successful models of how people learn artificial grammars were contrasted: the CCN, a network version of the competitive chunker of Servan‐Schreiber and Anderson [J. Exp. Psychol.: Learn. Mem. Cogn. 16 (1990) 592], which produces local and compositionally‐structured chunk representations acquired incrementally; and the simple recurrent network (SRN) of Elman [Cogn. Sci. 14 (1990) 179], which acquires distributed representations through error correction. The models' susceptibility to two types of interference was determined: prediction conflicts, in which a given letter can predict two other letters that appear next with an unequal frequency; and retroactive interference, in which the prediction made by a letter changes in the second half of training. The predictions of the models were determined by exploring parameter space and seeing howdensely different regions of the space of possible experimental outcomes were populated by model outcomes. For both types of interference, human data fell squarely in regions characteristic of CCN performance but not characteristic of SRN performance. 相似文献
23.
24.
25.
26.
27.
The token economy has been the primary model for the behavioral management of inpatient populations. However, this basically operant approach seldom emphasizes the development of cognitive-coping skills to help patients more effectively manage stressors that result in hospitalization. The Therapeutic Contract Program (TCP) is described as an inpatient-treatment strategy that is designed to help foster such cognitive-coping and self-control skills. While external structure is provided by components of this program, subprograms of the TCP have as their goal the development of internally-attributed coping skills and self-perceptions of competence. This preliminary report describes the structure of the TCP, as well as planned and in-progress measures of program participation and treatment outcome. 相似文献
28.
29.
30.