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   203860篇
  免费   8891篇
  国内免费   157篇
  212908篇
  2020年   2841篇
  2019年   3526篇
  2018年   3899篇
  2017年   4321篇
  2016年   4907篇
  2015年   4008篇
  2014年   4892篇
  2013年   23940篇
  2012年   5522篇
  2011年   4936篇
  2010年   4375篇
  2009年   5039篇
  2008年   5049篇
  2007年   4677篇
  2006年   4958篇
  2005年   4827篇
  2004年   4290篇
  2003年   3874篇
  2002年   3728篇
  2001年   4687篇
  2000年   4524篇
  1999年   4075篇
  1998年   2996篇
  1997年   2808篇
  1996年   2733篇
  1995年   2533篇
  1994年   2488篇
  1993年   2446篇
  1992年   3373篇
  1991年   3182篇
  1990年   3038篇
  1989年   2862篇
  1988年   2834篇
  1987年   2804篇
  1986年   2850篇
  1985年   3033篇
  1984年   2971篇
  1983年   2680篇
  1982年   2522篇
  1981年   2497篇
  1980年   2338篇
  1979年   2769篇
  1978年   2460篇
  1977年   2357篇
  1976年   2188篇
  1975年   2474篇
  1974年   2588篇
  1973年   2533篇
  1972年   2113篇
  1968年   1974篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
231.
232.
233.
The purpose of this paper is to study the convergent validity of the four most widely used burnout measures in a sample of Chinese nurses (N= 717). First, Structural Equation Modeling was used to investigate the factor structure of scores produced by the Maslach Burnout Inventory‐General Survey (MBI‐GS), the Burnout Measure (BM), the Shirom‐Melamed Burnout Measure (SMBM), and the Oldenburg Burnout Inventory (OLBI). Next, several competing models were tested to investigate the convergent validity of these four burnout instruments. The final results suggest that burnout is best conceived of as a multidimensional construct consisting of exhaustion and withdrawal, which are two related but conceptually distinct aspects. In addition, positively phrased items should be dropped from burnout measures for they constitute a separate factor that is considered to be an artifact.  相似文献   
234.
235.
Public goods theories highlight an incentive system that rewards ‘free riding’ on the contributions of early contributors toward collective actions. However, because such theories focus on creation of the good, they may underestimate returns that accrue to early contributors subsequent to the good's realization. The concept of formative investment is introduced here to describe the extent to which organizations help to create public goods such as interorganizational linkages like participatory federations. Data from the CEOs of 48 organizations involved in a participatory federation were used to assess how an organization's level of formative investment is related to later patterns of dependency and interaction among federation members. Findings suggest that from a long‐term perspective, and for goods that involve communication and interaction, the incentive structure may not be so favorable for free riders. To the extent that organizations with high formative investment have the capability to envision the future and communicate that vision to potential federation partners, they may be able to both reduce free riding and secure for themselves advantageous positions in the subsequent network of relations.  相似文献   
236.
ABSTRACT

Hegel's Phenomenology of Spirit provides a fascinating picture of individual minds caught up in “recognitive” relations so as to constitute a realm—“spirit”—which, while necessarily embedded in nature, is not reducible to it. In this essay I suggest a contemporary path for developing Hegel's suggestive ideas in a way that broadly conforms to the demands of his own system, such that one moves from logic to a philosophy of mind. Hence I draw on Hegel's “subjective logic”, understood in the light of modern modal logic, in an attempt to model the way minds might be thought as connected by way of shared intentional contents. Here, we should not be surprised at some of the parallels that emerge between the approaches of Hegel and the modal logician Arthur Prior, as Prior had testified to the influence of his teacher, John N. Findlay, who himself had strong Hegelian leanings. In the final section, Robert Stalnaker's version of possible-world semantics is suggested as a framework within which Hegel's recognitive account of the mind might be understood.  相似文献   
237.
238.
239.
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   
240.
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