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   5008篇
  免费   329篇
  国内免费   2篇
  5339篇
  2023年   48篇
  2022年   35篇
  2021年   62篇
  2020年   115篇
  2019年   149篇
  2018年   172篇
  2017年   214篇
  2016年   199篇
  2015年   135篇
  2014年   186篇
  2013年   628篇
  2012年   245篇
  2011年   283篇
  2010年   147篇
  2009年   164篇
  2008年   244篇
  2007年   178篇
  2006年   178篇
  2005年   174篇
  2004年   183篇
  2003年   145篇
  2002年   160篇
  2001年   68篇
  2000年   77篇
  1999年   47篇
  1998年   54篇
  1997年   53篇
  1996年   46篇
  1995年   36篇
  1994年   33篇
  1993年   27篇
  1992年   47篇
  1991年   32篇
  1990年   31篇
  1989年   36篇
  1988年   34篇
  1987年   39篇
  1986年   31篇
  1985年   45篇
  1984年   54篇
  1983年   45篇
  1982年   32篇
  1981年   29篇
  1980年   43篇
  1979年   34篇
  1978年   32篇
  1977年   39篇
  1976年   32篇
  1975年   26篇
  1968年   24篇
排序方式: 共有5339条查询结果,搜索用时 0 毫秒
71.
There is a growing awareness of how stress adversely affects organizational efficiency. The implementation of stress management programs to counteract this problem has been slow. This study examined such programs in companies who claimed that they were active and successful in stress management for their employees. The successful features of these organizational stress management programs are identified, discussed, and a model for organizations is presented.  相似文献   
72.
A running-wheel-movement-detection system is described for use with an IBM-compatible system and a serial mouse. It is an adaptation of a system developed for use on a Commodore 64. The IBM-compatible system provides obvious advantages in speed, memory, data storage, and programming ease over the earlier Commodore 64 system.  相似文献   
73.
74.
75.
Transsexuals, because of their attempts at gender reversal, offer a unique opportunity to study self-presentation, social roles, and stereotypes. The present study is a content analysis of personal advertisements of male-to-female transsexuals (TM, N =99), homosexual (HoM, N =64) and heterosexual men (HM, N =99), and heterosexual women (HW, N =99). Advertisements were coded for the presence or absence of 11 characteristics either offered or sought, based on the 1984 work of Deaux and Hanna. The content of TM personal advertisements was significantly different from those of HW, HM, or HoM. TM mentioned physical characteristics and sincerity, and requested friendship most often; HoM mentioned sexuality most often; HM offered financial security and status in the form of occupation, and listed marital status most often; and HW offered personality characteristics and attractiveness most often. Several factors may contribute to the pattern of differences observed, including the fact that TM were more likely to be seeking friendship than sexual partners, in contrast to the other three groups.  相似文献   
76.
A review of the literature was conducted to better understand the (potential) role of mental health professionals in physician-assisted suicide. Numerous studies indicate that depression is one of the most commonly encountered psychiatric illnesses in primary care settings. Yet, depression consistently goes undetected and undiagnosed by nonpsychiatrically trained primary care physicians. Noting the well-studied link between depression and suicide, it is necessary to question giving sole responsibility of assisting patients in making end-of-life treatment decisions to these physicians. Unfortunately, the use of mental health consultation by these physicians is not a common occurrence. Greater involvement of mental health professionals in this emerging and debated area is advocated. Beyond describing mental health professionals' role in the assessment of patient competency or decision making capacity, other areas of potential involvement are described. A discussion of ethical principles relevant to this area follows, along with comments on the training necessary to adequately serve patient needs.  相似文献   
77.
78.
Subjects were 288 adolescents and adults with end-stage renal disease who were candidates for kidney transplantation, a group identified at risk for noncompliance. The purpose was to examine racial and ethnic variations in coping—variables that may underlie noncompliance and impact upon health outcome. Secondarily, the relationship between depression and particular styles of coping was investigated. Race/Ethnicity was divided into three categories: Black/Non-Hispanic, White/Non-Hispanic, and Hispanic. Coping and depression were assessed using the COPE and Beck Depression Inventory, respectively. Results indicated that Hispanic and Black subjects were more likely to use maladaptive styles of coping and less likely to use adaptive coping than were White subjects and that Black subjects reported more physical symptoms of depression. These findings point to possible mechanisms underlying the occurrence of noncompliance and resulting poorer health outcome for individuals of different racial and ethnic groups.  相似文献   
79.
The possibility of using prerecorded words and 2-sec. delayed speech feedback as reinforcement in the reconditioning of intelligible verbal responses in a chronic, neologistic schizophrenic patient was investigated. A test situation was devised which involved daily presentation of 100 stimulus word-picture cards to elicit verbal responses. The results indicated that both singly presented prerecorded words and delayed speech feedback apparently strengthened correct and intelligible verbal responding.  相似文献   
80.
A method for simulating non-normal distributions   总被引:11,自引:0,他引:11  
A method of introducing a controlled degree of skew and kurtosis for Monte Carlo studies was derived. The form of such a transformation on normal deviates [X N(0, 1)] isY =a +bX +cX 2 +dX 3. Analytic and empirical validation of the method is demonstrated.This work was done while the author was at the University of Illinois at Champaign-Urbana.  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