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   4099篇
  免费   114篇
  国内免费   1篇
电工技术   25篇
综合类   3篇
化学工业   617篇
金属工艺   18篇
机械仪表   32篇
建筑科学   202篇
矿业工程   85篇
能源动力   55篇
轻工业   433篇
水利工程   26篇
石油天然气   6篇
无线电   117篇
一般工业技术   428篇
冶金工业   1707篇
原子能技术   9篇
自动化技术   451篇
  2022年   34篇
  2021年   64篇
  2020年   34篇
  2019年   48篇
  2018年   50篇
  2017年   60篇
  2016年   74篇
  2015年   53篇
  2014年   58篇
  2013年   216篇
  2012年   144篇
  2011年   186篇
  2010年   169篇
  2009年   153篇
  2008年   199篇
  2007年   198篇
  2006年   143篇
  2005年   168篇
  2004年   136篇
  2003年   155篇
  2002年   126篇
  2001年   97篇
  2000年   84篇
  1999年   99篇
  1998年   82篇
  1997年   86篇
  1996年   99篇
  1995年   75篇
  1994年   85篇
  1993年   99篇
  1992年   96篇
  1991年   37篇
  1990年   84篇
  1989年   68篇
  1988年   70篇
  1987年   71篇
  1986年   72篇
  1985年   61篇
  1984年   53篇
  1983年   48篇
  1982年   42篇
  1981年   32篇
  1980年   21篇
  1979年   33篇
  1978年   29篇
  1977年   14篇
  1976年   19篇
  1975年   17篇
  1974年   13篇
  1973年   16篇
排序方式: 共有4214条查询结果,搜索用时 15 毫秒
251.
252.
Psychologically traumatized people exhibit delayed color naming of trauma words in the emotional Stroop task. Four groups of participants were asked to color name positive words, neutral words, and trauma words; these groups included 15 women who believed that they harbored repressed memories of childhood sexual abuse (CSA), 13 women who reported recovered memories of CSA, 15 women who had never forgotten their CSA, and 12 women who had never been abused. Repressed-memory participants exhibited patterns of interference indistinguishable from those of the nonabused control group participants. Irrespective of group membership, the severity of self-reported posttraumatic stress disorder symptoms was the only significant predictor of trauma-related interference, r(48)?=?.30?, p?  相似文献   
253.
S. Goldberg, J. Grusec, and J. M. Jenkins (see record 1999-15264-001) provided a thorough review of J. Bowlby's (1982) work and offered a persuasive argument to consider confidence in protection as the roots of the parent-child attachment system. In an attempt to explore implications of their work, confidence in protection is examined from a developmental psychopathology perspective, with issues highlighted specifically about the role of family functioning, as well as the notion of risk and protection mechanisms. Questions are raised in the spirit of responding to and extending S. Goldberg et al.'s (1999) thought-provoking analysis. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
254.
The integration of therapeutic jurisprudence (TJ) with preventive law (PL) offers a uniquely satisfying and humanistic way of practicing law. The author uses the psychological data on the personality characteristics of lawyers to argue that TJ/PL is particularly well suited for lawyers with certain personality traits atypical of lawyers generally. These traits reflect altruistic, humanistic, or interpersonally oriented values; 2 of these atypical traits have been empirically linked to career dissatisfaction among lawyers. Because of the pervasiveness of the problem of lawyer job dissatisfaction, solutions are needed. TJ/PL is more than simply an alternative way of practicing law; it may actually hold the key to solving some of the problems currently besieging the legal profession. (PsycINFO Database Record (c) 2011 APA, all rights reserved)  相似文献   
255.
Partners in romantic relationships provided reports on perceived changes in their love, commitment, and satisfaction and completed contemporaneous scales on the same relationship phenomena multiple times over several years. At each wave of the longitudinal study, participants whose relationships had remained intact perceived that their love and related phenomena had increased since they had last participated in the study. However, their scores on contemporaneous scales did not generally increase over time. Analyses indicated that participants' reports of change were related to actual change in love, commitment, and satisfaction scores and with future relationship stability. Furthermore, participants who experienced a breakup during the longitudinal study reported an overall decrease in their positive affect in the months prior to the breakup. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
256.
There is a long and varied usage of self-help housing policy in South Africa, dating from colonial times when Africans were dumped in locations and left to build their own housing, to the present post apartheid reconstruction. The paper documents and periodises the adoption of self-help strategies for housing the African population of South African cities throughout the 20th century. Exploration of the practice of self-help housing practices in Johannesburg suggests that owner construction is a prevailing method of social engineering, whose acceptance or rejection reflects perceived political and economic advantages for the state and the private sector, and is not a simple response to a shortage of affordable shelter among the poor.  相似文献   
257.
Generic utterances (e.g., "Cows say 'moo"') have 2 distinctive semantic properties: (a) Generics are generally true, unlike indefinites (e.g., "Bears live in caves" is generic; "I saw some bears in the cave" is indefinite), and (b) generics need not be true of all category members, unlike universal quantifiers (e.g., all, every, each). This article examined whether preschool children and adults appreciate both these features, using a comprehension task (Study 1) and an elicited production task (Study 2). In both tasks, 4-year-old children--like adults--treated generics as distinct from both indefinites ("some") and universal quantifiers ("all"). In contrast, 3-year-olds did not differentiate among generics, "all," and "some." By 4 years of age, generics emerge as a distinct semantic device. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
258.
Examined the effects of age differences in retention of information about specific concept members on 40 older adults' (mean age 72.3 yrs) and 40 younger adults' (mean age 20.6 yrs) ability to abstract central tendency information. The mean Wechsler Adult Intelligence Scale—Revised (WAIS—R) Vocabulary scaled score for the young adults was significantly lower than that of the older adults. Ss were presented with a series of visual patterns that were organized around a prototype and were then presented with these same patterns plus a set of new patterns varying in prototype similarity in a recognition test. It was found that young Ss retained more information about specific acquisition set exemplars, which resulted in slightly different recognition responses for new patterns. However, the recognition behavior of both young and older Ss appeared to be governed by the same rules. It is suggested that the organization of conceptual information does not change with age but that the poorer retention of specific item information in older adults may result in a less complete representation. (14 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
259.
Compared the relative effectiveness of 2 interventions in the treatment of marital discord: a cognitive-behavioral intervention that focused on teaching problem-solving skills and an experiential intervention that focused on emotional experiences underlying interaction patterns. 45 couples seeking therapy were randomly assigned to 1 of these treatments or to a wait-list control group. Each treatment was administered in 8 sessions by 6 experienced therapists whose interventions were monitored and rated to ensure treatment fidelity. Assessment measures included the Dyadic Adjustment Scale; Couples Therapy Alliance Scale; and tests of emotional style, target complaints, goal attainment, and intimacy. Results indicate that the perceived strength of the working alliance between couples and therapists and of general therapists effectiveness were equivalent across treatment groups and that both treatment groups made significant gains over untreated controls on measures of goal attainment, marital adjustment, intimacy levels, and target complaint reduction. The effects of the emotionally focused treatment were superior to those of the problem-solving treatment on marital adjustment, intimacy, and target complaint level. At follow-up, marital adjustment scores in the emotionally focused group were still significantly higher than those in the problem-solving group. (36 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
260.
This study examined pain sensitivity and pain modularity mechanisms (e.g., beta-endorphin levels, blood pressure) in women with premenstrual dysphoric disorder (PMDD; n=27) and healthy controls (n=27) during the follicular and luteal phases of the menstrual cycle. Physiological measures were taken during rest and ischemic pain testing. In both cycle phases, PMDD women (a) displayed lower resting cortisol and beta-endorphin levels and (b) exhibited shorter pain threshold and tolerance times and greater pain unpleasantness ratings during pain. PMDD women also reported greater pain unpleasantness and intensity and had lower beta-endorphin levels in their luteal phase and tended to display higher blood pressure levels at rest and during pain testing. Results suggest that endogenous opioids may be pathophysiologically relevant to PMDD and that the hypothalamic-pituitary-gonadal axis may modulate pain sensitivity in PMDD. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  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