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   1564篇
  免费   5篇
电工技术   3篇
化学工业   216篇
金属工艺   9篇
机械仪表   13篇
建筑科学   47篇
矿业工程   3篇
能源动力   13篇
轻工业   176篇
水利工程   17篇
石油天然气   3篇
无线电   30篇
一般工业技术   216篇
冶金工业   648篇
原子能技术   7篇
自动化技术   168篇
  2022年   15篇
  2021年   24篇
  2020年   16篇
  2019年   17篇
  2018年   9篇
  2017年   9篇
  2016年   20篇
  2015年   10篇
  2014年   23篇
  2013年   71篇
  2012年   45篇
  2011年   69篇
  2010年   48篇
  2009年   50篇
  2008年   56篇
  2007年   65篇
  2006年   76篇
  2005年   64篇
  2004年   60篇
  2003年   68篇
  2002年   56篇
  2001年   31篇
  2000年   22篇
  1999年   25篇
  1998年   35篇
  1997年   30篇
  1996年   45篇
  1995年   20篇
  1994年   28篇
  1993年   30篇
  1992年   23篇
  1991年   10篇
  1990年   27篇
  1989年   28篇
  1988年   22篇
  1987年   25篇
  1986年   26篇
  1985年   23篇
  1984年   34篇
  1983年   33篇
  1982年   15篇
  1981年   20篇
  1980年   17篇
  1979年   13篇
  1978年   22篇
  1977年   8篇
  1976年   11篇
  1975年   18篇
  1974年   12篇
  1973年   8篇
排序方式: 共有1569条查询结果,搜索用时 0 毫秒
91.
As a profession we are committed to maintaining and enhancing our competence as psychologists in order to most effectively serve the public throughout our careers. While this is a widely shared commitment among psychologists, there is considerably less consensus regarding how best to accomplish this goal. This dilemma is examined from the ethical, educational and legal perspectives. The American Psychological Association (APA) Ethics Code clearly articulates that competence is an ethical duty, although there is little guidance provided in the code as to how to meet this standard. As a profession we have tended to focus on the construct of life-long learning and we have incorporated this principle into our education and training standards. In fact, APA accreditation requires that doctoral programs inculcate this value into our foundational training. The majority of Psychology Licensing Boards have addressed this issue through the endorsement of mandatory continuing education requirements that primarily focus on hours and the content or structure of approved programs. Potential limitations to our ability to effectively self-assess our professional training needs are discussed and several innovative models are presented for integrating effective self-assessment and continuing education. Three invited experts provide commentaries that further explore the challenges and dilemmas posed by the ethical, legal and professional duty to maintain and enhance competence throughout our professional careers. These commentaries broaden the considerations, provide practical suggestions from other professions and provide a vision for the future. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
92.
Project-specific dispute resolution ladders (DRLs) are typically implemented in construction projects to resolve issues arising between the project participants. The DRL typically consists of single or multiple alternative dispute resolution (ADR) techniques to address construction issues at the three levels of escalation: conflicts; disputes; and claims. However, a DRL requires significant investments to cover the direct costs incurred in-house by the project participants or, externally, if construction specialists and lawyers are recruited to assist in the resolution. Thus, the benefits of the DRL implementation in a construction project must outweigh its costs for the implementation to be worthwhile. This paper presents a methodology to study the effect of different resolution strategies on the value of the investment in a DRL using option/real option theories from financial engineering, process centric modeling, and system dynamics methodology. Of particular interest in this paper is the integration of these research methodologies into a computer model to support the evaluation of the DRL investment in a particular construction project by taking into account the characteristics of (1) the project and (2) the different ADR techniques chosen for the DRL implementation. Finally, an example is presented to illustrate the application of the computer model in a real construction project. The results of the simulation serve two main purposes. First, the results of the simulation are used to verify the intended model behavior in terms of proper integration of the three methodologies (i.e., real options, process centric, and system dynamics) in one computer system. Second, the model application to a real construction project using actual project data illustrates the potential of the model in providing the project participants with information related to the expected number of claims and change orders resolved at each level of the DRL, the change in the expected savings during the construction phase, and finally the value of the investment from the perspective of the project owner.  相似文献   
93.
Investigated the relationship between cognitive development, as measured by changes in the Moral Development Scale, and long-term reconstructive memory in 24 15–33 yr old females. The hypothesis that the past is reconstructed to conform with current developmental stages was examined. Results indicate that when developmental gains were made over a 1-yr interval, Ss used a higher stage perspective to reconstruct the decision making involved in resolving a problematic pregnancy and, hence, reconstructed the events in different terms than were originally presented. When developmental gains were not made over a 1-yr interval, Ss reconstructed the events in the same terms as originally presented. Further analysis indicated that those Ss who made developmental gains also referred to a phenomenon of "memory loss." Results support the hypothesis that memory is reconstructive rather than reproductive. (17 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
94.
Studied the influence of sex-role identity on the career involvement of 70 25–45 yr old professional women who were members of dual-career families that included young children. As predicted, Ss categorized as masculine on the Personality Research Form, ANDRO scales, were employed a significantly greater proportion of time after having children than Ss categorized as feminine. In addition, the more equalitarian the marriage, the more likely S was to continue her career participation after having children. Regardless of employment status and the equalitarianism of the marriage, Ss reported that they spent significantly more time alone with their children than their husbands did. Implications for various counseling situations are noted. (25 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
95.
36 3-mo-old infants interacted with their mothers under conditions in which they could see and hear their mothers (correlated auditory plus visual information: A?+?V), see but not hear their mothers (V), and hear but not see their mothers (A); the latter 2 conditions are termed perceptual paradox. The interactions were videotaped, and the Ss' behavior was judged by naive observers who used a subjective 7-point rating scale of infant affect. For 2 groups of Ss, 3 1-min presentations of the A?+?V condition were alternated with 3 1-min presentations of either A (Group 1) or V (Group 2) conditions. In both groups, Ss were judged as being more distressed during unimodal presentations than during bimodal presentations. In a 3rd group, unimodal (A) presentations were alternated with unimodal (V) presentations. Ss in this group were significantly more distressed when they could hear but not see their mothers than when they could see but not hear their mothers. Results demonstrate the suitability of global subjective ratings of affective state in studies of infant perception. (17 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
96.
97.
Examined the adequacy of L. Kohlberg's (1971) cognitive-developmental model as a representation of female moral reasoning. Specifically, the claims of C. Gilligan (1982) that there are 2 conceptions of morality—one described as a morality of justice, on which Kohlberg's scheme is based, and one described as a morality of care, seen by Gilligan as more representative of female thinking about moral conflict—were studied. 101 male and 101 female undergraduates filled out a self-report questionnaire on moral dilemmas they had experienced. They then rated their use of both justice and care orientations in resolving those dilemmas. Ss also completed the Interpersonal Disposition Inventory and semantic differential items. The use of the 2 orientations was examined in relationship to S gender, sex role, and perceptions of the 2 orientations. Few significant differences were obtained, except that female Ss were more consistent in their use of a care orientation and male Ss were more consistent in their use of a justice orientation. More feminine males were more likely to report the use of a care orientation than less feminine males. Male and female reasoning about moral conflict is examined in the light of these 2 perspectives, and the relationship of sex roles to endorsement of each perspective is discussed. (23 ref) (PsycINFO Database Record (c) 2011 APA, all rights reserved)  相似文献   
98.
25 girls and 31 boys (aged 4–9 yrs) were presented with novel objects in 3 sex-labeled boxes and were given 6 min to explore the objects. Memory for information about the objects was tested 1 wk later. Results show that Ss tactually explored novel objects labeled for their own sex more than similar objects labeled for the other sex and remembered more detailed information about own-sex than other-sex objects. Furthermore, regardless of labeling condition, Ss recalled the sex-typed label applied by the experimenter to each object. As expected from the C. L. Martin and C. F. Halverson, Jr. (see record 1982-05576-001) schematic processing model, an incentive to remember did not improve recall in any labeling condition. The sex-typed labeling effects on exploration occurred primarily among the older children, whereas the effects on recall appeared among the younger and older boys and the younger girls. The results suggest that sex stereotypes restrict children's behavior by limiting their competence rather than their performance. Findings are discussed in relation to an earlier study by the 1st author and R. C. Endsley (see record 1983-32397-001). (22 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
99.
100.
Four actuarial instruments for the prediction of violent and sexual reoffending (the Violence Risk Appraisal Guide [VRAG], Sex Offender Risk Appraisal Guide [SORAG], Rapid Risk Assessment for Sex Offender Recidivism [RRASOR], and Static-99) were evaluated in 4 samples of sex offenders (N = 396). Although all 4 instruments predicted violent (including sexual) recidivism and recidivism known to be sexually motivated, areas under the receiver operating characteristic (ROC) were consistently higher for the VRAG and the SORAG. The instruments performed better when there were fewer missing items and follow-up time was fixed, with an ROC area up to .84 for the VRAG, for example, under such favorable conditions. Predictive accuracy was higher for child molesters than for rapists, especially for the Static-99 and the RRASOR. Consistent with past research, survival analyses revealed that those offenders high in both psychopathy and sexual deviance were an especially high-risk group. (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