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   435篇
  免费   11篇
  国内免费   3篇
电工技术   8篇
综合类   75篇
化学工业   5篇
金属工艺   7篇
机械仪表   7篇
建筑科学   26篇
矿业工程   4篇
能源动力   3篇
轻工业   6篇
水利工程   5篇
石油天然气   6篇
无线电   25篇
一般工业技术   18篇
冶金工业   170篇
自动化技术   84篇
  2025年   1篇
  2024年   3篇
  2023年   4篇
  2022年   2篇
  2021年   7篇
  2020年   5篇
  2019年   5篇
  2018年   5篇
  2017年   6篇
  2016年   10篇
  2015年   8篇
  2014年   16篇
  2013年   16篇
  2012年   14篇
  2011年   22篇
  2010年   27篇
  2009年   39篇
  2008年   39篇
  2007年   26篇
  2006年   20篇
  2005年   19篇
  2004年   26篇
  2003年   26篇
  2002年   26篇
  2001年   10篇
  2000年   10篇
  1999年   11篇
  1998年   3篇
  1997年   2篇
  1996年   3篇
  1995年   2篇
  1994年   3篇
  1993年   3篇
  1992年   6篇
  1991年   1篇
  1990年   3篇
  1989年   2篇
  1988年   2篇
  1986年   7篇
  1985年   1篇
  1982年   2篇
  1975年   1篇
  1971年   1篇
  1965年   1篇
  1962年   1篇
  1956年   1篇
  1954年   1篇
排序方式: 共有449条查询结果,搜索用时 15 毫秒
1.
探讨了在C语言程序设计教学过程中为学生建立相应的思维模式的方法问题。针对非计算机专业学生基础差、专业性不强的特点,结合当前DIY的潮流,分析了C语言的基本结构,分析了RPGMaker中提供的技术可行性,提出通过促进学生使用RPG-Maker软件来制作游戏以建立相应的程序设计思维模式的方法,并提出具体案例供参考。实践表明,学生的程序设计思维能较快速、熟练地建立起来。  相似文献   
2.
Reviews the book, Evolution, culture and the human mind edited by M. Schaller, et al. (see record 2009-20004-000). This current volume, Evolution, culture and the human mind, follows the lead of Wundt where an attempt is made to provide a synthesis of theory and data across psychological subfields into a holistic framework. Norenzayan, Schaller, and Heine begin the volume with an overview of the scope and themes that arose from their 2004 conference at the University of British Columbia on “Mind, Culture and Evolution.” Explicit throughout this volume is an effort to bridge the “yawning chasm” between perspectives of evolutionary determinism and cultural constructionism. In doing so, there is interest in providing a rigorous multidisciplinary scientific effort to solve this foundational problem for psychology. As such this volume provides an interesting and insightful examination of the evolution of consciousness, cognition, decision-making, actions, and cultural norms in terms of collective consequences and genetic mechanisms. The volume is divided into three sections where several dialectical themes (theory/data, top-down/bottom-up, ecological/social, diversification/integration) are woven throughout. Overall the volume offers nice flow from one collection of essays to the next as themes are picked up and let go, only to return later on. This volume shows a dominance of natural science (cross-cultural) inclinations where some readers may call for more voice given to phenomenological and hermeneutical (cultural) human science contributions. Other critics may challenge the reliance upon correlational, comparative, and post hoc data to bolster claims of causality in support of various theoretical suppositions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
3.
Typically developing children understand and predict others' behavior by extracting and processing relevant information such as the logic of their actions within the situational constraints and the intentions conveyed by their gaze direction and emotional expressions. Children with autism have difficulties understanding and predicting others' actions. With the use of eye tracking and behavioral measures, we investigated action understanding mechanisms used by 18 children with autism and a well-matched group of 18 typically developing children. Results showed that children with autism (a) consider situational constraints in order to understand the logic of an agent's action and (b) show typical usage of the agent's emotional expressions to infer his or her intentions. We found (c) subtle atypicalities in the way children with autism respond to an agent's direct gaze and (d) marked impairments in their ability to attend to and interpret referential cues such as a head turn for understanding an agent's intentions. (PsycINFO Database Record (c) 2011 APA, all rights reserved)  相似文献   
4.
本文提出了一种基于思维进化算法的变压器故障诊断方法。该方法以变压器油中特征气体的含量作为输入参数,根据趋同和异化的原理进行搜素,从而得到输入和输出变量之间的对应关系。实例分析计算表明,采用该方法对变压器进行故障诊断是有效的。  相似文献   
5.
For safety reasons a maximum speed limit of 60 km/h has been applied to minor rural roads in the Netherlands since 1998. To support this structurally, a part of these roads have also received additional physical measures in a so-called “low cost design” that is expected to reduce the number of traffic casualties by 10–20%. This measure has been implemented as much as possible in an area oriented way. To measure the design's effectivity, road safety in 20 specific rural areas was studied for 5 years before changes were implemented and, on average, 3.5 years thereafter. The study examined 851 km of roads, and a control study was done on 2105 km of comparable roads with a speed limit of 80 km/h. Both the study and the control roads are managed by water boards. Results show that the measures implemented on the roads in the 60 km/h-zones had statistically significant effects (p < 0.05) on casualty accidents (−24% overall), especially at intersections (−44%). This high reduction is probably caused by the concentration of technical interventions at intersections. Both outcomes are somewhat higher than previously expected and are comparable with the outcome of a meta-analysis of safety effects on area-wide urban traffic calming schemes. However, the cost-effectiveness ratio of the 60 km/h zones measures (€33,000 per prevented KSI-casualty) is much more favourable than the ratio in urban 30 km/h-zones (€86,000 per prevented KSI-casualty).  相似文献   
6.
    
Recent interest in the development and evolution of theory of mind has provided a wealth of information about representational skills in both children and animals. According to J. Perner (1991), children begin to entertain secondary representations in the 2nd year of life. This advance manifests in their passing hidden displacement tasks, engaging in pretense and means-ends reasoning, interpreting external representations, displaying mirror self-recognition and empathic behavior, and showing an early understanding of \"mind\" and imitation. New data show a cluster of mental accomplishments in great apes that is very similar to that observed in 2-year-old humans. It is suggested that it is most parsimonious to assume that this cognitive profile is of homologous origin and that great apes possess secondary representational capacity. Evidence from animals other than apes is scant. This analysis leads to a number of predictions for future research. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
7.
成熟探区油气勘探思路及方法——以济阳坳陷为例   总被引:2,自引:2,他引:2  
经过40多年勘探,济阳坳陷整体处于较成熟一成熟勘探阶段。随着勘探程度的不断提高,隐蔽油气藏已成为主要勘探目标。经过多年的理论研究与勘探实践,胜利油田已初步形成了一套系统的隐蔽油气藏勘探理论和技术方法,而更为重要的是胜利油田勘探工作者根据勘探阶段的变化而及时作出了勘探思路和方法的调整。通过回顾济阳坳陷的勘探实践,全面阐述了成熟探区勘探工作中如何坚定信心、解放思想、探索正确的勘探思路,以及把科研工作系统化,夯实发展基础,扎实开展各项工作的勘探方法,以达到不断深化济阳坳陷隐蔽油气藏勘探工作、实现油田持续稳定发展的目标。  相似文献   
8.
蔡艳宁  叶雪梅  杨眉 《电子科技》2010,23(6):124-126
设计高质量的网络课程和教学效果评价方法,已成为网络教育的重要课题。传统的网络化课程资源对知识的呈现成线性方式,这对学习有积极的影响,但也使学习者在浏览时出现迷航或认知超载的问题。针对该问题,文中研究了概念图/思维导图在网络课程设计和教学评价中的应用,并给出了设计实例。  相似文献   
9.
为了提高网格的智能水平和协调能力以及协同分布的网格服务,支持动态的计算环境和多变的用户需求,提出了协同智能网格CIG(cooperative intelligent grid).CIG以OGSA为基础,应用分布式人工智能和分布协调控制的理论和方法来研究和解决网格中如何高效准确地协同现有的网格服务以完成所面临的任务.文中描述了CIG的概念和体系结构,从社区/联邦式政策导向型的系统结构、领域自适应的中介服务协作机制和理性化协商机制等方面构建开放动态的CIG.CIG可以有效地组织各网格实体的协调、协商和合作,提高了服务组合的自动化程度和抽象层次.  相似文献   
10.
Review of book Studies of How the Mind Publicly Enfolds into Being edited by William E. Smythe and Angelina Baydala. This volume contains the fruits of a symposium of the Western Canadian Theoretical Psychologists devoted to the topic contained in the title, though the original idea was expressed by considering "psyche and polis" (p. viii), the two Greek terms from which our conceptions of self and public largely derive. Most of the reflection does not return all the way to ancient Greece, but the essays draw deeply on historical sources, retracing the influences of contemporary thought and reminding the audience of some roads not taken. The issue and definition of self are the predominant theme. Judging from the references, the sources of inspiration for many of these essays is predominantly philosophical, with liberal borrowings from sociology, cultural studies, and political theory. Despite the complexity and range of theoretical issues discussed, the contributions are uniformly clear and engaging, a credit to authors and editors alike. (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