全文获取类型
收费全文 | 22040篇 |
免费 | 2452篇 |
国内免费 | 1853篇 |
专业分类
电工技术 | 2180篇 |
技术理论 | 5篇 |
综合类 | 2235篇 |
化学工业 | 320篇 |
金属工艺 | 48篇 |
机械仪表 | 348篇 |
建筑科学 | 1021篇 |
矿业工程 | 505篇 |
能源动力 | 332篇 |
轻工业 | 380篇 |
水利工程 | 404篇 |
石油天然气 | 165篇 |
武器工业 | 102篇 |
无线电 | 4402篇 |
一般工业技术 | 692篇 |
冶金工业 | 946篇 |
原子能技术 | 48篇 |
自动化技术 | 12212篇 |
出版年
2024年 | 87篇 |
2023年 | 274篇 |
2022年 | 489篇 |
2021年 | 688篇 |
2020年 | 685篇 |
2019年 | 500篇 |
2018年 | 440篇 |
2017年 | 567篇 |
2016年 | 650篇 |
2015年 | 739篇 |
2014年 | 1956篇 |
2013年 | 1516篇 |
2012年 | 1997篇 |
2011年 | 2236篇 |
2010年 | 1648篇 |
2009年 | 1694篇 |
2008年 | 1717篇 |
2007年 | 1864篇 |
2006年 | 1573篇 |
2005年 | 1304篇 |
2004年 | 1001篇 |
2003年 | 892篇 |
2002年 | 548篇 |
2001年 | 379篇 |
2000年 | 260篇 |
1999年 | 144篇 |
1998年 | 89篇 |
1997年 | 62篇 |
1996年 | 57篇 |
1995年 | 32篇 |
1994年 | 39篇 |
1993年 | 21篇 |
1992年 | 22篇 |
1991年 | 15篇 |
1990年 | 12篇 |
1989年 | 12篇 |
1988年 | 10篇 |
1987年 | 5篇 |
1986年 | 7篇 |
1985年 | 26篇 |
1984年 | 18篇 |
1983年 | 16篇 |
1982年 | 13篇 |
1981年 | 8篇 |
1980年 | 3篇 |
1979年 | 6篇 |
1959年 | 2篇 |
1958年 | 3篇 |
1957年 | 4篇 |
1955年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
92.
No authorship indicated 《Canadian Metallurgical Quarterly》2006,61(8):811
Presents the citation for Anthony D. Wagner, who received the Award for Distinguished Scientific Early Career Contributions to Psychology (cognition and human learning) "for outstanding and innovative research on the neural basis of memory and executive control." A brief profile and a selected bibliography accompany the citation. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
93.
94.
余浩 《山东大学学报(工学版)》2003,33(3):337-340
分析了我国中医药数据分析作业方式的不足,试图通过建立网络数据分析中心,为中医药部门提供了一条实现网络化,标准化,信息化的思路. 相似文献
95.
Parental power assertion is traditionally studied in the behavioral domain--discipline triggered by the child's immediate misbehavior--but rarely in the cognitive domain--parent-child discussions of the child's past misbehavior. Maternal power assertion was observed in "do" and "don't" discipline contexts from 14 to 45 months and in the context of mother-child discourse about a recent misbehavior at 56 months. Mothers' use of power cohered across the "do," "don't," and discourse contexts, but its implications were domain specific. Power assertion in the "don't" discipline context predicted behavioral outcomes (more moral conduct at 56 and 73 months, less antisocial conduct at 73 months) but not cognitive outcomes (moral cognition at 56 and 73 months). Power assertion in the discourse context predicted less mature moral cognition but not moral or antisocial conduct. Mothers' high Neuroticism predicted more power assertion in all three contexts. Child effects were examined. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
96.
Royzman Edward B.; Cassidy Kimberly Wright; Baron Jonathan 《Canadian Metallurgical Quarterly》2003,7(1):38
This article reviews the evidence and theory pertaining to a form of perspective-taking failure--a difficulty in setting aside the privileged information that one knows to be unavailable to another party. The authors argue that this bias (epistemic egocentrism, or EE) is a general feature of human cognition and has been tapped by 2 independent and largely uncommunicating research traditions: the theory-of-mind tradition in developmental psychology and, with more sensitive probes, the "heuristics and biases" tradition in the psychology of human judgment. This article sets the stage for facilitating communication between these traditions as well as for the recognition of EE's breadth and potential interdisciplinary significance. The authors propose a life-span account and a tentative taxonomy of EE; and they highlight the interdisciplinary significance of EE by discussing its implications for normative ethics. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
97.
98.
Frischen Alexandra; Bayliss Andrew P.; Tipper Steven P. 《Canadian Metallurgical Quarterly》2007,133(4):694
During social interactions, people's eyes convey a wealth of information about their direction of attention and their emotional and mental states. This review aims to provide a comprehensive overview of past and current research into the perception of gaze behavior and its effect on the observer. This encompasses the perception of gaze direction and its influence on perception of the other person, as well as gaze-following behavior such as joint attention, in infant, adult, and clinical populations. Particular focus is given to the gaze-cueing paradigm that has been used to investigate the mechanisms of joint attention. The contribution of this paradigm has been significant and will likely continue to advance knowledge across diverse fields within psychology and neuroscience. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
99.
简要介绍了煤巷锚杆支护技术在童亭煤矿的应用推广情况 ,重点介绍了童亭煤矿在安全可靠性控制方面强化管理、优化设计、提高工艺水平和质量保证体系建设的一些经验和做法 ,并对今后发展煤巷锚杆支护技术提出了看法。 相似文献
100.