全文获取类型
收费全文 | 2928篇 |
免费 | 72篇 |
国内免费 | 3篇 |
专业分类
电工技术 | 38篇 |
综合类 | 1篇 |
化学工业 | 387篇 |
金属工艺 | 53篇 |
机械仪表 | 47篇 |
建筑科学 | 89篇 |
矿业工程 | 7篇 |
能源动力 | 39篇 |
轻工业 | 322篇 |
水利工程 | 16篇 |
石油天然气 | 6篇 |
无线电 | 200篇 |
一般工业技术 | 360篇 |
冶金工业 | 1022篇 |
原子能技术 | 17篇 |
自动化技术 | 399篇 |
出版年
2022年 | 18篇 |
2021年 | 31篇 |
2020年 | 32篇 |
2019年 | 35篇 |
2018年 | 37篇 |
2017年 | 36篇 |
2016年 | 33篇 |
2015年 | 32篇 |
2014年 | 47篇 |
2013年 | 122篇 |
2012年 | 79篇 |
2011年 | 111篇 |
2010年 | 88篇 |
2009年 | 77篇 |
2008年 | 102篇 |
2007年 | 110篇 |
2006年 | 94篇 |
2005年 | 66篇 |
2004年 | 67篇 |
2003年 | 67篇 |
2002年 | 68篇 |
2001年 | 45篇 |
2000年 | 54篇 |
1999年 | 70篇 |
1998年 | 243篇 |
1997年 | 156篇 |
1996年 | 107篇 |
1995年 | 71篇 |
1994年 | 67篇 |
1993年 | 74篇 |
1992年 | 38篇 |
1991年 | 30篇 |
1990年 | 29篇 |
1989年 | 37篇 |
1988年 | 27篇 |
1987年 | 25篇 |
1986年 | 28篇 |
1985年 | 39篇 |
1984年 | 26篇 |
1983年 | 30篇 |
1982年 | 39篇 |
1981年 | 30篇 |
1980年 | 36篇 |
1979年 | 26篇 |
1978年 | 22篇 |
1977年 | 24篇 |
1976年 | 46篇 |
1975年 | 23篇 |
1972年 | 12篇 |
1963年 | 13篇 |
排序方式: 共有3003条查询结果,搜索用时 15 毫秒
11.
The retiring editor of the Journal of Family Psychology (1997-2003) offers final thoughts on the passing on of the editorship and extends thanks to journal associates. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
12.
13.
Button Cathryn M.; Grant Malcolm J.; Hannah T. Edward; Ross Abraham S. 《Canadian Metallurgical Quarterly》1993,25(2):230
Two studies identified and labeled the dimensions that people use to judge others' attitudes. In the 1st study, 50 male and 50 female undergraduates viewed pairs of attitude statements drawn from 1 or 2 large sets. For each pair of statements, Ss judged whether or not a person who agreed with one statement in the pair would be likely to agree with the other. The dimensions of liberalism and traditional values were found to underlie perceived attitudes. Validity was confirmed in a 2nd study with 60 male and 60 female undergraduates who rated the characteristics of hypothetical people who agreed strongly with particular statements. Results suggest that there is a common structure to people's perceptions of others' attitudes. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
14.
15.
Examines, in the context of cancer illness, S. E. Taylor and J. D. Brown's (see record 1988-16903-001) claim that mental health is to a degree predicated on illusory beliefs about the self, one's control, and the future. The Heroic Model (HM), a stance toward cancer characterized by belief that positive thoughts and feelings, a fighting spirit, and an optimistic outlook will promote cancer remission, is presented as paradigmatic of Taylor and Brown's thesis. Strong and weak formulations of the HM (the former affirming a direct influence of mental states over physical processes, and the latter affirming indirect effects only) are examined with respect to their potential adaptive value as true or false beliefs, with different consequences for well-being. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
16.
17.
18.
Comments on an article by T. R. Elliott and E. K. Byrd (see record 1987-23075-001), in which the authors conducted a citation analysis of articles in Rehabilitation Psychology, Volumes 27-29. They claimed to identify influential authors and publications useful for training and research in rehabilitation psychology. Their method of citation analysis, however, appears to have distorted their results. Crisp discusses the problems with their methodology, and makes suggestions for using a different citation method, using more than three volumes of the journal, and including other journals in the analysis. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
19.
Several samples of exhaust diesel soot are investigated by inverse gas chromatography and linear solvation energy relationship (LSER) modelling according to their soluble organic fraction content and their time of exposure in oxidative conditions. The results demonstrate the evolution of the adsorptive properties of the studied materials towards volatile compounds during the oxidation under NO2. 相似文献
20.
There is often a need to approximate integrals of highly oscillatory functions when studying scattering and diffraction of electromagnetic waves. This paper presents a method of estimating certain types of these integrals by evaluating one interpolating function and performing one or two relatively easy numerical integrations. The method is demonstrated for the case of a Fresnel integral 相似文献