全文获取类型
收费全文 | 563篇 |
免费 | 10篇 |
专业分类
电工技术 | 11篇 |
综合类 | 1篇 |
化学工业 | 40篇 |
金属工艺 | 9篇 |
机械仪表 | 8篇 |
建筑科学 | 10篇 |
矿业工程 | 1篇 |
能源动力 | 7篇 |
轻工业 | 63篇 |
水利工程 | 6篇 |
石油天然气 | 2篇 |
无线电 | 48篇 |
一般工业技术 | 60篇 |
冶金工业 | 257篇 |
原子能技术 | 2篇 |
自动化技术 | 48篇 |
出版年
2021年 | 3篇 |
2020年 | 3篇 |
2018年 | 6篇 |
2017年 | 6篇 |
2016年 | 5篇 |
2015年 | 5篇 |
2014年 | 8篇 |
2013年 | 18篇 |
2012年 | 17篇 |
2011年 | 27篇 |
2010年 | 19篇 |
2009年 | 24篇 |
2008年 | 22篇 |
2007年 | 14篇 |
2006年 | 23篇 |
2005年 | 15篇 |
2004年 | 17篇 |
2003年 | 10篇 |
2002年 | 12篇 |
2001年 | 14篇 |
2000年 | 17篇 |
1999年 | 13篇 |
1998年 | 30篇 |
1997年 | 28篇 |
1996年 | 18篇 |
1995年 | 10篇 |
1994年 | 18篇 |
1993年 | 17篇 |
1992年 | 5篇 |
1991年 | 3篇 |
1990年 | 6篇 |
1988年 | 7篇 |
1987年 | 7篇 |
1986年 | 10篇 |
1985年 | 11篇 |
1984年 | 5篇 |
1983年 | 7篇 |
1980年 | 6篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1977年 | 6篇 |
1976年 | 12篇 |
1975年 | 4篇 |
1974年 | 6篇 |
1973年 | 4篇 |
1972年 | 5篇 |
1970年 | 7篇 |
1969年 | 5篇 |
1968年 | 3篇 |
1963年 | 5篇 |
排序方式: 共有573条查询结果,搜索用时 15 毫秒
1.
Jenghwa Chang Graber H.L. Ping Chen Koo Aronson R. Barbour S.-L.S. Barbour R.L. 《IEEE transactions on medical imaging》1997,16(1):68-77
Presents a model suitable for computing images of absorption cross sections of thick tissue structures illuminated at near infrared (NIR) wavelengths from tomographic projection data. Image reconstruction is accomplished by solving a system of linear equations derived from transport theory. Reconstruction results using different algebraic solvers are shown for anatomical maps of the breast, derived from magnetic resonance imaging data, containing two simulated pathologies, in which case qualitatively good reconstructions were obtained. Evaluation of magnetic resonance (MR) data to optimize NIR optical tomographic imaging methods and to assess the feasibility of a combined MR-optical measurement scheme is discussed 相似文献
2.
Two studies examined the relationship between the content of a self-threat and the attractiveness of available self-affirmations (C. M. Steele, 1988). After self-threat was induced by means of a cognitive dissonance procedure, participants' choices for affirmations were examined in order to explore whether the attractiveness of a given affirmation depends on its relevance to the threatened domain of the self-concept. The authors hypothesized that when faced with a threat to a specific self-conception or standard, individuals may forego affirmations within the threatened self-concept domain in favor of affirmations of unrelated, compensatory domains. Both studies supported this hypothesis and further suggested that such selective self-affirmation can lead individuals to modify their self-concepts by identifying with self-aspects that justify dissonant behavior and by disidentifying with the standards that such behavior violates. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
3.
4.
Y Stern M Aronson T Shpitzer O Nativ O Medalia K Segal R Feinmesser 《Canadian Metallurgical Quarterly》1995,121(9):1003-1005
OBJECTIVE: To assess the role of DNA ploidy as a predictor of radioresistance in T1 glottic carcinoma. DESIGN: Case-control study. Flow cytometric DNA ploidy measurements were performed on formalin-fixed paraffin-embedded tumor specimens from 15 patients with T1 glottic laryngeal carcinomas in whom radiotherapy had failed and from a matched group of 15 patients in whom an identical radiotherapy regimen was curative. Analysis of DNA content was performed blind to outcome of treatment. SETTING: Academic tertiary referral medical center. PARTICIPANTS: Thirty patients with clinically staged T1, N0, M0 glottic carcinoma. INTERVENTION: All patients received radiation to the larynx through opposed lateral ports at a total dose of 64 to 70 Gy. RESULTS: Ten diploid and five aneuploid histograms were found in the resistant group, and six diploid and nine aneuploid histograms were found in the radiosensitive group. This difference was not statistically significant. A trend toward a higher relapse rate after radiotherapy (62.5%) among patients with diploid tumor compared with those with aneuploid tumor (35.7%) was noted. CONCLUSIONS: DNA ploidy did not predict response to radiotherapy in patients with T1 glottic cancer, probably because of the small number of patients. A trend toward lower risk of local recurrence after radiotherapy in aneuploid tumors was noted. A larger prospective study is needed to assess the value of DNA ploidy in the treatment of early laryngeal cancer. 相似文献
5.
Barrett Lisa Feldman; Quigley Karen S.; Bliss-Moreau Eliza; Aronson Keith R. 《Canadian Metallurgical Quarterly》2004,87(5):684
People differ in the extent to which they emphasize feelings of activation or deactivation in their verbal reports of experienced emotion, termed arousal focus (AF). Two multimethod studies indicate that AF is linked to heightened interoceptive sensitivity (as measured by performance on a heartbeat detection task). People who were more sensitive to their heartbeats emphasized feelings of activation and deactivation when reporting their experiences of emotion over time more than did those who were less sensitive. This relationship was not accounted for by several other variables, including simple language effects. Implications for the role of interoception in experienced emotion and the validity of self-reported emotion are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
6.
7.
8.
9.
10.
A. Ya. Aronson 《Strength of Materials》1989,21(3):296-300
PO Leningrad Metallurgical Plant. Translated from Problemy Prochnosti, No. 3, pp. 25–28, March, 1989. 相似文献