全文获取类型
收费全文 | 587篇 |
免费 | 13篇 |
国内免费 | 1篇 |
专业分类
电工技术 | 7篇 |
化学工业 | 259篇 |
金属工艺 | 35篇 |
机械仪表 | 2篇 |
建筑科学 | 9篇 |
矿业工程 | 5篇 |
能源动力 | 10篇 |
轻工业 | 13篇 |
水利工程 | 1篇 |
石油天然气 | 32篇 |
无线电 | 14篇 |
一般工业技术 | 115篇 |
冶金工业 | 68篇 |
原子能技术 | 11篇 |
自动化技术 | 20篇 |
出版年
2022年 | 20篇 |
2021年 | 32篇 |
2020年 | 11篇 |
2019年 | 7篇 |
2018年 | 23篇 |
2017年 | 24篇 |
2016年 | 15篇 |
2015年 | 9篇 |
2014年 | 22篇 |
2013年 | 25篇 |
2012年 | 22篇 |
2011年 | 20篇 |
2010年 | 16篇 |
2009年 | 27篇 |
2008年 | 17篇 |
2007年 | 16篇 |
2006年 | 8篇 |
2005年 | 8篇 |
2004年 | 11篇 |
2003年 | 11篇 |
2002年 | 10篇 |
2001年 | 4篇 |
2000年 | 7篇 |
1999年 | 4篇 |
1998年 | 7篇 |
1997年 | 6篇 |
1996年 | 8篇 |
1995年 | 10篇 |
1993年 | 10篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 10篇 |
1987年 | 8篇 |
1986年 | 4篇 |
1985年 | 7篇 |
1984年 | 11篇 |
1983年 | 6篇 |
1981年 | 6篇 |
1980年 | 12篇 |
1979年 | 5篇 |
1978年 | 14篇 |
1977年 | 9篇 |
1976年 | 14篇 |
1975年 | 9篇 |
1974年 | 8篇 |
1973年 | 10篇 |
1972年 | 9篇 |
1970年 | 4篇 |
1968年 | 7篇 |
1966年 | 3篇 |
排序方式: 共有601条查询结果,搜索用时 437 毫秒
1.
Combustion, Explosion, and Shock Waves - Results of a numerical study of mixing, ignition, and combustion of a cold hydrogen jet propagating along the lower wall of a channel parallel to a... 相似文献
2.
3.
Yu. F. Patrakov E. S. Pavlusha N. I. Fedorova Yu. A. Strizhakova 《Solid Fuel Chemistry》2008,42(1):10-13
The results of the thermal solution of oil shale in benzene in a flow unit under supercritical conditions are reported. It was found that the conversion of shale organic matter into liquid products increased by a factor of 2.5 with an increase in the solvent pressure from 5 to 15 MPa. 相似文献
4.
A test has been devised that allows one to determine the work of adhesion and wettability in a system composed of aluminum nitride ceramics with a liquid metal without the need for experimental examination. A correlation is examined between the work of adhesion on the one hand and that criteria or others on the other that have been proposed by various researchers. Forecasts are made for the work of adhesion and wetting angle for a series of metals that have not been examined previously. An experimental check has been made on the forecast adhesion activity for some elements. 相似文献
5.
6.
The authors assessed the method for life-time study of the biomechanical characteristics of ocular tissues in 281 children (562 eyes) aged 7 to 14 years. The method for assessing the biomechanics of the eyelids is described. In detail. The rates of propagation of acoustic waves in normal tissue and in 1.0 to 6.0 diopters myopia are presented. A correlation has been revealed between the increase of the velocity of acoustic surface waves, propagating in the horizontal direction in the internal segment of the orbital area of the upper eyelids, and the value of clinical refraction in myopia. The authors consider clinical signs of myopia-screwing up one's eyes and a wider lid slit-from a biomechanical viewpoint. 相似文献
7.
Metal Science and Heat Treatment - 相似文献
8.
9.
V. T. Troshchenko P. V. Yasnii V. V. Pokrovskii B. T. Timofeev V. A. Fedorova 《Strength of Materials》1988,20(12):1552-1558
1. | Prestraining has an ambiguous effects on the FCG rate in steels 15Kh1MFA (I) and 15Kh2MFA (II). With increase in prestraining there is a decrease in the FCG rate in the threshold region of the KDFF of steel 15Kh2MFA (I) and also in the middle section for steel 15Kh2MFA (II). However, in the threshold region of the KDFF of steel 15Kh2MFA (II) FCG increases. |
2. | An increase in the level of prestraining for steels 15Kh2MFA (I) and 15Kh2MFA (II) leads to an increase of the SIF during opening of the crack. Due to this, the KDFF of these steels when plotted in the coordinates log V–log Keff is invariant relative to the degree of prestraining. |
10.
Galina M. Viryasova Ekaterina A. Golenkina Tibor Hianik Nataliya V. Soshnikova Nina G. Dolinnaya Tatjana V. Gaponova Yulia M. Romanova Galina F. Sudina 《International journal of molecular sciences》2021,22(5)
Neutrophil-mediated innate host defense mechanisms include pathogen elimination through bacterial phagocytosis, which activates the 5-lipoxygenase (5-LOX) product synthesis. Here, we studied the effect of synthetic oligodeoxyribonucleotides (ODNs), which mimic the receptor-recognized sites of bacterial (CpG-ODNs) and genomic (G-rich ODNs) DNAs released from the inflammatory area, on the neutrophil functions after cell stimulation with Salmonella typhimurium. A possible mechanism for ODN recognition by Toll-like receptor 9 (TLR9) and RAGE receptor has been proposed. We found for the first time that the combination of the magic peptide LRR11 from the leucine-rich repeat (LRR) of TLR9 with the CpG-ODNs modulates the uptake and signaling from ODNs, in particular, dramatically stimulates 5-LOX pathway. Using thickness shear mode acoustic method, we confirmed the specific binding of CpG-ODNs, but not G-rich ODN, to LRR11. The RAGE receptor has been shown to play an important role in promoting ODN uptake. Thus, FPS-ZM1, a high-affinity RAGE inhibitor, suppresses the synthesis of 5-LOX products and reduces the uptake of ODNs by neutrophils; the inhibitor effect being abolished by the addition of LRR11. The results obtained revealed that the studied peptide-ODN complexes possess high biological activity and can be promising for the development of effective vaccine adjuvants and antimicrobial therapeutics. 相似文献