全文获取类型
收费全文 | 390篇 |
免费 | 0篇 |
专业分类
电工技术 | 6篇 |
化学工业 | 45篇 |
金属工艺 | 14篇 |
机械仪表 | 21篇 |
建筑科学 | 3篇 |
矿业工程 | 3篇 |
轻工业 | 5篇 |
水利工程 | 4篇 |
石油天然气 | 26篇 |
无线电 | 8篇 |
一般工业技术 | 64篇 |
冶金工业 | 162篇 |
原子能技术 | 21篇 |
自动化技术 | 8篇 |
出版年
2022年 | 5篇 |
2021年 | 7篇 |
2018年 | 12篇 |
2017年 | 7篇 |
2016年 | 8篇 |
2015年 | 7篇 |
2014年 | 8篇 |
2013年 | 8篇 |
2012年 | 15篇 |
2011年 | 8篇 |
2010年 | 12篇 |
2009年 | 10篇 |
2008年 | 6篇 |
2007年 | 14篇 |
2006年 | 10篇 |
2005年 | 4篇 |
2004年 | 4篇 |
2003年 | 4篇 |
2002年 | 7篇 |
2001年 | 6篇 |
2000年 | 15篇 |
1999年 | 6篇 |
1998年 | 38篇 |
1997年 | 19篇 |
1996年 | 10篇 |
1995年 | 12篇 |
1994年 | 7篇 |
1993年 | 9篇 |
1992年 | 4篇 |
1991年 | 6篇 |
1989年 | 4篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1985年 | 5篇 |
1984年 | 4篇 |
1983年 | 5篇 |
1982年 | 2篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 5篇 |
1977年 | 5篇 |
1976年 | 14篇 |
1973年 | 2篇 |
1972年 | 5篇 |
1971年 | 4篇 |
1970年 | 4篇 |
1969年 | 3篇 |
1968年 | 4篇 |
1967年 | 4篇 |
1965年 | 3篇 |
排序方式: 共有390条查询结果,搜索用时 0 毫秒
1.
I. F. Kurunov V. N. Loginov S. S. Lyapin N. S. Polyakov V. N. Titov 《Metallurgist》2007,51(7-8):425-433
The use of schungite as a partial replacement for coke is practiced in Russia at a number of metallurgical plants, both in
the production of foundry iron (its primary use) and in making conversion pig iron. The largest amount of coke is replaced
when foundry iron is being made, the replacement coefficient in this case having a value within the range 0.8–1.3. Studies
that included continuous monitoring of the temperature of the carbon blocks in blast furnaces with volumes of 1719, 3200,
and 5580 m3 unambiguously demonstrate that the thickness of the slag crust in blast furnaces increases with the use of schungite. Protecting
the lining of the hearth through the use of schungite is also accompanied by a decrease in coke consumption.
__________
Translated from Metallurg, No. 8, pp. 53–57, August, 2007. 相似文献
2.
The field evaporation of carbidized tungsten (ribbed crystals) was studied by the atom probe method at various temperatures of the sample in the regions of cryogenic, room, and elevated (1300–1600 K) temperatures. For a high pulsed (not less than 40%) component in the evaporating field, the room-temperature field evaporation mass spectra correctly reflect the surface composition of the evaporated sample. The mass spectra reveal a large number of molecular and polymerized (cluster) ions. Data from field ion desorption microscopy indicate that high-temperature field evaporation of a ribbed crystal proceeds via ion emission from walking and merging thermal-field microroughnesses. 相似文献
3.
S. V. Loginov 《Technical Physics Letters》2007,33(10):805-808
It is shown that the process of magnetic field penetration into the plasma bridge in a plasma opening switch is determined by the field diffusion near the magnetic piston, followed by the convective transport of magnetic field in the bridge. This transport is due to the field being “frozen in” to the flow of plasma behind the front of a shock wave, which is formed in the plasma accelerated by the magnetic field pressure. 相似文献
4.
L. V. Ravichev A. V. Bespalov V. Ya. Loginov 《Theoretical Foundations of Chemical Engineering》2008,42(3):314-323
A mathematical model for calculating the viscous properties of concentrated suspensions characterized by particle sizes of 30 to 800 µm), solids volume fractions of 1 to 70 vol %, different particle-size distributions, and a shear-rate range of 0.16 to 437 s?1, which can describe the time evolution of the properties, is proposed. The model can be applied to calculating the viscous properties of catalyst oxide pastes, particulate-filled polymeric pastes, and the like. 相似文献
5.
6.
ShSh Eliava IuM Filatov OB Sazonova AIu Lubnin IN Rudnev AS Khe?reddin 《Canadian Metallurgical Quarterly》1996,41(4):3-6
Internal carotid aneurysms in the ophthalmic area presents a challenge in cerebrovascular neurosurgery. The study was undertaken to provide evidence for the application of intravascular aspiration during direct surgical interventions and to outline their variants used at the N. N. Burdenko Institute of Neurosurgery. The study included 4 (3 females and 1 male) patients with large and giant internal carotid aneurysms of parasphenoidal site who were treated at the Institute. Clipping of the aneurysmal neck was made by employing intravascular blood aspiration from the aneurysm. The technique proved to be effective in proximal monitoring the carotid artery at surgery. It substantially reduced aneurysmal blood flow and wall tension, thus favouring aneurysmal dissection to make clipping. 相似文献
7.
RIa Vovin IIa Gurovich OF Eryshev SG Za?tsev AIu Magalif 《Canadian Metallurgical Quarterly》1977,77(5):743-749
The authors studied the effectiveness of out-patient treatment by Moditen-Deppt of 128 schizophrenic patients. A comparison of the previous remissions appearing during usual pharmacotherapy and remissions seen during Moditen-Depot treatment depicted statistically significant differences, indicating a distinct prevention of exacerbations due to this preparation, an increase in the duration and improved quality of remissions. Such improved remissions were expressed in lesser severity, in a decrease of psychopathological disturbances, changes qualified as a "mollification of a defect" and an improvement of some socio-clinical indices. 相似文献
8.
The activity of glutamate dehydrogenase (EC 1.41.1.3) is studied in homogenates and subcellular fractions of five limbic structures: regio superior, regio inferior of hippocampus, fascia dentata, septum and corpora mamillaria. The lowest activity of the enzyme is found in regio superior of hippocampus. 80% of the total enzyme activity of primary fractions is found in "crude" mitochondria. After centrifugation of the latter within the linear sucrose density gradient the distribution of the enzume activity is similar for different structures and the highest activity is found in the region of sucrose molarity from 1.44 up to 1.50 M which corresponds to the mitochondria distribution region. 50% of the total found activity is in the fraction enriched by mitochondria, 30% is in the fraction enriched by nerve endings with the high activity of glutamate decarboxylase. It was found for different fractions that 1 mM of ADF with 0.2 mM NAD-H+ produces about 10-fold increase in the enzyme activity. Pyridoxal-5'-phosphate inhibits the enzyme from inactivation. The results are discussed in connection with the possible role of pyridoxal-5'-phosphate in regulation of the glutamate dehydrogenase activity in vivo. 相似文献
9.
The microroughness evolution of the inner surface of copper pipes under drawing is considered. The roughness parameter R a is measured on the internal surface of pipes after pressing and drawing. It is revealed that R a is minimal for hot-pressed pipes. Deformation by drawing to a logarithmic degree of deformation in 0.417 is accompanied by a rise in average parameter R a from 0.20 to 6.16 μm, i.e., approximately 30 times. The highest growth rate of R a is noted in the early pass of drawing. The increase in the dispersion of the value measured over drawing pass is also ascertained. The resulting phenomenon is explained by the effect of the copper grain turn. 相似文献
10.
The wear pattern of working rolls that accompanies the hot graded rolling of electric copper in a combined process of casting and deformation has been studied. The depth of the worn layer over the contour of grooves in the first four rolling passages were measured. The increased wear of the grooves that roll the metal at the highest temperature has been revealed. The areas of wear localization over the contour of grooves have been stated. A conclusion has been drawn on the significant differences in the wear pattern during the rolling of steel and copper. It has been revealed that wear during electric copper rolling happens due to the flame erosion of the surface layers of rolls made from heat-resistant steel, as well as due to the intensive adhesion of copper to them; furthermore, there is hardly any mechanical or abrasive wear. Recommendations on the need to develop a special material for manufacturing rolls just for copper rolling have been made. 相似文献