全文获取类型
收费全文 | 744篇 |
免费 | 5篇 |
专业分类
电工技术 | 15篇 |
综合类 | 2篇 |
化学工业 | 163篇 |
金属工艺 | 67篇 |
机械仪表 | 38篇 |
建筑科学 | 10篇 |
矿业工程 | 6篇 |
能源动力 | 4篇 |
轻工业 | 10篇 |
水利工程 | 13篇 |
石油天然气 | 21篇 |
无线电 | 33篇 |
一般工业技术 | 171篇 |
冶金工业 | 78篇 |
原子能技术 | 91篇 |
自动化技术 | 27篇 |
出版年
2022年 | 20篇 |
2021年 | 28篇 |
2020年 | 12篇 |
2019年 | 14篇 |
2018年 | 21篇 |
2017年 | 19篇 |
2016年 | 22篇 |
2015年 | 12篇 |
2014年 | 22篇 |
2013年 | 19篇 |
2012年 | 29篇 |
2011年 | 28篇 |
2010年 | 19篇 |
2009年 | 19篇 |
2008年 | 18篇 |
2007年 | 28篇 |
2006年 | 21篇 |
2005年 | 17篇 |
2004年 | 16篇 |
2003年 | 10篇 |
2002年 | 14篇 |
2001年 | 13篇 |
2000年 | 13篇 |
1999年 | 7篇 |
1998年 | 8篇 |
1997年 | 9篇 |
1996年 | 22篇 |
1995年 | 10篇 |
1994年 | 15篇 |
1992年 | 11篇 |
1991年 | 14篇 |
1990年 | 6篇 |
1989年 | 7篇 |
1988年 | 17篇 |
1987年 | 11篇 |
1985年 | 7篇 |
1984年 | 12篇 |
1983年 | 7篇 |
1982年 | 10篇 |
1981年 | 12篇 |
1980年 | 11篇 |
1978年 | 9篇 |
1977年 | 10篇 |
1976年 | 14篇 |
1975年 | 10篇 |
1974年 | 16篇 |
1973年 | 9篇 |
1972年 | 10篇 |
1967年 | 4篇 |
1965年 | 4篇 |
排序方式: 共有749条查询结果,搜索用时 15 毫秒
11.
12.
I. N. Sorokin T. M. Golovina D. S. Rutman A. D. Popov V. M. Ust'yantsev V. A. Perepelitsyn T. É. Khairov N. V. Latypova N. I. Cherneta M. V. Galkin V. N. Kiselev A. E. Fadeev 《Refractories and Industrial Ceramics》1984,25(5-6):293-296
Conclusions The possibility of obtaining clinker from high-alumina cement by melting a mixture of lime and technical alumina in an electric-arc furnace at the Klyuchevsk Ferroalloy Plant has been shown.The high-alumina cement obtained from fused clinker is significantly better in its physicochemical properties than the cement produced on the basis of the lime-alumina slags from the ferroalloy industry.Translated from Ogneupory, No. 5, pp. 25–27, May, 1984. 相似文献
13.
V. M. Boiko V. P. Kiselev S. P. Kiselev A. N. Papyrin S. V. Poplavskii V. M. Fomin 《Combustion, Explosion, and Shock Waves》1996,32(2):191-203
The present paper is devoted to experimental and theoretical investigation of shock-wave propagation in a mixture of a gas and solid particles with clearly defined boundaries of the two-phase region (cloud of particles). The effect of qualitative transformation of supersonic flow behind a shock wave in a cloud of particles is shown experimentally and substantiated theoretically for volume concentrations of the dispersed phase of 0.1–3%.Translated from Fizika Goreniya i Vzryva, Vol. 32, No. 2, pp. 86–99, March–April, 1996. 相似文献
14.
Combustion, Explosion, and Shock Waves - Results of numerical simulations of fracture of titanium and aluminum nanocrystals by the molecular dynamics method are reported. The... 相似文献
15.
Fibre Chemistry - Results are given for a study and modelling of short-term creep of polypropylene and polyvinylidene fluoride threads designed for medical purposes. A physical analysis is given... 相似文献
16.
17.
Viacheslav P. Belavkin 《Quantum Information Processing》2013,12(3):1539-1626
Quantum mechanical systems exhibit an inherently probabilistic behavior upon measurement which excludes in principle the singular case of direct observability. The theory of quantum stochastic time continuous measurements and quantum filtering was earlier developed by the author on the basis of non-Markov conditionally-independent increment models for quantum noise and quantum nondemolition observability. Here this theory is generalized to the case of demolition indirect measurements of quantum unstable systems satisfying the microcausality principle. The exposition of the theory is given in the most general algebraic setting unifying quantum and classical theories as particular cases. The reduced quantum feedback-controlled dynamics is described equivalently by linear quasi-Markov and nonlinear conditionally-Markov stochastic master equations. Using this scheme for diffusive and counting measurements to describe the stochastic evolution of the open quantum system under the continuous indirect observation and working in parallel with classical indeterministic control theory, we derive the Bellman equations for optimal feedback control of the a posteriori stochastic quantum states conditioned upon these measurements. The resulting Bellman equation for the diffusive observation is then applied to the explicitly solvable quantum linear-quadratic-Gaussian problem which emphasizes many similarities with the corresponding classical control problem. 相似文献
18.
19.
20.
I. M. Abdulagatov S. B. Kiselev L. N. Levina Z. R. Zakaryaev O. N. Mamchenkova 《International Journal of Thermophysics》1996,17(2):423-440
The specific heat at constant volume, Cv, of propane, and mixture with a concentration ofx=0.0081 cool fraction of propane was measured along the critical isochores at temperatures between 290 and 400 K. The measurements were performed with a high-temperature constant-volume adiabatic calorimeter. The uncertainty of most of the measurements is estimated to be less than 1.5%. Measurements have been carried out in both the one- and two-phase regions. The results for the pure components are compared with earlier measurements. Crossover equations forC, obtained on the basis of the renormalization-group method and -expansion are applied to represent our experimental specific heat data for ethane, propane. and its mixture along the critical isochores. 相似文献