全文获取类型
收费全文 | 866篇 |
免费 | 2篇 |
专业分类
电工技术 | 11篇 |
化学工业 | 104篇 |
金属工艺 | 43篇 |
机械仪表 | 52篇 |
建筑科学 | 18篇 |
矿业工程 | 6篇 |
能源动力 | 4篇 |
轻工业 | 16篇 |
水利工程 | 14篇 |
石油天然气 | 36篇 |
无线电 | 47篇 |
一般工业技术 | 273篇 |
冶金工业 | 136篇 |
原子能技术 | 61篇 |
自动化技术 | 47篇 |
出版年
2021年 | 15篇 |
2019年 | 16篇 |
2018年 | 24篇 |
2017年 | 26篇 |
2016年 | 14篇 |
2015年 | 9篇 |
2014年 | 24篇 |
2013年 | 31篇 |
2012年 | 23篇 |
2011年 | 26篇 |
2010年 | 19篇 |
2009年 | 23篇 |
2008年 | 19篇 |
2007年 | 19篇 |
2006年 | 18篇 |
2004年 | 13篇 |
2003年 | 12篇 |
2002年 | 9篇 |
2000年 | 12篇 |
1999年 | 19篇 |
1998年 | 13篇 |
1997年 | 15篇 |
1995年 | 12篇 |
1994年 | 11篇 |
1993年 | 8篇 |
1992年 | 10篇 |
1990年 | 16篇 |
1989年 | 11篇 |
1988年 | 11篇 |
1986年 | 12篇 |
1985年 | 9篇 |
1984年 | 18篇 |
1983年 | 8篇 |
1982年 | 10篇 |
1981年 | 26篇 |
1980年 | 19篇 |
1979年 | 20篇 |
1978年 | 14篇 |
1977年 | 16篇 |
1976年 | 20篇 |
1975年 | 16篇 |
1974年 | 16篇 |
1973年 | 21篇 |
1972年 | 14篇 |
1971年 | 19篇 |
1970年 | 12篇 |
1969年 | 15篇 |
1968年 | 10篇 |
1967年 | 10篇 |
1965年 | 12篇 |
排序方式: 共有868条查询结果,搜索用时 15 毫秒
11.
G. I. Sergeev V. M. Bludilin A. V. Lobastova D. I. Dem'yanovskaya V. I. Voevoda 《Chemistry and Technology of Fuels and Oils》1989,25(3):159-161
Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 3, pp. 21–22, March, 1989. 相似文献
12.
A. P. Osipov M. G. Semena Yu. Yu. Sergeev 《Journal of Engineering Physics and Thermophysics》1988,54(5):539-542
We develop a theoretical model of the development of a temperature jump across the boundary between phases during a phase transition in pure liquids.Notation G1
mass flux of molecules of the liquid into the liquid
- G2
mass flux of molecules of the liquid into the vapor
- Gv
mass flux of vapor molecules
- T1
vapor temperature near the liquid surface
- T2
temperature of the liquid
- Tv
vapor temperature
- R
universal gas constant
- cp, cv
specific heats
- r
heat of vaporization
- q
heat flux density
- K
ratio cp/cv
-
parameter of the phase transition
- F0
area of the interface
- P1
pressure of the liquid
- P2
phase transition pressure
- Pv
vapor pressure
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 54, No. 5, pp. 793–797, May, 1988. 相似文献
13.
G. L. Litvinov A. Ya. Rodionov S. N. Sergeev A. N. Sobolevski 《Soft Computing - A Fusion of Foundations, Methodologies and Applications》2013,17(10):1767-1785
This paper is a survey on universal algorithms for solving the matrix Bellman equations over semirings and especially tropical and idempotent semirings. However, original algorithms are also presented. Some applications and software implementations are discussed. 相似文献
14.
Kseniia A. Sergeeva Dmitrii V. Pavlov Albert A. Seredin Eugeny V. Mitsai Aleksandr A. Sergeev Evgeny B. Modin Anastasiia V. Sokolova Tsz Chun Lau Kseniia V. Baryshnikova Mihail I. Petrov Stephen V. Kershaw Aleksandr A. Kuchmizhak Kam Sing Wong Andrey L. Rogach 《Advanced functional materials》2023,33(44):2307660
In order to advance the development of quantum emitter-based devices, it is essential to enhance light-matter interactions through coupling between semiconductor quantum dots with high quality factor resonators. Here, efficient tuning of the emission properties of HgTe quantum dots in the infrared spectral region is demonstrated by coupling them to a plasmonic metasurface that supports bound states in the continuum. The plasmonic metasurface, composed of an array of gold nanobumps, is fabricated using single-step direct laser printing, opening up new opportunities for creating exclusive 3D plasmonic nanostructures and advanced photonic devices in the infrared region. A 12-fold enhancement of the photoluminescence in the 900–1700 nm range is observed under optimal coupling conditions. By tuning the geometry of the plasmonic arrays, controllable shaping of the emission spectra is achieved, selectively enhancing specific wavelength ranges across the emission spectrum. The observed enhancement and shaping of the emission are attributed to the Purcell effect, as corroborated by systematic measurements of radiative lifetimes and optical simulations based on the numerical solution of Maxwell's equations. Moreover, coupling of the HgTe photoluminescence to high quality factor modes of the metasurface improves emission directivity, concentrating output within an ≈20° angle. 相似文献
15.
V. L. Sergeev A. S. Strogii V. A. Tsurko 《Journal of Engineering Physics and Thermophysics》1982,42(1):25-30
Results are presented from a numerical analysis and experimental study of the enthalpy and velocity distributions along and across a subsonic plasma air jet.Notation x, r
axial and radial coordinates
- u, v
axial and radial components of velocity
-
density
-
viscosity
-
emissivity
- r0.5
radius at which local value of velocity or enthalpy is half its axial value
- ,
radii of dynamic and thermal boundary layers
- q
heat flux, kW/m2
- h, hw
stagnation enthalpy and enthalpy at wall temperature, kJ/kg
- p, p
stagnation pressure and static pressure, Pa
- R
radius of curvature of spherical front part of body
Indices 0
teconditions at nozzle edge
- m
conditions on jet axis
-
conditions on outer boundary of jet
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 42, No. 1, pp. 34–39, January, 1982. 相似文献
16.
17.
18.
19.
20.