全文获取类型
收费全文 | 136篇 |
免费 | 1篇 |
专业分类
化学 | 64篇 |
晶体学 | 2篇 |
力学 | 2篇 |
数学 | 2篇 |
物理学 | 67篇 |
出版年
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 1篇 |
2016年 | 12篇 |
2015年 | 1篇 |
2014年 | 7篇 |
2013年 | 6篇 |
2012年 | 6篇 |
2011年 | 8篇 |
2010年 | 11篇 |
2009年 | 7篇 |
2008年 | 8篇 |
2007年 | 9篇 |
2006年 | 8篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 5篇 |
2002年 | 8篇 |
2001年 | 5篇 |
1999年 | 3篇 |
1998年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1973年 | 1篇 |
1968年 | 2篇 |
1960年 | 1篇 |
排序方式: 共有137条查询结果,搜索用时 375 毫秒
1.
Physics of Atomic Nuclei - A model of a neural-network-like quantum-mechanical system is considered. The role of neurons is played by quantum-mechanical particles which evolve under the action of... 相似文献
2.
3.
S. V. Troshenkova E. S. Sashina N. P. Novoselov K. -F. Arndt 《Russian Journal of General Chemistry》2010,80(3):501-506
Diluted solutions of cellulose and hydroxypropylcellulose in 1-ethyl-3-methylimidazolium acetate were studied by the method
of static light scattering. Mean molecular masses and the size of the particles of the studied polymers in solution, as well
as the values of the second virial coefficient are reported. 相似文献
4.
A. S. Novoselov A. M. Rodin S. Motycak A. V. Podshibyakin L. Krupa A. V. Belozerov V. Yu. Vedeneyev A. V. Gulyaev A. V. Gulyaeva J. Kliman V. S. Salamatin S. V. Stepantsov E. V. Chernysheva S. A. Yukhimchuk A. B. Komarov D. Kamas 《Physics of Particles and Nuclei Letters》2016,13(5):595-597
The results of the development and the general information about the data acquisition system which was recently created at the MASHA setup (Flerov laboratory of nuclear reactions at Joint institute for nuclear research) are presented. The main difference from the previous system is that we use a new modern platform, National Instruments PXI with XIA multichannel high-speed digitizers (250 MHz 12 bit 16 channels). At this moment system has 448 spectrometric channels. The software and its features for the data acquisition and analysis are also described. The new DAQ system expands precision measuring capabilities of alpha decays and spontaneous fission at the focal plane position-sensitive silicon strip detector which, in turn, increases the capabilities of the setup in such a field as low-yield registration of elements. 相似文献
5.
Cristian E. Lacey Alex G. Novoselov Michael E. Mueller 《Proceedings of the Combustion Institute》2021,38(2):2673-2680
Reduced-order manifold approaches to turbulent combustion modeling traditionally involve precomputation of manifold solutions and pretabulation of the thermochemical database versus a small number of manifold variables. However, additional manifold variables are required as the complexity of turbulent combustion processes increases through consideration of, for example, multi-modal, non-adiabatic, or non-isobaric combustion, or combustion featuring multiple and/or inhomogeneous inlets. This increase in the number of manifold variables comes with an increase in the computational cost of precomputing a greater number of manifold solutions, most of which are never actually utilized in a CFD calculation. The memory required to store the pretabulated high-dimensional thermochemical database also increases, practically limiting the complexity of manifold-based combustion models. In this work, a new In-Situ Adaptive Manifolds (ISAM) approach is developed that overcomes this limitation by combining ‘on-the-fly’ calculation of manifold solutions with In-Situ Adaptive Tabulation (ISAT), enabling the use of more complex manifold-based turbulent combustion models. The performance of ISAM is evaluated via LES of turbulent nonpremixed jet flames with both hydrogen and hydrocarbon fuels. A performance assessment indicates that the computational overhead associated with ISAM compared to pretabulation ranges from negligible up to a factor of two, with most of this overhead associated with convolution of the thermochemical state against a presumed subfilter PDF. In addition, the memory requirements of ISAM are more than two orders of magnitude less than conventional tabulation. These results demonstrate the potential for ISAM to accommodate significantly more complex manifold-based combustion models. 相似文献
6.
7.
The aim of this brief report is to study the behaviour of sheath structure in a multi-component plasma with dust-neutral collisions.
The plasma consists of electrons, ions, micron size negatively charged dust particles and neutrals. The sheath-edge potential
and sheath width are calculated for collisionally dominated sheath. Comparison of collisionless and collisionally dominated
sheath are made. 相似文献
8.
N. P. Novoselov E. S. Sashina A. P. Kuznetsova V. E. Petrenko 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2007,81(10):1706-1708
The literature data and our quantum-chemical electron density distribution calculations were compared with experiment for the N-methylmorpholine-N-oxide molecule 相似文献
9.
Solutions of fibroin-poly-3-hydroxybutyrate polymer blends in hexafluoro-2-propanol and films obtained after removal of the solvent are experimentally studied at various polymer ratios.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 1, 2005, pp. 155–160.Original Russian Text Copyright © 2005 by Sashina, Novoselov, Heinemann. 相似文献
10.
We discuss the notion of spin squeezing considering two mutually exclusive classes of spin-s states, namely, oriented and non-oriented states. Our analysis shows that the oriented states are not squeezed while non-oriented
states exhibit squeezing. We also present a new scheme for construction of spin-s states using 2s spinors oriented along different axes. Taking the case of s=1, we show that the ‘non-oriented’ nature and hence squeezing arise from the intrinsic quantum correlations that exist among
the spinors in the coupled state. 相似文献