全文获取类型
收费全文 | 67篇 |
免费 | 1篇 |
专业分类
化学 | 23篇 |
力学 | 2篇 |
数学 | 3篇 |
物理学 | 40篇 |
出版年
2023年 | 1篇 |
2019年 | 2篇 |
2016年 | 1篇 |
2014年 | 2篇 |
2012年 | 2篇 |
2011年 | 2篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 1篇 |
2007年 | 3篇 |
2006年 | 2篇 |
2005年 | 4篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2000年 | 8篇 |
1999年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 5篇 |
1991年 | 1篇 |
1989年 | 1篇 |
1988年 | 4篇 |
1986年 | 2篇 |
1984年 | 3篇 |
1980年 | 1篇 |
排序方式: 共有68条查询结果,搜索用时 15 毫秒
41.
P. André J. Aubreton S. Clain M. Dudeck E. Duffour M. F. Elchinger B. Izrar D. Rochette R. Touzani D. Vacher 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2010,57(2):227-234
This work is a contribution to the calculation of transport coefficients for
nitrogen, hydrogen, Mars and Titan atmospheres plasmas. The calculation
which assumes local thermodynamic equilibrium is performed using
Lennard-Jones potential and simple combining rules for the potential
parameters for neutral-neutral interaction. A discussion is made for the
other interactions: neutral-charged, charged-charged and electron-neutral.
The results are compared with those of published theoretical studies for a
temperature up to 30 000 K. 相似文献
42.
Three sharp absorption features in the energy range 2.36–2.55 eV have been detected in the transmission spectrum of Co-diffused ZnSe, and a number of luminescence transitions originating from the lowest of these states at 2.361 eV have been observed. Photoluminescence excitation spectra prove that these are high energy excited states of the Co2+Zn impurity, a conclusion confirmed by comparison of measured and predicted luminescence energies. This represents the first identification of luminescence branching from a higher excited state of a transition metal ion in any semiconductor. The sharp, weakly phonon-coupled transitions involve either intra-impurity excitation or transitions from the impurity to localised states split off from a minimum in the conduction band. The implications of these observations for the mechanism of host-impurity energy transfer and for the nature of the excited state wavefunctions are discussed. 相似文献
43.
Zhou SZ Sey M De Clercq PJ Milanesio M Viterbo D 《Angewandte Chemie (International ed. in English)》2000,39(16):2861-2863
44.
V. I. Trukhin N. S. Bezaeva P. Rochette J. Gattacceca 《Moscow University Physics Bulletin》2007,62(3):201-202
The effect of hydrostatic pressure (up to 1.3 GPa) on the isothermal remanent magnetization of rocks is studied experimentally using a new-type nonmagnetic high-pressure cell produced at the Institute of High-Pressure Physics (Troitsk, Moscow oblast). The experiments were carried out at the European Center for Research and Education in Environmental Geoscience (CEREGE), France. 相似文献
45.
46.
47.
Calderbank AR; Cameron PJ; Kantor WM; Seidel JJ 《Proceedings London Mathematical Society》1997,75(2):436-480
When m is odd, spreads in an orthogonal vector space of type+(2m + 2,2) are related to binary Kerdock codes and extremalline-sets in 2m + 1 with prescribed angles. Spreads in a 2m-dimensionalbinary symplectic vector space are related to Kerdock codesover Z4 and extremal line-sets in with prescribed angles. These connections involve binary, realand complex geometry associated with extraspecial 2-groups.A geometric map from symplectic to orthogonal spreads is shownto induce the Gray map from a corresponding Z4-Kerdock codeto its binary image. These geometric considerations lead tothe construction, for any odd composite m, of large numbersof Z4-Kerdock codes. They also produce new Z4-linear Kerdockand Preparata codes. 1991 Mathematics Subject Classification:primary 94B60; secondary 51M15, 20C99. 相似文献
48.
49.
De Muynck H Madder A Farcy N De Clercq PJ Pérez-Payán MN Öhberg LM Davis AP 《Angewandte Chemie (International ed. in English)》2000,39(1):145-148
Recursive deconvolution of a 729-membered peptide library has identified three active sequences, in which both Ser and His are present in one of the two tripeptidic chains generated on a steroidal scaffold (see structural formula), for the cleavage of an activated p-nitrophenyl ester. This combinatorial approach aims at searching for serine-protease-like activity. 相似文献
50.
Sonication has been widely used in the dispersal of carbon nanotubes (CNTs) in various liquids as well as in their functionalization in aqueous acids. Here, for the first time, we study the sonication of multiwalled CNTs (MWCNTs) in deionized water. Our results indicate an improvement in the aqueous dispersal of MWCNTs as well as an increase in their adhesive interaction with Au substrates. Field emission scanning electron and high-resolution transmission electron microscopies as well as X-ray photoelectron, photoacoustic Fourier transform IR, and Raman spectroscopies have shown this to be due to the production of low concentrations of O-containing functionalizations (alcohol, carbonyl, acid, with the total O concentration being approximately 2%), without damaging the basic CNT structure; this production of functional groups is mirrored by the disappearance of -CH(n) groups existing on the pristine CNTs. These new functional groups are capable of hydrogen bonding, which plays an important role in their aqueous dispersal and enhanced substrate interactions. 相似文献