全文获取类型
收费全文 | 66篇 |
免费 | 0篇 |
专业分类
化学 | 23篇 |
晶体学 | 1篇 |
数学 | 23篇 |
物理学 | 19篇 |
出版年
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 3篇 |
2014年 | 1篇 |
2013年 | 5篇 |
2012年 | 2篇 |
2011年 | 1篇 |
2010年 | 5篇 |
2009年 | 1篇 |
2008年 | 1篇 |
2007年 | 4篇 |
2006年 | 5篇 |
2005年 | 6篇 |
2003年 | 2篇 |
2002年 | 3篇 |
1999年 | 2篇 |
1998年 | 4篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1981年 | 1篇 |
1979年 | 2篇 |
1977年 | 1篇 |
排序方式: 共有66条查询结果,搜索用时 15 毫秒
31.
Ishmetova R. I. Babkov D. A. Kucheryavenko A. F. Babkova V. A. Sirotenko V. S. Ignatenko N. K. Tolschina S. G. Vassiliev P. M. Rusinov G. L. Spasov A. A. 《Russian Chemical Bulletin》2020,69(4):768-773
Russian Chemical Bulletin - According to the in silico consensus activity prediction, a series of 3,6-disubstituted 1,2,4,5-tetrazines were synthesized as promising inhibitors of the Maillard... 相似文献
32.
A. N. Kozlov S. A. Zibrov A. A. Zibrov V. I. Yudin A. V. Taichenachev V. P. Yakovlev E. A. Tsygankov A. S. Zibrov V. V. Vassiliev V. L. Velichansky 《Journal of Experimental and Theoretical Physics》2016,122(5):823-831
Magnetic resonance at the Fg = 1 \( \rightleftarrows \)Fe = 1 transition of the D1 line in 87Rb has been studied with pumping and detection by linearly polarized radiation and detection at the double frequency of the radiofrequency field. The intervals of allowed values of the static and alternating magnetic fields in which magnetic resonance has a single maximum have been found. The structure appearing beyond these intervals has been explained. It has been shown that the quadratic Zeeman shift is responsible for the three-peak structure of resonance; the radiofrequency shift results in the appearance of additional extrema in resonance, which can be used to determine the relaxation constant Γ2. The possibility of application in magnetometry has been discussed. 相似文献
33.
We study the three-dimensional elasticity operator in a semi-infinite circular cylinder subject to free boundary conditions, in the case of zero Poisson ratio. We prove, adapting the method from [15], i.e., by first finding an invariant subspace for the elasticity operator such that the essential spectrum has a strictly positive lower bound and then finding a test function in this space for which the variational quotient takes a value below the bottom of the essential spectrum, that there is an eigenvalue embedded in the continuous spectrum. Physically, an eigenvalue corresponds to a "trapped mode", that is, a harmonic oscillation localized near the edge. This effect, known in mechanics as the "edge resonance" has been extensively studied numerically and experimentally. Our paper extends the mathematical justification of such phenomena provided by [15] to a three-dimensional setting 相似文献
34.
A. Nossov J. Pierre J. Beille V. Vassiliev B. Slobodin 《The European Physical Journal B - Condensed Matter and Complex Systems》1998,6(4):467-472
The influence of hydrostatic pressure on the transport properties of (La1-xRx)0.67Ca0.33MnO3 (,Tb) ferromagnetic manganites is investigated. The enhancement of the Curie temperature TC under pressure agrees with previous data. In the paramagnetic range, the resistivity can be represented by a Mott localisation
law, with a characteristic temperature T0 decreasing with pressure. The variation of TC with pressure is compared to the effect induced by replacing La by a magnetic rare earth in (La1-xRx)0.67Sr0.33MnO3 manganites (, ..., Tm). The main effect is not related to the decrease of the mean radius of the cation, but to an additional scattering
by the magnetic moment of the rare earth.
Received: 15 May 1998 / Revised: 6 July 1998 / Accepted: 16 July 1998 相似文献
35.
G Fuchs K-H Müller J Freudenberger K Nenkov S-L Drechsler SV Shulga D Lipp A Gladun T Cichorek P Gegenwart 《Pramana》2002,58(5-6):791-797
The effect of substitutional disorder on the superconducting properties of YNi2B2C was studied by partially replacing yttrium and nickel by Lu and Pt, respectively. For the two series of (Y, Lu)Ni2B2C and Y(Ni, Pt)2B2C compounds, the upper critical field H
c2(T) and the specific heat c
p(T, H) in the superconducting mixed state have been investigated. Disorder is found to reduce several relevant quantities such
as T
c, the upper critical field H
c2(0) at T=0 and a characteristic positive curvature of H
c2(T) observed for these compounds near T
c. The H
c2(T) data point to the clean limit for (Y, Lu) substitutions and to a transition to the quasi-dirty limit for (Ni, Pt) substitutions.
The electronic specific heat contribution γ(H) exhibits significant deviations from the usual linear γ(H) law. These deviations reduce with growing substitutional disorder but remain even in the quasidirty limit which is reached
in the Y(Ni1−x
, Pt
x
)2B2C samples for x=0.1. 相似文献
36.
37.
V. A. Vassiliev 《Mathematical Notes》1996,60(5):503-509
The topological complexity of an algorithm is the number of its branchings. In the paper we prove that the minimal topological complexity of an algorithm that approximately computes a root of a real polynomial of degreed equalsd/2 for evend, is greater than or equal to 1 for oddd>–3, and equals 1 ford=3 or 5.Translated fromMatematicheskie Zametki, Vol. 60, No. 5, pp. 670–680, November, 1996.This research was supported by the Russian Foundation for Basic Research under grant No. 95-01-00846a and by the INTAS under grant No. 4373. 相似文献
38.
Yu.B. Vassiliev V.S. Bagotzky V.A. Gromyko 《Journal of Electroanalytical Chemistry》1984,178(2):247-269
Oxidation and reduction of platinum electrodes have been investigated in the potential range up to 3.0 V in acid, alkaline and phosphate buffer solutions with pH from 0 to 14. It is shown that oxygen adsorption and absorption on platinum are usually superimposed, but they may be artificially separated using a strong dependence of the second process upon platinum pretreatment and potential sweep rate. The dependence of oxygen surface coverage on potential has several characteristic regions, each corresponding to the formation of a definite surface oxycompound. 相似文献
39.
V.V. Vassiliev S.M. Il’ina V.L. Velichansky 《Applied physics. B, Lasers and optics》2003,76(5):521-523
A miniature high-coherent diode laser was developed. Optical feedback from a high-Q microsphere resonator was used to narrow
the spectrum of the laser, and a nearly half-pitch gradient-index lens served as a coupling element. As estimated from the
variation in frequency-tuning range (chirp-reduction factor) the fast line width of the laser was reduced by more than three
orders. It is remarkable that the system reveals stable single-mode operation at a relatively high feedback level. A tentative
explanation is presented in terms of previously given models.
Received: 8 July 2002 / Revised version: 9 March 2003 / Published online: 24 April 2003
RID="*"
ID="*"Corresponding author. Fax: +7-095/334-0249, E-mail: vvv@okb.lpi.troitsk.ru 相似文献
40.
Veronika K. Laurinavichyute Sergey Yu. Vassiliev Alexander Yu. Filatov Eduard E. Levin Galina A. Tsirlina 《Journal of Solid State Electrochemistry》2012,16(11):3515-3528
Cathodic electrodeposition of oxides on platinum from MoO3–K2MoO4 (3.85–75?mol% MoO3) under DC and pulsed galvanostatic modes is discussed in combination with voltammetry data. Characteristic potential values (as related to oxygen evolution onset) are reported for Mo(VI/IV) redox processes, as well as for electrochemical equilibria with participation of molybdenum metal and Pt–Mo alloys. On the basis of scan rate effects and results for various potential limits, and also of voltammetry with preliminary potentiostatic accumulation of products, molybdate reduction mechanism complicated by a chemical step of Mo metal oxidation is proposed. This qualitative assumption is verified in preparative electrolysis experiments with products identification by means of X-ray diffractometry, scanning electron microscopy, and EDX local analysis. Deposition under pulsed mode is found to be useful tool to adjust the duration of chemical step and by these means to alter the composition of final products. The conditions supporting the formation of MoO2 and more reduced oxides are formulated. 相似文献