全文获取类型
收费全文 | 129篇 |
免费 | 1篇 |
专业分类
化学 | 20篇 |
力学 | 4篇 |
数学 | 41篇 |
物理学 | 65篇 |
出版年
2022年 | 6篇 |
2021年 | 6篇 |
2020年 | 2篇 |
2019年 | 3篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2016年 | 5篇 |
2015年 | 2篇 |
2014年 | 6篇 |
2013年 | 8篇 |
2012年 | 4篇 |
2011年 | 7篇 |
2010年 | 6篇 |
2009年 | 9篇 |
2008年 | 8篇 |
2007年 | 5篇 |
2006年 | 2篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2002年 | 3篇 |
2001年 | 2篇 |
1999年 | 4篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 3篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1970年 | 2篇 |
1969年 | 2篇 |
1968年 | 3篇 |
1967年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有130条查询结果,搜索用时 15 毫秒
1.
Differential inequalities for polynomials generalizing the well-known Smirnov, Rahman, Schmeisser, and Bernstein inequalities are obtained.
相似文献2.
3.
A new method for the synthesis of [Pt2(NH3)4P2O7] is proposed. Its transformations in a hydrochloric acid medium are described. 相似文献
4.
Kazbanov V. I. Starkov A. K. Kozhukhovskaya G. A. Kazbanova T. K. Trofimov V. I. Pavlenko N. I. 《Russian Journal of Coordination Chemistry》2001,27(1):65-69
A comparison study of the bis(-oxalato)tetramminediplatinum(II) dimer [Pt2(NH3)4(-C2O4)2] and the oxalatodiammineplatinum(II) chelate [Pt(NH3)2C2O4] is performed. The kinetics and mechanism of substitution of C2O2–
4 for Cl– in aqueous chloride solutions are studied by photoelectronic spectroscopy, gravimetry, and chemical phase analysis within the 1.0–6.7 pH range at 75°C. The rate constants of substitution and the equilibrium constants for a two-step protonation for the dimeric and chelate complexes are calculated. Their solubility in 1 M KCl at 75°C; is determined. The unit cell parameters for [Pt2(NH3)4(-C2O4)2] are determined: a = 3.858 Å, b = 10.704 Å, c = 6.795 Å, = 94.35°. The IR spectra of [Pt(NH3)2C2O4], [Pt2(NH3)4(-C2O4)2], and their deuterated analogs are studied. 相似文献
5.
A. S. Barabash V. Ya. Bradnova V. V. Dubinina N. P. Egorenkova S. I. Konovalov E. A. Pozharova N. G. Polukhina V. A. Smirnitskii N. I. Starkov Tan Nang So M. M. Chernyavskii T. V. Shchedrina V. I. Yumatov 《Bulletin of the Lebedev Physics Institute》2012,39(10):300-304
Ranges of monochromatic muons in nuclear photoemulsion, produced in the ?? ?? ??? ?? decay, are measured by the coordinate method to determine their energy by the range. The variance of the muon energymeasured by this method ?? ?? = (0.11±0.01) MeV, which corresponds to the accuracy of the determination of the charged particle energy by the range in nuclear emulsion ??3.1%. The developed technique will allow electron energy measurements in the 2??-decay (??3 MeV)with an accuracy of (5?C6)%. 相似文献
6.
A. K. Starkov G. A. Kozhukhovskaya N. I. Pavlenko 《Russian Journal of Coordination Chemistry》2014,40(9):695-696
A reaction of cis-diamminedichloroplatinum(II) with the natural polysaccharide arabinogalactan gave a product characterized by X-ray powder diffraction, IR spectroscopy, UV spectrophotometry, and thermogravimetry. It was demonstrated that cis-diamminedichloroplatinum(II) is bound to arabinogalactan by a linkage between its -C-O-C- bond and the hydrogen atom of the NH3 group of the starting complex. The product can suppress tumor growth with no toxic effect on the organism. 相似文献
7.
Luis N. Coria Konstantin E. Starkov 《Communications in Nonlinear Science & Numerical Simulation》2009,14(11):3879-3888
In this paper we characterize a locus of compact invariant sets of the system describing dynamics of the permanent-magnet synchronous motor (PMSM). We establish that all compact invariant sets of this system are contained in the intersection of one-parameter set of ellipsoids and compute its parameters. In addition, localizations by using a parabolic cylinder, an elliptic paraboloid and a hyperbolic cylinder are obtained. Simple polytopic bounds are derived with help of these localizations. Most of localizations mentioned above remain valid for more specific motor systems; namely, for the interior magnet PMSM and for the surface magnet PMSM. Yet another localization set for the interior magnet PMSM is described. Examples of localization of chaotic attractors existing for some values of parameters of PMSMs are presented as well. 相似文献
8.
9.
A. B. Aleksandrov A. V. Bagulya M. S. Vladimirov L. A. Goncharova A. I. Ivliev G. V. Kalinina L. L. Kashkarov N. S. Konovalova N. M. Okat’eva N. G. Polukhina A. S. Rusetskii N. I. Starkov V. A. Tsarev 《Bulletin of the Lebedev Physics Institute》2008,35(9):276-285
The search for and identification of energetic nuclei of superheavy elements of cosmic rays in olivine crystals frommeteorites, currently performedwithin the Olympia project [1], are based on measurements of dynamic and geometrical parameters of tracks, i.e., chemically etchable regions of the traces of slowing down of these nuclei before their stop, using the fully automated PAVIKOM measuring system [2]. 相似文献
10.
A. S. Starkov 《Journal of Mathematical Sciences》2002,108(5):851-858
The problem of the wave field of a source moving in an inhomogeneous medium is considered. It is assumed that the velocity of the source is less than the velocity of sound for t < 0 and is greater than this velocity for t > 0 (subsonicsupersonic transition). An asymptotic expansion for the wave field in a neighborhood of the source is constructed on the basis of the well-known Hadamard ansatz. The expansion derived is uniform with respect to the velocity of the source and contains new special functions. These functions are generalizations of the Hankel and Bessel functions and possess some remarkable properties. Bibliography: 7 titles. 相似文献