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排序方式: 共有132条查询结果,搜索用时 15 毫秒
1.
Umarova N. N. Movchan N. I. Yusupov R. A. Korolev E. A. Morozov V. P. 《Russian Journal of General Chemistry》2003,73(7):999-1004
Ion exchange of silver(I) on thin polycrystalline PbS films in 10-
5-10-
2 M aqueous solutions of AgNO3 at 20-60°C was studied by X-ray fluorescence, atomic-absorption, and X-ray diffraction methods and by transmission electron microscopy. Since, under the given experimental conditions, diffusion of Ag(I) ions in a solid is the limiting stage of the process, the experimental kinetic dependences can be adequately described by the Fick equation for both semi-infinite medium and restricted plane at steady source of a diffusant on the surface. 相似文献
2.
Electroreduction of methacryloylacetone and its FeIII and CuII complexes was studied by cyclic voltammetry and preparative electrolysis on a Hg electrode. The possibility of the electropolymerization of the compounds at highly negative potentials (–2.0 V, vs sce) has been demonstrated. The polymers obtained were characterized by elemental analysis, electronic, IR-, and Mössbauer spectroscopy.For part 36, see Ref. 1.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 255–261, February, 1994. 相似文献
3.
Olga N. Kataeva Aidar T. Gubaidullin Igor A. Litvinov Olga A. Lodochnikova Lenar R. Islamov Alexander I. Movchan Galina A. Chmutova 《Journal of Molecular Structure》2002,610(1-3):175-179
Crystal and molecular structure of 1-phenyl-3-benzoylamino-4-benzoylpyrazol-2-in-5-one as a product of the benzoylation of 1-phenyl-3-benzoylaminopyrazol-2-in-5-one was characterised by X-ray single crystal diffraction. It is shown that 1-phenyl-3-benzoylamino-4-benzoylpyrazol-2-in-5-one exists in the solid phase in an NH-tautomeric form, which is stabilised by two intramolecular hydrogen bonds and one intermolecular bond with the solvate dioxane molecule, the latter being used as a solvent for recrystallisation. 相似文献
4.
The propagation of a semi-infinite line defect, contained in an infinite square-cell lattice is considered. The defect is composed of particles lighter than those in the ambient lattice and it is assumed this defect propagates with constant speed. Dispersion properties of the lattice are related to waves generated by the propagating defect. In order to determine these properties, the Wiener–Hopf technique is applied. Additional features, related to localisation along the defect are also identified. Analysis of the dispersion relations for this lattice, from the kernel function inside the Wiener–Hopf equation, is carried out. The solution of the Wiener–Hopf equation is presented for the case when an external load is applied corresponding to an energy flux at infinity. 相似文献
5.
Colloid Journal - Protomicelles represent a new concept of colloid science relevant to micelle-like aggregates of surfactants in solutions. In contrast to ordinary micelles, their formation... 相似文献
6.
The paper addresses the problem of a semi-infinite plane crack along the interface between two isotropic half-spaces. Two methods of solution have been considered in the past: Lazarus and Leblond [1998a. Three-dimensional crack-face weight functions for the semi-infinite interface crack-I: variation of the stress intensity factors due to some small perturbation of the crack front. J. Mech. Phys. Solids 46, 489-511, 1998b. Three-dimensional crack-face weight functions for the semi-infinite interface crack-II: integrodifferential equations on the weight functions and resolution J. Mech. Phys. Solids 46, 513-536] applied the “special” method by Bueckner [1987. Weight functions and fundamental fields for the penny-shaped and the half-plane crack in three space. Int. J. Solids Struct. 23, 57-93] and found the expression of the variation of the stress intensity factors for a wavy crack without solving the complete elasticity problem; their solution is expressed in terms of the physical variables, and it involves five constants whose analytical representation was unknown; on the other hand, the “general” solution to the problem has been recently addressed by Bercial-Velez et al. [2005. High-order asymptotics and perturbation problems for 3D interfacial cracks. J. Mech. Phys. Solids 53, 1128-1162], using a Wiener-Hopf analysis and singular asymptotics near the crack front.The main goal of the present paper is to complete the solution to the problem by providing the connection between the two methods. This is done by constructing an integral representation for Lazarus-Leblond's weight functions and by deriving the closed form representations of Lazarus-Leblond's constants. 相似文献
7.
M. Brun S. Guenneau A.B. Movchan D. Bigoni 《Journal of the mechanics and physics of solids》2010,58(9):1212-1224
Dynamics of thick interfaces separating different regions of elastic materials is investigated. The interfaces are made up of elastic layers or inertial truss structures. The study of evanescent mode propagation and transmission properties reveals that the discrete nature of structural interfaces introduces unusual filtering characteristics in the system, which cannot be obtained with multilayered interfaces. An example of metamaterial is presented, namely, a planar structural interface, which acts as a flat lens, therefore evidencing the negative refraction and focussing of elastic waves. 相似文献
8.
We analyze a crack propagating in an inhomogeneous rectangular lattice in the state of anti-plane shear. The filtering properties of such a lattice are linked to the energy dissipation due to waves initiated by the crack. The influence of the inhomogeneities within the lattice on the lattice trapping is investigated. 相似文献
9.
I. A. Golutvin N. V. Gorbunov V. Yu. Karjavin V. S. Khabarov P. V. Moissenz S. A. Movchan V. V. Perelygin S. V. Sergeev D. A. Smolin A. V. Zarubin 《Physics of Particles and Nuclei Letters》2007,4(3):253-257
The influence of the high background rates on the Cathode Strip Chamber (CSC) anode trigger ability has been studied. The
investigation has been made with a P3 prototype of the CSC of ME1/1 Endcap muon station of the CMS experiment (CERN). The
work has been done at the Gamma Irradiation Facility (GIF, CERN). P3 has been installed at the SPS X5c muon beam line in a
background field of 137Cs source. The CSC timing resolution and the track registration efficiency as a function of gamma rate are presented.
The text was submitted by the authors in English. 相似文献
10.
N. I. Azorskii Yu. V. Gusakov V. V. Elsha T. L. Enik Yu. V. Ershov V. D. Kekelidze E. M. Kislov A. O. Kolesnikov D. T. Madigozhin S. A. Movchan I. A. Polenkevich Yu. K. Potrebenikov V. A. Samsonov S. N. Shkarovskiy A. N. Sotnikov A. D. Volkov A. I. Zinchenko 《Physics of Particles and Nuclei Letters》2017,14(1):144-149
A device for fabricating thin-wall (straw) drift tubes using polyethylene terephthalate film 36 μm thick by ultrasonic welding is described together with the technique for controlling their quality. The joint width amounts to 0.4–1.0 mm. The joint breaking strength is 31.9 kg/mm2. The argon leakage from a tube of volume 188.6 cm3 under a pressure gradient of 1.0 atm does not exceed 0.3 × 10–3 cm3/min, which is mainly related to the absence of metallization in the joint vicinity. The high strength, the low tensile creep due to the absence of glued layers, the small value of gas leakage makes the new tubes capable of reliable and long-term operation in vacuum, which is confirmed by the operation of 7168 straw tubes for two years in the NA62 experiment. 相似文献