排序方式: 共有21条查询结果,搜索用时 15 毫秒
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M. B. Gromov O. O. Ivashuk V. Y. Ionidi P. V. Karataev I. A. Kishin A. S. Kubankin A. N. Oleinik A. S. Chepurnov A. V. Shchagin 《Bulletin of the Lebedev Physics Institute》2016,43(11):319-322
A technique for measuring the spatial distribution of X-rays generated by a pyroelectric source is developed and tested. Anisotropy in the spatial distribution of X-rays from the surface perpendicular to the pyroelectric axis of the lithium niobate crystal depending on the piezoelectric crystal axis orientation was detected. The result obtained shows the necessity of considering the effect of piezoelectric properties of pyroelectric crystals on X-ray generation processes. 相似文献
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Belen Lpez Juan Rocha Kishin Sadarangani 《Mathematical Methods in the Applied Sciences》2019,42(1):49-58
In this paper, Lyapunov‐type inequalities are derived for a class of fractional boundary value problems with integral boundary conditions. As an application, we obtain a lower bound for the eigenvalues of corresponding equations. 相似文献
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It is shown that the ansatz for the asymptotic (r → ∞) gauge fields used by ’t Hooft in the study of monopoles in SO(3) electroweak theory is not unique. 相似文献
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We introduce Erdélyi‐Kober fractional quadratic integral equation with supremum, namely . This equation contains as special cases numerous integral equations studied by other authors. We show that there exists at least one monotonic solution belonging to C[0, 1] of our equation. The main tools in our analysis are Darbo fixed point theorem and the measure of noncompactness related to monotonicity which was introduced by Bana? and Olszowy. Finally, we present an example for illustrating the natural realizations of our abstract results. 相似文献
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Kishin Mariwalla 《Physics Reports》1975,20(5):287-362
The object of this review is to discuss methods that enable one to trace the origin of symmetries and conservation laws in mechanics to geometrical symmetries of space-time. Starting with the basic Newtonian assumptions on absolute space and time classical mechanics is developed in configuration space and phase space independently together with the related structures such as force-less mechanics. Heuristic considerations on geometric symmetries in configuration space reveal their intimate relation to conservation laws. Using the methods of differential geometry this relationship is put on a formal footing and symmetry groups of all spherically symmetric single term potentials are classified. The method of infinitesimal canonical transformations is presented as an alternative method of deducing dynamical symmetries of an arbitrary system in phase space. These methods also apply to non-relativistic quantum theory. Possible extension to special and general relatively is also discussed. 相似文献
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Dalkarov O. D. Negodaev M. A. Rusetskii A. S. Kirsanov M. A. Kubankin A. S. Kishin I. A. Klenin A. A. Nazhmudinov R. M. 《Physics of Atomic Nuclei》2021,84(2):109-114
Physics of Atomic Nuclei - The possibility of neutron generation by irradiating deuterated crystalline structures with an electron beam with an energy of 20–40 keV was studied. As targets,... 相似文献
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In this note, we present an affirmative answer to a question presented in the paper “Some inequalities in inner product spaces related to the generalized triangle inequality” by S.S. Dragomir et al. [Appl. Math. Comput. 217 (18) (2011) 7462-7468]. 相似文献
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V. I. Alexeyev V. A. Astapenko A. N. Eliseyev E. F. Irribarra V. A. Karpov I. A. Kishin Yu. A. Krotov A. S. Kubankin R. M. Nazhmudinov M. Al-Omari S. V. Sakhno 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2017,11(4):694-698
The Röntgen-1 setup which is intended for use in investigating the spectral-angular characteristics of X-rays generated due to the interaction between a 7-MeV electron beam and substances, including different shaped surfaces, is described. The setup is distinguished by a low radiation background, enabling the determination of low-intensity radiation spectra. The results of measuring the characteristics of the polarized bremsstrahlung of relativistic electrons from media with different atomic structures are presented. 相似文献