排序方式: 共有22条查询结果,搜索用时 15 毫秒
1.
D. O. Krivenkov D. A. Artemenkov V. Bradnova S. Vokál P. I. Zarubin I. G. Zarubina N. V. Kondratieva A. I. Malakhov A. A. Moiseenko G. I. Orlova N. G. Peresadko N. G. Polukhina P. A. Rukoyatkin V. V. Rusakova V. R. Sarkisyan R. Stanoeva M. Haiduc S. P. Kharlamov 《Physics of Atomic Nuclei》2010,73(12):2103-2109
Results on the coherent dissociation of relativistic 9C nuclei in a nuclear track emulsion are described. These results include the charge topology and kinematical features of final states. Events of 9C → 33He coherent dissociation are identified. 相似文献
2.
A. I. Klimov K. N. Kozlov E. A. Meleshko I. E. Ostashev V. A. Grigoriev V. A. Kaplin V. A. Loginov N. V. Kondratieva V. A. Veselovsky 《Physics of Atomic Nuclei》2009,72(2):286-292
The design and special features of the main units of high-speed electronics for the trigger subsystem of the T0 detector of the ALICE experiment are considered. Its characteristic time resolution is 50 ps. The dead time does not exceed 25 ns. 相似文献
3.
Öznur Yaşar Danny Dyer David A. Pike Margo Kondratieva 《Discrete Applied Mathematics》2009,157(8):1913-1923
In traditional edge searching one tries to clean all of the edges in a graph employing the least number of searchers. It is assumed that each edge of the graph initially has a weight equal to one. In this paper we modify the problem and introduce the Weighted Edge Searching Problem by considering graphs with arbitrary positive integer weights assigned to its edges. We give bounds on the weighted search number in terms of related graph parameters including pathwidth. We characterize the graphs for which two searchers are sufficient to clear all edges. We show that for every weighted graph the minimum number of searchers needed for a not-necessarily-monotonic weighted edge search strategy is enough for a monotonic weighted edge search strategy, where each edge is cleaned only once. This result proves the NP-completeness of the problem. 相似文献
4.
Oleg Golubitsky Marina Kondratieva Alexey Ovchinnikov Agnes Szanto 《Journal of Algebra》2009,322(11):3852
We give the first known bound for orders of differentiations in differential Nullstellensatz for both partial and ordinary algebraic differential equations. This problem was previously addressed in [A. Seidenberg, An elimination theory for differential algebra, Univ. of California Publ. in Math. III (2) (1956) 31–66] but no complete solution was given. Our result is a complement to the corresponding result in algebraic geometry, which gives a bound on degrees of polynomial coefficients in effective Nullstellensatz [G. Hermann, Die Frage der endlich vielen Schritte in der Theorie der Polynomideale, Math. Ann. 95 (1) (1926) 736–788; E.W. Mayr, A.W. Meyer, The complexity of the word problems for commutative semigroups and polynomial ideals, Adv. Math. 46 (3) (1982) 305–329; W.D. Brownawell, Bounds for the degrees in the Nullstellensatz, Ann. of Math. 126 (3) (1987) 577–591; J. Kollár, Sharp effective Nullstellensatz, J. Amer. Math. Soc. 1 (4) (1988) 963–975; L. Caniglia, A. Galligo, J. Heintz, Some new effectivity bounds in computational geometry, in: Applied Algebra, Algebraic Algorithms and Error-Correcting Codes, Rome, 1988, in: Lecture Notes in Comput. Sci., vol. 357, Springer, Berlin, 1989, pp. 131–151; N. Fitchas, A. Galligo, Nullstellensatz effectif et conjecture de Serre (théorème de Quillen–Suslin) pour le calcul formel, Math. Nachr. 149 (1990) 231–253; T. Krick, L.M. Pardo, M. Sombra, Sharp estimates for the arithmetic Nullstellensatz, Duke Math. J. 109 (3) (2001) 521–598; Z. Jelonek, On the effective Nullstellensatz, Invent. Math. 162 (1) (2005) 1–17; T. Dubé, A combinatorial proof of the effective Nullstellensatz, J. Symbolic Comput. 15 (3) (1993) 277–296].This paper is dedicated to the memory of Eugeny Pankratiev, who was the advisor of the first three authors at Moscow State University. 相似文献
5.
O. D. Golubitsky M. V. Kondratieva A. I. Ovchinnikov 《Journal of Mathematical Sciences》2009,163(5):515-522
The Ritt problem asks if there is an algorithm that decides whether one prime differential ideal is contained in another one
if both are given by their characteristic sets. We give several equivalent formulations of this problem. In particular, we
show that it is equivalent to testing whether a differential polynomial is a zero divisor modulo a radical differential ideal.
The technique used in the proof of this equivalence yields algorithms for computing a canonical decomposition of a radical
differential ideal into prime components and a canonical generating set of a radical differential ideal. Both proposed representations
of a radical differential ideal are independent of the given set of generators and can be made independent of the ranking. 相似文献
6.
K. Z. Mamatkulov R. R. Kattabekov S. S. Alikulov D. A. Artemenkov R. N. Bekmirzaev V. Bradnova P. I. Zarubin I. G. Zarubina N. V. Kondratieva N. K. Kornegrutsa D. O. Krivenkov A. I. Malakhov K. Olimov N. G. Peresadko N. G. Polukhina P. A. Rukoyatkin V. V. Rusakova R. Stanoeva S. P. Kharlamov 《Physics of Atomic Nuclei》2013,76(10):1224-1229
The charge topology in the fragmentation of 10C nuclei in a track nuclear emulsion at an energy of 1.2 GeV per nucleon is studied. In the coherent dissociation of 10C nuclei, about 82% of events are associated with the channel 10C → 2α+ 2p. The angular distributions and correlations of product fragments are presented for this channel. It is found that among 10C → 2α+ 2p events, about 30% are associated with the process in which dissociation through the ground state of the unstable 9Beg.s. nucleus is followed by 8Beg.s. + p decays. 相似文献
7.
A. P. Kondratieva N. Sh. Lebedeva Yu. A. Gubarev N. A. Pavlycheva V. P. Andreev G. A. Alper R. S. Kumeev 《Journal of Structural Chemistry》2009,50(4):722-726
The effects of photoirradiation on the conformation state of 4-(4′-dimethylaminostyryl)pyridine N-oxide was studied by spectral
(EAS, 1H NMR, IR) and thermochemical methods. Trans→cis isomerization was found to proceed in 4-(4′-dimethylaminostyryl)pyridine N-oxide irradiated with light (λ ≤ 400 nm) in chloroform.
The conversion of the trans form of 4-(4′-dimethylaminostyryl)pyridine N-oxide to the cis form depends on the time and intensity of irradiation. Maximum conversion was achieved when a photostationary mixture formed
with a ratio of components trans:cis = 40:60. Further irradiation of the solutions of 4-(4′-dimethylaminostyryl)pyridine N-oxide in chloroform led to salification
with HCl formed during the decomposition of CHCl3. 相似文献
8.
R. R. Kattabekov K. Z. Mamatkulov D. A. Artemenkov V. Bradnova S. Vokál D. M. Zhomurodov P. I. Zarubin I. G. Zarubina Z. A. Igamkulov N. V. Kondratieva N. K. Kornegrutsa D. O. Krivenkov A. I. Malakhov G. I. Orlova N. G. Peresadko N. G. Polukhina P. A. Rukoyatkin V. V. Rusakova R. Stanoeva M. Haiduc S. P. Kharlamov 《Physics of Atomic Nuclei》2010,73(12):2110-2115
A nuclear track emulsion was exposed to a mixed beam of relativistic 12N, 10C, and 7Be nuclei having a momentum of 2 GeV/c per nucleon. The beam was formed upon charge exchange processes involving 12C primary nuclei and their fragmentation. An analysis indicates that 10C nuclei are dominant in the beam and that 12N nuclei are present in it. The charge topology of relativistic fragments in the coherent dissociation of these nuclei is presented. 相似文献
9.
V. M. Avdyukhina U. A. Bliznyuk P. Y. Borschegovskaya A. V. Buslenko A. S. Ilyushin E. G. Kondratieva G. A. Krusanov I. S. Levin A. P. Sinitsyn F. R. Studenikin A. P. Chernyaev 《Moscow University Physics Bulletin》2018,73(3):334-338
This study investigates the effect of X-rays on potato tubers to stop their sprouting at different periods of storage. It has been found that there is a connection between the period of storage and the dose of irradiation. To control the quality of the irradiated tubers, the concentration of reducing sugars was measured during the entire experiment and compared to the parameters of non-irradiated potato tubers. 相似文献
10.
Maria L. Kondratieva Natalia P. Belskaia Alexandr V. Koksharov Koen Robeyns Wim Dehaen Vasiliy A. Bakulev 《Tetrahedron》2007,63(14):3042-3048
The systematic study of oxidative cyclization of 3-hydrazono-1,3-dihydroindole-2-thiones has been carried out and a series of new 2H-[1,2,3]thiadiazolo[5,4-b]indoles has been prepared. The elaborated reaction represents an efficient method for the synthesis of fused 1,2,3-thiadiazoles. 相似文献