218 research outputs found
Frequency locking of modulated waves
We consider the behavior of a modulated wave solution to an
-equivariant autonomous system of differential equations under an
external forcing of modulated wave type. The modulation frequency of the
forcing is assumed to be close to the modulation frequency of the modulated
wave solution, while the wave frequency of the forcing is supposed to be far
from that of the modulated wave solution. We describe the domain in the
three-dimensional control parameter space (of frequencies and amplitude of the
forcing) where stable locking of the modulation frequencies of the forcing and
the modulated wave solution occurs.
Our system is a simplest case scenario for the behavior of self-pulsating
lasers under the influence of external periodically modulated optical signals
On C*-algebras generated by pairs of q-commuting isometries
We consider the C*-algebras O_2^q and A_2^q generated, respectively, by
isometries s_1, s_2 satisfying the relation s_1^* s_2 = q s_2 s_1^* with |q| <
1 (the deformed Cuntz relation), and by isometries s_1, s_2 satisfying the
relation s_2 s_1 = q s_1 s_2 with |q| = 1. We show that O_2^q is isomorphic to
the Cuntz-Toeplitz C*-algebra O_2^0 for any |q| < 1. We further prove that
A_2^{q_1} is isomorphic to A_2^{q_2} if and only if either q_1 = q_2 or q_1 =
complex conjugate of q_2. In the second part of our paper, we discuss the
complexity of the representation theory of A_2^q. We show that A_2^q is *-wild
for any q in the circle |q| = 1, and hence that A_2^q is not nuclear for any q
in the circle.Comment: 18 pages, LaTeX2e "article" document class; submitted. V2 clarifies
the relationships between the various deformation systems treate
Integrability by quadratures of Hamiltonian systems and Picard-Fuchs type equations: The modern differential-geometric aspects
Measurement of the decay form factors in the OKA experiment
A precise measurement of the vector and axial-vector form factors difference
in the decay is presented.
About 95K events of are selected in
the OKA experiment. The result is .
Both errors are smaller than in the previous measurements.Comment: 9 pages, 8 figure
Improving the quality of products created by additive technologies on the basis of tig welding
Π ΡΠΎΠ±ΠΎΡΡ ΡΠΎΠ·Π³Π»ΡΠ΄Π°ΡΡΡΡΡ ΠΏΠΈΡΠ°Π½Π½Ρ ΠΎΡΡΠΈΠΌΠ°Π½Π½Ρ ΠΌΡΠ½ΡΠΌΠ°Π»ΡΠ½ΠΎΡ Ρ
Π²ΠΈΠ»ΡΡΡΠΎΡΡΡ ΠΏΠΎΠ²Π΅ΡΡ
ΠΎΠ½Ρ, ΡΠΎ ΡΠΎΡΠΌΡΡΡΡΡΡ Π°Π΄Π΄ΠΈΡΠΈΠ²Π½ΠΈΠΌ ΠΏΡΠΎΡΠ΅ΡΠΎΠΌ Π°ΡΠ³ΠΎΠ½Π½ΠΎ-Π΄ΡΠ³ΠΎΠ²ΠΎΠ³ΠΎ Π·Π²Π°ΡΡΠ²Π°Π½Π½Ρ. ΠΡΠ΄ΠΎΠΌΠΎ, ΡΠΎ Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ½Ρ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΈ Π²Π°Π»ΠΈΠΊΠ° ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ, ΡΠΎ ΠΏΠΎΡΠ°ΡΠΎΠ²ΠΎ ΡΠΎΡΠΌΡΡ Π²ΡΠ΄ΡΠ²ΠΎ-ΡΡΠ²Π°Π½Ρ Π·Π°Π³ΠΎΡΠΎΠ²ΠΊΡ, Π²ΠΈΠ·Π½Π°ΡΠ°ΡΡΡΡΡ ΡΠΊ Π΅Π½Π΅ΡΠ³Π΅ΡΠΈΡΠ½ΠΈΠΌΠΈ, ΡΠ°ΠΊ Ρ ΠΊΡΠ½Π΅ΠΌΠ°ΡΠΈΡΠ½ΠΈΠΌΠΈ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠ°ΠΌΠΈ ΠΏΡΠΎΡΠ΅ΡΡ. ΠΡΠΈ ΡΡΠΎΠΌΡ Π²ΠΈΠΊΠ»Π°Π΄Π°Π½Π½Ρ Π²Π°Π»ΠΈΠΊΡΠ² Π²ΡΠ΄Π±ΡΠ²Π°ΡΡΡΡΡ Π· ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΈΠΌ ΠΏΠ΅ΡΠ΅ΠΊΡΠΈΡΡΡΠΌ, Π·Π°Π²Π΄ΡΠΊΠΈ ΡΠΎΠΌΡ Π²Π΄Π°ΡΡΡΡΡ Π΄ΠΎΡΡΠ³ΡΠΈ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΡ ΡΡΠ»ΡΠ½ΠΎΡΡΡ ΠΌΠΎΠ΄Π΅Π»Ρ, ΠΎΠ΄Π½Π°ΠΊ Π· ΠΎΠ΄Π½ΠΎΡΠ°ΡΠ½ΠΈΠΌ Π²ΠΈΠ½ΠΈΠΊΠ½Π΅Π½Π½ΡΠΌ ΠΏΠ΅Π²Π½ΠΎΡ Ρ
Π²ΠΈΠ»ΡΡΡΠΎΡΡΡ, ΠΎΠ±ΡΠΌΠΎΠ²Π»Π΅Π½ΠΎΡ ΡΠ΅ΡΠΌΠΎΠ΄ΠΈΠ½Π°ΠΌΡΡΠ½ΠΈΠΌΠΈ ΡΠ²ΠΈΡΠ°ΠΌΠΈ Ρ Π²Π°Π½Π½Ρ ΡΠΎΠ·ΠΏΠ»Π°Π²Ρ. ΠΠ°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½Π° ΠΌΠΎΠ΄Π΅Π»Ρ ΡΠΎΡΠΌΡΠ²Π°Π½Π½Ρ Π²Π°Π»ΠΈΠΊΡ Π½Π°ΠΏΠ»Π°Π²Ρ, Π·Π°Π²Π΄ΡΠΊΠΈ ΡΠΊΡΠΉ Π²ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ ΡΠ°ΡΡΠΎΠ½Π°Π»ΡΠ½Ρ ΡΠΌΠΎΠ²ΠΈ Π²ΠΈΠΊΠ»Π°Π΄Π°Π½Π½Ρ ΡΠ°ΡΡΠ². ΠΠ°Π²Π΅Π΄Π΅Π½ΠΎ Π΅ΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½Ρ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ ΠΏΡΠΎΡΠ΅ΡΡ Π°ΡΠ³ΠΎΠ½Π½ΠΎ-Π΄ΡΠ³ΠΎΠ²ΠΎΠ³ΠΎ Π²ΡΠ΄ΡΠ²ΠΎΡΠ΅Π½Π½Ρ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ Π·Π°Π΄Π°Π½ΠΎΡ ΡΠΎΡΠΌΠΈ, ΠΎΡΡΠΈΠΌΠ°Π½ΠΎ ΡΠ΅Π³ΡΠ΅ΡΡΠΉΠ½Ρ ΡΡΠ²Π½ΡΠ½Π½Ρ Π΄Π»Ρ Π²ΠΈΠ·Π½Π°ΡΠ΅Π½Π½Ρ ΠΊΠΎΠ½ΡΡΠΎΠ»ΡΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ Ρ
Π²ΠΈΠ»ΡΡΡΠΎΡΡΡ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΠΎ Π½Π° ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡ Ρ
Π²ΠΈΠ»ΡΡΡΠΎΡΡΡ Π²ΠΈΠΏΠ»ΠΈΠ²Π°ΡΡΡ Π΄ΠΈΠ½Π°ΠΌΡΡΠ½Ρ ΡΠ²ΠΈΡΠ° ΡΠ° Ρ
Π²ΠΈΠ»ΡΠΎΠ²Ρ ΠΏΡΠΎΡΠ΅ΡΠΈ, ΡΠΊΡ ΡΠΎΠ·Π²ΠΈΠ²Π°ΡΡΡΡΡ ΠΏΡΠ΄ Π΄ΡΡΡ ΡΠΈΡΡΠ΅ΠΌΠΈ ΡΠΈΠ» ΠΏΡΠ΄ ΡΠ°Ρ ΡΠΎΡΠΌΡΠ²Π°Π½Π½Ρ Π²Π°Π»ΠΈΠΊΡ Π½Π°ΠΏΠ»Π°Π²Ρ. ΠΠΎΠΊΡΠ°ΡΠ΅Π½Π½Ρ ΡΠΊΠΎΡΡΡ Π²ΠΈΡΠΎΠ±ΡΠ² Π²Π±Π°ΡΠ°ΡΡΡΡΡ Π² ΠΎΠΏΡΠΈΠΌΡΠ·Π°ΡΡΡ ΡΠΏΠΎΡΠΎΠ±ΡΠ² ΡΠΎΡΠΌΡΠ²Π°Π½Π½Ρ Π²Π°Π»ΠΈΠΊΡΠ², Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΠ΅Π½Π½ΡΠΌ Π΄ΠΈΠ½Π°ΠΌΡΡΠ½ΠΎΡ ΡΡΠ°Π»ΠΎΡΡΡ ΡΡΡ
Ρ ΡΠΎΠ±ΠΎΡΠΎΡ Π³ΠΎΠ»ΠΎΠ²ΠΊΠΈ, Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΠ΅Π½Π½ΡΠΌ Π²ΡΠ΄ΠΏΠΎΠ²ΡΠ΄Π½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠ΅ΠΊΡΠΈΡΡΡ ΡΡΠ°ΡΠΊΡΠΎΡΡΠΉ ΡΡΡ
Ρ ΠΏΠΎ ΡΠ°ΡΠ°ΠΌ Π²ΠΈΠΊΠ»Π°Π΄Π°Π½Π½Ρ Π½Π° Π²Π΅Π»ΠΈΡΠΈΠ½Ρ 0,5 Π΅, Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΠ΅Π½Π½ΡΠΌ Π΄ΠΈΠ½Π°ΠΌΡΡΠ½ΠΎΡ ΡΡΠ°Π»ΠΎΡΡΡ ΡΡΡ
Ρ ΡΠΎΠ±ΠΎΡΠΎΡ Π³ΠΎΠ»ΠΎΠ²ΠΊΠΈ, Π²ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Π½ΡΠΌ ΡΠ°ΡΡΠΎΠ½Π°Π»ΡΠ½ΠΎΡ Π΄ΠΎΠ²ΠΆΠΈΠ½ΠΈ Π΄ΡΠ³ΠΈ, Π° ΡΠ°ΠΊΠΎΠΆ ΠΏΡΠ΄ΡΡΠΈΠΌΠ°Π½Π½ΡΠΌ ΡΠ΅ΠΆΠΈΠΌΡ Π΄ΠΈΠ½Π°ΠΌΡΡΠ½ΠΎΡ ΡΡΠ°Π»ΠΎΡΡΡ Π³ΠΎΡΡΠ½Π½Ρ Π΄ΡΠ³ΠΈ ΠΠΎΠ±ΡΠ΄ΠΎΠ²Π°Π½ΠΎ ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ Π²ΡΠ΄Π³ΡΠΊΡΠ² ΡΡΠ»ΡΠΎΠ²ΠΈΡ
ΡΡΠ½ΠΊΡΡΠΉ Π² ΠΏΠ»ΠΎΡΠΈΠ½Π°Ρ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡΠ² Π²ΠΏΠ»ΠΈΠ²Ρ, ΡΠΊΡ Π΄ΠΎΠ·Π²ΠΎΠ»ΡΡΡΡΡΡ Π½Π°Π³Π»ΡΠ΄Π½ΠΎ ΠΏΡΠΎΡΠ»ΡΡΡΡΡΠ²Π°ΡΠΈ Π·Π°Π»Π΅ΠΆΠ½ΡΡΡΡ ΠΊΠΎΠ½ΡΡΠΎΠ»ΡΠΎΠ²Π°Π½ΠΈΡ
Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ½ΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡΠ² ΡΠ²Π° Π²ΡΠ΄ ΠΎΠΊΡΠ΅ΠΌΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡΠ² Π²ΠΏΠ»ΠΈΠ²Ρ.The paper deals with the issues of obtaining the minimum waviness of surfaces formed by additive processes of TIG welding. It is known that the geometric parameters of the melt bead, which form a reproducible workpiece layer by layer, are determined by both the energy and kinematic characteristics of the process. In this case, the laying of the rollers occurs with optimal overlap, as a result of which it is possible to achieve the maximum density of the model, however, with the simultaneous appearance of a certain waviness due to thermodynamic phenomena in the melt bath. The proposed model of the formation of a bead of melt, the use of which made it possible to establish the rational conditions for laying out the layers. Experimental studies of the process of argon-arc surfacing of models of a given, regression equations for determining the controlled waviness parameter are obtained. It is shown that the waviness parameter is influenced by dynamic phenomena and wave processes that develop under the action of a system of forces during the formation of a melt bead. An improvement in the quality of products is seen in the optimization of the methods of forming the rollers, in ensuring the dynamic stability of the movement of the working head, ensuring the appropriate overlap of the trajectories of movement along the layers of the layout by an amount of 0.5e, establishing a rational arc length, and maintaining the dynamic stability of the arc burning. The response surfaces of the objective functions in the planes of the process parameters are constructed, which provide a clear illus-tration of the dependence of the controlled geometric parameters on the welding modes.Π ΡΠ°Π±ΠΎΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ Π²ΠΎΠΏΡΠΎΡΡ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ ΠΌΠΈΠ½ΠΈΠΌΠ°Π»ΡΠ½ΠΎΠΉ Π²ΠΎΠ»Π½ΠΈΡΡΠΎΡΡΠΈ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ΅ΠΉ, ΡΠΎΡΠΌΠΈΡΡΠ΅ΠΌΠΎΠΉ Π°Π΄Π΄ΠΈΡΠΈΠ²Π½ΡΠΌΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠ°ΠΌΠΈ Π°ΡΠ³ΠΎΠ½Π½ΠΎ-Π΄ΡΠ³ΠΎΠ²ΠΎΠΉ ΡΠ²Π°ΡΠΊΠΈ. ΠΠ·Π²Π΅ΡΡΠ½ΠΎ, ΡΡΠΎ Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ Π²Π°Π»ΠΈΠΊΠ° ΡΠ°ΡΠΏΠ»Π°Π²Π°, ΠΊΠΎΡΠΎΡΡΠΌΠΈ ΠΏΠΎΡΠ»ΠΎΠΉΠ½ΠΎ ΡΠΎΡΠΌΠΈΡΡΠ΅ΡΡΡ Π²ΠΎΡΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΠΌΠ°Ρ Π·Π°Π³ΠΎΡΠΎΠ²ΠΊΠ°, ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡΡΡ ΠΊΠ°ΠΊ ΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ, ΡΠ°ΠΊ ΠΈ ΠΊΠΈΠ½Π΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠ°ΠΌΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠ°. ΠΡΠΈ ΡΡΠΎΠΌ Π²ΡΠΊΠ»Π°Π΄ΠΊΠ° Π²Π°Π»ΠΈΠΊΠΎΠ² ΠΏΡΠΎΠΈΡΡ
ΠΎΠ΄ΠΈΡ Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠΌ ΠΏΠ΅ΡΠ΅ΠΊΡΡΡΠΈΠ΅ΠΌ, Π² ΡΠ»Π΅Π΄ΡΡΠ²ΠΈΠ΅ ΡΠ΅Π³ΠΎ ΡΠ΄Π°Π΅ΡΡΡ Π΄ΠΎΡΡΠΈΡΡ ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ ΠΌΠΎΠ΄Π΅Π»ΠΈ, ΠΎΠ΄Π½Π°ΠΊΠΎ Ρ ΠΎΠ΄Π½ΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΌ Π²ΠΎΠ·Π½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΠ΅ΠΌ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Π½ΠΎΠΉ Π²ΠΎΠ»Π½ΠΈΡΡΠΎΡΡΠΈ, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΠΎΠΉ ΡΠ΅ΡΠΌΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΡΠ²Π»Π΅Π½ΠΈΡΠΌΠΈ Π² Π²Π°Π½Π½Π΅ ΡΠ°ΡΠΏΠ»Π°Π²Π°. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½Π°Ρ ΠΌΠΎΠ΄Π΅Π»Ρ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π²Π°Π»ΠΈΠΊΠ° ΡΠ°ΡΠΏΠ»Π°Π²Π°, ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΊΠΎΡΠΎΡΠΎΠΉ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ»ΠΎ ΡΡΡΠ°Π½ΠΎΠ²ΠΈΡΡ ΡΠ°ΡΠΈΠΎΠ½Π°Π»ΡΠ½Ρ ΡΡΠ»ΠΎΠ²ΠΈΡ Π²ΡΠΊΠ»Π°Π΄ΠΊΠΈ ΡΠ»ΠΎΠ΅Π². ΠΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΡΠ΅ΡΡΠ° Π°ΡΠ³ΠΎΠ½Π½ΠΎ-Π΄ΡΠ³ΠΎΠ²ΠΎΠΉ Π½Π°ΠΏΠ»Π°Π²ΠΊΠΈ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ Π·Π°Π΄Π°Π½Π½ΠΎΠΉ ΡΠΎΡΠΌΡ, ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ ΡΠ΅Π³ΡΠ΅ΡΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ Π΄Π»Ρ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΊΠΎΠ½ΡΡΠΎΠ»ΠΈΡΡΠ΅ΠΌΠΎΠ³ΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ° Π²ΠΎΠ»Π½ΠΈΡΡΠΎΡΡΠΈ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π½Π° ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡ Π²ΠΎΠ»Π½ΠΈΡΡΠΎΡΡΠΈ Π²Π»ΠΈΡΡΡ Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²Π»Π΅Π½ΠΈΡ ΠΈ Π²ΠΎΠ»Π½ΠΎΠ²ΡΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΡ, ΠΊΠΎΡΠΎΡΡΠ΅ ΡΠ°Π·Π²ΠΈΠ²Π°ΡΡΡΡ ΠΏΠΎΠ΄ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ ΡΠΈΡΡΠ΅ΠΌΡ ΡΠΈΠ» ΠΏΡΠΈ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ Π²Π°Π»ΠΈΠΊΠ° ΡΠ°ΡΠΏΠ»Π°Π²Π°. Π£Π»ΡΡΡΠ΅Π½ΠΈΠ΅ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° ΠΈΠ·Π΄Π΅Π»ΠΈΠΉ Π²ΠΈΠ΄ΠΈΡΡΡ Π² ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ ΡΠΏΠΎΡΠΎΠ±ΠΎΠ² ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π²Π°Π»ΠΈΠΊΠΎΠ², Π² ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΠΈ Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΡΠ°Π±ΠΎΡΠ΅ΠΉ Π³ΠΎΠ»ΠΎΠ²ΠΊΠΈ, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠ΅Π³ΠΎ ΠΏΠ΅ΡΠ΅ΠΊΡΡΡΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ ΠΏΠΎ ΡΠ»ΠΎΡΠΌ Π²ΡΠΊΠ»Π°Π΄ΠΊΠΈ Π½Π° Π²Π΅Π»ΠΈΡΠΈΠ½Ρ 0,5Π΅, ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΠ΅ΠΌ ΡΠ°ΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠΉ Π΄Π»ΠΈΠ½Ρ Π΄ΡΠ³ΠΈ, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ΠΌ ΡΠ΅ΠΆΠΈΠΌΠ° Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ Π³ΠΎΡΠ΅Π½ΠΈΡ Π΄ΡΠ³ΠΈ. ΠΠΎΡΡΡΠΎΠ΅Π½ΠΎ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΎΡΠΊΠ»ΠΈΠΊΠ° ΡΠ΅Π»Π΅Π²ΡΡ
ΡΡΠ½ΠΊΡΠΈΠΉ Π² ΠΏΠ»ΠΎΡΠΊΠΎΡΡΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΏΡΠΎΡΠ΅ΡΡΠ°, ΠΊΠΎΡΠΎΡΡΠ΅ Π΄Π°ΡΡ Π½Π°Π³Π»ΡΠ΄Π½ΡΡ ΠΈΠ»Π»ΡΡΡΡΠ°ΡΠΈΡ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΊΠΎΠ½ΡΡΠΎΠ»ΠΈΡΡΠ΅ΠΌΡΡ
Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΎΡ ΡΠ΅ΠΆΠΈΠΌΠΎΠ² ΡΠ²Π°ΡΠΊΠΈ
Observation of a New J(PC)=1(+-) Isoscalar State in the Reaction Pi- Proton -> Omega Eta Neutron at 18 GeV/c
Results are presented on a partial wave analysis of the Omega Eta final state
produced in Pi- Proton interactions at 18 GeVc where Omega -> Pi+ Pi- Pi0, Pi0
-> 2 Gammas, and Eta -> 2 Gammas. We observe the previously unreported decay
mode Omega(1650) -> Omega Eta and a new 1(+-) meson state h1(1595) with a mass
M=1594(15)(+10)(-60) MeV/c^2 and a width Gamma=384(60)(+70)(-100) MeV/c^2. The
h1(1595) state exhibits resonant-like phase motion relative to the Omega(1650).Comment: Submitted to Physics Letters B Eight total pages including 11 figures
and 1 tabl
Searches for the light invisible axion-like particle in decay
A high statistics data sample of the decays is recorded by the OKA
collaboration. A missing mass analysis is performed to search for a light
invisible pseudoscalar axion-like particle (ALP) in the decay . No signal is observed, the upper limits for the branching
ratio of the decay are calculated. The confidence level upper limit is
changing from to for the ALP mass from 0 to
200 MeV/, except for the region of mass, where the upper limit
is .Comment: 6 pages, 6 figure
Structural and spatially-resolved studies on the hardening of a commercial resin-modified glass-ionomer cement
A commercial photopolymerizable resinmodified glass-ionomer (Fuji II LC) was studied using a variety of nuclear magnetic resonance (NMR) techniques. H and F stray-field imaging (STRAFI) enabled to follow the acidβbase reaction kinetics in self-cured (SC) samples. Gelation and maturation processes with 25 min and 40 h average time constants, respectively, were distinguished. In self- & photo-cured (SPC) samples, two processes were also observed, which occurred with 2 s and 47 s average time constants. H, Al and Si magic angle spinning (MAS) NMR, C cross-polarization (CP)/MAS NMR and 27Al multiple quanta (MQ)MAS NMR spectroscopy were used to obtain structural information on the glass and cements that were either SC or SPC. The presence of methacrylate groups was identified in the solid component. Unreacted hydroxyl ethylmethacrylate (HEMA) was detected in self-cured cement. Al data showed that approximately 28% and 20% of Al is leached out from glass particles in SC and SPC samples, respectively. The upfield shift detected in 25Si MAS NMR spectra of the cements is consistent with a decrease in the number of Al species in the second coordination sphere of the silicon structures. Scanning electron microscopy (SEM) showed existence of 3D shrinkage of the cement matrix in photo-cured cements.(undefined
Uniform design and analysis of iterative learning control for a class of impulsive first-order distributed parameter systems
- β¦