On spectral properties of elliptic problems in domains with cylindrical ends

2007 ◽  
pp. 123-139 ◽  
Author(s):  
B. A. Plamenevskii
Keyword(s):  
Spectral Properties ◽  
Elliptic Problems

scholarly journals SPECTRAL DEFORMATIONS FOR QUASICYLINDRICAL DOMAINS

2013 ◽  
Vol 15 (04) ◽  
pp. 1250065 ◽  
Author(s):  
VICTOR KALVIN
Keyword(s):  
Long Range ◽  
Spectral Properties ◽  
Schrödinger Operators ◽  
Elliptic Problems ◽  
Schrodinger Operators ◽  
Bounded Set

We consider quasicylindrical domains that outside a bounded set coincide with long-range geometric perturbations of semi-cylinders. On the example of Dirichlet Laplacians we show that the method of spectral deformations, originating from the theory of Schrödinger operators, can be used to study spectral properties of elliptic problems in quasicylindrical domains.

Model of multicomponent narrow-band periodical non-stationary random signal

2020 ◽  
Vol 2020 (48) ◽  
pp. 17-24
Author(s):  
I.M. Javorskyj ◽  
◽  
R.M. Yuzefovych ◽  
P.R. Kurapov ◽  
◽  
...  
Keyword(s):  
Time Series ◽  
Real Time ◽  
Hilbert Transform ◽  
Spectral Properties ◽  
Narrow Band ◽  
Analytic Signal ◽  
Random Signal ◽  
Hilbert Transformation ◽  
The Hilbert Transform

The correlation and spectral properties of a multicomponent narrowband periodical non-stationary random signal (PNRS) and its Hilbert transformation are considered. It is shown that multicomponent narrowband PNRS differ from the monocomponent signal. This difference is caused by correlation of the quadratures for the different carrier harmonics. Such features of the analytic signal must be taken into account when we use the Hilbert transform for the analysis of real time series.

Structure and Spectral Properties of New Composites Based on Metal Alkanoates with Gold Nanoparticles

2015 ◽  
Vol 60 (04) ◽  
pp. 356-361 ◽  
Author(s):  
A. Tolochko ◽  
◽  
P. Teselko ◽  
A. Lyashchova ◽  
D. Fedorenko ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Spectral Properties

PHYSICOCHEMICAL POINTS OF SYNTHESIS OF LONG PERSISTENCE PHOSPHORS ON THE BASIS OF YTTRIUM OXOSULFIDE. REPORT 3. STUDY OF Er3+ IONS INFLUENCE ON SPECTRAL PROPERTIES OF Y2O2S: Ti, Mg

2007 ◽  
Vol 3 (2) ◽  
pp. 20-26
Author(s):  
A.A. Bogatureva ◽  
◽  
V.M. Ishenko ◽  
O.Y. Manashirov ◽  
A.N. Georgobiani ◽  
...  
Keyword(s):  
Spectral Properties

Cline’s formula for g-Drazin inverses in a ring

Filomat ◽  
2019 ◽  
Vol 33 (8) ◽  
pp. 2249-2255
Author(s):  
Huanyin Chen ◽  
Marjan Abdolyousefi
Keyword(s):  
Operator Theory ◽  
Spectral Properties ◽  
Associative Ring ◽  
Linear Operators ◽  
Drazin Inverse ◽  
Bounded Linear Operators ◽  
Bounded Linear ◽  
Cline’S Formula

It is well known that for an associative ring R, if ab has g-Drazin inverse then ba has g-Drazin inverse. In this case, (ba)d = b((ab)d)2a. This formula is so-called Cline?s formula for g-Drazin inverse, which plays an elementary role in matrix and operator theory. In this paper, we generalize Cline?s formula to the wider case. In particular, as applications, we obtain new common spectral properties of bounded linear operators.

Syntheses, spectral properties and pesticide activity of O-ethyl-S-propyl-O-(1-alkyl, phenyl-5-chloro, alkoxy-6-oxo-1H-pyridazine-4-yl)esters of dithiophosphoric acid

1980 ◽  
Vol 45 (8) ◽  
pp. 2247-2253 ◽  
Author(s):  
Václav Konečný ◽  
Štefan Varkonda ◽  
Vojtech Kubala
Keyword(s):  
Spectral Properties ◽  
Uv Spectra ◽  
Dithiophosphoric Acid ◽  
Insecticide Activity ◽  
Ir And Uv Spectra

Syntheses of O-ethyl-S-propyl-O-(1-alkyl, phenyl-5-chloro, alkoxy-6-oxo-1H-pyridazine-4-yl) esters of dithiophosphoric acid are described. The compounds were investigated for their IR and UV spectra and for their contact and system activities as insecticides, acaricides, ovicides, fungicides and herbicides. Some of the compounds proved efficient acaricides; compound VIII also had an insecticide activity.

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