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1
Symulatory szkoleniowe VR zmieniają oblicze szkoleń operatorów maszyn
Tarnawski Leszek, Janiak Tomasz
Logistyka
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2022
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nr 6
32--35
PL
Gogle VR są już szeroko stosowane w treningu umiejętności miękkich, a trójmiejski startup Flint Systems z powodzeniem udowodnił, że można je również wykorzystać w treningu umiejętności twardych. Porty, logistyka, offshore, wojsko, budownictwo, energetyka, edukacja – to tylko kilka sektorów, które mogą skorzystać na szkoleniu symulacyjnym VR.
2
Content available remote Digital filters: hermitian, antihermitian, unitary and their applications
Siwczyński M., Jaraczewski M.
Technical Transactions
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2017
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Vol. 1(114)
101--112
EN
The paper presents the relation between the three types of noncausal digital filters: unitary, Hermitian and antihermitian filters. A decomposition has been made of a causal filter into a Hermitian and unitary filter cascade, and the use of this decomposition to calculate the electric power quality of receivers has been highlighted. Reference has also been made to the analogy between the set of unitary filters and the unit circle in the Gaussian plane.
PL
W artykule podano związek między trzema typami nieprzyczynowych filtrów cyfrowych: filtrami unitarnymi, hermitowskimi i antyhermitowskimi. Dokonano też rozkładu filtru przyczynowego na kaskadę filtru hermitowskiego i unitarnego, oraz zwrócono uwagę na zastosowanie tego rozkładu do jakościowo-energetycznej oceny odbiorników energii elektrycznej. Nawiązano też do analogii zbioru filtrów unitarnych i okręgu jednostkowego na płaszczyźnie Gaussa.
3
Content available remote Minimalizacja wahań napięcia sieci elektrycznej w stanach przejściowych quasiharmonicznych
Siwczyński M., Drwal A., Żaba S.
Przegląd Elektrotechniczny
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2017
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R. 93, nr 10
146--148
PL
W artykule rozwiązano zagadnienie minimalizacji normy wahania napięcia rzeczywistego źródła energii elektrycznej, które zastępuje złożoną sieć zasilającą, uwzględniając również stany przejściowe. Stany te wywoływane są zmianami poboru mocy czynnej od strony odbiornika i kołysaniami sygnału napięcia źródłowego sieci. Użyto nowego aparatu matematycznego wynikłego z połączenia pojęcia ruchomej mocy czynnej i modulacji sygnałów harmonicznych.
EN
In the paper was solved the problem of minimizing the standard voltage fluctuations real source of electricity, which replaces a complex supply network, also taking into account transient states. These states are caused by changes in active power consumption from the receiver and signal rocking of voltage source network. It was used a new mathematical concepts resulting from the merger of moving active power and harmonic signals modulation.
4
Content available remote On some operations on finite affine planes applied to the theory of regular configurations
Makowiecka H.
Demonstratio Mathematica
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2010
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Vol. 43, nr 1
167-185
EN
We consider some operations on affine planes which resemble the construction of a derived affine plane at a point of the Benz plane. We call them Benz-contractions (B-contractions) , distinguishing between chain contractions and generator contractions. We prove that the Pappos-Pascal configuration is the B-contraction of the affine plane of order 4 and we relate it to the Havlicek-Tietze configuration. We present a new (HT)o-configuration and research some problems of embeddability for (P-P), (H-T), and (HT)o. We propose a method of finding (n - 2) regular configurations on an arbitrary affine plane of order n. Among them are pairs of configurations with dual type and each such a pair can be completed with one point and n -f 1 lines to the initial plane. We prove that for an arbitrary n odd, the non-existence of the symmetric configuration ( n2-1/2, n+1/2) the non-existence of the projective plane of order n. On the basis of Gropp's article flOj, we solve some current problems concerning the existence of non-symmetric configurations with a natural index.
5
Content available remote Second order evolution problem with dependent on t and not densely defined operators
Winiarska T.
Demonstratio Mathematica
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2009
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Vol. 42, nr 3
513-520
EN
The purpose of this paper is to present some theorems on existence and uniqueness of solution for nonautonomous second order Cauchy problem with a dumping operator and with dependent on t not densely defined operators.
6
Content available remote Porosity of certain classes of operators in generalized metric spaces
Das P., Dey L.
Demonstratio Mathematica
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2009
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Vol. 42, nr 1
163-174
EN
We study the porosity behavior of non-contractive mappings in a generalized metric space, a concept recently introduced in [1]. We also investigate partially the porosity position of a certain class of operators whose condition arises from [8].
7
Content available remote On preserves on singularity and nonsingularity of matrices
Kalinowski J.
Demonstratio Mathematica
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2009
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Vol. 42, nr 4
681-685
EN
Operators preserving singularity and nonsingularity of matrices were studied in paper of P. Botta under the assumption that operators are linear. In the present paper the linearity of operators is not assumed: we only assume that operators are of the form T = (fi,j), wherei,j : K -> K and K is a field, i,j is an element of {1,2,...,n}. If n > 3, then in the matrix space Mn(K] operators preserving singularity and nonsingularity of matrices must be as in paper of P. Botta. If n < 2, operators may be nonlinear. In this case the forms of the operators are presented.
8
Content available remote Direct theorems for modified Basakov operators in Lp-spaces
Maheshwari P.
Demonstratio Mathematica
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2009
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Vol. 42, nr 3
553-565
EN
In the year 1993, Gupta and Srivastava [3] introduced the integral modication of the well known Basakov operators by taking the weight functions of Szasz basis function, so called Baskakov-Szasz operators. To prove our one of the direct theorems, we use the technique of a mathematical tool which is the linear approximating method and is known as the Steklov means.
9
Content available remote On preservers of determinant over a field
Kalinowski J.
Demonstratio Mathematica
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2008
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Vol. 41, nr 3
519-524
EN
Operators preserving the determinant of real matrices were studied in [1], [2] and [5] under assumption that the operator is linear. In this paper the linearity of the operators is not assumed: we only assume that the operators are of the form F = [fi,j], where functions fij : [...], we characterize these operators from [...] into itself preserving the determinant. An operator preserving the determinant of matrices must be linear as in [4]. The form of operator F is presented.
10
Content available remote Strong convergence of an implicit iteration process for a finite family of quasi-contractive operators
Rafiq A.
Demonstratio Mathematica
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2007
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Vol. 40, nr 1
203-208
EN
The purpose of this paper is to establish a strong convergence of an implicit iteration process to a common fixed point for a finite family of quasi-contractive operators. Our theorems give an armative response to a question raised by [Xu and Ori, Numer. Funct. Anal. Optim. 22 (2001) 767-773 ].
11
Content available remote Horizontal and complete lift of Fa(K,1)-structure in the tangent bundle
Prasad C., Chauhan P.
Demonstratio Mathematica
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2007
|
Vol. 40, nr 2
441-448
EN
Prasad and Gupta [2] have obtained the integrability conditions of a structure satisfying FK -a2F = 0. The complete lift of Flambda-structure in tangent bundle was studied by Awasthi and Gupta [1]. In the present paper, we have studied the horizontal & complete lifts of Fa(K, 1)-structure in the tangent bundle.
12
Content available remote The superposition operator for vector-valued functions on a noncompact interval
Dronka J., Olszowy L.
Demonstratio Mathematica
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2006
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Vol. 39, nr 2
411-418
EN
In this paper the superposition operator in the space of vector-valued, bounded and continuous functions on a noncompact interval is considered. Acting conditions and criteria of continuity and compactness are established. As an application, an existence result for the nonlinear Hammerstein integral equation in this space is obtained.
13
Content available remote The controllability of the system described by right invertible operators with constrained controls
Thi H.
Demonstratio Mathematica
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2006
|
Vol. 39, nr 3
599-608
EN
This paper is to deal with the controllability of the linear system described by right invertible operators with constrained controls in Banach space.
14
Content available remote Selections and common fixed points for some generalized multivalued contractions
Sintamarian A.
Demonstratio Mathematica
|
2006
|
Vol. 39, nr 3
609-617
EN
We show that some generalized multivalued contractions admit selections which are Caristi type mappings. Another purpose of this paper is to give a common fixed point theorem for two multivalued contractive type mappings defined on a closed ball of a complete metric space with values in the set of all nonempty and closed subsets of this space.
15
Content available remote Order properties of the space of A-linear operators
Turan B.
Demonstratio Mathematica
|
2006
|
Vol. 39, nr 2
429-438
EN
Let A be an f-algebra with unit and L, M be two topologically full f-modules on A. We prove that the space of A-linear operators Lb(L, M; A) is a Riesz space and we study the order properties of the adjoint operator from Lb(L, M; A) to Lb(M~, L~; (A)^n). The main result given here describes the centre of the space of Lb{L, M; A).
16
Content available remote On the finite spectra of the difference operator nabla over the sequence space lp, (1
Akhmedov A., Basar F.
Demonstratio Mathematica
|
2006
|
Vol. 39, nr 3
585-595
EN
In the present paper, the norm of the bounded linear operator nabla acting on the sequence space Lp has been found and the fine spectrum with respect to Goldberg's classification of the difference operator nabla over the sequence space Lp has been determined, where 1 < p < oo.
17
Content available remote On residualities in the set of Markov continuous semigroups on C1
Kuna B.
Demonstratio Mathematica
|
2006
|
Vol. 39, nr 2
439-453
EN
We show that the set of all stochastic strongly continuous semigroups on C1 such that limt-oo |||T(t) - Qx*||| = 0, where Qx* is one-dimensional projection for some state X*, is norm open and dense. Moreover this set forms a norm dense Gb if a state X* is strictly positive.
18
Content available remote On linear operators consistent with a subspace in differential spaces
Multarzyński P.
Demonstratio Mathematica
|
2006
|
Vol. 39, nr 1
233-244
EN
Linear operators on function and abstract algebras are considered and their consistency with an arbitrary subset or an ideal is studied. Then the consistency concept is formulated for general Poisson brackets in commutative algebras.
19
Content available remote Lifting of vector fields to 1-forms on r-jet prolongation of the bundle of tensors of type (0,2)
Michalec P.
Demonstratio Mathematica
|
2006
|
Vol. 39, nr 2
471-481
EN
For natural numbers n > 2 and r > 1 all natural operators T* (Jr(*2T*)) lifting vector fields from n-manifolds M into 1-forms on Jr(*2T*) are classified. It's proved that the set of all natural operators A.
20
Content available remote Ishikawa iterative sequence with errors for k-subaccetive operators in arbitrary Banach spaces
Li Y.
Demonstratio Mathematica
|
2006
|
Vol. 39, nr 1
161-168
EN
In this paper, the iterative solution is studied for equation x+Tx =f with a Lipschitz K-subaccetive operator in arbitrary Banach spaces, some previously results are generalized.
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