Keresés
29 találatból megjelenítve: 11-20
Cím: Hydraulic Analysis of a Meander on the Danube River Using a 2d Flow Model
Szerző: ; ; ;
Dátum: 2020
Feltöltve: 2023-02-16
(2020)
This paper presents the development, calibration and verification of a two-dimensional modelfor a Danube reach and its old cutoff meander. Theconsidered meander was at one point separated fromthe main reach with a levee, ...
Cím: Restricted r-Stirling Numbers and Their Combinatorial Applications
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Dátum: 2019
Feltöltve: 2023-02-20
(2019)
We study set partitions with r distinguished elements and block sizes found in an arbitrary index set S . The enumeration of these ( S, r )-partitions leads to the introduc- tion of ( S, r )-Stirling numbers, an extremely ...
Cím: Mixed Restricted Stirling Numbers
Szerző: ; ; ;
Dátum: 2019
Feltöltve: 2023-02-20
(2019)
We investigate mixed partitions with extra condition on the sizes of the blocks. We give a general formula and the generating function. We consider in more details a special case, determining the generating functions, some ...
Cím: Restricted Lonesum Matrices
Szerző:
Dátum: 2018
Feltöltve: 2023-02-20
(2018)
"Lonesum matrices are matrices that are uniquely reconstructible from their row and column sum vectors. These matrices are enumerated by the poly-Bernoulli numbers"," a sequence related to the multiple zeta values with a ...
Cím: A Combinatorial Analysis of Higher Order Generalised Geometric Polynomials: A Generalisation of Barred Preferential Arrangements
Szerző: ; ; ;
Dátum: 2020
Feltöltve: 2023-02-16
(2020)
Abarredpreferentialarrangementisapreferentialarrangement,ontowhichin-between the blocks of the preferential arrangement a number of identical bars are inserted. We offer a generalisation of barred preferential arrangements ...
Cím: Mixed Coloured Permutations
Szerző: ;
Dátum: 2020
Feltöltve: 2023-02-16
(2020)
In this paper, we introduce mixed coloured permutations, permutations with certain coloured cycles, and study the enumerative properties of these combinatorial objects. We derive the generating function, closed forms, ...
Cím: Laboratory experiments on the influence of stratification and a bottom sill on seiche damping
Szerző: ; ;
Dátum: 2021
Feltöltve: 2023-02-16
(2021)
The damping of water surface standing waves (seiche modes) and the associated excitation of baroclinic internal waves are studied experimentally in a quasi-two-layer laboratory setting with a topographic obstacle at the ...
Cím: Fluid Flow Model Applied for Environmental Problems at a Combined Sewer Structure
Szerző: ; ;
Dátum: 2021
Feltöltve: 2023-02-20
(2021)
A junction structure of the greatest combined sewers of Budapest (Hungary) was under hydrodynamic and water quality examinations. The selected junction performs an important role in the operation of a combined sewer overflow. ...
Cím: Bijective enumerations of ?-free 0–1 matrices
Szerző: ;
Dátum: 2018
Feltöltve: 2023-02-20
(2018)
We construct a new bijection between the set of n × k 0–1 matrices with no three 1’s forming a ? configuration and the set of ( n, k )-Callan sequences, a simple structure counted by poly-Bernoulli numbers. We give two ...
Cím: Some applications of S-restricted set partitions
Szerző: ;
Dátum: 2019
Feltöltve: 2023-02-20
(2019)
In the paper, the authors present several new relations and applications for the combinatorialsequence that counts the possible partitions of a finite set with the restriction that the size ofeach block is contained in a ...