Keresés
175 találatból megjelenítve: 131-140
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: 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 ...
Cím: Effect of Aeration on Residence Time in Biological Wastewater Treatment
Szerző:
Dátum: 2018
Feltöltve: 2023-02-20
(2018)
Aerobic wastewater treatment requires extensive aeration, which primary function is to provide oxygen to the biomass responsible fordegradation of wastewater constituents. Besides the effective oxygen transfer efficiency ...
Cím: Secondary Stochastic Processes and Storage Reservoir Optimization
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Dátum: 2018
Feltöltve: 2023-02-20
(2018)
In the first two sections of the paper, stream flow is investigated on a probability theoretical basis. We will show that under some realistic conditions its probability distribution is of gamma type. In the model of the ...
Cím: Analysis of Reverse Osmosis Filter Permeability
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Dátum: 2018
Feltöltve: 2023-02-20
(2018)
Unsuitable feed water quality causes fouling and serious decrease in membrane permeability during the operation of reverse osmosis filters, which leads to costly operation and low contaminant removal efficiency. The purpose ...
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: Poly-Bernoulli Numbers and Eulerian Numbers
Szerző: ;
Dátum: 2018
Feltöltve: 2023-02-20
(2018)
In this note we prove, using combinatorial arguments, some new formulas connecting Poly-Bernoulli numbers with negative indices to Eulerian numbers.
Cím: Heterogeneity and Anthropogenic Impacts on a Small Lowland Stream
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Dátum: 2019
Feltöltve: 2023-02-17
(2019)
During our work, we investigated the physical and chemical variables of a small surface watercourse to investigate how different anthropogenic effects affect its water quality. Along this small watercourse, there are ...
Cím: Exploitation of Algal-Bacterial Consortia in Combined Biohydrogen Generation and Wastewater Treatment
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Dátum: 2019
Feltöltve: 2023-02-17
(2019)
Microalgae cultivation in municipal, industrial, and agricultural wastewater is an emerging, highly effective approach for resource recovery and concomitant bioenergy generation. Wastewater effluents represent ideal sources ...
Cím: Trait-based community assembly of epiphytic diatoms in saline astatic ponds: a test of the stress-dominance hypothesis
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Dátum: 2019
Feltöltve: 2023-02-17
(2019)
The stress dominance hypothesis (SDH) postulates that strong environmental gradients drive trait convergence in communities over limiting similarity. Previous studies, conducted mostly with terrestrial plant communities, ...