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Wyświetlanie 1-25 z 294
Tytuł:
Kataliza heterogeniczna
Autorzy:
Rachwalik, R.
Ogonowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/273835.pdf
Data publikacji:
2010
Wydawca:
Roble
Tematy:
kataliza heterogeniczna
katalizatory heterogeniczne
jonon
heterogeneous catalysis
heterogeneous catalysts
ionium
Źródło:
LAB Laboratoria, Aparatura, Badania; 2010, 15, 2; 19-26
1427-5619
Pojawia się w:
LAB Laboratoria, Aparatura, Badania
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified Distributed Arithmetic Concept for Implementations Targeted at Heterogeneous FPGAs
Autorzy:
Rawski, M.
Powiązania:
https://bibliotekanauki.pl/articles/226835.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
distributed arithmetic
FPGA
heterogeneous programmable structures
Opis:
Distributed Arithmetic (DA) plays an important role in designing digital signal processing modules for FPGA architectures. It allows replacing multiply-and-accumulate (MAC) operations with combinational blocks. The quality of implementations based on DA strongly depends on efficiency of methods that map combinational DA block into FPGA resources. Since modern FPGAs have heterogeneous structure, there is a need for quality algorithms to target these structures and the need for flexible architecture exploration aiding in appropriate mapping. The paper presents a modification of DA concept that allows for very efficient implementation in heterogeneous FPGA architectures.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 4; 345-350
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Complex Dynamics in a Bertrand Duopoly Game with Heterogeneous Players
Autorzy:
Dubiel-Teleszyński, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/483303.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Bertrand duopoly
heterogeneous expectations
nonlinear dynamics
chaos
Opis:
A heterogeneous Bertrand duopoly game with bounded rational and adaptive players manufacturing differentiated products is subject of investigation. The main goal is to demonstrate that participation of one bounded rational player in the game suffices to destabilize the duopoly. The game is modelled with a system of two difference equations. Evolution of prices over time is obtained by iteration of a two dimensional nonlinear map. Equilibria are found and local stability properties thereof are analyzed. Complex behavior of the system is examined by means of numerical simulations. Region of stability of the Nash equilibrium is demonstrated in the plane of the speeds of adjustment. Period doubling route to chaos is presented on the bifurcation diagrams and on the largest Lyapunov characteristic exponent graph. Lyapunov time is calculated. Chaotic attractors are depicted and their fractal dimensions are computed. Sensitive dependence on initial conditions is evidenced.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2010, 2, 2; 95-116
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maintenance problems of technical systems composed of heterogeneous elements
Autorzy:
Jodejko, A.
Powiązania:
https://bibliotekanauki.pl/articles/2069556.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
multi-unit system
heterogeneous system
block maintenance policy
economic dependency
Opis:
The paper gives a short insight into the complexity of maintenance problems of a system composed of heterogeneous elements. The article proposes a simple algorithm to define parameters of block maintenance policy of multi-unit systems composed of elements with economic dependency. The procedure may be used especially in the case when elements of a system are not identical in the sense of their probability characteristics and analytical solution is inaccessible.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 1; 187--193
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Input Variable Partitioning Method for Decomposition-Based Logic Synthesis targeted Heterogeneous FPGAs
Autorzy:
Rawski, M.
Powiązania:
https://bibliotekanauki.pl/articles/227236.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
functional decomposition
heterogeneous FPGA
bound set selection
Opis:
The functional decomposition has found an application in many fields of modern engineering and science, such as combinational and sequential logic synthesis for VLSI systems, pattern analysis, knowledge discovery, machine learning, decision systems, data bases, data mining etc. It is perceived as one of the best logic synthesis methods for FPGAs. However, its practical usefulness for very complex systems depends on efficiency of method used in decomposition calculation. One of the most important steps in functional decomposition construction is selection of the appropriate input variable partitioning. In case of modern heterogeneous programmable structures efficiency of methods used to solve this problem becomes especially important. Since the input variable partitioning problem is an NP-hard, heuristic methods have to be used to efficiently and effectively search for optimal or near-optimal solutions. The paper presents a method for bound set selection in functional decomposition targeted FPGAs with heterogeneous structure. This heuristic algorithm delivers optimal or near optimal results and is much faster than other methods.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 1; 15-20
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solving a large heterogeneous-agent general equilibrium model with labour market frictions
Autorzy:
Antosiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/205786.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
heterogeneous–agent model
search and matching
DSGE
computational metod
Opis:
In this paper we build and solve a heterogeneous-agent dynamic stochastic general equilibrium (DSGE) model with incomplete markets in the spirit of Krussel and Smith (1998). We expand this model to account for search and matching labour market frictions, using the classic Mortensen and Pissarides (1994) framework. The model, therefore, combines two important strands of economic modelling and presents a numerical challenge in terms of solving the model due to the inclusion of additional dimensions in the optimization problem. Despite the addition of additional state variables and higher dimensionality, we show that we are able to efficiently solve it numerically using value function iteration and we document basic properties of the model.
Źródło:
Control and Cybernetics; 2016, 45, 4; 513-523
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concept of unifying the data exchange interface in heterogeneous ITS networks
Autorzy:
Sumila, M.
Powiązania:
https://bibliotekanauki.pl/articles/393649.pdf
Data publikacji:
2014
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
Datex2
NTCIP
heterogeneous network
shared interface
sieć heterogeniczna
wspólny interfejs
Opis:
A concept of unifying the communications interface between heterogeneous ITS subsystems was presented in this paper. In its first part, it concentrates on causes for and consequences of having heterogeneous networks. Then it goes to present methods developed to counteract that phenomenon through the seven layer OSI model and the CORBA standard. In latter parts, two data exchange protocols in heterogeneous ITS networks were presented. In the context of their limitations, an original concept was developed using a shared database as a universal communication interface between different ITS systems.
Źródło:
Archives of Transport System Telematics; 2014, 7, 4; 45-49
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling the Arithmetic Decomposition of DA-LUT Block for Heterogeneous FPGA Structures
Autorzy:
Staworko, M.
Rawski, M.
Powiązania:
https://bibliotekanauki.pl/articles/226414.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
distributed arithmetic
FPGA
FIR filter
heterogeneous programmable structures
Opis:
Distributed arithmetic is well known technique of designing FIR filters in FPGA devices. The quality of such filter implementation strongly depends on synthesis results of the DALUT block. Heterogeneity of modern FPGA structures introduces new possibilities into implementation process, that may lead to better results, but also makes it more complicated. This paper presents the simple mathematical model for estimating the necessary FPGA resources to implement DA-LUT using decomposition-based approach. The model takes into account the type of logic cells or memory blocks used for decomposition process. The proposed model is help ful to determinate the DALUT decomposition strategy for further automation of modified distributed arithmetic decomposition method.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 4; 335-344
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identifying limits of scalability in distributed, heterogeneous, layer based monitoring concepts like SLAte
Autorzy:
Hilbrich, M.
Muller-Pfefferkorn, R.
Powiązania:
https://bibliotekanauki.pl/articles/305401.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
distributed
scalable
slate
heterogeneous
grid
monitoring
Opis:
In this paper we present the concept of a scalable job centric monitoring infrastructure. The overall performance of this distributed, layer based architecture called SLAte can be increased by installing additional servers to adapt to the demands of the monitored resources and users. Another important aspect is to offer a uniform global view on all data which are stored distributed to provide an easy access for users or visualisation tools. Additionally we discus the impact of these uniform access layer on scalability.
Źródło:
Computer Science; 2012, 13 (3); 23-33
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristic of Vertical Reynolds Shear Stress in a Patchy Heterogeneous Open Channel
Autorzy:
Olatunji, Peter Folorunso
Powiązania:
https://bibliotekanauki.pl/articles/1177793.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Reynolds Stress
gravel
heterogeneous
open channel
patchy
turbulence
vegetation
Opis:
In turbulent flow, the Reynolds stress provides an understanding of the shear dispersion within the flow. Turbulence can be said to have an effect equivalent to the Reynolds shear stresses and are indicators of turbulence transport. This paper examined the characteristic of vertical Reynolds Shear stress in a patchy heterogeneous open channel using two experimental conditions for flexible and rigid vegetation interaction with gravel bed. The results show the value of vertical Reynolds stress decreases downstream along the channel section and as the distance from change in roughness increases. This is attributed to the effects of the bed roughness configuration (due to the preceding vegetated bed roughness) on the vertical Reynolds stress distribution. However, the position of maximum vertical Reynolds stress is located near bed over the vegetated zone. This provides an indication that the vegetated bed serves as the primary source of turbulence for the flow.
Źródło:
World Scientific News; 2018, 99; 1-14
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation-based sailboat trajectory optimization using on-board heterogeneous computers
Autorzy:
Dębski, R.
Powiązania:
https://bibliotekanauki.pl/articles/305745.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
black-box optimization
trajectory optimization
dynamic programming
heterogeneous computing
micro HPC platform
Opis:
A dynamic programming-based algorithm adapted to on-board heterogeneous computers for simulation-based trajectory optimization was studied in the context of high-performance sailing. The algorithm can efficiently utilize all OpenCL-capable devices, starting the computation (if necessary, in single precision) on a GPU and finalizing it (if necessary, in double-precision) with the use of a CPU. The serial and parallel versions of the algorithm are presented in detail. Possible extensions of the basic algorithm are also described. The experimental results show that contemporary heterogeneous on-board/mobile computers can be treated as micro HPC platforms. They offer high performance (the OpenCL-capable GPU was found to accelerate the optimization routine 41 fold) while remaining energy and cost efficient. The simulation-based approach has the potential to give very accurate results, as the mathematical model upon which the simulator is based may be as complex as required. The black-box represented performance measure and the use of OpenCL make the presented approach applicable to many trajectory optimization problems.
Źródło:
Computer Science; 2016, 17 (4); 461-481
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Near-surface mass defect in models of locally heterogeneous solid mechanics
Autorzy:
Nahirnyj, Taras
Tchervinka, Kostiantyn
Powiązania:
https://bibliotekanauki.pl/articles/386709.pdf
Data publikacji:
2019
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
locally heterogeneous mechanics
RVE
mass defect
size effects
thin fibres
Opis:
This article deals with the model of the locally heterogeneous elastic body. The model accounts for long-range interaction and describes near-surface non-homogeneity and related size effects. The key systems of model equations are presented. From the viewpoint of the representative volume element, the boundary condition for density and the limits of applicability of the model are discussed. The difference of mass density in the near-surface body region from the reference value (near-surface mass defect) causes a non-zero stressed state. It is indicated on the strong dependence of the surface value of density from the curvature of the surface of thin fibres. The effect of the near-surface mass defect on the stressed state and the size effect of surface stresses have been investigated on an example of a hollow cylinder. Size effect of its strength has been studied as well.
Źródło:
Acta Mechanica et Automatica; 2019, 13, 3; 205-210
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Axiomatization of quasigroups
Autorzy:
Smith, Jonathan
Powiązania:
https://bibliotekanauki.pl/articles/729131.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
quasigroup
heterogeneous algebra
hyperidentity
Opis:
Quasigroups were originally described combinatorially, in terms of existence and uniqueness conditions on the solutions to certain equations. Evans introduced a universal-algebraic characterization, as algebras with three binary operations satisfying four identities. Now, quasigroups are redefined as heterogeneous algebras, satisfying just two conditions respectively known as hypercommutativity and hypercancellativity.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2007, 27, 1
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of heterogeneous nucleation on thermodynamic properties of isotactic polypropylene
Autorzy:
Barczewski, M.
Dobrzyńska-Mizera, M.
Trzeciak, M.
Powiązania:
https://bibliotekanauki.pl/articles/778993.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
isotactic polypropylene
PP
heterogeneous
nucleation
modification
sorbitol
DMTA
DSC
Opis:
In this paper we have investigated the effect of 1,2,3-trideoxy-4,6:5,7-bis-O-[(4-propylphenyl)methylene]-nonitol sorbitol used in varying amounts (0.01 - 1 wt %) on isotactic polypropylene (iPP) matrix. We have used dynamic mechanical thermal analysis (DMTA) and differential scanning calorimetry (DSC) to study glass transition temperatures and crystallinity as a function of the nucleating agent concentration. Isotactic polypropylene samples showed a strong dependency on amount of α nucleating agent used. An increasing content of sorbitol based nucleating agent led to an increase of crystallization temperature upon cooling from the melt at constant rate and a decrease of the glass transition temperatures.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 4; 71-74
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of HM-networks with positive and negative heterogeneous requests for finding memory volume in information systems
Autorzy:
Matalytski, Mikhail
Zajac, Pawel
Kopats, Dmitry
Powiązania:
https://bibliotekanauki.pl/articles/1839809.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
HM-network
information systems
volumes of requests
positive heterogeneous request
negative heterogeneous request
sieć HM
sieć kolejkowa
system informacyjny
pojemność pamięci
Opis:
To determine the memory volume of information systems (IS), it was proposed to use a stochastic model, based on the use of a queueing network with bypasses, known as an HM-network. This model includes the servicing of heterogeneous requests along with their volumes, the ability to change the volume of such requests with their passage of time and the possibility of finding computer viruses in them, and therefore servicing requests can be interrupted at some random time. The expressions were obtained for the expected total values of the volume of requests in IS nodes.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 1; 67-77
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of HM-networks with positive and negative heterogeneous requests for finding memory volume in information systems
Autorzy:
Matalytski, Mikhail
Zajac, Pawel
Kopats, Dmitry
Powiązania:
https://bibliotekanauki.pl/articles/122732.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
HM-network
information systems
volumes of requests
positive heterogeneous request
negative heterogeneous request
sieć HM
sieć kolejkowa
system informacyjny
pojemność pamięci
Opis:
To determine the memory volume of information systems (IS), it was proposed to use a stochastic model, based on the use of a queueing network with bypasses, known as an HM-network. This model includes the servicing of heterogeneous requests along with their volumes, the ability to change the volume of such requests with their passage of time and the possibility of finding computer viruses in them, and therefore servicing requests can be interrupted at some random time. The expressions were obtained for the expected total values of the volume of requests in IS nodes.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 1; 67-77
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heterogeneous Data Integration Architecture-Challenging Integration Issues
Autorzy:
Chromiak, M.
Grabowiecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/106210.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
grid integration model
heterogeneous integration
distributed architecture
data integration
big data
distributed transaction
warehouse
ETL
OLAP
Opis:
As of today, most of the data processing systems have to deal with a large amount of data originated from numerous sources. Data sources almost always differ regarding its purpose of existence. Thus model, data processing engine and technology differ intensely. Due to current trend for systems fusion there is a growing demand for data to be present in a common way regardless of its legacy. Many systems have been devised as a response to such integration needs. However, the present data integration systems mostly are dedicated solutions that bring constraints and issues when considered in general. In this paper we will focus on the present solutions for data integration, their flaws originating from their architecture or design concepts and present an abstract and general approach that could be introduced as an response to existing issues. The system integration is considered out of scope for this paper, we will focus particularly on efficient data integration.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2015, 15, 1; 7-11
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of quality of heterogeneous mechanical systems using impedance method
Autorzy:
Volkovas, V.
Gulbinas, R.
Slavickas, E. S.
Powiązania:
https://bibliotekanauki.pl/articles/329300.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diagnostyka
jakość
impedancja
metoda
heterogeneous mechanical system
quality
impedance
diagnostics
Opis:
The paper analyzes methodology for investigation of dynamic characteristics of heterogeneous systems: honeycomb optical tables and pipelines with sediments, applying mechanical impedance. The developed methodology may be used to assess the quality of plate or cylindrical heterogeneous structures, according to the dynamic characteristics and parameters established in the methodology. It was shown that impedance characteristics are informative to determine some parameters of the quality of honeycomb optical tables and are correlated with the thickness of the pipe's inner sediment layer. Therefore it is possible to choose typical resonance frequencies and according to their changes, the decision about inner layer presence and its value can be made.
Źródło:
Diagnostyka; 2008, 3(47); 83-88
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear system identification using heterogeneous multiple models
Autorzy:
Orjuela, R.
Marx, B.
Ragot, J.
Maquin, D.
Powiązania:
https://bibliotekanauki.pl/articles/330794.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
nonlinear system identification
multiple model
heterogeneous submodel
układ nieliniowy
model wielokrotny
podmodel heterogeniczny
Opis:
Multiple models are recognised by their abilities to accurately describe nonlinear dynamic behaviours of a wide variety of nonlinear systems with a tractable model in control engineering problems. Multiple models are built by the interpolation of a set of submodels according to a particular aggregation mechanism, with the heterogeneous multiple model being of particular interest. This multiple model is characterized by the use of heterogeneous submodels in the sense that their state spaces are not the same and consequently they can be of various dimensions. Thanks to this feature, the complexity of the submodels can be well adapted to that of the nonlinear system introducing flexibility and generality in the modelling stage. This paper deals with off-line identification of nonlinear systems based on heterogeneous multiple models. Three optimisation criteria (global, local and combined) are investigated to obtain the submodel parameters according to the expected modelling performances. Particular attention is paid to the potential problems encountered in the identification procedure with a special focus on an undesirable phenomenon called the no output tracking effect. The origin of this difficulty is explained and an effective solution is suggested to overcome this problem in the identification task. The abilities of the model are finally illustrated via relevant identification examples showing the effectiveness of the proposed methods.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2013, 23, 1; 103-115
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distillation profiles in ternary heterogeneous mixtures with distillation boundaries: staged columns
Autorzy:
Królikowski, A.R.
Powiązania:
https://bibliotekanauki.pl/articles/185501.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mieszaniny heterogeniczne
granice destylacji
destylacja
heterogeneous mixtures
distillation
distillation boundaries
distillation profiles
staged column
Opis:
Distillation boundaries originate from saddle azeotropes, dividing the composition space into distillation regions. In heterogeneous mixtures distilled in packed columns, distillation regions overlap. The common area of distillation regions is parametrically sensitive, and it determines the possibilities of crossing (at a finite reflux) the distillation boundaries defined for a total reflux or reboil ratio. This work is an extended research of the paper (Krolikowski et al., 2011) conducted to scrutinize whether the distillation regions overlapped in heteroazeotropic systems distilled in staged columns. Presented studies were performed by finding such composition points of the products, for which the rectifying profiles of staged columns were ended in different distillation regions. Calculations were executed for the heterogeneous mixture classified under Serafimov's topological class as 3.1-2: ethanol - benzene - water. Distillation regions for staged columns were found to overlap each other in the heterogeneous systems. As a result, their common part was parametrically sensitive.
Źródło:
Chemical and Process Engineering; 2012, 33, 2; 207-219
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Evaluation of a Zone-based Three-level Heterogeneous Clustering Protocol for WSNs
Autorzy:
Rao, Sanapala Shanmukha
Shilpi
Kumar, Arvind
Powiązania:
https://bibliotekanauki.pl/articles/24200745.pdf
Data publikacji:
2023
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
clustering
heterogeneous
network lifetime
stability period
zone-based WSN
Opis:
This paper proposes a zone-based three-level heterogeneous clustering protocol (ZB-TLHCP) for heterogeneous WSNs. In ZB-TLHCP, the sensor field/region is divided into zones where super, advance, and normal nodes are deployed uniformly and randomly. The performance of the proposed ZB-TLHCP system is compared with that of zonal-stable election protocol (Z-SEP), distributed energy efficient clustering (DEEC), and threshold-based DEEC (TDEEC) protocol by varying the number of super and advance nodes, their energy levels for the fixed sensor field, and the total number of nodes. Matlab simulation results revealed that the proposed ZB-TLHCP solution performed better than Z-SEP, DEEC, and TDEEC protocols, as it increased the instability period, prolonged the network's lifetime, and achieved higher throughput values.
Źródło:
Journal of Telecommunications and Information Technology; 2023, 3; 85--93
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Styrene epoxidation over heterogeneous manganese (III) complexes
Autorzy:
Kuźniarska-Biernacka, I.
Lisinska-Czekaj, A.
Czekaj, D.
Alves, M. J.
Fonseca, A. M.
Neves, I. C.
Powiązania:
https://bibliotekanauki.pl/articles/958207.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
styrene epoxidation
heterogeneous manganes
Opis:
The manganes (III) complex functionalised with 2,3-dihydropyridazine has been encapsulated in the supercages of the NaY zeolite using two different procedures, flexible ligand and in situ complex. The parent zeolite and the encapsulated manganese (LTI) complexes were screened as catalysts for styrene oxidation by using t-BOOH as the oxygen source in acetonitrile. Under the optimized conditions, the catalysts exhibited moderate activity with high selectivity to benzaldehyde.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1477-1482
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of annular plates stability with functionally graded structure interacting with elastic heterogeneous subsoil
Autorzy:
Perliński, W
Gajdzicki, M.
Michalak, B.
Powiązania:
https://bibliotekanauki.pl/articles/281491.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
functionally graded materials
stability
annular thin plates
heterogeneous subsoil
Opis:
This contribution deals with the modelling and analysis of stability problems for thin composite annular plates interacting with elastic heterogeneous subsoil. The object of analysis is an annular plate with a deterministic heterogeneous microstructure and the apparent properties smoothly varying along a radial direction. The aim of contribution is to formulate two macroscopic mathematical models describing stability of this plate. The considerations are based on a tolerance averaging technique. The general results are applied to the analysis of some special stability problems. The obtained results of critical forces with those obtained from finite element method are compared.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 2; 485-498
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 294

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