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Tytuł:
Selected problem of structure optimization for Artificial Neural Networks with forward connections
Autorzy:
Płaczek, S.
Powiązania:
https://bibliotekanauki.pl/articles/376117.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
artificial neural network
network structure
structure optimization
Opis:
The problem of Artificial Neural Network (ANN) structure optimization related to the definition of optimal number of hidden layers and distribution of neurons between layers depending on selected optimization criterion and inflicted constrains. The article presents the resolution of the optimization problem. The function describing the number of subspaces is given, and the minimum number of layers as well as the distribution of neurons between layers shall be found.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2014, 80; 191-197
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Importance of Logistics in Creating Entrepreneurial Network Structures
Autorzy:
Wiśniewska-Sałek, Anna
Powiązania:
https://bibliotekanauki.pl/articles/504068.pdf
Data publikacji:
2014
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
network structure
supply chain
logistics centers
entrepreneurship
Opis:
Building entrepreneurial companies is associated with taking actions to enable their general development, leading to application of innovative solutions, both in technology and management. Modern economy and pervasive crisis force entrepreneurs to search for alternative means for supporting the progress in order to be able to fight for customers against ‘foreign countries of cheaper production’ and, at the same time, to not being forced to use "drastic" methods of reducing production costs. This paper presents the already existing solutions that are not fully used in Polish reality, which are the network structures (clusters) that have beneficial economic impact and build integrated supply chains. The author is taking a theoretical attempt to connect concept of supply chains and clusters. Consolidation will relieve the individual companies and thereby will create opportunities to take new - common – actions, which together will create entrepreneurial network structure and bring individual benefits.
Źródło:
Logistics and Transport; 2014, 21, 1; 33-40
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transformation of the Network Model with Complete Information of the Network Structure into a Network Model with Incomplete Information of the Network Structure : A Game Theory Approach
Transformacja modelu z pełną informacją o sieci użytkowników do modelu z niekompletną informacją : podejście wykorzystujące narzędzia teorii gier
Autorzy:
Misztak, A.
Powiązania:
https://bibliotekanauki.pl/articles/305929.pdf
Data publikacji:
2011
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
formowanie sieci
równowaga Nasha
struktura sieci
informacja o strukturze sieci
network formation
Nash equilibrium
information of network structure
network structure
Opis:
In this paper we consider the formation of directed networks, i.e. networks represented by directed graphs. By information (a rather common use of this term) we mean good information that flows in the network. Each member of the network is endowed with some amount of resources and has also a payoff function, which depends positively on the amount of information he has access to. Knowing the network structure players can gain access to the information possessed by others by creating links. The problem is to specify which network structures can be a strategic equilibrium and whether they are optimal (effective) [3], [2]. Further on we introduced a model in which players do not have a complete knowledge of the network structure, but only a part of it. Decisions they make base on incomplete information. The problem is to define the equilibrium and to find out what strategies can lead to the equilibrium.
W tym artykule zajmiemy się modelowaniem sieci skierowanych, to znaczy przedstawionych za pomocą grafów skierowanych. Przez "informację" (w raczej ogólnym użyciu tego słowa) będziemy rozumieć dobro, którego przepływ następuje w sieci. Każdy uczestnik jest obdarzony pewnym zasobem, ale posiada również funkcję wypłaty, która wprost zależy od ilości informacji, do których dany uczestnik ma dostęp. Znając strukturę sieci gracze przez ustanowienie połączeń do innych uczestników uzyskują dostęp do posiadanej przez nich informacji. Problem polega na określeniu, jakie konfiguracje połączeń mogą prowadzić do równowagi oraz czy takie konfiguracje są optymalne (efektywne) [3], [2]. W dalszej części wprowadzamy model, w którym gracze nie posiadają wiedzy na temat struktury całej sieci a jedynie pewnego fragmentu. Decyzje podejmowane są na podstawie cząstkowej (niekompletnej) informacji. Podstawowym problemem jest zdefiniowanie równowagi w takim modelu a następnie zbadanie, jakie postępowanie prowadzi do równowagi.
Źródło:
Biuletyn Instytutu Systemów Informatycznych; 2011, 7; 25-29
1508-4183
Pojawia się w:
Biuletyn Instytutu Systemów Informatycznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topology of Complex Networks and Demand of Intraday Liquidity: Based on the Real-Time Gross Settlement System
Autorzy:
Tong, Mu
He, Yi
Powiązania:
https://bibliotekanauki.pl/articles/1357655.pdf
Data publikacji:
2018-03-21
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
Tematy:
network structure
intraday liquidity
real-time settlement
liquidity management
Opis:
Based on the payments and settlement system, the influence of the topology of capital flow networks on the extra short-term liquidity demand is investigated. Through modelling the circulating mechanism of liquidity in a network, its different influencing factors are analysed. The factors relating to the strength of nodes and leakage of liquidity that influences the liquidity demands of real-time settlements are studied from the perspective of both the system and members, using different simulation methods. The results show that strength will lead the member’s liquidity demand to increase but the strength distribution will lead the system’s liquidity demand to decrease, in cases with no leakage effect or unchanged leakage effect. The liquidity demand of the entire system is positive compared to the amount of leakage effect but uncorrelated to the distribution of the leakage effect among members, if the effect of strength distribution is unchanged. If the effects of strength, strength distribution and leakage are changed together, the latter is the dominant factor that influences the liquidity demand of both system and members. The above findings are useful for the management and supervision of short-term liquidity demand in complex financial systems, and for liquidity risk management and liquidity rescue policymaking.
Źródło:
Central European Economic Journal; 2017, 2, 49; 50 - 61
2543-6821
Pojawia się w:
Central European Economic Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
It Matters Whom You Know: Mapping the Links Between Social Capital, Trust and Willingness to Cooperate
Autorzy:
Growiec, Katarzyna
Growiec, Jakub
Kamiński, Bogumił
Powiązania:
https://bibliotekanauki.pl/articles/2131855.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
social capital
social network structure
social trust
willingness to cooperate
Opis:
Trust and willingness to cooperate depend on the structure of one’s social network and the resources one can access through it. In this study, based on a survey dataset of a representative sample of the Polish population (n = 1000) we create an empirical ‘map’ of four distinct dimensions of social capital: degree (number of social ties), centrality in the social network, bridging social capital (ties with dissimilar others), and bonding social capital (ties with similar others, primarily with kin). We investigate the links between social capital and its key correlates: generalized and particularized trust and willingness to cooperate. We find that centrality (or occupying the position of a network bridge) is positively related to trust, whereas for bonding social capital this relation is negative. We find also a puzzling effect of cooperation without trust in the case of individuals with high bridging social capital resources (ties with dissimilar others).
Źródło:
Studia Socjologiczne; 2022, 2; 59-83
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of urban MV multi-loop electric power distribution networks structure using Artificial Intelligence methods
Autorzy:
Parol, M.
Baczyński, D.
Brożek, J.
Powiązania:
https://bibliotekanauki.pl/articles/205678.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
electric power distribution networks
optimization of network structure
evolutionary algorithms
artificial neural networks
Opis:
Urban medium voltage (MV) electric power distribution networks are supplied with primary (HV/MV) substations. These networks supply secondary (MV/LV) transformer substations and are often built as closed structures - loop arrangements. The design problem of optimal urban MV distribution network structure consists of determining the number of primary substations, establishing the number of MV loops supplied with the primary substations, and assigning the secondary MV/LV transformer substations to the MV loops. The optimization task becomes especially complex when the number of the primary substations is greater than one. The minimum of total annual costs is sought. The total annual costs include: fixed (investment) costs, variable (operating) costs and supply-interruption costs. Typical constraints are also accounted for. The so defined optimization problem is a complicated mathematical problem in respect of computational effort. In order to resolve the mathematical model of the optimization problem, evolutionary algorithms and artificial neural networks have been used. Exemplary computational experiments have been executed on the model of urban MV multi-loop electric power distribution networks. The results from the evolutionary algorithm and the artificial neural network calculations have been compared.
Źródło:
Control and Cybernetics; 2012, 41, 3; 667-689
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy cluster – an attempt in characterisation and definition
Klaster energii - próba charakterystyki i definicji
Autorzy:
Gronkowska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2029282.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
energy cluster
network structure
cooperation
business alliance
klaster energii
struktura sieciowa
kooperacja
alians biznesowy
Opis:
Clusters are an organisational and economic phenomenon. This paper attempts to answer what an energy cluster actually is and whether it meets the requirements of a cluster in the classical approach of economic sciences. The Act of 20 February 2015 on renewable energy sources (Ustawa OZE 2015) introduced the concept of an ‘energy cluster’. It was aimed at, among others, increasing energy security and environmental protection through an efficient use of renewable energy sources. In the literature on the subject, there is no single universally applicable definition of a cluster, it can only be considered in its various aspects. The concept of a cluster has so many applications, associations and meanings that in many respects it has become a ‘chaotic idea’ due to flattening and equalising different types, processes and spatial scales of economic location within one universal concept. However, the main doubt concerns the very definition of a cluster. The paper considers the organisational attributes of clusters, based on the analysis of the following aspects: a) Cluster in historical terms. Overview of cluster and network definitions: i. Overview of cluster definitions ii. Overview of network structure definitions b) Energy cluster. Forms of interorganisational relations and the typology of energy clusters i. Forms of interorganisational relations in an energy cluster ii. Energy cluster against in relation to organisational network typology iii. Energy cluster as a form of company network – common features and differences c) An attempt in characterisation and definition of an energy cluster
Klastry są organizacyjnym i gospodarczym fenomenem. W niniejszym artykule podjęto próbę odpowiedzi na pytanie czym właściwie jest klaster energii i czy spełnia on wymogi klastra w klasycznym ujęciu nauk ekonomicznych. Ustawą z dnia 20 lutego 2015 r. o odnawialnych źródłach energii (Ustawa OZE, 2015) wprowadzono pojęcie „klastra energii”. Jej celem jest m.in. zwiększenie bezpieczeństwa energetycznego i ochrony środowiska, poprzez efektywne wykorzystanie odnawialnych źródeł energii. W literaturze przedmiotu nie istnieje jedna powszechnie obowiązująca definicja klastra, rozpatrywane są tylko różne jego aspekty. Koncepcja klastra uzyskała tak wiele zastosowań, skojarzeń i znaczeń, że pod wieloma względami stałą się „chaotyczną ideą” w sensie spłaszczenia i zrównania różnych rodzajów, procesów i przestrzennej skali lokalizacji gospodarczej w ramach jednej uniwersalnej koncepcji, natomiast głównym źródłem wątpliwości jest sama definicja klastra. W artykule rozważane są atrybuty organizacyjne klastrów, w oparciu o przeprowadzoną analizę następujących aspektów: a. Klaster w ujęciu historycznym. Przegląd definicji klastra i sieci: i. Przegląd definicji klastrów ii. Przegląd definicji struktury sieciowej b. Klaster energii. Formy relacji międzyorganizacyjnych oraz jego typologia i. Formy relacji międzyorganizacyjnych w klastrze energii ii. Klaster energii na tle typologii sieci organizacyjnych iii. Klaster energii jako forma sieci firm – cechy wspólne i różnice c. Próba charakterystyki i definicji klastra energii.
Źródło:
Geomatics, Landmanagement and Landscape; 2021, 3; 93-122
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical Properties of HTPE/Bu-NENA Binder and the Kinetics of Bu-NENA Evaporation
Autorzy:
Yuan, Shen
Luo, Yunjun
Powiązania:
https://bibliotekanauki.pl/articles/358657.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
hydroxyl-terminated polyether
HTPE
N-butyl-N-(2-nitroxyethyl)nitramine
BuNENA
mechanical properties
cross-linking network structure
evaporation
Opis:
The correlation between the mechanical properties of hydroxyl-terminated polyether (HTPE)/N-butyl-N-(2-nitroxyethyl)nitramine (Bu-NENA) binders with different plasticization ratios (pl/po), varied from 0.9 to 1.5, have been studied. The very early stage of evaporation of Bu-NENA from the HTPE/Bu-NENA binder, with a pl/po ratio of 1.2, has been investigated. The results revealed that the pl/po ratio has strong influences on the mechanical properties. When the pl/po ratio was 1.2, the mechanical properties of the HTPE/Bu-NENA binder were satisfactory, the maximum tensile strength and the elongation at break being 2.39 MPa and 93.27%, respectively. The evaporation rate constant of Bu-NENA from HTPE/Bu-NENA binder with a pl/po ratio of 1.2 increased from 0.31·10–5 to 2.32·10–5 s–1 as the temperature was increased from 50 to 90 °C. The value of the activation energy of evaporation was 51.47 kJ/mol and its pre-exponential factor was 6.14·102 s–1.
Źródło:
Central European Journal of Energetic Materials; 2020, 17, 1; 119-141
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strategic management in conditions of uncertainty
Autorzy:
Dźwigoł, Henryk
Dźwigoł-Barosz, Mariola
Powiązania:
https://bibliotekanauki.pl/articles/27313439.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
strategic management
knowledge economy
sustainability
network structure
emotional intelligence
zarządzanie strategiczne
gospodarka oparta na wiedzy
zrównoważony rozwój
struktura sieci
inteligencja emocjonalna
Opis:
Purpose: to analyse the variables influencing the construction of a new approach in the strategic management process of an enterprise operating under uncertainty. As a theoretical background for the research, the 'valued' concepts related to business management occurring in the global economy were used, i.e. the concepts of knowledge economy, network organisation, sustainable development, time management and social participation. Design/methodology/approach: it is necessary to use methods in practice for research in management science based on observation of facts and the classification used in the methodology of inductive sciences such as: • observation carried out under natural conditions and interaction with the companies under investigation, • observation-intervention which takes place within the framework of transformation activities in companies, and the researcher has a direct influence on the decisions made in this respect. This implies the need to combine scientific and practical objectives. Findings: The market has forced a move away from the traditional business management approach to task-focused teams, where today's boss may be his subordinate's subordinate tomorrow, because that is better for the objectives of a particular project. These groups will be interdisciplinary, according to the nature of the task, and their participants will gain a pretty good knowledge of what the other partners are up to and will be prepared enough to replace them with dignity in forced situations. This approach offers an opportunity for the company to adapt more quickly to dynamic changes in the environment. Research limitations/implications: The research should address the development of a tool to support the selection of methods and approaches for the strategic management process under uncertainty. Practical implications: The authors have identified only some of the determinants of strategic management under uncertainty, such as the knowledge economy, sustainable development, network structure in the enterprise, time management, soft factors in the management process under uncertainty - emotional intelligence. The research should not only develop new approaches in the process of strategic management, but also identify management methods that should primarily be applied under conditions of uncertainty. Originality/value: In the conditions of pandemics and wars, it is necessary to develop a flexible approach to the process of strategic corporate management. It is also necessary to develop or modify existing management methods for these difficult times of dynamic change in the environment.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2023, 168; 119--131
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural network structure optimization algorithm
Autorzy:
Nowakowski, G.
Dorogyy, Y.
Doroga-Ivaniuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/385236.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
structure optimization
neural network
ReLU
SGD
Opis:
This paper presents a deep analysis of literature on the problems of optimization of parameters and structure of the neural networks and the basic disadvantages that are present in the observed algorithms and methods. As a result, there is suggested a new algorithm for neural network structure optimization, which is free of the major shortcomings of other algorithms. The paper describes a detailed description of the algorithm, its implementation and application for recognition problems.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 1; 5-13
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of hierarchical structure and spatial pattern of coastal cities in China – based on the data of distribution of marine-related enterprises
Autorzy:
Wang, L.
Xiao, W.
Wang, C.
Powiązania:
https://bibliotekanauki.pl/articles/258846.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
hierarchical structure
spatial pattern
city network
Opis:
In this paper, a comprehensive research of the evolution of the hierarchical structure and spatial pattern of coastal cities in China was conducted based on the data of distribution of the headquarters and subsidiaries of marine-related enterprises in 1995, 2005 and 2015 using the city network research method proposed by Taylor. The results of the empirical research showed: China’s coastal city network had an obvious hierarchical characteristics of “national coastal cityregional coastal city-sub-regional coastal city-local coastal city”, in the 20 years of development process, the hierarchies of coastal cities in China showed a hierarchical progressive evolution; in past 20 years, the spatial pattern and network structure of coastal cities in China tended to be complete, and the city network was more uniform, forming a “three tiers and three urban agglomerations” network structure; the strength of connection among the cities was obviously strengthened, and the efficiency of urban spatial connection was improved overall.
Źródło:
Polish Maritime Research; 2017, S 3; 58-64
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Money as a network good
Autorzy:
Włodarczyk, Julita
Powiązania:
https://bibliotekanauki.pl/articles/522136.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Monetary integration
Money
Network effects
Structure
Opis:
Many economic phenomena, including flows of money, can be treated as manifestations of operation of specific networks. In contrast to the popularity of analyses of network structure and dynamics in sociology and physics, economic investigations concerning network approach in general and network properties of money in particular have not been popular until recently. This paper presents the concept of money as a network good and its features (complementarity, standardization, consumption externalities, switching costs, lock-in, dependence on social preferences and expectations and economies of scale in production). It is asserted that network theory of money may shed new light on such processes as monetary integration.
Źródło:
Journal of Economics and Management; 2015, 20; 53-63
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simulation model of seawater vertical temperature by using back-propagation neural network
Autorzy:
Zhao, N.
Han, Z.
Powiązania:
https://bibliotekanauki.pl/articles/259762.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
neural network
Agro data
vertical structure
surface temperature
Opis:
This study proposed a neural-network-based model to estimate the ocean vertical water temperature from the surface temperature in the northwest Pacific Ocean. The performance of the model and the sources of errors were assessed using the Gridded Argo dataset including 576 stations with 26 vertical levels from surface (0 m)–2,000 m over the period of 2007–2009. The parameter selection, model building, stability of the neural network were also investigated. According to the results, the averaged root mean square error (RMSE) of estimated temperature was 0.7378 °C and the correlation coefficient R was 0.9967. More than 67% of the estimates from the four selected months (January, April, July and October) lay within ± 0.5 °C. When counting with errors lower than ± 1°C, the lowest percentage was 83%.
Źródło:
Polish Maritime Research; 2015, S 1; 82-88
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A selected problem of the structure optimization and decomposition of the artificial neural network with cross-forward connections
Autorzy:
Płaczek, S.
Powiązania:
https://bibliotekanauki.pl/articles/97313.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
artificial neural network
structure optimization
decomposition
coordination
cross connection
Opis:
The problem of an Artificial Neural Network (ANN) structure optimization is related to the definition of the optimal number of hidden layers and the distribution of neurons between layers depending on a selected optimization criterion and inflicted constrains. Using a hierarchical structure is an accepted default way of defining an ANN structure. The following article presents the resolution of the optimization problem. The function describing the number of subspaces is given, and the minimum number of layers, as well as the distribution of neurons between layers, shall be found. The structure can be described using different methods, mathematical tools, and software or/and technical implementation. The ANN decomposition into hidden and output layers - the first step to build a two-level learning algorithm for cross-forward connections structure - is described, too.
Źródło:
Computer Applications in Electrical Engineering; 2014, 12; 597-608
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Network analysis of the intra-EU trade
Autorzy:
Modrzejewska, Anita
Biskup, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/31340020.pdf
Data publikacji:
2023-11-30
Wydawca:
Główny Urząd Statystyczny
Tematy:
network analysis
international trade
European integration
core-periphery structure
Opis:
The research presented in the paper used tools offered by network analysis and the graph theory. The study examined the empirical properties of the intra-EU trade network in the years 1999–2019 and confirmed that the EU trade links were of a disassortative nature. The use of network indicators has proven that the European trade network was characterised by a coreperiphery structure. The study shows that Germany was the undisputed leader of the EU trade network over the studied years, although its central position was weakening over the years.
Źródło:
Przegląd Statystyczny; 2023, 70, 2; 1-19
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
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