Temat: network efficiency - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Regional geographies of land transport networks in the Pearl River Delta mega-region, China: A longitudinal analysis
Autorzy:: Gao, X.
Li, T.
Powiązania:: https://bibliotekanauki.pl/articles/2140889.pdf
Data publikacji:: 2018
Wydawca:: Fundacja Centrum Badań Socjologicznych
Tematy:: transport network
network efficiency
spatiotemporal evolution
Pearl River Delta
PRD
Opis:: This paper uses network-based efficiency measures to evaluate the efficiency implications of the evolution of the transport network in the Pearl River Delta (PRD) over the period 1988-2008. The network-based efficiency measures consider the relative ease of access between cities in terms of weighted relative travel cost. The results indicate that the spatial patterns of network efficiency are different from ‘core-periphery’ pattern derived from classical accessibility indicators. This implies that there are low network efficiency cities and high network efficiency cities in core and peripheral regions at the same time. In the first stage (1988-1998), the efficiency contour shows a ‘corridor’ pattern along the GuangShen traffic corridor between Guangzhou and Shenzhen in the eastern side of the Pearl estuary; in the following decade (1998-2008), with large-scale infrastructural developments, the spatial pattern has changed from a north-south corridor to an east-west contiguous distribution pattern. By 2008, the mean network efficiency value indicates that the efficiency levels within the PRD as a whole are tending towards optimal levels. We conclude by suggesting ways to promote the urban economic development based on the relationship between the network efficiency and per capita GDP.
Źródło:: Journal of Sustainable Development of Transport and Logistics; 2018, 3, 1; 37-52
2520-2979
Pojawia się w:: Journal of Sustainable Development of Transport and Logistics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Efficiency as an assessment measure of warehouse facilities location in logistics network
Autorzy:: Jacyna-Gołda, I.
Żak, J.
Wasiak, M.
Powiązania:: https://bibliotekanauki.pl/articles/247767.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: efficiency
logistics network
location
Opis:: The paper presents an approach to the assessment of the location of facilities in the warehouse logistics network with the efficiency of its operations. Determination of efficiency of complex systems of this type should take into account wide range of issues. The system efficiency results on the one hand from the efficiency of its action and on the other hand from the ability to use available system elements to achieve the objectives. Efficiency is a main criterion to the evaluation of the activity both at the level of the whole system, as well as in its subsystems or components. Most often, it refers to the principle of rational management formulated in two variants: performance (maximization effect) and economical (minimizing effort). The article poses the thesis that based on studies of speed and reliability of execution of tasks it is possible to assess the potential locations of warehouse facilities in the studied logistics network. Were also presented factors affecting the efficiency of the functioning of individual cells of the logistics network. Was pointed to the technical, economic, organizational and reliability aspects affecting the efficiency and reliability of the logistics network in terms of both supply and distribution. It was also presented a modular block diagram of an assessment method for localizing logistics facilities in the logistics network.
Źródło:: Journal of KONES; 2015, 22, 3; 59-66
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: AN EXAMPLE OF NETWORK DEA – ASSESSMENT OF OPERATING EFFICIENCY OF UNIVERSITIES
Autorzy:: Chodakowska, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/452995.pdf
Data publikacji:: 2015
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:: DEA
network DEA
efficiency
universities
Opis:: The purpose of the article is to present the use of network DEA for evaluating the efficiency of Polish universities. Network DEA assessment of operating efficiency of universities was compared with the single stage DEA results that focus on teaching efficiency, research efficiency and aggregate performance. The study presented in the paper – though limited in scope – shows that biggest Polish universities are diversified in regard to the efficiency of their performance.
Źródło:: Metody Ilościowe w Badaniach Ekonomicznych; 2015, 16, 1; 75-84
2082-792X
Pojawia się w:: Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: EEULA: an energy-aware event-driven unicast algorithm for wireless sensor network by learning automata
Autorzy:: Kashani, A. A. S.
Noori, A. M. M.
Powiązania:: https://bibliotekanauki.pl/articles/102180.pdf
Data publikacji:: 2016
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: network lifetime
wireless sensor network
learning automata
energy efficiency algorithm
Opis:: Energy consumption is one of the major challenges in wireless sensor networks, thus necessitating an approach for its minimization and for load balancing data. The network lifetime ends with the death of one of its nodes, which, in turn, causes energy depletion in and partition of the network. Furthermore, the total energy consumption of nodes depends on their location; that is, because of the loaded data, energy discharge in the nodes close to the base station occurs faster than other nodes, the model presented here, through using learning automata, selects the path appropriate for data transferring; the selected path is rewarded or penalized taking the reaction of surrounding paths into account. We have used learning automata for energy management in finding the path; the routing protocol was simulated by NS2 simulator; the lifetime, energy consumption and balance in an event-driven network in our proposed method were compared with other algorithms.
Źródło:: Advances in Science and Technology. Research Journal; 2016, 10, 30; 9-18
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analysis of Coverage and Area Spectral Efficiency under Various Design Parameters of Heterogeneous Cellular Network
Autorzy:: Abbasi, Anum
Shaikh, M. Mujtaba
Dahri, Safia
Soomro, Sarfraz Ahmed
Panhwar, Fozia Aijaz
Powiązania:: https://bibliotekanauki.pl/articles/2055224.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heterogeneous network
coverage
area spectral efficiency
5G
ultra-dense network
Opis:: As day by day the population is increasing, the use of mobile phones and different applications is increasing which requires high data rate for transmission. Homogeneous cellular network cannot fulfill the demand of mobile users, so creating a heterogeneous cellular network (HCN) is a better choice for higher coverage and capacity to fulfil the increasing demand of upcoming 5G and ultra-dense cellular networks. In this research, the impact of antenna heights and gains under varying pico to macro base stations density ratio from 2G to 5G and beyond on two-tier heterogeneous cellular network has been analyzed for obtaining optimum results of coverage and area spectral efficiency. Furthermore, how the association of UEs affects the coverage and ASE while changing the BSs antenna heights and gains has been explored for the two-tier HCN network model. The simulation results show that by considering the maximum macro BS antenna height, pico BS antenna height equal to user equipment (UE) antenna height and unity gains for both macro and pico tiers, the optimum coverage and area spectral efficiency (ASE) for a two-tier fully loaded heterogeneous cellular network can be obtained.
Źródło:: International Journal of Electronics and Telecommunications; 2021, 67, 4; 639--645
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Prediction of adsorption efficiencies of Ni (II) in aqueous solutions with perlite via artificial neural networks
Autorzy:: Turp, S. M.
Powiązania:: https://bibliotekanauki.pl/articles/204724.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: wastewater
treatment efficiency
adsorption
perlite
artificial neural network
Opis:: This study investigates the estimated adsorption efficiency of artificial Nickel (II) ions with perlite in an aqueous solution using artificial neural networks, based on 140 experimental data sets. Prediction using artificial neural networks is performed by enhancing the adsorption efficiency with the use of Nickel (II) ions, with the initial concentrations ranging from 0.1 mg/L to 10 mg/L, the adsorbent dosage ranging from 0.1 mg to 2 mg, and the varying time of effect ranging from 5 to 30 mins. This study presents an artificial neural network that predicts the adsorption efficiency of Nickel (II) ions with perlite. The best algorithm is determined as a quasi-Newton back-propagation algorithm. The performance of the artificial neural network is determined by coefficient determination (R²), and its architecture is 3-12-1. The prediction shows that there is an outstanding relationship between the experimental data and the predicted values.
Źródło:: Archives of Environmental Protection; 2017, 43, 4; 26-32
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Coherence of Cluster on Efficiency of Logistic Process
Autorzy:: Staszewska, Jolanta
Powiązania:: https://bibliotekanauki.pl/articles/504489.pdf
Data publikacji:: 2012
Wydawca:: Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:: cluster processes
efficiency
logistic process
logistic network operation
Opis:: The clustering process is innovation for the polish market. The process concern various market sectors. The logistic clusters and logistic of clusters give minimilization of expenses and quick turn of expenditure. The cluster is form of network and his efficacy is very important for logistic. The logistic network give new possibility for cluster and cluster give new possibility for network logistic, too. The efficacy is necessary for various level logistic process. Material fatigue of parts of different technical systems belongs to the most frequent causes of boundary states rise and relating operation breakdowns. The objective of the article is general formulation of reliability of technical systems judging, brief characteristic of basic areas to be taken into account as input into calculated prediction of technical systems fatigue life and analysis of risk items by its practical application. An extraordinary attention is dedicated to the evaluation of fatigue life of structures parts of different technical systems and means in objects of critical infrastructure all over the world because breakdowns caused by a fatigue failure have often a nature of catastrophe.
Źródło:: Logistics and Transport; 2012, 14, 1; 25-30
1734-2015
Pojawia się w:: Logistics and Transport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Sieć społeczna jako potencjał przedsiębiorcy determinujący efektywność firmy
Autorzy:: Tomski, P.
Powiązania:: https://bibliotekanauki.pl/articles/114947.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:: sieć społeczna
sieć osobista
kontakty
komunikacja
przedsiębiorczość
efektywność
wzrost
rozwój
social network
personal network
relations
communication
entrepreneurship
efficiency
company efficiency
Opis:: Celem niniejszego rozdziału jest prezentacja znaczenia potencjału przedsiębiorcy, który wynika z potencjału sieci osobistych stanowiących jednocześnie czynnik determinujący wielowymiarowo postrzeganą efektywność przedsiębiorstwa.
Źródło:: Zeszyty Naukowe. Quality. Production. Improvement; 2017, 2 (7); 81-93
2544-2813
Pojawia się w:: Zeszyty Naukowe. Quality. Production. Improvement
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Assessment method of end-of-life vehicles recycling network efficiency
Autorzy:: Merkisz-Guranowska, A.
Powiązania:: https://bibliotekanauki.pl/articles/246210.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: recycling network
end-of-life vehicles
system efficiency
indicators
Opis:: Recycling is a final stage closing the life cycle of vehicles. The quality of this process affects the combined impact of automobiles on the environment. Recycling networks differ in the level of efficiency due to the differences in how the recycling system is organized, their environment, and the characteristics of the entities taking part in recycling process. The article presents an algorithm of a method for assessing the effectiveness of a vehicle-recycling network, which can be used in a comparative analysis of networks, or for evaluating changes over time. A set of indicators relating to the technical, economic, environmental, and social aspects was proposed. The article presents the variety of aspects involved in assessing, the efficiency of a vehicle-recycling network the best solution seems to be the inclusion of selected indicators for the assessment model, which will also act as a tool to assess the state of the network and conduct rankings of available solutions. The model for assessing the efficiency has to be preceded by determining the purpose and scope of the assessment and analysis of available evaluation tools.
Źródło:: Journal of KONES; 2017, 24, 4; 193-201
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Ocena niezawodności sieci komunikacyjnych
Estimation reliability of road net
Autorzy:: Pilch, R.
Szybka, J.
Powiązania:: https://bibliotekanauki.pl/articles/256577.pdf
Data publikacji:: 2009
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: niezawodność
sieć transportowa
algorytm faktoryzacji
redukcja sieci
efektywność
network reliability
transport network
factoring algorithm
network reduction
efficiency
Opis:: W artykule przedstawiono sposób wyznaczania niezawodności sieci transportowych na terenach aglomeracji miejskich. Jedną z metod obliczeniowych stosowaną do wyznaczania niezawodności układów sieciowych jest algorytm faktoryzacji zmodyfikowany pod kątem specyfiki sieci komunikacji samochodowej. Opracowana metoda może być wykorzystana w analizie wpływu niezawodności skrzyżowań, dodatkowych połączeń drogowych, jak również obwodnic miasta na niezawodność całej sieci komunikacyjnej. Analizowany problem został zilustrowany na praktycznym przykładzie obliczeń niezawodności rzeczywistej sieci transportowej. Otrzymane wyniki obliczeń wskazują, że zwiększanie płynności ruchu w miejskich sieciach transportowych może być osiągane zarówno przez budowanie obwodnic miasta, jak również podwyższanie niezawodności skrzyżowań. Efekt ten można uzyskać przez odpowiednią organizację ruchu na skrzyżowaniach i sterowanie sygnalizacją świetlną, a także budowę skrzyżowań bezkolizyjnych. Wyniki obliczeń niezawodnościowych sieci komunikacyjnych o różnych konfiguracjach można porównywać oceniając efektywność wprowadzanych zmian.
In this paper, we present a method for the determination of the reliability of transport networks in urban areas. One of computational tools that is used to determine reliability of the network systems is a factoring algorithm. We adapt it for the specific application to a car transport network. The developed method may be used to study how the entire transport network depends on reliability of crossroads, additional roads and bypass of city. We also present an example of application to a real transport network. Our results suggest that the reduction of traffic in urban transport network may be actieved by additional bypasses of a city as well as an improvement of the reliability of crossroads. The reliability of crossroads may be improved by a proper traffic control, a control of traffic lights and a new flyover crossings. Our method allows to compare reliability of different configurations of transport networks, thus is allows to evaluate changes in car traffic control.
Źródło:: Problemy Eksploatacji; 2009, 1; 157-165
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: A Study of Wireless Sensor Networks to Comprehend their Relevance to Different Applications
Autorzy:: Agarkhed, Jayashree
Dattatraya, Patil Yogita
Patil, Siddarama
Powiązania:: https://bibliotekanauki.pl/articles/308904.pdf
Data publikacji:: 2020
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: clustering
energy efficiency
multipath-based routing
wireless sensor network
Opis:: Wireless sensor networks (WSNs) have experienced enormous growth, both in terms of the technology used and their practical applications. In order to understand the features of WSNs that make the solution suitable for a speciﬁc purpose, one needs to be aware of the theoretical concepts behind and technological aspects of WSNs. In this paper, the signiﬁcance of WSNs is illustrated, with a particular emphasis placed on their demands and on understanding researchrelated problems. A review of the literature available is presented as well. Detailed discussions concerning sensor node architecture, different types of sensors used and their relevance for various types of WSNs is presented, highlighting the need to achieve application-speciﬁc requirements without degrading service quality. Multipath and cluster-based routing protocols are compared in order to analyze QoS requirements they are capable of satisfying, and their suitability for different application areas is reviewed. This survey highlights the performance of different routing protocols, therefore providing guidelines enabling each of the routing techniques to be used, in an efficient manner, with factors such as speciﬁc network structure, protocol operation and routing path construction taken into consideration in order to achieve better performance.
Źródło:: Journal of Telecommunications and Information Technology; 2020, 2; 3-13
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Efficient Performance and Lower Complexity of Error Control Schemes for WPAN Bluetooth Networks
Autorzy:: El-Bendary, M. A. M.
El-Tokhy, M. A. R.
Powiązania:: https://bibliotekanauki.pl/articles/308324.pdf
Data publikacji:: 2014
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: Bluetooth
EDR
packet loss
power efficiency
Wireless Personal Area Network
Opis:: This paper presents a new technique of reduction retransmission time by decreasing the discarded packets and combating the complexity through error control techniques. The work is based on Bluetooth, one of the most common Wireless Personal Area Network. Its early versions employ an expurgated Hamming code for error correction. In this paper, a new packet format using different error correction coding scheme and new formats for the EDR Bluetooth packets are presented. A study for the Packet Error Probability of classic and Enhanced Data Rate (EDR) packets is also presented to indicate the performance. The simulation experiments are performed over Additive White Gaussian Noise (AWGN) and Rayleigh flat-fading channels. The experimental results reveal that the proposed coding scheme for EDR packets enhances the power efficiency of the Bluetooth system and reduce the losses of EDR packets.
Źródło:: Journal of Telecommunications and Information Technology; 2014, 4; 100-107
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Self-organization of students’ activity as a condition of effective electronic educational communication
Autorzy:: L, Sungurova, Nina
B, Karabushchenko, Natalya
Daria, Mikhailova,
Powiązania:: https://bibliotekanauki.pl/articles/892518.pdf
Data publikacji:: 2019-05-01
Wydawca:: Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:: self-organisation of activity
network activity
educational style
psychological efficiency
Opis:: The virtual environment allows solving new educational problems, but also generates new educational, psychological and pedagogical effects, new experience. E-learning, like traditional learning, is realised with the help of three most common technologies: self-learning technology; one-to-one learning technology; one-to-many learning technology. At the same time, e-learning interaction involves self-organisation of the individual and the organisation of joint distributed activities of students. Self-organisation of the individual is understood as the ability to structure personal time, tactically plan own activities, purposefully act in solving problems. The effectiveness of educational activities of students in the conditions of e-learning depends on how students are guided by their own internal principles, the ability to create conditions for the optimization of learning tasks and actions. The article presents the results of theoretical and empirical research of self-organisation of the individual in the context of effective distribution of time resources, describes the psychological strategies of network activity of students, highlights the features of educational styles, levels of psychological efficiency of interaction with information technology.
Źródło:: Kwartalnik Pedagogiczny; 2019, 64(1(251)); 163-174
0023-5938
Pojawia się w:: Kwartalnik Pedagogiczny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Efficiency measurement in dynamic two-stage network structures with flexible intermediate materials
Autorzy:: Kordrostami, S.
Seyedboveir, S.
Daneshian, B.
Amirteimoori, A.
Powiązania:: https://bibliotekanauki.pl/articles/406486.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: data envelopment analysis
flexible factors
dynamic two-stage network
efficiency
Opis:: Data envelopment analysis (DEA) is a nonparametric method for evaluating the relative efficiency of decision making units (DMUs) described by multiple inputs and multiple outputs. Since DEA was introduced in the 1970s, it has been widely applied to measure the efficiency of a wide variety of production and operation systems, including two-stage production systems with a series or parallel structure. The outputs from the first stage to the next stage are called intermediate factors (or measures). In some real applications, an intermediate material or some part of it can become the final output or input to the second stage of production. Previously existing models cannot be employed directly to measure the efficiency of such systems. The authors introduce a dynamic DEA model that identifies the structure of flexible intermediate factors to maximise the measure of overall system efficiency.
Źródło:: Operations Research and Decisions; 2018, 28, 3; 63-76
2081-8858
2391-6060
Pojawia się w:: Operations Research and Decisions
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Znaczenie big data w statycznej i dynamicznej koncepcji efektywności ekonomicznej
Importance of big data in statistics and dynamics of economic efficiency
Autorzy:: Czetwertyński, S.
Powiązania:: https://bibliotekanauki.pl/articles/108911.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:: społeczeństwo sieci
big data
efektywność ekonomiczna
network society
economic efficiency
Opis:: Niniejszy artykuł stanowi próbę rozważenia potencjalnych możliwości, jakie daje generowanie zbioru Big Data w teoretycznych koncepcjach efektywności ekonomicznej. Podstawą dyskursu są dwa odmienne podejścia do kwestii efektywności – statyczne i dynamiczne. W obu ujęciach rozważano, w jaki sposób zastosowanie informacji zawartych w zbiorze Big Data może wpłynąć na poziom efektywności. W artykule przedstawiono również koncepcje społeczeństwa sieciowego w ujęciu budowania jego bazy materialnej, rozumianej jako połączenie internetu rzeczy oraz członków społeczeństwa na zasadzie przedłużenia zmysłów.
This article is an attempt to consider the potential opportunities that generate Big Data in the theoretical concept of economic efficiency. The discourse has been based on two different approaches to efficiency: static and dynamic. In both approaches has been considered how the use of information contained in the Big Data can effect on the level of efficiency. The article also presents the concept of network society in terms of building its material base, understood as the combination of the Internet of things and members of society on the basis of the extension of the senses.
Źródło:: Studia Informatica Pomerania; 2017, 45, 3; 5-14
2451-0424
2300-410X
Pojawia się w:: Studia Informatica Pomerania
Dostawca treści:: Biblioteka Nauki

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