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Tytuł:
Practical Remarks on Power Consumption in WLAN Access Points
Autorzy:
Kowal, Michał
Staniec, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/227224.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
802.11n
beacon
power consumption
Raspberry Pi3
OpenWrt
Opis:
The article presents the power consumptions measurements performed for three wireless routers operating in IEEE 802.11n standard. A typical consumer-class device Asus RTAC66U was chosen, an operator-class Gateworks Laguna GW2387 and a router built based on the Raspberry Pi3 platform. The aim of experiments was to test the influence of the beacon interframe interval, a client association (joining) in the network and the transmission itself, on the lifetime of battery-powered devices. Theoretical calculations were also performed for the influence of the analyzed scenarios on the battery-powered devices.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 1; 173-178
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energochłonność produkcji powidła śliwkowego
Power consumption during production of plum butter
Autorzy:
Rutkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/291822.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
powidło śliwkowe
zużycie energii
nakłady robocizny
przecier
plum butter
power consumption
labour cost
pomace
Opis:
Badania przeprowadzone zostały w zakładzie przetwórstwa owocowo-warzywnego dostosowanego do przerobu wielu rodzajów owoców i warzyw. W niniejszym artykule określono wielkości bezpośrednich na nakładów energetycznych materiałowych i surowcowych przy produkcji powidła śliwkowego.
The research was conducted in a fruit and vegetable processing plant capable of producing quite a few varieties of fruits and vegetables. This article determines size of direct cost of power consumption, materials and raw produce used at the production of plum butter.
Źródło:
Inżynieria Rolnicza; 2007, R. 11, nr 7 (95), 7 (95); 183-189
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific features and models of electric power consumption by household - type consumers
Autorzy:
Frąckowiak, R.
Gałan, T.
Powiązania:
https://bibliotekanauki.pl/articles/97403.pdf
Data publikacji:
2012
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
electric power consumption
power consumption
power network
electrical energy
Opis:
In the paper, the results of analysis of the load curves for the household - type consumers fed from the LV electric power network are presented. In the study, the influence of the sunset time and ambient temperature on the electric load curves has been assessed and, consequently, the specific features of the graphs for the allocated consumer groups have been defined. Also, suitable models considering the impact of the observed factors on the electrical energy consumption have been developed. Energy consumption in the tariff zones by the consumers settled according to G12 tariff has been of special interest.
Źródło:
Computer Applications in Electrical Engineering; 2012, 10; 264-274
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artificial neural network modelling to predict optimum power consumption in wood machining
Autorzy:
Tiryaki, S.
Malkocoglu, A.
Ozsahin, S.
Powiązania:
https://bibliotekanauki.pl/articles/52411.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
artificial neural network
modelling
optimization
power consumption
wood processing
planing
wood product
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2016, 59, 196
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric power consumption forecasting for industries in Ahmednagar City: a preliminary study
Autorzy:
Panchal, Riddhi
Kumar, Binod
Powiązania:
https://bibliotekanauki.pl/articles/2050263.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
energy policy
industry
green products
non-green products
FMCG product
non-FMCG products
correlation analysis
Opis:
This paper reports from the study dealing with the preliminary investigations, concerning forecasting of electric power consumption of some industries from Ahmednagar city. The investigations regarding the potential energy consumption are mainly directed to three energy-related aspects or drives, namely: (i) energy policy, (ii) production of green and non-green products, and (iii) production of FMCG (fast-moving consumer goods) and non- FMCG products. The here proposed methodology is implemented in three phases. The first, initial phase concerns the preparation of the questionnaire that clearly addresses the effects of the aforementioned drives on various industries. The issues mentioned in the questionnaire are closely related to the industries from Ahmednagar city. In the second phase, the prepared questionnaire was distributed to the industries of Ahmednagar city. In the questionnaire, all the questions are made mandatory and subsequently, the industrial authorities are demanded to fill up the precise information as much as possible. The responses from the concerned industries related to power management are then subject to analysis. The analysis is done with the focus on correlation coefficients. Thereby, determining the correlation between different factors helps to arrive a conclusion regarding the dependencies of various factors in the potential power consumption of industries in Ahmednagar city.
Źródło:
Control and Cybernetics; 2020, 49, 4; 555-576
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of sequential machining processes in terms of power consumption and surface quality
Autorzy:
Chudy, R.
Grzesik, W.
Powiązania:
https://bibliotekanauki.pl/articles/100080.pdf
Data publikacji:
2016
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
hard turning
ball burnishing
power consumption surface finish
Opis:
This paper presents the practical application of a power measurement system based on computer processing of signals generated by current and voltage sensors connected with spindle and axis driving electric motors. By using LabView data acquisition system, the total power and its components were recorded during machining operations. The experimental study concerns the power consumption and surface roughness produced in a sequential machining process consisting of hard turning and ball burnishing operations under variable machining parameters. In particular, some machining routines including finish hard machining and both single and multi-pass ball burnishing of hard surfaces were performed and compared. Finally, the optimization procedure based on these technological criteria was proposed.
Źródło:
Journal of Machine Engineering; 2016, 16, 3; 67-74
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Continuous wavelet and Hilbert-Huang Transforms applied for analysis of active and reactive power consumption
Autorzy:
Avdakovic, S
Bosovic, A.
Powiązania:
https://bibliotekanauki.pl/articles/221580.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active power consumption
reactive power consumption
continuous wavelet transform (CWT)
empirical mode decomposition
Hilbert-Huang transform
Opis:
Analysis of power consumption presents a very important issue for power distribution system operators. Some power system processes such as planning, demand forecasting, development, etc.., require a complete understanding of behaviour of power consumption for observed area, which requires appropriate techniques for analysis of available data. In this paper, two different time-frequency techniques are applied for analysis of hourly values of active and reactive power consumption from one real power distribution transformer substation in urban part of Sarajevo city. Using the continuous wavelet transform (CWT) with wavelet power spectrum and global wavelet spectrum some properties of analysed time series are determined. Then, empirical mode decomposition (EMD) and Hilbert-Huang Transform (HHT) are applied for the analyses of the same time series and the results showed that both applied approaches can provide very useful information about the behaviour of power consumption for observed time interval and different period (frequency) bands. Also it can be noticed that the results obtained by global wavelet spectrum and marginal Hilbert spectrum are very similar, thus confirming that both approaches could be used for identification of main properties of active and reactive power consumption time series.
Źródło:
Metrology and Measurement Systems; 2014, 21, 3; 413-422
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction and optimization of tower mill grinding power consumption based on GA-BP neural network
Autorzy:
Wang, Ziyang
Hou, Ying
Sobhy, Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/27323660.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
tower mill
grinding power consumption
energy saving
genetic algorithm
BP neural network
Opis:
Grinding is commonly responsible for the liberation of valuable minerals from host rocks but can entail high costs in terms of energy and medium consumption, but a tower mill is a unique power-saving grinding machine over traditional mills. In a tower mill, many operating parameters affect the grinding performance, such as the amount of slurry with a known solid concentration, screw mixer speed, medium filling rate, material-ball ratio, and medium properties. Thus, 25 groups of grinding tests were conducted to establish the relationship between the grinding power consumption and operating parameters. The prediction model was established based on the backpropagation “BP” neural network, further optimized by the genetic algorithm GA to ensure the accuracy of the model, and verified. The test results show that the relative error of the predicted and actual values of the backpropagation “BP” neural network prediction model within 3% was reduced to within 2% by conducting the generic algorithm backpropagation “GA-BP” neural network. The optimum grinding power consumption of 41.069 kWh/t was obtained at the predicted operating parameters of 66.49% grinding concentration, 301.86 r/min screw speed, 20.47% medium filling rate, 96.61% medium ratio, and 0.1394 material-ball ratio. The verifying laboratory test at the optimum conditions, produced a grinding power consumption of 41.85 kWh/t with a relative error of 1.87%, showing the feasibility of using the genetic algorithm and BP neural network to optimize the grinding power consumption of the tower mill.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 172096
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of process parameters on spindle power consumption in abrasive machining of CoCr alloy
Autorzy:
Brazel, E.
Hanley, R.
O'Donell, G. E.
Powiązania:
https://bibliotekanauki.pl/articles/100023.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
power monitoring
abrasive machining
grinding
taguchi
wheel wear
CBN
Opis:
The production environment requires seamless integration, efficiency and robustness of process monitoring solutions. This research investigates data acquisition on the machine tool through the monitoring of NC kernel data. This approach provides many advantages, particularly in an industrial setting where it may be impractical to install additional sensors for process monitoring. The process investigated is abrasive machining of Cobalt Chrome alloy. Cobalt Chrome alloys are extensively used in the biomedical industry as both femoral and tibial components of prosthetic joints. Abrasive machining or grinding is widely employed as the main method for material removal for these components. Understanding the influence of key variables in such a process is necessary before optimization can be achieved. Significant information can be obtained by utilizing power consumption during machining as a process metric. Power consumption of a spindle during an abrasive machining process of Cobalt Chrome alloy is monitored under various conditions through a machine-NC-based application. The effects of changes in feed rate, wheel speed, depth of cut and tool condition are investigated here through Taguchi experimental design. Experimental results are presented with significant machining variables identified.
Źródło:
Journal of Machine Engineering; 2011, 11, 4; 59-69
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of YARN schedulers on power consumption and processing time for various big data benchmarks
Autorzy:
Drypczewski, Krzysztof
Proficz, Jerzy
Stepnowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1955269.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska
Tematy:
Apache Spark
YARN
big data
green computing
Sentinel
Tera Sort
word count
benchmarks
scheduler
Opis:
Climate change caused by human activities can influence the lives of everybody on the planet. The environmental concerns must be taken into consideration by all fields of study includingICT. Green Computing aims to reduce negative effects of IT on the environment while, at the same time, maintaining all of the possible benefits it provides. Several Big Data platforms like Apache Spark or YARN have become widely used in analytics and High-Performance Computing systems due to the reliability and usability of Map Reduce implementations. The authors research the power consumption and energy efficiency of Hadoop YARN schedulers using Apache Spark under three different workloads. The test cases include: sorting large binary files,counting unique words in large text files and processing satellite imagery from the Sentinel-2mission. The presented results show small (2%–11%) but distinct differences in the power consumption of FIFO and FAIR schedulers.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2018, 22, 4; 303--312
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technology mapping of multi-output functions leading to the reduction of dynamic power consumption in FPGAs
Autorzy:
Opara, Adam
Kubica, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/11542700.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
low power synthesis
FPGA
switching activity
technology mapping
czynność przełączania
mapowanie technologii
Opis:
This article presents a synthesis strategy aimed at minimizing the dynamic power consumption of combinational circuits mapped in LUT blocks of FPGAs. The implemented circuits represent the mapping of multi-output functions. Properly selected multi-output functions are described using a new form of the binary decision diagram (BDD), which is an extension of pseudomulti-terminal BDDs (PMTBDDs) in the literature. The essence of limiting power consumption is to include additional parameters during decomposition, such as the switching activity associated with the switching PMTBDD (SWPMTBDD). In addition, we highlight the key importance of circuit optimization methods via non-disjoint decomposition when minimizing power consumption. An algorithm is proposed to assess the effectiveness of decomposition, considering several parameters, such as the number of non-disjoint decompositions as well as that of shared and non-shared bound functions or the switching activity. The results of experiments that demonstrate the effectiveness of the proposed methods are also included.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2023, 33, 2; 267--284
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efektywne ograniczanie zużycia energii elektrycznej w zakładach przemysłowych
Effective reducing power consumption in an industrial factories
Autorzy:
Łukasik, Z.
Kozyra, J.
Kuśmińska–Fijałkowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/252999.pdf
Data publikacji:
2015
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Opis:
Efektywność energetyczna to jeden z najważniejszych obszarów obecnej polityki energetyczno - klimatycznej UE. Zgodnie z jej celami do roku 2020 efektywność energetyczna powinna wzrosnąć o 20%. Ocenia się, że w ciągu ostatnich 10 lat w Polsce dokonał się ogromny postęp w zakresie efektywności energetycznej. Energochłonność Produktu Krajowego Brutto spadła bowiem o około 1/3. W artykule przedstawiono działania poprawiające efektywność energetyczną w obiektach przemysłowych oraz zaprezentowano przykłady oszczędzania energii elektrycznej w tych że obiektach.
Energy efficiency is one of the most important areas of current energy policy – the EU climate. In line with its objectives for 2020 should increase energy efficiency by 20%. It is estimated that over the last 10 years in Poland has made enormous progress in energy efficiency, energy intensity of GPD has fallen since about 1/3. The article presents actions to improve energy efficiency in industrial and presented examples of energy saving opportunities that these objects.
Źródło:
TTS Technika Transportu Szynowego; 2015, 12; 2702-2706
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiary poboru mocy przez mieszarki masy formierskiej
The Measurements of Power Consumption by Moulding Sand Mixers
Autorzy:
Ziółkowski, E.
Smyksy, K.
Wrona, R.
Powiązania:
https://bibliotekanauki.pl/articles/381348.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
monitoring urządzeń
urządzenia odlewnicze
masa formierska
mieszarka odlewnicza
machine monitoring
foundry equipment
moulding sand
moulding sand mixers
Opis:
W artykule przedstawiono zarys metodyki pomiarów poboru mocy przez mieszarki masy formierskiej, z wykorzystaniem oryginalnego komputerowego systemu przeznaczonego do monitorowania i rejestracji chwilowych wartości napięć, prądów i mocy pobieranej przez odlewnicze maszyny i urządzenia o napędzie elektrycznym oraz analizatora jakości energii elektrycznej KEW 6310 firmy Kyoritsu. Powyższy system umożliwia kontrolę eksploatacyjnych parametrów tych urządzeń z uwzględnieniem energochłonności. Poprzez monitorowanie pracy mieszarek, możliwa jest również ocena procesu technologicznego sporządzania masy formierskiej. Metodykę pomiarów oraz sposób analizy wybranych wyników omówiono na przykładzie badań trzech różnych mieszarek: przemysłowej mieszarki krążnikowej, prototypowej mieszarki wirnikowej oraz nowoczesnej, wirnikowej mieszarki laboratoryjnej. Przeprowadzone badania potwierdziły funkcjonalność i przydatność zastosowanego w pomiarach mikroprocesorowego systemu. Umożliwia on określenie szeregu istotnych parametrów z punktu widzenia energochłonności pracy napędów mieszarki. Podstawowe, istotne aspekty monitoringu poboru mocy to: optymalizacja i kontrola procesu mieszania, uwzględniająca jakość sporządzanej masy formierskiej oraz ocenę poprawności pracy mieszarki. Podkreślenia wymaga również możliwość wykorzystania wyników pomiarów w optymalizacji konstrukcji i eksploatacji urządzenia. W badaniach potwierdzono wpływ zmiany wilgotności masy na wybrane parametry energetyczne w procesie mieszania masy.
A method is outlined that can be adopted for measuring the power demand by moulding sand mixers using a dedicated computer system enabling the monitoring and recording of instantaneous voltage and current levels and of power taken up by foundry machines and installations and Power Quality Analyser KEW 6310, Kyoritsu Company. This system allows the operational parameters of electric-powered devices to be effectively monitored taking into account the energy efficiency level. Monitoring of the machine operation gives also possibility of assessment of the moulding sand preparation processes. The methodology of measurements and processing of measurement data is explained using the example of investigation of three different mixers: industrial roller mixer (Simpson type), the prototype rotary mixer and modern rotary mixer for laboratory applications. Tests have confirmed the adequacy and good performance of the microprocessor system used in measurements, allowing the energy efficiency parameters of the mixer drive to be determined accordingly. The fundamental aspects involved in power demand monitoring include: optimization and control of the mixing process, taking into account the moulding sand quality and mixer performance. It has to be emphasised that the measurement results can be also utilised in optimisation of the machine’s constructional and operational features. Tests confirm that variations of moisture content in moulding sand can impact on selected power energy parameters in moulding sand mixing process.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3 spec.; 191-196
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moc mieszadła cyrkulacyjnego w warniku cukrowniczym
Power consumption of a screw agitator used in an evaporating crystallizer
Autorzy:
Rieger, F.
Rzyski, E.
Powiązania:
https://bibliotekanauki.pl/articles/290804.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
moc
mieszadło
charakterystyka
warnik
power
screw agitator
characteristic
evaporating crystallizer
Opis:
W pracy zaproponowano sposób określania mocy mieszadeł pracujących w warnikach cukrowniczych. Obliczenie to następuje na podstawie dwóch liczbowych współczynników, których wartości określa się doświadczalnie.
A method to determine mixing power of screw impellers in evaporating crystallizers is proposed. Relevant calculations were made on the basis of two numerical coefficients whose values are determined experimentally.
Źródło:
Inżynieria Rolnicza; 2005, R. 9, nr 9, 9; 305-311
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Small size OLED display and TFT LCD applications in low power, portable medical devices - power consumption and usability
Autorzy:
Maniura, R.
Drewniok, L.
Stasiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/333270.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
wyświetlacz
kolor
grafika
urządzenie
siła
zużycie
użyteczność
OLED
TFT
LCD
display
color
graphic
device
power
consumptions
usability
Opis:
Modern medical devices are very complex, they must show many different kind of information, from ordinary digital values to sophisticated graphical data. Medical devices have to do it in an understandable way to avoid dangerous mistakes. There are several different ways to present the information. The most appropriate is to use display, in this case the best choice would be the color graphical display. Such kind of display allows many different data to be presented clearly and makes possibilities to create an very intuitive user friendly interface, avoiding misinformation. In portable devices this kind of data presentation is great advantage but we need to take under consideration low power consumption. Additionally, in medical portable devices very important aspects are power source operation time prediction possibility and power consumption stability. To achieve this we need to use displays which have well defined power characteristics, because in portable applications, color displays are often most power consuming parts.
Źródło:
Journal of Medical Informatics & Technologies; 2012, 19; 141-146
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł

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