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Tytuł:
Struktura czasu i wydajność pozyskiwania i zrywki drewna w drzewostanach sosnowych przy użyciu harwardera Buffalo Dual
Time structure and efficiency of timber acquisition and skidding in pine-stands using the Buffalo Dual harwarder
Autorzy:
Glazar, K.
Maciejewska, H.
Powiązania:
https://bibliotekanauki.pl/articles/290255.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
harwarder
struktura czasu
wydajność
pozyskiwanie
zrywka
time structure
acquisition
efficiency
skidding
Opis:
Jednym z rozwiązań technologicznych pozyskiwania surowca drzewnego jest stosowanie maszyn wielooperacyjnych. Obok pojawiających się już dość powszechnie w naszych lasach harvesterów i forwarderów można spotkać, choć jeszcze stosunkowo rzadko, harwardery. Przedmiotem badań było określenie struktury czasu i wydajności pozyskiwania i zrywki drewna przy użyciu harwardera Buffalo Dual firmy Ponsse. Na podstawie przeprowadzonych badań ustalono, iż czas operacyjny pozyskania i zrywki drewna w trzebieży późnej stanowił 68% czasu zmiany kontrolnej. Wydajność operacyjna pozyskania kształtowała się na poziomie 12 m3 x h-1, zaś zrywki na poziomie 9 m3 x h-1. Harwarder jest w stanie zrównoważyć pracę harvestera i forwardera. Także pracując wyłącznie w wersji harvester bądź forwarder może być równie wydajny jak te maszyny.
Using of multi-operational machines is one of technological concepts employed when acquiring timber. Besides harvesters and forwarders, which are now becoming common in our forests, we may also find harwarders there, although these are still relatively rare. The purpose of the research was to determine time structure and efficiency of timber acquisition and skidding using the Buffalo Dual harwarder manufactured by Ponsse. Completed tests allowed to determine that operational time required for timber acquisition and skidding in late thinning constituted 68% of check shift time. Operational efficiency for acquisition was close to 12 m3 x h-1, and for skidding - close to 9 m3 x h-1. Harwarder is able to balance work of both harvester and forwarder. Also, when working only in the harvester or forwarder version, its productivity may match these machines as well.
Źródło:
Inżynieria Rolnicza; 2008, R. 12, nr 1(99), 1(99); 111-118
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of performance of short tree logging with farm tractor and logging trailer
Analiza wydajności zrywki drewna krótkiego przy użyciu ciągnika rolniczego i przyczepy zrywkowej
Autorzy:
Kormanek, M.
Fiszer, M.
Powiązania:
https://bibliotekanauki.pl/articles/93596.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
logging unit
performance
working time structure
agregat zrywkowy
wydajność
struktura czasu pracy
Opis:
The paper presents analysis of efficiency of the logging unit comprising Belarus 820 farm tractor and PD80 logging trailer equipped with Ryś-1 crane. Analysis was made based on the working day timing. The unit logged 1- meter long tree pieces (hornbeam, oak, birch) from the area where material for logging was distributed irregularly on the entire felling site. Unfavourable atmospheric conditions were reported during the working day (a thick layer of snow, low temperature, not frozen soil) which could have influenced the unit operation performance. Despite that the performance of the logging unit was comparable to similar logging units described in the literature. Determined coefficient of use of the operating time of the machine K02 was 0.93, coefficient of use of the shift working time K04 - 0.9, coefficient of use of the shift exploitation time K07 - 0.8. Hourly performance in the shift exploitation time was 4.98 m3 h-1 , efficiency in the shift working time W02 - 4.80 m3 h-1 and performance in the general shift time W07 - 4.30 m3 h-1.
W pracy przedstawiono analizę wydajności zestawu zrywkowego składającego się z rolniczego ciągnika uniwersalnego Belarus 820 oraz przyczepy zrywkowej PD 80 wyposażonej w żuraw Ryś-1. Analizy pracy zestawu dokonano w oparciu o chronometraż dnia roboczego. Zestaw w trakcie badań zrywał sortyment o długości 1 metra (grab, dąb, brzoza) z powierzchni gdzie materiał do zrywki był rozłożony w sposób nieuporządkowany na całej powierzchni zrębu. Jak stwierdzono w ciągu dnia roboczego panowały niesprzyjające warunki atmosferyczne (gruba warstwa śniegu, niska temperatura, niezamarznięta gleba), co mogło wpłynąć na efektywność pracy zestawu. Mimo to, wydajności uzyskane przez zestaw zrywkowy były porównywalne z podobnymi zestawami zrywkowymi opisywanymi w literaturze. Wyznaczony współczynnik wykorzystania operacyjnego czasu pracy maszyny K 02 wyniósł 0,93, współczynnik wykorzystania roboczego czasu zmiany K04 - 0,9, współczynnik wykorzystania eksploatacyjnego czasu zmiany K 07 - 0,8. Godzinowa wydajność w eksploatacyjnym czasie zmiany W 02 wyniosła 4,98 m3 h-1 , wydajność w roboczym czasie zmiany W 02 - 4,80 m3 h-1 , a wydajność w ogólnym czasie zmiany W 07 - 4,30 m3 h-1.
Źródło:
Agricultural Engineering; 2018, 22, 2; 29-38
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura roczna i rzeczywisty czas pracy na stanowiskach leśniczego i podleśniczego
Annual structure and actual worktime at the forester and deputy forester workstations
Autorzy:
Grzywiński, W.
Tomczak, A.
Jelonek, T.
Burzyńska-Jędrzejczak, G.
Naskrent, B.
Powiązania:
https://bibliotekanauki.pl/articles/985711.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
stanowisko lesniczego
stanowisko podlesniczego
czas pracy
struktura czasu pracy
struktura roczna czasu pracy
rzeczywisty czas pracy
activity structure
worktime
overtime
forester
deputy forester
Opis:
The aim of the study was to recognize the annual worktime structure and the actual number of working hours at the forester and deputy forester workstations in the State Forests. The research was carried out on the sample group of 462 workers in all regional directorates of the State Forests in 62 forest districts and 242 forest ranges. The study group consisted of 21 (4.5%) forest foresters from one−man forest districts (L1), 222 (48.1%) foresters and 219 deputy foresters (47.4%) from two−men forest ranges (L2 and PDL respectively). Altogether 17 groups of activities were distinguished. The workers were studied in spring, summer, autumn, and winter. Every time the research was conducted during one full week (Monday−Sunday). In case of two−men forest districts, both workers were studied simultaneously. The measurement of timework was carried out with the specially designed mobile application LP1 operating in Android system. The duration of particular activities at L1 and L2 workstations was similar. The office work constituted most of their worktime: 109.7 minutes (22.9%) for L1 and 111.5 min (23.3%) for L2. Transportation took 80.2 and 84.8 min (17.7 and 17.6%), whereas wood sale required 69.7 and 62.8 min (14.5 and 13.1%) for L1 and L2 work stations respectively. At PDL workstation passages took 84.7 min (17.6%), wood quality inspection and registration – 65.4 min (13.6%), and office work – 60 min (12.5%). The tasks comprising preparation, harvesting and sale of raw timber took 34.9% of L1 worktime, 32.5% in case of L2 and 41.6% for PDL’s worktime. All employees devoted the least of their worktime to tasks connected with fire precautions, nature conservation, and environmental education (tab. 1). The overrunning of normative worktime was recorded at all studied workstations. The mean daily worktime for PDL amounted to 8.17 hrs, whereas for L1 and L2 it was 8.47 and 8.52 hrs respectively. Except extra working hours during the working week, the overtime during the days−off was recorded too. Most of time spent on work in such situations was recorded for L1 (1.69 hrs on average per week), while the least (0.97 hrs) for L2 workstation.
Źródło:
Sylwan; 2019, 163, 05; 355-364
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wykorzystania czasu pracy kierowców
Autorzy:
Lorencowicz, E.
Jarmuł, R.
Koszel, M.
Przywara, A.
Powiązania:
https://bibliotekanauki.pl/articles/134660.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
czas pracy
efektywność pracy kierowców
struktura czasu pracy
labour time
efficacy of drivers labour
labour time structure
Opis:
W artykule przedstawiono najważniejsze czynniki i ograniczenia wpływające na efektywność wykorzystania czasu pracy kierowców. Badania wykonało dwóch kierowców w ciągu czterech tygodni, pracując na trasach dalekodystansowych z naczepą podkontenerową oraz kurtynową. Średni dzienny czas pracy kierowców wyniósł odpowiednio 11:55 i 10:27, dzienny czas jazdy – 5:30 i 6:21, a odległość dzienna 499 i 506 km. Współczynnik efektywności czasowej osiągnął wartość 0,45.
The most important factors and limitations, that affecting of the efficiency of time consumption by truck drivers were presented. The study was done basic on data collected by two drivers during four weeks of work on long-haul routes with container and curtain trailer. The average daily working time of drivers was 11 hours 55 minutes and 10 hours 27 minutes. Daily driving time 5 hours 30 minutes and 6 hours 21 minutes. Daily distance 499 km and 506 km per driver. Time efficiency factor reached 0.45.
Źródło:
Problemy Transportu i Logistyki; 2017, 38, 2; 27-38
1644-275X
2353-3005
Pojawia się w:
Problemy Transportu i Logistyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wydajność zrywki drewna skiderem na terenach pochyłych
Efficiency of timber skidding on the slopes
Autorzy:
Kulak, D.
Stańczykiewicz, A.
Szewczyk, G.
Wala, L.
Powiązania:
https://bibliotekanauki.pl/articles/980264.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
pozyskiwanie drewna
zrywka drewna
skidery
struktura czasu pracy
wydajnosc pracy
modelowanie
timber harvesting
skidding
working time
modelling
Opis:
The aim of the study is to characterise the working time structure of an operator of the LKT 82 skidder performing timber skidding on the sloping area, and to develop models of efficiency and time−consumption of the work depending on selected factors characteristic of the described transport process. The research was performed in the Sucha Forest District (S Poland). We considered two treatments: late thinning and felling performed in stands with the dominating share of beech. Logs obtained with chainsaws were initially extracted with horses and laid at the slope road. Later on the additional skidding with skidder tractor was done. Continuous timing of individual operations was performed with the use of a microcomputer equipped with time measurement software (accuracy of 1 second). We also determined skidding distance using a GPS device, the number of extracted logs in the load, and the volume of the logs. The total timing measurements lasted for a total of 70 h 24 min 27 s. During that time, the tractor made 72 cycles, transporting 998 logs with a total volume of 493.3 m3. In the mature stand, the average skidding distance amounted to approximately 1,160 m, a single load consisted of 3−4 logs with a volume of 7.7 m3. The operational efficiency of the skidding was 9.1 m3/h. In the thinning stand, the skidding distance was 1,230 m, the average load consisted of 22 logs with a volume of 5.8 m3. The operational efficiency amounted to 7.8 m3/h, on average. The working time structure was dominated by auxiliary (over 60%) and effective (nearly 30%) times. The obtained regression models of the duration of activities from the group of operational times were characterised by high correlation coefficient (about 0.75 for skidding time and driving without a load). Relatively strong relationships (r > 0.5) were also found between the times of collecting cable pulling and load attachment, and the volume of the extracted loads, and in the case of the times of collecting cable pulling also the type of treatment performed. The regression models for the times of log stacking, pulling the loads up with the winch and detaching them, despite the fact that they were statistically significant, characterised by relatively low correlation coefficients. The relationship between skidding efficiency and skidding distance was also determined (fig.). The duration of skidding cycles was described using the multiple regression with the volume of single loads and the skidding distance as the determinants. The regression models of skidding efficiency and time−consumption of skidding cycles may find practical application in estimating the efficiency of the tasks performed in stands and under conditions similar to those analysed in the present research.
Źródło:
Sylwan; 2019, 163, 07; 601-609
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura czasu pracy harwesterów podczas pozyskania przygodnego
Structure of the operating time of the harvesters during casual logging
Autorzy:
Dvorak, J.
Walczyk, J.
Hoskova, P.
Powiązania:
https://bibliotekanauki.pl/articles/989858.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
usuwanie szkod
pozyskiwanie drewna
harwestery
struktura czasu pracy
wydajnosc pracy
kleski zywiolowe
harvester
operational time
random logging
productivity
Opis:
Natural disasters often cause that large share of acquisitions are performed under contingent conditions. High concentration of raw wood material and urgent need for its rapid removal from the forest demand use of harvesters. Material acquisition in such conditions is much harder and causes loss of performance for working machines. The objective of this paper was to determine the decrease in harvester performance during acquisition of fallen trees, wood scrap and suspended trees compared to acquisition of undamaged trees. Performance analysis was conducted on 10 harvesters from different power class working in the Czech Republic in years 2007−2012. The time structure was determined for the timber acquisition under contingent conditions in 22 forest stands. Later on it was compared with acquisition under normal conditions, i.e. scheduled acquisition on areas with good load carrying capacity and without obstacles and with an inclination up to 33%. There was significant difference in the mean operating time requirements between harvesters from the analysed power classes. Machines form 1st class differed significantly form devices from 2nd and 3rd classed. Results indicate that in spruce stands with wood scrap time consumption increases by 7% when average and high performance harvesters are used. The increase is by 33% during acquisition of fallen trees, while time consumption increases by as much as 79% during acquisition of suspended trees. During acquisition of subversion and wood scrap, performance of average and high performance harvesters ranged between 1.71 up to 17.37 m³/h depending on thickness and type of the damage to obtained trees. Important achievement of presented research is correction factors allowing to change harvester performance standards, while acquisition of fallen trees, wood scrap and suspended trees. Average value of correction factor is 1.19.
Źródło:
Sylwan; 2015, 159, 04; 300-306
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura rocznego czasu pracy leśniczych
The structure of foresters annual work-time
Autorzy:
Kocel, J.
Powiązania:
https://bibliotekanauki.pl/articles/1016323.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
struktura czasu pracy
stanowisko lesniczego
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
lesnictwo
state forests national forest holding
foresters
foresters' work−time structure
annual work−time
Opis:
The structure of the annual work−time of the staff from all kinds of forest sub−districts in the State Forests National Forest Holding (SF), the structure of the average annual work−time of the staff running exclusively the SF forest sub−districts and the structure of the average, annual work−time of the staff from the SF forest sub−districts supervising the forests that are not the property of the State Treasury were studied on the basis of questionnaire surveys conducted in 2004. The studies showed that the staff from all kinds of forest sub−districts spent most of their work−time for the harvesting and sale of timber (36.23% of their annual time on average). Silviculture is the second largest time−consuming activity performed by foresters, accounting for 16.47% of their annual work−time, while forest protection accounts for 12.88% and observations of the forest status – 7.55% of forest sub−district staff's annual work−time.
Źródło:
Sylwan; 2007, 151, 01; 3-10
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czasochłonność zrywki konnej w drzewostanach trzebieżowych
Time consumption of horse skidding operations in thinned stands
Autorzy:
Szewczyk, G.
Powiązania:
https://bibliotekanauki.pl/articles/1009544.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany sosnowe
drzewostany jodlowe
drzewostany bukowe
drzewostany swierkowe
trzebieze
zrywka drewna
zrywka konna
czasochlonnosc
struktura czasu pracy
horse skidding
time consumption
work time
workday structure
Opis:
The paper presents time consumption assessment model (EST) of horse skidding operations in thinned stands taking into consideration factors related to stand, workday structure and characteristics of harvested timber. Significant differences in time consumption levels were observed between early and late thinning operations, as well as between examined pine, beech, spruce and fir stands. The strongest correlation between the EST and the analyzed variables was observed in the case of factors related to the volume of extracted timber.
Źródło:
Sylwan; 2010, 154, 01; 52-63
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Routinen der Angstbewältigung in Thomas Manns "Der Zauberberg"
Autorzy:
Reinhard, Nadja
Powiązania:
https://bibliotekanauki.pl/articles/1032491.pdf
Data publikacji:
2014-12-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
lęk
Thomas Mann
„Czarodziejska Góra”
struktura czasu
choroba
zagrożenia dla pokoju
fear
„Magic Mountai”
cycles of time
ilness
threat to peace
Ängste
„Der Zauberberg”
Strukturder Zeit
Krankheit
Gefährdung des Friedens
Opis:
Soll man in einer neuen Umgebung Ängste aushalten und ertragen, um neue Routinen der Angstbewältigung zu erlernen, oder schleunigst vor der Gefahr fliehen? In der hermetischen Welt seines Romans Der Zauberberg hat Thomas Mann Routinen mit ihrer kreisförmigen Wiederholungsstruktur der Zeit ebenso beschrieben wie die Ängste, die der lineare Fortschritt der Zeit im Prozess der Krankheit und der Gefährdung des Friedens trotz aller Verdrängungsversuche verursacht. Ob der ‚Held‘ des Romans den Krieg überleben wird, bleibt am Ende des Romans offen.
Czy powinniśmy w nowym środowisku wytrzymywać i znosić uczucie lęku po to, by poznać nowe sposoby jego pokonywania, czy też należy jak najszybciej uciec przed grożącym niebezpieczeństwem? W hermetycznym świecie swojej powieści Czarodziejska Góra opisał Tomasz Mann zarówno rutyny – z ich kolistą strukturą powtarzania czasu – jak i lęki, które w procesie choroby i zagrożenia dla pokoju powoduje liniowy postęp czasu, mimo wszelkich podejmowanych prób ich wyparcia. Pytanie, czy ‚bohater‘ przeżyje wojnę, pozostaje do końca powieści otwarte.
When confronted with a new environment, should we withstand and endure fears in order to learn new routines of coping with anxiety, or rather flee from the danger as quickly as possible? In the hermetic world of his novel The Magic Mountain Thomas Mann has described routines with their circular repetition structure of time as well as the fears which the linear progress of time – in spite of all attempts at repression – causes in the process of the disease and the threat to peace. Whether the ‚hero‘ of the novel will survive the war, remains open at the end of the novel.
Źródło:
Convivium. Germanistisches Jahrbuch Polen; 2014; 35-49
2196-8403
Pojawia się w:
Convivium. Germanistisches Jahrbuch Polen
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zrywka drewna średniowymiarowego w drzewostanach trzebieżowych przy użyciu ciągnika rolniczego z przyczepą nasiębierną
Timber extraction in thinned stands using agricultural tractor coupled with a trailer with a hydraulic crane
Autorzy:
Naskrent, B.
Polowy, K.
Grzywiński, W.
Sobczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/979600.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany sosnowe
drzewostany przedrebne
trzebiez pozna
pozyskiwanie drewna
drewno sredniowymiarowe
zrywka drewna
zrywka nasiebierna
fotografia dnia roboczego
struktura czasu pracy
timber extraction
time studies
forest trailer
working day photography
Opis:
The amount of timber extracted from Polish forests is expected to increase in near future. The most common equipment for timber extraction is an agricultural tractor with a trailer equipped with a hydraulic crane. The research was carried out in the Wymiarki Forest District (Regional Directorate of the State Forests in Zielona Góra) in the third (TP1) and fourth age class (TP2) in Scots pine stands, during extraction of timber from thinning. Extraction was carried out using BELARUS MTZ 1221.2 agricultural tractor with PALMS 120 forest trailer equipped with PALMS 700 hydraulic crane. The scope of the study was to conduct time studies of extraction process and to estimate the extraction productivity as well as time and fuel consumption. Working time was measured by stopwatch, while the forwarding distance was determined with measuring wheel. The exact number of logs in each load was established. Average volume of each log and each load was calculated. The dominant work time category was effective working time 74.78% (TP1) and 73.60% (TP2), while the prevailing work task was loading 56.82% (TP1) and 58.99% (TP2). In older stands, the extraction productivity was higher than in younger ones reaching 11.28 and 9.62 m3/h, respectively. Statistical analysis proved that extraction distance significantly affect productivity and time consumption. With increasing extraction distance productivity decreases and time consumption increases. Fuel consumption was exactly the same in younger and older stands (0.52 l/m3).
Źródło:
Sylwan; 2019, 163, 02; 121-129
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura czasu pracy i wydajność maszyn podczas rozdrabniania karp
Time usage and efficiency of machinery during stump crushing
Autorzy:
Galezia, T.
Powiązania:
https://bibliotekanauki.pl/articles/46303.pdf
Data publikacji:
2017
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
pozyskiwanie biomasy
karpina
rozdrabnianie
maszyny
ladowarka czlolowa Doosan DL 250
rozdrabniacz wolnoobrotowy Doppstadt DW 3060
przesiewacz bebnowy Doppstadt SM 518
ciagnik MAN 27.463
czas pracy
struktura czasu pracy
wydajnosc pracy
Źródło:
Leśne Prace Badawcze; 2017, 78, 4
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura poszczególnych kategorii czasu przy zrywce dłużyc ciągnikami
Structure of particular time categories at skidding logs with tractors
Autorzy:
Wojtkowiak, R.
Powiązania:
https://bibliotekanauki.pl/articles/822314.pdf
Data publikacji:
1991
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
pozyskiwanie drewna
dluzyce
zrywka drewna
zrywka ciagnikiem
ciagnik Ursus C-355
ciagnik Tree Farmer C-5-D
ciagnik LKT 80
struktura dnia roboczego
czas pracy
wykorzystanie czasu
Źródło:
Sylwan; 1991, 135, 10
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Execution time prediction model for parallel GPU realizations of discrete transforms computation algorithms
Autorzy:
Puchala, Dariusz
Stokfiszewski, Kamil
Wieloch, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/2173537.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphics processing unit
GPU
execution time prediction model
discrete wavelet transform
DWT
lattice structure
convolution-based approach
orthogonal transform
orthogonal filter banks
time effectiveness
prediction accuracy
procesor graficzny
model przewidywania czasu wykonania
dyskretna transformata falkowa
struktura sieciowa
podejście oparte na splotach
przekształcenia ortogonalne
ortogonalne banki filtrów
efektywność czasowa
dokładność przewidywania
Opis:
Parallel realizations of discrete transforms (DTs) computation algorithms (DTCAs) performed on graphics processing units (GPUs) play a significant role in many modern data processing methods utilized in numerous areas of human activity. In this paper the authors propose a novel execution time prediction model, which allows for accurate and rapid estimation of execution times of various kinds of structurally different DTCAs performed on GPUs of distinct architectures, without the necessity of conducting the actual experiments on physical hardware. The model can serve as a guide for the system analyst in making the optimal choice of the GPU hardware solution for a given computational task involving particular DT calculation, or can help in choosing the best appropriate parallel implementation of the selected DT, given the limitations imposed by available hardware. Restricting the model to exhaustively adhere only to the key common features of DTCAs enables the authors to significantly simplify its structure, leading consequently to its design as a hybrid, analytically–simulational method, exploiting jointly the main advantages of both of the mentioned techniques, namely: time-effectiveness and high prediction accuracy, while, at the same time, causing mutual elimination of the major weaknesses of both of the specified approaches within the proposed solution. The model is validated experimentally on two structurally different parallel methods of discrete wavelet transform (DWT) computation, i.e. the direct convolutionbased and lattice structure-based schemes, by comparing its prediction results with the actual measurements taken for 6 different graphics cards, representing a fairly broad spectrum of GPUs compute architectures. Experimental results reveal the overall average execution time and prediction accuracy of the model to be at a level of 97.2%, with global maximum prediction error of 14.5%, recorded throughout all the conducted experiments, maintaining at the same time high average evaluation speed of 3.5 ms for single simulation duration. The results facilitate inferring the model generality and possibility of extrapolation to other DTCAs and different GPU architectures, which along with the proposed model straightforwardness, time-effectiveness and ease of practical application, makes it, in the authors’ opinion, a very interesting alternative to the related existing solutions.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e139393, 1--30
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Execution time prediction model for parallel GPU realizations of discrete transforms computation algorithms
Autorzy:
Puchala, Dariusz
Stokfiszewski, Kamil
Wieloch, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/2173635.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphics processing unit
GPU
execution time prediction model
discrete wavelet transform
DWT
lattice structure
convolution-based approach
orthogonal transform
orthogonal filter banks
time effectiveness
prediction accuracy
procesor graficzny
model przewidywania czasu wykonania
dyskretna transformata falkowa
struktura sieciowa
podejście oparte na splotach
przekształcenia ortogonalne
ortogonalne banki filtrów
efektywność czasowa
dokładność przewidywania
Opis:
Parallel realizations of discrete transforms (DTs) computation algorithms (DTCAs) performed on graphics processing units (GPUs) play a significant role in many modern data processing methods utilized in numerous areas of human activity. In this paper the authors propose a novel execution time prediction model, which allows for accurate and rapid estimation of execution times of various kinds of structurally different DTCAs performed on GPUs of distinct architectures, without the necessity of conducting the actual experiments on physical hardware. The model can serve as a guide for the system analyst in making the optimal choice of the GPU hardware solution for a given computational task involving particular DT calculation, or can help in choosing the best appropriate parallel implementation of the selected DT, given the limitations imposed by available hardware. Restricting the model to exhaustively adhere only to the key common features of DTCAs enables the authors to significantly simplify its structure, leading consequently to its design as a hybrid, analytically–simulational method, exploiting jointly the main advantages of both of the mentioned techniques, namely: time-effectiveness and high prediction accuracy, while, at the same time, causing mutual elimination of the major weaknesses of both of the specified approaches within the proposed solution. The model is validated experimentally on two structurally different parallel methods of discrete wavelet transform (DWT) computation, i.e. the direct convolutionbased and lattice structure-based schemes, by comparing its prediction results with the actual measurements taken for 6 different graphics cards, representing a fairly broad spectrum of GPUs compute architectures. Experimental results reveal the overall average execution time and prediction accuracy of the model to be at a level of 97.2%, with global maximum prediction error of 14.5%, recorded throughout all the conducted experiments, maintaining at the same time high average evaluation speed of 3.5 ms for single simulation duration. The results facilitate inferring the model generality and possibility of extrapolation to other DTCAs and different GPU architectures, which along with the proposed model straightforwardness, time-effectiveness and ease of practical application, makes it, in the authors’ opinion, a very interesting alternative to the related existing solutions.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; art. no. e139393
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

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