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Tytuł:
Implementation of Fishbone Diagram by cause & effect analysis for construction projects
Wdrożenie diagramu rybiej ości poprzez analizę przyczynowo-skutkową dla projektów budowlanych
Autorzy:
Kaya, Burak Ozan
Powiązania:
https://bibliotekanauki.pl/articles/24085329.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
Fishbone Diagram
construction
construction project management
quality management
Ishikawa diagram
5M’s
diagram rybiej ości
konstrukcja
zarządzanie projektem budowlanym
zarządzanie jakością
diagram Ishikawy
5M
Opis:
This study aims to practice the implementation of the Fishbone Diagram for Cause & Effect Analysis and prove the validity of the technique’s usability in any construction project to increase productivity for both construction managers and engineers. In every sub-branch of the given Fishbone Diagram, possible failures might be expected to occur unless necessary precautions are taken. The failures, emerge as significant problems and range from possible delays to product quality deficiencies which would affect the acceptance of the project from customers. During the creation of the Fishbone Diagram, the obtained results show us that possible delays are co-existing among each of the 5 M's. Fishbone Diagram in the study also points out there are common issues and similarities between Men and Machine since both 2 M’s lead to progress in a construction project and are interdependent. As a result of this study, usage of Fishbone Diagram Technique demonstrated the possible connections between M’s and determination of the Cause & Effect relations in a construction project. Findings of this study proved that usage of Cause & Effect Analysis in construction projects is also practical to determine the key points of a construction and interdependent factors.
Źródło:
Archiwum Wiedzy Inżynierskiej; 2023, 8, 1; 6--8
2544-2449
Pojawia się w:
Archiwum Wiedzy Inżynierskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How machine learning algorithms are used in meteorological data classification: a comparative approach between DT, LMT, M5-MT, gradient boosting and GWLM-NARX models
Autorzy:
Fayaz, Sheikh Amir
Zaman, Majid
Butt, Muheet Ahmed
Kaul, Sameer
Powiązania:
https://bibliotekanauki.pl/articles/38433812.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
meteorological data
M5 model tree
linear model functions
gradient boosting
logistic model tree
Opis:
Rainfall prediction is one of the most challenging task faced by researchers over the years. Many machine learning and AI based algorithms have been implemented on different datasets for better prediction purposes, but there is not a single solution which perfectly predicts the rainfall. Accurate prediction still remains a question to researchers. We offer a machine learning-based comparison evaluation of rainfall models for Kashmir province. Both local geographic features and the time horizon has influence on weather forecasting. Decision trees, Logistic Model Trees (LMT), and M5 model trees are examples of predictive models based on algorithms. GWLM-NARX, Gradient Boosting, and other techniques were investigated. Weather predictors measured from three major meteorological stations in the Kashmir area of the UT of J&K, India, were utilized in the models. We compared the proposed models based on their accuracy, kappa, interpretability, and other statistics, as well as the significance of the predictors utilized. On the original dataset, the DT model delivers an accuracy of 80.12 percent, followed by the LMT and Gradient boosting models, which produce accuracy of 87.23 percent and 87.51 percent, respectively. Furthermore, when continuous data was used in the M5-MT and GWLM-NARX models, the NARX model performed better, with mean squared error (MSE) and regression value (R) predictions of 3.12 percent and 0.9899 percent in training, 0.144 percent and 0.9936 percent in validation, and 0.311 percent and 0.9988 percent in testing.
Źródło:
Applied Computer Science; 2022, 18, 4; 16-27
1895-3735
2353-6977
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of flexural strength of FRC pavements by soft computing techniques
Autorzy:
Kimteta, A.
Thakur, M.S.
Sihag, P.
Upadhya, A.
Sharma, N.
Powiązania:
https://bibliotekanauki.pl/articles/24200582.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
flexural strength
fibre reinforced concrete
artificial neural network
random forest
random tree
M5P based model
wytrzymałość na zginanie
beton zbrojony włóknami
sztuczna sieć neuronowa
las losowy
drzewo losowe
model oparty na M5P
Opis:
Purpose: The mechanical characteristics of concrete used in rigid pavements can be improved by using fibre-reinforced concrete. The purpose of the study was to predict the flexural strength of the fibre-reinforced concrete for ten input variables i.e., cement, fine aggregate, coarse aggregate, water, superplasticizer/high range water reducer, glass fibre, polypropylene fibre, steel fibres, length and diameter of fibre and further to perform the sensitivity analysis to determine the most sensitive input variable which affects the flexural strength of the said fibre-reinforced concrete. Design/methodology/approach: The data used in the study was acquired from the published literature to create the soft computing modes. Four soft computing techniques i.e., Artificial neural networks (ANN), Random forests (RF), Random trees RT), and M5P, were applied to predict the flexural strength of fibre-reinforced concrete for rigid pavement using ten significant input variables as stated in the ‘purpose’. The most performing algorithm was determined after evaluating the applied models on the threshold of five statistical indices, i.e., the coefficient of correlation, mean absolute error, root mean square error, relative absolute error, and root relative squared error. The sensitivity analysis for most sensitive input variable was performed with out-performing model, i.e., ANN. Findings: The testing stage findings show that the Artificial neural networks model outperformed other applicable models, having the highest coefficient of correlation (0.9408), the lowest mean absolute error (0.8292), and the lowest root mean squared error (1.1285). Furthermore, the sensitivity analysis was performed using the artificial neural networks model. The results demonstrate that polypropylene fibre-reinforced concrete significantly influences the prediction of the flexural strength of fibre-reinforced concrete. Research limitations/implications: Large datasets may enhance machine learning technique performance. Originality/value: The article's novelty is that the most suitable model amongst the four applied techniques has been identified, which gives far better accuracy in predicting flexural strength.
Źródło:
Archives of Materials Science and Engineering; 2022, 117, 1; 13--24
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usługi edukacyjne w Polsce w dobie pandemii COVID-19
Educational services in Poland during the COVID‑19 pandemic
Autorzy:
Świętek, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2211857.pdf
Data publikacji:
2022-06-29
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
COVID-19
crisis
education
educational service sector
5 Forces Method by M.E.Porter
pandemic
edukacja
kryzys
metoda pięciu sił konkurencyjnych M.E. Portera
pandemia
branża usług edukacyjnych
Opis:
Kryzys edukacji w pandemii COVID-19 jest w ostatnich dwóch latach tak często dyskutowanym medialnie tematem, że powoli staje się frazesem. Opinia publiczna skupia się na problemach adaptacyjnych uczniów i nauczycieli w zakresie psychologicznym, technicznym oraz organizacyjnym. Podobna tematyka dominuje w pracach naukowych. Zdecydowanie mniejsze jest zainteresowanie ekonomiczną analizą wpływu pandemii COVID-19 na branżę usług edukacyjnych. Przedmiotem artykułu są usługi edukacyjne w Polsce w dobie pandemii COVID-19. Opracowanie przedstawia wyniki badania branży usług edukacyjnych świadczonych w ramach obowiązkowego systemu kształcenia (formalnego), przeprowadzonego metodą pięciu sił konkurencyjnych M.E. Portera. Celem badania była odpowiedź na pytanie, jaka jest kondycja branży usług edukacyjnych w Polsce w dobie pandemii (w latach 2020, 2021) – czy przeżywa ona kryzys oraz jakie mogą być potencjalne konsekwencje tego kryzysu w przyszłości. W artykule dokonano analizy strukturalnej branży i diagnozy stanu rynku usług edukacyjnych w Polsce w zakresie kształcenia formalnego w czasie pandemii COVID-19 na podstawie licznych raportów, w szczególności NIK, Centrum Edukacji Cyfrowej i grupy naukowców Uniwersytetu Warszawskiego. Analiza wykazała zarówno kryzys jakości usług edukacyjnych świadczonych przez państwowy system oświaty, jak i wskazała obszary wcześniejszych zaniedbań w szkolnictwie publicznym w zakresie rozwoju kompetencji cyfrowych nauczycieli, wyposażenia szkół oraz rosnącego znaczenia i konkurencyjności szkolnictwa niepublicznego w Polsce, które w najbliższym czasie, wskutek pandemii, może przełamać strukturalną dominację szkolnictwa publicznego.
The education crisis in the COVID-19 pandemic has been such a much‑discussed media topic in the last two years that it is slowly becoming a platitude. The public opinion focuses on the adaptation, i.e. psychological, technical and organisational problems of students and teachers. Similar topics dominate in academic papers. There is far less interest in an economic analysis of the impact of the COVID-19 pandemic on the sector of educational services. The paper is devoted to educational services in Poland during the COVID-19 pandemic. The study presents a survey of the educational services sector provided within the compulsory (formal) education system conducted using the 5 Forces method By M.E. Porter. The study aims to answer the question about the condition of the educational services sector in Poland in the era of the pandemic (in 2020, 2021), about its potential crisis and potential present and future consequences for educational services. The paper presents a structural analysis of the sector and a diagnosis of the state of the market of educational services in Poland in the field of formal education during the COVID-19 pandemic, based on many reports, in particular those of the Supreme Chamber of Audit, the Centre for Digital Education and a group of researchers at the University of Warsaw. The analysis revealed a crisis in the quality of educational services provided by the state educational system, areas of previous neglect in public education in terms of the development of digital competencies of teachers and school equipment and the growing importance and competitiveness of non‑public education in Poland, which shortly, thanks to the pandemic, may break the structural domination of public education.
Źródło:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego; 2022, 36, 2; 91-106
2080-1653
Pojawia się w:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study for deriving stagedischarge – sediment concentration relationships using soft computing techniques
Autorzy:
Sihag, P.
Sadikhani, M. R.
Vambol, V.
Vambol, S.
Prabhakar, A. K.
Sharma, N.
Powiązania:
https://bibliotekanauki.pl/articles/1818806.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
sediment load concentration
Baitarani river
M5P
random forest
ładunek osadu
stężenie
rzeka Baitarani
las losowy
Opis:
Purpose: Knowledge of sediment load carried by any river is essential for designing and planning of hydro power and irrigation projects. So the aim of this study is to develop and evaluating the best soft-computing-based model with M5P and Random Forest regressionbased techniques for computation of sediment using datasets of daily discharge, daily gauge and sediment load at the Champua gauging site of the Upper Baitarani river basin of India. Design/methodology/approach: Last few decades, the soft computing techniques based models have been successfully used in water resources modelling and estimation. In this study, the potential of tree based models are examined by developing and comparing sediment load prediction models, based on M5P tree and Random forest regression (RF). Several M5P and RF based models have been applied to a gauging site of the Baitarani River at Odisha, India. To evaluate the performance of the selected M5P and RF-based models, three most popular statistical parameters are selected such as coefficient of correlation, root mean square error and mean absolute error. Findings: A comparison of the results suggested that RF-based model could be applied successfully for the prediction of sediment load concentration with a relatively higher magnitude of prediction accuracy. In RF-based models Qt, Q(t-1), Q(t-2), S(t-1), S(t-2), Ht and H(t-1) combination based M10 model work superior than other combination based models. Another major outcome of this investigation is Qt, Q(t-1) and S(t-1) based model M4 works better than other input combination based models using M5P technique. The optimum input combination is Qt, Q(t-1) and S(t-1) for the prediction of sediment load concentration of the Baitarani River at Odisha, India. Research limitations/implications: The developed models were tested for Baitarani River at Odisha, India.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 104, 2; 57--76
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Critical Edition and Philological Analysis of the Text of Isa 42:1–44:5 on the Basis of the Coptic Manuscript sa 52 (M 568) and Other Coptic Manuscripts Written in the Sahidic Dialect of Coptic and the Greek Text of the Septuagint
Autorzy:
Bąk, Tomasz Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/1048767.pdf
Data publikacji:
2020-02-08
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
Coptic
Sahidic dialect
the Book of Isaiah
Deutero-Isaiah
sa 52 (M 568)
edition of Isa 42:1–44:5
Opis:
This paper provides a critical edition and philological analysis of Isa 42:1–44:5, which were worked out on the basis of the Coptic manuscript sa 52.2 and other available manuscripts of the Sahidic dialect. The first part presents general information on the fragment of codex sa 52 (M 568) that includes the discussed text. The next part gives a list and brief characteristics of the other manuscripts containing at least some verses of Isa 42:1–44:5. The focal section of the paper is a presentation of the Sahidic text and its translation into English. The differences between the Sahidic text and the Septuagint, on which the Coptic translation is based, have been presented in tables. They include additions and omissions in the Coptic translation, lexical changes and semantic differences. Finally, the paper examines difficult philological questions observed in the Coptic text. Of special attention are the verses of Isa 42:1–44:5, which occur only in manuscript sa 52.2, and so far have not been published.
Źródło:
The Biblical Annals; 2020, 10, 2; 225-260
2083-2222
2451-2168
Pojawia się w:
The Biblical Annals
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of bearing capacity of H shaped skirted footings on sand using soft computing techniques
Autorzy:
Gnananandarao, -
Khatri, V. N.
Dutta, R. K.
Powiązania:
https://bibliotekanauki.pl/articles/1818514.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
bearing capacity ratio
sand
artificial neural networks
M5P model tree
regular plan shaped skirted footings
H plan shaped skirted footings
współczynnik nośności
piasek
sztuczne sieci neuronowe
drzewo modelu M5P
Opis:
Purpose: The present study aims to apply soft computing techniques, Artificial Neural Network (ANN) and M5P model tree, to predict the ultimate bearing capacity of the H plan shaped skirted footing on the sand Design/methodology/approach: A total of 162 laboratory test data for the regular plan shaped (square, circular, rectangular, and strip (up to L/B = 2.5) skirted footing were collected from the literature to develop the soft computing-based models. These models were later modified for the H Plan shaped skirted footing with the introduction of the multiplication factor. The input variables chosen for the regular plan shaped footings were skirt depth to width of the footing ratio (Ds/B), friction angle of the sand (o), the ratio of the interface friction angle-to-friction angle of sand (5/o), and length-to-width (L/B) ratio of the footing. The output is the bearing capacity ratio (BCR, a ratio of the bearing capacity of the skirted footing to the bearing capacity of un-skirted footing). Findings: Sensitivity analysis was carried out to see the impact of the individual variable on the BCR). The sensitivity results reveal that the skirt depth to width of the footing ratio is the primary variable affecting the BCR. Finally, the performance of the developed soft computing models was assessed using six statistical parameters. The results from the statistical parameters reveal that model developed using ANN was performing superior to the one prepared using M5P model tree technique for the prediction of the ultimate bearing capacity of H plan shaped skirted footing on sand. Research limitations/implications: The model equations are developed with experimental laboratory data. Hence, these equations need further improvement by using field data. However, until now there no field data have been available to include in the present data set. Practical implications: These proposed model equations can be used to predict the bearing capacity of the H-shaped footing with the help of Ds/B, o, S/o and L/B without performing the laboratory experiments. Originality/value: There is no such model equation that was developed so far for the H-shaped skirted footings. Hence, an attempt was made in this article to predict the bearing capacity of the H-shaped footing by using available experimental data with the help of soft computing techniques.
Źródło:
Archives of Materials Science and Engineering; 2020, 103, 2; 62--74
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of scour depth around bridge piers in tandem arrangement using M5 and ANN regression models
Autorzy:
Rahul, M.
Baldev, S.
Powiązania:
https://bibliotekanauki.pl/articles/1818520.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
tandem arrangement
scour depth
sediment
pier
ANN
M5 model
układ tandemowy
głębokość wymycia
osad
pomost
model M5
Opis:
Purpose: Due to an increase in a number of bridges being constructed, scour depth around bridge piers is gradually being recognized as one of the possible reasons for bridge failure. According to [1] about 53% of bridge failures in the US were caused due to floods and corresponding scour in the rivers. Lots of work has been carried out around the single pier but in the case of group piers, the work is very less. Hence, it becomes necessary to calculate the actual scour depth around the bridge piers considering the close location of bridges as well. Design/methodology/approach: Recognizing the need for research in this direction, an experimental study was planned and conducted in the Hydraulics Laboratory of Civil Engineering Department of National Institute of Technology Kurukshetra, India. Experiments were conducted in a standard recirculating tilting bed water flume 15 m long, 0.4 m wide, and 0.60 m deep. The orientation of more than one pier, namely Tandem pattern was employed for the work. Two pier models, 62 mm and 42 mm diameter were used for the experimental study. The mobile bed used in the experiments had an average mean size, d50 = 0.23 mm, 0.30 mm and 0.50 mm. Findings: The outcomes of the ANN function and M5 model analysis have been used to compare with experimental results. From the earlier studies, it was concluded that, when the clear spacing between the pier models was greater than 0D the scour depth around the piers increase with a rapid rate. However, in the case of modelling techniques, M5 models show higher predictive accuracy than ANN models. Research limitations/implications: It is a significant area of research. However, the present study has been a time and facility- constrained study. Therefore, there is a large scope to conduct further studies on the subject, Different pattern i.e. Side by Side; Staggered and Group of piers can be adopted for further investigations. Originality/value: Sufficient work has been done by number of researchers around the single bridge pier. But due to rapid urbanization a number of bridges constructed in close proximity to each other which affects the scour depth of each other. Modelling techniques used in hydraulic engineering are not always effective in practice. The present study discusses the effect of spacing on scouring around piers in a tandem arrangement using experimental as well as modelling techniques. To predict the scour depth of the Tandem arrangement 89 laboratory data sets have been used.
Źródło:
Archives of Materials Science and Engineering; 2020, 102, 2; 49--58
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soft computing based prediction of friction angle of clay
Autorzy:
Dutta, R. K.
Gnananandarao, T.
Ladol, S.
Powiązania:
https://bibliotekanauki.pl/articles/1818506.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
artificial neural network
sensitivity analysis
M5P model tree
multiregression analysis
friction angle of clay
sztuczna sieć neuronowa
analiza wrażliwości
drzewo modelu M5P
analiza wielokrotnej regresji
Opis:
Purpose: This article uses soft computing-based techniques to elaborate a study on the prediction of the friction angle of clay. Design/methodology/approach: A total of 30 data points were collected from the literature to predict the friction angle of the clay. To achieve the friction angle, the independent parameters sand content, silt content, plastic limit and liquid limit were used in the soft computing techniques such as artificial neural networks, M5P model tree and multi regression analysis. Findings: The major findings from this study are that the artificial neural networks are predicting the friction angle of the clay accurately than the M5P model and multi regression analysis. The sensitivity analysis reveals that the clay content is the major influencing independent parameter to predict the friction angle of the clay followed by sand content, liquid limit and plastic limit. Research limitations/implications: The proposed expressions can used to predict the friction angle of the clay accurately but can be further improved using large data for a wider range of applications. Practical implications: The proposed equations can be used to calculate the friction angle of the clay based on sand content, silt content, plastic limit and liquid limit. Originality/value: There is no such expression available in the literature based on soft computing techniques to calculate the friction angle of the clay.
Źródło:
Archives of Materials Science and Engineering; 2020, 104, 2; 58--68
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trudny żywot elektroniki - Lim-5
Autorzy:
Lenartowicz, Teofil (1928- ).
Powiązania:
Skrzydlata Polska 2020, nr 9, s. 19-21
Data publikacji:
2020
Tematy:
Samoloty myśliwskie
Lim-5 (samolot)
Systemy radiolokacyjne
Dalmierze
Stacje radiolokacyjne
RP-5 Izmrud (stacja radiolokacyjna)
SRD – 1M (dalmierz)
Obsługa i eksploatacja
Dane taktyczno-techniczne sprzętu wojskowego
Artykuł z czasopisma fachowego
Opis:
Artykuł przedstawia wspomnienia autora, specjalisty od lotniczych systemów radiolokacyjnych. Omówiono systemy radioloakcyjne polskiego samolotu myśliwskiego Lim-5 produkowanego w WSK PZL-Mielec w latach 1955-1960. Samolot wyposażono w dalmierz SRD-1M, a jego następcę Lim-5P w radiolokator RP-5 Izumrud. Przybliżono wady i zalety tych urządzeń oraz ich eksploatację. Omówiono budowę i dane taktyczno-techniczne.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
GROT vs MSBS
Autorzy:
Sitarski, Michał.
Powiązania:
Strzał 2020, nr 1/2, s. 4-13
Data publikacji:
2019
Tematy:
Broń strzelecka
Karabiny wyborowe
MSBS-5,56 (karabinek)
MSBS Grot S16-M1 (karabinek)
Budowa i konstrukcje
Dane taktyczno-techniczne sprzętu wojskowego
Kolekcjonerstwo militariów
Artykuł z czasopisma fachowego
Artykuł z czasopisma wojskowego
Opis:
Artykuł dotyczy prezentacji demonstratorów technologii karabinków systemu MSBS-5,56. Demonstratory stworzono, by przetestować w praktyce działanie mechaniki broni oraz poprawność przyjętych rozwiązań konstrukcyjnych. System MSBS-5,56 został porównany z karabinkiem MSBS Grot S-16 FB M1.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Comparison of the environmental effect of M1 category vehicles fed with traditional and alternative fuels
Porównanie efektu środowiskowego pojazdów kategorii M1 zasilanych paliwem tradycyjnym i alternatywnym
Autorzy:
Bukrejewski, P.
Skolniak, M.
Kowalski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/1363383.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
CNG
M1 category vehicles
EURO 5
EURO 6
M1
Euro 5
Euro 6
Opis:
The fuels under comparison and the exhaust gas components have been briefly characterized. The pollutant emissions from vehicles powered with traditional fuels and natural gas have been compared with each other, based on the EURO 5 and EURO 6 exhaust emission standards for M1 category vehicles. The emissions from vehicles such as Fiat Panda, Volkswagen Up, Volkswagen Passat, Volkswagen Touran, and Volkswagen Caddy, according to results of type-approval tests and the EURO 5 and EURO 6 standard specifications, have been analysed. Data on noise emission levels, fuel consumption, and vehicle operation costs (fuel costs), related to feeding the vehicles with both conventional and alternative fuels and measured for individual vehicles under consideration, have been presented. According to the data, the CNG-fuelled vehicles were characterized by lower specific distance emission of carbon monoxide in comparison with the similar vehicles powered with petrol. Conversely, the vehicles fuelled with petrol showed lower specific distance emissions of hydrocarbons and nitrogen oxides as against the corresponding vehicles powered with CNG. An exception was Volkswagen Passat, for which the test results were different. For all the CNG-fuelled vehicles, the specific distance emission of carbon dioxide was lower than that measured for the similar vehicles powered with conventional fuels.
W artykule przedstawiono krótką charakterystykę porównywanych paliw oraz składników gazów spalinowych. Porównano emisję zanieczyszczeń pojazdów zasilanych paliwami tradycyjnymi oraz gazem ziemnym, zgodne ze standardem emisji Euro 5 i Euro 6 w kategorii pojazdów M1. Przeanalizowano emisję pojazdów takich jak: Fiat Panda, Volkswagen UP, Volkswagen Passat, Volkswagen Touran, Volkswagen Caddy zgodnie z badaniami homologacyjnymi oraz z normami Euro 5 i Euro 6. Przedstawiono dane dotyczące poziomu natężenia hałasu w poszczególnych opisywanych pojazdach oraz zużycie paliwa i koszty eksploatacyjne (koszty paliwa) związane z zasilaniem pojazdów, zarówno paliwami konwencjonalnymi, jak i paliwami alternatywnymi. Na podstawie danych przedstawionych w niniejszym artykule wynika, iż pojazdy zasilane CNG charakteryzowały się mniejszą emisją drogową tlenku węgla w porównaniu do analogicznych pojazdów zasilanych benzyną, natomiast mniejszą emisję drogową węglowodorów i tlenków azotu wykazały pojazdy zasilane benzyną w stosunku do analogicznych pojazdów zasilanych CNG za wyjątkiem testów dotyczących pojazdu Volkswagen Passat. We wszystkich analizowanych pojazdach zasilanych CNG emisja drogowa ditlenku węgla jest mniejsza niż w analogicznych pojazdach zasilanych paliwami konwencjonalnymi.
Źródło:
Archiwum Motoryzacji; 2017, 75, 1; 5-21
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Underwater wet repair welding of API 5L X65M pipeline steel
Autorzy:
Rogalski, G.
Fydrych, D.
Łabanowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/258860.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
underwater welding
wet welding
underwater pipeline
API 5L X65M steel
Opis:
This paper presents results of the research of effect of polymer insulation of pipeline made of API 5L X65M steel as well as underwater wet welding parameters on properties of joints made by covered electrodes. Effect of heat input on structure and hardness of joints during repair of underwater pipeline was analyzed. Welding defects like microcracks, micro-lacks of fusion, slag inclusions, as well as HAZ hardness increase over an assumed acceptance criterion for welded joints in pipes without anticorrosion polymer insulation, were identified. A significant effect of polimer insulation on structure and properties of welded joints, was found.
Źródło:
Polish Maritime Research; 2017, S 1; Bibliogr. 27 poz., rys., tab.
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie narzędzia zarządzania jakością jakim jest Diagram Ishikawy na przykładzie małego przedsiębiorstwa kaletniczego
Use the quality management tool, which is the Ishikawa Diagram on the example of a small leather business
Autorzy:
Chądzyńska, M.
Klimecka-Tatar, D.
Powiązania:
https://bibliotekanauki.pl/articles/108979.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
diagram Ishikavy
metody zarządzania jakością
metoda 5M
jakość
Diagram Ishikavy
quality management methods
method 5M
quality
Opis:
Wykorzystanie narzędzia zarządzania jakością jakim jest Diagram Ishikavy w małej firmie kaletniczej pozwala na przeprowadzenie dokładnej analizy. Dotyczy ona uszeregowania występujących przyczyn niezgodności oraz tego jakie powiązania panują między nimi. Problemy występujące w firmie pogrupowane zostały w oparciu o zasadę 5M. Zastosowanie Diagramu Ishikavy znacząco ułatwia przedsiębiorstwu znalezienie przyczyn występujących niezgodności oraz tego w jaki sposób są one ze sobą powiązane. Dzięki temu jest ono w stanie zapobiegać występującym problemom.
Using a quality management tool such as Ishikavy Diagram in a small leather company allows to carry out a preliminary quality analysis. It concerns on the ranking of the nonconformity causes and the relationships between them. The problems in the company have been grouped on the basis of the 5M rule. The use of the Ishikavy Diagram significantly facilitates the company's understanding of the nonconformities causes and help to prevent problems.
Źródło:
Archiwum Wiedzy Inżynierskiej; 2017, 2, 1; 20-22
2544-2449
Pojawia się w:
Archiwum Wiedzy Inżynierskiej
Dostawca treści:
Biblioteka Nauki
Artykuł

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