Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "correlation research" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 23
Tytuł:
Research on time-varying reliability of wind power gearbox with failure correlation
Autorzy:
Zheng, Mingliang
Powiązania:
https://bibliotekanauki.pl/articles/2200876.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
wind power gearbox
failure correlation
stress-strength
time-varying reliability
Opis:
In the process of reliability modeling and design of a wind power gearbox, the influence of failure correlation of system components and random dynamic loads can not be ignored. In this paper, taking the output power of each shaft of the gearbox as the starting point, distribution parameters of stress and strength for critical failed components (gear and bearing) of the gearbox are solved. After normalization of these parameters, and when there is a linear correlation between the loads of each component, finally, the time-varying reliability related to failure correlation is calculated based on a full probability differential method by using the stress strength interference theory at the system level, and the results are verified by the Monte-Carlo simulation method. It is found that the failure correlation caused by the external dynamic loads between components can significantly reduce reliability of the gearbox system. The stronger the correlation, the lower the reliability of the gearbox system. Meanwhile, the time-varying reliability conforms to characteristics of the “failure bathtub curve” of typical mechanical products. This paper can lay a foundation for the time-varying reliability optimization design and structural robustness design of the wind power gearbox.
Źródło:
Journal of Theoretical and Applied Mechanics; 2023, 61, 1; 119--127
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel fault diagnosis method for marine blower with vibration signals
Autorzy:
Yan, Guohua
Hu, Yihuai
Jiang, Jiawei
Powiązania:
https://bibliotekanauki.pl/articles/32899234.pdf
Data publikacji:
2022
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
fault diagnosis
marine blower
EEMD
correlation coefficient
AR spectrum
BPNN
Opis:
The vibration signals on marine blowers are non-linear and non-stationary. In addition, the equipment in marine engine room is numerous and affects each other, which makes it difficult to extract fault features of vibration signals in the time domain. This paper proposes a fault diagnosis method based on the combination of Ensemble Empirical Mode Decomposition (EEMD), an Autoregressive model (AR model) and the correlation coefficient method. Firstly, a series of Intrinsic Mode Function (IMF) components were obtained after the vibration signal was decomposed by EEMD. Secondly, effective IMF components were selected by the correlation coefficient method. AR models were established and the power spectrum was analysed. It was verified that blower failure can be accurately diagnosed. In addition, an intelligent diagnosis method was proposed based on the combination of EEMD energy and a Back Propagation Neural Network (BPNN), with a correlation coefficient method to get effective IMF components, and the energy components were calculated, normalised as a feature vector. Finally, the feature vector was sent to the BPNN for training and state recognition. The results indicated that the EEMD-BPNN intelligent fault diagnosis method is suitable for higly accurate fault diagnosis of marine blowers.
Źródło:
Polish Maritime Research; 2022, 2; 77-86
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania własne korelacji zmiennych pracy skazanego w kontekście procesu resocjalizacji penitencjarnej
Own research on the correlation of variables of the convict᾿s work in the context of the penitentiary resocialization process
Autorzy:
Woźniak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1811102.pdf
Data publikacji:
2019
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
skazany
korelacja zmiennych
praca
resocjalizacja penitencjarna
rodzina
badania własne
convicted
correlation of variables
work
penitentiary rehabilitation
family
own research
Opis:
W ujęciu polskiego prawa karnego i wykonawczego do resocjalizacji osób odbywających sankcje izolacyjne zalicza się: pracę, nauczanie, zajęcia kulturalno-oświatowe i sportowe, podtrzymywanie kontaktów z rodziną i światem zewnętrznym, nagrody i kary dyscyplinarne oraz nowe środki i metody oddziaływania na skazanych. Celem przedmiotowego przedsięwzięcia naukowego było zbadanie i ustalenie korelacji zmiennych, jakie towarzyszą skazanym w czasie podejmowanej pracy, w kontekście resocjalizacji penitencjarnej. Analizę badań przeprowadzono na podstawie wyników badań własnych, uzyskanych w sondażu diagnostycznym, przy wykorzystaniu metodologii modelowania regresji liniowej, pozwalającej na wyliczenie współzależności zmiennych, testowanie ich istotności i interpretacji wyników. Za zmienne przyjęto resocjalizację skazanych, pracę, zachowanie wobec współwięźniów oraz utrzymanie rodziny. Otrzymane wyniki powinny pozwolić na potwierdzenie znanej zależności, w której zachodzi korelacja: Praca → człowiek → relacje → skuteczność.
In terms of Polish criminal law, the rehabilitation of people taking isolation sanctions includes: work, teaching, cultural-educational and sporting activities, maintaining contact with the family and the outside world, awards and disciplinary punishments as well as new means and methods of influencing the convicts. The aim of the present scientific undertaking was to investigate and establish the correlation of variables that accompany the convicts during the undertaken work, in the context of penitentiary resocialization. The analysis of the research was based on the results of own research, obtained in a diagnostic survey, using the linear regression modelling methodology, allowing the calculation of the interdependencies of variables, testing their significance and interpretation of results. Behind the variables, rehabilitation of convicts, work, behaviour towards fellow prisoners and family maintenance were taken. The results obtained should allow to confirm the known relationship in which correlation occurs: Work → human → relations → effectiveness.
Źródło:
Roczniki Pedagogiczne; 2019, 11(47), Numer specjalny; 525-538
2080-850X
Pojawia się w:
Roczniki Pedagogiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the correlation between the porosity of plant granular materials and the selected parameters of surface texture
Badania nad korelacją porowatości sypkich materiałów roślinnych z wybranymi parametrami warstwy wierzchniej
Autorzy:
Wojcik, A.
Frączek, J.
Powiązania:
https://bibliotekanauki.pl/articles/971350.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
3D scanning
surface roughness parameters
granular materials
skanowanie 3D
topografia powierzchni
materiały sypkie
Opis:
The issues concerning porosity of granular materials, especially plant materials, are considered very important matters in respect of their transport, storage, precise dosing, and tribological properties. The classic method of measuring porosity requires specialized equipment and takes time, thus often being of little use in dynamic production processes. Therefore, there is a growing need for developing new methods for fast porosity measurement. In the article, the authors present an attempt to define a correlation between the selected parameters of the surface texture of plant granular materials and their porosities. To digitize the surface, an optical 3D scanner and specialized software for analysis of the surface topography were used. The results should provide a basis for the development of innovative methods for measuring porosity based on digital image processing (DIA).
Zagadnienia porowatości materiałów sypkich, w tym w szczególności materiałów roślinnych, są bardzo istotnym elementem związanym z ich transportem, przechowywaniem, precyzyjnym dozowaniem. Klasyczne metody pomiaru tej porowatości wymagają specjalistycznej aparatury i są czasochłonne, a zatem często są mało przydatne w dynamicznych procesach produkcyjnych. Istotne staje się więc opracowanie nowych metod szybkiego pomiaru porowatości. W artykule autorzy przedstawiają próbę określenia korelacji wybranych parametrów warstwy wierzchniej złoża sypkich materiałów roślinnych z jego porowatością. Do akwizycji złoża wykorzystano skaner optyczny 3D oraz specjalistyczne oprogramowanie do analizy topografii powierzchni. Uzyskane wyniki powinny dać podstawę do opracowania innowacyjnej metody pomiaru porowatości opartej o Digital Image Analysis (DIA).
Źródło:
Tribologia; 2016, 270, 6; 179-189
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Subject-Participatory Paradigm in Correlation with the Constitutive Features of Pedagogical Qualitative Research: A Personalistic Perspective
Autorzy:
Szymańska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/2120376.pdf
Data publikacji:
2022-06-29
Wydawca:
Akademia Ignatianum w Krakowie
Tematy:
paradigm
subject-participatory paradigm
qualitative research
the constitutive features
personalistic perspective
Opis:
The aim of the article is to show the correlation between the subject-participatory paradigm and the basic features of qualitative pedagogical research in practical terms. The choice of this research topic can be justified by the insufficient range of literature in the field. Therefore, the subject-participatory paradigm will be explored from the personalistic perspective, with reference to the constitutive features of pedagogical qualitative research in order to address the research problem while taking into account the above-mentioned correlation. The starting point is the concept of the subject-participatory paradigm grounded in the thought of Karol Wojtyła. Then, in conducting a hermeneutic analysis, the author refers to the concepts of scientists such as Dariusz Kubinowski, Krzysztof Szmidt, Marcella Kelly, Maura Dowling, Michelle Millar, Matthew de Carlo, and others. Also, references are made to the research stages, mainly embedded in the creative methodology, which can facilitate the emergence of the correlation between the aforementioned paradigm and the constitutive features of pedagogical qualitative research.
Źródło:
Multidisciplinary Journal of School Education; 2022, 11, 1 (21); 151-169
2543-7585
Pojawia się w:
Multidisciplinary Journal of School Education
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and experimental research of hydraulic losses of an energy converting flow machine with rotating piston
Autorzy:
Nozdrzykowski, K.
Komorowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/135380.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
energy-converting machine
rotating pistons
imulation of hydraulic losses volumetric efficiency
comparative analysis
correlation and integral calculi
Opis:
This article describes the construction and principles of operation of a prototype energy-converting machine – a flow machine with pistons rotating in toroidal spaces. A comparative analysis of the results of simulation and experimental tests of fluid flow resistance in the presented prototype machine has been performed with the use of correlation and integral calculi. The article also presents a comparative analysis of the volumetric efficiency of the examined pump and of a Vogelsang pump with similar design and size. The present state of the research makes it possible draw conclusions about the high exploitation value of the proposed pump construction. For this displacement pump, performance increases along with rotational speed. However, it is different from other pumps by virtue of is simple and compact construction as well as greater capacity in relation to its size.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 49 (121); 54-58
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Korelacja pomiędzy agresją wobec zwierząt a agresją wobec ludzi w świetle badań aktowych
The Correlation Between Aggression Towards Animals and Aggression Towards People in the Light of Records Research
Autorzy:
Narodowska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/698778.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Nauk Prawnych PAN
Tematy:
agresja
przemoc wobec ludzi
przemoc wobec zwierząt
sprawcy
aggression
violence towards people
violence towards animals
perpetrator of violence
Opis:
Brutalisation of crimes involving violence, as well as crimes connected with physicaland verbal aggression in public life can be observed in the Polish society. At the sametime, the media inform about these pathologies in diverse ways. The problem of crimesinvolving violence against individuals is a classic area of criminological research. InPolish criminological literature, problems associated with violence towards animalsare set aside from the basic considerations concerning the problem of violence. Itis noted that this theme is the subject of many English-language publications. InAmerican criminological literature, it is indicated that the perpetrators of abuse(perpetrators of domestic violence) also use violence against domestic animals as socalled“substi tute objects”. There is no indigenous empirical research confirming orfalsifying the hypothesis on the existence of such a correlation. Therefore, the main aimof this work was to define, on the basis of the results of the author’s research, ifthere is any relationship between the phenomenon of aggression towards animalsand propensity for agression towards people. Moreover, the author formulatedthe following research problems: have the perpetrators of crimes involving cruelty toanimals been previously convicted, particularly for any crimes of aggression? Whatkind of crimes were they? Is it possible to specify the common features that characteriseperpetrators who use violence against animals and people? What factors play a leadingrole in the criminogenic process concerning perpetrators of crimes of aggression?The work is divided into five parts. The first, called “Introductory Matters”, offersa review of the status quaestionis and definitions of the basic concepts which appearin the subsequent parts of the paper (violence, aggression, legal status of animals,cruelty to animals). The second part summarises the methodology of the author’sresearch. The applied research method involved researching documents, done by usingthe records research technique (indirect observation). The research tools includedthe author’s questionnaire of records research consisting of 34 questions grouped in fivecategories: preparatory proceedings, court proceedings, trial (the first and the secondinstance), the perpetrator’s deed, the victim of crime, the perpetrator of crime. Thesubject of analysis covered the contents of the court records in criminal cases with legalvalidity concerning Article 35 of the Act on the Protection of Animals. Therefore, onlythe finalised court proceedings were researched. The research included 59 criminalproceedings instituted against 61 persons accused of a prohibited act in the formof animal killing or violence against animals. The research was conducted in the firsthalf of 2017 in the District Court in Olsztyn (2nd Criminal Department and 7th CriminalDepartment). The time range of the research included the period 1997–2016, i.e. sincethe entry into force of the Act on the Protection of Animals until the end of the research, considered as full calendar years. The author researched all criminal cases that endedwith a final judgement. On the basis of the established criteria, criminal cases wereselected in which the relationship between the use of violence by perpetrators towardsanimals and people was ascertained. Further analysis was applied to 23 criminal cases,in which 21 perpetrators were convicted. The third part discusses the research results.The data collected for the purposes of criminal proceedings have provided basic informationconcerning the gender and the age of the perpetrator, his/her education, maritalstatus, employment, prior criminal history, legal qualification of the committed crimesand the statement whether the perpetrator was under the influence of alcohol or drugsat the time of committing the crime. On the basis of personal and cognitive dataof the perpetrators of crimes punishable under Article 35 of the Act on the Protectionof Animals and the forensic and psychiatric opinions drawn up for the purposes ofcriminal proceedings, the characteristics of the studied population were presentedand the factors that could play an important role in the genesis of acts of aggression(risk factors) were identified. In the fourth part, the selected criminological theoriesexplaining the reasons for the aggressive behaviour were referred to specific casesof the examined perpetrators. The work ends with a conclusion which provides a verificationof the researched hypotheses for the purposes of the paper.
Źródło:
Archiwum Kryminologii; 2018, XL; 327-370
0066-6890
2719-4280
Pojawia się w:
Archiwum Kryminologii
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Assessment Of Geographical Borders In Economic Research
Ocena ważności granic geograficznych w badaniach ekonomicznych
Autorzy:
Markowska, Małgorzata
Sobolewski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/633235.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
systemy wagowe
analizy przestrzenne
korelacja przestrzenna
weighing systems
spatial analyses
spatial correlation
Opis:
Długość wspólnej granicy między dwiema jednostkami geograficznymi jest często używana jako podstawowa waga w analizie zależności przestrzennych. Najnowsze propozycje dotyczą m.in. testowania wpływu podziału geograficznego wyższego rzędu na podział niższego rzędu (Markowska i in. 2014; Sokołowski i in. 2013), regionalnej przestrzennej średniej ruchomej oraz nowego współczynnika korelacji przestrzennej (Markowska i in. 2015). W cytowanych pracach nowe metody zilustrowano na przykładach analiz regionów Unii Europejskiej szczebla NUTS 2. Jest oczywiste, że w sensie oddziaływania społeczno-ekonomicznego granice pomiędzy regionami należącymi do różnych państw mają inną ważność niż granice międzyregionalne w ramach tego samego państwa. W niniejszej pracy podano prostą propozycję oceny ważności granic. Należy wziąć jakąś zmienną makroekonomiczną nie wykorzystywaną w aktualnych analizach (np. PKB, śmiertelność niemowląt, wartość HDI) a dostępną na poziomie NUTS 2 i określić lokalną ważność granic dzieląc większą wartość tej zmiennej przez mniejszą dla regionów leżących po obu stronach danej granicy. Następnie rozsądne wydaje się uśrednienie tych ocen ważności dla wewnętrznych granic w każdym z krajów osobno, oraz dla granic międzypaństwowych. Można też wykorzystać oceny ważności bez uśredniania do zbudowania dodatkowego systemu wag.
The length of common border between two geographical units is frequently used as a basic weight in spatial analysis. The newest methodological propositions such as tests for hierarchical relations (Markowska et. al. 2014; Sokołowski et. al. 2013), regional spatial moving average and new spatial correlation coefficient (Markowska et. al. 2015) are using border lengths. In cited references new methods have been illustrated by analyses for EU NUTS2 regions. It is obvious that borders between regions belonging to different countries have different socio-economic impact than borders between regions lying in the same country. A new simple method for assesment the importance of borders is proposed in the paper. It is based on a chosen macroeconomic variable available at NUTS 2 level (e.g. GDP, infant mortality, Human Development Index). For neighboring regions bigger value is divided by smaller value giving the local importance of the given border. These measures of local border importance can be than average for borders within the same country and for borders for each pair of neighboring countries.
Źródło:
Comparative Economic Research. Central and Eastern Europe; 2016, 19, 5; 99-123
1508-2008
2082-6737
Pojawia się w:
Comparative Economic Research. Central and Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metoda DIC
DIC (digital image correlation) method in the research of RC beams strengthened with PBO-FRCM materials
Autorzy:
Marcinczak, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/129343.pdf
Data publikacji:
2019
Wydawca:
PWB MEDIA Zdziebłowski
Tematy:
belka
ścinanie
kompozyt
metodyka pomiaru
korelacja obrazu cyfrowa
mechanizm zniszczenia
odkształcenie
PBO-FRCM
beam
shear
composite
measurement methodology
digital image correlation
DIC
destruction mechanism
deformation
Opis:
The article presents tests of a reinforced concrete beam strengthened in a shear with PBO-FRCM composite materials. Measurement of the deformation of the composite was carried out using two methods - with strain gauges and the optical DIC method (Digital Image Correlation). The DIC method consists in taking a series of photographs of the tested object before and during loading. The surface of the tested element must have randomly spaced spots that are applied to the object before measurement. During the study, the cameras monitor the shifting of spots against each other, which in comparison to the reference image before loading gives information about strains and stresses of the tested element. Measurements of deformation of composite materials using strain gauges are difficult to clearly analyze, because the strain gauge is in a specific, limited place, which does not correspond to the work of the entire composite. In addition, the strain gauge tends to break at the place of crack. The article discusses this problem by presenting the results of deformation of PBO-FRCM composite meshes measured in two mentioned ways, their comparison and discussion of results.
Źródło:
Builder; 2019, 23, 2; 66-68
1896-0642
Pojawia się w:
Builder
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic openness versus economic growth: a correlation study in long-term and short periods based on a selection of European Union countries
Autorzy:
Machowska-Okrój, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/969922.pdf
Data publikacji:
2016
Wydawca:
Akademia Ignatianum w Krakowie
Tematy:
Economic growth
economic openness factor
correlation research
positive dependency
Opis:
Objective: The objective of this paper is to show the connection between economic openness with economic growth and attempt to answer the following question: Did the accession to EU had any affect on correlation between economic growth and the economic openness? Research Design & Methods: The research method adopted here was a study of correlation among the variables. Program "Statistica" have been used to study this correalation. Economic growth plays the role of a dependent variable and is estimated according to GDP. An economy’s openness is an independent variable and is estimated by the openness factor calculated using this formula: the sum of exports and imports divided by GDP. Findings: Not all research agrees with the idea of the positive influence of openness in the economy on economic growth. In 2004, the former ‘Eastern Bloc’ countries (Czech Republic, Estonia, Hungary, Lithuania, Latvia, Poland, Slovak Republic, Slovenia) joined the European Union, offering an opportunity to study the effects of accession. Implications & Recommendations: The study has been divided into two phases. The first phase examines the relation between the economic growth rate and the openness factor for the 24 countries which were members of the EU in 2004. The results show a positive correlation between the studied variables. Afterwards, each of the eight listed countries were researched concerning two time periods: the first from before their accession to the EU and the second after their accession to the EU. Correlation research does not satisfactorily settle this aspect. In the second phase of the study, a longer time horizon was allowed and the former Eastern Bloc countries were researched again. The results were explicit and credible. A positive and statistically substantial correlation for the researched countries was achieved. Contribution & Value Added: On the basis of the conducted research the following conclusions were drawn.An analysis of the correlation between economic growth and economic openness shows a positive dependency with the following assumptions: the researched group consists of the 24 EU countries in 2004 and the research is done within the 2004-2015 period.The twice-run correlation research for the time periods 1995-2004 and 2004-2015 respectively and for the eight selected countries does not present explicit results. Consequently, it cannot be concluded that accession to the EU has positively influenced the correlation between economic growth and economic openness.The correlation research for 1995-2015 and the eight selected countries do confirm the popularity of the idea of the positive influence of the economic openness on economic growth.
Źródło:
Horyzonty Polityki; 2016, 7, 21; 141-165
2082-5897
Pojawia się w:
Horyzonty Polityki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of correlation between temperature rock mass and energy of tremor
Badanie korelacji pomiędzy temperaturą górotworu a energią wstrząsu
Autorzy:
Kowalik, S.
Powiązania:
https://bibliotekanauki.pl/articles/113219.pdf
Data publikacji:
2017
Wydawca:
STE GROUP
Tematy:
rock mass
tremor
temperature
correlation
górotwór
wstrząs górniczy
temperatura
korelacja
Opis:
In paper results of calculations of correlation between temperature of rock mass in coal mine "Jas-Mos", and energy of tremor are presented. Correlation referred temperatures before tremor and after tremor, temperatures before tremor and energy of tremor and temperatures after tremor and energy of tremor. Also multiple correlation was calculated between the test values. At the correlation between difference of temperatures and energy of tremor was also determined.
W pracy przedstawiono wyniki obliczeń korelacji pomiędzy temperaturą górotworu a energią wstrząsu w kopalni węgla „Jas-Mos”. Określono korelację pomiędzy temperaturą przed wstrząsem i po wstrząsie, temperaturą przed wstrząsem i energią wstrząsu oraz temperaturą po wstrząsie i energią wstrząsu. Obliczono też korelację wieloraką pomiędzy badanymi wielkościami. Określono także korelację między różnicą temperatur i energią wstrząsu.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2017, 6, 4; 27-33
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research priorities in the domain of disability – correlation between health and social characteristics. A Polish example
Autorzy:
Kołłątaj, B.
Kołłątaj, W.P.
Cipora, E.
Sygit, K.
Karwat, I.D.
Powiązania:
https://bibliotekanauki.pl/articles/28761743.pdf
Data publikacji:
2022
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2022, 29, 4; 463-470
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strain optical analysis of 3D printing elements in different additive technologies in comparison with the finite element method
Optyczna analiza odkształceń elementów wydrukowanych 3D w wybranych technologiach przyrostowych w porównaniu do metody elementów skończonych
Autorzy:
Kluska, E.
Gruda, P.
Majca-Nowak, N.
Powiązania:
https://bibliotekanauki.pl/articles/36391367.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
additive technology
3D printing
digital image correlation
finite element method
druk 3D
cyfrowa korelacja obrazu
metoda elementów skończonych
Opis:
Research included in this article were conducted with a project: ‘Additive technology used in conduction with optical methods for rapid prototyping of 3D printed models’. In this article intellectualized three various 3D printing technologies: Fused Deposition Modelling (FDM), Selective laser Sintering (SlS) and Material Jetting (PolyJet). Also, there was presented theory of digital Image correlation (DIC) as an optical method for strain analysis. The limitations of DIC system have been tested and detected. The test result for DIC system were shown for each method of additive technologies and the results were compared to Finite Element Method (FEM). Test specimens were printed in selected technologies for reference. DIC system has been used for displacement state in loaded objects. The last paragraph contains both summary and tests results.
W niniejszym artykule przedstawiono prace wykonane w ramach projektu „Wykorzystanie metod druku 3D (rapid prototyping) w połączeniu z badaniami optycznymi do szybkiego optymalizowania przestrzennych modeli wykonanych w technologii przyrostowej”. Artykuł rozpoczyna się od przedstawienia trzech wybranych technologii drukowania 3D: Fused Deposition Modeling (FDM), Selective Laser Sintering (SLS) oraz Material Jetting(PolyJet). W wybranych technologiach zostały wydrukowane testowe próbki referencyjne. Następnie opisano teorię dotyczącą cyfrowej korelacji obrazu DIC jako optycznej metody analizy odkształceń. W pracy przedstawiono wyniki testowania wybranych technologii druku 3D za pomocą systemu cyfrowej korelacji obrazu w porównaniu do metody elementów skończonych MES. Przetestowano również ograniczenia systemu DIC. Cyfrowa korelacja obrazu użyta jest do analizy stanu przemieszczeń w rzeczywistych obiektach poddanych obciążeniu. Artykuł zakończono podsumowaniem zawierającym wnioski oraz omówienie otrzymanych wyników.
Źródło:
Transactions on Aerospace Research; 2018, 3 (252); 51-68
0509-6669
2545-2835
Pojawia się w:
Transactions on Aerospace Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of In-Plane Shear Properties of Laminate with V-Notch Rail Shear Test and Digital Image Correlation
Autorzy:
Karny, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/36405939.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
digital image correlation
in-plane shear
thermoplastic laminates
v-notch rail shear
Opis:
This article presents the results of the application of Digital Image Correlation (DIC) to measurements of in-plane shear modulus and strength of three different carbon fiber reinforced laminates. Three different approaches to shear strain calculations via DIC are evaluated and compared with standard strain gage measurements. Calculation of shear strain based on averaging DIC strain values of strain gages area in most cases yielded results closest to strain gages, while measurements based on single point strain measuring differed the most from strain gages. These results are attributed to shear strain distribution in the center area of the specimen. Thermoplastic matrix fabric reinforced composite had the lowest shear strength at 5% of shear strain, but the highest ultimate shear strength and strain at failure. Of thermosetting materials, laminate reinforced with unidirectional carbon fiber had shear modulus about 10% lower, than fabric reinforced laminate, but higher ultimate strength and strain at failure. This behavior is attributed to the presence of weaves in fabric reinforcing the laminate, causing shear stiffening of the material, but lowering its ability to deform under shear loading.
Źródło:
Transactions on Aerospace Research; 2019, 3 (256); 57-65
0509-6669
2545-2835
Pojawia się w:
Transactions on Aerospace Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Replication Study of the Slovak MESI Scale and its Construct Validity in Two Research Samples
Autorzy:
Kaliská, Lada
Salbot, Vladimír
Heinzová, Zuzana
Powiązania:
https://bibliotekanauki.pl/articles/1968716.pdf
Data publikacji:
2019-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
emotional intelligence
social intelligence
MESI scale
TEIQue-SF questionnaire
replication study
CFA
correlation and regression analyses
Opis:
The replication study offers research findings from verification of the construct validity of social intelligence by the Slovak MESI scale (Manipulation, Empathy, Social Irritability - MESI, Frankovský, Birknerová, 2014) by means of confirmatory factor analysis, and by convergent/discriminant validity by the trait emotional intelligence questionnaire (Petrides, 2009) in two samples (secondary school students: N = 134, Mage = 17.7 years old /SD = 0.47/, 66% women; university students: N = 138, Mage = 21.52 years old /SD = 1.81/, 77% women). Results of confirmatory factor analysis (CFA) confirm the three-factor solution of the MESI scale (extracted factors of Manipulation, Empathy, Social Irritability) in accordance with the authors’ original solution in both samples. Trait emotional intelligence (EI) and its four factors enter into significant positive relationships with Empathy (convergent validity) and negative relationships with Social Irritability (discriminant validity). The global level of trait EI can be predicted by the factor of Empathy and Social Irritability in both research samples. Our findings confirm substantiation of the MESI scale for assessment of social intelligence, and its possible application in targeted educational interventions in a school environment.
Źródło:
The New Educational Review; 2019, 56; 305-316
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies