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Tytuł:
Application of similarity method of distance courses describing the elements content in pavement quality concrete
Autorzy:
Linek, M.
Nita, P.
Powiązania:
https://bibliotekanauki.pl/articles/245753.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
cement concrete
airfield pavement
analysis of similarity
Opis:
The publication presents the application of similarity analysis of distance courses. This method has been applied to define similarity of cement concrete intended for airfield pavements. The scope of works included standard concretes intended for airfield pavements and concretes after frost resistance test. The test has been conducted in diversified media used in the course of winter maintenance. The nature of resistance of pavement quality concrete was discussed with respect to frost resistance thereof. Research procedure was presented and the obtained laboratory tests results were discussed. Concrete samples were subject to observations using scanning electron microscope in order to define changes occurring in the internal microstructure. Chemical microanalysis of concrete composition before, in the course of and after the frost resistance test and the occurring changes were specified. The obtained laboratory tests results were intended for the purposes of the similarity analysis. Results obtained in case of standard pavement quality concrete were considered as comparative values. Characteristics of the remaining concretes were referred to these values and then similarity of distance courses were analysed. It was proved that BWMt concrete was the most similar concrete to the comparative concrete.
Źródło:
Journal of KONES; 2017, 24, 4; 393-398
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of similarity method of distance courses describing the elements content in concrete intended for airfield pavements
Autorzy:
Linek, M.
Powiązania:
https://bibliotekanauki.pl/articles/244596.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
cement concrete
airfield pavement
analysis of similarity
Opis:
The work presents the applied similarity methods of distance courses in case of cement concrete intended for airfield pavements. Composition of concrete mixes was designed and their parameters were defined. Compressive strength of hardened concrete and components thereof and the occurrence of crystal phases were determined. Subject to observations of internal structure of concretes and conducted chemical microanalyses using scanning electron microscope, the contents of diversified elements in four zones were specified. Similarity indexes between input and target sequence were defined. Diagrams presenting the similarity of the analysed concretes were prepared. It was proved that the suggested method could be used to assess the elements content and define the similarity of concrete intended for airfield pavements. The scope of works consisted of two stages. During the first one, two series of cement concrete were prepared. The analysis included cement concretes intended for airfield pavements, in compliance with requirements. The influence of variable environmental conditions with respect to standard ones on the selected features of hardened concretes was assessed.
Źródło:
Journal of KONES; 2017, 24, 4; 385-392
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of similarity method of distance courses describing the elements content in typical cement concrete after thermal cycles
Autorzy:
Linek, Małgorzata
Nita, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/242490.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
cement concrete
airfield pavement
analysis of similarity
thermal cycles
Opis:
The work concerns the use of similarity analysis of distance course. Composition of concrete mixes was designed. The cement concrete composition includes cement, coarse aggregate, fine aggregate, water and admixtures. The laboratory analyses included concretes curing in standard conditions and concretes subject to thermal cycles representing the destructive influence of imposed loading. Laboratory tests assumed the fifty thermal test cycles. A single test cycle included process of alternate heating and cooling. Recurrent influence of temperature stimulated the impact of aircraft on airfield pavements. The assumed heating and cooling time corresponded to the time during which the aircraft effected the most frequently used airfield pavement within the area of Poland. Comparative SEM observations of concretes subject to thermal cycles were conducted. An increase in the width of microcracs has been observed. In case of crystallization, there is diversification within the area of cement matrix, contact area between cement matrix and aggregate grains and in case of porosity characteristics of both concretes. Similarity indexes between input and target sequence were defined. Diagrams presenting the similarity of the analysed concretes were prepared (after 28 days of curing and after thermal cycles). It was proved that the suggested method could be used to define the similarity of concrete intended for airfield pavements.
Źródło:
Journal of KONES; 2019, 26, 4; 163-170
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the similarity of hard coal mines in terms of the number of dangerous incidents caused by the activation of natural hazards
Autorzy:
Tutak, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/2064775.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
coal mine
natural hazards
cluster analysis
taxonomic methods
analysis of similarity
Opis:
Hard coal mines and mining enterprises involved in hard coal exploitation in the area of the Upper Silesian Coal Basin (Górnośląskie Zagłębie Węglowe) are characterised by the presence of natural hazards typical of this type of exploitation. These hazards include the risks related to methane, coal dust explosion, endogenous fires, as well as rock burst and caving of roof rocks. The article presents the results of a taxonomic analysis aimed at determining the similarity of hard coal mines and mining enterprises in Poland in terms of the dangerous incidents caused by the risks related to methane, coal dust explosion, endogenous fires, as well as rock burst and caving of roof rocks. The analysis was carried out for the 2008-2018 data and encompassed a total of 26 hard coal mines and mining enterprises located in the Upper Silesian Coal Basin. The analysis was performed using the k-means method of non-hierarchical clustering. The main objective of the article was to determine homogenous groups (clusters) of mines exhibiting the greatest similarity in terms of dangerous incidents caused by the activation of natural hazards in the years 2008-2018. These data can be successfully used for the development of preventive measures and risk analyses for these enterprises.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 91--100
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of similarity method of distance courses describing the elements content in typical cement concrete
Autorzy:
Linek, M.
Powiązania:
https://bibliotekanauki.pl/articles/242521.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
airfield pavement
cement concrete
concrete microstructure
analysis of similarity
Opis:
The article concerns the use of similarity analysis of distance course in the internal area of cement concrete intended for airfield pavements. Research procedure was presented and the obtained laboratory tests results were discussed. The contents of diversified elements in four zones (cement matrix, contact area between air pores and cement matrix, contact area between fine aggregate and cement matrix and contact area between coarse aggregate and cement matrix) were specified by using scanning electron microscope. Based on the results obtained diagrams similarity of the analysed of areas in the concretes were prepared. The purpose of this article has been the assessment of an opportunity to apply the analysis of similarity of distance courses with respect to cement concrete intended for airfield pavements. The scope of article consisted of two stages. The analysis included cement concretes intended for airfield pavements, in compliance with requirements. The thermal analysis method was used; the selected concrete components were determined by means of quantitative method. The occurrence of crystalline stages was determined using X-ray diffraction method. Internal structure of concrete composite was assessed with the scanning electron microscope.
Źródło:
Journal of KONES; 2018, 25, 4; 239-246
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of similarity method of distance courses describing the elements content in cement concrete after 50 forced thermal cycles
Autorzy:
Linek, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/245164.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
cement concrete
airfield pavement
analysis of similarity
forced thermal cycles
Opis:
The article presents material solution based on the application of ceramic dust as concrete mix component intended for airfield pavements. The applied dust influences the changes in internal structure of concrete composite. Diversification of internal microstructure of cement concrete using the suggested dust has significant influence on the improvement of compressive strength. The laboratory analyses included concretes curing in standard conditions and concretes subject to thermal cycles representing the destructive influence of imposed loading. Comparative SEM observations of concretes subject to 50 thermal cycles proved significant influence of dust on internal structure of composite. In the study 6 samples were selected, which, each time, were intended for the laboratory tests. The applied similarity analysis of distance courses in case of this concrete. Similarity indexes between input and target sequence were defined. Diagrams presenting the similarity of the analysed concretes were prepared (after 28 days of curing and after 50 thermal cycles). It was proved that the suggested method can be used to assess the elements content and define the similarity of concrete intended for airfield pavements in the selected of areas (cement matrix, contact area between fine aggregate and cement matrix, contact area between coarse aggregate and cement matrix and contact area between air voids and cement matrix).
Źródło:
Journal of KONES; 2019, 26, 4; 155-162
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of similarity method of distance courses describing the elements content in cement concrete after frost resistance test
Autorzy:
Linek, M.
Powiązania:
https://bibliotekanauki.pl/articles/246285.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
airfield pavements
cement concrete
ceramic additive
frost resistance
analysis of similarity
Opis:
The work concerns test results of cement concrete and the use of similarity analysis of distance course. Research procedure was presented and the obtained laboratory tests results were discussed. Composition of concrete mixes was designed. The cement concrete composition includes cement, coarse aggregate, fine aggregate, water, admixtures and a ceramic addition. The addition of ceramic was used as a replacement for part of the fine aggregate Fresh concrete mixture parameters were tested and basic parameters of hardened concrete were defined (density, compression strength and tensile strength). The scope of works included concretes intended for airfield pavements and this concretes after frost resistance test. The test has been conducted in diversified media generally used in the course of winter maintenance. Subject to observations of internal structure of concretes and conducted chemical microanalyses using scanning electron microscope, the contents of diversified elements in four zones were specified. The following zones were subject to analysis: cement matrix, contact area between air pores and cement matrix, contact area between fine aggregate and cement matrix and contact area between coarse aggregate and cement matrix. Based on the results obtained diagrams similarity of the analysed concretes were prepared.
Źródło:
Journal of KONES; 2018, 25, 3; 331-337
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Gas and Dust Emissions From the Mining and Quarrying Sector in the European Union Countries
Autorzy:
Tutak, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/2064909.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
mining and quarrying
gas emissions
dust emissions
analysis of similarity
European Union countries
Opis:
Despite the ongoing changes in the energy and economic structure of the European Union countries, mineral and energy resources such as hard coal, brown coal, natural gas, copper ores, zinc ores and many other minerals continue to be extracted. Each year, the mining and extraction sector emits thousands of tons of harmful substances into the atmosphere, in the form of greenhouse and other air-polluting gases, as well as harmful dusts. These substances include, amongst others, carbon dioxide, methane, carbon monoxide, as well as PM2.5 and PM10. The European Union climate policy clearly recommends that the exploitation of mineral resources be carried out in full respect of the principles of their rational, economical and environmentally neutral acquisition, which is confirmed by the promoted strategy of sustainable development economy. Therefore, this means the necessity to undertake actions aimed at limiting the emission of greenhouse gases and air pollutants into the atmosphere. To assess the actions taken by the European Union countries to date with respect to limiting those emissions, a comparative analysis was carried out for the particular countries. This analysis encompassed the emission of harmful substances from the mining and quarrying sector by the European Union countries in the years 2008 and 2017. The purpose of the analysis was to show the diversity of those countries in terms of the emission of harmful gases and dusts, as well as to divide them into similar groups. Such a division paves the way for developing a common climate policy and exchanging experiences between the countries from the particular groups. The European Union countries were divided into similar groups using the k-means grouping method. Comparison was also made for the emissions of the substances under analysis for the particular countries over the research years. The results obtained unequivocally demonstrate that this emission has been limited in the European Union, but there are countries where the emission of certain substances has increased.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 71--82
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podobieństwo struktur gospodarczych
Similarity of economies’ structures - summary
Autorzy:
Walczyk, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/499932.pdf
Data publikacji:
2012
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
struktury gospodarcze
analiza podobieństwa struktur
economic structures
similarity analysis of economic structures
Opis:
Artykuł przedstawia wyniki analizy porównawczej struktur wybranych gospodarek UE w kontekście synchronizacji wahań koniunkturalnych. Obejmuje ona: tworzenie PKB (wartość dodana wg PKD 2007) i rozdysponowanie PKB (struktura wydatków konsumpcyjnych wg COICOP, struktura inwestycji wg CPA). Jako miarę podobieństwa przyjęto zmodyfikowany wskaźnik zaproponowany przez Statteva i Ralevą (Stattev, Raleva, 2006). Stopień podobieństwa struktur gospodarczych jest bardzo zróżnicowany – wysoki w największych gospodarkach UE (Francji, Niemczech, Włoszech), niski w małych gospodarkach peryferyjnych (Litwie, Grecji). Nie zauważono korelacji między zmianami podobieństwa struktur gospodarczych a synchronizacją (postępem w synchroniczności) wahań cyklicznych (brak korelacji dynamicznej). Stwierdzono jednak, że w krajach, w których cykl koniunkturalny jest zsynchronizowany z cyklem koniunktury gospodarczej w strefie euro, te struktury są do siebie podobne (istnieje korelacja statyczna). Ten problem wymaga dalszych badań.
The paper presents the results of comparative analysis of structures of selected EU economies in the context of the synchronisation of their business cycles. We analyse the structures of gross value added (NACE rev. 2), private consumption (COICOP) and investments (CPA). The modified divergence index by Stattev & Raleva (2006) is used to measure structural similarity of the economies. The results show that it varies from being high for the biggest EU economies (France, Germany, Italy) to very low for small, peripheral economies of Lithuania and Greece. We didn’t find any correlation between structural convergence/divergence and synchronisation (progress in synchronicity) of business cycles (no dynamic correlation). We found however that the economies of high cyclical synchronicity with the Euro area (EA17) have production and expenditure structures similar to that of the EA17. This poses a problem for further research.
Źródło:
Prace i Materiały Instytutu Rozwoju Gospodarczego SGH; 2012, 89: Wahania cykliczne w Polsce i w strefie euro; 185-201
0866-9503
Pojawia się w:
Prace i Materiały Instytutu Rozwoju Gospodarczego SGH
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New genetic algorithm based on dissimilarities and similarities
Autorzy:
Al-Jawadi, R.
Studniarski, M.
Younus, A.
Powiązania:
https://bibliotekanauki.pl/articles/305764.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
genetic algorithm
forma analysis
similarity and dissimilarity of chromosomes
chromosome injection
Opis:
Optimization is essential for nding suitable answers to real life problems. In particular, genetic (or more generally, evolutionary) algorithms can provide satisfactory approximate solutions to many problems to which exact analytcal results are not accessible. In this paper we present both theoretical and experimental results on a new genetic algorithm called Dissimilarity and Simlarity of Chromosomes (DSC). This methodology constructs new chromosomes starting with the pairs of existing ones by exploring their dissimilarities and similarities. To demonstrate the performance of the algorithm, it is run on 17 two-dimensional, one four-dimensional and two ten-dimensional optimization problems described in the literature, and compared with the well-known GA, CMA-ES and DE algorithms. The results of tests show the superiority of our strategy in the majority of cases.
Źródło:
Computer Science; 2018, 19 (1); 23-41
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radar measures of structures’ conformability
Autorzy:
Binderman, Zbigniew
Borkowski, Bolesław
Szczesny, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/452756.pdf
Data publikacji:
2010
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
radar method
radar measure of conformability
measure of similarity
synthetic measures
classification
cluster analysis
Opis:
In the following work a new method was proposed to study similarity of objects’ structures. This method is an adaptation of radar methods of objects’ ordering and cluster analysis, which are being developed by the authors. The value added by the authors is the construction of measures for conformability of structures of two objects. Those measures may also be used to define similarities between given objects. Proposed measures are independent of the order of features.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2010, 11, 1; 45-59
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of series of measurements from job-centric monitoring by statistical functions
Autorzy:
Hilbrich, M.
Frank, M.
Powiązania:
https://bibliotekanauki.pl/articles/305830.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
job-centric monitoring
monitoring
similarity
series of measurements
statistical functions
grid
cloud
analysis
Opis:
The rising number of executed programs (jobs) enabled by the growing amount of available resources from Clouds, Grids, and HPC (for example) has resulted in an enormous number of jobs. Nowadays, most of the executed jobs are mainly unobserved, so unusual behavior, non-optimal resource usage, and silent faults are not systematically searched and analyzed. Job-centric monitoring enables permanent job observation and, thus, enables the analysis of monitoring data. In this paper, we show how statistic functions can be used to analyze job-centric monitoring data and how the methods compare to more-complex analysis methods. Additionally, we present the usefulness of job-centric monitoring based on practical experiences.
Źródło:
Computer Science; 2017, 18 (1); 3-19
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of radar charts to geometrical measures of structures’ of conformability
Autorzy:
Binderman, Zbigniew
Borkowski, Bolesław
Szczesny, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/453247.pdf
Data publikacji:
2011
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
radar method
radar measure of conformability
Dice’s Jaccard’s measure of similarity
synthetic measures
classification
cluster analysis
Opis:
In the following work we presented a method of using radar charts to calculate measures of conformability of two objects according to formulasgiven by, among others, Dice, Jaccard, Tanimoto and Tversky. This method incorporates another one presented by the authors of this study [Binderman, Borkowski, Szczesny 2010]. Presented methods can be also utilized to define similarities between given objects, as well as to order and group objects. Measures described in this work satisfy the condition of stability as they do not depend on the order of studied features.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2011, 12, 1; 1-14
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of perforated panels at a scaled measurement setup
Autorzy:
Baruch, Katarzyna
Kamisiński, Tadeusz
Majchrzak, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/127955.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
scale modelling
law of similarity
dimensional analysis
orifice
miniaturization
modelarstwo redukcyjne
prawo podobieństwa
analiza wymiarowa
otwór
miniaturyzacja
Opis:
In the paper, the authors present an ongoing research on the absorption and measurement uncertainty of perforated panels made at different scales. Knowing the similarity criteria describing the relation between a full-size perforated panel and its scaled equivalent, it is possible to conduct the measurements of the elements of significantly reduced size - with an area not exceeding 0.2 m2. This procedure notably decreases the costs resulting from the production, transportation and storing the measurement samples. At the same time, the obtained values of sound absorption coefficient measured for the samples at 1:8 scale will characterize their full-size equivalents of geometry changed according to the derived similarity criteria. The paper discusses the possibilities of measurement of scaled samples.
Źródło:
Vibrations in Physical Systems; 2019, 30, 1; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radar coefficient of concentration
Autorzy:
Binderman, Zbigniew
Borkowski, Bolesław
Szczesny, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/453724.pdf
Data publikacji:
2012
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
Gini index
Schutz’s measure
radar coefficient of concentration
radar method
radar measure of conformability
measure of similarity
synthetic measures
classification
cluster analysis
Opis:
In the following work we have described a process of using radar charts to measure concentration of a distribution. The process utilises the idea of Gini index based on a Lorenz curve as well as a method presented by the authors in [Binderman, Borkowski, Szczesny 2010]. The presented technique can also be used by analysts to create new coefficients of concentration based on measures of similarity and dissimilarity of objects so that from the set of constructed coefficients one that best fulfils the required criteria of sensitivity can be chosen.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2012, 13, 2; 7-21
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
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