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Wyświetlanie 1-15 z 21
Tytuł:
The application of Boolean algebra in modelling of leakage condition of a car hydraulic braking system
Autorzy:
Idzikowski, A.
Salamon, S.
Powiązania:
https://bibliotekanauki.pl/articles/265849.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
układ hamulcowy
układ hydrauliczny
wyciek
algebra Boole'a
modelowanie
braking system
hydraulic circuit
leakage
Boolean algebra
modelling
Opis:
A general characteristics of a car hydraulic braking system (CHBS) is presented in this publication. A graphical model of properties-component objects is developed for the above-mentioned system. Moreover, four mathematical models in terms of logic, the set theory and the Boolean algebra of Boolean functions are developed. The examination is ended with a general model of the CHBS for n - Boolean variables and the construction and mathematical-technical interpretation of this model is presented.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 353-363
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical model for the diagnostics of vehicle hydraulic braking system leakage
Model matematyczny procesu diagnozowania nieszczelności hydraulicznego samochodowego układu hamulcowego
Autorzy:
Idzikowski, A.
Salamon, S.
Powiązania:
https://bibliotekanauki.pl/articles/263756.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
brake system
hydraulic circulation
double-sequence brake master cylinder
leakage
modeling
układ hamulcowy
obieg hydrauliczny
dwusekwencyjna pompa hamulcowa
nieszczelność
Opis:
The purpose of the diagnostic tests is to specify the technical condition of an object or process at a moment deemed as important. This specification is necessary in order to compare the actual momentary condition with the model condition, make a judgement on the applicability or inapplicability of the technical object. The publication includes the technical and structural characteristics of the hydraulic braking system (HSUH). The mathematical model of the system's leakage diagnostics process was developed on the basis of the laws of logic and the set theory, including: front axis brake master cylinder chamber (KPHP), right hydraulic sub-circuit (outside the brake master cylinder) of front brakes PPHP), left hydraulic sub-circuit (outside the brake master cylinder) of front brakes (LPHP), rear axis brake master cylinder chamber(KPHT), right hydraulic sub-circuit (outside the brake master cylinder) of rear brakes (PPHT), left hydraulic sub-circuit (outside the brake master cylinder) of rear brakes (LPHT).
W miarę upływu czasu każde urządzenie (obiekt techniczny) znajduje się w określonym stanie technicznym. Badania diagnostyczne mają na celu określenie stanu technicznego obiektu lub procesu w chwili uznanej za ważną. Określenie to jest potrzebne, aby przez porównanie stanu rzeczywistego – chwilowego ze stanem wzorcowym, wydać orzeczenie o zdatności lub niezdatności obiektu technicznego. W publikacji przedstawiono charakterystykę techniczno-konstrukcyjną hydraulicznego układu hamulcowego (HSUH). Skonstruowano model matematyczny procesu diagnozowania nieszczelności tegoż układu, oparty na prawach logiki i teorii mnogości, obejmujący: komorę pompy hamulców osi przedniej (KPHP), prawy pozapompowy podobieg hydrauliczny hamulców przednich (PPHP), lewy pozapompowy podobieg hydrauliczny hamulców przednich (LPHP), komora pompy hamulców osi tylnej (KPHT), prawy pozapompowy podobieg hydrauliczny hamulców tylnych (PPHT), lewy pozapompowy podobieg hydrauliczny hamulców tylnych (LPHT). Przedstawione w artykule wyniki otwierają nowe możliwości w projektowaniu diagnozera napędów maszyn poprzez modelowanie symptomu szczelności układu sterowania hamulca.
Źródło:
Archiwum Motoryzacji; 2013, 3; 13-23, 97-107
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cyclic flow shop scheduling problem with two-machine cells
Autorzy:
Bożejko, W.
Gnatowski, A.
Idzikowski, R.
Wodecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/229393.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
job shop
cyclic scheduling
multi-machine
assignment
Opis:
In the paper a variant of cyclic production with setups and two-machine cell is considered. One of the stages of the problem solving consists of assigning each operation to the machine on which it will be carried out. The total number of such assignments is exponential. We propose a polynomial time algorithm finding the optimal operations to machines assignment.
Źródło:
Archives of Control Sciences; 2017, 27, 2; 151-167
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Agile approach in a transforming organization, a descriptive study of chosen Polish companies with rapid revenue growth
Autorzy:
Idzikowski, Wojciech
Perechuda, Igor
Powiązania:
https://bibliotekanauki.pl/articles/18864540.pdf
Data publikacji:
2018
Wydawca:
Instytut Badań Gospodarczych
Tematy:
agile approach
business processes
strategic management
business transformation
Opis:
Research background: Recent decades may undoubtedly be deemed as a period of exceptional transformation on a global scale. One element of this transformation is the reorganisation of traditional ways of business management (on all ontological levels). As a result, agile approach is increasingly often considered one of the key aspects of building the competitive advantage of a company. In this paper, agile approach is understood as the businesses' capability of responding promptly to market needs. Purpose of the article: The aim of this paper is to present the research results on the use of agile approach in chosen organizations. More specifically, the main purpose of this article is to describe how organizations are transformed with use of the agile approach. Methods: In accordance with the goal of the article, the organizations selected for empirical research are characterized by revenue increase levels of over 100% (such organizations undergo a dynamic transformation caused by growth), and employment ranging from 10 to 50 employees. The studied companies operate mainly in the IT industry and use technologies to organize the processes of identification and tracking of customer behaviour to a large extent. Several research methods were used in this paper: literature studies, expert interview, participant observation, and Spearman's rank correlation coefficient. Findings & Value added: The article describes the usage level of the agile (and linear) approach in the organizational transformation (through the dynamic growth of revenues), and presents the agile approach model, which can be used as an accelerator of the business' development. In addition, the authors undertook the first (limited and unrepresentative) attempt to evaluate the use of agile approach in the context of such indicators as: communication with customers, profit increase, and minimization of the risk related to introducing a new product on the market.
Źródło:
Oeconomia Copernicana; 2018, 9, 3; 461-475
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of magnetic properties during annealing of Hf₂Co₁₁B amorphous alloy
Autorzy:
Musiał, A.
Śniadecki, Z.
Idzikowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/1050942.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Ww
75.60.Nt
75.50.Kj
Opis:
Influence of heat treatment on magnetic properties of amorphous Hf₂Co₁₁B alloy was investigated. Hard magnetic phase, characterized by high magnetic anisotropy, appears during crystallization. The highest coercive field equal to 1.86 kOe, was obtained for sample annealed in third crystallization stage. Longer heat treatment at T_{a} = 650°C leads to decrease in coercive field, which can be the result of excess of the HfCo₃B₂ phase volume fraction and additionally eutectoid transformation of hard magnetic phase into soft magnetic Co₂₃B₆ and fcc-Co. Decrease of volume fraction of hard phase is confirmed by the remanence ratio m_{r}. Value of m_{r}, for T_{a} = 650°C, is decreasing with annealing time from 0.4 to 0.27 for 30 min and 120 min, respectively. The magnetocrystalline anisotropy constant K₁ increases from 2.23 Merg/cm³ for the amorphous ribbon to 15.84 Merg/cm³ for the sample annealed at 650°C for 30 min.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 786-788
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semi-Empirical Modelling of Glass Forming Ranges for Y-Co-Si System
Autorzy:
Śniadecki, Z.
Narojczyk, J.
Idzikowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/1366620.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.70.-a
61.43.Dq
81.30.Bx
Opis:
Glass forming abilities of a ternary Y-Co-Si system were determined on the basis of combined semi-empirical Miedema's and geometric models. The enthalpy of amorphous and solid solution phases formation, along with the mismatch entropy and GFA parameter, were analysed to indicate compositions with the highest ability for the amorphization. The large atomic radii difference between constituents, especially Y and Si, is the deciding factor of GFA. Compositions ranged between $Y_{33}Si_{67}$ and $Y_{45}Si_{55}$ are the best glass formers.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 62-63
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety of road roller technical operation through diagnosis
Autorzy:
Doudkin, Mikhail V.
Idzikowski, Adam
Kim, Alina I.
Przystupa, Franciszek W.
Powiązania:
https://bibliotekanauki.pl/articles/88471.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
diagnosis
modelling
static contact of a roller with a compacted layer
diagnostyka
modelowanie
Opis:
Safety of road roller technical operation for safety diagnosis will be analysed. The analysis is based on the assumptions and hypotheses confirmed by fundamental-applied and experimental-theoretical works. Such modelling enables formulating commonly known diagnostic equivalent for building a real diagnose method of contacting problems of moving roller contacted with the road material.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 332-342
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystallization Processes of $R_{4.5}Fe_{77}B_{18.5}$ (R = Pr, Nd) Amorphous Alloys
Autorzy:
Musiał, A.
Śniadecki, Z.
Pagnani, D.
Idzikowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/1371300.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
65.60.+a
75.50.Bb
Opis:
The amorphous alloys $R_{4.5}Fe_{77}B_{18.5}$ (R=Pr, Nd) were prepared by melt-spinning technique under argon atmosphere on a cooper wheel rotating with surface velocity of 25 m·$s^{-1}$. The ribbons have been investigated by means of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Temperatures of crystallization for $Pr_{4.5}Fe_{77}B_{18.5}$, measured at the heating rate 20 K/min, are equal $T_{x1}$=591°C for the first exothermic effect and $T_{x2}$=603°C for the second one (for $Nd_{4.5}Fe_{77}B_{18.5} T_{x1}$=594°C and $T_{x2}$=633°C). In the amorphous ribbons the crystallization of $Fe_{3}B$ phase in the first step, followed by the crystallization of $Pr_{2}Fe_{23}B_{3}$ and $Nd_{2}Fe_{23}B_{3}$, was observed. Both later phases appear in the process of recrystallization, immediately after $Fe_{3}B$ formation.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 316-317
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Giant Magnetoresistance in Melt-Spun Co-Cu Modified by Rare Earths
Autorzy:
Idzikowski, B.
Rössler, U. K.
Handstein, A.
Nenkov, K.
Müller, K.-H.
Powiązania:
https://bibliotekanauki.pl/articles/2013425.pdf
Data publikacji:
2000-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Pa
75.50.Tt
Opis:
Samples of the composition RE$\text{}_{x}$Co$\text{}_{20}$Cu$\text{}_{80-x}$, RE = Sm, Gd or Dy (x = 0, 1, and 3) were produced by melt-spinning and subsequent annealing. The magnetoresistance is negative as in granular Co-Cu, but its values depend on the kind of rare earth element added and on changes in the microstructure induced by thermal annealing. An addition of 1 at.% rare earth metal to Co$\text{}_{20}$Cu$\text{}_{80}$ yields a considerable increase in the magnetoresistance ratio, whereas an addition of 3 at.% causes a decrease. E.g., by addition of 1 at.% Dy to Co$\text{}_{20}$Cu$\text{}_{80}$ and optimal thermal treatment, the value of magnetoresistance ratio measured at 10 K in a field of 5 T increases from -14% to -28%. The effect can be attributed to the presence of clusters of hexagonal Dy(Co,Cu)$\text{}_{5}$, which was ascertained from X-ray diffraction data, or other, metastable rare-earth compounds and paramagnetic rare-earth atoms in the Cu matrix.
Źródło:
Acta Physica Polonica A; 2000, 97, 5; 791-794
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystalline Structure, Stoichiometry and Magnetic Properties of the Morasko Meteorite
Autorzy:
Idzikowski, B.
Kováč, J.
Diko, P.
Stankowski, W.
Muszyński, A.
Powiązania:
https://bibliotekanauki.pl/articles/1535541.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
91.65.Sn
75.50.Bb
67.80.dk
Opis:
The composition and structure of iron-nickel alloys smithereens extracted from the Morasko (Poland) Meteorite (fell ∿ 5 ka BP) were investigated by optical metallographic techniques, scanning electron microscopy and electron microprobe analysis, thermal analyses, magnetic measurements and X-ray diffraction. Microstructural analysis by scanning electron microscopy and optical microscopy has shown that the sample is composed from large grains of Fe-Ni alloy in which secondary phase crystals with well developed crystal habits and the size about 10 micrometers are distributed. Thermal analyses confirmed that the transformation from alpha to gamma Fe-Ni solid solution appearing as a function of temperature corresponds to about 5 wt% Ni in the Fe-Ni alloy. Possible scenario of the extraterrestrial sample solidification is related to the microstructural and magnetic behavior.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 1071-1073
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Composition and Temperature Dependence of Giant Magnetoresistance in Melt-Spun Co_{x}Cu_{100-x} Ribbons
Autorzy:
Idzikowski, B.
Nenkov, K.
Handstein, A.
Hütten, A.
Müller, K. H.
Powiązania:
https://bibliotekanauki.pl/articles/1964599.pdf
Data publikacji:
1997-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Pa
72.15.Eb
81.40.Rs
Opis:
Structure, magnetic properties and magnetoresistance in as-quenched and annealed Co$\text{}_{x}$Cu$\text{}_{100-x}$ samples were investigated. Homogeneous metastable Co$\text{}_{x}$Cu$\text{}_{100-x}$ alloys were prepared by the single-roller technique. The maximum value of magnetoresistance is shifted to higher annealing temperatures with increasing measuring temperature. At higher measuring temperatures the magnetoresistance is not saturated in fields as high as 16 T. Susceptibility measurements showed the formation of hcp-structured Co clusters. For small cobalt concentrations there is a transition from giant magnetoresistance to the normal anisotropic magnetoresistance.
Źródło:
Acta Physica Polonica A; 1997, 92, 2; 307-310
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economy and energy analysis in the operation of renewable energy installations – a case study
Autorzy:
Idzikowski, Adam
Cierlicki, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1839542.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
panel fotowoltaiczny
odnawialne źródła energii
falownik
solar panel
renewable sources of energy
inverter
Opis:
In the paper an economic, ecological and energy analysis of a home photovoltaic on grid installation was presented. The increase in ecological awareness of the Polish society contributes to the continuous growth of interest in green energy. However, many people haven’t been aware of the ecological, economic and energy benefits of photovoltaic installations yet, so the following analysis is made. The analysis concerns a photovoltaic installation with a capacity of 3.96 kWp located in Ościęciny near Włocławek. The photovoltaic installation consists of 11 monocrystalline panels with a power of 360 Wp, a 4 KTLM Sofar Solar inverter and other necessary components. The first part presents basic issues related to photovoltaic installations. Parameters related to the proper functioning of the photovoltaic installation were replaced. The analysis of the literature will help to understand the essence of the proper functioning of the photovoltaic installation. In the practical part, an analysis of a selected home photovoltaic installation was carried out. Based on the available data, it has been calculated that the installation will have a payback period of over 9 years. The photovoltaic installation will produce approximately 3 582.61 kWh of electricity and will contribute to the reduction of 70 tons of carbon dioxide during the entire operation.
Źródło:
Production Engineering Archives; 2021, 27, 2; 90-99
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The management of the technological process of a product on the example a shrink film in the aspect life cycle assessment
Autorzy:
Idzikowski, Adam
Walichnowska, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/23944752.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
management
technological process
LCA
life cycle assessment (LCA)
zarządzanie
proces technologiczny
ocena cyklu życia (LCA)
Opis:
Nowadays Life Cycle Assessment is the most popular tool that can be used to see environmental load of a machine, a product or a process. LCA defines the impact throughout the life of a product, from the extraction or production of raw material from natural resources, through production, use and final disposal. This method focuses on the assessment of the impact of the tested object on the area of the ecosystem, human health and the resources use. LCA is a very helpful tool in the environmental assessment that is required and results from the current policy of the European Union, which requires the member states to minimize the harmful impact on the environment of every aspect of human life. The publication discusses the LCA life cycle assessment method as one of the methods allowing to estimate the environmental impact of a technological process or some product. The article shows also the history of LCA, the individual stages, advantages and disadvantage this method. This paper it is also an introduction to carry out LCA analysis on the example of a process with the use of the shrink film.
Źródło:
System Safety : Human - Technical Facility - Environment; 2022, 4, 1; 1-9
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of optimizing the supply chain on the example of a selected enterprise
Autorzy:
Kuryło, Piotr
Cyganiuk, Joanna
Michalski, Dariusz
Idzikowski, Adam
Sobczyńska-Linke, Anna
Powiązania:
https://bibliotekanauki.pl/articles/88492.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
logistics network
supply chain
optimization
sieć logistyczna
łańcuch dostaw
optymalizacja
Opis:
To consider the optimization of the supply chain, a company operating in the cosmetics and hygiene industry was selected. It is a typical production company with foreign capital, working on entrusted material which entirely belongs to the parent company. The company management, purchasing and sales department are located at the parent company, the Polish branch is entrusted only with production and direct distribution of finished goods. The purpose of the work is to present the applied logistic solutions, characterize and analyse the existing supply chain and to propose actions to optimize currently used methods.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 607-615
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pressure Effect on Yb-Based Strongly Correlated Electron Systems
Autorzy:
Mito, T.
Otani, M.
Nakamura, M.
Koyama, T.
Wada, S.
Kotegawa, H.
Kobayashi, T.
Idzikowski, B.
Reiffers, M.
Sarrao, J.
Powiązania:
https://bibliotekanauki.pl/articles/1810284.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.27.+a
75.30.Kz
75.30.Mb
76.60.-k
Opis:
We studied pressure effects on $YbCu_5$ and $YbInCu_4$, good examples of the Yb-based compounds to investigate the nonmagnetic-magnetic transition in Yb-based strongly correlated electron systems. With increasing pressure, the low-temperature Fermi liquid state of $YbCu_5$ is gradually suppressed, suggesting the second-order like nonmagnetic-magnetic transition around the pressure of 5-6 GPa. On the other hand, in $YbInCu_4$ which has a pressure-induced magnetic ordered ground state above $P_C$=2.45 GPa, both high-temperature paramagnetic and low-temperature intermediate valence phases are insensitive to pressure. Our results confirm the first-order nature of the transition between the intermediate valence and magnetic ordered phases with pressure.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 47-52
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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