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Tytuł:
Analysis of the compromise between cutting tool life, productivity and roughness during turning of C45 hardened steel
Autorzy:
Abidi, Youcef
Powiązania:
https://bibliotekanauki.pl/articles/1839561.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
obróbka twarda
zużycie narzędzi
produktywność
chropowatość powierzchni
korelacja
hard machining
tool wear
productivity
surface roughness
correlation
Opis:
Tool wear and surface roughness as performance indexes are considered to be the most important in terms of hardened materials’ machinability. The best combination of cutting parameters which enhances the compromise between tool life, productivity and machined surface quality contribute to benefice on production cost, which makes manufacturing industry interested in it. The aim of this research is to investigate the life of ceramic cutting tool and machining productivity together with surface roughness during turning of hardened steel C45, with focus on the selection of the optimal cutting parameter combination. The experiments are carried out based on uni-factorial planning methodology of cutting speeds and feed rates. The results show that the mixed ceramic tool is suitable for turning hardened steel C45 (40 HRC) and the conclusion is that it performed well in terms of tool life, productivity and surface quality at a combination of cutting speed (200 m/min), feed (0.08 mm/rev) and depth of cut (0.3 mm). Additionally, a tool life model has been proposed which is presented very high coefficient of determination.
Źródło:
Production Engineering Archives; 2021, 27, 1; 30-35
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between surface roughness and chip morphology when turning hardened steel
Autorzy:
Abidi, Youcef
Powiązania:
https://bibliotekanauki.pl/articles/1839509.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
hard machining
AISI 1045 steel
ceramic tool
chip
surface roughness
obróbka twarda
stal AISI 1045
narzędzie ceramiczne
żeton
chropowatość powierzchni
Opis:
Hard machining is a process which has become highly recommended in manufacturing industry to replace grinding and perform production. The important technological parameters that determine this process are tool wear, machined surface roughness, cutting force and morphology of the removed chip. In this work, an attempt has been made to analyse the morphology and form of chip removed during turning of hardened steel AISI 1045 (40HRC) with mixed ceramic tool type CC650. Using a Taguchi plan L9, whose factors are cutting speed and feed rate with three levels for each. Macroscopic and microscopic results of chip morphology were correlated with these two cutting parameters additional to surface roughness. Sufficient experimental results were obtained using the mixed ceramic tool when turning of hardened steel AISI 1045 (40HRC) at high cutting speeds. Roughness of machined surface confirmed that it is influenced by feed rate. Chips show a sawtooth shape for all combinations of the experimental plan used. The chip form changed with cutting parameters variation and given an important indicator of suraface quality for industriel. Having the indicators on the surface quality from simple control of chip without stopping machining give an important advantage in order to maximize production and reduce costs.
Źródło:
Production Engineering Archives; 2020, 26, 3; 92-98
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozwój narzędzi cyfrowych a procesy projektowania i produkcji
Development of digital tools in the context of design and production processes
Autorzy:
Achramowicz, Radosław
Powiązania:
https://bibliotekanauki.pl/articles/128889.pdf
Data publikacji:
2020
Wydawca:
PWB MEDIA Zdziebłowski
Tematy:
architektura
wzornictwo przemysłowe
narzędzie cyfrowe
projektowanie
animacja
kastomizacja
produkcja
architecture
industrial design
digital tool
designing
animation
castomisation
production
Opis:
Współcześnie w obszarze architektury i wzornictwa przemysłowego następuje odejście od tradycyjnie pojmowanych pojęć funkcji, formy, procesów produkcyjnych, na rzecz zainteresowania elastycznością samoorganizacją, prototypizacją. Towarzyszą temu zmiany możliwe dzięki wykształceniu się nowych narzędzi cyfrowych, wywodzących się z przemysłu samochodowego, lotniczego czy technik animacji. Narzędzia owe od ponad trzech dekad są obecne w twórczym etapie procesu projektowania, z jednej strony sprzyjając przenikaniu się architektury i wzornictwa przemysłowego, z drugiej przyczyniając się do erozji dotychczasowych zasad nimi rządzących. Dziś możemy więc sobie zadać pytanie, na ile zamierzamy być cyfrowi, a na ile nie? Z odpowiedzią wiąże się wiele konsekwencji redefiniujących architekturę i design – dyscypliny bliźniacze.
Nowadays, in the field of architecture and industrial design, there is a departure from traditionally understood concepts of functions, forms, production processes in favor of interest in flexibility, self-organization and prototyping. This is accompanied by changes, possible thanks to the emergence of new digital tools originating from the automotive, aviation and animation industries. These tools have been present in the creative phase of the design process for over three decades, on the one hand, favoring the interpenetration of architecture and industrial design, on the other, contributing to the erosion of existing rules governing them. So today we can ask ourselves: how far digital we would like to go and where to stop? There are many consequences associated with the answer to this question that redefine twin disciplines – architecture and design.
Źródło:
Builder; 2020, 24, 2; 38-39
1896-0642
Pojawia się w:
Builder
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical validation of the method for measuring radius variations of components on the machine tool
Autorzy:
Adamczak, S.
Janusiewicz, A.
Makieła, W.
Stępień, K.
Powiązania:
https://bibliotekanauki.pl/articles/221018.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
roundness
experimental method error
process tool
Opis:
This paper deals with the experimental validation of the suitability of the method for measuring radial variations of components on the process tool. The tests were conducted using a computerized PSA6, which was compared to a Talyrond 73. The results of measurement of roundness deviations as well as roundness profiles were analyzed for a sample of 70 shafts. The roundness deviations were assessed by determining the experimental errors, while the profiles obtained with the tested device were compared to those registered by the reference device using three correlation coefficients.
Źródło:
Metrology and Measurement Systems; 2011, 18, 1; 35-46
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wear and surface characteristics on tool performance with CVD coating of Al2O3/TiCN inserts during machining of Inconel 718 alloys
Autorzy:
Agari, Shailesh Rao
Powiązania:
https://bibliotekanauki.pl/articles/2065755.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chip morphology
tool wear
surface roughness
superalloy
Inconel 718
zużycie narzędzia
chropowatość powierzchni
nadstop
Opis:
The Inconel 718 alloys, which are primarily temperature resistant, are widely used in aviation, aerospace and nuclear industries. The study on dry cutting processes for this alloy becomes difficult due to its high hardness and low thermal conductivity, wherein, most of the heat transfers due to friction are accumulated over the tool surface. Further, several challenges like increased cutting force, developing high temperature and rapid tool wear are observed during its machining process. To overcome these, the coated tool inserts are used for machining the superalloys. In the present work, the cemented carbide tool is coated with chemical vapor deposition multi-layering Al 2O 3/TiCN under the dry cutting environment. The machining processes are carried out with varying cutting speeds: 65, 81, 95, and 106 m/min, feed rate 0.1 mm/rev, and depth of cut 0.2 mm. The variation in the cutting speeds can attain high temperatures, which may activate built-up-edge development which leads to extensive tool wear. In this context, the detailed chip morphology and its detailed analysis are carried out initially to understand the machining performance. Simultaneously, the surface roughness of the machined surface is studied for a clear understanding of the machining process. The potential tool wear mechanism in terms of abrasion, adhesion, tool chip off, delaminating of coating, flank wear, and crater wear is extensively identified during the processes. From the results, it is observed that the machining process at 81 m/min corresponds to a better machining process in terms of lesser cutting force, lower cutting temperature, better surface finish, and reduced tool wear than the other machining processes.
Źródło:
Archive of Mechanical Engineering; 2022, LXIX, 1; 59--75
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reconfigurable Machine Tool: Methodology of RMT Design
Autorzy:
Aladad, H.
D'Acunto, A.
Martin, P.
Powiązania:
https://bibliotekanauki.pl/articles/971118.pdf
Data publikacji:
2008
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
reconfigurable machine
tool machine
tool design
machining feature
process planning
Opis:
Reconfigurable Machine Tool (RMT) is the active issue to realize both the flexibility and productivity of manufacturing systems and satisfy the mass-customization production. The purpose of this paper is to present a RMT design methodology. Specifically, the part analysis and the RMT architectural modelling. The method of RMT design is focused on a simultaneous machining process using multi-spindle in a single RMT. Based on the concept of machining features, the process data, retrieved as a starting point in identifying various functions necessary to carry out a given part family, are displayed. Moreover, geometrical and kinematical architectures of RMT are defined as a result of the specification of all manufacturing processes of features to be machined. Where, all architectural solutions and the criterions related to select the suited solution are presented. Our methodology presents all activities allowing to pass from machining features of part to be machined to the structure of RMT.
Źródło:
Journal of Machine Engineering; 2008, 8, 1; 19-32
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy controller of model reduction distillation column with minimal rules
Autorzy:
Alawad, Nasir
Alseady, Afaf
Powiązania:
https://bibliotekanauki.pl/articles/118163.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
distillation column
model reduction
pi controller
fuzzy inference system
MATLAB tool
kolumna destylacyjna
redukcja modelu
kontroler pi
system wnioskowania rozmytego
narzędzie MATLAB
Opis:
In this paper the control of a binary distillation column is described. This control is done with fuzzy logic, one with PI- like fuzzy controller and the other with modified PI fuzzy controller, using the minimal rules for fuzzy processing. This work is focused on model reduction of Wood and Berry binary distillation column to get the best performance. It is desired to minimize the rules in order to reduce the computation time to make a faster decision. Comparisons will be made between two versions of fuzzy controllers utilizing reduced rules to verify the outputs. The controlled variables are top composition with high concentration and bottom composition with low. To demonstrate the performance of the fuzzy PI control schemes, results are compared with a classical PI controller and optimal methods, like Differential Evolution (DE), Invasive Weed Optimization (IWO). The proposed structure is able to quickly track the parameter variation and perform better in load disturbances and also for set point changes. Then all the processes of the distillation column with itۥ s fuzzy controllers are simulated in MATLAB software as the results are shown.
Źródło:
Applied Computer Science; 2020, 16, 2; 80-94
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of the process of restoring the continuity of the WDS based on the matrix and genetic algorithm approach
Autorzy:
Antonowicz, Ariel
Urbaniak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2173692.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
WNTR
Water Network Tool for Resilience
aggregation of failures
water distribution system
EPANET Solver
Graph Searching Algorithms
genetic algorithm
optimization
post-disaster events
agregacja awarii
system dystrybucji wody
EPANET
algorytm wyszukiwania grafów
algorytm genetyczny
optymalizacja
wydarzenia po katastrofie
Opis:
The article discusses an example of the use of graph search algorithms with trace of water analysis and aggregation of failures in the occurrence of a large number of failures in the Water Supply System (WSS). In the event of a catastrophic situation, based on the Water Distribution System (WDS) network model, information about detected failures, the condition and location of valves, the number of repair teams, criticality analysis, the coefficient of prioritization of individual network elements, and selected objective function, the algorithm proposes the order of repairing the failures should be analyzed. The approach proposed by the authors of the article assumes the selection of the following objective function: minimizing the time of lack of access to drinking water (with or without prioritization) and minimizing failure repair time (with or without failure aggregation). The algorithm was tested on three different water networks (small, medium, and large numbers of nodes) and three different scenarios (different numbers of failures and valves in the water network) for each selected water network. The results were compared to a valve designation approach for closure using an adjacency matrix and a Strategic Valve Management Model (SVMM).
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e141594
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integration of Ergonomics Into Hand Tool Design: Principle and Presentation of an Example
Autorzy:
Aptel, M.
Claudon, L.
Marsot, J.
Powiązania:
https://bibliotekanauki.pl/articles/89751.pdf
Data publikacji:
2002
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
hand tool
ergonomic
design
ergonomia
projektowanie sprzętu
narzędzia ręczne
Opis:
The development of ergonomic tools responds to health protection needs on the part of workers, especially the work related musculoskeletal disorders of the upper limbs and to the development of ergonomic tools to take into account the needs of the factories. Only an ergonomic design process can enable tool manufacturers to meet these requirements. Three factors are involved: integration of ergonomics into the design process, definition of the different ergonomic stages involved, and finally knowledge of the different factors involved in hand tool design. This document examines these 3 elements in more detail and presents briefly a project of research whose main purpose is to integrate ergonomic criteria into a design process.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2002, 8, 1; 107-115
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation and representation of machine tool deformations
Autorzy:
Archenti, A.
Osterlind, T.
Nicolescu, C. M.
Powiązania:
https://bibliotekanauki.pl/articles/99452.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
machine tool
testing
deformation
static stiffness
circular test
loaded double ball bar
Opis:
This paper presents a novel test concept for the evaluation of the accuracy of NC machine tools. The evaluation of machine tools deformations is performed by help of a device similar to the double ball bar (DBB) with the difference that an adjustable load generated by the devic can be applied between spindle nose and machine tool table. This load eliminates the play existing in machine tool joints, thus reproducing the testing conditions that exist during machining. Collected data are used to plot diagrams displaying characteristic aspects of machine tool performance and a number of key figures such as static stiffness may be determined. The data can also be used for trend analysis; to predict any accuracy deviations, and further to conduct preventive maintenance instead of emergency calls. The determined static behaviour could also be used to improve digital models for process simulations and compensation of errors that are caused by deflection.
Źródło:
Journal of Machine Engineering; 2011, 11, 4; 105-117
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Human Governance Problem: Complex Systems and the Limits of Human Cognition
Autorzy:
Atreides, Kyrtin
Powiązania:
https://bibliotekanauki.pl/articles/31233773.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Instytut Filozofii i Socjologii PAN
Tematy:
e-Governance
complexity
cognitive bandwidth
AGI
Artificial General Intelligence
scalability
tool AI
cognitive bias
Opis:
The impact of complexity within government and societal systems is considered relative to the limitations of human cognitive bandwidth, and the resulting reliance on cognitive biases and systems of automation when that bandwidth is exceeded. Examples of how humans and societies have attempted to cope with the growing difference between the rate at which the complexity of systems and human cognitive capacities increase respectively are considered. The potential of and urgent need for systems capable of handling the existing and future complexity of systems, utilizing greater cognitive bandwidth through scalable AGI, are also considered, along with the practical limitations and considerations in how those systems may be deployed in real-world conditions. Several paradoxes resulting from the influence of prolific Narrow Tool AI systems manipulating large portions of the population are also noted.
Źródło:
Filozofia i Nauka; 2023, 11; 37-64
2300-4711
2545-1936
Pojawia się w:
Filozofia i Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Tool Pin Profile on Friction Stir Welding of Dissimilar Materials AA5083 and AA7075 Aluminium Alloy
Autorzy:
Azmi, Muhammad Haziq
Hasnol, Muhammed Zakariya
Zaharuddin, Mohd Faridh Ahmad
Sharif, Safian
Rhee, Sehun
Powiązania:
https://bibliotekanauki.pl/articles/2106579.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
friction stir welding
aluminium alloys
tool pin
mechanical properties
Opis:
Friction stir welding (FSW) currently contributes a significant joining process for welding aluminium, magnesium, and other metals in which no molten or liquid state were involved. It is well known that aluminium alloys are more effective, promising for different applications light weight, strength and low cost. This study aims to determine how such tools geometry and tool speed can be related to dissimilar material in the joining process. Specifically, it investigates whether the distribution of the weld zone particularly between tool pin profile to rotational speed. In this context, the influence of tool pin profile and tool rotational speed in relation to the mechanical properties and microstructure of friction stir welded. The aim of this study is also to test the hypothesis that better mixing between dissimilar metals at higher tool rotational speed along the weld path. Three different tool profiles were configured with AA5083 and AA7075. During welding, notable presence of various types of defects such as voids and wormholes in the weld region. The results of this work showed that the tool pin profile and weld parameter are significant in determining mechanical properties at different tool rotational speed. The highest tensile strength achieved was about 263 MPa and the defectfree joint was obtained by using the threaded tapered cylindrical pin tool at a rotational speed of 800 rpm. These findings indicate that different tool profiles influence differently on the formation of defects at welds. On this basis, the tool geometry should be considered when designing experimental friction stir welded joint.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 465--470
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perspektivy razrabotki ehnergocberegajushhikh rabochikh organov dlja ehkologicheskogo zemledelija
Prospects of development of energy-saving working bodies for ecological agriculture
Autorzy:
Babickijj, L.
Moskalevich, V.
Powiązania:
https://bibliotekanauki.pl/articles/76899.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
development prospect
machinery
tool
ecological agriculture
energy efficiency
working body
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Police In-Between Apoliticality and Politicality
Policja pomiędzy apolitycznością a politycznością
Autorzy:
Bäcker, Roman
Powiązania:
https://bibliotekanauki.pl/articles/32304247.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
apoliticality of the police
politicality of the police
Weber’s theory of bureaucracy
patronage system
theoretical tool
apolityczność policji
polityczność policji
weberowska teoria biurokracji
system patronażu
narzędzie teoretyczne
Opis:
The paper aims to construct a theoretical tool that allows for possible precise location of relations between the police and the ruling elite in a given country. Their relationship is between the ideal types of apoliticality and politicality. The five stages of the relationship between the ruling elite and the bureaucracy on a continuum between the ideal type of the apolitical Weberian bureaucracy and its antinomic ideal type of politicised system of patronage can be arranged as follows: self-regulation, personal independence, uncertainty, loyalty, and enhanced loyalty. The empirical usefulness test of these stages scheme consisting in the case study of one state characterised by a large range of autocratic and democratic regimes evolution (thus post-war Poland) was positive. Relations between the police, or more precisely: the Citizens’ Militia, in the period of the Polish People’s Republic can be defined as being at the stage of enhanced, double loyalty. In the period of the Third Polish Republic, relations between the police and the ruling elites can be placed at the fourth stage – loyalty. The few attempts to change this type of relationship and move to the stage of self-regulation or personal independence remained at the level of ineffective and temporary attempts at best.
Celem tekstu jest skonstruowanie narzędzia teoretycznego pozwalającego na tak precyzyjne, jak tylko to możliwe usytuowanie relacji w danym państwie pomiędzy policją a elitą rządzącą. Relacje pomiędzy policją a elitą rządzącą mieszczą się pomiędzy typem idealnym apolityczności a typem idealnym polityczności. Pięć etapów relacji elit rządzących z biurokracją na continuum pomiędzy typem idealnym apolitycznej Weberowskiej biurokracji a antynomicznym mu typem idealnym upolitycznionym systemem patronażu można uszeregować następująco: samoregulacji, niezależności personalnej, niepewności, lojalności i wzmocnionej lojalności. Test empirycznej przydatności schematu powyższych pięciu etapów polegający na analizie przypadku jednego państwa charakteryzującego się dużą rozpiętością ewolucji reżimów autokratycznego i demokratycznego (a więc powojennej Polski) wypadł pozytywnie. Relacje między policją, a dokładniej: Milicją Obywatelską, w okresie PRL-u można zdefiniować jako znajdujące się na etapie wzmocnionej, bardziej precyzyjnie: podwójnej, lojalności. W okresie III RP relacje pomiędzy policją a elitami rządzącymi można usytuować na etapie czwartym – lojalności. Nieliczne próby zmiany tego typu relacji i przejścia na etap samoregulacji lub niezależności personalnej pozostawały na poziomie w najlepszym przypadku nieskutecznych i tymczasowych prób.
Źródło:
Przegląd Politologiczny; 2022, 4; 5-15
1426-8876
Pojawia się w:
Przegląd Politologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent controll of the gripping force of an object by two computer-controlled cooperative robots
Autorzy:
Bahani, Abderrahim
Ech-Chhibat, El Houssine
Samri, Hassan
Ait El Attar, Hicham
Ait Maalem, Laila
Powiązania:
https://bibliotekanauki.pl/articles/30148272.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
cooperative robotic system
handling force
MANFIS controller
object-tool contact
Opis:
This paper presents a method based on Multiple Adaptive Neuro-Fuzzy Inference System (MANFIS) to regulate the handling force of a common object. The foundation of this method is the prediction of the inverse dynamics of a cooperative robotic system made up of two 3-DOF robotic manipulators. Considering the lack of slippage in the contact between the tool and the object, the object is moved. To create and feed the MANFIS database, the inverse kinematics and dynamic equations of motion for the closed chain of motion for both arms are established in Matlab. Results from a SimMechanic simulation are given to demonstrate how well the suggested MANFIS controller works. Several manipulated object movements covering the shared work¬space of the two manipulator arms are used to test the proposed control strategy. The simulation results indicate that the proposed control strategy is effective in regulating the handling force of a common object with varying desired forces, and does not require the use of force sensors on the object-tool contact.
Źródło:
Applied Computer Science; 2023, 19, 1; 133-151
1895-3735
2353-6977
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł

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