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Tytuł:
New machine learning methods for prediction of protein secondary structures
Autorzy:
Błażewicz, J.
Łukasiak, P.
Wilk, S.
Powiązania:
https://bibliotekanauki.pl/articles/969728.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
machine learning
prediction of protein structures
LAD
LEM2
MODLEM
Opis:
The first and probably the most important step in predicting the tertiary structure of proteins from its primary structure is to predict as many as possible secondary structures in a protein chain. Secondary structure prediction problem has been known for almost a quarter of century. In this paper, new machine learning methods such as LAD, LEM2, and MODLEM have been used for secondary protein structure prediction with the aim to choose the best among them which will be later parallelized in order to handle a huge amount of data sets.
Źródło:
Control and Cybernetics; 2007, 36, 1; 183-201
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Features of Aluminium Alloys 2024, 6061 and 7075 on the Properties of GLARE-Type Composites
Wpływ właściwości stopów aluminium 2024, 6061, 7075 na cechy kompozytu typu GLARE
Autorzy:
Wilk, M. S.
Śliwa, R. E.
Powiązania:
https://bibliotekanauki.pl/articles/355146.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
GLARE composites
aluminium alloy
mixing rule
kompozyty GLARE
stopy aluminium
reguły mieszania
Opis:
The above paper presents the assumptions and results of the research whose aim was to determine the influence of 2024, 6061 and 7075 aluminum alloys on the final properties of GLARE-type composites. GLARE 3 2/1 type composites, made of two layers of the epoxy prepreg, reinforced with unidirectional glass fibers, arranged in the direction of 0°/90°, and two sheets of aluminum with a thickness of 0.4 mm, were investigated. Composites of various stacking configurations of alloy layers, made of one type of aluminum alloy (so-called ‘homogeneous composites’), and two different alloys (mixed composites), were analyzed. The properties of the composites were evaluated with the use of the mixing rule and compared with the test results. The influence of the used aluminum alloys on mechanical properties of GLARE-type composites has been determined. GLARE-type composite made of 7075 alloy sheets had the most favorable mechanical properties in comparison to properties of composites with 2024 and 6061 sheets. It has been shown how the properties of GLARE-type composites depend on the type of the aluminum alloy. It has been also proved that the properties of GLARE-type composites can be evaluated with the use of the mixing rule.
W pracy przedstawiono założenia i wyniki badań, których celem było określenie wpływu właściwości zastosowanych stopów aluminium 2024, 6061 i 7075 na własności finalne kompozytów typu GLARE. Analizie poddano kompozyty typu GLARE 3 2/1 wykonane z dwóch warstw prepregu epoksydowego, zbrojonego włóknem szklanym, ułożonego w kierunku 0°/90°, oraz z dwóch arkuszy stopu aluminium o grubości 0,4 mm. Przeanalizowano kompozyty o różnych konfiguracjach ułożenia warstw stopów, składające się z jednego gatunku stopu aluminium (tzw. kompozyty jednorodne), oraz z dwóch różnych stopów (kompozyty mieszane). Własności kompozytów oszacowano na podstawie reguły mieszania i porównano je z wynikami badań. Określono wpływ zastosowanego stopu aluminium na własności wytrzymałościowe kompozytów typu GLARE. Najkorzystniejsze własności wytrzymałościowe wykazał kompozyt z udziałem arkuszy stopu 7075 w stosunku do właściwości kompozytów z udziałem arkuszy blach stopów 2024 oraz 6061. Określono jak właściwości kompozytu typu GLARE zależą od rodzaju zastosowanego stopu aluminium. Wykazano również, że cechy kompozytów typu GLARE można oszacować na podstawie reguły mieszania.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 4; 3101-3108
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the flow characteristic of a high-rotational centrifugal pump by means of CFD methods
Autorzy:
Dykas, S.
Wilk, A.
Powiązania:
https://bibliotekanauki.pl/articles/1943238.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska
Tematy:
centrifugal pump
CFD modeling
flow characteristic
Opis:
The paper refers to a numerical analysis of the flow through a centrifugal pump working at high rotational speed. This kind of a pump is characterized by a high delivery head and a low discharge. The considered pump is a one-stage centrifugal pump with a rotational speed of 12 000 rpm. This pump has been manufactured and prepared for experimental research. The main purpose of the presented research has been to determine the flow characteristic of the pump by means of CFD methods. To this end the commercial CFD code, ANSYS CFX 11, has been used. The obtained numerical results have shown high usefulness of the CFD methods for the flow machinery design process. In the next step the obtained flow characteristic will be compared with the experimental investigations.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2008, 12, 3-4; 245-253
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Waterway of the Middle Vistula (Wisła) and the Bug
Autorzy:
Kuźniar, P.
Pisarczyk, S.
Wilk, E.
Powiązania:
https://bibliotekanauki.pl/articles/260508.pdf
Data publikacji:
2006
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
shipping
inland waterways
Opis:
In this paper was characterized the fragment of the east-west waterway from Płock to Terespol, composed of the section of the Vistula measured from 633rd kilometer (the backwater end of Włocławek Reservoir) to 520th km (Warsaw), Żerań Canal including a fragment of Zegrze Reservoir and the lower part of the Bug up to 282nd km (Terespol). Hydrological and geomorphologic conditions of both sections of the river-beds and the state of their regulation infrastructure were presented in the aspect of existing navigation conditions and causes of their limitations. It was stated that both the river-beds, i.e of the Vistula and the Bug over their analyzed sections, have not fulfilled the requirements determined by the waterway classification standards.
Źródło:
Polish Maritime Research; 2006, S 2; 13-17
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of selected food intake frequency in patients with type 1 diabetes treated with personal insulin pumps
Autorzy:
Krzyzowska, S.
Matejko, B.
Kiec-Wilk, B.
Wilk, M.
Malecki, M.
Klupa, T.
Powiązania:
https://bibliotekanauki.pl/articles/875073.pdf
Data publikacji:
2019
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Background. It has been established that in Type 1 Diabetes Mellitus (T1DM), regardless of the insulin therapy model used, diet and proper eating habits are still important in the treatment of the disease. The dietary intervention in these patients is aimed at maintaining proper body weight, obtaining target fasting and post meal blood glucose levels, optimizing lipid profiles. Objective. The aim of the study was to assess dietary habits in a homogeneous group of adults with T1DM treated with personal insulin pumps. Material and methods. The study included 141 adult patients (57% women) with type 1 diabetes treated with personal insulin pumps. The surveyed population was characterized by an average age of 25.8 ± 6.2 years, an average duration of diabetes 13.9 ± 6.9 years, and treatment with a personal pump for 8.2 ± 4.1 years and mean BMI 23.0 ± 2.8 g/m2. All were dwellers of south-eastern Poland. The validated KomPAN questionnaire was used to assess the frequency of consumption of individual food products. Results. The mean percentage of HbA1c in the study group was 7.3% [56 mmol/mol]. The mean total cholesterol level was 4.4 mmol/l, HDL - 1.7 mmol/l, LDL - 2.3 mmol/l and triglycerides - 0.8 mmol/l. In the multivariate regression model, no correlation was found between dietary quality parameters and metabolic compensation measured with HbA1c or lipidogram and the place of residence (village, small town, big city). However, there were differences in the quality of the diet depending on the sex. Women were characterized by higher index of a healthy diet (pHDI-10) (26.3 vs 21.4, p=0.005) and lower index of unhealthy diet (nHDI-14) (13.3 vs 18.6, p <0.001) than men. Conclusions. The results of this study clearly suggest, that despite good metabolic control, patients require more education on the choice of healthy product groups.
Wprowadzenie. Uważa się, że w cukrzycy typu 1 (T1DM), niezależnie od zastosowanego modelu insulinoterapii, dieta i prawidłowe nawyki żywieniowe są kluczowe w leczeniu cukrzycy. Stosowanie odpowiedniej diety ma na celu utrzymanie prawidłowej masy ciała, uzyskanie prawidłowego poziomu glukozy we krwi po posiłku, optymalnego profil lipidowy i prawidłowe wartości ciśnienia krwi. Cel. Celem badania była ocena diety i kontrola metaboliczna w homogennej grupie osób dorosłych z T1DM leczonych osobistymi pompami insulinowymi. Materiał i metody: Badaniem objęto 141 dorosłych pacjentów (57% kobiet) z cukrzycą typu 1 leczonych osobistymi pompami insulinowymi. Badana populacja charakteryzowała się średnim wiekiem 25,8 ± 6,2 lat, średnim czasem trwania cukrzycy 13,9 ± 6,9 lat oraz średnim czasem leczenia osobistą pompą przez 8,2 ± 4,1 lat i średnim BMI 23,0 ± 2,8 g / m2. Wszyscy byli mieszkańcami południowo-wschodniej Polski. Walidowany kwestionariusz KomPAN wykorzystano do oceny częstotliwości spożycia poszczególnych produktów spożywczych. Wyniki. Średni odsetek HbA1c w grupie badanej wynosił 7,3% [56 mmol/mol]. Średni poziom całkowitego cholesterolu wynosił 4,4 mmol / l, HDL - 1,7 mmol / l, LDL - 2,3 mmol / l i triglicerydów - 0,8 mmol / l. W modelu regresji wielorakiej nie stwierdzono korelacji między wskaźnikami diety i wyrównaniem metabolicznym mierzonym za pomocą HbA1c lub lipidogramu oraz miejscem zamieszkania (wieś, małe miasteczko, duże miasto). Jednak różnice w jakości diety zależały od płci. Kobiety charakteryzowały się wyższym wskaźnikiem zdrowej diety (pHDI-10) (26,3 vs 21,4, p = 0,005) i niższym wskaźnikiem niezdrowej diety (nHDI-14) (13,3 vs 18,6, p <0,001) niż mężczyźni. Wnioski: Wyniki tego badania wyraźnie wskazują, że pomimo dobrej kontroli metabolicznej pacjenci wymagają większej edukacji w zakresie wyboru zdrowych grup produktów.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2019, 70, 3
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Domain WEB Monitoring
Autorzy:
Kluska-Nawarecka, S.
Opaliński, A.
Wilk-Kołodziejczyk, D.
Powiązania:
https://bibliotekanauki.pl/articles/381651.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
web monitoring
foundry industry
data integration
monitoring Internetu
przemysł odlewniczy
integracja danych
Opis:
The last few years have seen a very dynamic development of the Internet worldwide. This is related to the rapid growth of the amount of information stored in its resources. The vast amount of data, impossible to be analyzed by man, is the reason why finding and selecting valuable information from a large number of results returned by search engines has recently become the task very difficult. Another problem is the low quality of the data contained in a large part of the results returned by search engines. This situation poses serious problems if one searches for detailed information related to the specific area of industry or science. In addition, the lack of effective solutions, allowing for continuous monitoring of WEB in terms of the search for emerging information while maintaining the high quality of the returned results, only aggravates this situation. Due to this state of affairs, a solution highly welcome would be a system allowing for continuous monitoring of the WEB and searching for valuable information from the selected Internet resources. This paper describes a concept of such a system along with its initial implementation and application to search for information in the foundry industry. The results of a prototype implementation of this system were presented, and plans for its further development and adaptation to other sectors of the industry were outlined.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 43-46
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of systemic cryotherapy on physical fitness
Autorzy:
Roslanowski, A.
Glibowski, E.
Winiarski, S.
Wilk, I.
Powiązania:
https://bibliotekanauki.pl/articles/1670.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
human body
cryotherapy
broad effect
systemic cryotherapy
physical fitness
Opis:
Background: Systemic cryotherapy has broad effects on the human body. These include improved immunity, accelerated tissue regeneration, activation of thermoregulatory mechanisms, analgesic effects, and reduced muscle tension and spasticity without compromising strength. Aim of the study: To evaluate the effect of systemic cryotherapy on physical fitness. Material and methods: The 43 participants (42 – 53 years of age) underwent 10 daily treatments in a nitrogen cryochamber over two consecutive weeks. Each cryochamber treatment lasted for 3 minutes at -130°C. Physical fitness was tested before and after the cryochamber treatment course using elements of three physical testing methods (a functional movement screen, a TKKF physical fitness test and a general fitness test). Results: After cryotherapy, there was a visible improvement in the first four exercises of the fitness test with fewer participants feeling pain during movement, and more able to perform the exercises correctly or perfectly. For the remaining three exercises, the changes occurred in fewer subjects and to a lesser extent. Conclusions: Systemic cryotherapy was associated with improved physical fitness. It can be used to help increase overall physical fitness as a complementary and supportive process.
Źródło:
Medical Science Pulse; 2018, 12, 2
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heuristic models of the toughening process to improve the properties of non-ferrous metal alloys
Heurystyczne modele procesu cieplnego ulepszania właściwości stopów metali kolorowych
Autorzy:
Górny, Z.
Kluska-Nawarecka, S.
Wilk-Kołodziejczyk, D.
Powiązania:
https://bibliotekanauki.pl/articles/355717.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
copper alloys
knowledge model
inference methods
artificial intelligence
heuristics
stopy miedzi
model wiedzy
metody wnioskowania
sztuczna inteligencja
heurystyka
Opis:
The object of the conducted experimental studies was determination of the physical properties of the BA1044 alloy subjected to several types of toughening and modification under varying conditions. The aim of the experiments was to determine which of the above mentioned technological processes has greater impact on the value of the alloy parameters and how these treatments should be chosen to get the metal with the desired properties on a limited number of experiments.
Przedmiotem prowadzonych badan eksperymentalnych było określenie właściwości fizycznych stopu BA1044 poddanego kilku rodzajom ulepszania cieplnego oraz przy różnych warunkach modyfikacji. Celem eksperymentu było określenie, które ze wspomnianych zabiegów technologicznych posiadają największy wpływ na wartości badanych parametrów metalu oraz w jaki sposób należy dobierać te działania aby uzyskać metal o pożądanych właściwościach przy ograniczonej liczbie eksperymentów.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 3; 849-852
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mixture of crushed-stone aggregate as material for substructure layers
Autorzy:
Hydzik-Wiśniewska, J.
Wilk, A.
Bednarek, Ł.
Olesiak, S.
Powiązania:
https://bibliotekanauki.pl/articles/178247.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mixture of crushed-stone aggregate
California bearing ratio
CBR
road substructure
Opis:
One of the most important elements of road construction is its substructure, which constitutes the base on which the next layers of road are placed. Mixture of crushed-stone aggregate is very often used as material for substructure. The most frequently used type of aggregate is magma rocks, due to its good physicalmechanical properties. However, it is not always available, so it is substituted by sandstone or even concreto rubble aggregates. The bearing ratio CBR is a parameter determining the suitability of a certain aggregate for road substructure. It is also one of the most popular quality tests of aggregate as it does not require complex apparatus. This paper analyses the results of physical and geotechnical tests with particular focus on CBR bearing ratio of crushed aggregates and their application as substructure for road construction. There has also been an attempt to find the correlation between CBR bearing ratio and other physical and geometrical properties.
Źródło:
Studia Geotechnica et Mechanica; 2018, 40, 2; 154-162
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Application Of Local Indicators For Categorical Data (LICD) In The Spatial Analysis Of Economic Development
Autorzy:
Pietrzak, Michał B.
Wilk, Justyna
Bivand, Roger S.
Kossowski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/633087.pdf
Data publikacji:
2014-12-01
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
join-count test
spatial dependence
local indicators of spatial association (LISA)
exploratory spatial data analysis (ESDA)
economic development
taxonomic analysis
Opis:
The paper makes an attempt to apply local indicators for categorical data (LICD) in the spatial analysis of economic development. The first part discusses the tests which examine spatial autocorrelation for categorical data. The second part presents a two-stage empirical study covering 66 Polish NUTS 3 regions. Firstly, we identify classes of regions presenting different economic development levels using taxonomic methods of multivariate data analysis. Secondly, we apply a join-count test to examine spatial dependencies between regions. It examines the tendency to form the spatial clusters. The global test indicates general spatial interactions between regions, while local tests give detailed results separately for each region. The global test detects spatial clustering of economically poor regions but is statistically insignificant as regards well-developed regions. Thus, the local tests are also applied. They indicate the occurrence of five spatial clusters and three outliers in Poland. There are three clusters of wealth. Their development is based on a diffusion impact of regional economic centres. The areas of eastern and north western Poland include clusters of poverty. The first one is impeded by the presense of three indiviual growth centres, while the second one is out of range of diffusion influence of bigger agglomerations.
Źródło:
Comparative Economic Research. Central and Eastern Europe; 2014, 17, 4; 203-220
1508-2008
2082-6737
Pojawia się w:
Comparative Economic Research. Central and Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the BA1044 alloy properties and their interpretation with the use of fuzzy logic
Autorzy:
Górny, Z.
Kluska-Nawarecka, S.
Wilk-Kołodziejczyk, D.
Saja, K.
Powiązania:
https://bibliotekanauki.pl/articles/380513.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modification
heat treatment
copper alloy
artificial intelligence
fuzzy logic
simulation studies
modyfikacja
obróbka cieplna
stop miedzi
sztuczna inteligencja
logika rozmyta
badania symulacyjne
Opis:
The study presents the results of research aimed at the construction of a model of the relationship between the physical properties of metal and the types of toughening treatment and modifiers used in the modification of BA1044 alloy. Samples of melts were subjected to four variants of the heat treatment and to five types of modification. Studies of the samples consisted in measurements of five physical parameters. Consequently, it was necessary to seek a relationship between the nine input parameters and five output parameters. With this number of the variables and a limited number of samples, searching for the relationships by way of statistical methods was obviously impossible, so it was decided to create an approximate model through the use of fuzzy logic. This study describes the process of creating a model and presents the results of some simulation experiments that confirm the validity of the correct approach.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2; 75-79
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Case-Based Reasoning System for the Selection of Silumin Alloying Elements
Autorzy:
Rojek, G.
Regulski, K.
Kluska-Nawarecka, S.
Wilk-Kołodziejczyk, D.
Powiązania:
https://bibliotekanauki.pl/articles/382446.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry industry
information technology
silumin
mechanical properties
modified alloys
additions Cr, Mo, V, W
przemysł odlewniczy
technologia informacyjna
właściwości mechaniczne
stopy modyfikowane
dodatki Cr, Mo, V, W
Opis:
This work presents the project of the application of Case-based reasoning (CBR) methodology to an advisory system. This system should give an assistance by selection of proper alloying additives in order to obtain a material with predetermined mechanical properties. The considered material is silumin EN AC-46000 (hypoeutectic Al-Si alloy) that is modified by the addition of Cr, Mo, V and W elements in the range from 0% to 0.5% in the modified alloy. The projected system should indicate to the user the content of particular additives so that the obtained material is in the chosen range of parameters: tensile strength Rm, yield strength Rp0.2, elongation A and hardness HB. The CBR methodology solves new problems basing on the solutions of similar problems resolved in the past. The advantage of the CBR application is that the advisory system increases knowledge base as the subsequent use of the system. The presented design of the advisory system also considers issues related to the ergonomics of its operation.
Źródło:
Archives of Foundry Engineering; 2018, 18, 3; 126-131
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Implementation of Computer Platform for Foundries Cooperating in a Supply Chain
Autorzy:
Wilk-Kołodziejczyk, D.
Kluska-Nawarecka, S.
Rojek, G.
Regulski, K.
Powiązania:
https://bibliotekanauki.pl/articles/382875.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
application of information technology
foundry industry
innovative foundry technologies
innovative materials
multi-agent technology
production support
zastosowanie technologii informatycznych
przemysł odlewniczy
innowacyjne technologie odlewnicze
materiały innowacyjne
wsparcie produkcji
Opis:
This article presents a practical solution in the form of implementation of agent-based platform for the management of contracts in a network of foundries. The described implementation is a continuation of earlier scientific work in the field of design and theoretical system specification for cooperating companies [1]. The implementation addresses key design assumptions - the system is implemented using multi-agent technology, which offers the possibility of decentralisation and distributed processing of specified contracts and tenders. The implemented system enables the joint management of orders for a network of small and medium-sized metallurgical plants, while providing them with greater competitiveness and the ability to carry out large procurements. The article presents the functional aspects of the system - the user interface and the principle of operation of individual agents that represent businesses seeking potential suppliers or recipients of services and products. Additionally, the system is equipped with a bi-directional agent translating standards based on ontologies, which aims to automate the decision-making process during tender specifications as a response to the request.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3; 111-116
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Advisory System in the Domain of Cooper Alloys Manufacturing
Autorzy:
Wilk-Kołodziejczyk, D.
Kluska-Nawarecka, S.
Rojek, G.
Regulski, K.
Powiązania:
https://bibliotekanauki.pl/articles/383285.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
copper alloy
bronze
modification
quenching
tempering
cased based reasoning
stop miedzi
brąz
modyfikacja
hartowanie
odpuszczanie
Opis:
The main scope of the article is the development of a computer system, which should give advices at problem of cooper alloys manufacturing. This problem relates with choosing of an appropriate type of bronze (e.g. the BA 1044 bronze) with possible modification (e.g. calcium carbide modifications: Ca + C or CaC2) and possible heat treatment operations (quenching, tempering) in order to obtain desired mechanical properties of manufactured material described by tensile strength - Rm, yield strength - Rp0.2 and elongation - A5. By construction of the computer system being the goal of presented here work Case-based Reasoning is proposed to be used. Case-based Reasoning is the methodology within Artificial Intelligence techniques, which enables solving new problems basing on experiences that are solutions obtained in the past. Case-based Reasoning also enables incremental learning, because every new experience is retained each time in order to be available for future processes of problem solving. Proposed by the developed system solution can be used by a technologist as a rough solution for cooper alloys manufacturing problem, which requires further tests in order to confirm it correctness.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3; 77-80
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Process of Data Acquisition Regarding the Process of Casting from the Internet
Autorzy:
Wilk-Kolodziejczyk, D.
Kluska-Nawarecka, S.
Stefański, Z.
Smolarek, A.
Powiązania:
https://bibliotekanauki.pl/articles/380058.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry industry
casting process
information technology
crawler
przemysł odlewniczy
proces odlewania
technologie informatyczne
roboty indeksujące
Opis:
Access to up-to-date information on technology, innovation, source publications, and the materials and services offered in a particular industry is very important for both industrial plants and departmental research centres. It should be noted that obtaining such information using publicly available search engines such as Google, Yahoo!, Bing, Bindu (mainly used in China) is only apparently easy because, due to their versatility, they deliver results with great redundancy. This leads to the need to analyze large data sets by linguistic methods or "manually", which is very tedious and time consuming. In this situation, it was considered reasonable to undertake studies aimed at acquiring relatively simple IT tools, i.e. crawlers, which allow their users to selectively search for information in a particular problem area, which in this particular case is casting. The intention of this work was to collect and analyze the experimental material that would allow describing the characteristics of the above solutions from the point of view of the range of their application, the quality of the results achieved, and possible limitations and preferences taking into account user needs.
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 212-216
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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