Barbara Mrzygłód

Barbara Mrzygłód
AGH University of Science and Technology in Kraków | AGH · Department of Applied Computer Science and Modelling

About

29
Publications
7,885
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
157
Citations

Publications

Publications (29)
Article
Full-text available
The article presents the results of a sensitivity analysis of artificial neural networks developed for a system which predicts the durability of forging tools used in the selected hot die forging process. The developed system makes it possible to calculate the geometric loss of the examined tool for the given values of its operating parameters (num...
Article
Modern design of technological processes employs various numerical tools. Artificial Intelligence is one of the most promising approaches. However, its application in industrial conditions is still limited. One of the important obstacles is a lack of large data sets, which are necessary for the most of AI approaches. In the paper, we present a modi...
Article
Full-text available
Intelligent computing tools such as artificial neural network and fuzzy logic are used as predictive modeling tools. The use of these methods, combined with model experimental results, may be an excellent predictive tool, allowing us to forecast the microstructure of the tested cast iron at the level of computer simulation. In this study, the refer...
Article
Full-text available
This article concerns a decision-support system based on artificial neural networks (ANN) enabling analysis and forecasting of the durability of forging tools used in the hot forging process of a cover forging – a sealing element of the driveshaft in road freight vehicles. The process of knowledge acquisition, adopted neural network architecture an...
Article
Full-text available
The study analyzes the effect of Ni and Cu additions on the mechanical properties of ADI cast iron in casts with different wall thickness values. The applied experiment plan included the use of combinations of the Ni addition in the amount of 0.5% and 1.5% and the Cu addition in the amount of 0.5% and 1.0%. The content of the remaining elements equ...
Article
Full-text available
The article presents the use of artificial neural networks (ANN) to build a system of analysis and forecasting of the durability of forging tools and the process of acquiring the source knowledge necessary for the network learning process. In particular, the study focuses on the prediction of the geometrical loss of the tool material after differen...
Article
Full-text available
A mathematical model of austenite - bainite transformation in austempered ductile cast iron has been presented. The model is based on a model developed by Bhadeshia [1, 2] for modelling the bainitic transformation in high-silicon steels with inhibited carbide precipitation. A computer program has been developed that calculates the incubation time,...
Article
Full-text available
The results of examinations of microstructure and an analysis of its impact on selected mechanical properties of austempered ductile iron (ADI) were presented in the paper. The ADI was produced from the ductile iron containing 1.56% Ni only alloying addition. The effect of the austempering time and temperature on the microstructure and mechanical p...
Article
Full-text available
This article presents the methodology for exploratory analysis of data from microstructural studies of compacted graphite iron to gain knowledge about the factors favouring the formation of ausferrite. The studies led to the development of rules to evaluate the content of ausferrite based on the chemical composition. Data mining methods have been u...
Article
Full-text available
The paper presents the results of research concerning the percentage participation of destructive mechanisms for two typical variants of exploitation of forging tools: lubricated and cooled, and without lubrication. Discussed results come from the developed by the authors the decision support system (SEPEK-2) based on artificial neural network. The...
Article
Full-text available
The concept of the 4th Industrial Revolution and the concept of Industry 4.0 are beginning to emerge in many areas of human life and are no longer the domain of the manufacturing industry. Medicine is a special area in which the development of new technologies should bring new opportunities for the diagnosis and treatment of people, as well as the...
Article
Full-text available
The article presents opportunities offered by the data mining analysis as applied to studies of the effect of process parameters on the mechanical properties of ADI. The applied methods of regression trees and cluster analysis allow for the detection of relationships between parameters and also allow determination of strength and form of the impact...
Article
Full-text available
Metallographic examinations and mechanical tests were carried out on the ductile iron with additions of Ni, Cu and Mo in as-cast state and after austempering. TTT and CCT diagrams were plotted. The heat treatment was performed in six different variants. Studies included qualitative assessment of the microstructure and testing of mechanical properti...
Article
Full-text available
The paper presents an idea of an expert system for determining the quantitative contributions of four principal mechanisms (abrasive wear, thermo-mechanical fatigue, plastic deformation, and mechanical fatigue) to the degradation of forging tools and the geometric die impression loss for a selected industrial hot forging process. The knowledge need...
Article
The problem discussed in this article relates to the integration of knowledge about the design process of products from ADI. Specialised domain knowledge, often resulting from costly experiments, published in the world in a large number of magazines, is an invaluable source of information for its users and researchers. The authors draw attention to...
Article
Full-text available
The paper presents a mathematical model of the pearlite – austenite transformation. The description of this process uses the diffusion mechanism which takes place between the plates of ferrite and cementite (pearlite) as well as austenite. The process of austenite growth was described by means of a system of differential equations solved with the u...
Article
Full-text available
The article presents two modules operating in a hybrid CAPCAST system implemented in the Department of Applied Computer Science and Modelling, AGH University of Science and Technology, Cracow. These are the modules: CAPCAST-base of producers and CAPCAST-base of materials. Registered producers may benefit from other modules of the system, the base c...
Article
Full-text available
Stereological description of dispersed microstructure is not an easy task and remains the subject of continuous research. In its practical aspect, a correct stereological description of this type of structure is essential for the analysis of processes of coagulation and spheroidisation, or for studies of relationships between structure and properti...
Article
Full-text available
The study presented here is related with one of the components of a hybrid decision support system called CAPCAST (Computer Aided Process -CAST), developed under a research project at the Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology. This is a module for rule generation to serve the knowled...
Article
Full-text available
The method of parametric representation of TTT diagrams on example of selected austempered ductile cast irons is presented. TTT diagrams were digitalised and n, k parameters of Johnson Mehl equation were calculated. The relationships between n, k parameters and transformation temperature were analysed for two ADI irons. Knowledge of these parameter...
Article
Full-text available
o l u m e 1 1 , I s s u e 3 / 2 0 1 1 , 8 1 -86 Abstract This study is related with one of the components of a hybrid decision support system called CAPCAST, implemented under a research project conducted by WIMIIP AGH. It is a model of knowledge representation about materials in the form of a relational database, de-signed to allow the transformat...
Article
Full-text available
Efficient use of corporate resources in the form of intellectual capital is due in large measure to effectiveness of knowledge codification and distribution systems. Making intellectual resources available to employees in time short enough to enable efficient use is possible due to search tools. The goal is to provide relevant and significant knowl...
Article
Full-text available
Development of a diagnostic decision support system using different then divalent logical formalism, in particular fuzzy logic, allows the inference from the facts presented not as explicit numbers, but described by linguistic variables such as the "high level", "low temperature", "too much content", etc. Thanks to this, process of inference resemb...
Conference Paper
Full-text available
The computer program "PWD - QUENCH HARDENING" was developed for supporting of quenching process of constructional steel. Using data on the effect of chemical composition of steel on its ideal critical diameter the hardenability parameters are calculated. Program enables to select a quenching media for through hardening of steel bars with given diam...
Article
Full-text available
Many foundries existing in Poland make casts for local and external market. It is necessary to adopt a quality control to client's requirements. The main problem in the quality control of casting products is to detect and to classify properly defects. Polish defect classification is base nod the Polish Norm. In other countries (Czech Republic and F...
Article
Full-text available
o l u m e 7 , I s s u e 3 / 2 0 0 7 , 2 4 7 -2 5 2 247 Abstract This study presents an output of the application of a probabilistic method of inference based on Bayes' rule in the diagnosis of defects formed during hot-dip galvanising process of casting products. Bayesian cause-effect network for given group of surface defects and its causes was bu...

Projects

Project (1)
Archived project
Data integration, biomedical infrastructure support system for research in domain of polysomnography surveys.