Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923596
R. Struharik, Vuk Vranjkovic, S. Dautovic, L. Novak
In this paper an application of evolutionary algorithm to oblique decision tree inference is presented. In the core of new decision tree inducing algorithm is the specific evolutionary algorithm called HereBoy. Performance of proposed HBDT algorithm is studied and compared with eight existing decision tree building algorithms using standard benchmark datasets obtained from the UCI Machine Learning Repository database. The results of experimental study indicate that the proposed HBDT algorithm compares very favorably with some of the previously proposed decision tree building algorithms.
{"title":"Inducing oblique decision trees","authors":"R. Struharik, Vuk Vranjkovic, S. Dautovic, L. Novak","doi":"10.1109/SISY.2014.6923596","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923596","url":null,"abstract":"In this paper an application of evolutionary algorithm to oblique decision tree inference is presented. In the core of new decision tree inducing algorithm is the specific evolutionary algorithm called HereBoy. Performance of proposed HBDT algorithm is studied and compared with eight existing decision tree building algorithms using standard benchmark datasets obtained from the UCI Machine Learning Repository database. The results of experimental study indicate that the proposed HBDT algorithm compares very favorably with some of the previously proposed decision tree building algorithms.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123406590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923573
A. Varga, Janos Libor, Ervin Rácz, P. Kádár
Investigation of electric operation of solar panels became crucially important field in physics and engineering science. In this paper a new small, laboratory-scale experimental method and arrangement for investigating the wavelength dependent irradiation of solar cells is introduced. Components and the scheme of the setup is discussed in details. Testing and proving the usability and accuracy of the idea and the arrangement experiments were ran and results were presented. Both the plots and the preliminary raw data show great accuracy and high level stability and precision of the new, table-top setup.
{"title":"A small laboratory-scale experimental method and arrangement for investigating wavelength dependent irradiations of solar cells","authors":"A. Varga, Janos Libor, Ervin Rácz, P. Kádár","doi":"10.1109/SISY.2014.6923573","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923573","url":null,"abstract":"Investigation of electric operation of solar panels became crucially important field in physics and engineering science. In this paper a new small, laboratory-scale experimental method and arrangement for investigating the wavelength dependent irradiation of solar cells is introduced. Components and the scheme of the setup is discussed in details. Testing and proving the usability and accuracy of the idea and the arrangement experiments were ran and results were presented. Both the plots and the preliminary raw data show great accuracy and high level stability and precision of the new, table-top setup.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121605967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923571
Attila Vass, P. Kádár
A strongly developing sector of the small scale photovoltaic (PV) systems are the urban applications. There are a lot of compromise where and how to set up these systems in a crowded city. A lot of limiting constraints such as roof space available, shadow effects, orientation of the roof, etc. Because of the disadvantageous ideal circumstances appear the multi-tilted PV systems, where some strings or some element of the string is oriented in different directions. In this paper we give the basics of the energy yield calculation and also compare these calculations to real measurements.
{"title":"Analysis of annual production of a multi-tilted PV system","authors":"Attila Vass, P. Kádár","doi":"10.1109/SISY.2014.6923571","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923571","url":null,"abstract":"A strongly developing sector of the small scale photovoltaic (PV) systems are the urban applications. There are a lot of compromise where and how to set up these systems in a crowded city. A lot of limiting constraints such as roof space available, shadow effects, orientation of the roof, etc. Because of the disadvantageous ideal circumstances appear the multi-tilted PV systems, where some strings or some element of the string is oriented in different directions. In this paper we give the basics of the energy yield calculation and also compare these calculations to real measurements.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133825617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923576
M. Kalina, Maddalena Manzi, B. Mihailovic
In [9], [10], T-supermodularity for the Choquet integral has been studied. In this paper, a generalized super-modularity for the Choquet-like integral, the generalization of the Choquet integral, is considered.
{"title":"Pseudo-supermodularity for the Choquet-like integrals","authors":"M. Kalina, Maddalena Manzi, B. Mihailovic","doi":"10.1109/SISY.2014.6923576","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923576","url":null,"abstract":"In [9], [10], T-supermodularity for the Choquet integral has been studied. In this paper, a generalized super-modularity for the Choquet-like integral, the generalization of the Choquet integral, is considered.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131551841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923605
G. Hermann
Beside the dimensions, the geometric quality of a sandwich panel is determined by the straightness and the parallelism of the edges of the panel. This in turn is highly influenced by the guide ways. The paper describes the principle and the construction of an instrument for determining the straightness and the relative parallelism of the guide ways of a sandwich panel producing machine.
{"title":"Determination of the track parallelism of a sandwich panel producing machine","authors":"G. Hermann","doi":"10.1109/SISY.2014.6923605","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923605","url":null,"abstract":"Beside the dimensions, the geometric quality of a sandwich panel is determined by the straightness and the parallelism of the edges of the panel. This in turn is highly influenced by the guide ways. The paper describes the principle and the construction of an instrument for determining the straightness and the relative parallelism of the guide ways of a sandwich panel producing machine.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132819801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923614
T. Ferenci, L. Kovács
Clinical chemistry tests are widely used in medical diagnosis. Physicians typically interpret them in a univariate sense, by comparing each parameter to a reference interval, however, their correlation structure may also be interesting, as it can shed light on common physiologic or pathological mechanisms. The correlation analysis of such parameters is hindered by two problems: the relationships between the variables are sometimes non-linear and of unknown functional form, and the number of such variables is high, making the use of classical tools infeasible. This paper presents a novel approach to address both problems. It uses an information theory-based measure called total correlation to quantify the dependence between clinical chemistry variables, as total correlation can detect any dependence between the variables, non-linear or even non-monotone ones as well, hence it is completely insensitive to the actual nature of the relationship. Another advantage is that is can quantify dependence not only between pairs of variables, but between larger groups of variables as well. By the virtue of this fact, a novel approach is presented that can handle the high dimensionality of clinical chemistry parameters. The approach is implemented and illustrated on a real-life database from the representative US public health survey NHANES.
{"title":"Using total correlation to discover related clusters of clinical chemistry parameters","authors":"T. Ferenci, L. Kovács","doi":"10.1109/SISY.2014.6923614","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923614","url":null,"abstract":"Clinical chemistry tests are widely used in medical diagnosis. Physicians typically interpret them in a univariate sense, by comparing each parameter to a reference interval, however, their correlation structure may also be interesting, as it can shed light on common physiologic or pathological mechanisms. The correlation analysis of such parameters is hindered by two problems: the relationships between the variables are sometimes non-linear and of unknown functional form, and the number of such variables is high, making the use of classical tools infeasible. This paper presents a novel approach to address both problems. It uses an information theory-based measure called total correlation to quantify the dependence between clinical chemistry variables, as total correlation can detect any dependence between the variables, non-linear or even non-monotone ones as well, hence it is completely insensitive to the actual nature of the relationship. Another advantage is that is can quantify dependence not only between pairs of variables, but between larger groups of variables as well. By the virtue of this fact, a novel approach is presented that can handle the high dimensionality of clinical chemistry parameters. The approach is implemented and illustrated on a real-life database from the representative US public health survey NHANES.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123909763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923613
J. Komorník, M. Komorníková
The aim of this paper is to compare descriptive and predictive qualities of multivariate TAR models with threshold variables obtained via aggregation functions versus one-dimensional TAR models with endogenous as well as exogenous threshold variables. Time series of REIT indexes of 5 selected G7 countries (USA, Japan, Great Britain, France, Canada) were modelled. They manifest similar behaviour in the considered time period, January 1, 2000-May 8, 2012, divided into 3 sub-periods determined by the recent global financial markets crisis (July 1, 2008-April 30, 2009). The multivariate TAR models with threshold variables constructed via aggregation functions have in all cases better descriptive properties and in most cases they also show better prediction properties. A new subclass of those models, based on the OMA type of aggregation functions, exhibit promising properties both with respect to their descriptive and predictive performance.
{"title":"Modelling multiple REIT indices using TAR models based on aggregation functions","authors":"J. Komorník, M. Komorníková","doi":"10.1109/SISY.2014.6923613","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923613","url":null,"abstract":"The aim of this paper is to compare descriptive and predictive qualities of multivariate TAR models with threshold variables obtained via aggregation functions versus one-dimensional TAR models with endogenous as well as exogenous threshold variables. Time series of REIT indexes of 5 selected G7 countries (USA, Japan, Great Britain, France, Canada) were modelled. They manifest similar behaviour in the considered time period, January 1, 2000-May 8, 2012, divided into 3 sub-periods determined by the recent global financial markets crisis (July 1, 2008-April 30, 2009). The multivariate TAR models with threshold variables constructed via aggregation functions have in all cases better descriptive properties and in most cases they also show better prediction properties. A new subclass of those models, based on the OMA type of aggregation functions, exhibit promising properties both with respect to their descriptive and predictive performance.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"73 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120896987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923586
F. Capkovic
The main aim of this paper is to point out the possibility of utilizing Petri net-based approaches at solving different kinds of problems. Place/transition Petri nets (P/T PN) are utilized here to model the problems and to find the succession(s) of steps leading to their solving. The steps are conditioned either by knowledge based on experience or by a group of rules, constraints, limitations, etc., determined (or created) in dependence on the kind and character of the actual problem in question. The reachability tree (RT) and/or reachability graph (RG) corresponding to the P/T PN-based model help to decide on the feasible solutions. To illustrate the soundness of the proposed approach the simple example as well as the case study from the area of flexible manufacturing systems are introduced.
{"title":"Petri net-based problem solving","authors":"F. Capkovic","doi":"10.1109/SISY.2014.6923586","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923586","url":null,"abstract":"The main aim of this paper is to point out the possibility of utilizing Petri net-based approaches at solving different kinds of problems. Place/transition Petri nets (P/T PN) are utilized here to model the problems and to find the succession(s) of steps leading to their solving. The steps are conditioned either by knowledge based on experience or by a group of rules, constraints, limitations, etc., determined (or created) in dependence on the kind and character of the actual problem in question. The reachability tree (RT) and/or reachability graph (RG) corresponding to the P/T PN-based model help to decide on the feasible solutions. To illustrate the soundness of the proposed approach the simple example as well as the case study from the area of flexible manufacturing systems are introduced.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122471952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923598
E. Pataki, A. Sagi, Jozef Kabok
The work gives a presentation and the critical consideration of postulate applicability of new optimization models of consumer choice. The research includes the analysis and illustration of maximization of feasible usefulness of consumers on the so-called Lancaster model of goods characteristics, analysis of postulates and the model of consumer choice in the conditions of uncertainty, analysis of consumer inclination to bear risk and alternatives of consumer choice in “buying” risk insurance. Special attention is paid to the analysis of influences of “gambling” on consumer choice optimization and the consideration of connections between the price of increasing the level of consumers' information and attainable prosperity.
{"title":"A contemporary approach to postulates of consumer behavior models","authors":"E. Pataki, A. Sagi, Jozef Kabok","doi":"10.1109/SISY.2014.6923598","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923598","url":null,"abstract":"The work gives a presentation and the critical consideration of postulate applicability of new optimization models of consumer choice. The research includes the analysis and illustration of maximization of feasible usefulness of consumers on the so-called Lancaster model of goods characteristics, analysis of postulates and the model of consumer choice in the conditions of uncertainty, analysis of consumer inclination to bear risk and alternatives of consumer choice in “buying” risk insurance. Special attention is paid to the analysis of influences of “gambling” on consumer choice optimization and the consideration of connections between the price of increasing the level of consumers' information and attainable prosperity.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125949746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-16DOI: 10.1109/SISY.2014.6923610
Z. Tóth, L. Kovács
Agglutinative languages, such as Hungarian, use inflection to modify the meaning of words. Inflection is a string transformation which describe how can a word converted into its inflected form. The transformation can be described by a transformational string. The words can be classified by their transformational string, so inflection is considered as a classification. Linear separability of clusters is important to create an efficient and accurate classification method. This paper review a linear programming based testing method of linear separability. This method was analyzed on generated data sets, these measurements showed the time cost of the algorithm grows polynomially with the number of the points. The accusative case of Hungarian was used to create a data set of 56.000 samples. The words were represented in vector space by alphabetical and phonetic encoding and left and right adjust, thus four different representation of words were used during the tests. Our test results showed there are non linear separable cluster pairs in both of the representations.
{"title":"Testing linear separability in classification of inflection rules","authors":"Z. Tóth, L. Kovács","doi":"10.1109/SISY.2014.6923610","DOIUrl":"https://doi.org/10.1109/SISY.2014.6923610","url":null,"abstract":"Agglutinative languages, such as Hungarian, use inflection to modify the meaning of words. Inflection is a string transformation which describe how can a word converted into its inflected form. The transformation can be described by a transformational string. The words can be classified by their transformational string, so inflection is considered as a classification. Linear separability of clusters is important to create an efficient and accurate classification method. This paper review a linear programming based testing method of linear separability. This method was analyzed on generated data sets, these measurements showed the time cost of the algorithm grows polynomially with the number of the points. The accusative case of Hungarian was used to create a data set of 56.000 samples. The words were represented in vector space by alphabetical and phonetic encoding and left and right adjust, thus four different representation of words were used during the tests. Our test results showed there are non linear separable cluster pairs in both of the representations.","PeriodicalId":277041,"journal":{"name":"2014 IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129504110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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