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Tytuł:
An algorithm for reducing the dimension and size of a sample for data exploration procedures
Autorzy:
Kulczycki, P.
Łukasik, S.
Powiązania:
https://bibliotekanauki.pl/articles/330110.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
dimension reduction
sample size reduction
linear transformation
simulated annealing
data mining
redukcja wymiaru
transformacja liniowa
wyżarzanie symulowane
eksploracja danych
Opis:
The paper deals with the issue of reducing the dimension and size of a data set (random sample) for exploratory data analysis procedures. The concept of the algorithm investigated here is based on linear transformation to a space of a smaller dimension, while retaining as much as possible the same distances between particular elements. Elements of the transformation matrix are computed using the metaheuristics of parallel fast simulated annealing. Moreover, elimination of or a decrease in importance is performed on those data set elements which have undergone a significant change in location in relation to the others. The presented method can have universal application in a wide range of data exploration problems, offering flexible customization, possibility of use in a dynamic data environment, and comparable or better performance with regards to the principal component analysis. Its positive features were verified in detail for the domain’s fundamental tasks of clustering, classification and detection of atypical elements (outliers).
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 1; 133-149
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the application of statistical kernel estimators for the demand-based design of a wireless data transmission system
Autorzy:
Kulczycki, P.
Waglowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/970993.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
telekomunikacja
logika rozmyta
badania operacyjne
programowanie matematyczne
telecommunication
wireless broadband data transmission systems
LMDS
statistical kernel estimators
fuzzy logic
operations research
mathematical programming
Opis:
The subject of this paper is the task of designing the LMDS (Local Multipoint Distribution System) wireless broadband data transmission system. The methodology of statistical kernel estimators and fuzzy logic using operations research and mathematical programming is applied to find optimal locations for its basestations. A procedure which allows to obtain such locations on the basis of potential customer distribution and their expected demand, also in the cases of uncertain and non-stationary data, is investigated.
Źródło:
Control and Cybernetics; 2005, 34, 4; 1149-1167
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Euler-Poincare reduction of externally forced rigid body motion
Autorzy:
Wiśniewski, R.
Kulczycki, P.
Powiązania:
https://bibliotekanauki.pl/articles/970328.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
modelowanie
sterowanie
ruch ciała sztywnego
mechanika Lagrange'a
kształtowanie energetyczne
modelling
control
rigid body motion
Lagrange mechanics
energy shaping
Opis:
If a mechanical system experiences symmetry, the Lagrangian becomes invariant under a certain group action. This property leads to substantial simplification of the description of movement. The standpoint in this article is a mechanical system affected by an external force of a control action. Assuming that the system possesses symmetry and the configuration manifold corresponds to a Lie group, the Euler-Poincare reduction breaks up the motion into separate equations of dynamics and kinematics. This becomes of particular interest for modeling, estimation and control of mechanical systems. A control system generates an external force, which may break the symmetry in the dynamics. This paper shows how to model and to control a mechanical system on the reduced phase space, such that complete state space asymptotic stabilization can be achieved. The paper comprises a specialization of the well-known Euler-Poincare reduction to a rigid body motion with forcing. An example of satellite attitude control illustrates usefulness of the Euler-Poincare reduction in control engineering. This work demonstrates how the energy shaping method applies for Euler-Poincare equations.
Źródło:
Control and Cybernetics; 2004, 33, 2; 297-310
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An algorithm for Bayes parameter identification with quadratic asymmetrical loss function
Autorzy:
Kulczycki, P.
Mazgaj, A.
Powiązania:
https://bibliotekanauki.pl/articles/970992.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
sterowanie optymalne
parameter identification
Bayes decision
quadratic asymmetrical loss function
kernel estimators
optimal control
Opis:
The paper deals with the estimation problem of model parameter values, in tasks where overestimation implies results other than underestimation, and wliere losses arising from this can be described by a quadratic function with different coefficients characterizing positive and negative errors. In the approach presented, the Bayes decision rule was used, allowing for minimizing potential losses. Calculation algorithms were based on the theory of statistical kernel estimators, which frees the method from distribution type. The result constitutes a complete numerical procedure enabling effective calculation of the value of an identified parameter or - in the multidimensional case - the vector of parameters. The method is aimed at both of the main contemporary approaches to uncertainty modeling: probabilistic and fuzzy logic. It is universal in nature and can be applied in a wide range of tasks of engineering, economy, sociology, biomedicine and other related fields.
Źródło:
Control and Cybernetics; 2005, 34, 4; 1127-1148
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A complete gradient clustering algorithm formed with kernel estimators
Autorzy:
Kulczycki, P.
Charytanowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/907781.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
analiza danych
eksploracja danych
grupowanie
metoda statystyczna
estymacja jądrowa
obliczenia numeryczne
data analysis
data mining
clustering
gradient procedures
nonparametric statistical methods
kernel estimators
numerical calculations
Opis:
The aim of this paper is to provide a gradient clustering algorithm in its complete form, suitable for direct use without requiring a deeper statistical knowledge. The values of all parameters are effectively calculated using optimizing procedures. Moreover, an illustrative analysis of the meaning of particular parameters is shown, followed by the effects resulting from possible modifications with respect to their primarily assigned optimal values. The proposed algorithm does not demand strict assumptions regarding the desired number of clusters, which allows the obtained number to be better suited to a real data structure. Moreover, a feature specific to it is the possibility to influence the proportion between the number of clusters in areas where data elements are dense as opposed to their sparse regions. Finally, the algorithm-by the detection of one-element clusters-allows identifying atypical elements, which enables their elimination or possible designation to bigger clusters, thus increasing the homogeneity of the data set.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2010, 20, 1; 123-134
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bayes classification of imprecise information of interval type
Autorzy:
Kulczycki, P.
Kowalski, P. A.
Powiązania:
https://bibliotekanauki.pl/articles/205655.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
data analysis
classification
imprecise information
interval type information
statistical kernel estimators
reduction in pattern size
classifier parameter correction
sensitivity method for artificial neural networks
Opis:
The subject of the investigation presented here is Bayes classification of imprecise multidimensional information of interval type by means of patterns defined through precise data, e.g. deterministic or sharp. For this purpose the statistical kernel estimators methodology was applied, which makes the resulting algorithm independent of the pattern shape. In addition, elements of pattern sets which have insignificant or negative influence on the correctness of classification are eliminated. The concept for realizing the procedure is based on the sensitivity method, used in the domain of artificial neural networks. As a result of this procedure the number of correct classifications and - above all - calculation speed increased significantly. A further growth in quality of classification was achieved with an algorithm for the correction of classifier parameter values. The results of numerical verification, carried out on pseudorandom and benchmark data, as well as a comparative analysis with other methods of similar conditioning, have validated the concept presented here and its positive features.
Źródło:
Control and Cybernetics; 2011, 40, 1; 101-123
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ensembling a linear regression model with an error mitigation component
Autorzy:
Nowosielski, A.
Kowalski, P. A.
Kulczycki, P.
Powiązania:
https://bibliotekanauki.pl/articles/950759.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
ensemble model
error mitigation
regression model
linear regression
FPA
RSS
RSE
model regresji
regresja liniowa
Opis:
This paper presents a proposal of a model error mitigation technique based on the error distribution analysis of the original model and creatng the additional model that tempers the error impact in particular domain areas identified as the most sensitive. both models are then combined into single ensemble model. The idea is demonstrated on the trivial two-dimensional linear regression model.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 1; 40-43
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hard and soft sub-time-optimal controllers for a mechanical system with uncertain mass
Autorzy:
Kulczycki, P.
Wisniewski, R.
Kowalski, P.
Krawiec, K.
Powiązania:
https://bibliotekanauki.pl/articles/970463.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
sterowanie optymalne
odporność
system mechaniczny
masa niepewna
proces stochastyczny
budowa podoptymalna
optimal control
mechanical system
uncertain mass
stochastic process
suboptimal structure
robustness
Opis:
An essential limitation in using the classical optimal control has been its limited robustness to modeling inadequacies and perturbations. This paper presents the concepts of two practical control structures based on the time-optimal approach, a hard and soft one. The hard structure is defined by the parameters selected in accordance with the rules of the statistical decision theory: however, the soft structure allows additionally for elimination of rapid changes in control values. The object is a basic mechanical system, with uncertain (also non-stationary) mass treated as a stochastic process. The methodology proposed here is of a universal nature and may easily be applied with respect to other elements of uncertainty of time-optimal controlled mechanical systems.
Źródło:
Control and Cybernetics; 2004, 33, 4; 573-587
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Naming boys after U.S. presidents in 20th century
Autorzy:
Kułakowski, K.
Kulczycki, P.
Misztal, K.
Dydejczyk, A.
Gronek, P.
Krawczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1075471.pdf
Data publikacji:
2016-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.20.-a
89.65.Cd
Opis:
This paper deals with the popularity of given names in the United States, for the period 1885-2009. Based on the data obtained from the website of U.S. Social Security Administration, it was demonstrated that the fashion of naming babies after the incumbent American president passed away in the '60s. At the same time, however, examples were given, mainly concerning celebrities, after whom babies are still named. The above theses were strengthened with the aid of quantitative data analysis by constructing an index dedicated to the specifics of the task under investigation. The obtained results were discussed in the terms of the rally effect and of the Simmel theory of fashion.
Źródło:
Acta Physica Polonica A; 2016, 129, 5; 1038-1044
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geodezja w służbie nadzoru górniczego
Geodesy in service to mining supervision
Autorzy:
Kulczycki, Z.
Trzcionka, P.
Powiązania:
https://bibliotekanauki.pl/articles/262532.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
geodezja górnicza
przepisy prawne
regulacje prawa geologiczno-górniczego
mine surveying
legal regulations
regulation of geological and mining law
Opis:
Prawo geologiczne i górnicze nakłada na przedsiębiorców obowiązek posiadania i uzupełniania dokumentacji mierniczo-geologicznej zakładu górniczego. Prace z tym związane wykonywać mogą wyłącznie osoby posiadające kwalifikacje mierniczego górniczego, potwierdzone świadectwem wydanym przez Prezesa Wyższego Urzędu Górniczego, będące w większości absolwentami Wydziału Geodezji Górniczej i Inżynierii Środowiska AGH. Czynności mierniczego górniczego podlegają kontroli organów nadzoru górniczego. Z upoważnienia dyrektorów okręgowych urzędów górniczych nadzór i kontrolę wykonują osoby posiadające również wspomniane kwalifikacje. Do zadań tych osób należy nadto egzekwowanie obowiązków dotyczących ochrony powierzchni, w tym obiektów budowlanych, gospodarki złożem, rekultywacji i zagospodarowania terenów po działalności górniczej. Prace służb mierniczych w urzędach górniczych koordynuje Departament Ochrony Środowiska i Gospodarki Złożem WUG.
Geological and Mining Law obliges entrepreneurs to have and supplement the surveying--geological documentation of mine. The works connected to doing it can only be lead by persons certificated as a mining surveyors with the certificate enacted by President of the State Mining Authority, which persons are, in the majority, graduates of the Department of Mining Geodesy and Environmental Engineering of the Mining and Metallurgy Academy. The activity of mining surveyors is under inspection of mining authorities. On the authorization of directors of district mining authorities the inspection is also lead by inspectors, who has the same certificates. Moreover, the tasks of they include enforcement of duties concerning to land protection (including buildings), resource management, land recultivation as well as manage of post-mining lands. Works of surveying inspectors of district mining authorities are coordinated by the Department of Environmental Protection and Resource Management of the State Mining Authority.
Źródło:
Geodezja / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2006, 12, 2/1; 267-276
1234-6608
Pojawia się w:
Geodezja / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 15

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