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  1. 9 Journal of Applied Computer Science
  2. 8 Fundamenta Informaticae
  3. 4 Prace Instytutu Podstaw Informatyki Polskiej Akademii Nauk
  4. 4 Studia Informatica : systems and information technology
  5. 4 Studia Informatica : systemy i technologie informacyjne
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  1. 42 Niewiadomski A.
  2. 15 Penczek W.
  3. 9 Szreter M.
  4. 6 Półrola A.
  5. 5 Skaruz J.
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  1. 2 2018
  2. 4 2016
  3. 3 2015
  4. 6 2014
  5. 2 2013
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1
Content available remote Dedicated type-2 fuzzy logic systems: a novel approach to DeNOx filtration systems
Niewiadomski A., Kacprowicz M.
Journal of Applied Computer Science
|
2018
|
Vol. 26, nr 2
117--130
EN
The paper presents some novel research on applications of Type-2 Fuzzy Logic Systems to support the Selective Catalytic Reduction process (SCR). The aim of the research is to design and test higher order fuzzy logic systems and their genuine modifications to manage data in DeNOx systems responsible for controlling emission of nitrogen oxides (NO, NO2). Since in real applications, it is still performed under the supervision of a human expert, the scope is to replace, at least partially, his/her participation with dedicated type-2 fuzzy logic systems. As the result, it is shown that the proposed systems with new means of learning fuzzy IF-THEN rules allow us to compute parameters much closer to those determined by experts, even in a comparison to some earlier approaches based on traditional fuzzy logic.
2
Content available remote TripICS-a Web Service Composition System for Planning Trips and Travels
Niewiadomski A., Switalski P., Kowalczyk M., Penczek W.
Fundamenta Informaticae
|
2018
|
Vol. 157, nr 4
403--425
EN
We present the web service composition system TripICS, which allows for an easy and user-friendly planning of visits to interesting cities and places around the world in combination with travels, arranged in the way satisfying the user’s requirements. TripICS is a specialization of the concrete planning of PlanICS viewed as a constrained optimization problem to the ontology containing services provided by hotels, airlines, railways, museums etc. The system finds an optimal plan by applying a modification of the most efficient concrete planner of PlanICS based on a combination of an SMT-solver with the algorithm GEO. The modification has been designed in order to solve quickly multiple equality constraints. The efficiency of the new planning algorithm is proved by experimental results.
3
Content available Applying artificial intelligence algorithms in MOBA games
Wiśniewski M., Niewiadomski A.
Studia Informatica : systems and information technology
|
2016
|
Vol. 1-2(20)
53--64
EN
Multiplayer Online Battle Arena games focus mainly on struggles between two teams of players. An increasing level of cyberbullying [1] discourages new players from the game and they often chose a different option, that is, a match against opponents controlled by the computer. The behavior of artificial foes can be dynamically fitted to user’s needs, in particular with regard to the difficulty of the game. In this paper we explore different approaches to provide an intelligent behavior of bots basing on more human-like combat predictions rather than instant, scripted behaviors.
4
Content available Ocena wpływu nawożenia preparatem Biocal na właściwości fizykochemiczne i produktywność gleb przy wykorzystaniu biotestu Phytotoxkit
Niewiadomski A.
Przegląd Naukowy Inżynieria i Kształtowanie Środowiska
|
2016
|
Vol. 25, No. 4
453--462
PL
Celem przeprowadzonych badań była ocena wykorzystania biotestu Phytotoxkit do określenia wpływu zmiennych dawek preparatu wapniowo-organicznego Biocal na próby gleb – próchniczną i mineralną. Dla weryfikacji przeprowadzono analizę oddziaływania nawozu na właściwości fizykochemiczne gleb. Stwierdzono wzrost zasobności obydwu gleby w związki wapnia, spadek kwasowości hydrolitycznej i wzrost pojemności sorpcyjnej. Badanie wskaźnika inhibicji kiełkowania SG wykazało, że tylko małe dawki nawozu (do 0,5 g) wpłynęły korzystnie na rośliny testowe. W porównaniu z glebami nienawożonymi dawka Biocalu do 0,5 g dla gleby próchnicznej i 0,25 g dla mineralnej była korzystna w stosunku do stymulacji wzrostu korzeni roślin, gdyż wskaźnik RI osiągał wartości ujemne.
EN
The aim of the present study was to evaluate the use of Phytotoxkit biotest to determine the effect of humic and mineral soils fertilization with variable doses of calcium-organic Biocal preparation. To verify the effect of fertilizer the analysis of Biocal impact on physicochemical properties was executed. An increase of calcium content, decrease of hydrolytic acidity and increase of sorption capacity in both soil samples was ascertained. The research of seed germination index SG showed that only small doses of fertilizer (up to 0,5 g) had a positive effect on the test plants. In comparison to non-fertilized soils the 0,5 g dose of Biocal in humic soil and 0,25 g in mineral soil was beneficial with respect to root growth stimulation, as RI index reached negative values.
5
Content available Note onset detection in musical signals via neural-network-based multi-ODF fusion
Stasiak B., Mońko J., Niewiadomski A.
International Journal of Applied Mathematics and Computer Science
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2016
|
Vol. 26, no. 1
203--213
EN
The problem of note onset detection in musical signals is considered. The proposed solution is based on known approaches in which an onset detection function is defined on the basis of spectral characteristics of audio data. In our approach, several onset detection functions are used simultaneously to form an input vector for a multi-layer non-linear perceptron, which learns to detect onsets in the training data. This is in contrast to standard methods based on thresholding the onset detection functions with a moving average or a moving median. Our approach is also different from most of the current machine-learning-based solutions in that we explicitly use the onset detection functions as an intermediate representation, which may therefore be easily replaced with a different one, e.g., to match the characteristics of a particular audio data source. The results obtained for a database containing annotated onsets for 17 different instruments and ensembles are compared with state-of-the-art solutions.
6
Content available remote Concrete Planning in PlanICS Framework by Combining SMT with GEO and Simulated Annealing
Niewiadomski A., Skaruz J., Switalski P., Penczek W.
Fundamenta Informaticae
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2016
|
Vol. 147, nr 2/3
289--313
EN
The paper deals with the concrete planning problem – a stage of the web service composition in the PlanICS framework. We present several known and new methods of concrete planning including those based on Satisfiability Modulo Theories (SMT), Genetic Algorithm (GA), as well as methods combining SMT with GA and other nature-inspired algorithms such as Simulated Annealing (SA) and Generalised Extremal Optimization (GEO). The discussion of all the approaches is supported by the complexity analysis, extensive experimental results, and illustrated by a running example.
7
Content available Combining SMT and Simulated Annealing into a Hybrid Planning Method
Skaruz J., Niewiadomski A., Penczek W.
Studia Informatica : systems and information technology
|
2015
|
Vol. 1-2(19)
43--48
EN
We present a new approach to the concrete planning (CP) - a stage of theWeb service composition in the PlanICS framework. A new hybrid algorithm (HSA) based on a combination of Simulated Annealing (SA) with Satisfiability Modulo Theories (SMT) has been designed and implemented. The main idea of our hybrid solution is to use an SMT-based procedure in order to generate an initial individual and then improve it during subsequent iterations of SA. The experimental results show that HSA is superior to the other methods we have applied to the CP problem, including Genetic Algorithm, an SMT-based approach, and our previously developed hybrids.
8
Content available Jednodniowe prognozy średniego stężenia metanu na wylocie z rejonu wentylacyjnego jako podstawa do doboru środków profilaktyki metanowej – studium przypadku
Badura H., Niewiadomski A.
Przegląd Górniczy
|
2015
|
T. 71, nr 12
41--48
PL
Artykuł realizowano na podstawie danych pomiarowych stężenia metanu na wylocie z rejonu wentylacyjnego ściany C-5 w pokładzie 401/1 w KWK „Pniówek”. Dla 152 dni obliczono wartości średnie stężenia metanu i zbadano właściwości szeregu czasowego średniego stężenia metanu. Dla tych samych dni przeprowadzono prognozy jednodniowe stężenia metanu dwoma metodami. Jedna z metod opiera się na autokorelacji stężenia metanu w dniu analizowanym i poprzednim, a druga uwzględnia dodatkowo wpływ wydobycia na stężenie metanu. Wykazano, że błędy prognoz są małe, a prognozy nadają się do doboru środków doraźnej profilaktyki metanowej.
EN
This paper was prepared on the basis of measurement data of concentration of methane at the outlet to the ventilation region of C-5 longwall in the seam no. 401/1 in "Pniówek" coal mine. The average values of methane concentration were calculated for 152 days and the properties of time series of the average methane concentration tested. Simultaneously, for those days, one-day prognoses of methane concentration were elaborated by use of two methods. The first one is based on the autocorrelation of methane concentration in the currently analyzed day and the preceding one. Alternatively, the second method takes also into account the influence of mining on the methane concentration. It has been proved that devations of the prognoses are insignificant and they are suitable to the selection of preventive measures for methane.
9
Content available remote Efficient similarity measures for texts matching
Akinwale A., Niewiadomski A.
Journal of Applied Computer Science
|
2015
|
Vol. 23, nr 1
7--28
EN
Calculation of similarity measures of exact matching texts is a critical task in the area of pattern matching that needs a great attention. There are many existing similarity measures in literature but the best methods do not exist for closeness measurement of two strings. The objective of this paper is to explore the grammatical properties and features of generalized n-gram matching technique of similarity measures to find exact text in electronic computer applications. Three new similarity measures have been proposed to improve the performance of generalized n-gram method. The new methods assigned high values of similarity measures and performance to price with low values of running time. The experiment with the new methods demonstrated that they are universal and very useful in words that could be derived from the word list as a group and retrieve relevant medical terms from database . One of the methods achieved best correlation of values for the evaluation of subjective examination.
10
Content available Techniczno-ekonomiczne aspekty stosowania trójgeneracyjnych układów energetycznych w podziemnych kopalniach węgla kamiennego
Niewiadomski A., Wrona P.
Przegląd Górniczy
|
2014
|
T. 70, nr 12
33--39
PL
Wykorzystanie metanu w kopalniach podziemnych węgla kamiennego może stać się istotnym elementem oszczędności, a także może zredukować emisję tego gazu do atmosfery. W artykule przedstawiono ideę stosowania kogeneracyjnych i trójgeneracyjnych układów energetycznych zasilanych metanem pochodzącym z procesu odmetanowania w kopalniach węgla kamiennego. Podano dwa przykłady zastosowania urządzeń pracujących w układzie trójgeneracyjnym wraz z wyznaczonymi szacunkowymi korzyściami płynącymi z ich wdrożenia. Obliczono, że dla pierwszego przykładu istnieje możliwość produkcji własnej energii elektrycznej na poziomie 81 696 MWh/rok oraz ciepła użytecznego 18 8711 GJ/rok. W drugim przykładzie wartości te wynoszą odpowiednio 27 040 MWh/rok energii elektrycznej oraz 64 210 GJ/rok ciepła użytecznego. W obu przykładach zainstalowane chłodziarki mogą w całości zostać zasilone energią produkowaną przez układ, pozwalając na produkcję chłodu użytecznego w zależności od stopnia zapotrzebowania. Wykazano także, że w przedstawionych rozwiązaniach redukcja emisji CO2 osiągnięta jest w związku ze spalaniem metanu w układach i wynosi 32 % w przykładzie I oraz 15 % w przykładzie II.
EN
The usage of methane in underground coal mines can be considered significant savings and it can decrease gas emissions to the atmosphere. This paper presents the concept of the use of cogeneration and trigeneration systems fueled by methane from coal mine. Two options for the utilization of devices using the trigeneration system has been presented along with the estimated profits coming from its use. For the first example, it was computed that there is a possibility to produce electricity at the level of 81 696 MWh/year and useful heat at 18 8711 GJ/year. For the second example the values are 27 040 MWh/year and 64 210 GJ/year, respectively. The coolers that are considered in these examples can be fed by that energy in both cases and produce cool, depending on the demand. It was also proved that in the given solutions it is possible to reduce CO2 emission by 32 % in the first case and by 15 % in the second one.
11
On multi-subjectivity in linguistic summarization of relational databases
Niewiadomski A., Superson I.
Journal of Theoretical and Applied Computer Science
|
2014
|
Vol. 8, nr 1
15--34
EN
We focus on one of the most powerful computing methods for natural-language-driven representation of data, i.e. on Yager’s concept of a linguistic summary of a relational database (1982). In particular, we introduce an original extension of that concept: new forms of linguistic summaries. The new forms are named Multi-Subject linguistic summaries, because they are constructed to handle more than one set of subjects, represented by related sets of records/objects collected in a database, like ”cars, bicycles and motorbikes” (within vehicles), ”male and female” (within people), e.g. More boys than girls play football well. Thanks to that, the generated linguistic summaries – quasi-natural language sentences – are more interesting and human-oriented. Moreover, they can be applied together with the classic forms od summaries, to enrich naturality of comments/descriptions generated. Apart from traditional interpretions linguistic summaries in terms of fuzzy logic, we also introduce some higher-order fuzzy logic methods, to extend possibilities of representing too complex or too ill-defined linguistic terms used in generated messages. The new methods are applied to a computer system that generates natural language description of numeric data, that makes them possible to be clearly presented to an end-user.
12
Content available remote Hierarchical fuzzy logic systems and controlling vehicles in computer games
Renkas K., Niewiadomski A.
Journal of Applied Computer Science
|
2014
|
Vol. 22, nr 1
201--212
EN
This paper presents a possible application of fuzzy logic systems to control vehicles in computer games. A new architecture of a fuzzy logic system is here proposed: Hierarchical Fuzzy Controller, that is composed of several fuzzy controllers in their classic meaning. ”Hierarchical” means that fuzzy sets produced as output of one of fuzzy controllers are then processed as input of another fuzzy controller. The use of such a controller significantly enhances the possibilities of computational intelligence methods in singleplayer games, i.e. where the enemy is controlled by an agent simulating real behaviour (movement, decisions, etc.). The proposal of an original architecture of Hierarchical Fuzzy Controller, built with fuzzy controllers (in the sense of Mamdani), and discussing advantages of using this architecture to control military vehicles in a 2D single-player game, in comparison to classic fuzzy controllers, are the main scope of the paper.
13
Skojarzone układy energetyczne sposobem gospodarczego wykorzystania metanu z pokładów węgla
Niewiadomski A., Wrona P.
Inżynieria Górnicza
|
2014
|
nr 3
20--23
PL
W niniejszym artykule przedstawiona została idea stosowania kogeneracyjnych i trójgeneracyjnych układów energetycznych zasilanych metanem pochodzącym z procesu odmetanowania w kopalniach węgla kamiennego. Zaprezentowano przykładowe rozwiązania techniczne, w oparciu o które możliwe jest wdrożenie układów trójgeneracyjnych. Ponadto przedstawiano potencjalne korzyści związane z wprowadzeniem tego typu rozwiązań w kopalniach węgla kamiennego.
EN
The article presents the concept of the use of cogeneration and trigeneration systems fueled by coal mine methane. The exemplary technical solutions on the basis of which it is possible to implement CCHP have been included. Moreover, potential benefits associated with the introduction of this solutions in coal mines have been presented.
14
Content available remote SMT Versus Genetic and OpenOpt Algorithms : Concrete Planning in the PlanICS Framework
Niewiadomski A., Skaruz J., Penczek W., Szreter M., Jarocki M.
Fundamenta Informaticae
|
2014
|
Vol. 135, nr 4
451--466
EN
The paper deals with the concrete planning problem (CPP) – a stage of the Web Service Composition (WSC) in the PlanICS framework. The complexity of the problem is discussed. A novel SMT-based approach to CPP is defined and its performance is compared to the standard Genetic Algorithm (GA) and the OpenOpt numerical toolset planner in the framework of the PlanICS system. The discussion of all the approaches is supported by extensive experimental results.
15
Content available Higher order fuzzy logic in controlling selective catalytic reduction systems
Niewiadomski A., Kacprowicz M.
Bulletin of the Polish Academy of Sciences. Technical Sciences
|
2014
|
Vol. 62, nr 4
743--750
EN
This paper presents research on applications of fuzzy logic and higher-order fuzzy logic systems to control filters reducing air pollution [1]. The filters use Selective Catalytic Reduction (SCR) method and, as for now, this process is controlled manually by a human expert. The goal of the research is to control an SCR system responsible for emission of nitrogen oxide (NO) and nitrogen dioxide (NO2) to the air, using SCR with ammonia (NH3). There are two higher-order fuzzy logic systems presented, applying interval-valued fuzzy sets and type-2 fuzzy sets, respectively. Fuzzy sets and higher order fuzzy sets describe linguistically levels of nitrogen oxides as the input, and settings of ammonia valve in the air filter as the output. The obtained results are consistent with data provided by experts. Besides, we show that the type-2 fuzzy logic controllers allows us to obtain results much closer to desired parameters of the ammonia valve, than traditional FLS.
16
Content available Solving the abstract planning problem using genetic algorithms
Skaruz J., Niewiadomski A., Penczek W.
Studia Informatica : systems and information technology
|
2013
|
Vol. 1-2(17)
29--48
EN
The paper presents a new approach based on genetic algorithms to the abstract planning problem, which is the first stage of the web service composition problem. An abstract plan is defined as an equivalence class of sequences of service types that satisfy a user query. Intuitively, two sequences are equivalent if they are composed of the same service types, but not necessarily occurring in the same order. The objective of our genetic algorithm (GA) is to return representatives of abstract plans without generating all the equivalent sequences. The paper presents experimental results compared with the results obtained from SMT-solver, which show that GA finds solutions for very large sets of service types in a reasonable time.
17
Content available remote Evaluating semantic similarity with a new method of path analysis in RDF using genetic algorithms
Strobin Ł, Niewiadomski A.
Journal of Applied Computer Science
|
2013
|
Vol. 21, nr 2
137--152
EN
This paper presents a novel method of evaluating semantic similarity by means of path analysis in RDF databases. Similarity is calculated by assignining each property (predicate in RDF terms) a weight, which is found using a genetic optimization algorithm. Presented method exhibits an advatage over existing methods, because of its flexibility and the fact that no prior knowledge of a particular database is necessary. This paper also presents an exemplary application of the method - recommendation engine. Proposed method is applied to a well known problem - music recommendation based on DBPedia. Results obtained in the experiment positively verify its advanntages and usefulness.
18
Content available remote Towards Automated Abstract Planning Based on a Genetic Algorithm
Skaruz J., Niewiadomski A., Penczek W.
Prace Instytutu Podstaw Informatyki Polskiej Akademii Nauk
|
2012
|
Nr 1026
1--32
EN
The paper presents a new approach based on nature inspired algorithms to an automated abstract planning problem, which is a part of the web service composition problem. An abstract plan is defined as an equivalence class of sequences of service types that satisfy a user query. Intuitively, two sequences are equivalent if they are composed of the same service types, but not necessarily occurring in the same order. The objective of our genetic algorithm (GA) is to return representatives of abstract plans without generating all the equivalent sequences. The paper presents experimental results, which show that GA finds solutions for very large sets of service types in a reasonable time.
PL
Raport przedstawia nowe podejście do problemu planowania abstrakcyjnego za pomocą algorytmów genetycznych (AG). Problem planowania abstrakcyjnego polega na takiej kompozycji usług sieciowych, która spełnia zapytanie użytkownika. W raporcie pokazano sposób zastosowania AG do rozwiązania problemu planowania abstrakcyjnego oraz zaprezentowano wyniki eksperymentalne.
19
Content available remote SMT-based Abstract Planning in PlanICS Ontology
Niewiadomski A., Penczek W., Półrola A.
Prace Instytutu Podstaw Informatyki Polskiej Akademii Nauk
|
2012
|
Nr 1027
1--42
EN
The paper deals with the abstract planning problem - the first stage of Web Service Composition (WSC) in the Planics framework. We present a solution based on a compact repre-sentation of abstract plans by multisets of service types and a reduction of the planning problem to a task for an SMT-solver. The paper presents theoretical aspects of the abstract planning as well as some details of our symbolic encoding and implementation, followed by preliminary experimental results.
PL
Przedmiotem niniejszej pracy jest problem planowania abstrakcyjnego - pierwszy etap kompozycji usług sieciowych w systemie Planics. Prezentujemy rozwiązanie bazujące na kompaktowej reprezentacji planów abstrakcyjnych za pomocą wielozbiorów typów usług i redukcji problemu planowania do problemu spełnialności instancji SMT (Satisfiability Modulo Theories). Przedstawiamy zarówno teoretyczne aspekty planowania, jak również szczegóły symbolicznego kodowania i implementacji oraz wstępne wyniki eksperymentalne.
20
Content available remote Effective similarity measures in electronic testing at programming languages
Akinwale A., Niewiadomski A.
Journal of Applied Computer Science
|
2012
|
Vol. 20, nr 2
7--26
EN
The purpose of this study is to explore the grammatical proper ties and features of generalized n-gram matching technique in electronic test at programming languages. N-gram matching technique has been success fully employed in information handling and decision support system dealing with texts but its side effect is size n which tends to be rather large. Two new methods of odd gram and sumsquare gram have been proposed for the improvement of generalized n-gram matching together with the modification of existing methods. While generalized n-grams matching is easy to generate and manage, they do require quadratic time and space complexity and are therefore ill-suited to the proposed and modified methods which work in quadratic in nature. Experiments have been conducted with the two new methods and modified ones using real life programming code assignments as pattern and text matches and the derived results were compared with the existing methods which are among the best in practice. The results obtained experimentally are very positive and suggested that the proposed methods can be successfully applied in electronic test at programming languages.
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