Przeglądaj {{ collection }} wg Autor "Niewiadomski, Adam"

Teraz wyświetlane 1 - 13 z 13

Dedicated Type-2 Fuzzy Logic Systems: A Novel Approach to DeNOx Filtration Systems
(Wydawnictwo Politechniki Łódzkiej, 2018) Niewiadomski, Adam; Kacprowicz, Marcin
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.
Effective similarity measures in electronic testing at programming languages
(Wydawnictwo Politechniki Łódzkiej, 2012) Akinwale, Adio; Niewiadomski, Adam
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.
Efficient Similarity Measures for Texts Matching
(Wydawnictwo Politechniki Łódzkiej, 2015) Niewiadomski, Adam; Akinwale, Adio
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.
Evaluating semantic similarity with a new method of path analysis in RDF using genetic algorithms
(Wydawnictwo Politechniki Łódzkiej, 2013) Strobin, Łukasz; Niewiadomski, Adam
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.
Free and open software for applied statistics. A comparison and a case study in biometrics
(Wydawnictwo Politechniki Łódzkiej, 2011) Niewiadomska, Ewa; Niewiadomski, Adam
This article is intended to be a position paper on advantages of free and open software for statistics and its applications to biometrics and biostatistics. Especially, the authors focus on the R package viewed as a new and still insufficiently recognized or received by the scientists, researchers, students, etc. Sample statistical computations and tests in biometrics are presented, and the most common functions and procedures are analysed and compared. Although this is a position paper from the point of view of applied computer science, the authors briefly present some original results within applied statistics (in particular: biometrics) and related computational methods using dedicated software.
Hierarchical fuzzy logic systems and controlling vehicles in computer games
(Wydawnictwo Politechniki Łódzkiej, 2014) Renkas, Krzysztof; Niewiadomski, Adam
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.
Higher order fuzzy logic in controlling selective catalytic reduction systems
(Division IV: Engineering Sciences of the Polish Academy of Sciences, 2014) Niewiadomski, Adam; Kacprowicz, Marcin
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.
In memory of Dr. Andrzej Małolepszy. Technical Editor of JACS
(Wydawnictwo Politechniki Łódzkiej, 2009) Szczepaniak, Piotr; Byczkowska-Lipińska, Liliana; Kącki, Edward; Niewiadomski, Adam
Linguistic Summaries of Graph Databases in Customer Relationship Management (CRM)
(Wydawnictwo Politechniki Łódzkiej, 2019) Bartczak, Monika; Niewiadomski, Adam
The paper concentrates on data models that differ from the traditional relational one by Codd (1970). In particular, we are interested in processing graph databases (graph datasets) without any pre-configured structure, in which graph nodes may represent different objects and graph edges – relations between them. In this approach, the linguistic summarization methods for graph datasets are introduced, and differences for these methods with respect to traditional relational approach are shown, commented and improved in comparison to the preceding proposition (Strobin, Niewiadomski, 2016). The novelty of the paper is mostly the new form for summaries: Multi-Subject linguistic summaries of graph databases, previously introduced for relational databases (Superson, 2018).
Methods for the Linguistic Summarization of Data: Applications of Fuzzy Sets and Their Extensions
(Akademicka Oficyna Wydawnicza EXIT, Warszawa, 2008) Niewiadomski, Adam; Byczkowska-Lipińska, Liliana; Zadrożny, Sławomir
Monografia dotyczy zastosowań teorii zbiorów rozmytych i ich rozszerzeń do reprezentowania nieprecyzyjnej informacji lingwistycznej i budowy tzw. lingwistycznych podsumowań baz danych. Oryginalnym elementem są tu zwłaszcza propozycje rozszerzeń rachunku wyrażeń kwantyfikowanych lingwistycznie reprezentowanych w oparciu o interwałowe zbiory rozmyte i zbiory rozmyte typu 2. Zaproponowane metody reprezentacji służą następnie do konstrukcji i ewaluacji zdań w języku quasi-naturalnym, które opisują ogólne własności danych zgromadzonych w bazach. Przedstawiono także przykładowe zastosowania proponowanych metod, w e-learningu oraz automatycznym generowaniu komentarzy prasowych.
On multi-subjectivity in linguistic summarization of relational databases
(Komisja Informatyki Polskiej Akademii Nauk, Oddział w Gdańsku, 2014) Niewiadomski, Adam; Superson, Izabela
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 termsof 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.
The Gentzen sequent calculus in e-testing. Pt. 1: Foundations
(Wydawnictwo Politechniki Łódzkiej, 2010) Niewiadomski, Adam; Indrzejczak, Andrzej
Modern methods and trends in education, especially the so-called e-learning, are undeniably more and more popular and widely applied in recent years. The paper is focused on the subdomain of the e-learning area which is named e-testing and it concerns the problem of replacing the manual checking and evaluating of distance exams with automated and intelligent procedures run by dedicated computer systems. A popular system of automated theorem proving by Gentzen [1] is applied to mechanise the process of checking and evaluating e-tests in set theory and logics. The paper presents the general rules according to which such an e-test should be built, then the evaluating algorithm based on the Gentzen sequent calculus is presented and exemplified, finally the detailed comments on the implementation and the results are given.
The Gentzen sequent calculus in e-testing. Pt. 2: Algorithms and implementation
(Wydawnictwo Politechniki Łódzkiej, 2010) Niewiadomski, Adam; Indrzejczak, Andrzej
This paper contains the description of algorithms and their implementations, the foundations and background of which are presented in Part I of this paper [1].