Browsing by Subject "fuzzy logic"

Now showing 1 - 18 of 18

Access status: Open Access ,
A computer vision system for on-line two-phase gas-liquid flows recognition using fuzzy methods
(Wydawnictwa AGH, 2011) Fiderek, Paweł; Kucharski, Jacek
Artykuł zawiera dokładny opis specjalnego stanowiska skonstruowanego w celu badań nad automatycznym rozpoznawaniem przepływów dwufazowych typu gaz ciecz. Znajduje się w nim dokładny opis wykorzystanego w tym celu sprzętu, wykorzystanego oprogramowania przez opis najciekawszych zastosowanych algorytmów przetwarzania i rozpoznawania obrazów aż po opis rozmytego systemu wnioskującego, który jest projektowany w ramach prowadzonych badań.
Access status: Open Access ,
Algorytmy rozmyte w nawigacji kołowego robota mobilnego
(Wydawnictwa AGH, 2010) Garbacz, Maciej; Zaczyk, Mieczysław
In the article an obstacle avoidance algorithm for mobile robot Khepera III based on fuzzy logic is presented. In this application Matlab/Simulink system is used. Proximity sensors are used to detect obstacles. Presented fuzzy logic algorithm calculate control of robot using information from proximity sensors.
Access status: Open Access ,
Application of Fuzzy Cognitive Maps to analysis of development scenarios for academic units
(Wydawnictwa AGH, 2013) Szwed, Piotr
Dla wielu klas zagadnień podejmowanie decyzji, określenie strategii postępowania lub formułowanie ocen na podstawie precyzyjnych modeli ilościowych może być bardzo trudne w realizacji. Rozmyte mapy kognitywne (ang. FCM - Fuzzy Cognitive Maps) są znanym narzędziem jakościowej analizy systemów wykorzystującym prostą reprezentację wiedzy w postaci grafu pojęć i zależności przyczynowych pomiędzy nimi. Ich zaletą jest zarówno łatwość gromadzenia wiedzy, jak i prostota technik wnioskowania bliska sieciom neuronowym. Celem artykułu jest opisanie eksperymentu polegającego zastosowaniu FCM dla analizy zagadnienia słabo poddającego się ocenie ilościowej, jakim jest prognoza rozwoju jednostek naukowo-dydaktycznych. Praca podsumowuje rezultaty analizy w postaci scenariuszy rozwoju dla czterech reprezentatywnych klas jednostek: silnych, średnich, słabych z potencjałem i słabych oraz omawia zebrane obserwacje dotyczące wnioskowania z wykorzystaniem rozmytych map kognitywnych.
Access status: Restricted ,
Automatyczne generowanie reguł w regulatorze rozmytym
(Data obrony: 2016-01-26) Wiśniewski, Michał
Wydział Inżynierii Mechanicznej i Robotyki
Access status: Open Access ,
Comparison of two kinds of fuzzy arithmetic, LR and OFN, applied to fuzzy observation of the cofferdam water level
(Wydawnictwa AGH, 2013) Czerniak, Jacek; Dobrosielski, Wojciech; Angryk, Rafał
This paper presents certain important aspect soft he fuzzy logic extension, one of whichis OFN. It includes basic definition soft hat discipline. It also compares fuzzy logic arithmetic with the arithmetic of ordered fuzzy numbers in L-R notation. Computational experiments were based on fuzzy observation of the impounding basin. The results of the study show that there is a connection between the order of OFN number and trend of changes in the environment. The experiment was carried out using computer soft ware developed specially for that purpose.When comparing the arithmetic of fuzzy numbers in L-R notation with the arithmetic of ordered fuzzy number son the ground soft he experiment, it has been concluded that with fuzzy numbers it ispossible to expand the scope of solutions in comparison to fuzzy numbers inclassic form. The symbol of OFNflexibility is the possibility to determine the number that always satisfies the equation $A+X=C$, regardles soft hevalue of arguments. Operations performed on OFN are less complicated, as the yare performed in the same way regard less the sign of the input data and the irresultsare more accuratein the majority of cases. The promising feature of ordered fuzzy numbers is their lack of rapidly growing fuzziness. Authors expect to see implication of that fact in practice in the near future.
Access status: Open Access ,
Controlling of logistics projects
(AGH University of Science and Technology Press, 2011) Pisz, Iwona
A logistics project can be defined as a complex, special and unique sets of activities which can be described by technical and economic parameters and is determined by cost, time, and scope in order to aid logistics management in enterprise/supply chain. Controlling of the logistics project is process of measuring progress toward an objective, evaluating what remains to be done, and taking the necessary corrective tasks to achieve or exceed the objectives of the logistics project. This paper describes the idea of logistics projects. The controlling of logistics projects is discussed. In the paper tools dedecated for controlling of logistics projects are presented. The tools can be applied to the controlling process to support the management of logistics projects.
Access status: Open Access ,
Data storage management using AI methods
(Wydawnictwa AGH, 2013) Funika, Włodzimierz; Szura, Filip
Data management and monitoring is an important issue in scientific computation. Scientists want to access their data as quickly as possible. Some experiments need to store a lot of data which have to be secure. By saying this we mean that this data can not disappear or be damaged also the data storage should be as cheap as possible. In this paper we present an approach to the automation of monitoring and management of data storage. We introduce a knowledge based system which is able to manage data, i.e., make decisions on migrating data, replicating or removing it. We discuss some of the existing solutions which are popular on the market. In this paper we aim to present our system which uses such AI techniques like fuzzy logic or a rule-based expert system to deal with data storage management. We exploit in this system a cost model to analyze the proposed solutions. The operations performed by our system are aimed to optimize the usage of the monitored infrastructure.
Access status: Open Access ,
Dynamic fuzzy model for detecting verbal violence in real time
(Wydawnictwa AGH, 2022) Campos, Obed; Pancardo, Pablo; Hernández-Nolasco, José Adán
The crime rates in Mexico have been increasing in recent years, every day, there are reports on social media and in the news where assaults and verbal aggression by criminals can be seen. Public transportation units suffer from violence that authorities have not been able to reduce despite their efforts. This is why we have developed a fuzzy logic model that can adapt to almost any scenario thanks to the dynamism that we have implemented in each of its stages. We have obtained promising results that we believe will be of great help to the authorities for detecting the exact moment in which verbal aggression that is typical of a violent assault is happening in real time. This is a tool to help the authorities, not a substitution, we are simply making use of the latest technologies that are available to us. The goal of this paper is to provide a novel method for Mexican authorities in Mexico City in order to help the actual surveillance systems make faster decisions about whether violent assaults are happening or not.
Access status: Open Access ,
Koncepcja wspomagania analizy ryzyka za pomocą logiki rozmytej na przykładzie zagrożenia wyrzutowego w kopalni węgla kamiennego
(Wydawnictwa AGH, 2008) Skoczylas, Norbert
The work contains suggestions about the use of fuzzy logic in the issues connected with the safety of works in mining. There are still problems in this area. Description of these problems in a traditional manner with the use of mathematical correlation seems impossible in the nearest future. It is, therefore, worth applying different techniques of the phenomena and processes description, such as fuzzy logic. The author presents an expert system created on the base of fuzzy logic. It allows to estimate the risk of appearance of gas and coal outburst depending on the gas emission index and index of firmness. Functioning of the system was demonstrated giving the example of the analysis of the risk of gas and coal outburst appearance for the H4 409/3 gate in »Zofiówka« mine as well as H6 409/3 gate in »Zofiówka« mine.
Access status: Open Access ,
Konstrukcja regulatora rozmytego w środowisku labVIEW dla suwnicy 3D
(Wydawnictwa AGH, 2010) Kuck, Robert; Pauluk, Mariusz
The paper presents a fuzzy controller, designed and built in the labVIEW environment. The controller is dedicated for the tower crane laboratory model. Its aim is to transport a suspended payload in a save way. All oscillations of the payload (caused by the crane movement as well as disturbances) should be dumped. The controller is realized with the labVIEW toolkits: Fuzzy Logic Toolkit, PID Control Toolkit. For construction purposes a typical Mamdani type fuzzy controller has been chosen. It is assumed, a structure of the controller is separated. So, the controller contains: three position fuzzy controllers type P, each for axes: x, y and z and two ones type PD minimizing the payload fluctuation.
Access status: Open Access ,
Modele z filtrem Kalmana i rozmyte w systemach dynamicznego pozycjonowania
(Wydawnictwa AGH, 2011) Zalewski, Paweł
Dynamic positioning of a ship is a process comprising two problems: 1) forcing the output of the ship to maintain a constant reference position and heading and 2) path following. In both cases the control is achieved using combination of several thrusters and rudders. The article presents various solutions to these control problems of offshore vessels, utilizing numerical filtration and fuzzy methods.
Access status: Open Access ,
Models, methods and information technologies of protection of corporate systems of transport based on intellectual identification of threats
(2015) Petrov, Oleksandr; Korčenko, Oleksandr Grigorovič; Lahno, Valeriy
In the article, results of the research on the development of methods and models of intellectual recognition of threats to information systems of transport. The article contains results of the research that allows us to raise the level of protection of the automated and intellectual information systems of the transportation enterprises (AISTE) in the conditions of the intensification of transportation. The article contains mathematical models and results of estimation information systems having Internet connection through various communication channels. The article also considers the issues of research and protection of the AISTE under the condition of several conflict-data-request threads.
Access status: Restricted ,
Nadążny i stabilizujący regulator rozmyty dla aktywnej lewitacji magnetycznej
(Data obrony: 2017-01-20) Lelowicz, Kamil
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
Access status: Open Access ,
Real-time operational control in information management system for flash-butt welding of rails
(Wydawnictwa AGH, 2017) Kučuk-Âcenko, Sergìj Ìvanovič; Rudenko, Petr Mihajlovič; Gavriš, Valerij Semenovič; Dìdkovsʹkij, Oleksandr Volodimirovič; Švec, Valentina Ivanovna; Antipin, Evgenij Valentinovič; Wojtas, Piotr; Kozłowski, Artur
Operational control of welding quality is the fundamental element of the entire rail manufacturing process. In practice, real-time systems are used for this purpose. This article features a new method that makes use of fuzzy logic to analyze the data from mechanical tests and from the ultrasound inspection of connections.
Access status: Open Access ,
Supervising control system for oriented PV using weather forecasts
(Wydawnictwa AGH, 2017) Ciurej, Maciej
This paper is devoted to the problem of controlling an oriented PV using weather forecasts. The described solution presents the use of fuzzy logic fundamentals in order to increase the efficiency of a PV system. It differs from most related papers in the fact that it uses fuzzy logic in order to process weather condition numeric values as input data. All of necessary steps to reproduce the proposed solution have been included.
Access status: Open Access ,
The application of fuzzy logic analysis to assessing the significance of mixing parameters for the PM metal-ceramic composite
(2007) Wojtaszek, Marek; Durak, Jarosław
An attempt to implement the fuzzy logic to quick and economic analysis of the mixing process in two component system (alumina powder-ceramic fibres) was made. An experiment with composites made by the powder metallurgy method and the determination of its selected properties were carried out. To obtain samples cold moulding and coextrusion were used. The forming process was made with constant parameters of mixing and forming. The influence of fibrę volume fraction in the matrix on the selected properties and the microstructure of the product was investigated. Experimental results and experts' knowledge were the input information for numerical computations and were represented by linguistic variables, fuzzy sets and fuzzy rules. Obtained or estimated in such way information from the technical point of view must be treated as an incomplete and uncertain knowledge. It means the mathematical description verified by experiments is not available. This knowledge was used to analyse the mixing parameters by the fuzzy logic. To implement inference the Fuzzy Logic Toolbox from Matlab package was used.
Access status: Open Access ,
The use of fuzzy logic for description of spatial relations between objects
(Wydawnictwa AGH, 2010) Jaworski, Tomasz; Kucharski, Jacek
The goal of this article is to present a review of major methods and algorithms for assessing directional spatial relations between fuzzy and crisp objects in 2D image. The types of relations mentioned are: point - point, point - object, crisp object - crisp object, fuzzy object - fuzzy object. Presented article also takes into account further research on use of fuzzy directional spatial relations for dynamical process modeling on base of tomograms and thermograms.
Access status: Restricted ,
Układy dynamiczne w praktyce giełdowej
(Data obrony: 2015-12-17) Barbacki, Rafał
Wydział Matematyki Stosowanej